JP2001269725A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch press having an easily exchangeable die, good workability and high safety. SOLUTION: In the punch press, in which a work positioning apparatus is arranged only in the X axis direction to be freely positioned and a working head 17 having a punch die pressing means 77 is arranged in the Y axis direction orthogonal to the X axis to be freely positioned, a striking piece 81 to strike a punch 67 is movably arranged in the punch pressing means in the horizontal direction, an actuator 111, which positions the striking piece to the striking position right under the punch die pressing means or a retracting position EP deviated from the striking position in the horizontal direction, is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a punch press. More specifically, the machining die for punching is Y
The present invention relates to a punch press which is provided so as to be movable and positioned in an axial direction and is provided so as to be movable and positioned in an X-axis direction.

[0002]

2. Description of the Related Art In a punch press as described above, the die holder itself is axially moved, and usually one or several upper dies (normally a punch) can be mounted.

[0003] In addition, when replacing the upper mold, the entire mold is removed from the machining head, the upper mold is replaced outside, and then the mold holder is mounted on the machining head. Since the lower mold (usually the die) is lighter than the upper mold, it is common to replace only the lower mold.

[0004]

In the above-mentioned punch press, since the die holder itself moves, it is difficult to make a large die holder on which a large number of dies can be mounted like a turret punch press. Station cannot be provided. Since the upper die is located directly below the ram, a space for pulling out the upper die (punch) cannot be provided, and the die must be replaced for each die holder.

[0005] The work of exchanging the mold for each heavy mold holder is poor in workability and has a problem in terms of safety.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a punch press in which the mold can be easily replaced and which has improved workability and safety. .

[0007]

According to a first aspect of the present invention, there is provided a punch press in which a work positioning device is provided so as to be freely positioned only in the X-axis direction of the work longitudinal direction, and a punch die pressing means. In a punch press provided with a processing head having a positioner in the Y-axis direction orthogonal to the X-axis, a striker is movably provided in the punch die pressing means in a horizontal direction, and the striker is formed by a punch die. The gist of the invention is to provide an actuator which is positioned at a striking position immediately below the pressing means or at a retracted position horizontally separated from the striking position.

According to a second aspect of the present invention, in the punch press according to the first aspect, a first hitting position and a second hitting position are provided immediately below the punch die pressing means, and the hitting element is connected to the first hitting position. The gist of the present invention is to provide an actuator for positioning at one hitting position, second hitting position, or the retracted position.

According to a third aspect of the present invention, in the punch press according to the second aspect, the actuator is positioned at the first hitting position or the second hitting position, and at the retracted position. And a second cylinder to be provided in series.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall view of a punch press according to the present invention. As shown in FIG. 1, the punch press 1 includes a base 3 extending in the left-right direction (X-axis direction).
A gate-shaped main body frame 5 is provided integrally extending over substantially the center of the main body in a direction orthogonal to the X-axis direction (Y-axis direction).

The main body frame 5 includes an upper frame 7 provided horizontally above the base, side frames 9 (a, b) for supporting both ends of the upper frame 7, and a lower portion provided in parallel with the upper frame 7. The frame 11 is integrally connected.

A processing head 17 comprising an upper mold holding mechanism 30 and a lower mold holding mechanism 120 to be described later is provided on the main body frame 5 so as to be movable and positioned in the Y-axis direction.

The base 3 is provided with a work positioning device 19 for positioning a plate-like work W at an arbitrary position in the X-axis direction. The work positioning device 19 is provided with an X-axis carriage 23 having a plurality of work clamps 21 movably on a X-axis guide rail 25 via a linear motion bearing (not shown). Further, the X-axis carriage 23 is provided with a nut member (not shown) screwed to the X-axis feed screw 27 which is driven to rotate by the X-axis servo motor Mx.

The base 3 is provided with a work table 31 on which a brush 29 is implanted.
The work W clamped to the work table 1
9 are supported by the brush 29.

