JPS638857B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a drawing method in a press and a mold thereof. In the punching and drawing process, a blank is punched out from a plate material, and then in the same process,
It is a type of composite type processing that involves drawing. Conventionally, in this type of processing, as shown in FIG.
A drawing punch 5, a blank holder 7, and an outer diameter punching die 6 are provided, and facing these, an outer diameter punch and drawing die 3 and a product knockout 4 are mounted on a lower mold 2 fixedly installed on the bolster 8 of the press. was established. When the drawing process is performed using this device, the product 13 is drawn into the outer diameter punch/drawing die 3.
The product 13 is extruded from the outer diameter punch/drawing die 3 by the product knockout 4, and is then blown away using air, hooked onto the material, and taken out using the feed motion of the material, etc. However, in any case, these methods cannot be said to be stable means for removing the product without damaging the product. The present invention has been made to solve the above problems. Hereinafter, an embodiment of the present invention will be explained in detail based on the drawings. In FIG. 1, an upper die 14 is fixed to a slide 27 of the press, and a lower die 15 is fixed to a bolster 21 on a bed 28 of the press. An outer diameter punch/drawing die 16 is fixed to the upper die 14, and a product knockout 17 is provided therein so as to be movable up and down. The product knockout 17 is constructed to be operated by pressure fluid supplied in synchronization with the press. The drawing punch 18 is provided on the lower die 15 so as to face the outer diameter punch/drawing die 16 and the product knockout 17. The blank holder 20 is provided on the outer periphery of the drawing punch 18 so as to be movable up and down. The blank holder 20 is connected to the cushion pad 23 of the dictation via the cushion pin 22.
The structure is such that it is biased upward by. The outer diameter cutting die 19 is attached to the lower die 15 and the blank holder 2
It is fixedly installed along the outer periphery of 0. The part along this outer periphery is the cutting edge. The insert plate 24 is embedded in the bolster 21 and has holes for the cushion pins 22. The product take-out chute 25 is provided to extend over the upper part of the lower mold in order to guide the product. When performing multi-row drawing and drawing processing to improve material yield, each mold is

If arranged as shown in [Formula] (where a is the radius of the punched blank 30 and t is the width),

[Formula], and θ=30°. That is, the width (t) of each part is the same regardless of the value of a. In other words, in order to make the width of each part the same, the molds should be arranged at 30 degrees. Therefore, in FIG. 3, when the insert plate 24 is provided at 30 degrees and products with different blank diameters are handled, it is sufficient to replace it with another insert plate with matching cushion pin hole positions.
The effect will be explained below. In FIG. 1, as the slide descends, the plate material 29 is punched by the outer diameter punching die 19 and the outer diameter punching/drawing die 16, and the punched blank is then passed through the drawing punch 18 and the outer diameter punching die 16. Product 2 that has been drawn by the diameter punch/drawing die 16 and squeezed into the outer diameter punch/drawing die 16
It becomes 6. As the slide 27 rises, when the outer diameter punch/drawing die 16 comes above the outer diameter punch die 19, the plate material 19 is fed one pitch, and immediately after that, pressure fluid is supplied to the upper mold 14, The product knockout 17 is an outer diameter punch and drawing die 16.
Push out the product 26 inside. The product 26 falls onto the plate 29. Thereafter, the product is guided by air or the like on the plate material 29 by the product take-out chute 25, and is moved and taken out. Since the present invention has the above-described configuration, the product can be moved on the board and reliably taken out in a stable posture.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing the mold structure. The left half shows the state in which the slide is raised, the right half shows the state in which the slide descends, and Figure 2 shows the slide descending and the drawing process completed, and the product is placed in the upper mold. Figure 3 shows the state in which the product is knocked out from the upper mold and dropped onto the plate after being fed one pitch from the state shown in Figure 2. 4 is a top view of the insert plate part, and FIG. 5 is a vertical cross-sectional view showing the conventional mold structure. 1 is an upper mold, 2 is a lower mold, 3 is an outer diameter punch and drawing die, and 4 is a Product knockout, 5 is drawing punch, 6 is outer diameter punching die, 7 is blank holder, 8
is a bolster, 9 is a cushion pin, 10 is a cushion pad, 11 is a slide, 12 is a plate material, 13
is the product, 14 is the upper mold, 15 is the lower mold, 16 is the outer diameter punch and drawing die, 17 is the product knockout,
18 is a drawing punch, 19 is an outer diameter punching die, 20 is a blank holder, 21 is a bolster, 22 is a cushion pin, 23 is a cushion pad, 24 is an insert plate, 25 is a product ejection chute, 26
27 is the product, 27 is the slide, 28 is the bed, 29 is the plate material, and 30 is the blank.

Claims (1)

[Claims] 1. A drawing punch 18 and a blank holder 20 provided on its outer periphery so as to be movable up and down and biased upward.
and a lower mold 15 having an outer diameter punching die 19 having a cutting edge along the outer periphery of the blank holder 20;
An outer diameter punch/drawing die 16 facing the drawing punch 18 and an outer diameter punching die 19 and a drawing punch 1
In a multi-row punching die, a plurality of sets include an upper die 14 having a product knockout 17 that is slidably slidable on the inner diameter of an outer diameter punch/drawing die 16 and is biased downward. , the upper mold 14 and the lower mold 1 of each set are arranged side by side at a required interval in a direction forming 30 degrees with the feed direction of the plate material 29 in order from one side of the plate material 29.
5 and a product take-out chute 25 provided from the upper side of each lower die 15 toward the other side of the plate material 29, and the product after processing is knocked out onto the plate material 29 fed one pitch to the chute 25. A drawing die that is characterized by being removed along the line.