JPS636292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer press mold device for drilling holes or the like on the slope of a workpiece.

A typical conventional example is shown in FIG. 2 and will be explained. A cam body 5 in which a punch 3, which is biased in the opposite direction to the cutting edge by a compression spring 10, is slidably embedded therein is mounted to be slidable up and down using cam guides 7 and 8 as guides by the operation of the ram of the press. Compression spring 1
It is urged downward by 5a. Also, a bucking block 6 is fixed to the upper die holder 1 and receives back pressure from the punch 3 during punching. The die butt 4 is embedded in the die holder 9.
Like the cam body 5, the lift plate 11 is urged upward by a compression spring 15b, and positions the workpiece A at the height of the feed line when the molds are not engaged. Note that the force relationship between the compression springs 15a and 15b is 15a>15b.

To explain the outline of the operation in the above configuration,
When the workpiece A is conveyed from the previous process by the finger device and the ram of the press is lowered, the workpiece A is positioned by a pilot (not shown) fixed to the upper mold. Next, the compression spring 15a overcomes the force of the compression spring 15b and pushes the workpiece A down via the cam body 5 from the height of the feed line to the processing position. When the ram further descends and reaches just before the bottom dead center, the cam body 5 comes into contact with the lower die via the lift plate 11 and bucking plate 12, and the cam body overcomes the force of the compression spring 15a and slides upward. . At this time, the punch 3 is pushed down to the lower left along the slope of the bucking block 6 to punch the hole.

The outline of conventional molds has been explained above, but in these methods, the dimensions of many component parts such as the cam body 5, bucking block 6, cam guides 7 and 8, dive bush 4, lift plate 11, bucking plate 12, etc. Since the shapes are related to each other, machining errors for each part accumulate, and since a certain amount of clearance is required for the punch 3 and the cam body 5 to slide, the engagement between the punch 3 and the die thread 4 becomes unstable, making assembly difficult. The disadvantages were that adjustments were difficult, the blades often galled, increasing repair costs, and the molds were expensive as many parts required high precision.

The present invention was developed in order to eliminate the drawbacks of the conventional molds described above. By tilting the workpiece and pressing the processed part in a horizontal state, it is possible to achieve high precision, easy assembly and adjustment, and low cost. The purpose is to provide transfer press molds.

The structure of the present invention will be described above with reference to one embodiment shown in FIGS. 3 to 5. The upper mold holder 1 is arranged vertically opposite to the lower mold holder 2, and is moved in the vertical direction by a press. The base of the punch 18 disposed in the upper die holder 1 is buried by a punch plate 23 so as not to fall off.
A punching plate 22 is provided on the bottom surface of the punching plate 8 to receive back pressure during punching. The workpiece holder 24b is fixed to a stripper 24a, and a stripper post 25 implanted in the stripper 24a passes through a stripper guide bush 26 press-fitted into the upper mold holder 1 and moves in the vertical direction. It is slidable. The stripper 24a is always urged downward by a compression spring 32c installed between the upper mold holder 1 and the stripper 24a, and the tip of the punch 18 I'm giving guidance. A pair of cam rods 2 on both sides of workpiece A
7 is arranged and fixed to the upper mold holder 1. A pair of pilot pins 37 disposed on both sides of the workpiece A pass through the stripper 24a and are guided by the stripper 24a to slide up and down. Furthermore, a compression spring (not shown) is inserted into the mounting hole drilled in the upper mold holder 1.
The pilot pin 37 attached through the holder is vertically slidable and telescopic, and is always urged downward. The die butt 19 is embedded in the die holder 20. This die holder 20 is fixed to the lower die holder 2, has a guide portion 20a for the workpiece A, and has support pins 29 attached thereto and protrudes from both sides. The movable plate 21, which is pivotally supported by the support pin 29, is provided with cylindrical cam followers 28 that protrude from both sides of the movable plate 21, which are connected to the cam rod 27.
When the upper mold holder 1 is lowered by engaging with the cam rod 2
When the mold holder 7 is lowered, the movable plate 21 is pushed down by the cam rod 27 and rotates counterclockwise, and the upper mold holder 1 is raised and the cam follower 28 and the cam rod 2 are lowered.
7 is disengaged, the movable plate 21 is moved by a pair of spring holders 31a and 31b containing a compression spring 32a whose both ends are pivotally supported by support pins 30a and 30b, respectively. is rotated clockwise, and the compression spring 3 is attached to the stopper 33 fixed to the lower die holder 2.
2a, they are constantly urged into contact. The movable plate 21 is also provided with two pairs of pilot pins 35a and 35b at the other end of the support pin 29 for positioning the workpiece A. The pilot pins 35a, 35b are always urged upward by the compression spring 32b and protrude, but at the uppermost end they abut against the stopper 33 and sink into the movable plate 21. Therefore, when this contact occurs, the movable plate 21
The upper surfaces of the stopper 33 and the stopper 33 are at the same height. The positions of the upper die holder and the lower die holder 2 are determined by fitting a cylindrical guide post 38 implanted in the upper die holder 1 into a guide bush 39 fixed to the lower die holder 2.

