JPH0428657Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a press die that uses the movement of a cam to perform plastic working such as piercing on a workpiece.

(Prior art) To perform various plastic processing such as piercing and bending on a workpiece by utilizing the vertical movement of the upper mold and converting this movement into horizontal or diagonal movement. The press type is also called a cam type, and there is a conventional press type as shown in Japanese Utility Model Application No. 60-28922.

In such press dies, a drive cam is usually fixed to the upper die, and a slide cam, which is driven by contact with the drive cam, is movably attached to the lower die. teeth,
A die is provided in the lower die, and a piercing punch that works together with the die is attached to the slide cam. Therefore, when the upper mold is lowered toward the lower mold, the drive cam comes into contact with the slide cam, the slide cam moves, and a hole is punched in the workpiece using the piercing punch and die.

(Problem to be solved by the invention) However, in press processing using such conventional press dies, it is useful when processing a large number of workpieces into the same shape; It is not possible to process workpieces with multiple shapes as is.

For example, when performing edge bending and piercing on the edge of a workpiece at the same time using the same press die, the press die of the workpiece to be subjected to these processes and the workpiece to be subjected to only edge bending may be exchanged. In the past, it was impossible to do anything without doing so. In particular, when performing transfer press or progressive processing (progressive die), workpieces are sequentially conveyed to a large number of press dies for processing.
In processing in a particular press die, obtaining a workpiece that has been subjected to a predetermined process and a workpiece that has not been subjected to the predetermined process requires a major modification of the entire apparatus, which is not easy.

The present invention has been made in view of the problems of the prior art described above, and is designed to obtain workpieces that have been processed in a predetermined manner and workpieces that have not been processed using the same press die that utilizes a cam mechanism. The purpose is to

(Means for Solving the Problems) The present invention for achieving the above object includes installing an upper mold movable up and down toward the lower mold above the lower mold supporting the workpiece, and A slide cam, which is provided with a first processing section that processes a workpiece and a second processing section that plastically processes the workpiece in cooperation with the first processing section, is movably moved in a substantially horizontal direction to the upper die. A drive cam that is attached to one of the lower molds and that contacts and drives the slide cam when the upper mold approaches the lower mold is placed at a position where it contacts the slide cam and a separated position where it does not contact the slide cam. The press mold is characterized in that the slide cam is slidably attached to the other of the upper mold and the lower mold, and the slide cam can be made inoperative when the upper mold approaches the lower mold.

(Function) If the drive cam is set to a position where it contacts the slide cam, when the upper die approaches the lower die, the second processing section provided on the slide cam and the first processing section provided on the lower die The workpiece is subjected to predetermined plastic working in cooperation with the processing section. On the contrary,
By setting the drive cam to a separated position where it does not come into contact with the slide cam, even if the upper mold approaches the lower mold, the workpiece will not be processed by each of the processing sections. This results in 1
Multiple types of products can be processed using the press die.

(Example) Hereinafter, a description will be given based on an example of the present invention shown in the drawings.

1 and 2 are front sectional views showing a press die according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along the - line in FIG. 1.

Above the lower mold 1, an upper mold 2 is driven by a ram (not shown) and is movable up and down. The lower die 1 is provided with a die 3 as a first processing section for drilling a hole in the workpiece W placed thereon. A slide cam 4 is mounted on the upper mold 1 so as to be movable in a substantially horizontal direction, guided by a support block 3 shown in FIG. 3 fixed to the lower surface of the upper mold 1.
is installed. Note that a wear plate 5 is interposed between the slide cam 4 and the upper die 1.

In order to apply elastic force to the slide cam 4 toward the left in FIGS. 1 and 2, a bolt 8 is passed through a hole 7 in a block 6 fixed to the upper mold 2 and fastened to the slide cam 4. A compression coil spring 10 is installed between the block 6 and a receiver 9 attached to the tip of the bolt 8. The lower surface of the slide cam 4 is formed in a V-shape, and on one side of this lower surface, a piercing punch 11 for punching a hole in the workpiece W in cooperation with the die 3 is located in a second processing section. It is installed as. During this drilling process, a pad 12 is fitted to the outside of the piercing punch 11 so as to be slidable in the axial direction of the piercing punch 11 in order to press the workpiece W, and this pad 12 applies elastic force to the workpiece W. In order to apply the flange part 13 of the piercing punch 11
A compression coil spring 14 is installed between the pad 12 and the pad 12. The forward movement limit of this pad 12 is fixed to the flange portion 13, and the forward movement limit of the pad 12 is
This is done by means of a bolt 15 that engages with.

