JPH05111803A - Cutting work device and cutting method - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a cutting apparatus and a cutting method for cutting an end surface and an outer peripheral surface of an assembled component on the same tool post table. [Structure] The setting attachment portion 7 of the assembly component 1 is held by a chuck 20 attached to a slidable sleeve provided on a jig base 2 and a sleeve 12 is moved in an axial direction to a kele pin 25 attached to a spindle 3. The engagement hole 30 formed in the cylinder portion 6 of the assembly component 1 is engaged, and the rotation of the main shaft 3 causes the cylinder portion 6 to rotate.
To rotate. In order to align the engaging hole 30 with the kele pin 25, the movement of the sleeve in the axial direction is stopped halfway by the stopper means, and the movement of the sleeve to the main shaft 3 side is restricted by the stopper means in the engaged state. The thrust force in the axial direction does not act on the cylinder portion 6, only the rotational force is applied to the cylinder portion 6 by the main shaft 3, and the end face of the cylinder portion 6 is cut and the outer peripheral surface is lead-processed to improve the working accuracy, Perform accurate lead processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device and a cutting method for cutting an end surface and an outer peripheral surface of a cylinder portion of a shaft portion in an assembly part composed of a relatively rotatable shaft portion and a setting attachment portion, In particular, the present invention relates to a cutting device and a cutting method for cutting a lead serving as a guide for tape running on a reference surface of a product and an outer peripheral surface of an end surface of a cylinder part such as an 8 mm VTR.

[0002]

2. Description of the Related Art Conventionally, as a collet chuck for a work piece, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 63-91311. The work collet chuck includes a collet sleeve that is slidably mounted on a base body, a collet that is slidably inserted into the collet sleeve, and a forward movement that biases the collet in the forward direction relative to the base body. Spring and a clamping spring that biases the collet sleeve in the forward direction against the collet so as to close the collet, and between the collet sleeve and the collet, the collet sleeve resists the clamping spring against the collet. There is provided a collet opening / closing space which can be retracted by means of the collet sleeve, and an engagement means which engages with each other when the collet sleeve is retracted. Then, a drive pin is elastically protruded and attached to the tip of the rotary spindle at an eccentric position, the drive pin is elastically inserted into a hole formed in the workpiece to rotate the workpiece, and the workpiece is rotated. One end of the shaft portion is attached to the clamp rest with a spring and a screw, and the other end is attached by being pressed by the spring force of the collet.

Further, as an apparatus for turning assembled parts, there is one disclosed in Japanese Patent Application Laid-Open No. 2-59203. The turning device for the assembled parts is a VTR, 8 mm VTR, D
A curved turning process such as a lead process is performed on an assembly component composed of a relative rotating member such as an AT. The structure is such that one end portion of the shaft member in the assembly component composed of a relatively rotatable shaft member and an outer member is A first holding portion that supports, a second holding portion that can move forward and backward with respect to the first holding portion and that supports the other end of the shaft member, and the outer member that is rotatably arranged on the first holding portion. And a main shaft means for imparting a rotational movement necessary for turning, and a driver means attached to the first holding portion and imparting a rotational movement to the shaft member.

Further, as an NC cutting apparatus, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Laid-Open No. 88102. The NC cutting device is capable of performing lead processing such as a lead shape that serves as a guide during tape running on a VTR cylinder at high speed, and is fixed on an NC-controlled XZ moving table and machined. Spindle means incorporating a servomotor that gives rotation necessary for cutting an object, clamp means for holding and positioning a workpiece provided on the spindle means, and fixing set at a position facing the workpiece held by the clamp means A table, a cutting tool post attached to the fixed table and capable of reciprocating independently of the workpiece, and a servomotor fixed to the fixed table and reciprocating the cutting tool post. is there.

