Blanking die of steel plate for automobile stamping sheet metal part

Abstract

The steel plate blanking die comprises a base, an upper die, a lower die and a material supporting frame, the base is fixed to a workbench, the lower die is installed on the base, the upper die is located above the lower die, the material supporting frame is arranged between the upper die and the lower die and used for supporting a steel plate, the upper die is provided with an upper arc-shaped cutter, the lower die is provided with a lower arc-shaped cutter, and the lower arc-shaped cutter is provided with a lower arc-shaped cutter. A plurality of elastic supporting mechanisms are arranged on the lower die at intervals, the upper die is installed on the elastic supporting mechanisms, when the elastic supporting mechanisms are in an initial state, the upper die and the lower die are in a die splitting state, when the upper die is pressed by a pressing machine to move downwards by a preset distance, the upper die and the lower die are in a die closing state, and a flexible buffering mechanism is arranged on the upper surface of the material supporting frame; the blanking die has the advantages that when the size of a steel plate is changed, the blanking die can be rapidly replaced, the stroke of a press can be shortened, the production takt is improved, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to a blanking die, and more particularly to a blanking die for automotive panels. Background Art

[0002] With the improvement of people's living standards, traveling by car has become increasingly popular, the demand for cars is increasing, and people's requirements for cars are also getting higher and higher. The problems caused by the increasingly rapid replacement of cars are becoming increasingly prominent. Reducing manufacturing costs and improving production efficiency have become the basis for the survival of many automotive parts manufacturers.

[0003] In the production process of automotive stamping sheet metal parts, it is necessary to perform operations such as blanking, drawing, trimming, shaping, and punching on the coil material under the action of the die and the machine tool, and finally form various shaped parts as required. Among them, the blanking process is a production process that cuts the coil steel plate into small steel plates of the required size, usually realized by blanking equipment. The existing blanking equipment is usually an automated device, mainly including a PLC controller, a feeding device, a blanking die, and a discharging device. The feeding device sequentially inputs the coil steel plate to the preset cutting position of the blanking die. The blanking die cuts the steel plate transported to its preset cutting position to obtain small steel plates of the required size. The feeding device outputs the small steel plates to the discharging device, and the discharging device transports the small steel plates transported to it to the stacking place for packing. The PLC controller controls the coordinated work of the feeding device, the blanking die, and the discharging device.

[0004] The existing blanking die mainly includes a base, an upper die, a lower die, and a blank holder. Among them, the base is fixed on the workbench, the lower die is fixed on the base, the upper die is located above the lower die and is fixed on the press, and the blank holder is arranged between the upper die and the lower die to support the steel plate. The upper die has an upper arc-shaped cutter, and the lower die has a lower arc-shaped cutter. When the steel plate is transported to the preset cutting position of the blanking die, the press drives the upper die to descend, so that the upper arc-shaped cutter and the lower arc-shaped cutter cut the steel plate to obtain the steel plate of the required size.

[0005] In order to ensure the smooth feeding of the feeding device and prevent the steel plate from being scratched by the lower arc cutter during transmission, the current material supporting frame is designed to be able to lift. In the initial state, the upper die and the lower die are in the die-separated state, the material supporting frame is flush with the feeding device and the discharging device, the lower arc cutter is located at the internal gap of the material supporting frame and is lower than the material supporting frame. When the feeding device feeds the material at a preset frequency under the control of the PLC controller, each time the PLC controller controls the feeding device to feed the material once, it first controls the material supporting frame to descend a preset distance, so that the lower arc cutter extends from the internal gap of the material supporting frame to above the material supporting frame. Whenever the steel plate is sent to the preset cutting position in the blanking die, the PLC controller controls the press to drive the upper die to descend a preset distance to close with the lower die. At this time, the upper die and the lower die are in the die-closed state, the steel plate is pressed down, and the upper arc cutter and the lower arc cutter cut the steel plate up and down to obtain small steel plates. At this time, the PLC controller first controls the press to drive the upper die to rise a preset distance to separate from the lower die, then controls the material supporting frame to rise a preset distance to separate the steel plate on it from the lower arc cutter, and then controls the feeding device to convey the small steel plates to the discharging device to complete one blanking, and so on in a cycle.

