JPS63144900A - Die height adjuster for mechanical press - Google Patents

Abstract

PURPOSE:To greatly suppress impact noise, wear and deformation at the time of punching by providing a means for fixing a driven side member to a main driving side member by a clamp in the state in which the clamp is driven by a means for driving the clamp to the clamping side. CONSTITUTION:The clamp 31 is driven to an unclamping side by the means 34 for driving the clamp at the time of adjusting a die height (h). A slide 4 is then advanced and retreated by an expanding and contracting mechanism 30 to adjust the die height (h). The clamp 31 is driven by the means 34 to the clamping side to fix the driven side member B to the main driving side member A of the mechanism 30 by the clamp 31. There are, therefore no idle spaces at all in the mechanism 30 after the adjustment of the die height (h) and the integrated spacing of the of a mechanism 8 for driving the slide is decreased. The impact noise, wear and deformation to be generated at the time of punching are greatly suppressed by this device.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a die height adjustment device for a mechanical press, which eliminates the floating gap remaining after the die height adjustment and eliminates the generation of impact noise due to breakthrough during press punching. This is a technology that suppresses

(Basic structure as a premise) The basic structure of the die height adjustment device is as follows.

For example, as shown in FIGS. 1 and 2 or 5, a slide 4 of a mechanical press l is interlocked and connected to a prime mover 9 via a slide drive mechanism 8, and the slide is moved from the frame 2 through the slide drive mechanism 8. A die height adjustment telescopic device 18 is interposed between the output end iW<17 of the die height adjustment device 1 and the die height adjustment telescopic device 18 is connected to the telescopic adjustment operating device 1
9, it is configured to be able to drive and stop 1' in the direction of expansion and contraction.

In this basic structure, as is well known, Freno 2
A movement gap exists at each connecting portion from the slide drive mechanism 8 to the slide 4, and a total accumulation gap is formed.

In the punching operation of a mechanical press, when the punch punches a processed plate, the frame 2 is elastically deformed by the reaction force, and immediately after punching, the slide 4 is moved via the slide drive mechanism 8 by the reaction force of the frame 2. It is suddenly launched due to the breakthrough, and 1) it causes a collision at each part forming the accumulation gap of η, causing impact noise, wear, and deformation.

In recent years, mechanical presses have rapidly become faster and more compact, and the above-mentioned noise problem has become more serious. Therefore, it is required to suppress the noise 4' as much as possible.

(Prior art) In the above basic structure, the die height adjustment expansion and contraction device 1
Conventionally, the structure of 8 was as shown in FIGS. 5 and 6.

That is, a height adjustment screw part 80 is interposed in the middle of the connecting rod 24 of the slide drive mechanism 8, and the male screw 82 of the small end part 26 is fitted into the female screw 81 of the large end j1 < 25 so that it can freely move forward and backward. It is something.

This conventional structure works as follows.

When adjusting the die height, the connecting rod 24 is rotated by the height adjusting electric motor 41 of the telescopic M section operating device 19 by rotating the small end 26 side via the gear transmission mechanism 83.
The die height h is adjusted by adjusting the length of and moving the slide 4 forward and backward in the height direction.

- On the other hand, during press work, the press force is transmitted from the large end 25 to the slide 4 via the height adjustment screw part 80 and the small end 26, and the die set 11 punches the work plate 15. Ru.

(Problems to be Solved by the Invention) The prior art described in 1- is superior in that the die height h can be easily adjusted. However, the following problem remained.

b9 The mechanical press is noisy.

In order to smoothly rotate the small end portion 26 with the height adjusting electric motor 41, as shown in FIG.
It is necessary to form a screw fitting gap e between the height J
Since the fi1 joint threaded portion 80 needs to have a large diameter in order to transmit the pressing force, the screw fitting gap C also becomes large accordingly.

In addition, whereas the mechanical press 1 performs the 54 joints when it is cold before operation, it warms up enough and expands during the steady operation of punching, so the screw fitting gap C described in iii. becomes even larger.

This large screw fitting gap e increases the surface accumulation gap of the slide drive mechanism 8, so impact noise, wear, and deformation due to breakthrough are large.

[1. A large electric motor is required to save height.

The threaded portion 80 with a height of 58 nodes needs to have a large diameter for transmitting pressing force, so the frictional resistance during driving is large and the transmission efficiency is low. For this reason, a large-sized height adjustment motor 41 will be required, and energy loss will be large.

