JPH0310414B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for supplying a workpiece to a press machine for press processing, and for discharging the workpiece after press processing from the press machine. Relating to a release device.

[Problems to be solved by conventional technology and invention]

As a conventional device of this type, for example,
A device described in Japanese Patent No. 52-57483 is known.
That is, this device has two forks that perform rectangular movements of rising, advancing, descending, and retreating, and a station bar, and the molded product taken out from one press by the forks that move upward and forward. of,
As the fork descends, it is received by the station bar, and another fork rises to scoop up the molded product from the station bar, and then moves forward and transfers it to the other press side.

Therefore, in this device, the vertical movement of the upper mold of the press and the rectangular movement of the fork are not linked, but are performed independently, and when discharging and feeding the molded product, the upper mold of the press Once stopped at top dead center for a predetermined time,
In this state, the molded product is discharged and supplied, and then the press is started again to perform press processing, which takes a long time, and the press is frequently switched between stopping and starting. Therefore, there was a problem in that the clutch and brake were prone to failure, the power consumption was large, and there was also a problem in terms of safety.

The present invention aims to solve these conventional problems.

[Means to solve the problem]

In order to achieve the above-mentioned object, the workpiece supply/discharge device according to the present invention transfers the workpieces received by the receiving pieces of the feed bar during the horizontal feed operation of the feed bar to the upper and lower molds of the press machine. Transfer between mold parts,
The work transferred between the mold parts is lowered by the downward movement of the feed bar and supplied to the mold part of the lower mold, and the workpiece transferred to the mold part of the lower mold is lowered by the upward movement of the feed bar. A workpiece supply/discharge device for lifting a workpiece; the feed bar, which is capable of horizontal feeding operation and horizontal pullback movement by a feed bar transfer means, is supported by a support member, and the support member is The lower elastic member attached to the mold and elastically biased upward is held in a mounted state, and the upper elastic member has a larger elastic force than the lower elastic member. A press-down body that is elastically biased downward is attached to the upper mold, and when the support member is lowered by a predetermined amount from the free state, the support member contacts and restricts the lowering of the support member. A regulating member is attached near the lower elastic member, and when the upper mold is lowered, the pressing body pushes down the support member against the elastic force of the lower elastic member, and the feed bar is pushed down. is caused to perform a descending operation, and the feed bar that is descending after supplying the work is pulled back and horizontally operated by the feed bar transfer means, and the upper mold is raised,
The push-down body is separated from the support member and the feed bar is caused to move upward by the elastic force of the lower elastic member, and during the upward movement, the processed workpiece is transferred to the lower die. The work is lifted from the mold section and the next work to be processed is lifted from a support bar disposed near the feed bar.

[Effect]

After placing the workpiece on the feed bar, move the feed bar horizontally to align the workpiece between the mold parts of the upper and lower molds, and then lower the upper mold.
The push-down body descends, the support member is pushed down, and the feed bar is operated to descend. At this time, the workpiece placed on the feed bar is placed on the mold part of the lower mold, so that the workpiece is pressed. Also, during press processing after the workpiece is placed on the mold section,
The feed bar can be pulled back, and if the upper mold is raised again after press working, the feed bar will move upward, and during this time, the pressed workpiece and the support bar are supported. It is possible to lift the workpiece before processing. In addition, by moving the feed bar horizontally after lifting the workpiece, the processed workpiece can be ejected from between the mold parts of the upper and lower molds, and the next workpiece can be fed between the mold parts. can do.

Therefore, by repeating the above-described operations, it is possible to sequentially press workpieces without stopping the press machine, and to sequentially release the processed workpieces.

〔Example〕

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

Figures 1 to 4 are diagrams showing the operations in order, and 1 is a press machine for performing draw, trim, cut, form, pierce, separate, bend, and other various press processes. hand,
2 is an upper mold, and 3 is a lower mold. The upper mold 2 has a mold part 2a and a plate part 2b, and the lower mold 3 also has a mold part 3a and a plate part 3b. Reference numeral 4 indicates a workpiece, which is directly subjected to any of the above-mentioned press workings in the mold parts 2a and 3a.

Reference numeral 5 designates a feed bar that draws a rectangular locus of movement when viewed from the side, in order to load a plurality of works 4 at a predetermined pitch and feed them to the mold section 3a of the lower mold 3. For example, the feed bar 5 has a cross-shaped (lattice-like) shape when viewed from above, and work receiving pieces 6 are protruded from the vertical beams. That is, the mold part 3a is interposed between the longitudinal girders, and the end of the workpiece protruding from the mold part 3a in a direction substantially perpendicular to the feeding direction is received by the receiving pieces 6. Further, the feed bar 5 is supported by a support member 8 and is capable of horizontal movements A and C by a feed bar transfer means (not shown) consisting of a cylinder mechanism or the like. And this support member 8
is held in a mounted manner by a lower elastic member 7 attached to the lower mold 3 and elastically biased upward. Therefore, the feed bar 5 is capable of ascending operation D and descending operation B.

That is, although detailed illustrations are omitted, a receiving groove 9 having a ball-type receiving mechanism or the like is provided in the supporting member 8, and a feed bar 5 is supported as a rest from above in this receiving groove 9 so as to be capable of horizontal operation A and C. There is. Since the support member 8 itself is attached via the lower resilient member 7, the lowering operation B and the raising operation D can be performed freely.

