KR20100002619A - Punch press apparatus - Google Patents

Abstract

PURPOSE: A punch press device is provided to perform a pressure plastic process in a short time through the control action of a plurality of servo motors. CONSTITUTION: A punch press device comprises a main body(2), and a shaft member supply and a die(4). An end of the shaft member is projected from the processing location of the inner part of the main body. The shaft member end is automatically transported with the shaft member transfer device in the axial direction. The shaft member transfer device is located on the head side end part of the main body. The die is located around the processing location of the shaft member supply. The end of the shaft member is cut in the direction meeting with the axial direction at right angle. The cutting action is controlled by a first servo motor.

Description

Punch Press Device {PUNCH PRESS APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press apparatus, and more particularly, to a turret type punch press apparatus for continuously processing workpieces such as shaft members with a die mold while allocating a plurality of punch molds.

In this type of punch press device, a punch for performing a desired punching process on a work such as a plate, an upper and lower turret equipped with a die, a striker freely moving up and down to pressurize the punch, and the workpiece And a workpiece movement positioning device for positioning and moving in the Y-axis direction, and a plurality of processings are known after one allocation positioning of the upper and lower turrets (see Patent Document 1).

In more detail, this punch press apparatus improves processing efficiency by shortening the allocating time which required a lot of time conventionally when allocating a pair of metal mold | die (punch and die) to a process area | region, The upper turret supporting the punch and the lower turret supporting the plurality of dies corresponding to the punch are freely rotatable, and the punches allocated to the machining area by the rotation of the two turrets, the upper pressure free striker It is provided with the workpiece | work movement positioning apparatus which is freely provided up and down in the upper position of a turret, and which is free to positionally move the workpiece | work processed by a punch and a die in the X-axis and Y-axis direction.

And by the turret punch press provided with the workpiece | work movement positioning apparatus which the workpiece processed by a punch and die is free to move in the X-axis and Y-axis direction, in the several upper mold holder detachably attached to the upper and lower turrets, A plurality of corresponding punches and dies are mounted in two dimensions, and upper and lower turret holders are freely provided for positioning in the machining area by rotation of the upper and lower turrets, and are supported by the upper mold holders positioned and positioned in the machining area. The striker for hitting a plurality of punches present is freely provided in the X-axis and Y-axis directions.

In this way, a plurality of punches and dies corresponding to the upper and lower mold holders detachable from the upper and lower turrets in the turret punch press are mounted two-dimensionally, and the striker is supported by the upper mold holder positioned and allocated to the machining area. It is provided to move freely in the X-axis and Y-axis directions to squeeze a plurality of punches. A plurality of types of processing can be carried out by moving the striker to a position above the punch in the punches and dies of the determined upper and lower die holders, and then positioning the striker.

Patent Document 1: Japanese Patent Application Laid-Open No. 6-77780 (Page 2 left column, Page 3 right column and FIGS. 1 and 6)

By the way, this type of punch press apparatus uses a vertically movable striker and a plate work that presses the punch against the punch and die of the upper and lower mold holders positioned by rotational allocation of the upper and lower turrets in the X-axis direction, Since it is configured to move and position in the Y-axis direction, an unsolved problem remains in terms of improving processing efficiency, such as requiring a large amount of time for moving and positioning the striker or workpiece. Is not developed as a punch press device.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and mechanically coordinated operation of allocating the cutting shaft member cut and supplied to the die side under the control of a plurality of servomotors and rotationally allocating the retracting movement of a holder supporting a plurality of punches. It is an object of the present invention to provide a punch press device capable of performing pressurized plastic working in a short time.

In order to solve the above object, the punch press device according to claim 1 of the present invention is configured to support a plurality of punches on a holder supported rotatably around a rotating shaft at a machining position on a die front surface. In a punch press device in which the tip of the shaft member is pressed in order by sequentially moving forward and backward in the axial direction while sequentially assigning the shaft member on the same axis line,

