JP3006154U - Power transmission device for forming tools - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a power transmission device for a press molding machine that enables bending forming work outside the work area without causing excessive bending stress in the forming tool. The forming tool assembly 100 includes first and second reciprocating members 113 and 123. The first reciprocating member has an input portion that can come into contact with the driving member of the press molding machine 1, receives the molding power of the press molding machine transmitted vertically, and reciprocates vertically to form a second reciprocating member. Is connected to the movable forming tool 140 via a piston rod and reciprocates in the horizontal direction. A hydraulic actuating mechanism is interposed between the first and second reciprocating members, and the vertical movement of the first reciprocating member is converted into the horizontal movement of the second reciprocating member via hydraulic pressure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power transmission device for a forming tool, and more particularly, to a power transmission device for a forming tool used in a high-pressure press molding machine that shear-deforms a work.

[0002]

[Prior art]

 In a method of forming a work using a high-pressure forming machine such as a high-pressure press machine, a certain type of forming operation includes different multi-stage forming steps. For example, as shown in FIGS. 7A and 7B, when bending an L-shaped steel material (angle-shaped steel material) W, a V-shaped notch (cutout) K is punched in the flange portion of the shaped steel material in the first step. (See FIG. 7A), and the shaped steel material W is bent around the axis Z-Z in the second step (see FIG. 7B). At least two press molding machines are generally required to perform such processing. Here, there is known a press-molding machine having a region for performing the first and second steps, respectively. However, since this type of press-forming machine permanently has work areas for executing the first step and the second step, respectively, the entire machine has become larger. On the other hand, there is known a press-forming machine having a single work area, in which various kinds of forming tools can be attached or installed. This type of press-molding machine is provided with a support base or working table T and an upper drive device D above the support base T, as schematically shown in FIG. A fixed tool S2, for example various forming dies, is removably fixed on the support T, and a movable forming tool S1, for example a punching tool or a bending tool, is removably attached to the lower end of the lifting rod R. In this type of press forming machine P, for example, in a first step of punching a V-shaped notch on a flange portion of an L-shaped steel material W, a punching die and a punching tool (not shown) are mounted on a support base T. The press-forming machine P punches a V-shaped notch K as shown in FIG. 7A. On the other hand, in the first step of bending the L-shaped steel material W, the bending forming die S1 and the bending tool S2 shown in FIG. 8A are attached to the support base T and the elevating rod R, respectively, and the press forming machine P is The L-shaped steel material W is bent as shown in FIG. However, since the L-shaped steel material W bends upward during bending and collides with the side surface of the upper drive device D, the height dimension H of the work area A must be set large. However, an increase in the height H of the work area A does not only lead to an increase in the size of the press molding machine P, but also a shape member having a plurality of bent portions, for example, a rectangular frame member shown in FIG. 7 (C). In the case of bending etc., there arises a problem that the upper drive device D hinders the positioning work of the profile and limits the material shape which can be bent and deformed.

[0003]

[Issues to be solved by the device]

 In order to solve such a problem, as shown in FIG. 8 (B), the bending forming die S2 'and the bending tool S1' are projected forward from the support base T and the lifting rod R to perform the bending work. A method of executing in front of the area A has been proposed. However, in this method of bending, the lifting axis XX of the lifting rod R and the bending deformation plane are separated from each other, and the power or load F acting along the lifting axis XX and the axis line. The supporting force or reaction force F'on X'-X 'acts on the bending tool S1' and the elevating rod R as a bending moment M by a couple force spaced by a distance e, and also acts on the forming die S2 '. The applied load causes bending stress in the forming die S2 '. Therefore, the bending die S2 'and the bending tool S1' must be designed to have high strength and high rigidity so as to withstand excessive bending stress, and as a result, the forming tool has a high weight. And it becomes expensive. The present invention has been made in view of the above points, and an object of the present invention is to provide a press forming machine capable of performing bending forming work outside the work area without causing excessive bending stress in the forming tool. It is to provide a power transmission device.

A second object of the present invention is to provide a power transmission device for a press molding machine capable of minimizing power loss in the power transmission path. A third object of the present invention is to provide a forming tool equipped with such a power transmission device. The present invention also provides a forming power transmission device capable of diverting a forming power to a desired direction and transmitting the forming power to a desired work area located outside a preset work area. This is the fourth purpose.

[0005]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, a power transmission device for a press molding machine according to the present invention includes a first reciprocating member which receives a molding power or a molding load transmitted in a first direction and reciprocates in the first direction. And a second reciprocating member that is connected to the movable forming tool and reciprocates in a second direction that forms a predetermined angle with respect to the first direction, and is interposed between the first and second reciprocating members. And power diverting means. The first reciprocating member has an input portion capable of inputting a driving force of the press molding machine, for example, an input portion that abuts a piston rod of the press molding machine, and the second reciprocating member drives the movable molding tool. It comprises a drive member, for example a piston rod. A guide device for guiding the second reciprocating member in the second direction, for example, a cylinder case is provided, and the guide device supports a fixed tool, for example, a molding die, which cooperates with the movable forming tool, at a predetermined position. . The first reciprocating member is moved forward in the first direction by the molding power inputted through the input unit, and the second reciprocating member is moved forward in the second direction through the power turning means. The second forward / backward moving member moves the movable forming tool forward through the drive member, and the movable forming tool cooperates with the fixed tool to form a work such as an L-shaped steel material.

