JPS63115633A - Automatic die changing method for press machine - Google Patents

Abstract

PURPOSE:To improve working efficiency and to secure safety in working by performing a die changing work with the automatic control by the program of the device attached to a press machine including the traveling device of a moving bolster. CONSTITUTION:The program for automatic control for changing a die is fixed, the device attached to a press machine is automatically controlled by this program and driven in the specified order., and the die change is automatically performed. Namely, while from after completion of a press work until the press starting by the succeeding die according to the program, a traveling device runs a moving bolster 16 and a clamping device 44 combines an upper die 17 with the lower face of a slide 14. A clamping device 37 fixes the moving bolster 16 to a pressing position and an adjusting device adjusts the inner width of a feed bar 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for changing molds by replacing two moving bolsters of a press machine, and particularly relates to a method for automatically changing molds based on a program. Regarding how to do it.

[Background technology and its problems]

In a type of press machine that performs mold replacement work by replacing two moving bolsters, the two moving bolsters are run between the end of the press work and the start of the press work with the next mold, and the positioning of the moving bolsters is changed. The positions are mutually exchanged between a press processing position inside the press machine and a die exchange position outside the press machine.

In order to replace the mold, in addition to running the moving bolster as described above, various devices such as the clamping device to connect the upper mold to the slide and the clamping device to fix the moving bolster in the press processing position are driven. I have to do it. In addition, when replacing the mold, the inner width of the feed bar, the pressure of the Gui cushion device, and the counter of the slide will change depending on the size and weight of the mold, or the thickness and shape of the blank to be pressed with that mold. The pressure of the balance cylinder must be adjusted.

Conventionally, various operations required for such mold replacement have been performed by operators. According to this, there are many work items that workers must perform, and each work must be performed in the correct order, which makes the work tedious and requires a lot of effort and time. Therefore, there was a problem that work efficiency decreased.

[Object of the Invention] An object of the present invention is to provide an automatic mold replacement method for a press machine that can automate the mold replacement work and improve work efficiency.

[Means and operations for solving the problem] In order to achieve the above objects, the method according to the present invention alternately moves two moving bolsters to the press processing position inside the press machine and the die exchange outside the press machine. For a press machine that performs die change work by moving to and from a new position, an automatic control program for die change work is defined, and this program controls the process from the end of press work until the start of press work with the next die. A traveling device that runs the moving bolster between them, a clamp device that connects the upper mold to the slide, a clamp device that fixes the moving bolster at the press processing position,
Furthermore, the devices attached to the press machine, such as the adjustment device that adjusts the inner width of the feed bar, are automatically controlled, and the mold replacement work is automatically performed by driving these devices in a predetermined order. There is.

The program is determined for each mold to be replaced, and the internal width of the feed bar, the pressure of the Gui cushion device, and the pressure of the counterbalance cylinder are set in these programs for each mold. The inner width of the feed bar, etc. can be automatically adjusted at the same time as mold replacement.

The program may be input as input data to a storage device in an automatic control device that automatically controls the driving of the traveling device of the moving bolster, etc., or may be recorded on, for example, a magnetic card that is read by a reading device of the automatic control device. You can leave it as is.

〔Example〕

FIG. 1 is a plan sectional view of a transfer press machine to which the method according to the present embodiment is applied, and FIG. 2 is a front sectional view thereof.

As shown in Fig. 1, first and second blank supply carts 2, 3 are arranged on the left side of the transpress machine 1, and these blank supply carts 2, 3 are moved along the rail 4 to the blank supply position A and the cart retraction. Position B.

Go back and forth between C alternately. As shown in Figure 2, blanks 5 (the blanks of the second blank supply truck 3 are indicated by 5'' in Figure 1) are loaded and stored inside each blank supply truck 2.3, and the blanks 5 are loaded and stored inside each blank supply truck 2. In the first blank supply cart 2 that is
is lifted, and each blank 5 is supported vertically and spaced apart by a magnetic float device 8 through a hook member 7 that rotates only upward.