In the punch press apparatus 1, the front end of the long shaft member 10 which is automatically conveyed in the axial direction by the shaft member conveying apparatus BF provided at the head end of the punch press main body 2 is the punch press main body. (2) the die 4 provided in the shaft member supply port 12 which protrudes quantitatively in the internal processing position 8, the machining position 8 of the said shaft member supply port 12, and The tip of the long shaft member 10 protruding quantitatively from the shaft member supply port 12 by the control of the first servomotor is cut to a predetermined length by a movement orthogonal to the axial direction, and the cut shaft member W is cut. The cutting work supply device T which supports and moves to the machining position 8 just before the said die, and the several type N punches 38, 48, 50 ... uniformly supported on the same circumference are provided. Rotation assignment and further movement in the axial direction, each of which is shafted in the small diameter insertion hole 5 of the die 4 The punches 38, 48, 50... Sequentially assigned to correspond in the direction are moved back and forth in the axial direction toward the machining position 8, and the punched portion of the shaft member W positioned at the machining position 8 is moved. It consists of the holder H which presses a front-end | tip and bakes the edge part,

The holder H is in the axial direction via a crank mechanism CR that cooperates with the crankshaft 34 that is rotationally driven by the control of the second servomotor 110 on the tail side of the punch press main body 2. While being supported by the rotary shaft 58 axially supported at the tip of the ram 56 moving forward and backward, the rotation transmitted from the end side of the crankshaft 34 to the input shaft 79 is converted into an assignment operation. The die H has an output shaft 116 and the holder H is in a retracted position through the rotation shaft 58 by a pair of gears G1 and G2 mounted to the output shaft 116 and the rotation shaft 58. It is a punch press device characterized by including the rotation allocation device 60 which sequentially performs the assignment operation | movement with respect to the small diameter insertion hole 5 of (4).

According to the said punch press apparatus, by the control of the 1st servomotor 104, the cutting shaft member W which cut | disconnected the cutting workpiece supply apparatus T to a fixed length by the movement orthogonal to an axial direction, the said die | dye (4) Positioning support is carried out at the machining position 8 immediately before. Next, by the control of the second servomotor 110, the holder H is opposed to the cutting shaft member W positioned and supported immediately before the small diameter insertion hole 5 of the die 4 on the axis. An assignment operation of sequentially allocating each of the punches 38, 48, and 50 supported on the upper surface; and the machining positions 8 of the cutting shaft member W and the front surface of the die 4, respectively. The tip of the cutting shaft member W is pressurized by a mechanical synchronous operation of the holder H to move forward and backward.

According to the invention as set forth in claim 1, under the control of a plurality of servomotors, the cutting shaft member cut to a predetermined length from the long shaft member and supplied to the machining position immediately before the die is moved forward and backward of the holder supporting the plurality of punches. By the mechanical cooperation operation | movement which assigns a movement and rotation, the pressurized plastic working which consists of a some process can be performed in a short time.

An embodiment of the present invention will be described below.

EXAMPLE

Referring to the embodiments of the present invention with reference to the drawings, FIG. 1 is a partial cross-sectional view of the punch press device main body according to the embodiment of the present invention from the front side, FIG. AA sectional view which looked at the member conveyance apparatus from the front, FIG. 4 is a sectional plan view which shows the relationship of the cutting workpiece supply apparatus and the knockout mechanism which protrudes the shaft member press-processed by the punch of a holder, and FIG. 5 is an embodiment of this invention. Fig. 6 is a partial sectional view of the punch press device in the embodiment of the present invention seen from the back side, Fig. 7 is a sectional view showing the internal structure of the cutting workpiece supply device, Fig. 8 Is a cross section at the punch press main body tail side showing a rotation allocating device for converting the rotation of the crank mechanism or the crank mechanism into tri-allocation operation controlled by the second servomotor. 9A is a planar cross-sectional view showing the relationship between the punch and the die for the intermediate process attached to the holder, and (B) is a planar cross-sectional view showing the relationship between the punch and the die for the finishing process attached to the holder. (A) is explanatory drawing of a first stroke, (B) is explanatory drawing of an intermediate process, (C) is explanatory drawing of a finishing process.

First, as shown in FIG. 1, as shown in FIG. 1, at the head side edge part of the punch press main body 2, the shaft member conveying apparatus BF which automatically conveys the long shaft member 10 to the axial direction is provided. Excreted. On the punch press main body 2 side of this shaft member conveying apparatus BF, the said long shaft member 10 is intermittently intermittently through the shaft member supply port 12 to the machining position 8 inside the punch press main body 2. The intermittent conveying apparatus 15 (refer FIG. 2, FIG. 3) mentioned later attached to the wall surface 2a is attached.