Further, Japanese Patent Laid-Open No. 2-180503 discloses a tool post device for lead machining and an NC lead machining device using the tool post device. The tool post device for lead processing reciprocates a tool attachment slide at high speed, and includes a servo motor fixed to a table, a male screw formed on a rotary shaft integrally formed with a drive shaft of the servo motor, and a male screw. A nut member that fits and reciprocates according to the rotational movement of the rotary shaft, a blade mounting slide fixed to the nut member and having a blade mounted at one end, and the blade mounting slide is mounted on a slide base fixed to the table by air. It is supported so as to be reciprocally slidable via a bearing. Further, the NC lead processing apparatus is capable of performing lead processing such as a lead shape which serves as a guide during tape running on the VTR cylinder at high speed.

[0006]

However, in the collet chuck for a workpiece disclosed in Japanese Utility Model Laid-Open No. 63-91311, the drive pin that gives a rotational force to the workpiece is only the rotational force with respect to the workpiece. However, since the structure is such that thrust force is also applied by elastic force, the axial position of the workpiece is always held in an unstable state, and when machining the outer surface of the workpiece, high accuracy is required for axial machining. It has the problem that it cannot be expected. Also, when fixing the shaft of the workpiece, one end of the shaft of the workpiece is attached to the clamp rest with a screw and a spring, and the other end is pressed by the spring force of the collet to attach it. Since the tool is biased in the axial direction of the workpiece, there is a problem that there is always instability in the holding state of the workpiece in the axial direction, and high accuracy cannot be expected in the machining accuracy in the axial direction of the workpiece. is doing.

Further, the present applicant has developed a tailstock device for a precision lathe, and has filed an application of Japanese Patent Application No. 2-632 before the filing of this application.
I am applying for No. 11. The tailstock device is used by disposing the tailstock on a lathe bed and fixing the tailstock on the lathe bed at an arbitrary position from the end face of the lathe spindle, and is used for the upper surface of the lathe bed. While forming a bed portion by protruding, to form a convex portion by protruding the lower surface of the frame of the tailstock, forming a space between the side surface of the bed portion and the side surface of the convex portion, A side surface of the convex portion is formed into a tapered surface, and a taper gib having a tapered surface that press-contacts the tapered surface is slidably mounted in the space portion, and the convex portion is press-contacted to the bed portion via the taper gib. The tailstock is fixed in the state and the tailstock is fixed on the lathe bed. Furthermore, in this tailstock device, a tailstock is arranged on a lathe bed, and the tailstock is used by fixing the tailstock on the lathe bed at an arbitrary position from the end face of the lathe spindle. The upper surface of the lathe bed is projected to form opposing bed portions, and the lower surface of the frame of the tailstock is projected so as to be inserted between the inner side surfaces of the respective bed portions to form a convex portion. Both end surfaces of the convex portion facing the side surface are formed into tapered surfaces, and a taper gib is slidably mounted in each of the two space portions formed by the inner side surface and the side end surface, and the taper gib is interposed therebetween. The convex portion is fixed to the inner surface in a pressure contact state, and the tailstock is fixed on the lathe bed.

Therefore, an object of the present invention is to solve the above-mentioned problems, and a lead is formed on the outer peripheral surface of the cylinder portion of the shaft portion with respect to the assembly component composed of the relatively rotatable shaft portion and the setting attachment portion. Regarding the cutting device and the cutting method for processing such as etc., while fixing the setting attachment part with the chuck of the jig base equipped with the reference block, stop the chuck of the jig base temporarily before the kere pin provided on the spindle. Then, the cylinder portion is rotated so as to be aligned with the engagement hole formed in the cylinder portion of the shaft portion, and then the chuck is advanced to engage the kele pin with the engagement hole and thrust the cylinder portion in the axial direction. It is rotated by applying only the rotational force without urging the cylinder, and the cutting end surface of the cylinder is used as a reference surface to perform lead processing on the outer peripheral surface of the cylinder to improve the processing accuracy and achieve high precision. Cutting apparatus and cutting method can be performed in the lead processing is to provide.

