JPH10314996A - Transfer press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformize an eccentric load at the time of press working by arranging the left and right connecting rods of a slide driving device, asymmetrically against the center position between the left and right columns, with a shift to the upstream side in the work transporting direction. SOLUTION: The center position of the right and the left connecting rod is shifted to the upstream side U in the work transporting direction from the center position X between the left and right columns. Four point units 8A, 8A', 8B, 8B' are provided. The point units 8B, 8A (8B', 8A') are provided with a shift to the upstream side U in the work transporting direction, asymmetrically against the center position X between the left and right columns 3B, 3A (3B', 3A"). Assuming L3 is a distance from the center position X between the left and right columns to the right-end face of a slide frame 5A, and L3' is a distance from the center position X between the left and right columns to the left-end face of a slide frame 5A, the condition is L3>L3'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device having a slide drive device, a slide, a point unit, and a bolster disposed so as to make uneven the distribution of the pressing force during press working, in other words, to make the eccentric load uniform. It is about the press.

[0002]

2. Description of the Related Art Normally, a nominal pressure (pressure capacity) of a press machine is symmetrically distributed within a certain range from a center position of the press machine in the left-right direction. It is arranged symmetrically with respect to the position, and the cross-sectional area of the column and the tie rod has the same structure on the left and right. However, in the transfer press, the distribution of the pressing force at the time of press working is not uniform, and a large pressing force is required in the process on the upstream side in the work transfer direction. In addition to the above-described structure, the point unit and the tie rod having different capacities are different. Are arranged symmetrically with respect to the center position of the transfer press in the left-right direction, and the cross-sectional areas of the columns and tie rods are different from each other.

[0003]

As described above, when an eccentric load is applied during press working, the pressure capacity of the press machine decreases, and the moment acting to tilt the slide increases as the number of point units increases. Occur. As described above, the eccentric load at the time of press working deviates the parallelism between the slide and the bolster and adversely affects the mold. Therefore, it is desirable to use the eccentric load as little as possible compared to the allowable value.

Conventionally, in order to cope with such an eccentric load during press working, a large press machine capable of withstanding the eccentric load has been used, or an eccentric load has been made as uniform as possible by appropriately incorporating an idle process or the like. Was. Also, measures such as using a special press machine structure adapted to the eccentric load at the time of press working have been considered. However, there are many problems such as difficulty in setting the processing steps, shortening of the setting work, and increase in equipment cost due to enlargement and specialization of the press machine.

It is an object of the present invention to solve the above-mentioned problems and to provide a slide drive device and a transfer press having a slide, a point unit, and a bolster arranged so as to equalize the eccentric load during press working. is there.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is divided into a crown, a column, and a bed, and is provided with a tie rod and a nut for preloading and tightening to form a frame and adjust a die height. A transfer press that moves up and down a slide via a connecting rod connected to a slide drive device installed in the crown by providing two or four point units having a device and an overload safety device. The slide drive device has a pair of speed reduction mechanisms, and shifts the left connecting rod and the right connecting rod asymmetrically with respect to the center position between the left and right columns in the left-right direction to the upstream side in the work transfer direction. And arrange them.

The slide is provided with a guide for guiding the vertical movement of the slide in the up and down directions of the four corners and a slide frame for providing a mounting unit for the point unit, and a slide plate fixed to a lower portion of the slide frame for mounting the upper die. The slide frame portion is disposed asymmetrically with respect to the center position between the left and right columns and shifted from the center position in the left and right direction on the upstream side in the work transfer direction.
In the slide frame, point units of the same or different abilities are arranged asymmetrically with respect to the center position between the left and right columns, shifted to the upstream side in the work transfer direction, and the slide plate is Symmetrically with respect to the center position of the slide frame.

[0008] The bolster is composed of a transport driving device for carrying in and out of the transfer press at the time of mold replacement, and a bolster plate portion which is fixed to the transport driving device and to which a lower die is attached. Symmetrically with respect to the center position of the transfer drive device. The left and right tie rods and nuts are disposed symmetrically with respect to the center position between the left and right columns.

Further, in the transfer pressless having the above-mentioned four point units and having a slide which moves up and down, the distance between the point units before and after on the upstream side in the work transfer direction, and the distance between the front and back on the downstream side in the work transfer direction. The point units are arranged symmetrically or asymmetrically with respect to the center position of the slide in the front-rear direction while changing the distance between the point units.