In FIGS. 2 and 3, the intermittent conveying apparatus 15 has a long shaft member 10 forwarded by the shaft member conveying apparatus BF which forwards the long shaft member 10 described later to the front. The machining region of the punch press device 1 is formed by the cooperative action of the opening and closing operation of the moving gripper 15b and the reverse opening and closing operation of the fixed gripper 15a at the moving end moving forward and backward in the forward and backward directions. It is made to intermittently convey toward the axial direction.

Specifically, the intermittent transfer device 15 is a fixed gripper 15a which is composed of a pair of gripping poles that open and close by a drive source such as a servomotor (not shown) to grip the outer circumference of the long shaft member 10. And a pair of gripping poles J1 and J2 gripping the outer circumference of the long shaft member 10 by the servomotor SM2, and repeatedly moving forward and backward in the axial direction by the servomotor SM1. It is comprised by the gripper 15b.

The movable gripper 15b repeatedly swings the shaft member feed lever L in the forward and reverse directions by the servomotor SM1, and a pair of the gripper 15b moves the shaft gripper 15b. A linear slide SL which moves the long shaft member 10 back and forth along the axial direction through a linear guide LM1, and a holding pawl J1 fixed to an inner surface of the upper portion of the linear slide SL; Guided by a pair of linear guides LM2 disposed orthogonally to the axis of the long shaft member 10 on the upper surface of the linear slide SL and up and down by the servo motor SM2 with respect to the gripping pole J1. It consists of the movement holding pole J2 which moves forward and backward.

As shown in FIG. 11, when the intermittent conveying apparatus 15 comprised as mentioned above transfers the long shaft member 10 to an axial direction forward, the fixed gripper 15a becomes an open state and a moving gripper ( 15b) is maintained in the initial state which is open and moved to the retracted position.

In the initial state, the moving gripping pole J2 is moved toward the gripping pole J1 by the servomotor SM2 to hold the long shaft member 10 behind the fixed gripper 15a. Next, the servomotor SM1 is driven to swing the shaft member feed lever L, and the linear slide SL is moved forward by a predetermined amount. As a result, the tip of the long shaft member 10 held by the gripping pole J1 and the moving gripping pole J2 moves into the opposite gripping pole of the fixed gripper 15a in the open state.

Subsequently, the tip of the long shaft member 10 is gripped by the fixed gripper 15a, and the movable gripper 15b is in a state of being opened by the servomotor SM2. It moves to the retracted position via 89, and the intermittent transfer device 15 returns to the initial state.

The moving gripper 15b returned to the initial position grips the outer periphery of the long shaft member 10 sent forward, and the fixed gripper 15a in the open state is moved to the front in a predetermined amount in this state. When the long shaft member 10 is gripped, the moving gripper 15b moves to the retracted position.

Thus, the reverse opening / closing operation of the moving gripper 15b which repeats the opening / closing operation | movement in an axially moving movement end, and the fixed gripper 15a which is synchronized with the opening / closing operation | movement in the axially moving movement end of this moving gripper 15b is performed. By the cooperative action repeatedly performed, the long shaft member 10 is automatically intermittently fed toward the machining position 8 on the front surface of the die 4 via the insertion hole 16a of the guide tube 16 shown in FIG. do.

In addition, as shown in FIG. 4, the small diameter insertion hole 5 of the die 4 has the large diameter hole 25 formed in the back, and the inside of this large diameter hole 25 has a step | paragraph. The pressing shaft member 20 is supported in contact with the fixed position in a state where the pressing shaft member 20 is pressed backward by a compression spring (not shown), and the pressing shaft member 20 inserted into the small diameter insertion hole 5 is The tip end of the small-diameter pressing bar 22 formed at the tip end is positioned inside the rear side of the front end face on the machining region side of the die 4.

In addition, a shaft member 26 is built into the insertion hole 27 behind the pressing shaft member 20, and the shaft member 26 is a portion having a large diameter end formed at a rear end thereof (end portion). The back end which extends rearward from the part with the large diameter end of the said shaft member 26 is moved forward by a predetermined amount by the rocking | fluctuation action of the rocking lever 89 mentioned later. By this forward movement, the knockout operation of projecting the tip of the push rod 22 into the machining region through the shaft member 26 is performed.

