JPH10249452A - Device for mounting die in press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten replacement working time for the mounting, demounting, etc., of the die in the press machine, and to surely clamp the die. SOLUTION: In this device, by inserting the shank SK of a punch between the clamp part 37 of a first block 35 and the clamp part 43 of a second block 41 and by pushing the second block 41 by a block moving mechanism 57 against the first block 35 fixed on the rear side surface of a slider 9, the shank SK is clamped, and the punch is mounted on the rear side surface of the slider 9. In the block moving mechanism 57, by rotating a cam lever 71, a cam 73 formed in the center of the rotation is rotated, and the second block 41 is pushed against the first block 35 by a pressing member 47 through a spring member 49. In this state, the cam lever 71 is fixed by a fixing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die mounting device for a press machine, and more particularly to a die mounting device for a press machine for mounting a punch on a lower surface of a slider.

[0002]

2. Description of the Related Art FIG. 7 shows a general press machine 201. Conventionally, such a press machine 201
, A slider 207 that moves up and down by a crankshaft 205 rotated by a motor (not shown) is provided above the C-shaped frame 203. This slider 2
07 is provided with a shank holder block 209 for fixing a shank SK for mounting the punch P projecting upward from the upper surface of the punch P. The shank holder block 209 is fixed by bolts 211. A punch P is attached to the slider 207.

A die D is provided on the lower part of the C-shaped frame 203 so as to face below the punch P, and the punch P and the die D cooperate with each other by punching the plate material W by the vertical movement of the slider 207. Processing is performed.

[0004]

However, in such a conventional technique, every time the punch P is attached or detached, the operator loosens the bolt 211 of the shank holder block 209 using a wrench as a tool. It is necessary to tighten or tighten, and there is a problem that not only is it troublesome, but also that the setup time is long and the work efficiency is reduced.

An object of the present invention has been made in view of the above-mentioned conventional technology, and is intended to reduce the time required for replacement work such as mounting and removing a die in a press machine. The present invention is to provide a mold mounting device.

[0006]

According to a first aspect of the present invention, there is provided a mold mounting apparatus for a press machine, wherein a shank of a punch is inserted into a recess provided on a lower surface of a slider and fixed. A press machine for performing press working on a plate material in cooperation with a die provided opposite to the punch by moving the slider up and down, wherein the press machine is provided fixed to the lower surface of the slider and the press machine. A first block having a clamp portion for clamping a shank of a punch, cooperating with a clamp portion of the first block provided along the lower surface of the slider so as to be able to approach and separate from the first block; A second block having a clamp portion for clamping the shank of the punch, and moving the second block toward and away from the first block. And the block moving mechanism and is characterized in that it comprises an.

Accordingly, the shank of the punch is inserted between the clamp portion of the first block and the clamp portion of the second block, and the second block is moved by the block moving mechanism with respect to the first block fixed to the lower surface of the slider. By approaching and pressing, the shank of the punch is clamped and the punch is mounted on the lower surface of the slider.

According to a second aspect of the present invention, there is provided a die mounting apparatus for a press machine according to the first aspect, wherein the block moving mechanism is rotatably provided on the slider and is provided at a center of rotation. A cam lever having a cam, and a pressing member for pressing the second block against the first block via a spring member by rotation of the cam are provided.

Therefore, by rotating the cam lever, the cam formed at the center of rotation is rotated, and the second block is pressed to the first block by the pressing member via the spring member.

According to a third aspect of the present invention, there is provided a die mounting apparatus for a press machine according to the first aspect, wherein the block moving mechanism is provided on the slider and has a cam at the center of rotation. A cam lever, a pressing member that is input via a spring member by rotation of the cam, and a lever member that is input to a point of force by the pressing member and presses the second block against the first block by an action point. It is characterized by becoming.

Accordingly, by rotating the cam lever, the cam formed at the center of rotation is rotated, the force is input to the force point of the lever member by the pressing member via the spring member, and the second block is rotated by the action point. Press close to the first block.

According to a fourth aspect of the present invention, there is provided a mold mounting device for a press machine according to the second aspect, wherein the cam lever is fixed while the second block is pressed against the first block. And fixing means for performing the operation.