The uppermost blank 5 is sent to a blank chute 10 by a pick-up device 9 of the transfer press machine 1. As shown in FIG. 1, the blank chute 10 consists of two individual chutes 10A, and the interval between them can be adjusted by a blank chute interval adjusting device 11 shown in FIG. As shown in FIG. 1, the transfer press machine l is equipped with two feed bars 12 for conveying blanks, and a slide 14 shown in FIG.
While the feed bar 12 moves up and down once with the rotation of the crankshaft 13, the feed bar 12 approaches for blank clamping, rises, moves forward (moves to the right in Figures 1 and 2), descends, and unclamps the blank. During the ^U interval, the blank conveyance operation is performed once in the backward direction. By repeating this, blank 5
is the upper mold 17 attached to the lower surface of the slide 14 from the blank chute 10 by the finger 15 of the feed bar 12.
and the lower die 18 attached to the upper surface of the first moving bolster 16, and the
The blank 5 is sequentially sent to a plurality of processing stages, and at each processing stage, the blank 5 is pressed by vertical movement of the slide 14.

During the second press process, the weights of the upper mold 17 and the slide 14 are balanced and supported by the air pressure of the counterbalance cylinder 19, and this pressure can be adjusted by a counterbalance pressure adjusting device 2o shown in FIG. Also, as in the second article, inside the first moving bolster 16, the blank 5 is pressed upward with air pressure in order to prevent wrinkles from occurring in the blank 5 during press working by the upper die 17 and the lower die 18. A cushion device 21 is provided for resilient support, and the pressure and vertical movement stroke of this cushion device 21 are controlled by a pressure adjustment device 22 shown in FIG.
Adjustment is possible with the cushion stroke adjustment device 23.

The blank 5, which has become a finished product in the final processing stage, is transferred to the product container 72 in Fig. 2 by the conveyance operation of the feed bar 12.
It is discharged at 4. As shown in FIG. 1, the product conveyor 24 consists of two conveyor units 24A, and the interval between them can be adjusted by a product conveyor interval adjustment device 25 shown in FIG.

Among the above-mentioned blank conveyance operations of the feed bar 12, approaching, separating, raising, and lowering are performed by the feed bar holding members 27 of the drive unit 26 provided on both sides of the transfer press machine 1. Further, forward movement and backward movement are performed by sliding the feed bar 12 relative to the feed bar holding member 27 by a drive unit 28 provided on the right side of the transfer press machine 1. The drive unit 26 is driven by a cam attached to the slide 14 that drives levers, ronds, etc. by the vertical movement of the slide 14, and the drive unit 28 is driven via a feed bar drive force transmission path (not shown). This is achieved by the transmitted driving force of the crankshaft 13, and this feed bar driving force transmission path can be freely connected and disconnected by a coupling device 29 shown in FIG.

As shown in Figure 1, the transferless machine 1 is
In addition to the moving bolster 16, a second moving bolster 30 is provided, and these moving bolsters 16.3
0 is the press working value iD inside the transfer press machine 1 along the rail 31 and the die exchange position E outside the transfer press machine 1.

It alternately goes back and forth between F and F. In the state shown in FIG. 1, the first moving bolster 16 has reached the press working value ffD, while the second moving bolster 30 has reached the mold exchange position F. The movement of the moving bolster 16.30 is effected by means of a traveling device 32, which is shown in FIG. Also inside the second moving bolster 30 is the pressure adjustment device 22) the cushion stroke adjustment device 2.
3, a cushion device 21 is provided in which the pressure and vertical stroke are adjusted.

As shown in FIG. 2, the wheels 33 of the first moving bolster 16 that have reached the pressing position fall into the recess 36 in which the lift device 35 of the bed 34 of the transfer press machine 1 is incorporated, and the first moving bolster 16 is placed at that position. The moving bolster 16 is fixed by a clamping device 37. Lift device 3
5. The clamping device 37 is also shown in FIG.

As shown in FIG. 3, the feed bar 12 consists of a central bar 12A and end bars 12B at both ends, and these bars 12A,
12B can be connected and separated by a joint device 38 shown in FIG.

The outfit shown in Figure 4 explained above! 11,20.22゜23.2
5, 29, 32.35, 37.38 are upper and lower type 17.18
This is a device attached to the transfer press machine 1 for replacing a mold consisting of a mold. In addition to this, the transfer press machine 1 has a device 4 shown in Fig. 4 for mold exchange work.
0,41,42.43,44.56 are attached.

The lifting device 40 is a transferless machine 1 as shown in FIG.
Safety guards 45 installed on the front and rear sides of the
This is a device for moving up and down.

The feed bar inner width adjustment device 41 is a device for adjusting the inner width of the feed bar 12, that is, the interval between the two feed bars 12, depending on the size of the mold to be replaced. Independent approach/separation device 42) and independent advance/retreat device 43
In addition to the rotation of the crankshaft 13 and the vertical movement of the slide 14, the feed bar 12 is independently approached, separated, and advanced;
This is a device for reversing the vehicle. Independent forward and backward device 43
The feed bar driving force transmission path is connected to the coupling device 2.
This is done when it is cut by 9. The clamp device 44 is a device for attaching and removing the upper mold 17 to the lower surface of the slide 14. The slide adjustment device 56 is a device for adjusting the die-hide of the slide 14.

