JPS583733A - Press die structure - Google Patents

Abstract

PURPOSE:To easily perform pierce-working, by providing an arm provided with a punch on its tip part, so as to be rockable, on a die having a die set, driving the arm by a rocking means, and constituting so that press-working is performed by the punch and the die. CONSTITUTION:An arm 25 having the center of rocking on a extrusion L of a working surface 32 of a panel 47 being a work is turned in the direction as indicated with an arror A when the first inclined surface 43 of a drive cam 42 press-contacts with a roller 28 of the arm 25 and moves, rotating, as an upper die 41 descends. When the upper die 41 further continues its descending, the second inclined surface 44 of the drive cam 42 press-contacts with an inclined slide surface 27 of the arm 25, a projecting strip 45 is guided by a guide groove 29, the arm 25 is further turned, and by a pierce punch 31 and a button die 22 provided on the arm 25, pierce-working is performed at a prescribed place on the inclined surface of the panel 47.

Description

[Detailed description of the invention] This invention relates to a press mold structure.

For example, there is a conventional press type structure for making holes (pierces) in the inclined surface of a workpiece, as shown in FIG. That is, (1) is a workpiece placement part formed on the lower die (2), and a button die (3) is attached to this workpiece placement part (1). (4) is a slide cam that is slidably supported on the lower die (2) by the wear plate (5) and the give plate (6), and is capable of moving toward and away from the workpiece mounting portion (1). This slide cam (4) has a contact surface (4a) formed therein for contact with a drive cam, which will be described later. (The force is a compression spring, which urges the slide cam (4) in the direction away from the workpiece placement part (1). (8) is driven up and down by a drive device (not shown), and the lower mold (2) (9) is fixed to the upper mold (8) and comes into contact with the contact surface (4a) of the slide cam (4) as the upper mold (8) descends. This is a drive cam having a wear plate (9a) that drives the drive cam.

Therefore, the slide cam (4) driven by the drive cam (9) slides on the wear plate (5) toward the workpiece placement part (1) against the repulsive force of the compression spring (7). The workpiece mounting section (11
Pierce the workpiece aυ placed on the .

However, in such a conventional press type structure, press processing is performed by sliding the slide cam, so
The device becomes large and the design becomes very difficult, especially if the inside of the mold is complicated or if there is no space.

Furthermore, since the press die structure is complicated, there is a problem that the production cost and the number of production steps increase.

This invention was made by focusing on such conventional problems, and a mold having a die is provided with an arm having a punch at its tip so as to be swingable, and the arm is driven by a swinging means to punch the punch. The purpose of the present invention is to solve the above-mentioned problems by creating a press mold structure in which pressing is performed using a die and a die.

The present invention will be explained below based on the drawings.

FIGS. 2 and 3 are diagrams showing an embodiment of the present invention. First, to explain the configuration, Qυ is a lower die formed by a workpiece mounting portion @ having a button die (c). This lower mold Q
An abbreviated arm (to) is swingably attached to the bracket (to) fixed on υ by means of a pin (a) K. One end of this arm (c) has an inclined sliding surface (5)
It is formed into a step-like shape with a roller attached to the shoulder of one step. Further, the inclined slide surface (5) is provided with a guide groove (c) having a V-shaped cross section as shown in FIG.

A punch retainer (7) is attached to the side of one end of the arm (c).
) is fixed, and this punch retainer (to) K is attached with a piercing punch 6υ that cooperates with the button die (221) to pierce the workpiece. The center of the pin (A), that is, the center of swing of the arm (C), is configured to be located approximately on the extended line (mouth (tangent line with infinite radius) of the machined surface of the button/die (C). This prevents the piercing punch (31) from digging into the button die @ when piercing the workpiece. (C) and (B) are platen) C24)
is fixed to the lower mold Qυ with the two ends in between, and the arm (C) comes into contact with the front end (C) and rear end (3) of the other end of the arm (C).
C) is a stop plate that defines the swing range. 1
3η is an elastic body such as urethane rubber which is attached to the lower die Qυ in order to push the arm (C) back to the non-operating position shown by the imaginary line in FIG. 2 after press working. On the other hand, (4υ is an upper mold that is driven up and down by a drive device (not shown) and moves toward and away from the lower mold Cυ, and (421 is a drive cam as a driving means attached to the upper mold (4N). .This drive cam (42 is the first inclined surface (4
3 and a second slope (44J), and a second slope (44J).
41 is formed with a protrusion (451) having a V-shaped cross section that can fit with the guide #I@ of the arm (C).