[0009]

In order to achieve the above object, the present invention is configured as follows. That is,
The present invention relates to a main shaft for imparting rotational movement to the cylinder part of an assembly part comprising a shaft part rotatably attached to a headstock and a cylinder part fixed thereto, and a setting attachment part rotatably attached to the shaft part; Attached to and engaging with an engaging hole formed in the cylinder portion of the assembly part,
A jig base having a reference block that comes into contact with a longitudinal reference surface formed on the setting attachment portion of the assembly part, and a chuck that clamps and fixes the outer peripheral surface of the setting attachment portion; A tool post table attached to a base arranged between the main shaft, a first tool post having a first tool for machining a reference surface on a radial surface of the cylinder portion fixed to the tool post table, and the cylinder The present invention relates to a cutting device having a reciprocating second tool post having a second tool for lead processing attached to the outer peripheral surface of the portion.

Further, in this cutting apparatus, the jig base has a tail stock provided with a through hole fixed on a base, a sleeve capable of sliding through the through hole of the tail stock, and holding the chuck, An operating cylinder attached to the tailstock, a rod attached to the end of the sleeve and provided with a piston that reciprocates in the operating cylinder, and axial movement of the rod can be stopped midway and the stop position can be changed. It has a stopper means.

Alternatively, according to the present invention, the setting attachment portion of an assembly component including a shaft portion to which a relatively rotatable cylinder portion is fixed and a setting attachment portion is held by a jig base having a chuck,
The cylinder part is rotated by applying only a rotational force to the cylinder part of the assembly component without applying an axial thrust to the cylinder part by means of a spindle arranged to face the jig base in the axial direction,
The first end in which the end surface of the cylinder part is installed on the tool post table.
A cutting method, characterized in that cutting is performed as a reference surface by a tool, and reed processing is performed on the outer peripheral surface of the cylinder portion by reciprocally moving a second tool installed on the tool rest table according to the reference surface. Regarding

Further, in this cutting method, the chuck of the jig base supporting the assembly parts is temporarily stopped before the spindle, and a kele pin provided on the spindle is formed on the cylinder portion of the assembly part. Then, the chuck of the jig base is moved to the main shaft side to engage the kele pin with the engagement hole.

[0013]

Since the cutting apparatus and the cutting method according to the present invention are configured as described above, they operate as follows. That is, according to the present invention, a jig base supporting an assembly component composed of a relatively rotatable shaft part and a setting mounting part is arranged on an NC table, and the shaft part mounted on a chuck of the jig base is used as a main shaft. Install a first cutter that stops the movement in the near direction and adjusts the position, applies only rotational motion to the cylinder section without applying axial thrust to the cylinder section, and cuts the end surface of the cylinder section as a reference plane. Since the first tool post and the reciprocating slide having the second tool for reciprocating the outer peripheral surface of the cylinder portion for cutting the lead are attached, the end surface machining and the lead machining as the reference surface of the product are performed. Can be processed on the same NC table machine,
The positional relationship between both processing surfaces is always the same without adjustment, and high processing accuracy can be secured.

Further, the jig base in this cutting apparatus is a tail stock having a through hole fixed on a base, a sleeve which is slidable in the through hole of the tail stock and holds the chuck, A rod having a piston attached to the end of the sleeve and attached to the tailstock and capable of reciprocating in a cylinder; and an intermediate stopper capable of stopping the axial movement of the rod and changing the stop position. Therefore, when holding the shaft portion, the thrust in the axial direction is not urged to the shaft portion, and the alignment of the engagement hole formed in the cylinder portion of the shaft portion with the kele pin of the main shaft is brought close to each other. The position can be adjusted, and the position can be adjusted easily and surely.