The swing lever 89 has a cam follower CF, which is added to the rear by a spring (not shown), and is held in an intermediate portion, always in contact with the outer circumference of the plate cam CM1, The pressing portion 80 at the tip of the swing lever 89 is swinged back and forth through the cam follower CF by the plate cam CM1 that is rotationally driven.

On the other hand, as shown in FIG. 5, the holder H which can be rotationally assigned has a plurality of N types (three types in this embodiment) for the first process punch 38 and an intermediate process on its front surface. The punch 48 and the punch 50 for the finishing process are arranged on the same circumference at equal intervals, and these punches 38, 48, and 50 are in front of the die 4 when the holder H is assigned. It is made to oppose on the center axis line of the small diameter insertion hole 5 used as the processing position of the.

In FIG. 4, the inside of the hollow hole of the first process case body 36 attached to the front surface of the holder H via the flange 36a is inserted into the die shaft by a compression spring (not shown). 4) It is biased forward toward the side, and the rear end of the first process punch 38 abuts against the front end of the pressing shaft 42, and the front end of the first process punch 38 opens the insertion hole at the front. It protrudes more than the front end surface of the said case body 36 through. In addition, the intermediate process punch 48 and the finishing process punch 50 are mentioned later.

Next, the cutting workpiece supply apparatus T is demonstrated with reference to FIG. 4, 6, 7. FIG. In FIG.4, FIG.7, the cutting workpiece supply apparatus T is accommodated in the box 82 provided in the head side back side wall of the punch press apparatus main body 2. As shown in FIG.

As shown in FIGS. 6 and 7, below the box 82 in which the cutting work supply device T is accommodated, the first servomotor 104 is parallel to the head side rear surface of the punch press body 2 and furthermore. It is provided horizontally, and both ends of the camshaft 102 which supported the plate cam CM2 in the middle are rotatably inserted by the said box 82, and are attached in parallel with the said 1st servomotor 104. As shown in FIG.

A timing pulley 107 is attached to the output shaft 14 of the first servomotor 104, and the timing pulley 107 is a timing provided at one end of the cam shaft 102 inserted into and supported by the box 82. It is made to drive rotation through the timing belt 106 interposed between the pulley 105. As shown in FIG.

In the box 82 shown in FIG. 7, the feed shaft 120 which attached the cutting tool 94 to the front end is inserted and supported so that it may orthogonally cross above the said cam shaft 102. As shown in FIG. When the forward movement is started through the feed shaft 120 to be described later by the drive of the first servomotor 104, the cutting tool 94 is a feed motion in a direction orthogonal to the long shaft member 10. The front end of the long shaft member 10 supplied from the head side and protruded quantitatively into the machining position 8 is cut, and the cut shaft member is supported by a circular receiving portion of the cutting tool 94 to support the die 4 The positioning support is performed immediately before the small diameter insertion hole 5 serving as the machining position of the front face.

The support shaft 98 is rotatably supported by the inside lower side of the said box 82, The lower end of the feed lever 90 is hold | maintained by this support shaft 98, and this feed lever 90 is shown in figure. It is biased backward through the spring which is not.

A cam follower 92 is rotatably supported in the middle of the transfer lever 90, and the cam follower 92 is an outer circumference of the plate cam CM2 attached to the cam shaft 102 by the action of the spring. Is always in contact with the feed lever 90 so as to swing back and forth within a predetermined angle through the plate cam CM2 which is driven to rotate through the cam shaft 102 by the rotational drive of the first servomotor 104. It is.

In detail. The feed shaft 120 is supported by the housings 86 and 88 attached to both outer walls of the box 82 so as to be axially slidable through a bush, and in the insertion hole 85 formed at the center of the feed lever, a feed lever. (90) The front end faces the contact portion (a) attached to the front inner wall of the insertion hole (85) in the state where the feed shaft (120) is in the retracted position. 96).

Next, the crank mechanism CR which moves the holder H back and forth in the axial direction through the ram 56 by the drive control of the single second servomotor, and the crank shaft rotation by the crank mechanism CR 1 and 8 will be described in detail with reference to FIGS. 1 and 8.

In FIG. 1, FIG. 8, the 2nd servomotor 110 is provided in the outer wall of the tail side front of the punch press main body 2, and the crank mechanism CR is arrange | positioned inside the tail side of the punch press main body 2. In FIG. It is.