Further, in the above-described transfer press having two or four point units and having a slide that moves up and down, a left column and a right column having different cross-sectional areas are sandwiched between a crown and a bed. A pre-load is given and tightened by a left tie rod, a right tie rod and a nut having different cross-sectional areas to form a transfer press frame.

[0011]

1 and 2 show a first embodiment of the present invention. As shown in FIGS. 1 and 2, the transfer press 1 includes a crown 2 and a bed 4 sandwiching left and right columns 3B, 3A, 3B ', and 3A' having the same outer frame dimensions and different cross-sectional areas. Different left and right tie rods 6B, 6A
(6B ', 6A') and nuts 7B, 7A to give a preload and tighten to integrate the frame 1A. At the same time, four point units 8 having the same capacity and having a die height adjustment device and an overload safety device (not shown)
A, 8B, 8A ', and 8B' are provided on the slide 5, and the right and left columns 3 are connected via right and left connecting rods 9B and 9A connected to a slide drive device 10 provided inside the crown 2.
Guides 11A, 11 provided on B, 3A, 3B ', 3A'
B, 11A ', 11B' and guides 12A, 12B, 12A ', 12B' provided on the slide 5 move the slide 5 up and down. The left and right tie rods 6B, 6
A, 6B ', 6A' are the center positions X between the left and right columns 3B, 3A (3B ', 3A') in the left-right direction and the front-back direction.
And symmetrically with respect to the center position Y between the front and rear columns 3B, 3B '(3A, 3A').

As shown in FIG. 1, the crown 2 has a left main gear 13B having an eccentric 14B rotatably fitted with the left connecting rod 9B, a left pinion 15B meshed with the left main gear 13B, and a left pinion 15B coaxially. A right main gear 13A having an eccentric drive 14A rotatably fitted with a left intermediate gear 16B fixedly mounted thereon and a right connecting rod 9A, a right pinion 15A meshing with the right main gear 13A, and a right pinion 15A are coaxially fixed. In addition, a right intermediate gear 16A that meshes with the left intermediate gear 16B and the driving gear 17 is provided internally.

The exhaust 14 of the left main gear 13B
B, a left connecting rod 9B rotatably fitted to B,
The right connecting rod 9A rotatably fitted to the eccentric 14A of the right main gear 13A is attached to the left and right columns 3
B, 3A (3B ', 3A'), the center position in the left-right direction is shifted asymmetrically on the upstream side U (the right side in the present embodiment) in the work transfer direction, asymmetrically with respect to the center position X between them.

As shown in FIG. 2, the slide 5 comprises a slide frame portion 5A and a slide plate portion 5B fixed to a lower portion of the slide frame portion 5A to mount an upper die (not shown). In the frame part 5A,
The slide plate portion 5B has left and right columns 3B, 3A (3
B ', 3A'), is fixed symmetrically with respect to the center position X between the left and right columns 3B.
B, 3A (3B ', 3A'), the center position in the left and right direction is shifted asymmetrically on the upstream side U in the work conveyance direction with respect to the center position X between them.

The slide frame 5A has guides 12 for guiding the vertical movement of the slide 5 in four vertical directions at four corners.
A, 12B, 12A ', 12B' and point unit 8
B, 8A, 8B ', 8A' are provided, and point units 8B, 8A (8B ', 8
A ') is disposed asymmetrically with respect to the center position X between the left and right columns 3B, 3A (3B', 3A ') and shifted to the upstream side U in the work transport direction. The slide frame 5
A and slide plate portion 5B, and upstream and downstream point units 8A, 8A ', 8B, 8B' of U and downstream D,
Front and rear columns 3A, 3A '(3B, 3B') in the front and rear direction
They are arranged symmetrically with respect to the center position Y between them.

