A method for improving reliable stamping of a two-piece can

Abstract

The application provides a method for improving reliable stamping of two-piece cans, which can alarm when overlapping stamping does not occur, thereby ensuring that the two-piece cans can be reliably stamped. A sensor is arranged at the front position of each lower die seat of the progressive die set. If any sensor corresponding to the progressive die does not detect that material passes above during the process of step holding and feeding of the semi-finished product by the step holding claw, an alarm is sent. If all sensors corresponding to the progressive die detect that material passes above, the progressive die normally stamps.

Description

Technical Field

[0001] This invention relates to the technical field of two-piece can manufacturing, specifically to a method for improving the reliable stamping of two-piece cans. Background Technology

[0002] In the production and processing of two-piece cans, the sheet material needs to be formed into the can body through several sets of progressive dies. During this production process, the semi-finished products in adjacent dies are fed by stepping jaws as they move from front to back. Since the upper die is a punch and the lower die is a die during the can body processing, in the actual stamping process, after the upper die punches downwards, it may carry the semi-finished product away from the cavity of the lower die, causing the stepping jaws to leave empty space. This results in two sets of material at the empty position during the next stamping process, leading to overlapping stamping of the products. This situation is usually only discovered by quality inspectors when the overlapping product flows out of the progressive die or the empty position flows out of the progressive die. At this time, there are already defective products on the production line, and in severe cases, the mold cavity of the corresponding position may be damaged. Therefore, there is an urgent need to develop a method that can effectively alarm when overlapping stamping does not occur, thereby ensuring that the two-piece cans can be stamped reliably. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a method for improving the reliable stamping of two-piece cans, which can issue an alarm when overlapping stamping does not occur, thereby ensuring that the two-piece cans can be reliably stamped.

[0004] A method for improving the reliable stamping of two-piece cans is characterized in that a sensor is respectively installed at the front position of each lower die seat of the progressive die assembly. During the process of the stepping gripper feeding the semi-finished product, if any sensor corresponding to the progressive die does not detect material passing above, an alarm is issued. If all sensors corresponding to the progressive die detect material passing above, the progressive die will perform normal stamping operation.

[0005] Its further features are: The sensor is in the open state during the feeding process of the stepping gripper, and the vertical detection range of the sensor corresponds to the set height area of ​​the material in the clamping state. The height position of the upper die of the progressive die is outside the detection range of the sensor, ensuring that the sensor only detects the material. The stepping gripper is a pair of grippers. When each pair of grippers is in the clamping state, the corresponding sensing position of the sensor is empty, ensuring that the operation of the stepping gripper will not interfere with the sensor detection. The sensors are respectively set at the middle position of the width direction of the cavity corresponding to the lower mold base. When each pair of grippers is not holding material, the middle position of the width direction of the cavity is empty. The progressive die is combined with each pair of adjacent lower die holders to form a sensor mounting cavity, and the corresponding sensor is mounted in the sensor mounting cavity, which makes the sensor installation quick and convenient. The sensor is positioned so that it does not protrude above the upper surface of the lower die base, ensuring stable and reliable stamping. The sensor is turned off during stamping to avoid energy waste and false alarm triggering; When the first sensor located at the front end of the first module of the progressive die detects a material shortage, the cavity is set to a material shortage state. When the progressive die is pressed sequentially, the sensor at the material shortage position will not alarm if it does not detect material. This state is caused by the material shortage due to the untimely feeding at the front end, and will not affect the operation of the progressive die or product manufacturing. Therefore, it is set to the alarm elimination state. A forward-protruding mounting base is fixedly provided at the front end of the lower die holder of the first progressive die unit, and the corresponding first sensor is fixedly mounted on the forward-protruding mounting base. The upper surface of the first sensor does not protrude from the upper surface of the first lower die holder.

