CN1708375A - Tapping method and tapping device and punching machine - Google Patents

Abstract

A tapping method, comprising: a process of engaging the front end of a tap (47) of a tapping tool (37) mounted on a flexibly rotatable rotary die indexing device (7) of a punching machine with a threaded bottom hole provided on a workpiece; a process of rotating the tap (47) forward when the front end of the tap (47) is in a state of engaging with the threaded bottom hole and rotating a control motor M of the rotary die indexing device (7) forward; and a process of stopping the forward rotation of the control motor M and reversing the rotation to disengage the tap (47) from the threaded bottom hole of the workpiece when it is detected that the control motor M of the rotary die indexing device (7) has rotated a specified number of times or a specified time has passed.

Description

Tapping method and chasing bar and punch press

Technical field

The present invention relates to for example punch press of turntable punch press etc. tapping method and chasing bar and punch press that the thread Pilot hole of being located on the plate workpiece is carried out tapping processing of a kind of utilization, in more detail, relating to a kind of rotary die indexing means that utilizes punch press to possess carries out the tapping method for processing and can detect chasing bar and the punch press whether screw tap fractures.

Background technology

In the past, disclosed a kind ofly for example on the punch press of turret type punch press etc., after having carried out plunging processing or thread Pilot hole processing on the plate workpiece, above-mentioned plunging had been added the technology that the Ministry of worker or thread Pilot hole carry out tapping processing.For example the spy of Japan opens flat 8-71848 communique (below, be called " patent documentation 1 ") and the spy of Japan to open flat 9-155638 communique (below, be called " patent documentation 2 ") described.

And, also developed a kind of structure of on the rotary die indexing means that can rotate flexibly that punch press possessed, chasing bar being installed and carrying out tapping processing.For example, it is described that No. 2541404 communique of Japan's utility model registration (below, be called " patent documentation 3 ") and the spy of Japan open flat 7-185975 communique (below, be called " patent documentation 4 ").

On the other hand, in traditional chasing bar, as detecting the structure whether screw tap fractures, be on the threading die of and supporting workpiece relative with screw tap, developed a kind of movable block that moves because of the screw tap that runs through workpiece that has, utilize the action that detects this movable block as the sensor of microswitch, to detect the structure that above-mentioned screw tap fractures.For example, it is described that the spy of Japan opens flat 9-47917 communique (below, be called " patent documentation 5 ").

In above-mentioned patent documentation 1 described invention, it is the slide block (pressure head) of the flexible knee-action of energy that will utilize punch press to possess, convert to and rotatablely move and push punch member on the throw device that possesses throws such as the screw tap, Hinge cutter rectilinear motion when descending, so that the structure that above-mentioned throw rotates.

In said structure, be used for rectilinear motion being converted to the complex structure that rotatablely moves and,, having produced short problem of screw tap life-span so need the revolution of more above-mentioned throw because the haul distance of slide block knee-action is short.

In above-mentioned patent documentation 2 described inventions, the tapping machining position of the Working position of punch press and chasing bar is equipped with bigger position deviation, when near machining screw bottom outlet workpiece end and carry out tapping and add man-hour, need to change the location of workpiece that the workpiece moving positioning device that carries out workpiece running fix is controlled, and need individually drive the motor of chasing bar.

Therefore, wish improving working (machining) efficiency, and more simplification aspect of structure is further improved.

In above-mentioned patent documentation 3 described inventions, owing to be on the rotary die indexing means that can rotate flexibly that possesses at punch press threading tool to be installed, the motor that utilizes rotation to drive above-mentioned rotary die indexing means makes the structure of threading tool rotation, so be not only the structure that can solve patent documentation 1,2 described the problems referred to above but also possess main leading screw and carry out the screw tap feeding, and because for utilizing planetary gears etc. to make the structure of screw tap rotation speedup, so have the problem of complicated integral structure.

In above-mentioned patent documentation 4 described inventions, have on the rotary die indexing means that possesses at punch press threading tool has been installed, and utilize the motor of rotary die indexing means and the structure of carrying out screw tap rotation and carrying out tapping processing, but because of partly have the auxiliary section with slide block at drift, and have the structure of under slide block and state that this auxiliary section cooperates, carrying out the speed increasing mechanism of screw tap rotation speedup, so have baroque problem.

In addition, in above-mentioned patent documentation 5 described inventions, owing to being that the movable block that utilizes threading die to possess makes microswitch ON, the OFF as sensor, and the structure that the detection screw tap fractures, when above-mentioned microswitch when ON state or OFF state produce fault, have and be difficult to ON state or the OFF state of judging that screw tap fractures, still because of the problem of the ON state or the OFF state of microswitch fault.

In addition, in the patent documentation 5, also have the movable block that the screw tap mould possessed and hinder the problem that tapping adds the smear metal that produces man-hour of discharging.

Summary of the invention

The present invention develops for addressing the above problem, and its first purpose is: provide a kind of rotary die indexing means that with simple structure, easily utilizes punch press and possessed to carry out tapping method and the chasing bar and the punch press of tapping processing.

Second purpose of the present invention provides a kind of can detecting and is used to detect that screw tap fractures and tapping method and the chasing bar and the punch press of the sensor fault that damages.

And the 3rd purpose of the present invention provides and a kind ofly can attract to discharge tapping and add tapping method and chasing bar and the punch press that produces smear metal man-hour.

For achieving the above object, tapping method of the present invention according to the 1st aspect, be on punch press, to carry out the tapping method for processing, its be by: will be possessed the screw tap leading section of installing on the rotary die indexing means that can rotate flexibly that threading tool possessed at punch press, (a) operation that cooperates with thread Pilot hole on being located at workpiece, when above-mentioned screw tap front end just changes above-mentioned screw tap in state that above-mentioned thread Pilot hole cooperates the time, and the control motor that the makes above-mentioned rotary die indexing means operation of just changeing (b), when the control motor that detects above-mentioned rotary die indexing means has rotated the regulation revolution, stop above-mentioned control motor and reverse and make above-mentioned screw tap break away from the tapping method that the operation of (c) constitutes from thread Pilot hole.

Tapping method of the present invention according to the 2nd aspect, be on punch press, to carry out the tapping method for processing, its be by: will be possessed the screw tap leading section of installing on the rotary die indexing means that can rotate flexibly that threading tool possessed at punch press, (a) operation that cooperates with thread Pilot hole on being located at workpiece, when above-mentioned screw tap front end just changes above-mentioned screw tap in state that above-mentioned thread Pilot hole cooperates the time, and the control motor that the makes above-mentioned rotary die indexing means operation of just changeing (b), when the control motor that detects above-mentioned rotary die indexing means begins rotation and when having passed through the stipulated time, stopping above-mentioned control motor is just changeing and reverse and make above-mentioned screw tap break away from the tapping method of the operation formation of (c) from thread Pilot hole.