The above devices 11, 20, 22. 23, 25, 29. 32
．． 35.37, 38.40, 41, 42゜43.44.
56 is a central processing unit (CP) that constitutes the automatic control device 46.
U) Connected to 47. The automatic control device 46 is the storage device 4
In this storage device 48, an automatic control program for mold replacement work is stored in advance as input data from an input device 49 via the central processing unit 47. ,23,25゜29
．． 32.35, 37.3B, 40, 41, 42.43,
44.56 drive order, drive speed, etc. are defined. In addition, a program is determined for each mold to be replaced, so that each program has a different feed bar 12.
The inner width of the feed bar 12 and the spacing of the blank chutes 10 are set, and the inner width of the feed bar 12 and the spacing of the blank chutes 10 are set depending on the size, shape, etc. of the mold to be replaced and the blank to be pressed with the mold. It is set to be compatible.

Next, the mold replacement work will be explained based on the flowchart shown in FIG.

In FIG. 5, the part surrounded by the dashed line 50 is the part of the automatic mold exchange work set by the program.

The blank 5 supplied from the first blank supply trolley 2 is placed between the upper die 17 of the slide 14 and the first moving bolster 1.
Pressing work 51 is performed by pressing with the lower mold 18 of 6, and while this pressing work 51 is being performed by automatic operation, the upper surface of the second moving bolster 30 that has reached the mold exchange position F is Attach the lower die to be used for the next press operation, and place the upper die on top of the lower die. Also,
Feed bar pedestal 54 of second moving bolster 30
A finger 15'' to be used for the next press operation is attached to the central bar 12A'' of the feed bar held at 15°. Furthermore, while the pressing operation 51 is being performed, the mounting position of the magnetic float device 8 on the second blank supply cart 3 is changed to a position where it can support the blank 5' to be pressed in the next pressing operation.

When the press work 51 is finished, the slide 14 stops at a fixed position where the rotation angle of the crankshaft 13 is a predetermined angle,
Further, the feed bar 12 is stopped in the blank clamp state at the retreated position.

After the press operation 51 is completed, the input device 49 is operated to select a program created for the mold to be used for the next press operation from among the programs stored in the storage device 4. This selection operation is indicated by reference numeral 52 in FIG.

After the program selection work 52 is completed, the input device 49
The central processing unit 4 sends a start signal for automatic mold replacement work by the operation of
Based on the selected program, the central processing unit 47 sends a message to the device 11.20°22.23,25,29,3.
2.35.37.38.40,41,42,43,44
．． 56 is started, and automatic mold exchange work begins. This automatic mold exchange work starts with a pre-work 53, in which the interval between the feed bars 12 is widened by the feed-bar inner width adjustment device 41, and the feed bars 12 are approached independently.
The spacing device 42 further expands the position of each feed bar 12 so that the position of each feed bar 12 is adjusted to the feed bar cradle 54 provided on the first moving bolster 16 shown in FIG.
The distance between the blank shades 10 is minimized with the blank chute spacing adjustment device 11, and the spacing between the product conveyors 24 is minimized with the product conveyor spacing adjustment device 25.

Next, an upper die removal operation 55 is performed, in which the slide 14 is lowered to the bottom dead center by slow rotation of the crankshaft 13, and then the clamp of the clamp device 44 that connects the upper die 17 to the slide 14 is released. Then, transfer the upper mold 17 to the lower mold 1.
This is done by placing it on top of 8. Thereafter, the slide 14 is returned to the home position by the slow rotation of the crankshaft 13.

Next, a carry-out preparation operation 57 is performed to carry out the center bar 12A of the feed bar 12 together with the first moving bolster 16 to the mold exchange position E.

The central bar 12A is brought out at the mold exchange station RE in order to replace the finger 15 attached to the central bar 12A with one corresponding to the mold to be used in the next press operation. Work 57 starts by disconnecting the feed bar drive force transmission path by the coupling device 29, and then moves the feed bar 12 forward and backward by itself.
to move forward by half of the forward and reverse strokes during automatic operation. Thereafter, the connection between the center bar 12A and the end bar 12B of the feed bar 12 by the joint device 38 is released.