In the crank mechanism CR, both ends of the crankshaft 34 are rotatably inserted into and supported by the housings 107 and 108 attached to the outer wall in the width direction of the punch press body 2, and the crankshaft 34 The timing pulley 35 is attached to this one end (left side), and the timing pulley 45 attached to this timing pulley 35 and the output shaft 43 of the second servomotor 110 (see Fig. 1). The timing belt 44 is driven to rotate in one direction.

As shown in FIG. 1, the lower end of the crank arm 46 is rotatably supported by the eccentric shaft 34a provided in the center of the said crankshaft 34, and the pivot shaft 114 of the upper end of the crank arm 46 is shown. ), One end of the pair of links 111 and 112 is rotatably pulled together.

The link 111 disposed on the rear side (tail side) of the punch press body 2 is supported by the support shaft 54 at the tip of the bracket 52 attached to the rear end wall surface on the Tenore side, and is disposed forward. The broken link 112 is supported by the rear end of the ram 56. Therefore, when the eccentric shaft 34a rotates one rotation (360 degrees rotation) with the crank shaft 34, the pivot shaft 114 of the crank arm 46 also rotates one rotation.

By one rotational movement of the crank arm 46, the pair of links 111 and 112 are pivoted on the support shaft 54 of the bracket 52 on which one of the links 111 is held. Since it expands and contracts through 114, the ram 56 can be moved back and forth once in the axial direction.

As shown in FIG. 1, FIG. 8, the rotation allocation apparatus 60 is attached to the lower part of the said ram 56 in the center of the inside of the punch press main body 2, and the input shaft 118 of the rotation allocation apparatus 60 is shown. ), A timing pulley 70 is attached to the auxiliary shaft 74 attached thereto. The timing belt 72 is interposed between the timing pulley 70 and the timing pulley 69 attached to the other end of the crankshaft 34.

On the other hand, the holder H is axially held by the rotation shaft 58 at the front end of the ram 56, and the gear G2 is mounted at the rear end of the rotation shaft 58. The wide gear G1 is attached to the output shaft 116 of the rotation allocation device 60, and the teeth G1 and G2 are bitten together.

The rotation assigning device 60 is configured such that the input shaft 118 is rotatable with the rotation of the crankshaft 34. The output shaft 116 of the rotation assigning device 60 has a rotation of the input shaft 118. It is output as a converted rotation, one-third (120 °) rotation of the holder H only when the eccentric shaft 34a is rotated once together with the crankshaft 34 so that the ram 56 is in the retracted position. Synchronous control is available for allocation.

That is, in order to realize this allocating operation, the gear G2 attached to the rotating shaft 58 of the holder H is in the axial direction in engagement with the wide gear G1 with the forward and backward movement of the ram 56. It is possible to slide back and forth within a predetermined stroke (about 25 mm in the embodiment).

In the retracted position of the ram 56, the holder H is subjected to 1/3 assignment. When this assignment operation is completed, the holder H moves forward again with the ram 56 and is pressed against the cutting shaft member W in the die 4 by each punch of the assigned holder H. Machining is performed.

As described above, the detailed pressing processing step will be described later, but in the present embodiment, three types of punching operations on the holder H at the retracted position and the front surface of the die 4 serving as the machining position via the ram 56 are provided. Pressing and firing can be performed by each punch allocated on the holder H in a step of reciprocating three times with respect to the cutting shaft member W positioned at.

Next, a supporting structure for supporting the intermediate process punch 48 and the finishing process punch 50 of the holder H will be described with reference to FIGS. 4, 5, 9, and 10.

In FIGS. 5, 9 (A) and 10 (B), the intermediate body punch 48 has a case body 63 attached to the holder H via the flange 64. Inside the case body 63, the intermediate process punch 48 is positioned and inserted through a detachable stop member S, and the die 4 is placed in front of the intermediate process punch 48. A small diameter pressing portion 48a is integrally formed toward the) side.

5, 9B and 10C, the case body 66 is provided through the flange 68 in the punch 50 for the finishing process. The inside of the case body 66 is positioned and inserted into the housing 78 through a stop member S that can be attached and detached, and the pressing shaft 71 is provided in the hollow hole 73 formed in the inside of the housing 78. It is biased forward toward the die 4 via this compression spring SP, and in front of the pressing shaft 71, a small diameter finishing process punch 50 projects slightly from the front end surface through the insertion hole 81. It is in a state.