[0006] However, the existing blanking dies have the following problems: First, since the sizes of the steel plates to be cut are not necessarily the same, and the blanking die is only for steel plates of a certain size, when the size of the steel plate is changed, the blanking die also needs to be replaced. However, on the one hand, since the upper die is installed on the press, the technical requirements for the disassembly and assembly personnel are relatively high, and it is difficult to complete the timely replacement of the blanking die; Second, since a moving space for the material supporting frame needs to be reserved between the upper die and the lower die, this results in a longer stroke of the press, a slower production rhythm, and lower efficiency. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a blanking die for steel plates used in automotive stamping sheet metal parts, which can quickly complete the replacement of the blanking die when the size of the steel plate is changed, and can shorten the stroke of the press, improve the production rhythm, and have a higher production efficiency.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: A blanking die for steel plates used in automotive stamping sheet metal parts, including a base, an upper die, a lower die, and a material supporting frame. The base is fixed on the workbench, the lower die is installed on the base, the upper die is located above the lower die, the material supporting frame is arranged between the upper die and the lower die for supporting the steel plate. The upper die is provided with an upper arc cutter, the lower die is provided with a lower arc cutter, and a plurality of elastic support mechanisms are arranged at intervals on the lower die. The upper die is installed on the plurality of elastic support mechanisms. When the elastic support mechanisms are in the initial state, the upper die and the lower die are in the die-separated state. When the upper die is pressed down by the press and moves a preset distance downward, the upper die and the lower die are in the die-closed state. The upper surface of the material supporting frame is provided with a flexible buffer mechanism.

[0009] Compared with the prior art, the advantages of the present invention are as follows: by providing a flexible buffer mechanism on the upper surface of the material supporting rack and a plurality of elastic support mechanisms on the lower die, in the initial state, the upper die and the lower die are in the die-separated state, and the flexible buffer mechanism is higher than the lower arc-shaped cutter. When the steel plate is conveyed to the blanking die, the steel plate directly contacts the flexible buffer mechanism and is supported by the flexible buffer mechanism. Then, the press presses down the upper die. During the downward movement of the upper die, the plurality of elastic support mechanisms are compressed, and the flexible buffer mechanism is also pressed and deformed. When the upper die moves downward to the die-closed state with the lower die, a steel plate cutting is completed. At this time, the press moves upward and resets, and the plurality of elastic support mechanisms rebound and reset to drive the upper die to reset, and the flexible buffer mechanism returns to its original state. At this time, the cut steel plate can be sent out. Thus, the present invention utilizes the deformation characteristics of the flexible buffer mechanism to achieve the contact between the steel plate and the lower arc-shaped cutter during cutting and the separation between the steel plate and the lower arc-shaped cutter during conveying, without the need to additionally control the lifting of the material supporting rack, so there is no need to reserve space for the lifting of the material supporting rack, which can shorten the stroke of the press, improve the production rhythm, and have a relatively high production efficiency. In addition, since the lower die is installed on the upper die, the blanking die can be directly removed integrally from the workbench. Thus, when the size of the steel plate is changed, the replacement of the blanking die can be quickly completed.

[0010] Further, each elastic support mechanism is a nitrogen spring.

[0011] Further, the flexible buffer mechanism includes multiple clusters of bristles distributed on the upper surface of the material supporting rack.

[0012] Further, a plurality of positioning pins are provided on the base, and a plurality of positioning grooves corresponding to and matching the plurality of positioning pins one by one are provided at the bottom of the lower die.

[0013] Further, a guiding mechanism for guiding the steel plate to enter between the upper die and the lower die is also installed on the base, and a flexible buffer mechanism is also provided on the guiding mechanism.

[0014] Further, the guiding mechanism can adjust the guiding width to be applicable to guiding steel plates of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the blanking die for steel plates of automotive stamping sheet metal parts of the present invention;

[0016] Figure 2 is an exploded view of the blanking die for steel plates of automotive stamping sheet metal parts of the present invention;

[0017] Figure 3 is a partial perspective view of the blanking die for steel plates of automotive stamping sheet metal parts of the present invention;

[0018] Figure 4 The bottom view of the lower die of the blanking die for the steel plate of the automotive stamping sheet metal part of the present invention. Specific embodiments