In addition, the rotation of the shaft portion is performed because the kele pin which is rotatably provided on the headstock and which is rotated by the main shaft engages with the engagement hole of the cylinder portion to rotate the shaft portion. Thrust does not act on the part, only rotational force is applied, and does not affect the machining accuracy in the axial direction. A thrust force in the axial direction is not applied to the shaft portion, and only the pressing force in the vertical direction acts to hold the shaft portion.
A thrust force does not act on the shaft portion, and only a rotational force is applied, which does not affect the machining accuracy of the shaft portion in the axial direction with respect to the cylinder portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting apparatus and a cutting method according to the present invention will be described below with reference to the drawings. Figure 1
1 is a front view showing an embodiment of a cutting device according to the present invention, FIG. 2 is a plan view of the cutting device of FIG. 1, FIG. 3 is a side view of the cutting device of FIG. 1, and FIG. 4 is a cutting process of FIG. 7 is a front view of the main part of the machine, FIG. 5 is a sectional view of the main part of the cutting machine of FIG. 1, FIG. 6 is a side view of the main machine side of the cutting machine of FIG. 1, and FIG.
Is a sectional view of the jig table of the cutting apparatus of FIG. 1, FIG. 8 is a plan view of the jig table of FIG. 7, and FIG. 9 is a side view of the jig table of FIG.

As shown in FIG. 5, the cutting apparatus and the cutting method include a shaft portion 5 to which a cylinder portion 6 is fixed, and a setting attachment portion 7 attached to the shaft portion 5 via a bearing 22 so as to be relatively rotatable. The assembly part 1 consisting of is cut. Regarding the cutting apparatus and the cutting method, specifically, the cylinder portion 6 of the assembly part 1 has an 8 mm VTR.
Which is a cylinder part of the cylinder part 6, and the end face 23 of the cylinder part 6 is subjected to radial cutting on a surface serving as a reference surface of the product, and
The outer peripheral surface 24 of the cylinder portion 6 is cut with a lead which serves as a guide for tape travel. Further, this cutting device is provided with an automatic opening / closing door, a coolant device, and an NC device, but the description thereof will be omitted here.

In this cutting apparatus, the bed 10 is fixed to the machine base 11, the headstock 4 is mounted on the bed 10, and the jig base 2 is mounted on the bed 10 so as to face the headstock 4. Bed 1 between the headstock 4 and the jig base 2
A table base 13 is attached on the 0. The spindle 3 is attached to the spindle stock 4 so as to be driven by a spindle motor 21 to rotate. On the bed 10, the table base 13 is moved in the axial direction, that is, the Z-axis direction.
A shaft motor 19 is attached. Therefore, the table base 13 is moved to the bed 1 by the operation of the Z-axis motor 19.
Sliding motion is applied from the end of zero. A sleeve 12 that serves as a shaft is reciprocally attached to a tailstock 17 that constitutes the jig base 2, and a taper portion 33 of the chuck 20 is inserted and attached into an attachment hole 34 of the sleeve 12 (see FIG. 7). A technique for aligning the rotation center of the spindle 3 attached to the headstock 4 and the rotation center of the cylinder portion 6 of the assembly part 1 attached to the jig base 2 is disclosed in, for example, Japanese Patent Application No.
It is possible to apply the technique of the tailstock device disclosed in Japanese Patent No. 632111. In this case, the lathe spindle of the tailstock device corresponds to the spindle 3 of the present invention, and the tailstock of the tailstock device is Corresponds to the jig base 2 of the present invention. Therefore, a detailed description thereof will be omitted here.

Further, on the tool rest table 14 on the table base 13 arranged between the jig base 2 and the spindle 3, a tool for cutting the end face 23 which is the radial surface of the assembly component 1, that is, the reference surface. A turret 8 to which 16 is attached is attached. Turret table 14 on table base 13
And an X-axis motor 18 that moves in the direction orthogonal to the axial direction, that is, the X-axis direction. Therefore, the tool rest table 14 can slide on the table base 13 by the operation of the X-axis motor 18. Furthermore, the turret table 1
On the outer peripheral surface 24 of the cylinder portion 6, a tool rest 9 equipped with a reciprocating slide having a tool 15 for lead processing attached thereto and a servo motor 19 for reciprocating the tool rest 9 are attached. The tool post 9 equipped with a reciprocating slide is, for example, a tool post device for lead processing disclosed in Japanese Patent Application Laid-Open No. 2-180503 and an NC lead processing device using the tool post device, or Japanese Patent Application No. 3-3200. -159
The precision slide mechanism disclosed in Japanese Patent No. 841 can be applied, and a detailed description thereof will be omitted here.