[0006] Preferably, the first reciprocating member is supported by a hollow member having a guide surface for guiding the first reciprocating member to reciprocate in the first direction, and the second reciprocating member is It is supported by a hollow member having a guide surface for guiding the second reciprocating member so as to reciprocate in the second direction. More preferably, the first direction and the second direction are orthogonal to each other. In a preferred embodiment of the present invention, the first and second reciprocating members are reciprocating pistons, and the hollow member is a cylinder case having a piston sliding surface or a cylinder bore. In a further preferred embodiment of the present invention, the first reciprocating member is aligned with the axis of the upper driving device of the press molding machine, and the input part is capable of transmitting the power or load of the lifting driving member of the upper driving device. The upper end surface of the first reciprocating member. According to a preferred embodiment of the present invention, the power diverting means is (fluid pressure, eg hydraulic pressure) and the first and second reciprocating members are a pair of first and second fluid actuated members. It is the 1st and 2nd piston of a type cylinder device. The first cylinder device is vertically oriented, the upper end of the first piston constitutes an input part, and the lower end of the first piston defines a first fluid pressure chamber (for example, a first hydraulic chamber). To do. The first fluid pressure chamber communicates with a second fluid pressure chamber (for example, a second hydraulic pressure chamber) formed in the second cylinder device, and the first end surface of the second piston faces the second fluid pressure chamber. The piston rod extends in the second direction from the second end surface of the second piston, and the movable forming tool is attached to the tip of the piston rod. For urging the first piston to the raised position and the second piston to the retracted position, urging means, for example, a compression spring, is provided in one or both of the first pressure chamber and the second pressure chamber. To be done.

The first cylinder device is aligned with the lifting drive member of the press molding machine, and the lower end of the lifting drive member presses the upper end of the first piston in the first direction (downward) to move the first pressure chamber. Increase the pressure. The fluid in the first pressure chamber flows into the second pressure chamber and pressurizes the second pressure chamber. As a result, the second piston advances, the piston rod extends, and the movable forming tool is operated (advanced). According to another preferred embodiment of the present invention, the power diverting means is an inclined lower end surface of the first reciprocating member and an inclined rear end surface of the second reciprocating member. The inclined lower end surface is inclined at a predetermined angle with respect to the first direction, for example, 45 °, and the inclined rear end surface is inclined with respect to the second direction at a predetermined angle, for example, 45 °. Incline. The first and second reciprocating members are arranged in the pair of first and second cylinder cases. The first cylinder case is vertically oriented, and the upper end surface of the first reciprocating member constitutes an input surface. The piston rod extends in the second direction from the front end surface of the second reciprocating member, and the movable forming tool is attached to the tip end portion of the piston rod. An urging means for urging the second reciprocating member rearward is arranged in the second cylinder case, and a rear end inclined surface of the second reciprocating member is in sliding contact with a lower end inclined surface of the first reciprocating member.

The first reciprocating member is aligned with the lifting drive member of the press molding machine, and the lower end of the lifting drive member presses the upper end of the first reciprocating member in the first direction (downward). The lower end sloping surface of the first reciprocating member presses the rear end sloping surface of the second reciprocating member in the second direction, and as a result, the second reciprocating member advances, the piston rod extends, and the forming tool To operate.

[0009]

【Example】

 Hereinafter, preferred embodiments of a power transmission device for a forming tool according to the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are a perspective view and a side view of a press molding machine according to an embodiment of the present invention. The portable press molding machine 1 includes a frame body or a machine frame 2, and the machine frame 2 is a base that is supported by a carrying handle 21 that a user holds with his / her fingers and a supporting surface such as a tabletop or a floor. The base 22 and the intermediate stage 23 arranged above the base 22 are provided. The intermediate stage 23 is supported by the wall 24. The base 22 is provided with a plurality of brackets or legs 26 that can be fixed on the support surface with a fastener such as bolts or a fastener. The legs 26 are arranged at the corners of the base 22, respectively, and the lower surfaces of the legs 26 are located on the same horizontal plane, and the first abutting plane of the machine frame 2 that contacts the supporting surface. To form. A plurality of second leg portions 27 are arranged on the rear surface or the rear surface of the machine casing 2. The pair of second legs 27 are arranged symmetrically on the rear surface of the lower end portion of the base 22, and the pair of second legs 27 project rearward from the rear surface of the intermediate stage 23. The front end surface of the second leg portion 27 is located on the same vertical plane and forms a second contact plane of the machine casing 2. The tip surfaces of the legs 27 come into contact with the support surfaces when the press molding machine 1 is tilted backward by an angle of 90 degrees.

Between the base 22 and the intermediate stage 23, a work area A 1 which is opened to the side and the front is formed, and the work area A is an intermediate area between the tool support table 25 on the base 22 and the machine frame 2. It is defined by the stage 23 and the wall 24. In each drawing, the press molding machine 1 is arranged in a general vertical use position, and the work area A is open to the front. The press molding machine 1 is normally used in this vertical position. However, in some applications or conditions, the press machine 1 is used in a horizontal use position tilted backwards by an angle of 90 °, in which the working area A is upwards. Open. The press forming machine 1 shown in FIGS. 1 and 2 is mainly used as a cutter or a shearing machine for cutting steel material, and the work area A has a movable blade assembly 10 and a fixed blade assembly. 11 are arranged. The movable blade assembly 10 is moved up and down in the work area A, and the fixed blade assembly 11 is fixed to the horizontal upper surface of the tool support table 25. The press molding machine 1 of this example is set to have a depth of about 40 to 45 cm and an overall height of about 65 to 70 cm, and the weight of the press molding machine 1 is, for example, about 100 to 110 kg (the movable blade assembly 10 and The body weight excluding the fixed blade assembly 11 is set to about 90 kg).