[0019] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0020] Embodiment 1: As Figure 1 and Figure 2 shown, a blanking die for a steel plate of an automotive stamping sheet metal part includes a base 1, an upper die 2, a lower die 3 and a blank holder 4. The base 1 is fixed on the workbench, the lower die 3 is installed on the base 1, the upper die 2 is located above the lower die 3, and the blank holder 4 is arranged between the upper die 2 and the lower die 3 for supporting the steel plate. The upper die 2 has an upper arc-shaped cutter, the lower die 3 has a lower arc-shaped cutter 7, and a plurality of elastic support mechanisms 5 are arranged at intervals on the lower die 3. The upper die 2 is installed on the plurality of elastic support mechanisms 5. When the elastic support mechanisms 5 are in the initial state, the upper die 2 and the lower die 3 are in the die-separated state. When the upper die 2 is pressed down by the press and moves downward a preset distance, the upper die 2 and the lower die 3 are in the die-closed state. The upper surface of the blank holder 4 is provided with a first flexible buffer mechanism 6.

[0021] In this embodiment, by providing the first flexible buffer mechanism 6 on the upper surface of the blank holder 4 and arranging a plurality of elastic support mechanisms 5 on the lower die 3, in the initial state, the upper die 2 and the lower die 3 are in the die-separated state, and the first flexible buffer mechanism 6 is higher than the lower arc-shaped cutter 7. When the steel plate is conveyed to the blanking die, the steel plate directly contacts the first flexible buffer mechanism 6 and is supported by the first flexible buffer mechanism 6. Then, the press presses down the upper die 2. During the downward movement of the upper die 2, the plurality of elastic support mechanisms 5 are compressed, and the first flexible buffer mechanism 6 is also pressed and deformed. When the upper die 2 moves downward to be in the die-closed state with the lower die 3, a steel plate cutting is completed. At this time, the press moves upward and resets, and the plurality of elastic support mechanisms 5 rebound and reset to drive the upper die 2 to reset, and the first flexible buffer mechanism 6 returns to its original state. At this time, the cut steel plate can be sent out. Thus, the present invention utilizes the deformation characteristics of the first flexible buffer mechanism 6 to realize the contact between the steel plate and the lower arc-shaped cutter 7 during cutting and the separation between the steel plate and the lower arc-shaped cutter 7 during conveying, without the need to additionally control the lifting of the blank holder 4, so there is no need to reserve space for the lifting of the blank holder 4, which can shorten the press stroke, improve the production rhythm, and have a higher production efficiency. In addition, since the lower die 3 is installed on the upper die 2, the blanking die can be directly removed from the workbench as a whole. Therefore, when the steel plate size is changed, the replacement of the blanking die can be quickly completed.

[0022] Embodiment 2: This embodiment is basically the same as Embodiment 1, the difference being that: in this embodiment, each elastic support mechanism 5 is a nitrogen spring.

[0023] In this embodiment, the bottom end of the nitrogen spring is fixed on the lower die 3, and the upper die 2 is fixed on the top end of the nitrogen spring, thereby realizing the installation of the upper die 2, the nitrogen spring, and the lower die 3. Since the upper die 2 and the lower die 3 are connected by the nitrogen spring, and at the same time the nitrogen spring also positions the upper die 2 and the lower die 3, when replacing the blanking die subsequently, there is no need to disassemble the upper die 2 on the press, nor to reposition the upper die 2 and the lower die 3 during installation.

[0024] Embodiment Three: This embodiment is basically the same as Embodiment One, the difference being that: in this embodiment, the first flexible buffer mechanism 6 is composed of multiple clusters of bristles distributed on the upper surface of the material support 4.

[0025] In this embodiment, bristles with lower cost are used to contact the steel plate and support the steel plate, and multiple clusters of bristles are sufficient to remain undeformed when supporting the steel plate fed into the blanking die, and deform under the pressure of the upper die 2 to move the steel plate downward to contact the lower arc-shaped cutter 7, realizing the cutting of the steel plate. After the upper die 2 is reset, the multiple clusters of bristles also reset, and the steel plate is moved upward again to separate from the lower arc-shaped cutter 7, avoiding the steel plate being scratched by the lower arc-shaped cutter 7 when being conveyed out.

[0026] Embodiment Four: This embodiment is basically the same as Embodiment One, the difference being that: in this embodiment, as Figure 3 and Figure 4 shown, a plurality of positioning pins 8 are arranged on the base 1, and a plurality of positioning grooves 9 corresponding to the plurality of positioning pins 8 one by one are arranged at the bottom of the lower die 3.