When the upper mold 2 approaches or moves downward toward the lower mold 1, a drive cam 17 for driving the slide cam 4 comes into contact with an inclined surface 16 formed on the lower surface of the slide cam 4. installed on. This drive cam 17 is movable in a substantially horizontal direction and in a direction substantially perpendicular to the moving direction of the slide cam 4, that is, in the left and right directions in FIG. The A position of the drive cam 17 in FIG.
is the position where the drive cam 17 comes into contact with the slide cam 4, and position B indicates a separated position where the drive cam 17 does not come into contact with the slide cam 4. A limit switch 18 is attached to the lower die 1 to detect this contact position A, and a limit switch 18 is attached to the lower die 1 to detect the separation position B.
A limit switch 19 is installed.

In order to move this drive cam 17, as shown in FIG. It is connected to 17. Pressurized fluid is supplied to the cylinder 17 from a fluid source (not shown) through a hose 22. Incidentally, reference numeral 23 in the figure indicates a wear plate fixed to the drive cam 17, and this wear plate 23 slides on the inclined surface 16 of the slide cam 4.

Next, a procedure for plastic working the workpiece W using the press mold of the present invention having the above-described structure will be described.

In order to drill a hole in this workpiece W by the cooperation of the piercing punch 11 and the die 3, the workpiece W is inserted into the die 3 with the upper die 2 sufficiently separated from the lower die 1. Cylinder 2
0, the drive cam 17 is set at the contact position A as shown by the solid line in FIG. In this state, when a ram (not shown) is driven to move the upper mold 2 downward toward the lower mold 1, the inclined surface 16 of the slide cam 4 comes into contact with the wear plate 23 of the drive cam 17, and the slide cam 4 In Figure 1, it descends while moving to the left. As a result, the workpiece W is held between the pad 12 and the die 3, and the die 3 and the piercing punch 11 work together to form a hole. When the upper mold 2 is raised after this drilling process is completed, the slide cam 4 is returned to the right by the elastic force of the spring 10.

If the drilling process is not to be performed on the workpiece W, the cylinder 20 is driven to move the drive cam 17 to the separation position B in FIG. When the upper mold 2 is lowered in this state, the lower mold 1 moves the upper mold 2 to the lowermost position as shown in FIG.
Even if the slide cam 4 approaches the drive cam 17, the piercing punch 11
In some cases, the workpiece W is not drilled. As a result, the slide cam 4 becomes inactive.

In the above embodiment, the slide cam 4 is attached to the upper die 2 and the drive cam 17 is attached to the lower die 1, but as shown in the above-mentioned conventional publication, the drive cam 17 is attached to the upper die 2. , slide cam 4
may be attached to the lower mold 1. In addition, in the illustrated embodiment, the workpiece W in the press die is
Although only the portion to be drilled is shown, the upper die 2 and the lower die 1 may be used to perform plastic working such as bending at the same time as the drilling.

[Effects of the invention] As described above, according to the invention, the slide cam is provided with a second processing section that performs plastic working such as drilling in cooperation with the first processing section, and the slide cam is The drive cam, which is driven by the approach movement of the upper mold to the lower mold, is moved to a position where it is in contact with the slide cam and a separated position where it is not in contact with the slide cam. It has become possible to perform two types of processing using the same press die: one in which plastic working is performed in the working part, and one in which plastic working is not performed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a press die according to an embodiment of the present invention in a state where the drive cam is in the contact position, and FIG. FIG. 3 is a cross-sectional view showing the press mold, taken along the - line in FIG. 1. 1... Lower die, 2... Upper die, 3... Die (first processing section), 4... Slide cam, 11... Piercing punch (second processing section), 17... Drive cam, 2
0...Cylinder.

Claims (1)

[Scope of utility model registration request] An upper mold is installed above the lower mold that supports the work so that it can move up and down toward the lower mold, and the lower mold is provided with a first processing section that processes the work, and by cooperating with the first processing section, A slide cam provided with a second processing section for plastically working the workpiece is attached to one of the upper mold and the lower mold so as to be movable in a substantially horizontal direction, and is used when the upper mold approaches the lower mold. a drive cam that contacts the slide cam and drives the slide cam;
The slide cam is slidably attached to the other of the upper mold and the lower mold at a position where it contacts the slide cam and a separated position where it does not come into contact with the slide cam, and when the upper mold approaches the lower mold, the slide cam is moved. A press mold characterized in that it can be made inoperative.