The next work to be performed is a preparatory work 58 for moving the first moving bolster 16. This work 58 is carried out on the lift device 35 after releasing the clamp of the clamp device 37.
This is done by pushing up the wheels 33 of the first moving bolster 16 and raising the first moving bolster 16.

At this time, the feed bar pedestal 54 that rises together with the first moving bolster 16 is fitted into the center bar 12A from below, and the center bar 12A is pushed up by the feed bar pedestal 54 to form the end bar 12B and the feed bar 12A. It is separated from the holding member 27.

Thereafter, a lifting operation 59 of the safety guard 45 that shields the front and rear surfaces of the transfer press machine 1 is performed using the lifting device 40.

After the front and rear surfaces of the transfer press machine 1 are opened by raising the safety guard 45, an operation 60 of moving the first and second moving bolsters 16, 30 is performed by the traveling device 32. As a result, the first moving bolster 16 is moved from the press working value iJD to the die exchange position E, and the second moving bolster 30, on which the die to be used for the next press operation is placed on the upper surface as described above, is moved to the die exchange position E. Mold exchange position I
F to the press working position, and the positions of both moving bolsters 16 and 30 are exchanged.

At this time, the central bar 12A, which moves to the mold exchange position E together with the first moving bolster 16, is being advanced by the independent advancement/retraction device 43 as described above, so that the central bar 12A moves forward as shown in FIG. 1 of the transfer press machine 1. There is no interference with column 61 shown in .

The second moving bolster 3 has reached the pressing position
The wheels of No. 0 are transferred from the rails 31 to the lifting device 35 of the bed 34, and then the lifting device 35 is lowered to lower the height position of the second moving bolster 30, and the second moving bolster 30 is moved by the clamping device 37. Moving bolster 3
Clamp 0. When the second moving bolster 30 is lowered, the central bar 12A' held at the feed bar cradle 54° of this moving bolster 30 rests on the end bar 12B remaining in the transfer press machine 1 from above, Moreover, the central bar 12A' is held by the feed bar holding member 27 and is separated from the feed bar pedestal 54°, which is lowered together with the second moving bolster 30.

Next, a lowering operation 62 of the safety guard 45 is performed using the lifting device 40, and the front and rear surfaces of the transfer press 1M10 are shielded by the safety guard 45.

In the second moving bolster 30, a preparatory work 63 is performed to prepare the feed bar to a state in which the next press work can be performed. That is, the center bar 12A' and the end bar 12B are connected by the joint device 38, and the interval between the two feed bars is adjusted by the feed bar inner width adjustment device 41 to correspond to the size of the mold to be used for the next press operation. Further, the feed bar is returned to the retracted position during press operation by the independent advance and retract device 43. Thereafter, the feed bar driving force transmission path is reconnected by the coupling device 29.

A slide adjustment work 64 is performed between the completion of the upper mold removal work 55 and the feed bar preparation work 63 described above, and this work 64 is performed to adjust the height of the die to be used for the next pressing work. In this work, the height position of the slide 14, which is stopped at the fixed position, is adjusted by the slide adjustment device 56.

Next, an operation 65 for attaching the upper mold to the slide 14 is performed. In this work 65, first move the slide 14 to the crankshaft 1.
3, the slide 14 is lowered to the bottom dead center at a low speed rotation, whereby the slide 14 is lowered to the same height position as the Guihide adjusted by the slide adjustment device 56, and the slide 14 is attached to the second moving bolster 30. contact with the upper mold placed on the lower mold. Thereafter, the upper mold is coupled to the slide 14 by the clamp device 44, and the slide 14 is raised to a fixed position by operating the crankshaft 13 at a low speed.

After this, the remaining preparatory work 66 necessary for performing the next press work is performed. That is, the two feed bars are brought closer to each other by the separating device 42 to the approaching position of the blank clamp state, and as a result, the position of the slide 14, which has been returned to its normal position, and the position of the feed bar coincide with those during the press operation. .

Also, the interval adjustment device 11.25 is adjusted so that the interval between the blank chute 10 and the product conveyor 24 corresponds to the size of the blank 5' to be pressed in the next press operation.
further adjusted by the second moving bolster 30
The cushion stroke of the Gui cushion device is adjusted by the Gui cushion stroke adjustment device 223 to correspond to the molding shape of the blank 5'', etc.