Structure according to the chasing bar of the present invention of the 3rd aspect, be in the knife bar body on being installed in the rotary die indexing means that can rotate flexibly that punch press possesses with moving up and down flexibly, only be provided with flexibly with moving up and down and possess the screw tap clamp of screw tap and apply elastic force upward, and be provided with the down maneuver transmission mechanism that the down maneuver of flexible motion slide block about the energy that is used for above-mentioned punch press is possessed passes to above-mentioned screw tap clamp in above-mentioned knife bar upper part of body.

Structure according to the chasing bar of the present invention of the 4th aspect, be in the bar body on being installed in the rotary die indexing means that can rotate flexibly that punch press possesses with moving up and down flexibly, only the bottom being set with moving up and down flexibly possesses the screw tap clamp of screw tap and applies elastic force upward, and pass to the down maneuver transmission mechanism of above-mentioned screw tap clamp in the down maneuver of the slide block that can move up and down flexibly that is used for above-mentioned punch press is possessed, have pressing mechanism and impact absorption mechanism that fluid pressure that utilization supplies with from above-mentioned slide block is pushed above-mentioned screw tap clamp downwards.

According to the chasing bar of the present invention of the 5th aspect, be in the chasing bar of the third aspect or fourth aspect, in the bottom of above-mentioned knife bar body, possess the workpiece presser feet that can rotate flexibly.

Structure according to the chasing bar of the present invention of the 6th aspect, be on the chasing bar aspect the third aspect, the fourth aspect or the 5th, on above-mentioned down maneuver transmission mechanism and above-mentioned screw tap clamp, has the oil flow passage of the above-mentioned screw tap that is used for to lead from the oil that above-mentioned slide block is supplied with.

Chasing bar of the present invention according to the 7th aspect, be in the chasing bar aspect the 3rd, the 4th, the 5th or the 6th, on above-mentioned down maneuver transmission mechanism, be provided with to overcome flexibly and should make the elastic mechanism of the above-mentioned slide block down maneuver that this screw tap clamp descends make progress elastic force and transmit of above-mentioned screw tap clamp.

Punch press of the present invention according to the 8th aspect, be to possess to be used to be rotated the punch press that mould rotates the rotary die indexing means of calibration, its structure is to possess to control the motor controlling organization that rotation drives the control motor of above-mentioned rotary die indexing means flexibly according to the rotation calibration of rotary die and with the threading tool tapping processing that is installed on the rotary die indexing means.

Punch press of the present invention according to the 9th aspect, in the punch press aspect the 8th, the said motor controlling organization has: above-mentioned control motor begins just to change and when having rotated the regulation revolution or having passed through the stipulated time, be used to stop the direction of rotation switching mechanism that just to change and be converted to counter-rotating of above-mentioned control motor when detecting.

Chasing bar of the present invention according to the 10th aspect, be the thread Pilot hole that is formed on the workpiece to be carried out the screw tap of tapping processing and the screw tap mould of supporting workpiece in the face of being used for, has the movable block that moves because of the above-mentioned screw tap that connects above-mentioned workpiece, and the chasing bar that possesses the sensor that detects this movable block action, it is the structure that possesses the sensor monitoring mechanism that monitors the sensor state.

Chasing bar of the present invention according to the 11st aspect, be to carry out the screw tap opposite of tapping processing and the screw tap mould of supporting workpiece with the thread Pilot hole that is used for being formed on the workpiece, have the movable block that moves because of the above-mentioned screw tap that connects above-mentioned workpiece, and possess the structure of the air squit hole of ejection air when this movable block action on the tap in this movable block.

According to the chasing bar of the present invention of the 12nd aspect, be in the chasing bar aspect the 11st, above-mentioned air squit hole points to the structure of the discharge direction of above-mentioned tap.

As from the foregoing, according to the present invention,, and can solve above-mentioned problem in the past even also can utilize the tapping processing of the rotary die indexing means that punch press possessed with simple structure.

In addition, according to the present invention, can detect the fractureing of screw tap, also can detect the fault that is used to detect the sensor that screw tap fractures, and can attract to discharge tapping and add the smear metal that produce man-hour, and can solve above-mentioned problem in the past.

Description of drawings

Fig. 1 is the punch press of the embodiment of the invention and the cross-sectional illustration figure of threading tool.

Fig. 2 is the profile of the threading tool structure partial improvement of the embodiment of the invention.

Fig. 3 is the key diagram of the tapping processing unit (plant) of the ground of the generalities roughly expression embodiment of the invention.

Fig. 4 is the formation block diagram that major part constitutes in the control device of expression tapping processing unit (plant).

Fig. 5 is that expression detects the flow chart that screw tap fractures and moves.

Fig. 6 is that expression detects the flow chart that screw tap fractures and moves.

Fig. 7 is the profile that detects the tapping processing unit (plant) that screw tap fractures.

Fig. 8 is the profile that detects the tapping processing unit (plant) that screw tap fractures.

Fig. 9 is the vertical view that detects the tapping processing unit (plant) that screw tap fractures.

Figure 10 is the X-X cross-sectional view of Fig. 8.

The specific embodiment

Below, with reference to accompanying drawing, describe in detail according to tapping method of the present invention and chasing bar and punch press

Embodiment.

As shown in Figure 1, the punch press of present embodiment, for example it has: the top capstan head of rotating tower punch, be equivalent to the bottom capstan head patrix supporting seat 1, possess counterdie supporting seat 3 and can move up and down flexibly and can regulate the slide block (pressure head) 5 of upper-lower position.In addition, because this kind punch press is known by everybody, so omit the detailed description of all structures of punch press.

On above-mentioned patrix supporting seat 1, the rotary die indexing means 7 of mold (omitting diagram) the directionality calibration that has for example rectangular tropism's processing in hole on plate workpiece W has been installed.This rotary die indexing means 7 possesses the rotating cylinder 11 of the drum that can be flexibly supported by above-mentioned patrix supporting seat 1 rotatably by a plurality of bearings 9, has integrally fixed the worm gear 13 of ring-type on the top of this rotating cylinder 11.

Closing the worm screw (omitting diagram) that the control motor because of flexibly rotating rotates at above-mentioned worm gear 13 Shang ， Nogami.In addition, on worm gear 13, the block 17 of origin sensor 15 actions of for example travel switch that makes on the appropriate location that is located at above-mentioned patrix supporting seat 1 etc. has been installed.In addition, also can be the structure that replaces worm gear and worm screw with timing belt pulley and synchronous belt, utilize the control motor to make the timing belt pulley rotation.

