Progressive stamping die for a latching lock part

Abstract

This utility model discloses a progressive stamping die for a magnetic lock component, relating to the field of stamping die technology. It includes an upper die and a lower die, with the following sequentially arranged along the material feeding direction: a bulging module; a hole extrusion module group, comprising multiple sub-hole extrusion modules distributed sequentially at different progressive stations along the material feeding direction; a hole upsetting module, located at the progressive station between the two rearmost sub-hole extrusion modules; a deburring and upsetting module, used to deburr the opening of a pre-formed hole, axially extruding and shaping the edge of the pre-formed hole opening, and simultaneously shaping the circular bulge into a cylindrical boss; and a punching module, used to punch through holes at the bottom of the cylindrical boss. This utility model employs multiple stretching and shaping processes to ensure the dimensional accuracy of the cylindrical boss structure, meeting the tolerance requirements of magnetic lock products.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a progressive stamping die for a suction lock part. Background Technology

[0002] A magnetic or electromagnetic lock is a type of lock that uses magnetic or electromagnetic force to achieve automatic attraction and locking. It replaces the traditional mechanical lock's latch insertion or rotation locking method with attraction action. It features convenient operation, compact structure, and quiet operation, and is widely used in furniture, home appliances, automobiles, industrial equipment and other scenarios.

[0003] like Figure 1 The image shows a mounting plate part for a magnetic lock. This mounting plate part features a unique cylindrical boss structure. This cylindrical boss has a very high drawing height and requires high dimensional accuracy in terms of height and wall thickness. Currently, conventional one-time drawing processes cannot meet the dimensional accuracy requirements of this cylindrical boss structure. Multiple drawing and forming processes are required, with strict dimensional control at each stage to achieve the desired precision. Therefore, it is necessary to provide a progressive stamping die for magnetic lock parts. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a progressive stamping die for suction lock parts, which adopts multiple stretching and shaping processes to ensure the dimensional accuracy of the cylindrical boss structure and meet the tolerance requirements of suction lock products.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A progressive stamping die for a latching lock component includes an upper die and a lower die. Along the feeding direction of the strip, the upper and lower dies are sequentially provided with: a convex-forming module for stamping a downwardly protruding circular convex shape onto the mounting plate component, the top of which has a pre-formed hole; and a perforation module group, comprising multiple sub-perforation modules, each distributed sequentially at different progressive stations along the feeding direction of the strip, each sub-perforation module sequentially extruding the pre-formed hole to reduce its diameter. The extrusion and upsetting module is located on the progressive station between the two rearmost sub-extrusion modules. It is used to extrude the pre-made holes to reduce their diameter and to axially extrude and shape the edges of the holes. The deburring and upsetting module is used to deburr the holes and axially extrude and shape the edges of the holes, while shaping the circular convex bulge into a cylindrical boss. The punching module is used to punch through holes at the bottom of the cylindrical boss.

[0007] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0008] When machining the cylindrical boss structure on the mounting plate part of the magnetic lock, the material is first pre-cut into the mounting plate part through a trimming process on the mold; then, a large-sized circular boss is punched out on the mounting plate part by a punching module; then, multiple sub-extrusion modules of the extrusion module group extrude the pre-made holes of the large-sized circular boss step by step to reduce the diameter of the pre-made holes, gradually reducing the circular boss to a suitable size; next, the pre-made holes of the circular boss are extruded by the extrusion and upsetting module, while the edge of the pre-made hole is axially extruded and shaped; finally, the circular boss is upset by the deburring and upsetting module. The pre-made holes of the package are deburred, and the edges of the pre-made holes are axially extruded and shaped. The circular protrusion is then shaped into a cylindrical boss structure. Finally, a through hole is punched at the bottom of the cylindrical boss using a punching module, resulting in a cylindrical boss structure that runs vertically through the top and bottom. This utility model uses multiple stretching and shaping processes to punch a large-sized circular protrusion on the mounting plate part, and then gradually reduces the size of the circular protrusion. The shape and height of each reduction are strictly controlled, and then it is shaped into a cylindrical boss structure, ensuring the dimensional accuracy of the cylindrical boss structure and meeting the tolerance requirements of the suction lock product. Attached Figure Description

[0009] Figure 1 A schematic diagram of the mounting plate components on the magnetic lock;

[0010] Figure 2 This is a schematic diagram of the upper mold structure;

[0011] Figure 3 This is a schematic diagram of the lower mold structure;

[0012] Figure 4 This is a cross-sectional view of the convex hull module;

[0013] Figure 5 This is a cross-sectional view of the sub-extrusion module;

[0014] Figure 6 This is a cross-sectional view of the extrusion and upsetting module;

[0015] Figure 7 This is a cross-sectional view of the deburring and upsetting hole module;

[0016] Figure 8 This is a cross-sectional view of the punching module;

[0017] Figure 9 This is a cross-sectional view of the shaping module;

[0018] Figure 10 This is a cross-sectional view of the punching and upsetting module;

[0019] Figure 11 This is a schematic diagram of the masterbatch material for mounting plate parts.