As is apparent from the above description, in FIG. 2, L1: distance between the center position X between the left and right columns and the inner surface of the right column L1 ': distance between the center position X between the left and right columns and the inner surface of the left column Then, L1 = L1 'L2: distance between the center X between the left and right columns and the center of the right tie rod L2': distance between the center position X between the left and right columns and the center of the left tie rod, L2 = L2 'L3: left and right columns L3 ': The distance between the center position X between the left and right columns and the left end surface of the slide frame portion, L3>L3' L4: The center position X between the left and right columns. L4 ': distance between the center position X between the left and right columns and the left end surface of the slide plate portion, L4 = L4' L5: center position X between the left and right columns and the upstream side L5 ': distance between the center position X between the left and right columns and the downstream point unit, L5>L5' L6: distance between the center position Y between the front and rear columns and the inner surface of the front column L6 ': front and rear Assuming that the distance between the center position Y between the columns and the inner surface of the rear column is L6 = L6 'L7: The distance between the center position Y between the front and rear columns and the center of the front tie rod L7': The center position Y between the front and rear columns and the center of the rear tie rod L7 = L7 'L8: distance between center position Y between front and rear columns and front end face of slide frame portion L8': distance between center position Y between front and rear columns and rear end face of slide frame portion L8 = L8 'L9: Distance between center position Y between front and rear columns and front end surface of slide plate portion L9': Distance between center position Y between front and rear columns and rear end surface of slide plate portion Then, L9 = L9 'L10: Distance between the center position Y between the front and rear columns and the upstream front point unit L10': Distance between the center position Y between the front and rear columns and the upstream rear point unit L11: Center between the front and rear columns Distance L between position Y and downstream front point unit L11 ': If distance between center position Y between front and rear columns and downstream rear point unit is L10 = L10', L11 = L11 ', they are respectively disposed. Have been.

As shown in FIG. 1, the bolster 18 has a transfer driving device 18A for carrying in and out of the transfer press 1 at the time of mold replacement, and a lower die (not shown) fixed to the transfer driving device 18A. And a bolster plate 18B, and the bolster plate 18B
B, 3A (3B ', 3A') and the center position Y between the front and rear columns 3A, 3A '(3B, 3B') are symmetrically fixed to the transport driving device 18A. That is,
As shown in FIG. 2, the bolster plate portion 18B has: L12: distance between the center position X between the left and right columns and the right end surface of the bolster plate portion L12 ': distance between the center position X between the left and right columns and the left end surface of the bolster plate portion L13: distance between the center position Y between the front and rear columns and the front end surface of the bolster plate portion L13 ': distance between the center position Y between the front and rear columns and the rear end surface of the bolster plate portion, L12 = L12' and L13 = L13 ' In relation to this, it is fixed to the transport driving device 18A.

As shown in FIG. 1, P: press capability P1: upstream pressurization capability in the work transfer direction P2: similarly downstream pressurization capability P3: similarly, load on the upstream point unit P4: similarly downstream load Point unit load P5: Similarly, right tie rod and right column load P6: Similarly, right tie rod and left column load: Distance between upstream and downstream point units 1: Distance between upstream point unit and pressurized position of P1 2: Distance from the center position X between the left and right columns to the pressing position of P1 3: Distance from the center position X between the left and right columns to the pressing position of P2 4: Between the downstream point unit and the pressing position of P2 Distance 5: Distance between the upstream point unit and the center of the right tie rod 6: Distance between the downstream point unit and the center of the left tie rod P = P1 + P2, P1> P2, 2 = 3, 1>
Assuming that 4, 5 <6, the load P of the upstream and downstream point units
3, P4 is P1 · 1 + P2 (1 + 2 + 3) −P4 · = 0 P4 = {P1 · 1 + P2 (1 + 2 + 3)} / P3 = P−P4 = P− {P1 · 1 + P2 (1 + 2)
+ 3) It is obtained by｝ /. The left and right tie rods and left and right column loads P5 and P6 are P3 · 5 + P4 (1 + 5) −P6 (5 ++
6) = 0 P6 = {P3 · 5 + P4 (1 + 5)} / (5+
+6) P5 = P−P6 = P− ｛P3 · 5 + P4 (1+
5) It is determined by｝ / (5 ++ 6). In addition,
In a conventional transfer press, P = P1 + P2, P1 = P2, 2 = 3, 1 =
4, 5 = 6.