Thereby, when utilizing above-mentioned control motor M to make worm gear 13 rotation, and when making above-mentioned origin sensor 15 actions, can detect as being installed in the origin position that mold on the above-mentioned rotating cylinder 11 is positioned at direction of rotation by above-mentioned block 17.Perhaps, use the motor of band absolute encoder, need not part such as origin sensor and also can detect origin position.In addition, can detect the rotation of control motor M with the turn-sensitive device 19 of the rotary encoder that possesses above-mentioned control motor M etc. and detect the position of rotation of mold from origin position.

Top position at above-mentioned rotary die indexing means 7 has disposed to flexible motion mould seat 21 up and down.In more detail, on uprightly be arranged at above-mentioned patrix supporting seat 1 on the pilot pin 23 of many places, supporting sliding sleeve 25 to flexible motion up and down, installing at this sliding sleeve 25 and between above the above-mentioned patrix supporting seat 1 above-mentioned sliding sleeve 25 is applied the lifting spring 27 of normal pressure upward.

Above-mentioned a plurality of sliding sleeve 25 is raised plate 29 and integrally links, and on this riser 29 position corresponding to above-mentioned rotating cylinder 11 anchor clamps tube 31 cylindraceous has been installed.This anchor clamps tube 31, be to support the device that is installed in the mold on the above-mentioned rotary die indexing means 7 with loading and unloading, the bottom of this anchor clamps tube 31 embeds in the above-mentioned rotating cylinder 11 from upside to flexible motion up and down, in the bottom of this rotating cylinder 11, be provided with bulge 33 in the ring-type that supports mold.

Be installed in the threading tool 35 (chasing bar) that uses on the rotary die indexing means 7 that constitutes as mentioned above, have the die shank body 37 that can be entrenched in the drum on the above-mentioned rotating cylinder 11 with moving up and down flexibly.On these die shank body 37 outer circumference surfaces, formed the above-below direction keyway 41 that the key 39 that possessed with above-mentioned rotating cylinder 11 inner peripheral surface bottoms cooperates.

And, in above-mentioned die shank body 37, be provided with to flexible motion the key 43 that utilizes die shank body 37 to be possessed up and down and limit the screw tap clamp 45 that rotates, can load and unload in the bottom of this screw tap clamp 45 screw tap 47 that protrudes downwards has been installed with changing.The top of above-mentioned screw tap clamp 45, protrude from the large diameter hole 37H that is located on the above-mentioned die shank body 37, in the bottom of this large diameter hole 37H and be located between the flange part 45F of above-mentioned screw tap clamp 45 upper ends, the elastomeric element 49 that screw tap clamp 45 is applied upward the helical spring etc. of normal pressure has been installed.

And on above-mentioned screw tap clamp 45, be provided with the through hole 45H of the perforation above-below direction that is communicated with the screw tap installing hole that above-mentioned screw tap 47 has been installed, with as oily passage.Flow into the oil of this through hole 45H, through trickle groove (omitting diagram) that is formed at the above-below direction on the hole of inserting screw tap 47 die shanks and the leading section that arrives screw tap 47.

In the bottom of above-mentioned die shank body 37, the cylindrical workpiece presser feet 51 that normality is protruded to downside than above-mentioned screw tap 47 leading sections (bottom) can be installed flexibly rotatably by bearing.And, on the outer circumference surface of the upper end of above-mentioned die shank body 37, on the interior bulge 33 of above-mentioned anchor clamps tube 31, can from upside the cooperation ring 53 that can cooperate flexibly be installed with the relative rotation by bearing.

In addition, on the top of above-mentioned die shank body 37, be provided with the down maneuver transmission mechanism 55 that the down maneuver of above-mentioned slide block 5 is passed to above-mentioned screw tap clamp 45.In more detail, can only support the head knife bar 57 of tubular flexibly rotatably by bearing on the top of above-mentioned die shank body 37, in the large diameter hole 57H that is formed at these head knife bar 57 above-below directions, be provided with to flexible motion up and down the pressing lever 59 that be abutted against the upper surface of its lower surface and above-mentioned screw tap clamp 45 under the normality.On this pressing lever 59, formed the above-below direction through hole 59H that is communicated with flexibly with the through hole 45H of above-mentioned screw tap clamp 45, with as oily passage.

In the above-mentioned large diameter hole 57H of above-mentioned head knife bar 57, can embed the piston 61 that possesses as the above-below direction through hole 61H of axle center part oil passage flexibly with moving up and down, between this piston 61 and above-mentioned pressing lever 59, the elastomeric element 63 that the down maneuver of above-mentioned piston 61 is delivered to neatly the helical spring as an example of spring mechanism, rubber bodies etc. of above-mentioned screw tap clamp 45 by above-mentioned pressing lever 59 has been installed.The coefficient of elasticity of this elastomeric element 63, the coefficient of elasticity of the above-mentioned elastomeric element 49 that the above-mentioned screw tap clamp 45 of the comparison that is set pushes upward is little, above-mentioned elastomeric element 63, it has constituted when with the leading section of screw tap 47 impact absorption mechanism with absorption impact when the thread Pilot hole of workpiece W cooperates.

On the above-mentioned large diameter hole 57H top of above-mentioned head knife bar 57, can move up and down flexibly ground chimeric the pressure head portion parts 65 that above-mentioned piston 61 is pressed down flexibly.These pressure head portion parts 65, the a plurality of pilot pins 67 that uprightly are arranged on the above-mentioned head knife bar 57 have limited moving and quilt support flexibly upward with moving up and down, and plates such as the helical spring pressure of utilizing elasticity to be installed between these pressure head portion parts 65 and the above-mentioned head knife bar 57 applies normal pressure upward with elastomeric element 69.And,, be provided with the above-below direction diameter through hole 65H that can be connected with the mist of oil ejiction opening 5H on being arranged at above-mentioned slide block 5 and can be connected with the minor diameter through hole 61 on being arranged at above-mentioned piston 61 as the mist of oil passage at the axle center part of above-mentioned pressure head portion parts 65.

In structure as above, the same with common punch press, it utilizes the control of NC device 71 to carry out all actions of punch press, and the control motor M of above-mentioned rotary die indexing means 7 is possessed motor controlling organization 73 controls of direction of rotation switching mechanism 75.That is, when on rotary die indexing means 7 mold being installed, control motor M carries out the rotation control at intermittence with above-mentioned mold rotation calibration.And, when on above-mentioned rotary die indexing means 7, threading tool 35 being installed, can be with high speed rotation that is suitable for the screw tap 47 smear metal conditions that threading tool 35 possessed and the rotation that obtains to continue just to control above-mentioned control motor M with changeing, and when the tapping process finishing, can make control motor M is controlled to be reverse.

In addition, in above structure, when common mold is installed on rotary die indexing means 7, and when this rotary die indexing means 7 has determined the indexing position relative with slide block 5 lower positions, motor controlling organization 73, it is according to the instruction of NC device 71, can control the rotation of motor M off and on and mold is positioned the rotation control of desired angle-differentiated position.