Therefore, by appropriately rotating the servo motor Mx under the control of an NC unit (not shown), the work W held on the X-axis carriage 23 can be positioned at an arbitrary position on the X-axis. Can be.

Next, the upper mold holding mechanism 30 will be described. The upper mold holding mechanism 30 includes a punch assembly 67 described later.
And a punch die pressing means such as a hydraulic cylinder that presses the punch assembly 67 so as to be freely positioned in the Y-axis direction. Hereinafter, the upper mold holding mechanism 30 will be described with reference to FIGS.
This will be described in detail with reference to FIG.

On the lower surface of the upper frame 7, a pair of guide rails 33 extending parallel to the Y-axis
4 attached. And this guide rail 3
A first carriage base 37 is movably engaged with and held by a linear motion bearing 35 at 3.

Below the first carriage base 37, a punch holder case 41 for mounting the punch holder 39 is fixed by fixing means (not shown) such as bolts. A punch holder rotating means 43 is provided below the punch holder case 41.

The punch holder rotating means 43 is composed of a plurality of members. The upper guide unit 47 and the lower guide unit 49 each having a through hole 45 into which the punch holder 39 is inserted are connected to a bolt 52 via an intermediate member 51. Are integrated together. The upper guide unit 47 is fixed to the punch holder case 41 with a plurality of bolts 48.

An annular worm wheel 53 having a hole having the same diameter as the through hole 45 is rotatably provided between the upper guide unit 47 and the lower guide unit 49.

Between the upper guide unit 47 and the lower guide unit 49, bearings 57 (a, b) for rotatably supporting a rotating shaft 56 of a worm gear 55 engaged with the worm wheel 53 are provided. An internal bearing case 59 is provided.

The bearing case 59 is integrally connected to the upper guide unit 47 and the lower guide unit 49 by bolts 61. Further, the worm wheel 53 and the punch holder 39 are connected to a key 5 provided on the punch holder 39.
9 regulates the relative rotation.

The rotation shaft 56 of the worm gear 55
Is connected to a drive shaft 65 via a universal joint 63, and the other end of the drive shaft 65 is connected to another drive shaft via a universal joint to a servomotor for a punch die index (not shown). (Not shown) in spline engagement.

A punch assembly 67 is mounted on the punch holder rotating means 43 having the above-mentioned structure so as to be supported at a predetermined height by a lift spring (not shown).

On the upper surface of the first carriage base 37, a cylinder housing 71 extending upward through a rectangular cutout hole 69 provided in the upper frame 7 and extending in the Y-axis direction is integrally fixed by bolts 73. I have.

The above-mentioned cylinder housing 71 is provided with a hydraulically driven ram cylinder 77 having a vertically movable ram 75 as a punch die pressing means. A circular recess 79 concentric with the ram 75 is provided on the lower end surface of the ram 75, and the head of the striker 81 is held in the recess 79, and the head is moved horizontally and in the Y-axis direction. A striker holding means 83 is provided for holding as possible.

The hitter holding means 83 described above fixes a guide plate 87 having a guide groove for guiding the square flange 85 of the hitter head to the circular recess 79 with a bolt (not shown). A holding plate 89 holding both sides of the square head 85 of the striker head is fixed with bolts 90, and the square flange 85 of the striker head is horizontally and
It is provided so that it can be held movably in the Y-axis direction.

When the ram 75 is located at the top dead center, the striker 81 is located at a strike position immediately below the ram 75, and presses the punch head 91 when the ram 75 is located at the bottom dead center. It is provided so that punching can be performed in cooperation with a die 185 described later.

The first carriage base 37 is provided with a slider 95 having a sliding hole 93 with which the lower part of the hitting element 81 is vertically movably engaged. The slider 95 is provided horizontally and reciprocally in the Y-axis direction by a slider guide 97 attached to the first carriage base 37.

Behind the slider guide 97 (to the right in FIG. 3), a cylinder carriage 101 to which a first cylinder 99 is mounted horizontally is provided in the same manner as the slider 95.
The slider guide 97 is horizontally reciprocally movable in the Y-axis direction.