Accordingly, the cam lever is fixed by the fixing means in a state where the first block is pressed against the second block by rotating the cam at the center of rotation.

According to a fifth aspect of the present invention, there is provided a die mounting apparatus for a press machine according to the first to fourth aspects, wherein the first block clamping part and / or the second block clamp is provided. And a fall prevention pin provided to protrude from the portion and fitted into a groove provided in the shank.

Accordingly, the fall prevention pins projecting from the first block and / or the second block for clamping the shank of the punch fit into the groove of the shank to prevent the punch from falling.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 6 shows an entire press machine 3 to which the mold mounting apparatus 1 according to the present invention is applied. In this press machine 3, C-shaped frames 5 as side plates are erected on both left and right sides (in the direction perpendicular to the plane of FIG. 6).

A slider 9 which moves up and down along a slide guide 7 is provided on an upper portion of the C-shaped frame 5.
A crankshaft 13 is provided on the upper frame 11 above the slider 9, and one end of the crankshaft 13 is provided with a slider driving motor 1 via a gear mechanism 15.
7 are connected.

On the other hand, the bed 1 is located below the C-shaped frame 5.
A bolster 23 on which a lower sub-plate 21 having a die D is detachably mounted is provided on the bed 19.

Referring to FIGS. 1 to 5, the slider 9
A mold mounting device 1 is mounted on the lower surface of the device. FIG.
6 shows a bottom view of the slider 9 viewed from the direction I in FIG. Referring to FIG. 1, in the mold mounting apparatus 1,
A plate 29 is attached to a ceiling surface 27 of a concave portion 25 formed from the center to the front surface of the lower surface of the slider 9 with bolts 31 and bolts 33. Recess 2
5, a rear shank holder block 35 as a first block is fixed to the lower surface of the plate 29 by the bolt 33, so that the rear portion of the plate 29 is integrally formed with the rear shank holder block Is mounted on the ceiling surface 27. A substantially circular recess 37 is provided on the front surface of the central portion of the rear shank holder block 35 as a clamp for clamping the shank SK of the punch P in order to set the punch P at an appropriate position.

A pair of T-slots 39 are provided in the front half of the lower surface of the plate 29 so as to extend in the front-rear direction (left and right in FIG. 1 and left and right in FIG. 3). The front shank holder block 41 is slidably provided in the front-rear direction. The front shank holder block 41 has a central rear surface provided with a recess 3 of the rear shank holder block 35.
, A semi-circular recess 4 as a clamp portion
3 are provided. That is, the front shank holder block 41 can freely approach and separate from the rear shank holder block 35, and the recesses 37 and 43
Thereby, the shank SK of the punch P can be positioned and clamped at a predetermined position.

A space 45 is provided at the center of the front shank holder block 41. This space 45
On the rear side (right side in FIG. 1), a rear shaft 47 as a pressing member is slidably provided in the front-rear direction. The rear shaft 47 is always urged forward (to the left in FIG. 1) by a spring 49 as a spring member, but the pressing plate 51 is bolted to the front shank holder block 4.
1 prevents the rear shaft 47 from falling off. A push seat 55 is provided on the front surface of the rear shaft 47.

The front shank holder block 41 is provided with a front shaft 57 as a block moving mechanism that penetrates the front shank holder block 41 in the front-rear direction so as to be slidable in the front-rear direction. The rear end can contact the push seat 55 of the rear shaft 47 described above. The front shaft 57 is slidably supported by the front shank holder block 41 via a shaft receiver 59 attached to the front shank holder block 41 by bolts 61, and a stopper provided at the tip of the front shaft 57. 63 prevents the shaft receiver 59 from falling off.

The front part of the front shaft 57 is the shaft holder 6
5 slidably supported by the shaft holder 6
5 is provided rotatably about the front shaft 57. This shaft holder 65 is engaged with a hook 69 attached to the front surface of the slider 9 with a bolt 67.