When threading tool 35 being installed at above-mentioned rotary die indexing means 7, and this rotary die indexing means 7 determined with the relative indexing position of slide block 5 lower positions after, 47 pairs on the screw tap that utilizes threading tool 35 to be possessed takes shape in thread Pilot hole on the workpiece W in advance and carries out tapping processing.

Then, as shown in Figure 1, the block 17 that rotary die indexing means 7 possessed makes origin sensor 15 actions and is positioned at the origin position of direction of rotation at rotating cylinder 11, worm gear 13 etc., and slide block that punch press possessed 5 descends and be abutted against (state shown in Figure 1) with pressure head portion parts 65 after, when descending above-mentioned slide block 5 again, threading tool and anchor clamps tube are lowered by.

At this moment, are more weak springs owing to promote spring 27, so above-mentioned anchor clamps tube 31, threading tool 35 overcomes the pressure of above-mentioned lifting spring 27 and descends.

When anchor clamps tube 31 and threading tool 35 descend as mentioned above, be abutted against above the workpiece presser feet that the bottom possessed 51 of die shank body 37 and the workpiece W.When slide block 5 was descended a little again, above-mentioned workpiece presser feet 51 was by the pressure of above-mentioned elastomeric element 69, workpiece W pushed be fixed on the threading die that bed die 3 possessed.

Therefore, utilizing screw tap 47 tapping to add man-hour, workpiece W can not move, and can stably carry out tapping processing.

As mentioned above, when workpiece presser feet 51 is in workpiece W by the state that is pressed on the threading die, stop the decline of above-mentioned slide block 5, when the major diameter mist of oil ejiction opening 5H that is possessed from slide block 5 sprays mist of oil, oil flows down from the minor diameter through hole 61H of piston 61, and the fluid pressure between above-mentioned pressure head portion's parts 65 and the piston 61 rises gradually, and piston 61 is little by little descended.Therefore, as the above-mentioned piston 61 of the pressing mechanism that is used for screw tap clamp 45 is pushed downwards, overcome the pressure of elastomeric element 49 and above-mentioned screw tap clamp 45 is pushed downwards by spring members 63, pressing lever 59.Therefore, the leading section (bottom) of the screw tap 47 that possessed of screw tap clamp 45 lower ends cooperates with the thread Pilot hole that is pre-formed on workpiece W.

As mentioned above, when the front end of screw tap 47 in state that workpiece W thread Pilot hole cooperates the time, under the control of said motor controlling organization 73, make above-mentioned control motor M just to change at a high speed and screw tap 47 is just being changeed.

But,, also can replace with from the action of the mist of oil ejiction opening 5H ejection mist of oil of above-mentioned slide block 5, and carry out following action as the action that the leading section with screw tap 47 cooperates with workpiece W thread Pilot hole.Promptly, be under the state of pushing fixation workpiece W at above-mentioned workpiece presser feet 51, when descending again with above-mentioned slide block 5 declines and with pressure head portion parts 65 again, spring members 63 is in further compressed state by piston 61, and screw tap clamp 45 utilizes this spring members 63, pressing lever 59 to overcome the pressure of elastomeric element 49 and descend.

And, the leading section of the screw tap 47 that is possessed when screw tap clamp 45 is when being pre-formed thread Pilot hole on workpiece W and cooperating, stop the decline of above-mentioned slide block 5, utilize motor controlling organization 73 to begin to control the just commentaries on classics of motor M simultaneously, and screw tap 47 just changes at high speed with the revolution that is fit to the smear metal condition.

In addition, whether screw tap 47 leading sections cooperate with the thread Pilot hole of workpiece W, for example can be used to make the actuator load change of slide block 5 declines or the decline of detection beginning slide block 5 and the methods such as setting-up time that process is set suitably to detect with detection.In addition, when the moment that screw tap 47 leading sections have cooperated with the thread Pilot hole of workpiece W, above-mentioned elastomeric element 63 just absorbs as the function of impact absorption mechanism and impacts, and screw tap 47 fractures when preventing above-mentioned cooperation.

As mentioned above, under screw tap 47 leading sections and state that the thread Pilot hole of workpiece W cooperates, control motor M is just to change at a high speed, when screw tap 47 is just changeing at a high speed with the revolution that is fit to the smear metal condition, the thread Pilot hole of screw tap 47 wedging workpiece W automatically advances decline Yi Bian screw tap 47 one side double thread bottom outlets carry out tapping processing.

At this moment, mist of oil ejiction opening 5H ejection mist of oil from above-mentioned slide block 5, flow down and be directed into screw tap 47 by the through hole that is located at the conduct oil passage on pressure head portion parts 65, piston 61, pressing lever 59 and the screw tap clamp 45 respectively, when carrying out screw tap 47 cooling, also be directed into the sliding part of above-mentioned pressure head portion parts 65, piston 61, pressing lever 59 and screw tap clamp 45 and play lubricating function.Therefore, can prolong 47 life-spans of screw tap and realize the slyness action of each sliding part.

When just changeing and beginning tapping, above-mentioned screw tap 47 adds man-hour, because changeing, each of screw tap 47 all use block 17 to make origin sensor 15 actions, so actuating signal at the above-mentioned origin sensor 15 of motor controlling organization 73 statistics, and when the actuating signal of origin sensor 15 is exported, utilize turn-sensitive device 19 to detect the rotation of control motor M, can detect the inlet of 47 couples of workpiece W of screw tap thread Pilot hole with this.In addition, utilize above-mentioned turn-sensitive device 19 to detect the revolution that also can detect above-mentioned screw tap 47 from the structure of the control motor M revolution of above-mentioned control motor M rotation zero hour.

And, utilize to detect above-mentioned control motor M from beginning just changeing stipulated time of process, also can detect above-mentioned screw tap 47 revolution roughly.

Therefore, in the direction of rotation switching mechanism 75 that said motor controlling organization 73 is possessed, whether whether detect (judgements) control motor M rotated the regulation revolution or has passed through the stipulated time from beginning just changeing from the positive turn-off beginning, be converted to when reverse when the just commentaries on classics that stops above-mentioned control motor M according to this judgement and with direction of rotation, screw tap 47 just retreats and extracts from workpiece W thread Pilot hole.

After aforesaid screw tap 47 is extracted from workpiece W thread Pilot hole, utilize above-mentioned slide block 5 to rise and restore to original position, each parts such as anchor clamps tube 31, die shank body 37 and pressure head portion parts 65 are restored to original state.In addition, under the control of NC device 71, when stopping screw tap 47 and just changeing, stop the ejection of mist of oil from the mist of oil ejiction opening 5H of slide block 5.