The piston rod 103 of the first cylinder 99 is connected to a connecting member 105 provided at the rear end of the slider 95 by a connecting bolt 107. Further, similarly to the first cylinder 99, the first carriage base 37 is also provided at the rear end of the cylinder carriage 101.
The piston rod 113 of the second cylinder 111 attached to the first cylinder 99 via a cylinder bracket 109 is connected to a connecting member 115 provided on the first cylinder 99 by a connecting bolt 117.

As shown in FIG. 2, a nut member 119 is integrally fixed to the right side surface (the right side in FIG. 2) of the first carriage base 37 by bolts 121. The nut member 119 is screwed with a first Y-axis feed screw 123 that is driven to rotate by a first Y-axis servo motor My1 provided on the main body frame 5.

In the above configuration, the punch holder 39 can be rotated to a desired angle via the worm gear 55 by appropriately rotating the servomotor (not shown) for the punch die index.
Therefore, the punch assembly 67 mounted on the punch holder 39 with the relative rotation restricted by a punch key (not shown) can be indexed at a desired angle.

The punch assembly 67 is controlled by controlling the first Y-axis servo motor My1 and rotating it appropriately.
Can be moved and positioned at any position on the Y-axis.

The first cylinder 99 and the second cylinder 1
11, a retracting position E in which the striker 81 is separated from the strike position immediately below the ram 75 or horizontally below the ram 75.
P can be moved.

As shown in FIG. 3, for example, by moving the piston rod 103 of the first cylinder 99 forward and backward with the piston rod 113 of the second cylinder 111 in the forward position, the striker 81 is moved to the punch assembly 67. , And a second hitting position separated by a distance R from a position directly above the punch assembly 67.

Further, by setting the piston rod 103 of the first cylinder 99 to the retracted position and setting the piston rod 113 of the second cylinder 111 to the retracted position, the striker 81 can be moved to the retreat position EP.

As shown in FIG. 6, when using a die having a plurality of punches arranged on a circumference having a radius R from the axis, a piston rod 113 of the second cylinder 111 is used. Hold it in the forward position and
When the piston rod 103 is moved to the forward position, the striker 81 is moved to the second strike position immediately above the punch of the mold circumferential arrangement type.
Can be moved.

It is to be noted that, even when using a die of the die circumferential arrangement type, the striker 81 can be moved to the retreat position EP using the first cylinder 99 and the second cylinder 111.

The rear of the punch holder case 41 (FIG. 3)
An opening 125 through which the cylinder carriage 101 can pass when the striker 81 moves is provided at the right side of FIG. When the striker 81 is in the retracted position EP, the first carriage base 37 has a rectangular flange 85 of the striker 81.
A groove (not shown) for holding the striker 81 by engaging with the groove is provided.

Next, the lower mold holding mechanism 120 will be described. The lower mold holding mechanism 120 is an upper mold holding mechanism 3.
Similarly to 0, a die 185 described later is held so as to be indexable, and is provided so as to be freely positioned in the Y-axis direction. Hereinafter, this will be described in more detail with reference to FIG.

A pair of guide rails 129 extending parallel to the Y-axis direction are attached to the lower frame 11 by bolts (not shown). A second carriage base 133 is movably engaged with the guide rail 129 via a linear motion bearing 131.

An annular cylinder assembly 137 having a hollow cylindrical shape is mounted in a cylinder mounting hole 135 provided substantially at the center of the second carriage base 133 supported at both ends by a pair of guide rails 129.

In this annular cylinder assembly 137, an annular piston 143 is slidably provided in a pressure fluid chamber of an annular cylinder formed by an inner cylinder 139 and an outer cylinder 141 which will be described later.
This annular piston 143 has a function as a piston rod. The annular cylinder assembly 13 is described below.
7 will be described in more detail.

A cylinder base 145 is fixed on the second carriage base 133 by a plurality of bolts 147. An inner cylinder 139 extending downward from an upper flange 145F of the cylinder base 145 is provided at the center of the cylinder base 145. Outside the inner cylinder 139, an outer cylinder 141 fixed to the cylinder base 145 with a plurality of bolts 149 is coaxially provided.

