JPH02151327A - Blanking device - Google Patents

Abstract

PURPOSE:To surely discharge a blank from a die by placing the blank blanked by a press machine on a receiving plate immediately before it drops down between the upper die and the lower die, and thereafter, ejecting the blank by a discharge plate. CONSTITUTION:The movement in the vertical direction f QDC (quick die change) die set 2 is converted to the movement in the X1 - X2 direction for feeding a material 16 through a cam 10. When the QCD die set 2 is allowed to ascend in the Y2 direction after die blanking, movable shafts 13, 13 advance in the X2 direction by energizing force of a tension spring 22 and a compression spring 21 and a claw 11 catches the material 16 and feeds it in the X2 direction. The material feed quantum is determined by a moving amount P of the movable frame 13. In the upper part of the QDC die set 2, a blank discharge use knockout mechanism 9 is contained, and a blank is discharged surely from a female die 25. The blank is discharged onto a receiving plate of a discharge unit in a position of the top dead center of the die, a discharge plate is advanced and the blank is projected. In such a way, work space is utilized effectively and labor saving can be executed, and the blank can be discharged surely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a punching device using a press machine, and particularly to a compact and cost-effective punching device suitable for improving the safety and efficiency of punching work. .

(Prior art) Conventionally, when punching a blank from sheet metal using a press machine, each process was performed in one process so that the external shape punching, hole punching, and other processes were completed in one process. A complete cutting die assembled into a mold is often used.

A complete cutting die usually consists of a die set consisting of an upper die and a lower die. As shown in Fig. 8, the automatic punching process using a general die for small-volume production parts is as shown in Fig. 8, where the material is placed on the upper surface of the lower die 23' (a) in the same figure, and the upper die 23 is lowered and punched out (b in the figure). , the blank 24 as well as the upper mold 23 rises while being sandwiched inside the female mold 25 (FIG. C), and at the top dead center, the blank 24 is ejected and is discharged out of the mold by air (FIG. 4D). To eject the punched blank 24 from the mold, it can be blown out using an air ejector linked to a press machine, as shown in Figure 9, or it can be ejected using a piston-shaped extrusion rod using air pressure, as shown in Figure 8. This is done by forcibly ejecting the blank 24 using a screwdriver. Nikkan Kogyo Shimbun, Press Technology, 1986. VO124, 7, P51 citation> (Problem to be solved by the invention) In the above conventional technology, a sensor 40 shown in FIG. 11 is attached to confirm the discharge of the blank 24, but there is a problem in terms of reliability. In addition, it is preferable to consider safety, efficiency, and noise emitted from the air. It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a compact and cost-effective punching device.

(Means for Solving the Problems) The above object is to provide a means for converting the punching direction of a product into a material feeding direction by utilizing the vertical movement of a ram of a press machine, and a means for converting the punching direction of a product into a material feeding direction by using the vertical movement of a ram of a press machine, and A means for feeding the material in fixed quantities, and a receiving plate that moves to the position where the punched product is placed.

A blank ejecting device is provided integrally with the die set, and includes a ejecting plate that pushes out the product after confirming that the product is placed, and a blank ejecting device that controls the movement of the receiving plate and the ejecting plate step by step using an independent drive source. This is achieved by

(Function) With the above configuration, the blank punched by the press is placed on the receiving plate a just before it falls between the upper mold and the lower mold, and then the discharge plate protrudes the blank into the mold. The blank can be reliably ejected from.

(Example) An example of the present invention will be described with reference to the drawings. FIG. 1 shows an overall front view of a punching device according to the present invention, and FIG. 2 shows a side view of the same. The press machine used in the present invention includes a press brake,
Any type of crank press may be used. In both figures,
1 is a material feeding unit, 2 is a QDC (quick die change) die set, 3 is a blank discharge unit, 4 is a press machine equipped with a C-shaped frame, and 5 is a control section. The press 4 includes a ram 4a that continuously moves up and down, and the top dead center of the QDC die set 2 supported by a guide post 6 is regulated by a stopper 7. Press machine 4
The ram 4a, which moves linearly through the drive system, descends in the direction of arrow Y1 and compresses the compression spring 8 of the guide post 6. Then, as the ram 4a moves in the direction of arrow Y, the force direction ram 4a rises, and the compression spring 8 returns to its original state. is configured to do so. Furthermore, a knockout mechanism 9 is provided at the top of the QDC die set 2 for ejecting the punched blank. FIG. 3 shows the timing of each operation from punching to blank discharge due to the movement of the ram.

Next, the material feeding unit will be explained with reference to FIG.