As from the foregoing, in the present embodiment, owing to can utilize motor controlling organization 73 neatly to being used to rotate the control motor M of rotary die indexing means on the punch press, control when carrying out common rotary die calibration and carry out the control that tapping adds man-hour is so can easily use the tapping processing of rotary die indexing means.

And, owing to be under the leading section of screw tap 47 and state that the thread Pilot hole of workpiece W cooperates, to make screw tap 47 just then begin to carry out tapping and process, so begin the wedging of screw tap 47 double thread bottom outlets when beginning that screw tap 47 is just being changeed, the management processing that carries out double thread bottom outlet thread turns easily promptly carries out the control of screw tap 47 double thread bottom outlet inlets easily.

In addition, change threading tool 35 owing to can on rotary die indexing means 7, load and unload ground flexibly, so can change common mold and threading tool 35 with respect to rotary die indexing means 7 loading and unloading ground, and can realize effective utilization of rotary die indexing means 7.

And,, process so can suitably carry out the tapping of double thread bottom outlet because motor controlling organization 73 possesses and is used for adding the direction of rotation switching mechanism 75 of just changeing and be converted to reverse that stops to control motor M man-hour in tapping.

Below, other embodiment of threading tool of the present invention are described with reference to Fig. 2.In addition, with threading tool 35 identical construction, on Fig. 2, intactly the symbol of Fig. 1 is added 100 according to Fig. 1 explanation.In addition, omit explanation, only according to both difference explanation structures to same configuration.

Above-mentioned threading tool 35, it utilizes bearing 87 to link with above-mentioned head knife bar 57 and above-mentioned die shank body 37 rotatably flexibly mutually.On the other hand, threading tool 100 shown in Figure 2, it utilizes threaded portion 187 to be threaded and to be fixed with head knife bar 157 and die shank body 137.Therefore, above-mentioned head knife bar 157 and above-mentioned die shank body 137 are set as one, and rotation integrally.

On the other hand, pressure head portion parts 165,165a, 165b are integrally fixed, and can be entrenched in slidably in the oil cylinder portion of above-mentioned head knife bar 157 flexibly along the vertical direction.Therefore, above-mentioned pressure head portion parts 165,165a, 165b also can be with above-mentioned head knife bar 157 and the 137 whole rotations of above-mentioned die shank body.

And, on above-mentioned pressure head portion parts 165,165a, 165b, be provided with non-rotating pressure head 181 by thrust bearing 179.At this moment, above-mentioned non-rotating pressure head 181, it utilizes above-mentioned thrust bearing 179, can relatively rotate with above-mentioned pressure head portion parts 165,165a, 165b.In other words, even above-mentioned head knife bar 157, above-mentioned die shank body 137, above-mentioned pressure head portion parts 165,165a, 165b are in rotation status, it can static above-mentioned slide block 5 remain static rotatably with not rotating yet.

In addition, on above-mentioned non-rotating pressure head 181, the above-mentioned pressure head parts 165b of portion, be made like through hole 165H with above-mentioned threading tool 35.

Then, have on the above-mentioned piston 61 of above-mentioned threading tool 35, formed aforesaid through hole 61H, but on the piston 161 of above-mentioned threading tool 100, do not formed through hole with present embodiment.At this moment, flow through above-mentioned through hole 165H's and the mist of oil that has been compressed, push above-mentioned piston 161, simultaneously, by around this piston 161 and gap between above-mentioned head knife bar 157 inwalls.Therefore, in order to make above-mentioned mist of oil, around above-mentioned piston 161, be not arranged on O type ring (rubber gasket of O word shape) set on the above-mentioned piston 61 with above-mentioned threading tool 35 easily by above-mentioned gap.

According to said structure, threading tool 100 in being inserted into rotating cylinder shown in Figure 1 11 and anchor clamps tube 31, descend by slide block 5, and when bottom and workpiece W are abutted against, be entrenched in the key 39 of keyway 141a by insertion, above-mentioned die shank body 137, above-mentioned head knife bar 157, above-mentioned pressure head portion parts 165, also whole together rotation of 165a, 165b by above-mentioned rotating cylinder 11.Therefore, above-mentioned non-rotating pressure head 181, workpiece presser feet 151, and cooperate ring 153 not to be rotated into inactive state.And above-mentioned threading tool 100 is in the effect of above-below direction because it is identical with above-mentioned threading tool 35, in this omission to its explanation.

Above-mentioned threading tool 100 according to present embodiment, when the operator inserts above-mentioned rotating cylinder shown in Figure 1 11 and anchor clamps tube 31 with above-mentioned threading tool 100, even holding the operation of above-mentioned head knife bar 157 ground, because above-mentioned die shank body 137 does not rotate, can cooperate with the position of above-mentioned key 39 above-mentioned keyway 141a and insert, so can realize the high efficiency of assembly operation.

In addition, according to the foregoing description, the symbol 163 among Fig. 2 with embodiment illustrated in fig. 1 identical, is a helical spring, even but it is replaced into the duct member of tubular and its assembling also can be obtained same effect.

Below, with reference to the tapping processing unit (plant) (chasing bar) of the description of drawings embodiment of the invention.

As shown in Figure 3, the tapping processing unit (plant) of the embodiment of the invention has: possess be used for to the thread Pilot hole of having processed on the workpiece W carry out the tapping assembly 203 of the screw tap 201 of tapping, in the face of the screw tap mould 205 (chasing bar) of above-mentioned screw tap 201 and supporting workpiece W.

Above-mentioned tapping assembly 203, possess the die shank body 209 that makes the drum that the screw tap clamp 207 that keeps above-mentioned screw tap 201 can only move up and down flexibly has been installed in inside, at the leading section (bottom on Fig. 3) of this die shank body 209, have can rotate flexibly above-mentioned workpiece W is pressed in neatly cylindrical workpiece presser feet 211 on the screw tap mould 205.

Above-mentioned die shank body 209 on the tapping assembly 203, it can be moved up and down flexibly and can for example be supported in rotatably on the tubular rotary body 215 that can rotate flexibly that the upper clamp 213 at turntable punch press top turntable etc. possessed with rotary body 215 integral body.In order to make above-mentioned rotary body 215 rotations, be provided with rotary transfer machine 217 on the top of this rotary body 215, closing at these rotary transfer machine 217 Shang Nogami and utilizing the tapping rotation that constitutes by servo motor worm screw (omitting diagram) with motor (on Fig. 3, omitting diagram) rotation as worm gear.That is, above-mentioned rotary body 215 can utilize the tapping rotation just to change, reverse with motor.

For above-mentioned die shank body 209 and screw tap 201 being moved up and down, be provided with screw tap and move with actuator (on Fig. 3, omitting diagram) in the face of above-mentioned rotary body 215.Move as above-mentioned screw tap and to use actuator, for example install on punch press and when using tapping assembly 203, it is equivalent to be used to make for example hydraulic jack that the slide block (pressure head) 219 on the punch press moves up and down etc.