The press molding machine 1 has a pair of vertical axes X-X and Y-Y (FIG. 2) that are separated from each other in the horizontal direction. An electric motor 3 forming a drive source and a pump unit 4 connected to the output shaft of the electric motor 3 are arranged on the vertical axis YY, and a hydraulic cylinder device is arranged on the vertical axis XX. 5 are arranged. The hydraulic cylinder device 5 cooperates with the pump portion 4 to form a hydraulic operating mechanism of the press molding machine 1. The hydraulic release device 6 including the electromagnetic solenoid 60 is arranged in the upper region of the intermediate stage 23 between the vertical axes XX and YY. An oil storage device 7 having a so-called airbag is arranged above the pump unit 4. Further, the locking device 8 is arranged in the work area A. The locking device 8 is for removably locking or fixing the movable blade assembly 10 to the enlarged lower end portion 51 of the reciprocating member (piston rod) 50 of the hydraulic cylinder device 5. Further, an elevating control device 9 for restricting the elevating stroke of the movable blade assembly 10 is arranged at the front edge of the intermediate stage 23. Between the hydraulic release device 6 and the oil storage device 7, a flexible pipe material, for example, a rubber pipe 41 is inserted. The flexible tube 41 allows relative displacement between a member or part on the vertical axis X-X and a member or part on the vertical axis Y-Y, or compensates for a mounting error of these members or parts.

The piston rod 50 of the hydraulic cylinder device 5 is arranged concentrically with the vertical axis Y-Y and extends downward through the intermediate stage 23. The lower end surface of the enlarged head portion 51 has a lower surface opening or a tool holding hole (not shown) capable of receiving a small-diameter base portion (not shown) of the movable blade assembly 10, and the small-diameter base portion of the movable blade assembly 10 is , Is inserted into the lower opening of the enlarged head portion 51. The locking device 8 including a clutch pin is provided on the enlarged head portion 51. When the clutch pin 8 is pulled outward with fingers, the tip of the clutch pin 80 is separated from the base of the movable blade assembly, and the movable blade assembly 10 is released. On the other hand, when the clutch pin 8 is released, the clutch pin 8 is displaced inward by the built-in spring, the tip of the clutch pin 8 engages with the base of the movable blade assembly 10, and the movable blade assembly 10 is released. It is locked to the enlarged head part 51. With such a structure, the movable blade assembly 10 can be replaced with a movable tool of another structure or type in a one-touch manner. As shown in FIG. 2, the movable blade assembly 10 includes a tool holder 15 having a base portion, and a movable blade 10 a connected to the tool holder 15 via a support shaft 16. The movable blade 10 a has a cutting blade that extends symmetrically obliquely upward from the tip on the vertical axis XX, and faces the fixed blade assembly 11. The fixed blade assembly 11 includes a pair of parallel fixed blades 12, and a slit 13 that can accommodate the movable blade 10a is formed between the fixed blades 12. The slit 13 has substantially the same width as the movable blade 10a. Each fixed blade 12 is vertically fixed to the substrate 14, and the substrate 12 is detachably fixed to the horizontal upper surface of the tool support 25. Each of the fixed blades 12 has a cutting blade that extends obliquely upward and symmetrically from the bottom end on the vertical axis XX, and the left and right cutting blades are spaced apart from each other by an angle of 90 degrees centering on the bottom end, for example. ing. In FIG. 2, an L-75 × 75 × 6 (mm) angle-shaped steel material is illustrated as the work W placed on the fixed blade 12. When the movable blade assembly 10 descends due to the extension of the piston rod 50, the fixed blade 12 cooperates with the movable blade 10a to shear the work W inserted between the movable blade 10a and the fixed blade 12, Cut the work W vertically.

The expansion head 51 of the piston rod includes a horizontal connecting rod 59. The horizontal connecting rod 59 is operatively connected to an elevating / lowering restricting device 9 for restricting an elevating / lowering stroke of the piston rod 50. The lifting control device 9 includes a rotation shaft 91. An enlarged head 94 provided with a knurl is integrally attached to the lower end of the rotary shaft 91. The stoppers 95 are arranged above the enlarged head portion 94 with a predetermined space therebetween, and the horizontal connecting rod 59 is integrally connected between the enlarged head portion 94 and the stopper 95. The rotating shaft 91 penetrates the bearing hole of the intermediate stage 23 and extends vertically upward. A lead screw is formed on the rotating shaft 91. The elevating member 92 forming the LS dog is screwed into the lead screw, and the projection 93 protruding laterally is attached to the outer surface of the elevating member 92 by a screw or the like. The projection 93 penetrates the slot 97 of the scale plate 96, is guided in the vertical direction by the slot 97, and engages with the edge portion of the slot 97, so that the rotational movement around the rotary shaft 91 is prohibited. As shown in FIG. 1, a scale 99 is provided on the side surface of the scale plate 96, and an indicator needle 98 provided on the outer end of the projection 93 moves up and down along the scale 99 to indicate the height position of the elevating member 92. To do. As shown in FIG. 2, the lower limit setting limit switch LS is arranged below the elevating member 92, and the detector of the limit switch LS is positioned at a position where it can contact the lower inclined surface of the elevating member 92. The limit switch LS is attached to the intermediate stage 23 or the hydraulic cylinder device 5 so that the height can be adjusted, and is electrically connected to the electromagnetic solenoid 6 via a control device (not shown) of the press molding machine 1. When the LS dog 92 comes into contact with the detector of the limit switch LS (when the limit switch LS is turned ON), the electromagnetic solenoid 60 is demagnetized for a predetermined time to open the hydraulic pressure release valve of the hydraulic cylinder device 5.