An annular pressure fluid chamber is formed by the inner cylinder 139 and the outer cylinder 141, and an annular piston 143 is slidably fitted in the pressure fluid chamber, and an annular piston protrudes outside from the pressure fluid chamber. The lower end of the piston 143 is provided so as to function as a piston rod.

A hollow cylindrical rotation transmitting member 151 is rotatably fitted in a hollow hole at the axis of the inner cylinder 139. A large-diameter flange portion 151F is provided on the upper portion of the rotation transmitting member 151.
Is rotatably held by a flange support 153 provided on the upper portion of the cylinder base 145. At the lower end of the rotation transmitting member 151, an annular locking member 155 that engages with the lower end of the inner cylinder 139 is provided to regulate the vertical movement relative to the inner cylinder 139.

A hollow cylinder 157 is axially slidably fitted in the hollow hole in the shaft center of the rotation transmitting member 151 described above. Further, the hollow cylinder 157 is provided with a key 159 that engages with the key groove 161 of the rotation transmitting member 151 so as to allow movement in the axial direction and restrict relative rotation.

The lower end of the hollow cylinder 157 is fixed to the annular piston 143 by fixing means 163.

The fixing means includes a ring member 165 for fixing and supporting the lower end of the hollow cylinder 157,
5, a ring-shaped fixing claw 167 for holding the fixing claw 5
7 to the annular piston 143
69.

A worm wheel 1 is provided at an outer diameter portion below the flange portion 151F provided on the rotation transmitting member 151.
71 is attached by a bolt 170. The worm wheel 171 is engaged with a worm gear 177 that is supported by a bearing case 175 provided on the cylinder base 145.

The worm wheel 171 is housed in a recess 173 provided in the cylinder base 145.
The rotation drive mechanism of the worm gear 177 has the same configuration as the rotation drive mechanism of the punch holder rotation means 43.

Flange 1 of rotation transmission member 151 described above
In 51F, the die holder 1 coaxial with the rotation transmitting member 151 is provided.
79 are provided. A flange 181 is provided at a lower portion of the die holder 179, and the flange 181 is rotatably and vertically immovably engaged with a T groove provided in a flange portion 151F of the rotation transmitting member 151.

A die spacer 183 is fitted to the die holder 179 described above. This die spacer 18
The lower end of 3 is supported in contact with the upper part of the hollow cylinder 157. Then, the die 185 is placed on the die spacer 183.
Is installed. The upper and lower mold holding mechanisms (30, 1
20) is provided coaxially.

The above-described die holder 179 and hollow cylinder 157
And are connected so as to be disengageable by connecting means 187.
Further, the die key 189 provided on the die holder 179 is engaged with the key groove of the die 185 so that the die holder 1
The relative rotation between 79 and die 185 is regulated.

The connecting means 187 is connected to the die holder 1.
Assuming that the axis center CL of 79 is the origin, the reference key groove position P1 (c, 0 °) of the die 185 and the P2 (c, 90 °) position (not shown) rotated by 90 degrees from the bottom are respectively located on the bottom side. In addition, a pin hole 190 parallel to the axis is provided, and a shot pin 191 that can be disengaged from the pin hole 190 is provided in the hollow cylinder 157. In addition, P1,
P2 is a polar coordinate (r, θ) display. The size of c is set such that the pin hole 190 is located substantially at the center of the flange 181.

Below the hollow cylinder 157, a bridge member 193 having both ends fixed to the second carriage base 133 with fastening members such as bolts (not shown) is provided.
An opening 195 is provided at the center of the bridge member 193 to allow the chip to pass downward.

A spacer block 199 having an opening 197 at the axis CL is inserted between the bridge member 193 and the ring member 165. The spacer block 199 is provided so as to be freely inserted and removed in a direction perpendicular to the plane of the drawing by an actuator (not shown) such as a pneumatic cylinder.