According to said structure, when utilizing the screw tap rotation to make rotary body 215 rotations with motor, and make screw tap move with actuator action and with above-mentioned die shank body 209 when above-mentioned screw tap mould 205 directions (below on Fig. 3) are mobile, be installed on screw taps 201 and rotary body 215 in the die shank body 209, the 209 whole rotations of die shank body and move to this direction.

And, the workpiece presser feet 211 that is possessed when die shank body 209 leading sections is pressed in workpiece W on the screw tap mould 205 and when stopping above-mentioned die shank body 209 mobile, screw tap 201 relatively moves with this die shank body 209, and the thread Pilot hole of the front end wedging workpiece W of screw tap 201 carries out tapping processing on above-mentioned thread Pilot hole.In addition, because screw tap 201 and the structure that this die shank body 209 relatively moves can be well-known structures, so omit the detailed description of this structure.

As mentioned above, after the thread Pilot hole at workpiece W has carried out tapping processing, rotation is reversed and when making screw tap 201 counter-rotatings, screw tap 201 can move with leaving from the thread Pilot hole of workpiece W with motor, and die shank body 209 is returned the origin-location, and restPose.

Above-mentioned screw tap mould 205, it is oriented on the lower clamp 221 of lower turntable etc. that above-mentioned tapping assembly 203 ground are installed in turntable punch press for example.This screw tap mould 205, having with above-mentioned workpiece presser feet 211 faces and makes the annular work piece support portion 223 of supporting workpiece W to protrude the outer cylinder body 225 that is possessed, in this outer cylinder body 225, possesses the movable block 227 that can utilize above-mentioned screw tap 201 leading sections that connect above-mentioned workpiece W to carry out push action flexibly movably.

In more detail, above-mentioned movable block 227, be the piston that can be flexibly embeds in the above-mentioned outer cylinder body 225 with moving up and down, and utilize the cover 229 that is installed on the above-mentioned outer cylinder body 225 and the elastic force of the elastomeric elements such as spring 231 between this movable block 227 that above-mentioned workpiece support section 223 sides are applied normal pressure.

On workpiece support section 223 side end faces on the above-mentioned movable block 227, possesses the protuberance 235 that embeds neatly in the through hole 233 that is formed on above-mentioned workpiece support section 223 central portions, with the end face of above-mentioned workpiece support section 223 side end face opposition sides on, have the cylindrical portion 237 that can run through above-mentioned cover 229 flexibly slidably.And,, formed and discharged tapping and add the communication passage 241 of hole that the tap 239 that produces man-hour such as smear metal etc. and above-mentioned protuberance 235 end face sides are communicated with, groove etc. in the many places of above-mentioned protuberance 235.

And, on the periphery of above-mentioned movable block 227, formed because of the screw tap 201 that has run through workpiece W and be pressed when descending, the circumferential groove 243 that is communicated with air scoop 245 on being formed at above-mentioned outer cylinder body 225 is being communicated with the intercommunicating pore 247 (air squit hole 247) that is communicated with the space 46 that has disposed above-mentioned elastomeric element 231 on this circumferential groove 243.And, above-mentioned space 46, it is in communication with the outside by the hole 229H that is located on the above-mentioned cover 229.

Above-mentioned air scoop 245 is connected with pressure source 249, is connecting on the interface channel 251 of this air scoop 245 and pressure source 249, is provided with as the pressure sensor 253 that is used to detect the example of sensor whether above-mentioned circumferential groove 243 and air scoop 245 connect.In addition, as the air scoop 245 that connects above-mentioned outer cylinder body 225 and the structure of above-mentioned interface channel 251, be preferably in the circumferential groove corresponding with above-mentioned interface channel 251 is set on the outer circumference surface of above-mentioned outer cylinder body 225.

At the control device 255 that is used to control above-mentioned tapping processing unit (plant), as shown in Figure 4, connected above-mentioned pressure sensor 253, and connected be used to rotate above-mentioned screw tap 201 the screw tap rotation with motor 275 and the tapping that is used to move up and down above-mentioned tapping assembly 203 move with actuator 259 (when being when utilizing slider of punch to make the structure that the tapping assembly moves up and down, it is equivalent to actuator that slide block is moved up and down).

In addition, on control device 255, has the fracture sensor states MA monitoring agency 263 of decision mechanism 261 and above-mentioned pressure sensor 253 states of screw tap that supervision fractures according to the above-mentioned screw tap 201 of the input-signal judging of above-mentioned pressure sensor 253.

In above structure, when making the screw tap rotation just change, make screw tap 201 just changeing with motor 257 under the control of above-mentioned control device 255 and making tapping move with actuator 259 actions, make tapping assembly 203 when screw tap clamp 207 directions begin to move (beginning tapping processing) (step S201), sensor states MA monitoring agency 263 monitors the state (step S202) of above-mentioned pressure sensor 253.

Under the original state of tapping processing beginning, movable block 227 is in the effect that utilizes elastomeric element 231 and is shown the state of having pressed, circumferential groove 243 around the movable block 227 is in notconnect state with the air scoop 245 of outer cylinder body 225, and interface channel 251 internal pressures are in keeps high pressure conditions and pressure sensor 253 is in the ON state.Therefore, under original state, when pressure sensor 253 is OFF, can detect fault (step S203) into pressure sensor 253.

And, utilize supervision to pressure sensor 253, can for example detect the fault of air supply system.Or detect the fault whether movable block 227 on the screw tap mould 205 has returned to normal position etc.Therefore, in step 3, utilize supervision, can understand the uncomfortable state of pressure sensor 253, air supply system or screw tap mould 205, can take precautions against fault man-hour in possible trouble adding pressure sensor 253.

As mentioned above, add man-hour with the beginning tapping when screw tap 201 just being changeed and descending, above-mentioned workpiece presser feet 211 workpiece W is pushed be fixed on the workpiece support section 223 after, the thread Pilot hole of workpiece W is carried out tapping processing.And, on the above-mentioned decision mechanism 261 that fractures, judgement begins at the appointed time the state of pressure sensor 253 whether change (variation of detected value) (step S204) from tapping processing, when the detected value of pressure sensor 253 does not change at the appointed time, can detect the state (step S205) that fractures and fracture of screw tap 201, and carry out improper stopping (step S206) as screw tap 201.

Promptly, when screw tap 201 fractures, owing to can not carry out the wedging of 201 couples of workpiece W of screw tap thread Pilot hole, and can not connect workpiece W and push action piece 227, so the circumferential groove 243 of movable block 227 can not be connected with the air scoop 245 of outer cylinder body 225, and interface channel 251 internal pressures have been kept high pressure, and pressure switch 253 (pressure sensor 253) is held the ON state.And, when can not detecting too during regular event because of the movable blocks 227 such as abnormality of contact section wearing and tearing of screw tap 201 with movable block 227.