By the way, the push-down body 11 is attached to the upper mold 2 via the upper resilient member 10 which is strong enough, and the resilient force of this resilient member 10 is always equal to the lower resilient member 7 in any state. It is set larger than the firing force. In addition, a support member 8 is provided near the lower elastic member 7.
A regulating member 12 is attached to which the support member 8 contacts when the support member 8 is lowered by a predetermined amount from the free state to restrict the lowering of the support member 8. In other words, the pressing body 1
When the support member 8 is pressed down at step 1, only the weak lower elastic member 7 at the lower side is compressed, and only after the support member 8 comes into contact with the upper end of the regulating member 12 is the strong upper elastic member located above compressed. 10 begins to be compressed. In addition, in the illustrated example, the regulating member 12 is
It consists of a cylindrical body that is fitted onto the lower elastic member 7 and fixed to the lower mold 3.

To explain this in more detail, if the workpiece 4 is sent to the mold parts 2a and 3a by horizontal movement A of the feed bar 5 via the feed bar transfer means as shown in FIG. 2a descends like arrow H,
As shown in FIG. 2, first, the pusher 11 pushes down the support member 8, and then the feed bar 5 and the workpiece 4 are lowered to supply the workpiece 4 to the lower mold part 3a. When the upper mold 2 is further lowered, the support member 8 comes into contact with the regulating member 12, and only the upper mold 2 can be lowered to perform press working without lowering the feed bar 5.

Also, before and after the state shown in Fig. 3 (that is, before and after press working), it is possible to pull back the feed bar 5 in the direction of arrow C, so the feed bar 5 can be fed by the feed bar transfer means as shown in Figs. 3 and 4. The bar 5 can be actuated back. After that, when the upper mold part 2a rises and the support member 8 separates from the regulating member 12, the feeding bar 5 is
performs a lifting operation D, and the next workpiece 4 before processing and the workpiece 4 after processing, which are supported by a support bar (not shown) disposed near the feed bar 5, are lifted up. Next, as shown in FIG. 5 to FIG. 1, the feed bar 5 is horizontally moved A in the feeding direction by the feed bar transfer means to transfer the next workpiece 4 between the mold parts 2a and 3a, and The workpiece 4 after processing is released to the left in the figure. Note that the processed workpiece 4 released to the left is taken out from the feed bar 5 manually or by a robot or the like.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Conventionally, it was thought that it was impossible to reliably and quickly perform the horizontal pull-back operation C while the press machine 1 was performing press work. However, in the present invention, while the press machine 1 is performing press work, the time for pulling back the feed bar 5 and performing horizontal operation C can be secured, so the feed bar 5 can be smoothly pulled back to the original state. As a result, the workpiece 4 is continuously discharged and fed while the feed bar 5 draws a rectangular motion trajectory (as viewed from the side), and the press machine 1 is temporarily stopped at the top dead center. It is now possible to perform press working while constantly reciprocating up and down without any movement.

Therefore, working time can be significantly shortened, and there is no need to frequently switch between stopping and starting, which significantly reduces the occurrence of failures in clutches, brakes, etc., and reduces power consumption. Alternatively, a drive motor with low horsepower may be sufficient.

Further, the mechanism for causing the rectangular movement of the feed bar is simple, and the entire device does not become complicated or large, and can be provided at low cost.

[Brief explanation of drawings]

1 to 5 are simplified side views showing an embodiment of the present invention and for explaining the operating sequence. 1...Press machine, 2...Upper mold, 2a, 3a
...Mold section, 3...Lower mold, 4...Workpiece, 5...
...Feed bar, 6... Work receiving piece, 7... Lower resilient member, 8... Support member, 10... Upper resilient member, 1
1...Pushing body, 12...Restricting member, A, C...Horizontal operation, B...Downward operation, D...Upward operation.

Claims (1)

[Scope of Claims] 1. In the horizontal feeding operation A of the feeding bar 5, the workpiece 4 received by the receiving piece 6 of the feeding bar 5 is transferred to the mold parts 2a of the upper and lower molds 2 and 3 of the press machine 1. 3a, and the workpiece 4 transferred between the mold parts 2a and 3a is lowered by the lowering operation B of the feed bar 5 and supplied to the mold part 3a of the lower mold 3,
The mold part 3 of the lower mold 3 is moved by the upward movement D of the feed bar 5.
A workpiece supply/discharge device for lifting the workpiece 4 of a, the above-mentioned feed bar 5 capable of horizontal feed operation A and horizontal pullback operation C by the feed bar transfer means.
is supported by a support member 8, and the support member 8 is held in a mounted state by a lower elastic member 7 attached to the lower mold 3 and elastically biased upward, and is elastically biased. A push-down body 11 is attached to the upper mold 2 and is elastically biased downward by an upper elastic member 10 whose force is larger than the elastic force of the lower elastic member 7. A regulating member 12 is attached near the lower springing member 7 to prevent the supporting member 8 from descending by contacting the supporting member 8 when the supporting member 8 is lowered by a predetermined amount from the free state. Due to the lowering, the pushing body 11 pushes down the support member 8 against the elastic force of the lower elastic member 7, causing the feed bar 5 to perform the lowering operation B, and also during the lowering after supplying the workpiece. The feed bar 5 is caused to perform a horizontal pull-back operation C by the feed bar transfer means, and the upper mold 2 is raised to separate the push-down body 11 from the support member 8 and release the lower resilient member 7. Even with the elastic force, the feed bar 5 is caused to perform the upward movement D, and the upward movement D is
During the process, the workpiece 4 after processing is lifted from the mold part 3a of the lower mold 3, and the next workpiece 4 before processing is lifted.
A device for supplying and discharging a workpiece to a press machine, characterized in that it is configured to be lifted from a support bar disposed near the feed bar 5.