3 and 4 are a longitudinal sectional view and a partial plan view showing a first embodiment of a forming tool assembly including a power transmission device of the present invention. As shown in FIG. 3, the forming tool assembly 100 includes a vertically oriented first cylinder device 110 and a horizontally oriented second cylinder device 120. The first cylinder device 110 includes a cylindrical cylinder case 111 having a cylinder bore, and the lower end surface of the cylinder case 111 has a horizontal table mounting surface 112. A vertical reciprocating piston 113 is arranged in the cylinder case 111, and the piston 113 slides vertically along the inner peripheral surface of the cylinder bore. The seal member 114 is fitted on the outer peripheral portion of the piston 113, and the hydraulic oil supply port including the plug 115 is arranged in the upward extension portion of the piston 113. An upper end portion of the piston 113 projects upward from the cylinder case 111, and a horizontal piston upper end surface 116 constitutes an input plane of molding power. A first hydraulic chamber 117 is defined below the piston 113, and a compression spring 118 is arranged in the first hydraulic chamber 117. The compression spring 118 is inserted between the lower surface of the piston 113 and the bottom wall of the first hydraulic chamber 117, and normally urges the piston 113 upward. The piston 113 is the inner periphery of the upper portion of the cylinder bore. It abuts on the lower end of the rising restriction ring 119 arranged on the surface.

The second cylinder device 120 includes a cylindrical cylinder case 121 having a cylinder bore. The rear end surface of the cylinder case 121 is formed integrally with the cylinder case 111, and the lower end surface of the cylinder case 121 is continuous with the horizontal table mounting surface 112. A horizontal reciprocating piston 123 is arranged in the cylinder case 121, and the piston 123 slides horizontally along the inner peripheral surface of the cylinder bore. The seal member 124 is fitted on the outer peripheral portion of the piston 123, and the hydraulic oil supply port provided with the plug 125 is arranged on the upper wall portion of the cylinder case 121. The second hydraulic chamber 127 is defined between the rear end face of the piston 123 and the rear end wall of the cylinder case 121, and the air chamber 129 released to the atmosphere is connected to the front end face of the piston 123 and the tool connecting portion 130. Formed in between. A compression spring 128 is arranged in the air chamber 129. The compression spring 128 is interposed between the front end surface of the piston 123 and the annular wall of the tool connecting portion 120, and always urges the piston 123 rearward. It is in contact with the rear wall. An annular portion 127a of the second hydraulic chamber 127 is always formed around the rear raised portion 123a, and the annular portion 127a is in constant communication with the first hydraulic chamber 117 of the first cylinder device 110 via the oil passage 122. ing.

A piston rod 126 extends concentrically and forward from the front end surface of the piston 123 and penetrates the tool connecting portion 130. The tool connecting portion 130 is integrally connected to the front end flange portion of the cylinder case 121 by a plurality of fixing bolts 135. A gap is formed between the outer peripheral surface of the piston rod 126 and the rod through hole 131 of the tool connecting portion 130 so that the outside region and the atmosphere chamber 129 can communicate with each other. The movable tool 140 engages with the small diameter protrusion 126a protruding from the front end surface of the piston rod 126, and is locked to the small diameter protrusion 126a by the locking pin 126b. As shown in FIG. 4, the movable tool 140 is a bending tool for bending the L-shaped steel material, and the movable tool 140 has a front end surface having a vertical groove 141 with a shape complementary to the outer shape of the bent portion. And the vertical groove 141 is defined by a pair of vertical surfaces 142 that intersect at right angles. A fixed tool 150 facing the movable tool 140 is removably fixed to the upper protruding portion 131 of the jaw portion 132. The upper protruding portion 131 is formed integrally with the jaw portion 132 or is formed separately from the jaw portion 132 and is fixed to the upper end surface of the jaw portion 132. The fixed tool 150 is a bending die for L-shaped steel material, and includes a tip portion 151 having a shape complementary to the internal shape of the bent portion of the L-shaped steel material W. The tip portion 151 is defined by a pair of vertical surfaces 152 that directly intersect each other.

As shown in FIG. 3, the base end portion of the jaw portion 132 is integrally connected to the lower end portion of the tool connecting portion 130 and extends forward from the tool connecting portion 130. The upper end surface of the jaw portion 132 forms a horizontal movable tool sliding plane 133, and the sliding plane 133 extends horizontally parallel to the lower end surface of the movable tool 140, so that the movable tool 140 extends and contracts with the piston rod 126. I will guide you in the direction. Next, the operation of the press molding machine 1 will be described. The press molding machine 1 is started by turning on the operation switch or the remote control switch of the control device attached to the machine frame 2. The electric motor 3 is operated and the electromagnetic solenoid 60 is excited (energized) to close the hydraulic pressure release valve. The pump unit 4 supplies the hydraulic oil to the hydraulic cylinder device 5 via the flexible tube 41, supplies the hydraulic oil to the hydraulic chamber of the hydraulic cylinder device 5, and raises the hydraulic pressure of the upper hydraulic chamber of the hydraulic cylinder device 5. . The hydraulic cylinder device 5 extends the piston rod 50 and lowers the enlarged head portion 51 and the movable blade assembly 10, and the movable blade 10a cooperates with the fixed blade assembly 11 to work (L-shaped steel material). W is sheared (cut). The rotating shaft 90 descends together with the piston rod 58. When the piston 51 descends by a predetermined ascending / descending stroke, the LS dog 92 on the rotating shaft 90 comes into contact with the detector of the limit switch LS. The electromagnetic solenoid 60 is demagnetized for a predetermined time, releases the hydraulic pressure release valve, and releases the pressure oil in the upper hydraulic chamber 52 of the hydraulic cylinder device 5. As a result, the hydraulic cylinder device 5 causes the built-in return spring (not shown) to raise the expansion head portion 51 and the movable blade assembly 10 to the initial position shown in FIG.