Then, three kinds of first process punches 38, intermediate process punches 48, and finishing processes attached to the same circumference centering on the rotating shaft 58 of the holder H in three equal times. The punch 50 is inserted into the machining position of the die 4 in the order of processing from the punch 38 for the first process by the rotation allocation operation of the holder H by the rotation allocation device 60 shown in FIG. 8. Positioning is made on the axis of the hole 5.

Next, the operation of the punch press apparatus will be described with reference to FIG. Fig. 11 is a timing diagram showing a process of each apparatus for positioning a cutting shaft member cut from a long shaft member on a die front surface and pressing and plasticizing the tip by pressing action of various punches sequentially assigned.

In Fig. 4, the punch press apparatus 1 starts to operate from an initial state,

As described above, the long shaft member 10 is automatically fed axially forward toward the machining area of the punch press device 1 by the cooperative action of the shaft member conveying device BF and the intermittent conveying device 15.

When the long shaft member 10 is intermittently conveyed by the intermittent conveying apparatus 15, the tip protrudes from the opening end of the shaft member supply port 12 to the fixed amount machining position 8. In this state, when the first servomotor 104 is driven as shown in Figs. 4 and 7, the plate cam CM2 is rotated so that the feed lever 90 swings counterclockwise to attach to the tip thereof. The contact member 96 is pressed by the part 90a.

Thereby, the feed shaft 120 forwards and feeds in the direction orthogonal to the shaft member supply port 12, and is cut out from the opening end of the shaft member supply port 12 by the cutting tool 94 at the tip of the feed shaft 120. The tip of the protruding long shaft member 10 is cut.

The cutting shaft member W which has been cut is further moved forward even in the state supported by the circular receiving part of the cutting tool 94 by the feed operation of the feed shaft 120, and becomes the machining position of the front surface of the die 4. Positioning support is performed just before the insertion hole 5.

Next, in FIGS. 1, 6, and 8, when the second servomotor 110 is driven, the crankshaft 34 constituting the crank mechanism CR is driven to rotate so that the eccentric shaft 34a performs the eccentric rotational movement. Do it. As a result, the crank arm 46 rotates, and the pair of links 111 and 48, which are pushed to the distal end of the crank arm 46, expands and contracts through the pivot shaft 114 with the support shaft 54 as a point. Then, the ram 56 is moved back and forth in the axial direction in the range of, for example, about 25 mm.

That is, when the crank shaft 34 is driven to rotate, the ram 56 cuts the shaft member by various punches assigned as described below in units of 360 ° while drawing a sine curve by the crank motion of the eccentric shaft 34a. Pressurized plastic working is performed on (W).

At the same time, when the crankshaft 34 is driven to rotate, the input shaft 118 of the rotation allocation device 60 is driven to rotate through the timing pulleys 69 and 70 spanned by the timing belt 72.

The rotation input to the input shaft 75 of the rotation allocation device 60 is to be output as a rotation converted from the output shaft 116 of the rotation allocation device 60, the rotation output from the output shaft 116, The gears G1 and G2 are transmitted to the holder H via the rotation shaft 58 as an allocating operation of 120 °.

In the rotation allocation device 60, the rotation of the crankshaft 34 is input to the input shaft 75, and the eccentric shaft 34a by the rotational drive of the crankshaft 34 performs the crank motion, and the ram 56 Output shaft 116 such that when the holder H is moved to the retracted position by interposing 180 ° and drawing a sine curve, the holder H immediately starts to rotate 120 ° (1/3 times) in the same direction continuously. Is output from

The holder H is rotated in one direction continuously in the range of 360 °, but is rotated 120 ° (1/3 times) in a section of 140 ° so that the selected punch is assigned. In the remaining range of 220 °, the rotational allocation operation is stopped, and pressing processing of the cutting shaft member W is performed by the punch allocated by the forward operation of drawing a sine curve of the ram 56.

More specifically, by this forward movement, the assigned first process punch 38 moves toward the machining position of the die 4, and the shaft member supported by the circular receiving portion of the cutting tool 94 ( W) is pressed against the tip of the punch 38 for the first process, when the tip is inserted into the insertion hole 5 of the die 4, it contacts the push rod 22, and both ends of the shaft member W are first. It is fitted by the tip of the process punch 38 and the pressing rod 22, and the first process is performed on the shaft member W.