In this cutting apparatus, the main shaft 3 imparts a rotational movement to the cylinder portion 6 of the assembly part 1, and the main face 3 is provided with a broken face plate 26. The shank face plate 26 is located at a position eccentric from the rotation center of the spindle 3.
One or more kele pins 25 are detachably fixed. The kele pin 25 is inserted into an engagement hole 30 which is a drive hole formed in the cylinder portion 6 of the assembly component 1 with a gap and engages in a disengageable manner. The rotation of the main shaft 3 is transmitted to the vibrating face plate 26, and the vibrating face plate 26 is rotated in a predetermined circular motion by decentering the kele pin 25 from the rotation center. Therefore, since the kerep pin 25 is engaged with the engagement hole 30 of the cylinder portion 6 of the assembly component 1, when the setting attachment portion 7 is fixed to the chuck 20, the kerep pin 25 pushes the cylinder portion 6 in the axial direction. Without this, that is, the thrust force is not applied to the cylinder portion 6, and only the rotational force acts and the cylinder portion 6 rotates with respect to the setting attachment portion 7.

In this cutting apparatus, the chuck 20 attached to the jig base 2 is attached to the setting attachment portion 7 of the assembly component 1.
It has a reference block 27 that abuts on the longitudinal reference surface 28 formed in the above, and a chuck claw 32 that clamps and fixes the outer peripheral surface 31 of the setting attachment portion 7. Outer peripheral surface 3 of setting attachment part 7
Reference numeral 1 is a reference surface which is a processing reference in the radial direction. Jig stand 2
Has a tail stock 17 having a through hole 29 fixed on a table base 13, and a sleeve 12 holding a chuck 20 at one end is slidably attached to the through hole 29 of the tail stock 17. ing. The sleeve 12 is configured to be slidable in two steps from the tailstock 17 toward the main shaft 3 side in the axial direction so as to extend. That is, the shaft of the sleeve 12 is configured to stand by in the middle in the axial movement, and at that position, as will be described later, the kele pin 25 attached to the main shaft 3 and the cylinder portion of the assembly part 1 attached to the jig base 2 are described. 6, the position of the engaging hole 30 is aligned with that of the engaging hole 30, and then the shaft or sleeve 12 is further extended to engage the engaging hole 30 with the kele pin 25.

A cylinder cover 50 is attached to the jig base 2, and the sleeve 1 is provided in the cylinder cover 50.
An operating cylinder 35 for reciprocating the 2 and an operating cylinder 40 for operating the lever 39 are arranged. The working cylinder 35 is attached to a cylinder support 54 fixed to the tail stock 17, and the working cylinder 40 is pivotally attached to a bracket 51 fixed to the tail stock 17 by a pivot pin 52. A rod 36 having a piston 37 attached thereto is fixed to the other end of the sleeve 12. Working cylinder 35 fixed to the tailstock 17
Is divided into two hydraulic chambers 43 and 44 by a piston 37 that reciprocates in the working cylinder 35. The rod 36 penetrates the working cylinder 35, and the lever 3
The stopper stop hole 48 of FIG. Hydraulic chamber 43,
The hydraulic pressure supply passages 45 and 46 for supplying hydraulic pressure through the switching valves 41 and 42 are connected to the hydraulic pressure control valve 44. Piston 3
In order to reciprocate 7 in the working cylinder 35, the switching valves 41, 42 are switched to change the hydraulic chambers 43, 44.
By supplying hydraulic pressure to the hydraulic pressure supply passages 45 and 46, the hydraulic pressure in the hydraulic pressure chambers 43 and 44 acts on the piston 37 to reciprocate the rod 36.