After the work W is cut into a predetermined length in this way, the movable blade assembly 10 and the fixed blade assembly 11 are removed from the enlarged head portion 51 and the tool supporting table 25, and the notch punching tool and the punching die are formed. (Not shown) are attached to the enlarged head portion 51 and the tool supporting table 25, respectively. By the above operation of the press molding machine 1, the notch punching tool and the punching die punch the notch K (FIG. 7A) in the work W. After punching the notch K, the notch punching tool and the punching die are removed from the enlarged head portion 51 and the tool supporting table 25, and the shaping tool assembly 100 is mounted on the tool supporting table 25. The forming tool assembly 100 is positioned on the work plane T along a guide groove (not shown) formed on the work plane of the tool support table 25 or the support plane T, and is operated by a positioning pin (not shown). It is fixed in place on the plane T. As shown by an imaginary line in FIG. 4, the work W having the notch K punched and formed is inserted between the movable tool 140 and the fixed tool 150. The first cylinder device 110 of the molding tool assembly 100 is aligned on the axis X-X of the press molding machine 1, and the piston upper end surface 116 faces the enlarged head portion 51. The above-described operation of the press molding machine 1 causes the expansion head portion 51 to descend, the lower end surface of the expansion head portion 51 presses the piston upper end surface 116 downward, and the vertical driving force Fv of the press molding machine 1 (Fig. 5). Is input to the piston 113. The piston 113 descends against the compression spring 118 and pressurizes the hydraulic oil in the first hydraulic chamber 117. The hydraulic oil in the first hydraulic chamber 117 is fed to the second hydraulic chamber 127 via the oil passage 122 to pressurize the second hydraulic chamber 127. As a result, the piston 123 moves forward against the compression spring 128, the piston rod 126 extends from the second cylinder device 120, and the movable tool 140 moves forward toward the fixed tool 150. Thus, as shown in FIG. 5, the vertical driving force Fv of the press molding machine 1 is transmitted to the movable tool 140 as the horizontal driving force Fh, and the movable tool 140 is fixed by the horizontal reaction force F ′ of the jaw portion 132. The work W is bent at a right angle in a horizontal plane in cooperation with the tool 150. As is clear from the contours of the movable tool 140 and the fixed tool 150, the work W bends in a direction away from the work area of the press molding machine 1, so that the components of the press molding machine 1 interfere with the work of deforming the work W. do not do. Further, as is clear from the power transmission path and the driving force / reaction force direction, bending stress is generated in the movable tool 140, the fixed tool 150, the enlarged head portion 51 of the press molding machine 1 and the piston rod 50. do not do.

When the press molding machine 1 raises the expansion head portion 51, the compression spring 118 raises the piston 113 to the initial position, and the compression spring 128 retracts the movable tool 140 and the movable tool 140 to the initial position. . 5 and 6 are a longitudinal sectional view and a partial plan view showing a second embodiment of a forming tool assembly including the power transmission device of the present invention. As shown in FIG. 5, the forming tool assembly 200 includes a vertically oriented first cylinder device 210 and a horizontally oriented second cylinder device 220. The first cylinder device 210 includes a cylindrical cylinder case 211 having a cylinder bore, and a lower end surface of the cylinder case 211 has a horizontal table mounting surface 212. A vertical reciprocating piston 213 is arranged in the cylinder case 211, and the piston 213 slides vertically along the inner peripheral surface of the cylinder bore. The upper end portion of the piston 213 projects upward from the cylinder case 111, and the horizontal piston upper end surface 216 constitutes a plane for inputting molding power. The cylinder bore vertically penetrates the cylinder case 211 and opens on the table mounting surface 212. The peripheral wall of the cylinder case 211 is provided with a side opening 214, and the annular member 219 is locked in the opening 214.

The second cylinder device 220 includes a cylindrical cylinder case 221 having a cylinder bore. The rear end surface of the cylinder case 221 is formed integrally with the cylinder case 211, and the lower end surface of the cylinder case 221 is continuous with the horizontal table mounting surface 212. A horizontal reciprocating piston 223 is arranged in the cylinder case 221. The piston 223 is aligned with the opening 214 of the cylinder case 211 and slides horizontally along the inner peripheral surface of the cylinder bore. An air chamber 229 opened to the atmosphere is formed between the front end surface of the piston 223 and the tool connecting portion 230. A compression spring 228 is arranged in the air chamber 229. The compression spring 228 is inserted between the front end surface of the piston 223 and the annular wall of the tool connecting portion 230, and always biases the piston 223 rearward. The rear end portion of the piston 223 is a cylinder. It is always in contact with the annular member 219 of the case 211. A piston rod 226 extends concentrically and forward from the front end surface of the piston 223 and penetrates the tool connecting portion 230. The tool connecting portion 230 is integrally connected to the front end flange portion of the cylinder case 221 by a plurality of fixing bolts 235. A guide groove 231 is formed between the outer peripheral surface of the piston rod 226 and the rod through hole of the tool connecting portion 230 to allow fluid communication between the outside region of the machine and the atmosphere chamber 129. The key 226a fitted to the outer peripheral portion of the piston rod 226 is slidably engaged with the guide groove 231.

