JPH10166081A - Transfer feeder for multistage press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable metallic dies to be transported in the order of processing by controlling a servo motor so as to make a pair of feed bars freely carry out advance and return operations, subjecting equipment and a work to press working in the order of working processes, and thereby forming a die line with less eccentric load of sliding. SOLUTION: The finger 4C, 4C of a feed bar 3, 3, return-operating by a transfer pitch and standing-by, clamps at a first processing position N1 a work 6A with the first process completed, advancing a length twice as long as the transfer pitch after lifting, transporting to a third processing position N3, imparting a down operation as well as an unclamping operation to the work, and supplying it to a metallic die 2B. The finger 4B, 4B gives a clamping operation at the third processing position N3 to the work 6B with the second process completed, return-operating by the transfer pitch after lifting, reversely transporting to the second processing position N2, imparting the down operation as well as the unclamping operation to the work, and supplying it to a metallic die 2C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of arranging processing steps set in a processing work on a press machine in a positional relationship so as to suppress an eccentric load of a slide, and conveying the processing steps one by one in a processing order. It relates to a transfer feeder that can perform the transfer. In particular, it is a transfer feeder that can easily cope with the processing of a large variety of small products.

[0002]

2. Description of the Related Art A transfer feeder according to the prior art is known in which a work is conveyed sequentially to a die arranged in a press in a processing order.

[0003]

The transfer feeder in the above-described conventional technique is transported and processed in the processing order regardless of the load in each processing step.
An eccentric load naturally acts on the slide, and in order to solve this, a method of changing the design of the mold and equalizing the load in each step is adopted. Therefore, a lot of cost and man-hours were required for manufacturing the mold.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, to arrange a large load step as a central step, and to arrange other steps as appropriate to form a mold row with a small eccentric load of a slide. To provide a transfer feeder that can be transported in the processing order.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a multi-step press machine having three ends at both ends of a mold row.
A two-dimensional servo transfer unit is provided between which a pair of feed bars extending along both sides of the mold row and having fingers corresponding to each processing step are connected. The three-dimensional servo transfer unit is provided with three axes for independently applying clamp / unclamp, lift-down, and advance / return operations to a pair of feed bars, and a servo motor for driving each of the three axes. By controlling these servo motors, a pair of feed bars can freely perform advance and return operations,
The material and the workpiece are pressed in the processing step sequence.

[0006] Since a pair of feed bars can freely convey the work in advance and return operations, there is no need to arrange the mold rows in the machining order, and a mold row is used to reduce the eccentric load of the slide. Press working can be performed in the working order.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
Shown in As shown in FIG. 1, this embodiment shows a case where the number of processing steps is three. In the three steps, the third processing step has a large load, the first processing step and the second processing step are small,
In addition, it is assumed that there is no large load difference, and the third processing step is set to the processing position N2 at the center of the mold row.

In FIG. 1, three processing positions N1, N2, and N3 are provided on a bolster 1 of a press machine, and a die 2A corresponding to a first processing step, a second processing step, and a third processing step is provided at the positions. , 2B and 2C are changed to the third
The dies 2C in the processing step are arranged in the order of 2A, 2C and 2B so as to be at the center position of a slide (not shown). The feed bars 3 and 3 have fingers 4A, 4B and 4C corresponding to the molds 2A, 2B and 2C, extend along the mold rows, and have three-dimensional servo transfer units 5A at both ends.
5B.

A three-dimensional servo transfer unit 5A,
5B incorporates three axes (not shown) for driving the clamp bars / unclamps, lift-down and advance / return operations by synchronizing the feed bars 3 and 3 and an NC servo motor connected to each axis. .

According to the order of FIG. 1 (a) to FIG. 1 (f),
Material 6 and work 6A by feed bars 3 and 3
6B will be described. In FIG. 1 (a), the fingers 6A and 4A of the feed bars 3 and 3 which stand by waiting for the material 6 fed into the material input position P to return to the material input position P by the transport pitch in the direction opposite to the transport direction. Clamp. Subsequently, the feed bars 3 and 3 that have been lifted advance in the transport direction by the transport pitch, and the material 6
Is transported to the first processing position N1 as shown in FIG. 1B, and is supplied to the mold 2A by performing a down operation and an unclamping operation. Here, a slide of a press machine (not shown) is lowered and raised to perform the first processing step, and the raw material 6 is processed into the processed work 6A. Meanwhile, feed bar 3,
No. 3 performs a return operation by the transport pitch.

