CN2096429U - Punch pre-press type demoulding device - Google Patents

Abstract

The utility model relates to a punch press pre-compaction formula shedder especially combines punch press drawing of patterns stripping pin part and a thrust production component, and this thrust production component locates the bottom position in the punch press slider, and thrust production component can comprise spring, vapour pressure, oil pressure or nitrogen spring, makes the stripping pin have a pre-compaction thrust. When the slide block is pushed to the lower dead point, the stripping pin presses the workpiece firstly, then the workpiece is punched, after the punch forming, the slide block moves upwards through the lower dead point, then the workpiece is pushed downwards by the stripping pin, and when the slide block rises to the upper dead point, the workpiece is separated from the upper die and positioned on the lower die. The device can prevent the workpiece from being damaged due to random falling after processing, and is favorable for matching with automatic stamping operation.

Description

The utility model relates to a pre-pressing type demoulding device for a punching machine, which is mainly provided with a thrust generating element at the inner bottom of the sliding block of the punching machine, which can make the stripping pin have a restoring thrust, so that the punching processing material can be used for pre-pressing positioning and fixed-point ejecting. It can prevent workpiece damage and provide automatic continuous operation.

Existing general punching press jacking structure, mostly as shown in Figure 4, the punch bed 1 is provided with a lower die 11, and a processing material 12 is placed above the lower die 11, and corresponding to the lower die 11 and the upper part of the processing material 12, a The bottom of the slider 2 is set on the upper mold 13 and can be used for pressing down. On the slider 2, a demoulding and ejecting device is provided. 1. A top material cross bar 15 located at the top of the stripping material 14 is formed with retaining rods 17 and 18 fixed on both sides of the bed 1 and fixed with holders 16. The retaining rod 17 can correspond to the positions at both ends of the ejector cross bar 15, In the state where the slide block 2 is not pressed down in Fig. 4A, since the slide block 2 rises to the top dead center position, the ejector bar 15 is stopped by the stop bars 17 and 18 on both sides of the bed 1 and moves downward. Move, so that the stripping pin 14 is in the state of ejection; when the slider 2 moves down to do the stamping action, the ejection bar 15 is no longer blocked by the stop rods 17 and 18, so that the stripping pin 14 is in a free state , as shown in Figure 4B, when the slider 2 moves to the bottom dead center position, it is in a retracted state due to the extrusion of the processing material 12, and as shown in Figure 4C, after the slider rises, the stamped processing material 12 due to adsorption As a result, the upper mold 13 rises together. When the slider 2 rises and returns to the top dead center position, as shown in FIG. Push out downwards and make processing material 12 be pushed down and come off. The above is the basic stamping action and demoulding steps of the existing punch press. The above punch press has the following disadvantages:

1. After demoulding, the processing material cannot be positioned: since the stripping pin is mainly used to push out downward during demoulding, the processing material falls in a free fall manner, which not only causes the processing material 12 to fall and collide as shown in Figure 4D The mold 11 causes damage to the surface of the processing material, which affects the processing quality, and in view of the fact that without any safety protection, the processing material may fall in an irregular way and endanger the operation safety.

2. Unable to do automatic continuous processing: Since the ejection of the processed material is free-falling, it is impossible to ensure that the falling position of the processed material is consistent, and it is not convenient to take it out with manipulators, suction cups or grippers to cooperate with other automatic processing procedures.

The main purpose of this utility model is to provide a safe demoulding device for the control and use of punching machines, which can effectively reduce the damage of processing materials, make the punching quality better, and the processing materials can be positioned on the lower die after punching, which can be convenient Provide follow-up automatic processing operations to improve the practicability of the punching machine.

The utility model is realized in such a way that a thrust generating element that can make the stripping pin have downward pressure elasticity is arranged inside the slide block of the punch press, and a stripping pin that penetrates the bottom plate of the slider is connected to the bottom end of the thrust generating element, so that the stripping pin It has a push back force, and the thrust generating element is a space located at the bottom of the slider, a spring chamber can be formed in the space, a spring is arranged in the spring chamber, the bottom of the spring is against a piston, and the piston is connected with the stripping pin Connection, the stripping pin can be pressed down by the elastic thrust of the spring, so that the processed material can be stripped from the original stamping position of the lower die.

Compared with the prior art, the utility model can improve the finished product rate of stamping parts, is beneficial to cooperate with automatic operation and ensure operation safety.