On this jig base 2, a stopper 3 is attached to the rod 36 to stop the axial movement of the rod 36 on the way.
8 is attached. One end of a lever 39 is pivotally attached to the working cylinder 35 by a pivot pin 47. A stopper stop hole 48 is formed in the lever 39. The rod 36 passes through the stopper stop hole 48 of the lever 39. The stopper 38 fixed to the rod 36 has a stopper 55 around the stopper stop hole 48 formed in the lever 39.
The rod 36 is configured to stop when it abuts against. The other end of the lever 39 is pivotally attached by a pivot pin 53 to a rod 49 fixed to a piston that reciprocates in the working cylinder 40. Therefore, when the operating cylinder 40 is operated and the rod 49 is extended, the lever 39 is inclined and the stopper stop hole 48 of the lever 39 is provided.
At the abutting position of the stopper portion 38 and the stopper 38 on the periphery of the sleeve 12, the chuck 20 of the sleeve 12 is separated from the main spindle 3 by a predetermined distance, and the engagement between the kele pin 25 attached to the main spindle 3 and the cylinder portion 6 of the assembly component 1. This is a position adjustment position for aligning the dowel hole 30.

In this cutting apparatus, in order to engage the assembly part 1 on the chuck 20 and the kele pin 25 mounted on the main shaft 3 and the engagement hole 30 of the cylinder part 6 of the assembly part 1, the following operation is performed. The cylinder 35 and the operating cylinder 40 may be operated. First, the operating cylinder 35 is operated to bring the rod 36 into the most extended state from the tailstock 17 to the right side in FIG.
0 is operated to extend the rod 49, and the lever 39 is inclined to the stopper 38 side. Therefore, the chuck claws 32 of the chuck 20 are loosened to remove the cut assembly parts, and the unprocessed assembly parts 1 are attached to the chuck 20. That is, the reference block 27 provided on the chuck 20 is brought into contact with or pressed against the longitudinal reference surface 28 of the setting attachment portion 7 of the assembly part 1, and the chuck claw 32 of the chuck 20 is operated in the corresponding contact state to set the attachment portion. The outer peripheral surface 31 of 7 is clamped, and the assembly component 1 is attached to the chuck 20.

Next, the actuating cylinder 35 is actuated to perform rapid feed to an intermediate position where the stopper 38 fixed to the rod 36 abuts the stop portion 55 around the stopper stop hole 48 formed in the lever 39. When the stopper 38 contacts the stop portion 55, the axial movement of the rod 36 and the sleeve 12 is temporarily stopped. Therefore, the stopper hole 38 is fixed to the engagement hole 30 formed in the cylinder portion 6 of the assembly component 1 and the spindle 3. The cylinder portion 6 of the assembly part 1 is rotated with respect to the setting attachment portion 7 via the bearing 22 so that the engagement pin 25 attached to the tip surface plate 26 is in the engagement position, and the cylinder portion 6 is engaged with the engagement hole 30 of the cylinder portion 6. The position with the kele pin 25 is aligned.

When the engaging hole 30 and the kele pin 25 are aligned and brought into a position where they can be engaged, the operating cylinder 40 is operated to raise the lever 39 and the stopper 38 is regulated by the adjusting lever 39. The state is released, the actuation cylinder 35 is actuated to move the sleeve 12 to the main shaft 3 side, and the engagement hole 30 of the cylinder portion 6 is engaged with the kele pin 25.
The operation of the operating cylinder 40 is stopped in a state where the engaging hole 30 is simply engaged with the kele pin 25 and is not pressed, and
The operation of the operating cylinder 35 is stopped, and the assembly part 1 attached to the sleeve 12 and the chuck 20 is stopped in the axial direction. When the engagement hole 30 of the cylinder portion 6 is engaged with the kele pin 25, the stopper 38 contacts the stop portion 55 of the adjusting lever 39, and the sleeve 12 cannot move further toward the main shaft 3 side. Therefore, the engaging hole 30 and the kele pin 25 are engaged with each other in the cylinder portion 6 of the assembly component 1 in the state where no thrust is applied in the axial direction.
When the main shaft 3 is rotated in this state, only the rotational force is applied to the cylinder portion 6. Therefore, the thrust acting on the sleeve 12 of the jig base 2 does not act on the assembly part 1 at all in the engaged state of the engagement hole 30 and the kele pin 25, which adversely affects the cutting work in the axial direction of the assembly part 1. Never give.