Thus, in the first step, the shaft member W supported by the circular receiving portion of the cutting tool 94 is enlarged in the center as shown in FIG. W1) is formed into a shape.

Subsequently, the intermediate process punch 48 and the finishing process punch 50 are successively performed while repeating the assignment operation of the ram 56 and the holder H in the same rotational direction as described above. Pressurized plastic working is performed on the cutting shaft member (W).

In the intermediate process, the holder H moved backward through the ram 56 is rotated 120 ° in the same direction by the rotation allocating device 60, and the punch 48 for the intermediate process dies 4. The holder H moves forward again when it is allocated on the axis of the small-diameter insertion hole 5 of (). Thus, as shown in Fig. 9A, the shaft member W after the first step is inserted in and supported in the state where the tip thereof is in contact with the pressing rod 22 inside the small-diameter insertion hole 5. Pressing is performed by the front end 48a of the intermediate process punch 48 at the rear end of the.

Thus, in the intermediate step, the large diameter portion W2 in which the rear end of the shaft member W supported in the small diameter insertion hole 5 of the die 4 is enlarged at the rear end as shown in FIG. It is formed as a shape having.

In the finishing step, the holder H moved backward through the ram 56 is rotated 120 ° in the same direction by the rotation allocating device 60, and the punch 50 for the finishing step dies ( When it is allocated on the axis of the small-diameter insertion hole 5 of 4), the holder H moves forward again. Therefore, as shown in Fig. 9B, the rear end of the shaft member W after the intermediate process, in which the tip is indented and supported in contact with the pressing rod 22 inside the small-diameter insertion hole 5 inside. Pressing is performed by the tip of the punch 50 for the finishing step.

Thus, in the intermediate process, the large diameter portion W3 in which the rear end of the shaft member W supported in the small diameter insertion hole 5 of the die 4 is enlarged at the rear end as shown in FIG. It is formed as a shape having. When the completed work is formed, the holder H is moved back to the rear end again, and a 120 ° turning assignment operation is performed so that the first process punch 38 returns to the initial state.

In this way, while the continuous operation is similarly repeated, an intermediate process and a finishing process are performed, and when these processes are completed, the finished work W in the die 4 is pressed by the knockout operation of the pressing member 20. When protruding into the rod 22 and discharged onto the chute 84, the first servomotor 104 is driven again and at the same time, the cutting tool 94 starts the forward movement to cut the long shaft member 10. do.

As described above, the tip of the long shaft member 10 which is automatically transferred in the axial direction toward the machining region is cut and supported by the cutting work supply device T in a movement orthogonal to the axial direction. The shaft member W sequentially moved to the machining position is positioned between the three types of punches 38, 48, 50 and the die 4 by three allocation operations of the holder H and the axial retraction movement. By repeatedly pressing, machining time can be shortened and machining efficiency can be improved. In this example, an example using three kinds of punches has been shown, but of course, a plurality of machining can be performed by repeating the allocation advancement and movement by the number of steps using a plurality of punches according to the number of machining steps.

Further, it is mounted on the output shaft 116 of the rotation allocation device 60 and the rotation shaft 58 of the holder H, which convert and rotate the rotation of the crankshaft 35 by the second servomotor into a continuous three assignment operation. By exchanging a pair of gears G1 and G2 with a pair of gears whose ratios are changed, the allocation speed of the holder H can be appropriately changed.

BRIEF DESCRIPTION OF THE DRAWINGS The partial cross section view which looked at the punch press apparatus main body in the Example of this invention from the front side.

Figure 2 is a side view of the shaft member conveying device in an embodiment of the present invention.

Fig. 3 is a sectional view taken along the line A-A of the shaft member conveying apparatus in the embodiment of the present invention.

4 is a plan sectional view showing a relationship between a cutting work supply device and a knockout mechanism projecting a finished work pressurized by a punch of a holder;

Fig. 5 is a front view showing the holder of the punch press device in the embodiment of the present invention.

Fig. 6 is a partial cross-sectional view of the punch press device in the embodiment of the present invention as seen from the back side thereof.

7 is a cross-sectional view illustrating an internal structure of a cutting work supply device.

Fig. 8 is a cross-sectional view of the punch press main body tail side showing a rotation allocating apparatus for converting rotation of the crank mechanism or the crank mechanism into an allocating operation, which is rotationally driven controlled by the second servomotor.