A cam lever 71 is provided on the shaft holder 65.
Are rotatably provided, and a cam 73 is formed at the center of rotation. The cam lever 71 comes into contact with the head 75 of the front shaft 57 at the long diameter portion at the time of setting (the state shown by the solid line in FIG. 1), and at the time of release (the state shown by the two-dot chain line in FIG. 1). It contacts the part 75. Therefore, when the cam lever 71 is rotated counterclockwise in FIG. 1, the front shaft 57 is pushed backward by the cam 73.

Referring also to FIG. 2, a stopper 77 as a fixing means is provided at a position facing the cam lever 71 near the left end of the shaft holder 65 in FIG. Stop hole 79
The cam lever 71 is fixed in the set state (the state shown by the solid line in FIG. 1) by being fitted into.

Next, the operation of mounting the punch P by the above-described mold mounting apparatus 1 will be described. When setting the punch P, first, the cam lever 71 is moved to the released state (the state shown by the two-dot chain line in FIG. 1) so that the short diameter portion of the cam 73 comes into contact with the front shaft 57. As a result, the front shaft 57 can move forward, so that the spring 49 pushes the front shank holder block 41 forward, separates from the rear shank holder block 35, and enters an unclamped state.

The shank SK of the punch P is inserted between the recess 43 of the front shank holder block 41 and the recess 37 of the rear shank holder block 35, and the cam lever 71 is rotated counterclockwise in FIG. (The state shown by the solid line in FIG. 1). As a result, the long diameter portion of the cam 73 pushes the front shaft 57 backward and pushes the front shank holder block 41 backward via the spring 49, so that the shank SK of the punch P is clamped between the rear shank holder block 35 and the rear shank holder block 35. Is done. In this state, the stopper 77 is inserted into the stopper hole 79 of the cam lever 71 to prevent the cam lever 71 from moving.

On the other hand, when unclamping the punch P, the stopper 77 is pulled out from the stopper hole 79, and the cam lever 71 is rotated clockwise in FIG. As a result, the short diameter portion of the cam 73 comes into contact with the head 75 of the front shaft 57, and the front shaft 57 moves forward by the return force of the spring 49. With the movement of the front shaft 57, the front shank holder block 41 moves forward and separates from the rear shank holder block 35, so that the shank SK is unclamped.

From the above results, the punch P can be easily clamped and unclamped in a short time by rotating the cam lever 71 without using a tool, so that the work efficiency of mounting and removing the punch P is improved. .

The recess 43 of the front shank holder block 41 and the recess 37 of the rear shank holder block 35 for clamping the shank SK of the punch P are provided with the center of rotation of the cam lever 71, the shaft of the front shaft 57, and the rear shaft 47.
The shank SK of the punch P is always set at the concentric position since the shaft P is formed in a substantially semicircular shape having a center at the concentric position with the axis or the like. Therefore, the centering operation of the punch P can be easily performed.

Next, a mold mounting apparatus 81 according to another embodiment will be described with reference to FIGS. In the mold attaching device 81, the same parts as those of the mold attaching device 1 shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the overlapping description will be omitted. .

FIG. 7 shows the slider 9 viewed from the direction I in FIG.
FIG. Referring to FIG. 7, in the mold attaching device 81, a rear shank holder block 83 as a first block is bolted to a ceiling surface 27 at a rear portion of the concave portion 25 formed from the center to the front surface of the lower surface of the slider 9. 85. A substantially circular recess 87 is provided on the front surface of the central portion of the rear shank holder block 83 as a clamp for clamping the shank SK of the punch P in order to set the punch P at an appropriate position.

A front shank holder block 89 is fixed to the ceiling surface 27 at the front of the recess 25 by bolts 91. This front shank holder block 8
9 at the rear end of the rear shank holder block 8
A notch 93 is provided at the center of the end face facing 3. A slide block 95 as a second block is slidably provided in the notch 93 in the front-rear direction so as to clamp the shank SK in cooperation with the rear shank holder block 83.

In the center rear end face of the slide block 95, the recess 8 of the rear shank holder block 83 is provided.
, A substantially semicircular recess 9 as a clamp portion
7 are provided. That is, the slide block 95
The shank SK of the punch P can be positioned at a predetermined position and clamped by the recesses 87 and 97 so that the shank SK can be moved toward and away from the rear shank holder block 83.

