JP2534351B2 - Press equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a press device for forming a blank material into a predetermined shape, and in particular, a press provided with a stock wiper for preventing lateral displacement of the blank material during pressing. It relates to the device.

[Prior Art] As a conventional press device of this type, there is, for example, one shown in FIGS. 3 and 4. In the figure, reference numeral 1 is a lower die as a fixed die, reference numeral 2 is an upper die as a movable die, and the blank material 3 is processed into a predetermined shape by the cooperation of these die 1 and 2.

Further, the stock wiper 4 is fixed to the side surface 2a of the upper die 2, and at the time of pressing, the contact surface 4a of the stock wiper 4 is brought into contact with the end surface 3a of the blank material 3 so that the blank material 3 The lateral displacement is prevented so that a predetermined shape is formed.

An example of this type of structure is that described on page 125 of "Automotive Engineering Complete Book, Vol. 19: Manufacturing Method of Cars" issued by Sankaido Co., Ltd.

[Problems to be Solved by the Invention] However, in such a conventional pressing apparatus, the stock wiper 4 for preventing the lateral displacement of the blank material 3 is used.
Since the contact surface 4a of the blank member 3 is a vertical surface, as shown by the chain double-dashed line in FIG. Although the contact surface 4a comes into contact and the lateral displacement is regulated, as shown by the solid line in the figure by press working, when the end edge portion 3b of this blank material 3 is bent, the end surface 3a contacts the stock wiper. Contact surface 4a
Since it is separated from the stock wiper 4, the function of the stock wiper 4 cannot be exerted, and the blank material 3 becomes
Lateral misalignment may occur, and a predetermined product may not be obtained.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and in a press device for forming a blank material into a predetermined shape by cooperation of a movable die and a fixed die, One of the two molds is provided with a stock wiper that abuts the end surface of the blank material at the time of plus to prevent lateral displacement of the blank material,
An abutting surface that abuts the blank material end surface of the stock wiper is formed along a movement path along which the blank material end surface moves during the pressing, and the blank material end surface slides on the corresponding contact surface during pressing. The feature is that it is a set press machine.

[Operation] According to such means, when the blank material is formed into a predetermined shape by both molds, the contact surface of the stock wiper is formed along the movement trajectory of the end surface of the blank material. Even if the end edge of the blank material is bent as shown in, the end surface of this blank material slides and contacts the contact surface of the stock wiper until just before the completion of molding, and The horizontal deviation of the blank material can be prevented, and a highly accurate product can be obtained.

[Examples] Hereinafter, the present invention will be described based on Examples.

1 and 2 are views showing an embodiment of the present invention.

First, the configuration will be described. In the figure, reference numeral 11 is a lower mold as a fixed mold, reference numeral 12 is an upper mold as a movable mold, and in this lower mold 11, a die 11b having a recess 11a is provided, and also in the upper mold 12. Is its recess 11
A convex punch 12a to be inserted into a is provided. The blank material 13 is processed into a predetermined shape by the cooperation of the two molds 11 and 12.

Then, on the side surface portion 12b of the upper mold 12, the blank material 13
A stock wiper 14 is fixed to prevent the lateral displacement of the. Specifically, the stock wiper 14 has an upper portion 14a fixed to the side surface portion 12b of the upper die 12 and a lower portion 14b extending toward the lower die 11 side. A contact surface 14c with which the end surface 13a of the blank material 13 contacts is formed in the lower portion 14b. The shape of the contact surface 14c is a shape along the trajectory of the blank material end surface 13a when the blank material 13 is pressed, and the blank material end surface 13a slides on the contact surface 14c during pressing. Is set. In this embodiment, the punch 12a of the upper die 12 is formed in an arc shape centering on the corner 12c.

Next, the operation of the pressing device having such a configuration will be described.

With the blank material 13 set on the lower mold 11, the end surface 13a of the blank material 13 is brought into contact with the stock wiper contact surface 14c as shown by the chain double-dashed line in FIG. To lower. It should be noted that FIG. 2 is drawn as if the lower mold 11 is raised for easy understanding of the explanation. Then, the punch 12a of the upper die 12 is inserted into the recess 11a of the lower die 12, and the edge portion 13b of the blank material 13 is bent (second
(See dashed line in the figure). At this time, the edge portion 13 of the blank material 13
b is bent around a corner 12c of the punch 12a, and the end surface 13a of the blank material 13 has an abutting surface 14c of a stock wiper 14.
Further, the contact state is maintained by sliding until just before the end of molding, and the end surface 13a is separated from the contact surface 14c in the state shown in the two-dot chain line in the figure. In this position, blank material 13
Hardly causes horizontal displacement. Therefore, unlike the conventional case, the blank material end surface 13a does not separate from the stock wiper contact surface 14c during the molding, lateral displacement can be prevented, and a highly accurate product can be obtained.

Although the stock wiper 14 is provided on the upper mold 12 in the above embodiment, it is not limited to this and may be provided on the lower mold 11 side.

[Effects of the Invention] As described above, according to the present invention, the contact surface that abuts the blank material end surface of the stock wiper is moved along the movement trajectory of the blank material end surface during pressing, and the contact surface during pressing. By setting the end surface of the blank material to slide on the top, the stock wiper contact surface can be brought into contact with the end surface of the blank material over the entire press forming process. Since horizontal displacement can be prevented, a highly accurate product can be obtained, and because the stock wiper has a "contact surface" set so that the blank material end surface slides, its mounting position is movable. Alternatively, it can be easily set by either the fixed type or the fixed type, which has a practically useful effect of being unaffected by the moving direction of the end face of the blank material.

[Brief description of drawings]

FIGS. 1 and 2 are views showing an embodiment of the pressing apparatus according to the present invention, and FIG. 1 is a sectional view of a main part of the pressing apparatus, and FIG.
FIG. 3 is a sectional view showing the operation of the press machine, FIGS. 3 and 4 are views showing a conventional example, FIG. 3 is a sectional view of the press machine, and FIG. 4 is an enlarged view of part A of FIG. FIG. 11 …… Lower mold (fixed type) 12 …… Upper mold (movable type) 13 …… Blank material 13a …… End surface 14 …… Stock wiper 14a …… Abutting surface

Claims (1)

(57) [Claims] 1. A press device for forming a blank material into a predetermined shape by the cooperation of a movable die and a fixed die, wherein one end of the both die is brought into contact with an end surface of the blank material to press the blank material. A stock wiper for preventing lateral displacement of the stock wiper is formed, a contact surface that abuts the blank material end surface of the stock wiper is formed along the movement trajectory of the blank material end surface during the pressing, and during the pressing. A press device characterized in that the blank material end surface is set to slide on the contact surface.