Note that (4e is a pad attached to the upper mold 0υ.

Next, the effect will be explained.

Workpiece placement part c! A panel (4η
is placed, and the upper mold (4υ) is lowered.At this time, the arm (C) is in a non-operating rest position where the other end rear end (to) is in contact with the stop plate.The upper mold (41 ), the pad (4119 presses and fixes the panel 0η to the workpiece placement part (c).) Next, the first inclined surface (43 of the descending drive cam (44)
), and while rotating this, the arm (c) is rotated in the direction of the arrow in FIG. 2. As the upper mold 0υ further descends while rotating the arm (C), the drive cam (4) now comes into contact with the inclined slide surface of the arm (C) on the second slope (44), and the above-mentioned The protrusion Ω4 fits into the guide groove (to). When the upper die Cυ further descends, the arm (toward) comes into sliding contact with the drive cam (second inclined surface 04 of 4B) at the inclined slide surface, and the elastic body (
It rotates while compressing the elastic body 07) against a repulsive force of 3η, and is accurately guided by the engagement between the guide groove (C) and the protrusion (451), and is then punched with a button die (H) using a piercing punch 6N. ) to pierce the earrings at the designated locations on the inclined surface of the nokunel (4η). Immediately after finishing piercing the four earrings, the upper die (4υ reaches the bottom dead center and the arm ( The front end (C) of the other end of (C) comes into contact with the stop plate (C). As a result, the arm (C) is restricted from further rotation in the direction of the arrow and stops. Next, the upper mold (4I ) When the drive cam (421) rises, the arm (C) is pushed back by the repulsive force of the elastic body 67 and rotates in the direction of the arrow (Bl) to return to the initial non-operating rest position.

Note that a lever may be used instead of using the drive cam (421) as the driving means for swinging the arm (C) as described above. An example thereof is shown in FIG.
1) is an arm configured similarly to the arm (c) of the above embodiment except that it does not have an inclined sliding surface or rollers, etc. at the upper end, and 5 is an arm that is provided on the lower mold (to) (approx. It is a bar that forms a lever using a point as a fulcrum.

64), whose lower end is one end of the bar ■ t5? ) and whose upper end is rotatably connected to the upper mold 551. This rod 64) is guided by a guide member (not shown) as the upper mold 551 moves up and down, and moves up and down. move. 2 is a rod whose lower end is rotatably connected to the other end 58 of the bar 62, and whose upper end is rotatably connected to the lower end of the arm t5υ. The configuration of other parts is the same as that of the previous embodiment except that no elastic body is provided. Then, when the upper mold 551 is lowered, the rod 54) pushes down the bar (one end i!1I7 of 52).

As a result, the other end of the bar 5 pushes up the lower end of the arm 6υ which is in the non-operating position via the rod (4), and rotates the arm 6υ in the direction of arrow (J) to perform piercing. Let's do it. When the piercing process is completed and the five upper dies are raised, the bar 62 moves in the opposite direction to that described above, rotating the arm 6υ in the direction of arrow (6) and returning it to the non-operating rest position.

With such a drive structure, the drive cam can be set at a different position, making the design of the mold easier. Note that in addition to the above, it is also possible to use an actuator as a swinging means for swinging the arm.

As explained above, according to the present invention, the configuration includes a mold having a die, the swinging center of which is swingably attached to the die, and whose swing center is located approximately on a tangent to the press working surface of the die; Since it has an arm having a punch that performs press working in cooperation with the die, and a drive means that swings the arm, it is different from the conventional press type that presses a workpiece by sliding a slide cam. There is no need to provide a wear plate, a give plate, and a compression spring to allow the slide cam to slide accurately, and the structure can be made simpler and smaller, making it easier to design the mold. This effect can be obtained.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view of a conventional press die structure, Fig. 2 is a partially sectional front view of an embodiment of the press die structure according to the present invention, and Fig. 3 is a sectional view taken along the ■-■ arrow in Fig. 2. FIG. 4 is a schematic front view showing a modification of the swinging means for driving the arm of the press type structure according to the present invention. Qυ...lower die, (c)...die, c! Tsu...Arm, C1υ...Punch, C321...Die machining surface, (4I)...Upper mold, (421...Drive cam (holder driving means), (U...Die machining surface) tangent to the machined surface.

Claims (1)

[Claims] A mold having a die, and an arm having a punch that is swingably attached to the mold, the center of swing of which is located substantially on a tangent to the pressing surface of the die, and that performs pressing in cooperation with the die. and a drive means for swinging the arm.