The movable tool 240 engages with the small diameter protrusion 226a protruding from the front end surface of the piston rod 226, and is locked to the small diameter protrusion 226a by the locking pin 226b. As shown in FIG. 5, the movable tool 240 is a bending tool for bending an L-shaped steel material, and has a vertical groove 241 and a vertical surface 242 similar to those of the movable tool 140. A fixed tool 250 facing the movable tool 240 is removably fixed to the upper protrusion 231 of the jaw 232. The fixed tool 250 is a bending die for L-shaped steel material, and has a vertical surface 252 and a tip portion 251 like the fixed tool 150. As shown in FIG. 5, the jaw portion 232 integrally connected to the lower end portion of the tool connecting portion 130, as in the case of the jaw 132, is a horizontal movable member that guides the movable tool 140 in the expansion / contraction direction of the piston rod 126. A tool sliding plane 233 is provided. In the present embodiment, the piston 213 has a first power transmission plane 217 inclined at a predetermined angle with respect to the central axis of the first cylinder device 210, for example, 45 °, and the piston 223 has A second power transmission plane 227 is provided that is in sliding contact with the power transmission plane 217. The second power transmission plane 227 is inclined at a predetermined angle with respect to the central axis of the second cylinder device 220, for example, 45 °. The first and second power transmission planes 217, 227 are polished to a desired degree, preferably 2. The surface roughness is 0 micron (μm) or less, more preferably 1.5 micron (μm) or less.

The forming tool assembly 200 of this embodiment also has the same shape as the forming tool assembly 100 after the punching process of the notch K by the notch punching tool and the punching die is completed. It is fixed at a predetermined position on the work plane T. The piston 213 of the first cylinder device 210 is aligned on the axis X-X of the press molding machine 1 and is pushed downward by the lowering of the expansion head portion 51. The first power transmission plane 217 of the piston 213 transmits the driving force Fv to the second power transmission plane 227 of the piston 223. Therefore, the vertical driving force Fv of the press molding machine 1 acting on the piston 213 is converted into the horizontal driving force Fh acting on the piston 223 and transmitted to the movable tool 240, and the movable tool 140 cooperates with the fixed tool 150. Then, the work W is bent at a right angle in a horizontal plane. When the press molding machine 1 raises the expansion head portion 51, the compression spring 228 retracts the piston 223 to the initial position, and the piston 223 raises the piston 213 to the initial position.

[0023]

[Effect of device]

 As described above, according to the power transmission device of the present invention, the driving force of the press molding machine can be diverted in the desired movement direction of the movable molding tool. Therefore, it is possible to perform a forming operation such as a bending operation in the outer area of the operation area of the press forming machine without causing an excessive bending stress in the forming tool. Further, according to the power transmission device of the present invention using the fluid pressure or the sliding contact surface, the power loss in the power transmission path can be minimized. Further, according to the forming tool assembly or the press forming machine having the above configuration, the direction of the forming power is changed to a desired direction, and the forming power is transmitted to the outside of the preset working area of the press forming machine. Therefore, it becomes possible to perform the molding operation in a desired work area other than the predetermined work area of the press molding machine. Therefore, the degree of freedom in bending work is greatly improved, which is extremely advantageous in practical use.

[Brief description of drawings]

FIG. 1 is a perspective view of a press molding machine according to an embodiment of the present invention.

FIG. 2 is a side view of the press molding machine shown in FIG.

FIG. 3 is a vertical sectional view showing a first embodiment of a forming tool assembly including the power transmission device of the present invention.

4 is a partial plan view of the forming tool assembly shown in FIG. 1. FIG.

FIG. 5 is a vertical cross-sectional view showing a second embodiment of a forming tool assembly including the power transmission device of the present invention.

6 is a partial plan view of the forming tool assembly shown in FIG.

FIG. 7 is a perspective view schematically showing a step of bending an angle-shaped steel material.

FIG. 8 is a perspective view showing a schematic configuration of a conventional press molding machine.

[Explanation of symbols]

 1 Press Forming Machine 2 Machine Frame 3 Electric Motor 4 Pump Section 5 Hydraulic Cylinder Device 6 Hydraulic Release Device 7 Oil Storage Device 8 Locking Device 9 Lifting Regulator 10 Movable Blade Assembly 11 Fixed Blade Assembly 100, 200 Forming Tool Assembly 110, 210 1st cylinder device 111, 211 Cylinder case 120, 220 1st cylinder device 121, 221 Cylinder case 113, 123, 213, 223 Reciprocating piston 116, 216 Piston upper end surface 117 1st hydraulic chamber 118, 128, 228 Compression spring 126, 226 Piston rod 127 Second hydraulic chamber 140, 240 Movable tool 150, 250 Fixed tool 217 First power transmission plane 227 Second power transmission plane

Claims (35)