When the start switch (not shown) is turned on with the kele pin 25 attached to the spindle 3 engaged with the engagement hole 30 of the cylinder portion 6, the automatic opening / closing door is closed and the spindle 3 is operated. The motor is activated to rotate the main shaft 3, and the coolant device is activated to discharge the coolant liquid to the machining area. Therefore, the cylinder portion 6 of the assembly component 1
The end surface 23 of the tool is finished by the tool 16 attached to the tool rest 8 to process the reference surface, and after the end surface is machined on the cylinder portion 6, the tool rest 8 is retracted. Then
The outer peripheral surface 24 of the cylinder portion 6 corresponding to the reference surface is lead-processed by the tool 15 attached to the tool rest 9. At this time, the rotation speed of the spindle 3 is converted so that the rotation speed of the cylinder portion 6 becomes the optimum rotation speed for lead processing.
Leading is performed on the outer peripheral surface 24 of the cylinder portion 6 while reciprocating the tool rest 9. After the lead processing on the outer peripheral surface 24 is completed, the tool rest 9 is retracted. Therefore, the rotation of the main shaft 3 is stopped and the operation of the coolant device is stopped. The automatic door opens and the sleeve 12
Is retracted, the chuck 20 is operated to release the chuck claw 32, the cut assembly 1 is taken out from the chuck 20, and the cutting is completed.

[0028]

Since the cutting apparatus and the cutting method according to the present invention are configured as described above, they have the following effects. That is, the present invention relates to the cylinder part of an assembly part including a shaft part to which a cylinder part is fixed by a kele pin mounted to a spindle rotatably mounted to a headstock and a setting mount part mounted to the shaft part so as to be relatively rotatable. A rotating motion is applied to the jig base to bring it into contact with the reference block provided on the jig base against the longitudinal reference plane formed on the setting mount, and the chuck provided on the jig base clamps the outer peripheral surface of the setting mount. Since it is fixed by the above-mentioned method, only the rotational movement is given to the cylinder portion without the thrust in the axial direction acting thereon. Therefore,
The end surface of the cylinder portion is cut by a first tool provided on a first tool rest fixed to a tool rest table attached to a base on the bed arranged between the jig stand and the main spindle, When the lead is cut on the outer peripheral surface of the cylinder portion with the second tool provided on the second tool rest attached to the tool rest table, the machining accuracy in the axial direction of the cylinder portion is not affected, The cylinder portion can be subjected to highly accurate end surface processing, that is, reference surface processing and highly accurate lead processing of the outer peripheral surface. Moreover, the machining of the end surface of the cylinder portion becomes the reference surface of the product, the lead processing can be performed with reference to the end surface machining of the reference surface, and both can be processed on the same tool post table. The positional relationship between the end surface processing and the lead processing matches perfectly without adjustment.

In addition, since this cutting device performs cutting as an assembled part in which the shaft part to which the cylinder part is fixed and the setting attachment part rotatably attached to the shaft part are assembled, it is assembled into the assembly part. At this time, the processing error of each part does not become a cumulative error, and the processing accuracy is improved. Therefore, if the assembly part is, for example, a cylinder of 8 mm VTR, the final finishing process is performed as a cylinder in use, no cumulative error appears in the product, and the rotary head assembled to the standard of the product. And the positional relationship between the lead processed cylinder part and the
High precision products can be obtained.