Furthermore, when attaching the screw set 11 to the mechanical press l, a preload is applied by the height adjustment electric motor 41, but in this case as well, the transmission efficiency is low for the above-mentioned height 1 screw M section screw: W < 80. Therefore, a larger height adjustment motor 41 is required, and energy loss also increases.

The present invention prevents the occurrence of a floating gap in the expansion and contraction device for one section of Guiheitoyu, and eliminates impact noise, wear, and deformation.
Another object of the present invention is to reduce the size of the telescopic adjustment operating device.

(Means for Solving the Problems) In order to achieve the above object, the present invention adds the following improvements to the above basic structure.

That is, for example, as shown in FIG. 1 and FIG.
The telescoping adjustment operating device 19 is comprised of a telescoping mechanism driving means 33 and a clamp driving means 34, and the telescoping mechanism 30
The clamp 31 is configured to be able to be driven for expansion/contraction adjustment by the telescopic mechanism driving means 33, and the clamp 31 is configured to be clamp driven by the clamp driving means 34. When the clamp 31 is driven toward the clamp side by the clamp driving means 34, Clamp 3 the driven side member B against the driving side member A of the telescopic mechanism 30.
1 is characterized in that it is fixed in a state that does not allow it to move freely in the direction of expansion and contraction.

(effect) The invention works as follows.

When adjusting the die height, first use the clamp drive means 34 to clamp 3! to the unclamp side. Next, the telescoping mechanism 30 is telescopically driven by the telescoping mechanism driving means 33 to move the slide 4 forward and backward in the height direction, thereby increasing the die height to 18 sections. Then, the clamp 31 is driven toward the clamp side by the clamp driving means 34, and the driven side member B of the telescopic mechanism 30 is identified by the clamp 31 with respect to the active side member A. Therefore, after the die height is adjusted, there is no floating gap in the telescoping mechanism 30, and the accumulation gap in the slide drive mechanism 8 becomes smaller. This greatly reduces impact noise, wear, and deformation caused by breakthrough during punching.

(Example) Embodiments of the F1 invention will now be described with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 show a first embodiment, in which FIG. 1 is an enlarged sectional view of the main part of FIG. 2, and FIG. 2 is a side view of a mechanical press.

In the second garden, l is a crank press (mechanical press), which has a C-shaped frame 2. A slide 4 is supported by a frame 2 via a slide guide 5 so as to be able to freely detect l pressure with respect to a bed 3 provided on the front side of the crank press 1. Further, a bolster 6 is fixed to the bed 3.

The slide 4 is interlocked and connected to a main motor 9 via a slide drive mechanism 8, and is driven in the vertical direction. Reference numeral 11 denotes a die set for punching, and this has a die 12 and an upper die 13 which are movable up and down via guide posts 14. The lower mold 12 is fixed to the bolster 6, and the upper mold 13 is an adapter plate (output end) of the slide 4.
It is fixed at 17. 15 is a processed plate.

Then, the die height h is adjusted according to the height dimension of the die set 11. That is, from the frame 2 through the slide drive mechanism 8 to the adapter plate 17 of the slide 4.
As shown in FIG.
Constructed so that it can be stopped at any time.

First, the slide drive mechanism 8 will be described. A crankshaft 21 is supported on the upper part of the frame 2, and a crank 22 is provided at the front part of the crankshaft 21, while a piston 23 is fitted into the fitting hole 4a of the slide 4 so as to be slidable under -H.

- Connecting rod 2 between the crank 22 and the piston 23
4 is provided. The connecting rod 24 has a large end 25 connected to the crank 22 and a small end 26 connected to the second part of the piston 23 via a ball joint 27 . 2. The large end portion 25 and the small end portion 26 are removably fixed to each other by a screw connection portion 28.

Next, the die height adjusting telescopic device 18 and the telescopic member M
To explain the joint operation device 19, the die height adjustment telescopic device 18 is composed of a telescopic mechanism 30 and a clamp 31, and the telescopic adjustment device 19 is comprised of a telescopic mechanism driving means 33 and a clamp driving means 34. The telescopic mechanism 30 is configured to be telescopically adjustable and driven by a telescopic mechanism driving means 33, and the clamp 3! is configured such that it can be driven by a clamp driving means 34.