Next, the operation of the transfer press mold apparatus of the present invention constructed as described above will be explained. When the workpiece A is transported from the mold device 50 in the previous step by a finger device (not shown) and placed on the upper surface of the movable plate 21, the ram of the press is lowered. First, the workpiece A is sandwiched and positioned by the tapered ends of the pair of pilot pins 37 in the feeding direction. At the same time, the inclined surface of the cam rod 27 that descends comes into contact with the cam follower 28 attached to the movable plate 21 and overcomes the force of the compression spring 32a.
The movable plate 21 is pushed down and rotated counterclockwise using the support pin 29 as a fulcrum. At this time, a pair of pilot pins 35 provided on the movable plate 21
Since b is biased by the compression spring 32b,
As the movable plate 21 descends, it is pushed upward to clamp the workpiece A in the feeding direction and accurately position it. When the upper die further descends, the workpiece holder 24b also descends, and the workpiece A is held between the workpiece holder 24b and the workpiece guide portion 20a of the die holder 20, and is pressed in the direction of the pilot 35a. Positioning is performed in the direction perpendicular to the feeding direction.

In this way, the horizontal positioning is completed, and the stripper 2 is moved so that the processing surface of the workpiece A is horizontal.
4a, the workpiece holder 24b, and the workpiece guide portion 20a of the die holder 20, and the hole is punched in this state. When the ram of the press starts to rise, the workpiece A returns to the feed line in the reverse order described above and is transferred to the mold device 5 for the next process by the finger device.
1. At this time, the pilot pins 35a and 35b that have positioned the workpiece A are brought into contact with the stopper 33 and sink into the movable plate 21, so that they do not interfere with the conveyance of the workpiece A.

The same effect can be obtained without changing the gist of the invention, for example, by making the die holder 20 rotatable and tilting it together with the workpiece A instead of rotating the movable plate 21. Further, tapping can also be performed by incorporating a tapping unit 40 into the mold as shown in FIG.

As explained above, in the present invention, a cam rod is installed in the upper mold holder by utilizing the ram operation of the press, and as the upper mold holder descends, this cam rod is rotatably supported by a pin on the die holder. By pushing down the movable plate, the workpiece is tilted and the machining part is held in a horizontal state during machining, making it easy to adjust and assemble the engagement of the upper and lower cutters, while ensuring high accuracy. This eliminates any problems such as galling. In addition, until now it was structurally impossible to do anything other than simple machining such as drilling, engraving, and half punching, but according to the present invention, tapping can be easily performed by incorporating the tapping unit into the mold device. It has excellent features such as:

[Brief explanation of the drawing]

Figure 1a is a plan view of the workpiece, Figure 1b is the first
2 is a sectional view of a conventional mold device, FIG. 3 is a sectional view of the embodiment of the present invention when it is raised, and FIG. 4 is a sectional view of FIG. 3 when it is lowered. 5 is a plan view showing the lower die shown in FIG. 3, FIG. 6 is a sectional view of the tapping unit, and FIG. 7 is an explanatory diagram of the positional relationship of the pilot pins. 1...Upper mold holder, 2...Lower mold holder, 1
8...Ponchi, 19...Dive Tsushiyu, 20...
Die holder, 21...Movable plate, 24a...
...Stripper, 24b...Workpiece holder, 25...
...Stripper guide post, 27...Cam rod, 2
8... Cam follower, 29... Support pin, 30
a, 30b...support pin, 31a, 31b...spring holder, 32a, 32b, 32c...
Compression spring, 33...stopper, 35a, 35b
...Pilot pin, 37...Pilot pin,
38...Guide post, 39...Guide bush.

Claims (1)

[Claims] 1. An upper die holder equipped with an upper cutter, a stripper and a guide post that guide the tip of the upper cutter and are biased downward by a spring, and a lower cutter that faces the upper cutter and the guide post. In a transfer press mold device that continuously processes a plurality of mold devices each consisting of a lower mold holder provided with a guide bush that slides in vertical direction, the lower mold device is fixed to the lower mold holder for at least one mold device. An elastic body is provided between a movable holder whose one end is pivotally supported by the mold cutter and is rotatable, and a lower mold holder that constantly urges the movable holder upward, and an elastic body is provided between the upper mold holder A cam rod having a sloped portion at its tip is installed, and as the upper die holder descends, the sloped portion of the cam rod engages with the cam follower of the movable holder on which the workpiece is placed, and the movable holder is pressed down against the elastic body, and the workpiece is held at an angle by the stripper of the upper mold holder, the workpiece presser provided thereon, and the lower mold cutter to maintain the processing part of the workpiece in a horizontal state. A transfer press mold device characterized in that processing is performed along the operating direction of a ram of a press.