[0027] In this embodiment, when installing the lower die 3, by aligning the plurality of positioning grooves 9 with the plurality of positioning pins 8 one by one vertically, the lower die 3 moves downward and is supported by the base 1. At this time, the plurality of positioning pins 8 are inserted into the plurality of positioning grooves 9 one by one to achieve positioning. When replacing the blanking die, only the upper die 2 and the lower die 3 need to be replaced. Thus, the base 1 can be shared by multiple blanking dies, on the one hand, further reducing the difficulty of replacing the blanking die, and on the other hand, also reducing the cost of the blanking die.

[0028] Embodiment Five: This embodiment is basically the same as Embodiment Four, the difference being that: in this embodiment, a guiding mechanism 10 for guiding the steel plate to enter between the upper die 2 and the lower die 3 is further installed on the base 1, and a second flexible buffer mechanism 11 is arranged on the guiding mechanism 10.

[0029] In this embodiment, the guiding mechanism 10 is realized by using a width adjustment device that is mature in the current industry, and the second flexible buffer mechanism 11 is also realized by using multiple clusters of bristles with lower cost, avoiding the steel plate from making hard contact with the guiding mechanism 10 and generating scratches when moving in the guiding mechanism 10.

[0030] In this embodiment, the steel plate is guided by the guiding mechanism 10 so that the steel plate can enter between the upper die 2 and the lower die 3 along a preset path, ensuring the cutting accuracy.

[0031] Embodiment Six: This embodiment is basically the same as Embodiment Five, except that: in this embodiment, the guiding width of the guiding mechanism 10 can be adjusted to be applicable to guiding steel plates of different sizes.

[0032] In this embodiment, through the width adjustment of the guiding mechanism 10, it can be applicable to guiding steel plates of different sizes. Thus, when replacing the blanking die, both the guiding mechanism 10 and the base 1 can be shared among blanking dies of different specifications, saving the replacement time and cost.

[0033] In summary, through the change of the installation method and installation position of the upper die 2, and the setting of the first flexible buffer mechanism 6, the blanking die for the steel plate of the automotive stamping sheet metal part of the present invention can quickly complete the replacement of the blanking die when the steel plate size is changed, can shorten the press stroke, improve the production rhythm, has a high production efficiency, and has a wide application prospect in the automotive manufacturing industry.

Claims

1. A blanking die for a steel plate used in an automotive stamping sheet metal part, comprising a base, an upper die, a lower die and a blank holder. The base is fixed on a workbench. The lower die is installed on the base. The upper die is located above the lower die. The blank holder is arranged between the upper die and the lower die for supporting the steel plate. The upper die is provided with an upper arc-shaped cutter, and the lower die is provided with a lower arc-shaped cutter, characterized in that A plurality of elastic support mechanisms are arranged at intervals on the lower die, and the upper die is mounted on the plurality of elastic support mechanisms. When the elastic support mechanisms are in the initial state, the upper die and the lower die are in the die-separated state. When the upper die is pressed down by a press and moves downward by a preset distance, the upper die and the lower die are in the die-closed state. A flexible buffer mechanism is arranged on the upper surface of the blank holder.

2. The blanking die for the steel sheet of an automotive stamping sheet metal part according to claim 1, characterized in that Each elastic support mechanism is a nitrogen spring.

3. The blanking die for the steel plate of an automotive stamping sheet metal part according to claim 1, characterized in that The flexible buffer mechanism includes multiple clusters of bristles distributed on the upper surface of the blank holder.

4. The blanking die for the steel plate of an automotive stamping sheet metal part according to claim 1, characterized in that A plurality of positioning pins are arranged on the base, and a plurality of positioning grooves corresponding to the plurality of positioning pins one by one are arranged at the bottom of the lower die.

5. The blanking die for the steel sheet used in automotive stamping sheet metal parts according to claim 4, characterized in that A guiding mechanism for guiding the steel plate to enter between the upper die and the lower die is also mounted on the base, and a flexible buffer mechanism is also arranged on the guiding mechanism.

6. The blanking die for the steel plate used in the automotive stamping sheet metal part according to claim 5, characterized in that The guiding mechanism can adjust the guiding width to be suitable for guiding steel plates of different sizes.

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