Further, the jig base has a tail stock having a through hole fixed on a base, a sleeve capable of sliding through the through hole of the tail stock, and holding the chuck, and an end portion of the sleeve. And a rod equipped with a piston that can reciprocate in the cylinder attached to the tailstock, and a stopper that can stop the axial movement of the rod and change the stop position. The positioning of the engaging hole formed in the portion and the kele pin attached to the main shaft can be achieved extremely easily and reliably.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cutting apparatus according to the present invention.

FIG. 2 is a plan view of the cutting apparatus of FIG.

3 is a side view of the cutting apparatus of FIG. 1. FIG.

FIG. 4 is a front view of a main part of the cutting apparatus of FIG.

5 is a cross-sectional view of a main part of the cutting apparatus of FIG.

FIG. 6 is a side view of the cutting apparatus of FIG. 1 on a spindle side.

7 is a cross-sectional view of a jig base of the cutting apparatus of FIG.

8 is a plan view of the jig base of FIG. 7. FIG.

9 is a side view of the jig base of FIG. 7. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Assembly parts 2 Jig stand 3 Spindle 4 Spindle stock 5 Shaft part 6 Cylinder part 7 Setting attachment part 8 Turret (1st turret) 9 Turret (2nd turret) 10 Bed 11 Base 12 Sleeve 14 Turret table 15 Cutlery (2nd cutlery) 16 Cutlery (1st cutlery) 17 Tailstock 20 Chuck 23 End surface (reference surface of cylinder part) 24 Outer peripheral surface (outer peripheral surface of cylinder part) 25 Kelepin 27 Reference block 28 Longitudinal reference surface 29 Penetration Hole 30 Engagement hole 31 Outer peripheral surface (outer peripheral surface of setting attachment portion) 35 Working cylinder 36 Rod 37 Piston 38 Stopper (stopper means) 39 Adjustment lever (stopper means) 48 Stopper stop hole (stopper means) 55 Stopping portion (stopper means) )

Claims (4)

[Claims] 1. A main shaft for imparting rotational movement to the cylinder part of an assembly part comprising a shaft part rotatably mounted on a headstock and a cylinder part fixed thereto, and a setting mount part rotatably mounted on the shaft part, The setting attachment having a kele pin attached to the main shaft and engaging with an engagement hole formed in the cylinder portion of the assembly component, and a reference block abutting against a longitudinal reference surface formed on the setting attachment portion of the assembly component. Of a jig table having a chuck for clamping and fixing the outer peripheral surface of the tool part, a tool rest table attached to a base arranged between the jig stand and the spindle, and a cylinder part fixed to the tool rest table. A cutting tool having a first tool post with a first tool for machining a reference surface on the radial surface and a reciprocating second tool post with a second tool for lead machining on the outer peripheral surface of the cylinder part. Engineering equipment. 2. The jig base is attached to the tail stock, which has a through hole fixed on a base, a sleeve which can slide through the through hole of the tail stock, and which holds the chuck, and the tail stock. An operating cylinder, a rod provided with a piston attached to an end portion of the sleeve and reciprocating in the operating cylinder, and stopper means capable of stopping the axial movement of the rod halfway and changing the stop position. The cutting device according to 1. 3. A jig base provided with a chuck holds the setting attachment part of an assembly consisting of a shaft part to which a relatively rotatable cylinder part is fixed and a setting attachment part, and the jig base is axially mounted on the jig base. A first spindle in which an end face of the cylinder portion is installed on a tool rest table by applying only a rotational force to the cylinder portion of the assembly component by a rotational force without imparting an axial thrust to the cylinder portion by the spindles opposed to each other. A cutting method, characterized in that cutting is performed as a reference surface by a tool, and reed processing is performed on the outer peripheral surface of the cylinder portion by reciprocally moving a second tool installed on the tool rest table according to the reference surface. .. 4. The chuck of the jig base supporting the assembly is temporarily stopped before the main shaft, and a kele pin provided on the main shaft is positioned at an engagement hole formed in the cylinder portion of the assembly. The cutting method according to claim 3, wherein the chucks of the jig base are aligned, and then the chuck of the jig base is moved toward the spindle to engage the kele pins in the engagement holes.