[0006] With the solution of this invention, a sensor is respectively installed at the front of each lower die holder of the progressive die assembly. During the process of the stepping gripper feeding the semi-finished product, if any sensor corresponding to the progressive die does not detect material passing above, an alarm is issued. If all sensors corresponding to the progressive die detect material passing above, the progressive die will perform normal stamping operation. This will cause the upper die to carry the semi-finished product away from the cavity of the lower die after the upper die has finished stamping downwards. When the stepping gripper is empty, the sensor of the corresponding lower die holder can reliably detect that there is no material at that position, and then issue an alarm to perform manual inspection. It can issue an alarm when overlapping stamping does not occur, thereby ensuring that the two cans can be reliably stamped. Attached Figure Description

[0007] Figure 1 This is a schematic diagram showing the arrangement of the mechanism corresponding to the method of the present invention; Figure 2 This is a schematic diagram of the sensor arrangement corresponding to the method of the present invention (excluding the stepping gripper). The names corresponding to the serial numbers in the diagram are as follows: First sensor 1, second sensor 2, third sensor 3, fourth sensor 4; Progressive module 100, first sensor embedded inner cavity 101, second sensor embedded inner cavity 102, third sensor embedded inner cavity 103, stepping gripper 200, gripper 201, first module 10, first upper mold 11, first lower mold base 12, front protruding mounting base 13, second module 20, second upper mold 21, second lower mold base 22, third module 30, third upper mold 31, third lower mold base 32, fourth module 40, fourth upper mold 41, fourth lower mold base 42. Detailed Implementation

[0008] A method for improving the reliable stamping of two-piece cans, see Figures 1-2 Each step die 100 has a sensor installed at the front of each lower die holder. If any sensor corresponding to the step die 100 does not detect material passing above during the stepping gripper feeding process, an alarm will be issued. If all sensors corresponding to the step die 100 detect material passing above, the step die will operate normally.

[0009] In practice, the sensor is in the open state during the feeding process of the stepping gripper 200, and the vertical detection range of the sensor corresponds to the set height area of ​​the material in the clamping state. The height position of the upper die of the progressive die 100 is outside the detection range of the sensor, ensuring that the sensor only detects the material. The stepping gripper 200 is a pair of grippers. When each pair of grippers 201 is in the clamping state, the corresponding sensor position is empty, ensuring that the operation of the stepping gripper 201 will not interfere with the sensor detection. The sensors are respectively set at the middle position of the width direction of the cavity corresponding to the lower mold base. When each pair of grippers 201 is not holding material, the middle position of the width direction of the cavity is empty. The progressive die 100 is combined with each pair of adjacent lower die holders to form a sensor mounting cavity, and the corresponding sensor is mounted in the sensor mounting cavity, which makes the sensor installation quick and convenient. The sensor's height position should not protrude above the upper surface of the lower die base to ensure stable and reliable stamping. The sensor is turned off during stamping to avoid energy waste and false alarm triggering; When the first sensor 1 located at the front end of the first module 10 of the progressive die 100 detects a material shortage, the cavity is set to a material shortage state. When the progressive die is stamped sequentially, the sensor at the material shortage position does not detect material and will not alarm. This state is caused by the material shortage due to the untimely feeding at the front end, which will not affect the operation of the progressive die 100 or the product manufacturing. Therefore, it is set to the alarm elimination state. A forward-protruding mounting base 13 is fixedly provided at the front end of the lower die base of the first module 10 of the progressive die 100, and the corresponding first sensor 1 is fixedly mounted on the forward-protruding mounting base 13. The upper surface of the first sensor 1 does not protrude from the upper surface of the first lower die base 12.