When screw tap 201 does not fracture, the thread Pilot hole of screw tap 201 wedging workpiece W, and connect workpiece W and be abutted against with the protuberance 235 with movable block 227, thereby the elastic force that overcomes elastomeric element 231 is depressed movable block 227.As mentioned above, when movable block 227 is depressed, when the circumferential groove 243 of movable block 227 is communicated with the air scoop 245 of outer cylinder body 225, because the air in the interface channel 251 flow in the circumferential groove 243, interface channel 251 internal pressures have been reduced, so pressure sensor 253 is changed to the OFF state.

Therefore, when detecting the state variation of stipulated time pressure sensor 253 (step S207), be judged as normally, and remain in operation (step S208).Then, when utilizing screw tap 201 to descend to have carried out tapping to add man-hour, stop the rotation (step S209) of screw tap 201 to the thread Pilot hole of workpiece W.

Afterwards, make the screw tap rotation reverse and make screw tap 201 counter-rotatings (step S210) with motor 257.Under the state of beginning screw tap 201 counter-rotatings, carry out the judgement (step S211) whether pressure sensor 253 is in the OFF state, when being ON, then detecting and be sensor fault (step S212).In addition, even movable block 227 is in the action that does not set back when bad, can detect too.

Whether judgement changes (step S213) from the state of the stipulated time pressure sensor 253 that screw tap 201 begins to reverse, and detects to fracture (step S214) for screw tap 201 when not changing, and promptly stops (step S15).Promptly, when screw tap 201 is extracted from workpiece W, because the state that be abutted against in the protuberance 235 with movable block 227 front end of screw tap 201, utilize elastomeric element 231 to stop the rising of movable block 227, the state that has kept the circumferential groove 243 of connecting moves piece 227 to be communicated with the air scoop 245 of outer cylinder body 225, so pressure sensor 253 keeps the state of OFF, can detect fractureing of screw tap 201.In addition, when the action that can not set back at movable block 227 is bad, can detect too.

When screw tap 201 does not fracture, when screw tap 201 rises, movable block 227 is with regard to the effect that utilizes elastomeric element 231 and rise, the circumferential groove 243 that cuts off movable block 227 is communicated with the air scoop 245 of outer cylinder body 225, pressure in the interface channel (continuous passage) 251 is risen, and pressure sensor 253 is changed to the ON state.

Thereby, detecting pressure sensor 253 when being in the ON state (step S216), as normal and continuous running (step S217) stops the reverse (step S218) of screw tap 201 subsequently, to restPose.

As existing understanding, when pressure sensor 253 is an OFF state or when the OFF state variation is the ON state from the ON state variation, owing to utilize sensor states MA monitoring agency 263 to monitor the state of pressure sensor 253, so when sensor is out of order, can detect sensor fault.

But, in said structure, explanation be the intercommunicating pore 247 that will be provided with movable block 227, the structure that is communicated with the interior spatial portion of having adorned elastomeric element 231, but suppose shown in the line as Fig. 3, preferably with above-mentioned intercommunicating pore 247, the structure that points to tap 239 belows of cylindrical portion 237 and be communicated with it.

As mentioned above, utilization is set to point to tap 239 belows of cylindrical portion 237 and the state that tilts with intercommunicating pore 247, when the leading section push action piece 227 that utilizes screw tap 201 makes its decline and circumferential groove 243 be communicated with air scoop 245, can point to tap 239 belows and spray air from intercommunicating pore 247.Thereby, produce negative pressure on the top of tap 239, can attract atmosphere from the communication passage 241 that is located on the protuberance 235.Therefore, add the smear metal that produces man-hour with screw tap 201 tapping and be attracted, and discharge through tap 239 by above-mentioned communication passage 241.

As existing understanding, the tap 239 of cylindrical portion 237 plays the effect of discharging smear metal, above-mentioned intercommunicating pore 247 becomes the below of pointing to tap 239 and the air spray orifice that sprays air, the air that utilization sprays in tap 239 from this air spray orifice produces the effect that is attracted atmosphere by communication passage 241, can discharge tapping effectively and add the smear metal that produce man-hour.

Below, with reference to Fig. 7～Figure 10, other embodiment of screw tap mould of the present invention are described.In addition, for screw tap mould 5 identical construction according to Fig. 3 explanation, be that the symbol that will add on Fig. 3 intactly adds 300 and add on Fig. 7～Figure 10.And omit the explanation of same configuration, both differences only are described.

On above-mentioned screw tap mould 5, when above-mentioned movable block 27 descends, below the above-mentioned workpiece support section 23 of above-mentioned outer cylinder 25 (the inside) and above the above-mentioned movable block 27 between can form the space.Therefore, because compressed air do not flow into this space, the smear metal (chip) that tapping processing produces enters this space, and the recovery of can not fully rising of above-mentioned movable block 27 takes place.Therefore, at present embodiment, its purpose is to constitute the structure that compressed air can flow into this space.Below, with reference to accompanying drawing, the structure of this improvement invention is described.

As Fig. 7～shown in Figure 10, formed the groove 343 of ring-type in the upper portion of exterior cylinder 325 inner peripherys of present embodiment screw tap mould 300.And, on its exterior cylinder 325, connect and formed air scoop 345, and form the flow channel that is communicated with above-mentioned groove 343 and above-mentioned air scoop 345 and to the pod 371 of longitudinal extension.

In the inside of above-mentioned exterior cylinder 325, the same with above-mentioned screw tap mould 5, be provided with the movable block 327 that can slide flexibly along the vertical direction.Thereby, when above-mentioned screw tap 1 descends and push above-mentioned movable block 327 downwards, can form the space at the inner wall part of above-mentioned exterior cylinder 325 (be equivalent to above-mentioned workpiece support section 23 shown in Figure 3 below the wall of (the inside)) and between above the above-mentioned movable block 327.And the air of flow through above-mentioned air scoop 345, above-mentioned pod 371, above-mentioned groove 343 flows into this space.

On the other hand, as shown in figure 10, on above-mentioned movable block 327, chimeric shaft-like block 381.Above-mentioned block 381, it can be across the cylindrical wall of above-mentioned movable block 327 ground by chimeric.Therefore, the space of above-mentioned block 381 both sides, that is, above-mentioned block 381 and the shared space in addition of the cylindrical wall of above-mentioned movable block 327, direction is passed through air up and down.And, formed the screw tap that protrudes upward at the central portion of above-mentioned block 381 and born the 381a of portion.