[Scope of utility model registration request] 1. A power transmission device for a molding tool, comprising: a first reciprocating member that reciprocates in the first direction when receiving a molding power or a molding load transmitted in a first direction; and a movable molding tool. And a second reciprocating member that reciprocates in a second direction that forms a predetermined angle with respect to the first direction, and power diverting means that is interposed between the first and second reciprocating members. The first reciprocating member has an input portion that can come into contact with the driving member of the press molding machine, the power diverting means is hydraulic pressure, and the first and second reciprocating members form a pair. It is composed of first and second pistons of the first and second hydraulically actuated cylinder devices, a lower end of the first piston defines a first hydraulic chamber, and a rear end surface of the second piston is
Defining a second hydraulic chamber, the first hydraulic chamber communicating with a second hydraulic chamber, the first cylinder device being vertically oriented,
An upper end portion of the piston forms an input portion, a piston rod extends in a second direction from a front end surface of the second piston, and the movable forming tool is attached to a tip end portion of the piston rod. Power transmission device. 2. A biasing means for biasing the first piston to a raised position and to bias the second piston to a retracted position is provided, and the biasing means is disposed in the first hydraulic chamber. A first compression spring, wherein the first compression spring is the first compression spring.
The urging means is interposed between the lower end surface of the piston and the bottom wall of the first hydraulic chamber, and the urging means further has a second compression spring arranged in the second hydraulically actuated cylinder device. The power transmission device for a molding tool according to claim 1, wherein the compression spring is interposed between a front end surface of the second piston and a front end wall of the second hydraulically actuated cylinder device. 3. A power transmission device for a molding tool, comprising: a first reciprocating member that reciprocates in the first direction when receiving a molding power or a molding load transmitted in a first direction; and a movable molding tool. And a second reciprocating member that reciprocates in a second direction that forms a predetermined angle with respect to the first direction, and power diverting means that is interposed between the first and second reciprocating members. The first reciprocating member has an input portion that can come into contact with a driving member of the press molding machine, and the power diverting means includes an inclined end surface of the first reciprocating member and an inclination of the second reciprocating member. An end surface, the inclined end surface of the first reciprocating member is inclined at a predetermined angle with respect to the first direction, and the inclined end surface of the second reciprocating member is predetermined with respect to the second direction. The first and second slanting end surfaces have slanting angles capable of sliding contact with each other. The two reciprocating members are the first and second pairs.
The first cylinder case is vertically arranged, the upper end surface of the first reciprocating member forms an input surface for transmitting power of the press molding machine, and the piston rod is the first cylinder case. 2 From the front end face of the reciprocating member to the second
Direction, the movable forming tool is attached to the tip end portion of the piston rod, and the urging means for urging the second reciprocating member rearward is disposed in the second cylinder case, and the second reciprocating member is provided. The power transmission device for a molding tool, wherein the inclined end surface arranged at the rear end is in sliding contact with the inclined end surface arranged at the lower end of the first reciprocating member. 4. An atmosphere chamber opened to the atmosphere is defined between a front end surface of the second piston and a front end wall of the second cylinder case, and the urging means includes a front end surface of the second reciprocating member. And a front end wall of the second cylinder case, the front end wall of the second cylinder case has a piston rod through hole, and the guide groove extends parallel to the second direction. The power transmission device for a molding tool according to claim 3, wherein a key is formed on an inner peripheral surface of the through hole, and a key engaging with the guide groove is attached to an outer peripheral portion of the piston rod. 5. A power transmission device for a molding tool used in a press molding machine, comprising: a first reciprocating member that reciprocates in the first direction when receiving a molding power or a molding load transmitted in the first direction. A second reciprocating member connected to the movable forming tool and reciprocating in a second direction forming a predetermined angle with respect to the first direction, and interposed between the first and second reciprocating members. A first power reciprocating member, the first reciprocating member has an input unit capable of inputting a driving force of the press molding machine, and the second reciprocating member has a driving member transmitting the driving force. A power transmission device for a molding tool, which is connected to the movable molding tool. 6. The molding according to claim 5, wherein the drive member of the press molding machine is a reciprocating member connected to a piston or a working ram of a fluid actuated cylinder device of the press molding machine. Tool power transmission device. 7. The first reciprocating member is disposed in a first casing aligned with a driving member of the press molding machine,
Is guided in the first direction in the first casing,
The power transmission of the forming tool according to claim 5, wherein the reciprocating member is arranged in a second casing oriented in the second direction and guided in the second direction in the second casing. apparatus. 8. The first reciprocating member is a piston,
8. The first casing includes a cylinder bore that accommodates the piston so that the piston can reciprocate, and the cylinder bore includes an inner peripheral wall that is in sliding contact with the piston.
A power transmission device for a molding tool according to. 9. The second reciprocating member is a piston,
9. The second casing includes a cylinder bore that accommodates the piston so that the piston can reciprocate, and the cylinder bore includes an inner peripheral wall that is in sliding contact with the piston.
A power transmission device for a molding tool according to. 10. The power transmission device for a molding tool according to claim 5, wherein the first direction and the second direction are directions orthogonal to each other. 11. The power transmission device for a forming tool according to claim 5, further comprising an angle adjusting unit for adjusting an intersecting angle between the first direction and the second direction. 12. The input portion of the first reciprocating member is an end face of the first reciprocating member that abuts a driving member of the press molding machine, and the end face constitutes a power input plane orthogonal to the first direction. The power transmission device for a forming tool according to claim 5, wherein: 13. The second reciprocating member comprises a piston rod extending in a second direction, and the movable forming tool is integrally connected to a tip end portion of the piston rod. A power transmission device for a molding tool according to. 14. The second reciprocating member is arranged in a casing oriented in the second direction, is guided in the casing in the second direction, and has a piston rod extending in the second direction. The movable forming tool is integrally connected to a reciprocating member, the movable forming tool is integrally connected to a tip end portion of the piston rod, and the casing includes a tool support portion that supports a fixed forming tool extending in a second direction. The power transmission device for a molding tool according to claim 5, wherein 15. The power diverting means is fluid pressure, and the first and second reciprocating members are paired first and second.