The fingers 4C and 4C of the feed bars 3 and 3 which have been waiting for the return operation by the transport pitch move the processed workpiece 6A having completed the first processing step at the first processing position N1 in FIG. As described above, after the clamp operation and the lift operation are performed, the advance operation is performed for the transport length (2) twice as long as the transport pitch, and the transport is performed to the third processing position N3 as shown in FIG. It operates and unclamps to supply it to the mold 2B. Here, the slide of the press machine is lowered and raised once to perform the second processing step,
The processing work 6A is processed into the processing work 6B. In the meantime, the feed bars 3 and 3 perform the return operation by the transport pitch.

The fingers 4B, 4B of the feed bars 3, 3, which have been waiting for the return operation by the transport pitch, move the processed workpiece 6B, which has completed the second processing step, at the third processing position N3 as shown in FIG. As shown in Fig. 1, after the clamp operation, lift operation, return operation by the transport pitch
As shown in (f), the sheet is conveyed backward to the second processing position N2, down-operated, unclamped, and supplied to the mold 2C. Here, the slide of the press machine is lowered and raised once to perform the third processing step.
After that, it is taken out to the product take-out position Q by another carrying-out device (not shown).

Subsequently, the fingers 4A, 4A of the feed bars 3, 3, which have been waiting by the unclamping operation, perform a clamping operation on the second material 6 inserted into the material input position P, and repeat the above. One product 7 is produced for every three vertical movements of the slide.

As described above, the transport and the reverse transport can be freely performed by controlling the independent three-axis servo motors of the three-dimensional servo transfer unit. In this embodiment, the number of processing steps is three, but it is apparent that the present invention can be applied to other multiple processing steps. Also, the servo motor in this embodiment uses an NC servo motor for accurate control of the transfer position.
It is not limited to this.

FIG. 2 is a view showing a state in which the material 6 and the workpieces 6A and 6A are transferred from the first processing step to the respective dies 2A, 2B and 2C in the third processing step.
7 shows operation patterns of fingers 4A, 4B, and 4C of feed bars 3 and 3 when B is carried in. FIG. 2 (a)
Shows clamp, lift, advance (conveyance length:), down and unclamping operations when the finger 4A of the feed bar 3 on one side conveys the material 6 from the material input position P to the first processing position N1. .

FIG. 2B shows a clamp, a lift, and an advance (transport length: 2) performed when the fingers 4C of the feed bar 3 transport the workpiece 6A from the first processing position N1 to the third processing position N3. , Down, unclamping and return (transport length:) are shown.

FIG. 2C shows clamps, lifts, returns (transport length:) when the fingers 4B of the feed bar 3 reversely transport the workpiece 6B from the third processing position N3 to the second processing position N2. The down and unclamping operations are shown.

[0018]

As is apparent from the above description, according to the present invention, there is provided a press machine having a die row in a multi-processing step,
The workpiece can be transported freely even if the die row is not in the processing order but in an arbitrary arrangement, so the arrangement with the least eccentric load of the slide can be selected, and the die for processing a variety of small-lot production products There are effects such as easy design and process layout. Further, the cost and man-hour for manufacturing the mold can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a transfeeder showing a feed bar conveyance mode according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the operation of a finger of a feeder that conveys a material and a work to each processing position.

[Explanation of symbols]

1 is a bolster, 2A, 2B and 2C are molds, 3 is a feed bar, 4A, 4B and 4C are fingers, 5A and 5B are three-dimensional servo transfer units, 6 is a material, 6A and 6B
Is a workpiece, 7 is a product, P is a material input position, N1 is a first processing position, N2 is a second processing position, N3 is a third processing position, Q is a product removal position, and is a transport pitch.

Claims (1)

[Claims] 1. A three-dimensional servo transfer unit is provided at both ends of a multi-step press machine, and a pair of feed bars extending along both sides of a mold row and having fingers corresponding to each descending step are connected therebetween. The three-dimensional servo transfer unit has three axes for independently applying clamp / unclamp, lift-down, and advance return operations to a pair of feed bars, and a servo motor for driving each of the three axes. In a transfer feeder of a multi-step press machine equipped with a dies, by controlling these servo motors, a pair of feed bars can freely perform transport and reverse transport operations. By changing the order of the mounting positions of the dies, the material and processed workpiece can be Multi-step press machine transfer feeder, characterized in that to press working and conveyed to the order.