Therefore, setting of the load distribution in the manufacture of the transfer press 1 and setting a hydraulic jack between the bolster plate 18B and the slide plate 5B to set the overload safety device, elongate the frame, and adjust the upper and lower The capacity of the hydraulic jack when measuring the total clearance and the set position of the hydraulic jack on the bolster plate 18B are set using the above equation. As a result, in conventional transfer presses with eccentric load capacity specifications in which the left and right slide point units have different capacities, especially in transfer presses with large differences in the capabilities of the left and right point units, it is possible to use hydraulic jacks with the same capacity. The effect is obtained that only one hydraulic pump for supplying hydraulic oil to the hydraulic jacks provided for each hydraulic jack is required.

The left and right columns 3B, 3A, 3B ', 3A' sandwiched between the crown 2 and the bed 4 have tie rod chambers 19B, 19A for penetrating the crown 2 and the bed 4 tie rods 6B, 6A, 6B ', 6A'. , 19B ', 19A'
And wiring and piping chambers 20B, 20A, 20B ', and 20A' for passing wiring and piping to the crown 2, the bed 4, and the like.

In this embodiment, the left columns 3B, 3B
The tie rod chambers 19B, 19A, 19B ', and 19' have the same outer frame dimensions as B 'and right columns 3A and 3A'.
A ′ and wiring / pipe chambers 20B, 20A, 20B ′, 20
A 'and the left column 3B, 3B'
And the columns 3B, 3B ', 3A, 3A' having the required frame rigidity by changing the cross-sectional area of the right columns 3A, 3A '.
Is composed. The left and right columns 3B, 3B ', 3
A, 3A 'tie rod chambers 19B, 19A, 19B',
Left and right tie rods 6B, 6A, 6 penetrating 19A '
B ', 6A' and nuts 7B, 7A which are screwed with the threaded portions of the left and right tie rods 6B, 6A, 6B ', 6A' on the upper surface of the crown 2 and the lower surface of the bed 4 are also provided on the left column so as to meet the required fastening force. The cross-sectional area is changed between the 3B, 3B 'side and the right column 3A, 3A' side, and the left and right columns 3B, 3B ', 3A,
The crown 2 and the bed 4 sandwiching 3A 'are tightened by giving a preload.

FIG. 3 shows a point unit 8 on the upstream side U on the downstream side D in the work transport direction in the first embodiment.
A, a point unit 8B having a smaller capacity than 8A ',
A second embodiment of the present invention in which 8B 'is disposed on the slide 5 is shown.

FIG. 4 shows that in the first embodiment, a point unit 8 having a lower capacity than the point units 8A and 8A 'on the upstream side U is provided on the downstream side D in the work transfer direction.
B, 8B ', the point units 8 before and after the upstream U
A third embodiment of the present invention in which the distance between A and 8A 'and the distance between the front and rear point units 8B and 8B' on the downstream side D are changed to be arranged symmetrically with respect to the center position Y between the front and rear columns. Show. That is, in FIG. 4, L10: distance between the center position Y between the front and rear columns and the upstream front point unit L10 ': center position Y between the front and rear columns and the rear side upstream in FIG. L11: Distance between the center position Y between the front and rear columns and the downstream front point unit L11 ': Distance between the center position Y between the front and rear columns and the downstream rear point unit L10 <L11, L10 '<L11', respectively.

In this embodiment, the right side is the upstream side U in the work transfer direction. However, the right side may be the left side, and the number of the point units 8A, 8B, 8A ', 8B' is not limited to four. Further, in the third embodiment, the point units 8B, 8 on the downstream side D having a smaller capacity than the point units 8A, 8A 'on the upstream side U in the work transfer direction.
B 'is arranged symmetrically with respect to the center position Y between the front and rear columns 3A, 3A' (3B, 3B '), but the point units 8A, 8B, 8A', 8 having the same or different abilities.
B ′ is added to either the upstream side U or the downstream side D,
It goes without saying that they may be arranged symmetrically or asymmetrically with respect to the center position Y between the front and rear columns 3A, 3A '(3B, 3B'). Furthermore, the transfer press 1 is used as the press machine of the present invention and its embodiment, but the present invention can be applied to other press machines that perform press working in multiple steps.

