JPH06184Y2 - Workpiece positioning structure in press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Use The present invention relates to a press machine used for sheet metal working, and more particularly to a work positioning structure used for a die having a cam mechanism of a transfer press.

b. Conventional Technology Conventionally, when a sheet metal working part, for example, an automobile bonnet panel is processed using a mold having a cam mechanism such as a transfer press, a positioning cage as shown in FIG. 4 is used. ing.

That is, a is a lower die of the press, b is a work (bonnet panel), c is a positioning gauge for setting the work b at a predetermined position of the lower die a, d is a cam slide, e
Is a processing blade provided on the cam slide d, and the positioning gauge c is held by a holding part f on a part of the lower die a as shown in the drawing. Prior to processing, the workpiece b moves onto the member (die) g on the lower die a, and the positioning gauge c
Is set to the processing position by. At that position, the upper die (not shown) descends to hold the work b by both upper and lower dies, and the cam slide d moves so that the edge of the work b is machined by the machining blade e.

c. Problem to be Solved by the Invention In the conventional device, the holding portion f of the positioning gauge c is long as illustrated. Therefore, the strength is insufficient and the workpiece vibrates, so that positioning of the work b is not reliable and a set error occurs. If the strength of the holding portion f is strengthened in order to prevent this, there is a problem inevitably increasing the size and increasing the size of the press die.

d. Means for Solving the Problems The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work positioning structure in a press machine that solves the above problems.

That is, the present invention is a press machine for holding a work between upper and lower molds and processing the work by moving a cam slide arranged on the lower mold, which is provided with an elongated hole for guiding on the cam slide. A plate is provided, and a holder for a positioning gauge that is configured to engage with the plate and move relative to the plate is provided. Further, the holder is provided with an engagement hole that always overlaps with the long hole of the plate. A work positioning structure in a press machine characterized in that pins engaging with the engaging holes and the elongated holes of the plate are provided so as to protrude from the lower portion of the upper mold.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3, 1 is an upper die of a press, 2 is a lower die, 3 is a cam slide that reciprocates on the lower die 2 in the direction of arrow B, and 4 is a positioning gauge. The gauge 4 is fixed to the holder 6 via the holding portion 5.

The holder 6 is movably arranged on a substantially L-shaped plate 7 fixed on the cam slide 3. That is, the plate 7 is provided with a pair of guide bars 7a on both sides thereof as shown in FIG. 3, and the guide bars 7a are slidably inserted into and fixed to the holding portions 6a provided on both wings of the holder 6, respectively. Further, the guide bar 7a is provided with a spring 10 and a stopper 7b. Further, the plate 7 is provided with a long hole 7c having arcuate ends, which is formed substantially at the center thereof.

The holder 6 penetrates through an engaging hole 6b, and the engaging hole 6b is arranged on the long hole 7c on the plate 7 so that it is always present when moving, and is provided on the lower surface of the upper mold 1 so as to project. The pin 11 is constructed so that it can be inserted.

Reference numeral 15 is a processing blade provided at the tip of the cam slide 3, 20 is a work (bonnet panel), and 22 is a positioning gauge for the side portion of the work 20, which is erected at a predetermined position on the lower mold 2 at an appropriate interval. There is.

It should be noted that a series of constituent members from the positioning gauge 4, the holding portion 5, and the holder 6 to the plate 7 are provided in plural sets as needed as shown in FIG.

e. Action First, the work 20 is moved from the direction shown by the arrow A in FIG.
And the lower die 2, and is set on the die of the lower die 2 as shown in FIG.

Next, the upper die 1 descends, and the pins 11 protruding from the lower portion of the upper die 1
Is inserted into the engaging hole 6b on the holder 6 as shown in FIG. Therefore, the relationship between the upper mold 1 and the lower mold 2, and the relationship between these molds and the holder 6, the holding portion 5, and the positioning gauge 4 are fixed.

Next, when the cam slide 3 moves in the direction of arrow B from the position shown by the chain double-dashed line in FIG. 2 for machining, the holder 6 and the pin 11 are fixed to each other, but the cam slide 3 together with the plate 7 Move with the pin 11 inserted into the slot 7c. Then, the tip portion of the work 20 is processed at the position shown by the solid line in FIG. FIG. 3 shows this state, in which the spring 10 is compressed and the engagement hole 6
(That is, the pin 11) reaches the leftmost position of the long hole 7c.

When the machining is completed, the cam slide 3 retracts, and 2 in FIG.
After returning to the state shown by the dotted chain line, the upper die 1 is raised and the processed work 20 is taken out, whereby one step of processing the work 20 is completed.

After that, the above steps may be repeated.

f. Effect of the Invention According to the work positioning structure according to the present invention, since the work positioning gauge is mounted on the cam slide rather than over the cam slide as in the past, the work positioning gauge is retained. The part can be shortened. Therefore, the strength can be easily obtained, and the workpiece can be positioned reliably without vibration. Therefore, it is possible to prevent a work set error, which has often occurred in the past, and eliminate defective loss.

Further, since the size can be reduced, the size of the mold itself can be reduced, and the mold cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a press machine, which is provided with a work positioning structure according to the present invention, omits an upper mold and shows an outline thereof,
The drawing is a partial cross-sectional explanatory view showing a part of the positioning gauge of the same structure in a longitudinal section, FIG. 3 is a plan explanatory view showing the upper die removed in a view taken in the direction of arrow D of FIG. 2, and FIG. It is explanatory drawing corresponding to FIG. 1 ... upper mold, 2 ... lower mold, 3 ... cam slide, 4 ... positioning gauge, 6 ... holder, 6b ... engaging hole, 7 ... plate, 7c ... oblong hole, 11 ... pin, 20 ... work.

Claims (1)

[Scope of utility model registration request] 1. A press machine for holding a work between upper and lower molds and processing the work by moving a cam slide arranged on the lower mold, wherein a long hole for guiding is provided on the cam slide. A plate is provided, and a holder for a positioning gauge that is configured to engage with the plate and move relative to the plate is provided. Further, the holder is provided with an engagement hole that always overlaps with the long hole of the plate. A work positioning structure in a press machine, characterized in that pins engaging with the engaging holes and the elongated holes of the plate are provided so as to protrude from the lower part of the upper die.