The second carriage base 133 has a nut member 2 screwed to the second Y-axis feed screw 201.
03 is integrally fixed by bolts 205. The second Y-axis feed screw 201 is provided so as to be driven by a second Y-axis servo motor My2 that rotates in synchronization with the first Y-axis servo motor My1.

In the above configuration, in order to rotate the die 185 to a desired angle, if the worm gear 177 is appropriately rotated while the spacer block 199 is removed from under the ring member 165, the rotation transmitting member 15 can be rotated.
The rotation of 1 is transmitted to the hollow cylinder 157 via the key 159, and the rotation of the hollow cylinder 157 is transmitted to the die 185 via the shot pin 191 of the connecting means 187, the die holder 179, and the die key 189, and the die 185 is desired. Can rotate to an angle.

Further, the die 185 is moved to an arbitrary position in the Y direction by rotating the second Y-axis feed screw 201 in synchronization with the above-mentioned first Y-axis feed screw, thereby causing the punch assembly 6 to move.
7 and can be positioned simultaneously.

By operating the annular cylinder assembly 137 to lower the hollow cylinder 157, the die 185 can be lowered below the pass line PL if necessary.

During the punching process, the spacer block 199 is connected to the ring member 165 and the bridge member 1.
The lower frame 11 can receive the load applied to the die 185 via the second carriage base 133 by being inserted between the dies 93.

When performing punching, the work W is moved by the work positioning device 19, the working head 17 including the punch assembly 67 (punch) and the die 185.
The processing head 17 is positioned at a desired position of
And the punch assembly 67 (punch) with the striker 81
By pressing the punch head 91, a punching process can be performed at a desired position of the work W.

Next, a method of replacing the punch assembly 67 will be described. When the striker 81 is located above the punch head 91 of the punch assembly 67, the piston rod 113 of the second cylinder 111 is retracted to move the striker 81 to the retreat position EP.
Move to

When the striker 81 has moved to the retracted position EP, there is a space between the punch head 91 and the ram 75 required for pulling the punch assembly 67 (punch) upward from the punch holder 39. Then, the operator extracts the punch assembly 67 (punch) by hand and mounts the punch assembly 67 (punch) to be used in the next step.

Of course, replacement with the die 185 corresponding to the replaced punch assembly 67 (punch) is also performed.

In addition, the above-described mold exchange is performed in the manner shown in FIGS.
Can be performed using the mold changing apparatus 300 shown in FIG. Hereinafter, the mold changing apparatus 300 will be described.

As shown in FIG. 3 and FIG.
A guide rail support 303 is erected vertically on the upper surface of the guide rail, and a pair of guide rails 30 is mounted on the guide rail support 303.
5 is provided vertically, and the elevating member 3 is
07 is engaged so as to be able to move up and down freely. The lifting member 307 includes
A pair of mold holding arms 309 capable of holding the upper flange portion 67F of the punch assembly 67 is attached by bolts 308.

The elevating member 307 is formed on a pneumatic cylinder 313 that can move up and down with respect to a fixed piston 311 integrally provided on the base.

In the above configuration, by supplying a pressure fluid to the pressure fluid chamber 315 above the fixed piston 311, the lifting member 307 holding the flange 67 F at the top of the punch assembly 67 rises, and the punch The assembly 67 can be removed.

The mold changing device 300 may be provided on the side frame 9a on the Y-axis stroke end side.

[0074]

According to the first to third aspects of the present invention, a work positioning device is provided so as to be freely positionable only in the X-axis direction in the longitudinal direction of the work, and the machining head provided with a punch die pressing means is provided with the X-axis. In a punch press provided so as to be freely positioned in the Y-axis direction perpendicular to the axis, the striker can be moved from a strike position immediately below the ram to a retracted position horizontally separated from the strike position, so that only the punch assembly 67 (punch) is used. It can be easily replaced, improving workability and safety.

[Brief description of the drawings]

FIG. 1 is an overall view of a punch press according to the present invention, with a main part partially cut away.