[0025]

As is apparent from the above description, according to the present invention, it is possible to equalize the eccentric load at the time of press working, to suppress a decrease in the pressure capacity of the press machine, and to appropriately incorporate an idle process and the like. Therefore, the setting of the machining process is facilitated, and the setting operation can be shortened. In addition, it is possible to improve the product accuracy without securing the parallelism between the slide and the bolster, without increasing the equipment cost due to the size and specialization of the press machine, without affecting the mold. . Further, by using the same point unit, the components can be shared, the slide weight can be reduced, and the required suspension capacity of the slide weight including the upper die weight can be reduced, so that the counter balancer can be reduced.

[Brief description of the drawings]

FIG. 1 is a front configuration diagram of a press machine according to a first embodiment of the present invention.

FIG. 2 is a top sectional view of a main part according to the first embodiment of the present invention.

FIG. 3 is a top sectional view of a main part according to a second embodiment of the present invention.

FIG. 4 is a top sectional view of a main part according to a third embodiment of the present invention.

[Explanation of symbols]

1 is a transfer press, 1A is a frame, 2 is a crown, 3A, 3A 'is a right column, 3B, 3B' is a left column, 4 is a bed, 5 is a slide, 5A is a slide frame, 5B is a slide plate, 6A , 6A 'are right tie rods, 6B, 6B' are left tie rods, 7A, 7B,
Is a nut, 8A, 8A ', 8B, 8B' is a point unit, 9A is a right connecting rod, 9B is a left connecting rod, 10 is a slide drive device, 11A, 11
B, 11A ', 11B', 12A, 12B, 12A ',
12B 'is a guide, 13A is a right main gear, 13B is a left main gear, 14A and 14B are eccentric, 15A
Is a right pinion, 15B is a left pinion, 16A is a right intermediate gear, 16B is a left intermediate gear, 17 is a driving gear, 18 is a bolster, 18A is a transport driving device, 18B is a bolster plate portion, 19A, 19B, 19A ', and 19B. ′ Is a tie rod chamber, 20A, 20B, 20A ′, and 20B ′ are wiring and piping chambers, U is the upstream side in the work transfer direction, D is the downstream side in the work transfer direction, X is the center position between the left and right columns, and Y is the front The center position between the columns.

Claims (3)

[Claims] Claims 1. A crown, a column, and a bed are divided, preloaded with a tie rod and a nut, and tightened.
A frame is constructed, and two or four point units having a die height adjusting device and an overload safety device are provided, and a slide is moved up and down via a connecting rod connected to a slide driving device provided inside the crown. In the transfer press, a) The slide drive device provided inside the crown has a pair of speed reduction mechanisms, and moves the left connecting rod and the right connecting rod asymmetrically with respect to the center position between the left and right columns in the work transfer direction. The center position in the left-right direction is shifted to the upstream side. B) The slide is provided with a guide that guides the vertical movement of the slide in the up and down directions of the four corners and a slide frame part that has a point unit mounting part, and a slide plate part that is fixed to the lower part of the slide frame part and attaches the upper die. And C) The slide frame portion is disposed asymmetrically with respect to the center position between the left and right columns and shifted from the center position in the left and right direction on the upstream side in the work transfer direction. D) In the slide frame portion, point units having the same or different abilities are arranged asymmetrically with respect to the center position between the left and right columns and shifted to the upstream side in the work transfer direction. E) The slide plate is fixed to the slide frame symmetrically with respect to the center position between the left and right columns. F) The bolster is composed of a transport drive unit that carries in and out of the transfer press when the mold is replaced, and a bolster plate unit that is fixed to the transport drive unit and mounts the lower die. G)
The bolster plate is fixedly mounted on the transport driving device symmetrically with respect to the center position between the left and right columns. H) The left and right tie rods and nuts are disposed symmetrically with respect to the center position between the left and right columns. A transfer press comprising the above. 2. The transfer press according to claim 1, wherein the transfer press has a slide which moves up and down by providing four point units, and a distance between the point units before and after on the upstream side in the work transfer direction and a front and rear on the downstream side in the work transfer direction. Wherein the point units are disposed symmetrically or asymmetrically with respect to the center position of the slide in the front-rear direction. 3. The method according to claim 1, wherein the left column and the right column having different cross-sectional areas are sandwiched between a crown and a bed, and the left tie rod, the right tie rod and the nut having different cross-sectional areas are preloaded. A transfer press characterized by fastening to form a frame.