In order to further illustrate the structural features and practical purposes of the present utility model, the following in conjunction with the accompanying drawings will be described in detail:

Figure 1: Schematic diagram of the cross-sectional structure of the slider of the utility model.

Figure 2: Schematic diagram of the stamping action of the utility model.

Figure 3: A schematic cross-sectional view of an embodiment of the thrust generating element of the present invention.

Figure 4: Schematic diagram of the existing punch press action.

Fig. 1 is an embodiment of the utility model using a spring as a thrust generating element. The utility model is mainly provided with a thrust generating element 30 on the inner side of the bottom plate 36 of the slider 3. The thrust generating element 30 is composed of a spring chamber 32, a spring 31 located in the spring chamber 32, a piston 33 located at the bottom of the spring 31 and a The stripping pin 34 is connected to the piston 33 and protrudes from the vent hole 35 of the bottom plate 36. The spring 31 has an elastic recovery effect, so that the stripping pin 34 has a push back thrust.

When it is actually used on a punching machine, as shown in Figure 2A, when the slider 3 is at the top dead center, the stripping pin 34 is pressed down by the internal spring 31 of the slider 3, and is exposed at the bottom of the upper die 13. When the slide block 3 is gradually pressed down, the material to be processed 12 is pre-pressed and positioned by the force of the stripping pin 34, which has the characteristic of properly positioning the material to be processed before stamping; as shown in Figure 2B As shown, when the slider 3 is pressed down to the bottom dead center position, the force of the lower mold 11 corresponding to the stripping pin 34 is greater than the force of the spring 31, so the stripping pin 34 is retracted into the inside of the upper mold 13, and when the slider 3 When it starts to rise, because the force of pressing the stripping pin 34 disappears at this time, the stripping pin 34 is pushed out again under the recovery elasticity of the spring 31, so that the stamped processing material 12 is pressed and positioned on the lower die 11, The processed material is demolded directly, and after the slider 3 rises to the top dead center, under the action of the stripping pin 34, the processed material 12 is surely positioned on the lower mold 11, which is beneficial to the automatic machinery for subsequent operations.

The utility model can use oil pressure, air pressure or nitrogen to form a thrust source. Figure 3 is a schematic diagram of the thrust generating element of the invention, which is composed of oil pressure, air pressure or nitrogen spring. An air cylinder 42 is formed at the inner bottom of the slider 4, a piston 43 connected to the stripping pin 44, and a vent hole 51 for the stripping pin 44 to pass through the bottom plate 41, and an air and oil inlet and outlet are provided on the top edge of the air cylinder 42. The port 50, the port 50 can be connected to the external single-circuit air, oil pressure or nitrogen supply mechanism by the pipeline; a leak-proof ring 45 is set on the piston 43 to provide a sealing effect; when the gas, oil or nitrogen enters the air cylinder 42, the piston 43 is pushed down to make the stripper pin 44 push out, and when the piston 43 is pushed down, the air at the bottom of the piston 43 is discharged through the vent hole 51 of the base plate 41 . When the slide block 4 is punched downward, after the stripping pin 44 is resisted by the processing material, the piston 43 produces an upward displacement corresponding to the air cylinder 42. At this time, the air, oil or nitrogen of the air cylinder 42 is released from the port. 50 flows out into the supply mechanism; when the stamping is completed, the slide block 4 rises, and the force of the piston 43 decreases, so that the gas, oil or nitrogen pressure enters through the port 50 again, and the stripping pin 44 is pushed out again. Similarly, the thrust generating element in the present invention can also be composed of other equivalent thrust generating devices.

Claims (3)

1, a kind of punch press prepressing type stripper apparatus, it is characterized in that: establish in the slider of punch and adorn a thrust producing component, connecting a material that takes off that runs through the slide block base plate in thrust producing component bottom sells, and this thrust producing component is one to be positioned at the space of slide block inner bottom part position, can form spring housing in this space, establish in the spring housing with a spring, the spring bottom abuts against a piston, and piston then is connected with the described material pin that takes off.

2, punch press prepressing type stripper apparatus as claimed in claim 1 is characterized in that, slider bottom is provided with for taking off expects what pin ran through, the hole that outside air is passed through.

3, punch press prepressing type stripper apparatus as claimed in claim 1 is characterized in that, the thrust producing component can be made of oil pressure, air pressure or nitrogen spring.

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