In said structure, when above-mentioned screw tap 1 descends and bears with above-mentioned screw tap that the 381a of portion is abutted against and above-mentioned movable block 327 when being pressed towards the below, can form the space at the inner wall part of above-mentioned exterior cylinder 325 (and above-mentioned workpiece support section 23 shown in Figure 3 below (the inside) suitable wall) and between above the above-mentioned movable block 327.And the air via above-mentioned air scoop 345, above-mentioned pod 371, above-mentioned groove 343 flows into this space.Utilize above-mentioned air to flow into this space, then can dispel the above-mentioned movable block 327 and the above-mentioned smear metal (chip) above the above-mentioned block 381 that are deposited in down position downwards, and clean this above-mentioned movable block 327 and above-mentioned block 381 above.Therefore, when screw tap descended end and 1 rising of above-mentioned screw tap, the inner wall part of the top and above-mentioned exterior cylinder 325 of above-mentioned movable block 327 can closely contact, and rising returns to the origin-location.

In addition, the above-mentioned exterior cylinder 325 of present embodiment, as shown in Figures 7 and 8, its cylindrical shell extends downwards.And, put in this right position of extending cylindrical shell downwards, formed a plurality of through holes 375 that air flows into that are used for.These through holes 375, it is formed along with entering to the inside downwards.These a plurality of through holes 375 are communicated with by circumferential groove 377.

To be formed at the air process above-mentioned circumferential groove 377 of air after passage 379 compressions on the above-mentioned lower clamp 221 (Fig. 3), flow into above-mentioned all a plurality of through holes 375, and this air flow into the lower space 387 of above-mentioned exterior cylinder 325 again.

Because air flows into above-mentioned lower space 387, and this air sprays downwards, so the periphery of the upper space 385 of above-mentioned exterior cylinder 325 is in the negative pressure state near vacuum.Utilize this negative pressure state, can will be piled up in above-mentioned movable block 327 and attract downwards, promoted the scavenging action of this smear metal (chip) with the above-mentioned smear metal (chip) that the top of above-mentioned block 381 and quilt are dispelled.

In addition, with reference to Japan's patent application 2002-312811 number (application on October 28th, 2002) reach with patent application 2003-039705 number (application on February 18th, 2003), its full content is mixed together in specification of the present invention.

The present invention is not limited to the foregoing description, utilizes suitable change, can obtain the enforcement with other forms.

Claims (15)

1. A tapping method, the method for tapping on a punch press comprises the following steps: (a) The process of fitting the front end of the tap provided by the tapping tool mounted on the rotary die indexing device that can rotate flexibly in the punching machine with the threaded bottom hole provided on the workpiece, (b) When the front end of the tap is in the state of engaging with the threaded bottom hole, the tap is rotated forward, and the control motor of the rotary mold indexing device is rotated forward, (c) When it is detected that the control motor of the rotary mold indexing device has rotated by a predetermined number of revolutions, the forward rotation of the control motor is stopped and the reverse rotation is performed to disengage the tap from the screw bottom hole. 2. A tapping method, the method for tapping on a punch press comprises the following steps: (a) The process of fitting the front end of the tap provided by the tapping tool mounted on the rotary die indexing device that can rotate flexibly in the punching machine with the threaded bottom hole provided on the workpiece, (b) When the front end of the tap is in the state of engaging with the threaded bottom hole, the tap is rotated forward, and the control motor of the rotary mold indexing device is rotated forward, (c) When it is detected that the control motor of the rotary mold indexing device starts to rotate and a predetermined time has elapsed, the process of stopping the forward rotation of the control motor and reverse rotation to disengage the tap from the thread bottom hole. 3. A tapping device, comprising: The tap fixture installed in the cutter bar body on the rotating mold indexing device that can flexibly rotate up and down in the punch press has a tap at the lower end and is set to move up and down flexibly, and the tap holder being spring-loaded upwards, and The lowering action transmission mechanism used to transmit the lowering action of the slide block capable of flexibly moving up and down of the punching machine to the tap holder is a lowering action transmission mechanism provided on the upper part of the cutter bar body. 4. The tapping device according to claim 3, characterized in that: A workpiece presser foot that can rotate flexibly is provided at the lower end of the cutter bar body. 5. The tapping device according to claim 4, characterized in that: An oil flow passage for guiding oil supplied from the slider to the tap is provided on the lowering motion transmission mechanism and the tap holder. 6. The tapping device according to claim 5, characterized in that: An elastic mechanism capable of flexibly overcoming the upward elastic force on the tap holder and transmitting the lowering action of the slider that should lower the tap holder is provided on the lowering motion transmission mechanism. 7. A tapping device, comprising: The tap fixture installed in the cutter bar body on the rotating mold indexing device that can flexibly rotate up and down in the punch press has a tap at the lower end and is set to move up and down flexibly, and the tap holder being spring-loaded upwards, and used to transmit the descending action of the slider capable of flexibly moving up and down of the punch press to the descending action transmission mechanism of the tap clamp, In the above configuration, the lowering motion transmission mechanism includes a pressing mechanism for pressing the tap holder downward by fluid pressure supplied from the slider and a shock absorbing mechanism. 8. The tapping device according to claim 7, characterized in that: A workpiece presser foot that can rotate flexibly is provided at the lower end of the cutter bar body. 9. The tapping device according to claim 8, characterized in that: An oil flow passage for guiding oil supplied from the slider to the tap is provided on the lowering motion transmission mechanism and the tap holder. 10. The tapping device according to claim 9, characterized in that: An elastic mechanism capable of flexibly overcoming the upward elastic force on the tap holder and transmitting the lowering action of the slider that should lower the tap holder is provided on the lowering motion transmission mechanism. 11. A punching machine provided with a rotary die indexing device for rotating the die, comprising: a control motor for rotationally driving said rotary mold indexing device, and The motor control mechanism of the control motor can be flexibly controlled according to the rotation index of the rotary mold and the tapping process with the tapping tool installed on the indexing device of the rotary mold. 12. The punch press according to claim 11, characterized in that: The motor control mechanism has a rotation direction changer for stopping the forward rotation of the control motor and switching to reverse rotation when it is detected that the control motor starts to rotate forward and rotates a predetermined number of times or a predetermined time elapses. mechanism. 13. A threading device comprising: A tap die that faces a tap for tapping a threaded bottom hole formed on a workpiece and supports the workpiece, The action block provided on the tap die is an action block that operates due to the tap passing through the workpiece, A sensor for detecting the action of the action block, and a sensor monitoring mechanism for monitoring the state of the sensor. 14. A tapping device comprising: A tap die that faces a tap for tapping a threaded bottom hole formed on a workpiece and supports the workpiece, an action block provided on the tap die, which is an action block that operates due to the tap passing through the workpiece, and The air ejection hole for ejecting air from the discharge hole in the action block when the action block is in motion. 15. The tapping device according to claim 14, characterized in that: The air ejection hole points to the discharge direction of the discharge hole.

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