At the center of the recess 97 of the slide block 95, a fall prevention pin 99 is provided to protrude. Further, a printing plate 101 is attached to the center of the front end face of the slide block 95. A plurality of return springs 103 are embedded in a front end face of the rear shank holder block 83 facing the slide block 95 as urging means for pushing the slide block 95 back.

On the other hand, referring also to FIG. 11, a slide surface 105 composed of three circular surfaces is formed at the front side of the notch 93 provided in the front shank holder block 89. Inside this notch 93,
It has a lever member 107 that rotates by sliding along the slide surface 105.

Therefore, the lever member 107 has a circular portion 10 provided at one end (upper end in FIG. 11).
The outer peripheral surface of the lever 9 slides along the slide surface 105 to serve as a fulcrum. Using the other end 111 (the lower end in FIG. 11) as a point of force, the central portion 113 of the lever member 107 serves as an action point. Then, by pressing the printing plate 101, the slide block 95 is moved backward to clamp the shank SK.

The front shank holder block 89 at the front (left side in FIG. 11) of the other end 111, which is the point of force of the lever member 107, is provided with a through hole 115 in the front-rear direction. A rear pin 117, a spring 119, and a front pin 121 as pressing members are provided in this through hole 115 in order from a rear portion (the right portion in FIG. 11), and all are slidable back and forth inside the through hole 115. It is provided in. The rear end surface of the rear pin 117 is always in contact with the outer peripheral surface of the other end 111, which is the point of force of the lever member 107.

A pin holder 123 is mounted on the front side of the front shank holder block 89, and the front pin 121 can pass through a part of the pin holder 123 and can move forward and backward (to the left in FIG. 7). ing. Further, a cam lever 125 is provided on the pin holder 123.
Is provided so as to be rotatable around the center of rotation. A cam 129 is provided at the center of rotation of the cam lever 125, and the cam 129 is in contact with the front end surface of the front pin 121 described above.

The cam lever 125 is set when the mold is set (FIG. 7).
In the state shown by the solid line, position "B")), the long diameter portion comes into contact with the front pin 121 and is pushed backward (to the right in FIG. 7). When the mold is released (the state shown by the two-dot chain line in FIG. 7, the position “A”), the short diameter portion is
1 is in contact with the front end face.

Referring also to FIG. 13, the pin holder 1
23 is located near the left end in FIG. 7 and opposed to the cam lever 125.
1 is provided, and is urged by a spring 135 in a direction in which it always projects. Therefore, the cam lever 125
Reaches the mold mounting position (the “B” position in FIG. 7), the stopper pin 131 is fitted into the stopper hole 133 provided in the cam lever 125 to fix the cam lever 125 so as not to be loosened.

Next, the operation of mounting the punch P by the above-described mold mounting device 81 will be described with reference to FIG. When setting the punch P, first set the cam lever 125
In the released state (the state shown by the two-dot chain line in FIG. 7, the position "A")
, So that the short-diameter portion of the cam 129 comes into contact with the front pin 121.

As a result, the front pin 121 moves forward, so that the spring 119 and the rear pin 117 also move forward, and there is no pressing force on the slide block 95, so that the slide block 95 is moved forward by the return spring 103. Accordingly, the slide block 95
Is separated from the rear shank holder block 35 and the space between the recess 97 of the slide block 95 and the recess 87 of the rear shank holder block 83 expands to be in an unclamped state.

The shank SK of the punch P is inserted between the recesses 87 and 97, and the cam lever 125 is rotated clockwise in FIG. As a result, the long diameter portion of the cam 129 pushes the front pin 121 backward to push the spring 11
9, the rear pin 117 is pushed backward.
7 pushes the end 111, which is the point of force of the lever member 107, backward.

As a result, the circular portion 109, which is the fulcrum of the lever member 107, is turned into the circular slide surface 105 of the notch 93.
, While rotating in the counterclockwise direction, the central portion 113, which is the point of action of the lever member 107, pushes the burning plate 101 of the slide block 95 backward. When the slide block 95 is pushed backward, the gap between the recess 87 and the recess 97 is narrowed, and the shank SK of the punch P is clamped between the slide block 95 and the rear shank holder block 83.