Figures (a) and (b) are state diagrams of the die set 2 at the upper and lower limit positions, and Figure (c) is a detailed view of section A in (a). Vertical direction of QDC die set 2 (Y x
- Y z direction) movement is performed by the cam 1 to feed the material 16.
0 through Xl-X.

is converted into directional motion. Further, the clamp for the material 16 is configured such that the tip of the claw 11 comes into pressure contact with the material 16 in response to changes in the thickness of the material 16, and is transported by the frictional force between the claw 11 and the material 16. . That is, when the QDC die set upper mold is lowered from the state shown in FIG. 4(a), the pair of movable pieces 13.13 are moved by the arrow , and then retreat in the force direction to reach the state shown in FIG. 3(b).

When retracting, the material N16 is fixed by the claws 11'11' of the pair of fixing pieces 14.14, and the material 16 is configured so as not to return in the direction of arrow X□ force opposite to the material supply direction arrow X2. There is. That is, as shown in FIG. 4(c) showing the details of part A in FIG. 4(a), the pawl 11' of the fixed piece 14 acts to prevent the material 16 from moving in the movement in the supply direction X2 direction is not obstructed. Now, after die punching, QDC
When the die set 2 is raised in the direction of arrow Y2, the movable piece 13.13, which had been retreating, moves forward in the direction of arrow The material 16 is sent in the X2 direction due to the frictional resistance between the claw 11 and the material 16. At this time, fixed piece 1'
The material 16 slides between the claw 11' of No. 4 and the material 16, so that the movement of the material 16 is not hindered.

In addition, the shape of the cam 10 is such that if the material is fed while the die 15 is gripping the material in the initial state when the die set 2 is raised, the claws 11 will wear out and feed accuracy will decrease. A vertical portion 10b is provided at , and the movable piece 13 is configured to move after the mold 15 and material 16 are separated. In addition, the material feeding unit has a feed side 1 so that short materials can be used.
9 and a tension side 20, and is integrated with the QDC die set 2 to achieve compactness. As shown in FIG.
or select an appropriate adjustment amount. If the gauge 18 is removed, the maximum value of the movement amount can be selected up to P MAX. The movement of the upper mold 23 and the lower mold 23' and the blank discharge operation follow the procedure shown in FIG. 8, but in the present invention, as shown in FIG. 6, the QDC die set 2
A knockout mechanism 29 for blank ejection is built into the upper part,
Ejection from the female mold 25 was ensured.

In the ejection process, as shown in FIGS. 7(a) and 7(b), the receiving plate 30 of the ejecting unit is advanced at the top dead center position of the mold to ensure ejection onto it. Thereafter, the discharge plate 31 is advanced to eject the blank 24 as shown in FIG. 2(c). The operation of the receiving plate 3o and the discharge plate 31 is performed by a cylinder 32 with an intermediate stop.
The apparatus is made more compact by using one percussion source to stop the movement of the receiving plate 30 and to move the discharge plate 31.

(Effect of the invention) By implementing the present invention, the following effects can be obtained.

(1) The structure is simplified, effective use of work space and compactness are achieved, setup is easy, and labor or manpower can be saved.

(2) Blank discharge is ensured, and there is no noise caused by errors, improving work safety.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of an embodiment of a punching device according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a diagram showing the timing from punching to blank discharge according to the present invention, and FIG.
), (b), and (c) are explanatory diagrams showing the operation of the material feeding unit, FIG. 5 is an explanatory diagram of setting the material feeding amount, and FIG. 6 is a front view showing the blank discharge unit and die set of the present invention.
FIG. 7 is a perspective view showing the ejecting hand 1@ of the blank ejecting unit of the present invention, FIG. 8 is a processing process diagram using a conventional total cutting die, and FIGS. 9 to 11 are views showing a conventional blank ejecting device. . 1... Material feeding unit 2... QDC die set 3... Blank discharge unit 4... Press machine 5... Control section 6... Guide boss 7... Stopper 8... Compression spring
9... Knockout mechanism 10... Cam
11.11'...Claw 12...Cam floor
13...Movable piece 14...Fixed piece 15
...Mold 16...Material 18...Gauge 19...Feeding side 20...Tension side 21
...Compression spring 22...Tension spring 23...
・Upper mold 23'...Lower mold 24...Blank 25...Female mold 26...Male mold
30... Reception plate 31... Discharge plate 32... Cylinder with intermediate stop

Claims (1)

[Claims] 1. In a punching device using a die set attached to a press machine, means for converting a part of the ram driving force of the press machine into material supply feed, and means for feeding the material in a fixed amount in synchronization with the punching cycle; It is equipped with a receiving plate that moves to a position where the punched product is placed, and a discharge plate that pushes out the product after confirming that the product has been placed, and the movement of the receiving plate and the discharge plate is performed in stages by an independent drive source. A punching device characterized in that it is provided with means for controlling.