FIG. 2 is a cross-sectional view of the upper mold holding mechanism taken along the line II-II in FIG.

FIG. 3 is a sectional view as viewed from the arrow III in FIG. 2;

FIG. 4 is a partial cross-sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a cross-sectional view of the lower mold holding mechanism taken along the line II-II in FIG. 1;

FIG. 6 is an explanatory diagram of a mold of a mold circumferential arrangement type in which a plurality of punches are arranged on a circumference of a radius R.

FIG. 7 is a plan view of the mold exchanging apparatus taken along the line VII-VII in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch press 3 Base 5 Main body frame 7 Upper frame 9 (a, b) Side frame 11 Lower frame 17 Processing head 19 Work positioning device 21 Work clamp 23 X-axis carriage 25 X-axis guide rail 27 X-axis feed screw 29 Brush 30 Upper part Mold holding mechanism 31 Work table 33 Guide rail 35 Linear motion bearing 37 First carriage base 39 Punch holder 41 Punch holder case 43 Punch holder rotating means 45 Through hole 47 Upper guide unit 49 Lower guide unit 51 Intermediate member 52 Bolt 53 Worm wheel 55 Worm gear 56 Rotating shaft 57 (a, b) Bearing 59 Bearing case 59 Key 61 Bolt 63 Universal joint 65 Drive shaft 67 Punch assembly (punch) 67F Lung part 69 Notch hole 71 Cylinder housing 73 Bolt 75 Ram 77 Ram cylinder 79 Recessed part 81 Striking element 83 Striking element holding means 85 Square flange 87 Guide plate 89 Holding plate 90 Bolt 91 Punch head 93 Sliding hole 95 Slider 97 Slider guide 99 First cylinder 101 Cylinder carriage 103 Piston rod 105 Connecting member 107 Connecting bolt 109 Cylinder bracket 111 Second cylinder 113 Piston rod 115 Connecting member 117 Connecting bolt 119 Nut member 120 Lower mold holding mechanism 121 Bolt 123 First Y-axis feed screw 125 Opening 129 Guide rail 131 Linear motion bearing 133 Second carriage base 135 Cylinder mounting hole 137 Annular cylinder assembly 139 Inner cylinder 14 Outer cylinder 143 Annular piston 145 Cylinder base 145F Upper flange 147 Bolt 149 Bolt 151 Rotation transmitting member 151F Flange 153 Flange support 155 Locking member 157 Hollow cylinder 159 Key 161 Key groove 163 Fixing means 165 Ring member 167 Fixing claw 169 Bolt Bolt 171 Worm wheel 173 Concave part 175 Bearing case 177 Worm gear 179 Die holder 181 Flange 183 Die spacer 185 Die 187 Connection means 189 Die key 190 Pin hole 191 Shot pin 193 Bridge member 195 Opening 197 Opening 199 Spacer block Nut Feeder 205 Bolt 300 Mold changing device 301 Base 303 Guide rail support 305 Idoreru 307 lifting member 308 volts 309 die retention arm 311 fixed piston 313 a pneumatic cylinder 315 the pressure fluid chambers CL axis W workpiece PL pass line

Claims (3)

[Claims] 1. A work positioning device is provided so as to be capable of positioning only in the X-axis direction of a work longitudinal direction, and a processing head provided with a punch die pressing means is provided with a Y-axis perpendicular to the X-axis.
In a punch press that can be positioned freely in the axial direction,
An actuator is provided on the punch die pressing means so as to be movable in the horizontal direction, and an actuator is provided for positioning the hitter at a hitting position immediately below the punch die pressing means or a retracted position horizontally separated from the hitting position. Punch press. 2. The punch press according to claim 1, wherein a first striking position and a second striking position are provided immediately below said punch die pressing means, and said striking element is moved between said first striking position and said second striking position. A punch press provided with an actuator for positioning at the retracted position. 3. The punch press according to claim 2, wherein the actuator serially connects a first cylinder positioned at the first hitting position or the second hitting position and a second cylinder positioned at the retraction position. A punch press characterized by being provided.