JPS6033833A - Punch press forming machine - Google Patents

Abstract

PURPOSE:To enable punch-formation of a projecting product and a recessed product with one press forming machine by supporting a projecting work provided with a movable punch supported in a lifting device in the recess formed to a lower die from the lower side. CONSTITUTION:A recessed product 2 is supplied to a lower die 7 and after the product 2 is positioned by the inside circumferential edge thereof, an upper die 8 is lowered. An upper knife 9 and a lower knife 6 cut the product 2 while a work holder 11 in the die 8 holds down the outside circumference of the product 2 with the elastic force of springs 10. The die 8 is then risen to discharge the product 2 and a movable punch 16 is risen. A projecting product is placed on the top surface 16 and the punch 15 is risen until the hook 17 of the punch 15 contacts with the stopper 8 of the die 7. The projecting product is positioned as the top surface of the punch 15 contacts with the entire surface of said product and at the same time the outside circumferential edge thereof contacts with the top surface of the die 7. When the die 8 is lowered, the circumferential edge of the projecting product clamped between the die 7 and the holder 11 is exactly cut by the knife 9 and the knife 6.

Description

[Detailed Description of the Invention] Technical Classification/Field> The disclosed technology belongs to the technical field of an apparatus for cutting and forming a plate material or the like by raising and lowering an upper die relative to a lower die.

<Explanation of the gist> According to the present invention, the lower blade of the lower mold supported by a frame is opposed to the upper blade of the upper mold supported by the frame so as to be movable up and down. Support around the workpiece with a presser foot,
This invention relates to a punching press molding machine for cutting, and in particular,
This invention relates to a punching press molding machine in which a movable punch supported by an elevating device is provided in a recess formed in the lower mold, so that a convex workpiece can be supported from below.

Conventional technology: Generally, it is extremely difficult to position a press-formed material such as a plate when supplying it, so the surface of the press-formed material is press-formed in advance, and then the uneven surface of the press-formed product is used for positioning. The outer periphery is punched out.

By the way, as shown in Figures 1 and 2, there are convex products 1 and concave products manufactured by press forming, respectively, for products formed from steel plates such as fuel tanks for automobiles due to their low manufacturing costs. 2 are often joined by seam welding or the like at the outer peripheral portion 3 having the same shape.

With this 1, the above-mentioned convex product 1. When manufacturing all 2 concave products, if the outer peripheries are all cut into the same shape, even though the outer peripheries are the same, they are cut separately using a punching press molding machine that has a mold that matches each shape. Or, by completely replacing only the mold, the mold can be cut using the same punching press molding machine.

<Problems with the prior art> However, the former has the disadvantage that the difference in the outer circumferential shape of the convex product 1 and the old product 2 may occur due to the different punching press molding machines, and that this may cause problems during assembly. However, the latter method had the disadvantage that the work involved, such as exchanging molds, was similar.

In addition, there was also the disadvantage that manufacturing costs increased due to an increase in the number of molds.

<Object of the Invention> The object of the invention is to solve the problems of the punching press molding machine based on the prior art described above, and to solve the problems of the punching press molding machine based on the above-mentioned prior art. Focusing on the fact that the outer circumferential shapes of the two products are the same, the two products can be punched and formed with a single press molding machine with good accuracy and without the need for mold replacement, benefiting the field of material processing in the manufacturing industry. We aim to provide a complete range of excellent punching press forming machines.

<Structure of the Invention> In order to solve the above-mentioned problems, the structure of the present invention, which is the entire gist of the above-mentioned claims in accordance with the above-mentioned object, is to provide a convex product whose surface is shaped into a predetermined shape by press molding etc. and an old product. When cutting the outer periphery of the uncompleted convex product and the old product at predetermined positions in order to assemble them in the next step, 1.
First, when you place the old product on the lower mold supported by the frame,
After the old product has been positioned and expanded along the shape of the lower mold, its periphery is cut by the lower blade of the lower mold and the upper blade of the upper mold that moves up and down along the frame, and then the periphery of the old product is cut by the lower blade of the lower mold and the upper blade of the upper mold that moves up and down along the frame. After placing the convex product on the upper surface of a movable punch that is supported by a lifting device inside the box, the movable punch is raised via the lifting device and the convex product is pressed against a work holder attached to the upper die. After positioning, the upper blade of the upper mold and the lower blade of the lower mold can be used to cut the product into the same outer circumferential shape as the old product.

<Embodiment - Configuration> Next, referring to FIGS. 1 and 2 of an embodiment of the present invention, FIG.
, 4 is as follows.

Reference numeral 3 is a punching press forming machine which is the essence of the present invention, and is placed on a base 4 of a press line in a factory, etc., and the lower part of the frame 5 of the punching press forming machine 3 has an upper edge. A lower mold 7 having a cross-sectional shape with a lower blade 6 attached thereto is provided, and its circumferential edge is formed in the same shape as the outer peripheral shape of the old product 2.