1. The telescopic mechanism 30 has a height adjustment screw 36 fitted to the lower part of the piston 23 so as to be freely adjustable forward and backward. The height adjustment screw 36 has its lower part supported in a circular manner by the lower part of the slide 4 via the linear guide 37.
It is pressed against the slide 4 by a compression spring 38. 39 is
It is a spring holder.

When the piston 23 is rotated around the axis of the connecting rod 24 via the ball joint 27, 1. A height adjusting screw 36 moves up and down with respect to the piston 23, and the slide 4 is lowered by η1 via this height adjusting screw 36.

The rotation of the piston 23 of F2 is performed by the height adjusting electric motor 41 of the telescopic mechanism driving means 33.

That is, a driving gear 42 is fixed to the output shaft of a height adjusting electric motor 41. On the other hand, a driven gear 43 on one part of the outer peripheral surface of the piston 23 is relatively moved downward via a linear guide 44. can be freely engaged. The driven tooth 43 is the L of the slide 4.
It is freely rotatably supported by the drive vi41, and the four
It is interlocked with 2. When the height adjusting electric motor 41 is driven, the piston 23 is rotated r+4 via the driving gear 42 and the driven teeth 43. As a result, the height adjustment screw 36 is raised and lowered 5I as described above, and the slide 4 is raised and lowered relative to the slide guide 5 via the straight guide 44.

Further, the clamp 31 is attached to a cylinder 46 that is fixed in the middle of the slide 4 in the downward direction.

A friction contact tube 47 is provided between the inner peripheral surface of the cylinder 46 and the outer peripheral surface of the piston 23. The friction contact tube 47 is
1-)' Both ends are fitted and fixed to the cylinder 46 in an oil-tight manner,
A hydraulic oil chamber 48 is located between the cylinder 46 and the friction contact cylinder 47.
is formed. The inner circumferential surface of the friction contact tube 47 is brought into contact with the outer circumference of the piston 23 so as to be movable in the first and second phases.

Then, the clamp driving means 34 is placed in the -1- hydraulic oil chamber 48.
The pressure Mb is supplied from the booster pump 50 through the oil supply pipe 51.
When injected, the friction contact cylinder 47 is pressed against the outer periphery of the piston 23, and the piston 23 constituting the driving side member A,
The slide 4 constituting the driven side member B is frictionally fixed with a predetermined clamping force.

Even if a press reaction force acts on the slide 4 during press working, the slide 4 is held against the piston 2 by the frictional fixing force.
Since it is firmly frictionally fixed to the slide 4, the pressing force is reliably transmitted to the slide 4.

Note that an overload safety device may be configured using the clamp 31 described in 1-. In this case, the clamping force of the clamp 31 is set to a value approximately equal to the full load of the crank press. If an overload is applied to the slide 4 during press working, the friction fixing force +iq cannot withstand it, and a slip occurs between the friction contact tube 47 and the piston 23, which prevents the slide 4 from descending due to the overload. )--Although the lowering of the connecting rod 24 is allowed. This provides overload safety operation.

Further, in this embodiment, the mechanical press is described as a crank press I, but this may be a knuckle press.

Furthermore, the die height adjustment expansion/contraction device 18
It may be provided in a portion between the output end 17 of the slide 4 via the slide drive N1t8, and for example, it may be provided in the connecting rod 24.

FIGS. 3 and 4 show other embodiments, and the configuration different from the first embodiment will be described.

(Second Embodiment) FIG. 3 shows a second embodiment. In this embodiment, the piston 23 rotates relative to the connecting rod 24! The first bottle 60 is rotated and removed. Also, height 54 node screw 36
is formed into a cylindrical shape, and is screwed into the lower part of the piston 23 through its female threaded hole. A driven tooth 43 is provided at the 1] part of the height adjustment screw 36, and that! - is pressed against the lower surface side of the cylinder 46 via the compression spring 38 so as to be freely rotatable. The drive shaft 61 is downstream from the height adjustment electric motor 41, and its F
A drive gear 42 is fixed to the end. This is 43 for driven tooth
are interlocked.

When adjusting the die height, the height adjustment electric motor 4I
When driven, the height 54-node screw 36 is raised and lowered via the drive tooth 1fL42 and the driven tooth 43, and the slide 4 is thereby lowered.

In addition, 62 is a die height display means, which consists of a transmission tooth mechanism 63 driven by a driven southeast 43 and a die height counter 64. Further, 65 is a limit switch, which detects the above-mentioned overload safety operation.