[0010] In a specific embodiment, the progressive die 100 includes four modules: a first module 10, a second module 20, a third module 30, and a fourth module 40. The first module 10 includes a first upper die 11 and a first lower die base 12; the second module 20 includes a second upper die 21 and a second lower die base 22; the third module 30 includes a third upper die 31 and a third lower die base 32; and the fourth module 40 includes a fourth upper die 41 and a fourth lower die base 42. A forward-protruding mounting base 13 is provided at the front end of the first lower die base 12, and the first sensor 1 is fixedly mounted on the forward-protruding mounting base 13. The connection between the first lower die base 12 and the second lower die base 22... The upper surface of the middle part of the position in the width direction is recessed to form a first sensor embedding cavity 101. The second sensor 2 is installed in the first sensor embedding cavity 101. The upper surface of the middle part of the connection position of the second lower mold base 22 and the third lower mold base 32 in the width direction is recessed to form a second sensor embedding cavity 102. The third sensor 3 is installed in the second sensor embedding cavity 102. The upper surface of the middle part of the width direction of the connection position of the third lower mold base 32 and the fourth lower mold base 42 is recessed to form a third sensor embedding cavity 103. The fourth sensor 4 is installed in the third sensor embedding cavity 103.

[0011] Its working principle is as follows: A sensor is set at the front of each lower die holder of the progressive die assembly. During the stepping gripper's feeding of the semi-finished product, if any sensor corresponding to the progressive die does not detect material passing above, an alarm is issued. If all sensors corresponding to the progressive die detect material passing above, the progressive die will perform normal stamping operation. This causes the upper die to carry the semi-finished product away from the cavity of the lower die after the upper die has finished stamping downwards. When the stepping gripper is empty, the sensor of the corresponding lower die holder can reliably detect that there is no material at that position, and then issue an alarm for manual inspection. It can issue an alarm when overlapping stamping does not occur, thereby ensuring that the two cans can be reliably stamped.

[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for improving the reliable stamping of two-piece cans, characterized in that, Each step die has a sensor installed at the front of each lower die holder in the progressive die assembly. If any sensor corresponding to the progressive die fails to detect material passing above during the stepping gripper's feeding of the semi-finished product, an alarm will be issued. If all sensors corresponding to the progressive die detect material passing above, the progressive die will operate normally.

2. The method for improving the reliable stamping of a two-piece can according to claim 1, characterized in that: The sensor is in the open state during the feeding process of the stepping gripper, and the vertical detection range of the sensor corresponds to the set height area of ​​the material in the clamping state. The height position of the upper die of the progressive die is outside the detection range of the sensor.

3. The method for improving the reliable stamping of a two-piece can according to claim 2, characterized in that: The stepping gripper consists of pairs of grippers, and each pair of grippers is empty at the sensor's sensing position when it is in the gripping state.

4. The method for improving the reliable stamping of a two-piece can according to claim 3, characterized in that: The sensors are respectively set at the middle position of the width direction of the cavity corresponding to the lower mold base. When each pair of grippers is not holding material, the middle position of the width direction of the cavity is empty.

5. The method for improving the reliable stamping of a two-piece can according to claim 1, characterized in that: The progressive die is combined between every two adjacent lower die holders to form a sensor mounting cavity, and the corresponding sensor is mounted in the sensor mounting cavity.

6. The method for improving the reliable stamping of a two-piece can according to claim 5, characterized in that: The sensor is positioned so that it does not protrude above the upper surface of the lower mold base.

7. The method for improving the reliable stamping of a two-piece can according to claim 1, characterized in that: The sensor is turned off during stamping to avoid energy waste and false alarms.

8. The method for improving the reliable stamping of a two-piece can according to claim 1, characterized in that: When the first sensor located at the front end of the first module of the progressive die detects a material shortage, the cavity is set to a material shortage state. When the progressive die is pressed sequentially, the sensor at the material shortage position will not alarm if it does not detect material. This state is caused by the material shortage due to untimely feeding at the front end, and will not affect the operation of the progressive die or product manufacturing. Therefore, it is set to alarm clearance state.

9. A method for improving the reliable stamping of a two-piece can according to claim 5, characterized in that: A forward-protruding mounting base is fixedly provided at the front end of the lower die holder of the first progressive die unit, and the corresponding first sensor is fixedly mounted on the forward-protruding mounting base. The upper surface of the first sensor does not protrude from the upper surface of the first lower die holder.

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