Further, above the lower mold 7, an upper mold 8 having an opening-shaped cross section is supported along the frame 5 so as to be freely raised and lowered via a drive device (not shown), and is opposed to the lower mold 7. An upper blade 9 of the upper mold 8 is attached to the inner peripheral edge of the upper mold 8 so as to be in sliding contact with the outer peripheral edge of the f-blade 6.

Furthermore, inside the upper mold 8, a spring 10 attached to the upper part is provided.
A work holder 11 is supported by the upper mold 8 through the convex product 1, and has a lower surface entirely corresponding to the lower mold 7, which has the same outer peripheral shape as the lower mold 7. It is set at a position where it moves up and down together with the upper mold 8 and comes into contact with the lower mold 7 earlier than the upper mold 8.

A hydraulic cylinder 13 as a lifting device connected to a hydraulic device (not shown) is attached to the four parts 12 formed in the lower mold 7, and the rod 1 of the hydraulic cylinder 13 is connected to a hydraulic device (not shown).
A movable punch 15 is attached to the tip of 4 so as to be movable up and down.

The upper surface 16 of the movable punch 15 has the same shape as the convex product 1 at a position corresponding to the outer peripheral shape of the convex product 1 to be cut, and is configured to position the convex product 1 between it and the work holder 11. It has become.

A hook 1 formed at the bottom of the movable punch 15
The top dead center position of the mold 7 is completely determined by a stopper 18 attached to the recess 12 of the lower mold 7.

<Embodiment - Effect> In the above-mentioned configuration, a predetermined surface is press-formed from a material such as a steel plate by a pre-stage device (not shown), and the convex product 1 and the old product 2 each have an outer peripheral shape shown by a chain line in FIGS. 1 and 2. When cutting, first, the old product 2 is supplied to the lower mold 7 as shown in FIG. When lowered, the work holder 11 in the upper mold 8 presses the entire outer circumference of the old product 2 through the elastic force of the spring 10 between the upper mold 8 and the lower mold 7, and the upper blade 9 and the lower blade 6 release the old product. Cut 2.

Next, after lifting the upper mold 8, the old product 2 is discharged, and the movable punch 15 is raised by a set amount via the hydraulic cylinder 13 via a hydraulic device (not shown), and the upper surface 16 of the movable punch 15 is lifted. After placing the above-mentioned convex product 1 on the vagina movable punch 1
5. Raise the entire punch 15 until the hook 17 contacts the stopper 8 of the lower mold 7 and stop.

Then, as the upper surface of the movable punch 15 comes into contact with the entire surface of the convex product 1, the convex product 1 is positioned and its outer peripheral edge comes into contact with the top surface of the lower mold 7, and in this state, it is lowered into the second mold 8. The periphery of the convex product 1 clamped between the lower m7 and the work holder 11 by the upper blade 9 and the lower blade 6 is accurately cut into the same shape as the periphery of the old product 2 described above in one cycle.

After the upper mold 8 is raised, the entire convex product 1 is ejected and the same operation as described above is repeated.

<Other Examples> It goes without saying that the embodiments of the present invention are not limited to the above-mentioned embodiments. For example, the lifting operation of the upper mold and the lifting operation of the movable punch may be fully linked, The punching press molding machine may be installed in a mixed line that simultaneously handles all 21 types of products, and the workpiece supplied to the punching press molding machine may be a fuel tank of a stove, etc. in various embodiments. can be adopted.

<Effects of the Invention> As described above, according to the present invention, a convex product whose outer circumferential shape is the same even though the surface shape is different, and an old product are manufactured by combining them. In the case of punching, etc., each of the above products can be punched with one punching press molding machine, so the outer circumference of both products can be punched. The excellent effect of being able to precisely manufacture the same shape without errors is achieved.

In addition, since a movable punch supported by an elevating device is provided in the recess of the lower mold supported by the frame, the movable punch can position the convex product relative to the upper mold. In addition to being able to perform positioning, the excellent effect of molding with extremely high precision is achieved by simply positioning the workpiece relative to the mold.

Furthermore, since the number of molds can be reduced and molding can be performed using a single press molding machine, not only is it unnecessary to use two press molding machines as in the past, but production can be carried out smoothly without having to change molds. This makes it possible to achieve an excellent effect of completely improving production efficiency.

In addition, mold costs, mold manufacturing costs, etc. can be reduced, and there is also the advantage that it is possible to reduce product costs due to improved production efficiency.

[Brief explanation of drawings]

Figures 1 and 2 are perspective illustrations of the convex product and the old product, respectively.
, 4 are overall cross-sectional views showing the operating states of the embodiments of the present invention.

Claims (1)

[Claims] In a punching press forming machine, in which the lower blade of the lower mold supported by a frame is opposed to the upper blade force ζ of an upper mold supported on the frame so as to be able to rise and fall freely, and the upper mold is provided with a workpiece holder. A punching press molding machine characterized in that a movable punch facing a workpiece supported by an elevating device is provided in a concave portion of a lower die.