(Third Embodiment) FIG. 4 shows a third embodiment. In this embodiment, a portion of the piston 23 is slidably supported by the frame 2 via a piston guide 68.

1. Within the piston guide 68, a 14-tooth tooth 69 is fitted onto the outer circumferential surface of the piston 23 via the linear guide 44 so as to be movable. The worm 69 is driven by the height adjustment electric motor 41 fixed to the piston guide 68. In this way, the height J, &1-node electric motor n,
41 is during press processing E? It is less likely to be damaged because it will not be hit by a JR.

(Effects of the Invention) The present invention has the following effects because it is configured and operates as described in I-.

After the JAI section of the die height, the accumulation gap of the slide drive mechanism can be reduced by fixing the active side member and the driven side member of the telescopic mechanism with a clamp to eliminate the free movement gap between these rain sounds. This will greatly reduce the impact noise, wear and deformation that occur during punching.

[1] The expansion and contraction mechanism is such that the driven side member only expands and contracts with respect to the 1-cut side r5< material, and the G that transmits the pressing force is
Because it is not a metal, frictional resistance is small and transmission effectiveness and strength are high. For this reason, the telescoping mechanism drive stage could be made smaller and with lower capacity, which would consume less energy.
d is small. Also, when installing a die set in a mechanical press, a preload is applied to the die set using a telescopic mechanism drive means, but in this case, the die set is preloaded.
Since the telescoping mechanism has high transmission efficiency, the telescoping mechanism driving means can be made small and with low capacity, and energy consumption:
d There is no need for mozuku.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention, and FIGS. 1 and 2 are one embodiment of the present invention. FIG. 1 is an enlarged vertical cross-sectional view of FIG. The side view of the mechanical press, No. 31 Threshold and No. 4E'ytJ are views corresponding to Fig. 1 showing other embodiments, Fig. 5 and Fig. 6 show the conventional example, and Fig. 5 is a sectional view of the main part. , FIG. 6 is a longitudinal section of the height adjustment screw. 1... Crank press (mechanical press), 2... Frame, 4... Slide, 8... Slide drive mechanism, 9... 1 Seismic U-motor (prime mover), 17.
...Adapter plate (output end arm), 18...
Die height adjustment telescopic device, I9... telescopic adjustment operating device, 23... piston, 30... telescopic mechanism,
31... Clamp, 33... Telescopic mechanism driving means,
34...Clamp driving means, A...Archive cutting side i1
<Material, 13... Driven side member. Patent applicant Amada Co., Ltd. Cosmetics Co., Ltd. Agent
Hisashi Kitaya =-Figure 1
8 Figure 2 Figure 5. Figure 3 Figure 4

Claims (1)

[Claims] 1. The slide 4 of the mechanical press 1 is interlocked and connected to the prime mover 9 via the slide drive mechanism 8, and the period from the frame 2 to the output end 17 of the slide 4 via the slide drive mechanism 8. A die height adjustment telescopic device 18 is interposed in the portion, and the die height adjustment telescopic device 18 is connected to the telescopic adjustment operating device 1.
In the die height adjusting device for a mechanical press configured to be able to drive and stop the adjustment in the direction of expansion and contraction at 9, the expansion and contraction device 18 for die height adjustment is constituted by an expansion and contraction mechanism 30 and a clamp 31, and the expansion and contraction adjustment operation device 19 is constituted by an expansion and contraction mechanism driving means 33. and a clamp driving means 34, the telescoping mechanism 30 is configured to be able to be driven for expansion/contraction adjustment by the telescoping mechanism driving means 33, and the clamp 31 is configured to be able to be clamped and driven by the clamp driving means 34, and the clamp driving means 34 is configured to allow the clamp to be driven. 31 is driven toward the clamp side, the driven side member B of the telescoping mechanism 30 is fixed to the driving side member A with the clamp 31 in such a state that it does not allow free movement in the expansion/contraction direction. die height adjustment device 2, and a piston 2 at the lower transmission portion of the slide drive mechanism 8.
3 into the slide 4 so that it can slide up and down, and the piston 23
is fixed to the slide 4 with a clamp 31, and this clamp 3
1 is set to a value approximately equal to the full load of the mechanical press 1, and when an overload is applied to the slide 4, the piston 23 slides downward against the slide 4 against the clamping force of the clamp 31. A die height adjusting device for a mechanical press according to claim 1, which is configured to operate safely under overload.