Fig. 9A is a planar cross sectional view showing a relationship between an intermediate process punch and a die attached to a holder, and (B) is a plane cross sectional view showing a relationship between a punch and a die for finishing process attached to a holder.

Fig. 10 shows the shaft member pressurizing stroke, (A) is an explanatory view of the first stroke, (B) is an explanatory view of the definition of the intermediate hole, and (C) is an explanatory view of the finishing process.

Fig. 11 is a timing diagram showing each step in the punch press device.

(Explanation of symbols for the main parts of the drawing)

1: punch press device 2: punch press device body

2a: wall 4: die

5: small diameter insertion hole 8: machining position

10: long shaft member 12: shaft member supply port

15: intermittent transfer device 15a: fixed gripper

15b: mobile gripper 16: guide tube

16a: insertion hole 20: pressing shaft member

22: push bar 25: large diameter hole

26 shaft member 27 insertion hole

34: crankshaft 34a: eccentric shaft

35: timing pulley 36: case body for the first process

36a: flange 38: punch for first process

42: compression shaft 44: timing belt

45: Timing Pulley 46: Crank Arm

48: punch for intermediate process 48a: pressurizing part

50: punch for finishing process 52: bracket

54: support shaft 56: ram

58: rotation axis 60: rotation allocation device

3: case body 64: flange

66: case body 68: flange

69, 70: timing pulley 71: pressure shaft

72: timing belt 73: hollow hole

74: auxiliary axis 75: input axis

78: housing 79: input shaft

80: pressurization portion 82: box

84: chute 85: insertion hole

86, 88 housing 90 transfer lever

90a: Pressing portion 92: Cam follower

94: cutting tool 96: contact member

98: support shaft 102: camshaft

104: first servomotor 105: timing pulley

106: timing belt 107, 108: housing

110: second servomotor 111, 112: link

114: pivot shaft 116: output shaft

118: input shaft 120: feed shaft

BF: Shaft member feeder CF: Cam follower

CM1, CM2: Plate Cam CR: Crank Mechanism

G1, G2: Gear H: Holder

J1, J2: Gripping pole L: Shaft member feed lever

LM1, LM2: Linear Guide SM1, SM2: Servo Motor

T: cutting workpiece supply device S: stop member

SP: Compression Spring T: Cutting Walk Feeder

W: Cutting shaft member W1, W2, W3: Large diameter part

Claims (1)

A plurality of punches on a holder supported rotationally about a rotation axis are moved forward and backward in the axial direction while being sequentially allocated on the same axis with respect to the axis member positioned and supported at the machining position on the front face of the die. In the punch press apparatus which pressurized the front end sequentially, The punch press apparatus 1 has a front end of the long shaft member 10 which is automatically conveyed in the axial direction by the shaft member feeder BF provided at the head end of the punch press body 2. 2) the shaft member supply port 12 protruding quantitatively into the machining position 8 therein; the die 4 provided at the machining position 8 near the shaft member supply port 12; and the first servo motor. The tip of the long shaft member 10 protruding quantitatively protruding from the shaft member supply port 12 by control is cut to a predetermined length by a movement orthogonal to the axial direction, and is supported immediately before the die by supporting the cut shaft member W. The cutting work supply device T for moving positioning support to the machining position 8 of the cutting machine, and the plurality of types N punches 38, 48, 50... Direction in the axial direction, and each of the small diameter insertion holes 5 of the die 4 Correspondingly, the punches 38, 48, 50... Sequentially assigned to each other are moved back and forth in the axial direction, and the end portions of the shaft members W positioned at the machining positions 8 immediately before the die are pressed. It consists of a holder (H) for plastic working at the processing position (8), On the tail side of the punch press main body 2, the holder H has an axis line through a crank mechanism CR which cooperates with the crankshaft 34 which is rotationally driven by the control of the second servomotor 110. An output shaft 116 which is supported by the rotation shaft 58 supported at the tip of the ram 56 moving forward and backward, and converts and outputs the rotation transmitted from the end side of the crank shaft 34 to the input shaft 79 in an allocating operation. And each of the punches 38, 48, 50... Through the rotary shaft 58 by a pair of teeth G1, G2 mounted to the output shaft 116 and the rotary shaft 58. And a rotation allocating device (60) which sequentially performs an allocating operation with respect to the small diameter insertion hole (5) of the die (4) at the retreat position of (H).

Images