Between the preparatory work 53 and the preparatory work 66 for the press work described above, the second pressure adjustment device 22
An operation 67 is performed to adjust the pressure of the cushioning device of the moving bolster 30 to a value suitable for pressing the blank 5, and when the moving bolster 30 reaches the pressing position, the cushioning device becomes the air pressure supply source. , the pressure of the Guicushion device has been changed to a predetermined value at the end of the preparatory work 66. Also, between the pre-work 53 and the preparation work 66,
The counterbalance pressure adjusting device 20 adjusts the air pressure of the counterbalance cylinder 19 to a new slide 14.
It took six days to adjust the weight of the upper die and slide 14 attached to the slide 14.

With the above steps, the automatic mold replacement work by the program is completed.

Note that between the press operation 51 and the start of the next press operation 70, the first and second blank supply carts 2
．． 3 is replaced, and the first blank supply cart 2 is sent from the blank supply position iA to the retracted position C, and the second blank supply cart 3 is sent from the retracted position B to the blank supply position A. . In this embodiment, this replacement work 69 is performed separately from the automatic mold replacement work based on the program.
By connecting the traveling device to the automatic control device 46, the replacement work 69 may be performed as one of the automatic mold replacement works according to a program.

After a signal indicating that the automatic mold replacement work has been completed is output from an output device (not shown) of the automatic control device 46, the operator turns on the switch of the main motor that drives the crankshaft 13.
The next press operation 70 is started.

While this press work 70 is being performed, a work 71 is performed in which a mold to be used for the next press work after the press work 70 is placed on the upper surface of the first moving bolster 16 that has reached the mold exchange position. be exposed.

This operation 71 begins by pivoting the feed bar pedestal 54 holding the center bar 12A outward about the spindle 72 as shown by the second moving bolster 30 in FIG. 2 central bars 12A
The interval between the two is widened, and the upper surface of the first moving bolster 16 is opened to secure the space necessary for performing the work 71.

At this time, the fingers 15 of the central bar 12A are pressed during the press operation 7.
0 will be replaced with a new finger to be used in the next press operation. After attaching a lower mold to the upper surface of the first moving bolster 16 and placing the upper mold on top of the lower mold, the feed bar pedestal 54 is rotated in the opposite direction to that described above and returned to its original position.

This completes preparations for the next automatic mold exchange operation for the first moving bolster 16.

The sequence of automatic mold changing work shown in Figure 5 is as shown in Figures 1 and 2.
This is a work order applied to the transfer press machine 1 having the structure shown in the figure, and the work order and work items can be arbitrarily determined according to the structure of the press machine.
In the figure, pressure adjustment work 67, counterbalance pressure adjustment work 68, and preparation work 66 for press work are shown.
Alternatively, in a press machine where the intervals between the blank chute and the product conveyor remain unchanged, the work of adjusting these intervals may be omitted.

Furthermore, in the above embodiment, the program for the automatic mold replacement work was stored as input data on the 4th day in the storage device of the automatic control device 46, but this program can be input as magnetic recording information into a magnetic card, for example, and the automatic mold replacement work can be performed automatically. The control device may be equipped with a reading device for reading this recorded information, and based on the read information, a device attached to the press machine may be controlled to perform automatic mold exchange work.

〔Effect of the invention〕

According to the present invention, it becomes possible to automate the mold replacement work that was conventionally performed by an operator, thereby improving work efficiency and further ensuring work safety.

[Brief explanation of the drawing]

Figure 1 is a plan sectional view of the transfer press machine, Figure 2 is a front sectional view of the same, Figure 3 is a front view of the feed bar, Figure 4 is a block diagram showing the electrical configuration, Figure 5 is mold replacement. FIG. DESCRIPTION OF SYMBOLS 1... Transfer press machine, 2, 3... Blank supply trolley, 13... Crankshaft, 14... Slide, 16.30... Moving bolster, 17...
Upper mold, 18...lower mold, 34...head, 46...
Automatic control device, 48... Memory device, D... Pressing position, E, F... Mold exchange position.

Claims (2)

[Claims] (1) In a press machine in which the die exchange work is performed by alternating the positions of two moving bolsters placed at a press processing position inside the press machine and a die exchange position outside the press machine, the die exchange An automatic control program for the work is determined, and the equipment attached to the press machine, including the traveling devices of the two moving bolsters, is controlled by the program between the end of the press work and the start of the press work with the next mold. An automatic mold changing method for a press machine, which is characterized by performing mold changing work under automatic control. (2) The press according to claim 1, wherein the program is determined for each mold to be replaced, and the inner width of the feed bar, etc. for each mold is set in the program. Automatic mold exchange method for machines.