After the slide block 95 comes into contact with the shank SK, even if the cam lever 125 is further moved clockwise in FIG. 7, the slide block 95 does not move, so that the lever member 107 does not rotate and the rear pin 117 does not move. However, since the front pin 121 is further pushed backward, it moves while compressing the spring 119. At this time, the spring 119 is compressed to generate a spring force. The force is increased by using the lever of the lever member 107, and then the front pin 121 generates a clamping force on the shank SK. Here, referring also to FIG.
Clamping force P when force F is applied by rear pin 117
Is given by P = F × (A + B) / A.

Referring also to FIG. 13, the cam lever 1
When the lever 25 is moved to the position “B” in FIG. 7, the retaining pin 131 climbs up the slope of the cam lever 125 and rises in FIG. 13B against the spring 135, and the stopper hole provided in the cam lever 125. When it reaches 133, it is fitted into the stop hole 133 by the spring force of the spring 135 to lock the cam lever 125.

When an unexpected force is applied to the punch P, such as when the mold is jammed, a fall prevention pin 99 projecting from the inner surface of the recess 97 is provided on the shank SK of the punch P. The punch P is fitted to the shank groove 137 to prevent the punch P from falling.

On the other hand, when the punch P is to be unclamped, the handle 139 is pulled to pull out the retaining pin 131 from the stopper hole 133 against the spring 135, and the cam lever 125 is rotated counterclockwise in FIG. As a result, the short-diameter portion of the cam 129 comes into contact with the front end face of the front pin 121, so that the front pin 121 moves forward by the return force of the spring 119.

With the movement of the front pin 121, the spring 119 expands and loses the spring force, and the rear pin 117 can move forward. Therefore, the slide block 95 is pushed forward by the return spring 103, and the recess 87 is pressed. And dent 97
The space between them is enlarged, and the shank SK is unclamped.

From the above results, the punch P can be easily clamped and unclamped in a short time by rotating the cam lever 125 without using a tool, so that the work efficiency of mounting and removing the punch P is improved. .

The pressing force generated by the cam 129 of the cam lever 125 is determined by the front pin 121, the spring 119,
By rotating the lever member 107 through the rear pin 117, the shank SK of the punch P is clamped by applying this principle, so that a strong clamping force can be obtained, and the punch P can be securely clamped. it can.

The recess 97 of the slide block 95 and the recess 87 of the rear shank holder block 83 are provided in the printing plate 10 with which the action point of the lever member 107 abuts.
The shank SK of the punch P is always set to a concentric position because the shank SK of the punch P is formed in a substantially semicircular shape having a center at a rear position of the punch 1. Therefore, the centering operation of the punch P can be easily performed.

When the cam lever 125 is moved to the set position of the punch P, the retaining pin 131 automatically fits into the stop hole 133 of the cam lever 125, so that loosening can be reliably prevented.

Further, the fall prevention pin 99 is made of a shank SK.
Can be prevented from falling even when an unexpectedly large force acts on the punch P.

The present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes. For example, in the above-described embodiment, the case where only the punch P is attached to the lower surface of the slider 9 has been described.
When the punch P and the die D are mounted on the press machine 3,
Is attached to the lower surface of the slider 9 in the same manner as when the punch P is attached, and then the die D is attached to the bolster, and then the punch P and the die D are separated. The die D can be centered and mounted at an appropriate position.

[0058]

As described above, in the mold mounting apparatus for a press machine according to the first aspect of the present invention, the shank of the punch is inserted between the clamp portion of the first block and the clamp portion of the second block, and the slider The punch can be mounted on the lower surface of the slider by clamping the punch shank by pressing the second block closer to the first block fixed to the lower surface of the slider by the block moving mechanism. Pulling out and mounting can be easily performed.

In the mold mounting apparatus for a press machine according to the second aspect of the present invention, the cam formed at the center of rotation is rotated by rotating the cam lever, and the second block is pressed by the pressing member via the spring member. Since the punch is fixed to the lower surface of the slider by being pressed close to one block, centering and mounting of the punch can be easily performed. Further, since the clamp is performed via the spring, the clamp can be reliably performed even if the diameter of the shank changes.