The fluid actuated cylinder device comprises first and second pistons, a lower end portion of the first piston defining a first fluid pressure chamber, and a rear end surface of the second piston defining a second fluid pressure chamber. The power transmission device for a molding tool according to claim 5, wherein the first fluid pressure chamber and the second fluid pressure chamber communicate with each other. 16. The power transmission device of a forming tool according to claim 15, wherein the fluid pressure is hydraulic pressure. 17. The first cylinder device is vertically oriented, an upper end portion of the first piston forms a power input portion, and a piston rod extends from a front end surface of the second piston in a second direction. The power transmission device for a molding tool according to claim 15, wherein the movable molding tool is attached to a tip portion of the piston rod. 18. A biasing means is provided in both or one of the first fluid pressure chamber and the second fluid pressure chamber for biasing the first piston to a raised position and the second piston to a retracted position. The power transmission device for a molding tool according to claim 17, wherein the power transmission device is provided. 19. The urging means includes a first compression spring arranged in the first fluid pressure chamber, the first compression spring including a lower end surface of the first piston and a first fluid pressure chamber. The power transmission device for a forming tool according to claim 18, wherein the power transmission device is interposed between the bottom wall and the bottom wall. 20. The urging means includes a second compression spring arranged in the second cylinder device, the second compression spring including a front end surface of the second piston and the second compression spring.
The power transmission device for a forming tool according to claim 18, wherein the power transmission device is interposed between the front end wall of the cylinder device and the front end wall. 21. A front end surface of the second piston and the second piston
An atmosphere chamber opened to the atmosphere is defined between the front end wall of the cylinder device, and a compression spring is interposed between the front end surface of the second piston and the front end wall of the second cylinder device. The power transmission device for a forming tool according to claim 15. 22. The power turning means comprises an inclined end surface of the first reciprocating member and an inclined end surface of the second reciprocating member, and the inclined end surface of the first reciprocating member with respect to the first direction. The inclined end faces of the second reciprocating member are inclined at a predetermined angle, the inclined end faces of the second reciprocating member are inclined at a predetermined angle with respect to the second direction, and the inclined end faces are in sliding contact with each other. The power transmission device for a molding tool according to item 5. 23. The power transmission device for a forming tool according to claim 22, wherein the predetermined angle is set to an angle of 45 °. 24. The inclined end surface is finished to have a surface roughness of 2.0 μm or less.
2. The power transmission device for a molding tool according to item 2. 25. The inclined end surface is finished to have a surface roughness of 1.5 μm or less.
The power transmission device for a molding tool according to item 4. 26. The first and second reciprocating members are respectively disposed in a pair of first and second cylinder cases, the first cylinder case being vertically oriented, and the first reciprocating member. An upper end surface of the press forming machine forms an input surface for transmitting power of the press molding machine, and a piston rod is formed from the front end surface of the second reciprocating member to the second end.
23. The power transmission device for a molding tool according to claim 22, wherein the movable molding tool extends in a direction and is attached to a tip portion of the piston rod. 27. An urging means for urging the second reciprocating member rearward is arranged in the second cylinder case, and the inclined end surface arranged at the rear end of the second reciprocating member is 27. The power transmission device for a molding tool according to claim 26, wherein the power transmission device is pressed against the inclined end surface arranged at the lower end of the first reciprocating member. 28. The front end surface of the second piston and the second piston
An atmosphere chamber that is open to the atmosphere is defined between the front end wall of the cylinder case and the urging means is interposed between the front end surface of the second reciprocating member and the front end wall of the second cylinder case. 28. A compression spring, comprising:
A power transmission device for a molding tool according to. 29. The front end wall of the second cylinder case is
A guide groove having a piston rod through hole and extending parallel to the second direction is formed on an inner peripheral surface of the through hole, and a key engaging with the guide groove is attached to an outer peripheral portion of the piston rod. 29. The power transmission device for a forming tool according to claim 28. 30. A machine frame defining a work area, an upper drive device supported by the machine frame, a lifting drive member of the drive device connectable to a movable forming tool, and a fixed forming tool can be supported. In a press molding machine having a support table, the elevating and lowering drive member of the drive device is aligned on a first vertical axis of the machine frame extending in the vertical direction, and a molding tool assembly is arranged on the support table. The molding tool assembly includes a power transmission device, and the power transmission device includes a first reciprocating member having an input portion capable of abutting on a lifting drive member of the press molding machine. The reciprocating member reciprocates in the first direction by the molding power or the molding load transmitted in the first direction, and the power transmission device is connected to the movable forming tool and has a predetermined direction with respect to the first direction. Reciprocating in the angled second direction It further has a reciprocating member and a power diverting means interposed between the first and second reciprocating members, wherein the second reciprocating member is a reciprocating member connected to a movable forming tool. A press molding machine characterized by comprising. 31. The upper drive device includes a hydraulic cylinder device connected to a hydraulic pump device, the lifting drive member includes a piston rod of the hydraulic cylinder device, and the hydraulic pump device includes the hydraulic cylinder device. 31. The press molding machine according to claim 30, wherein hydraulic oil is supplied to the piston rod to lower the piston rod. 32. A movable forming tool and a fixed forming tool that cooperate with each other to process a workpiece, and a power transmission device that operates the movable forming tool and supports the fixed forming tool at a predetermined position, The transmission device includes a first reciprocating member that reciprocates in the first direction by the molding power or a molding load transmitted in the first direction, and a first reciprocating member that is connected to the movable forming tool and forms a predetermined angle with respect to the first direction. A second reciprocating member that reciprocates in a second direction, and power diverting means interposed between the first and second reciprocating members, wherein the first reciprocating member is a press molding machine. Forming tool assembly, wherein the second reciprocating member comprises a driving member for driving the movable forming tool. 33. The forming tool assembly according to claim 32, wherein the movable forming tool is a bending forming tool and the fixed forming tool is a bending forming die. 34. The forming tool assembly according to claim 32, wherein the movable forming tool is a movable cutting tool and the fixed forming tool is a fixed cutting tool. 35. The forming tool assembly according to claim 32, wherein the movable forming tool is a punch and the fixed forming tool is a punch forming die.