In the mold mounting apparatus for a press machine according to the third aspect of the present invention, the cam formed at the center of rotation is rotated by rotating the cam lever, and the force of the lever member is applied by the pressing member via the spring member. The punch is input and rotated, and the second block is pressed close to the first block by the action point, so that the punch can be reliably clamped with a strong clamping force.

In the mold mounting apparatus for a press machine according to a fourth aspect of the present invention, the cam lever is fixed by the fixing means in a state where the first block is pressed against the second block by rotating the cam at the center of rotation. So
The clamped state of the punch shank can be reliably maintained, and work safety can be ensured.

In the mold mounting apparatus for the press machine according to the fifth aspect of the present invention, the fall prevention pin projecting from the first block and / or the second block for clamping the shank of the punch fits into the groove of the shank. Even when an unexpected force is applied, it is possible to prevent the punch from falling.

[Brief description of the drawings]

FIG. 1 is a bottom view of a mold mounting device in a press machine according to the present invention, as viewed from a direction I in FIG.

FIG. 2 is a front view as viewed from a direction II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view seen from an IV direction in FIG. 3;

FIG. 5 is a side view of a hook and the like viewed from a direction V in FIG. 2;

FIG. 6 is a side view showing a press machine to which the mold attaching device according to the present invention is applied.

FIG. 7 is a bottom view showing another embodiment of the die attaching device in the press machine according to the present invention.

FIG. 8 is a front view as viewed from a direction VIII in FIG. 7;

FIG. 9 is a sectional view taken along line IX-IX in FIG. 7;

FIG. 10 is a sectional view taken along line XX in FIG. 8;

FIG. 11 is a detailed view of a lever member.

FIG. 12 is an explanatory view showing the principle of leverage by a lever member.

FIGS. 13A and 13B are explanatory views of preventing the cam lever from coming loose.

FIG. 14 is a side view showing a conventional press machine that is more general.

[Explanation of symbols]

1, 81 Die mounting device 3 Press machine 9 Slider 35, 83 Rear shank holder block (first block) 37, 43, 87, 97 Depression (clamp portion) 41 Front shank holder block (second block) 47 Rear shaft (Pressing member) 49, 119 Spring (spring member) 71, 125 Cam lever (block moving mechanism) 73, 129 Cam 77, 133 Retainer (fixing means) 95 Slide block (second block) 107 Lever member 111 The other end (Effect point) 113 Central part (action point) 117 Rear pin (pressing member) 137 Shank groove (groove) 99 Fall prevention pin P Punch SK Shank

Claims (5)

[Claims] 1. A shank of a punch is inserted and fixed in a recess provided on a lower surface of a slider, and the slider is moved up and down to cooperate with a die provided opposite to the punch to form a plate material. A press machine for performing press working, wherein the first block is provided fixed to the lower surface of the slider and has a clamp portion for clamping a shank of the punch, and the first block along the lower surface of the slider. And a second block having a clamp portion that is provided so as to be able to approach and move away from the first block and clamps the shank of the punch in cooperation with the clamp portion of the first block. A mold moving device for a press machine, comprising: 2. A cam lever provided on said slider and having a cam at the center of rotation, said block moving mechanism; and a pressing member for pressing said second block against said first block via a spring member by rotation of said cam. The die mounting device for a press machine according to claim 1, further comprising: 3. A cam lever provided on the slider and having a cam at the center of rotation, a pressing member input by a rotation of the cam via a spring member, and an input to a point of force by the pressing member. 2. A die mounting device for a press machine according to claim 1, further comprising a lever member for pressing said second block against said first block by an action point. 4. The apparatus according to claim 2, further comprising fixing means for fixing said cam lever in a state where said second block is pressed against said first block. . 5. The clamp of the first block and / or
5. The press machine according to claim 1, further comprising a drop prevention pin that protrudes from the clamp portion of the second block and fits into a groove provided in the shank. 6. Mounting device.