[0020] The diagram is labeled as follows: 1. Upper die; 2. Lower die; 3. Embossing module; 31. Embossing punch; 32. Embossing die; 321. First ejector pin; 4. Extrusion module group; 41. Sub-extrusion module; 411. Extrusion punch; 412. Extrusion die; 4121. Second ejector pin; 5. Extrusion and upsetting module; 51. Extrusion and upsetting punch; 511. First fixing rod; 512. First working head; 52. Extrusion and upsetting die; 521. Third ejector pin; 6. Deburring and upsetting module; 61. Deburring and upsetting punch; 611. Second fixing rod; 612. Second working head; 62, deburring and upsetting die; 621, fourth ejector pin; 7, punching module; 71, punching punch; 72, punching die; 721, ejector block; 7211, scrap drop hole; 8, shaping module; 81, positioning hole; 82, shaping punch; 9, punching and upsetting module; 91, punching and upsetting punch; 92, punching and upsetting die; 921, fifth ejector pin; 10, first limiting shoulder; 20, second limiting shoulder; 30, mounting plate part; 40, circular protrusion; 401, pre-drilled hole; 50, cylindrical boss; 501, through hole. Detailed Implementation

[0021] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 2-10As shown in the embodiment of this application, the progressive stamping die for a latching lock part includes an upper die 1 and a lower die 2. Along the feeding direction of the material, the upper die 1 and lower die 2 are sequentially provided with a convex-forming module 3, a hole-forming module group 4, a hole-forming and upsetting module 5, a deburring and upsetting module 6, and a punching module 7. The convex-forming module 3 is used to punch a downwardly protruding circular convex 40 on the mounting plate part 30, with a pre-formed hole 401 formed on the top of the circular convex 40. The hole-forming module group 4 includes multiple sub-hole-forming modules 41, each distributed sequentially at different progressive stations along the feeding direction of the material. Each sub-hole-forming module 41 is used to sequentially extrude the pre-formed hole 401 to reduce its diameter. The hole-forming and upsetting module 5 is distributed in the two rearmost sub-holes. At the progressive station between modules 41, the pre-made hole 401 is extruded to reduce its diameter, and the edge of the hole 401 is axially extruded and shaped. The deburring and upsetting module 6 is used to deburr the hole of the pre-made hole 401, axially extrude and shape the edge of the hole 401, and shape the circular protrusion 40 into a cylindrical boss 50. The punching module 7 is used to punch through holes 501 at the bottom of the cylindrical boss 50.

[0024] In processing the cylindrical boss 50 structure on the mounting plate part 30, the present invention first pre-cuts the material into the mounting plate part 30 through a trimming process on the mold; secondly, the mounting plate part 30 is stamped by the punching module 3, causing the mounting plate part 30 to undergo stretching deformation to obtain a large-sized circular boss 40; then, the pre-made holes 401 of the large-sized circular boss 40 are extruded step by step by multiple sub-extrusion modules 41 of the extrusion module group 4 to reduce the diameter of the pre-made holes 401, gradually reducing the circular boss 40 to a suitable size; furthermore, the pre-made holes 401 of the circular boss 40 are extruded by the extrusion and upsetting module 5, while simultaneously extruding the edges of the pre-made holes 401. The pre-drilled hole 401 is axially extruded and shaped to refine its edge shape, ensuring that the edge meets the workpiece requirements. Next, the pre-drilled hole 401 of the circular protrusion 40 is deburred using the deburring and upsetting module 6. By applying vertical pressure to the burr area, the burr undergoes plastic deformation under pressure and is flattened and adhered to the workpiece surface, thus eliminating the sharpness of the burr. At the same time, the edge of the pre-drilled hole 401 is axially extruded and shaped, and the circular protrusion 40 is shaped into a cylindrical boss 50 structure. Finally, a through hole 501 is punched at the bottom of the cylindrical boss 50 using the punching module 7, resulting in a cylindrical boss 50 structure that runs vertically through the top and bottom.

[0025] Specifically, the embossing module 3 includes an embossing punch 31 on the upper mold 1 and an embossing die 32 on the lower mold 2. The cavity of the embossing die 32 is provided with a first ejector pin 321 for pressing against the bottom of the circular embossing 40. The lower end of the first ejector pin 321 is connected to a nitrogen spring (not shown in the figure). The embossing punch 31 and the embossing die 32 work together to stamp a large-sized circular embossing 40 on the mounting plate part 30. When the mold is opened, the first ejector pin 321 can push the mounting plate part 30 out due to the elastic force of the nitrogen spring.

[0026] The extrusion module 41 includes an extrusion punch 411 mounted on the upper die 1 and an extrusion die 412 mounted on the lower die 2. The cavity of the extrusion die 412 is provided with a second ejector pin 4121 for pressing against the bottom of the circular protrusion 40. A nitrogen spring (not shown in the figure) is connected to the lower end of the second ejector pin 4121. The extrusion punch 411 and the extrusion die 412 work together to extrude the pre-drilled hole 401 of the circular protrusion 40. When the die is opened, the second ejector pin 4121 can eject the mounting plate part 30.

[0027] Furthermore, the height and outer diameter of the extrusion punches 411 of the sub-extrusion modules 41 at different progressive stations decrease sequentially along the feeding direction of the strip, and the cavity height and inner diameter of the extrusion die 412 decrease sequentially along the feeding direction of the strip. As a result, multiple sub-extrusion modules 41 sequentially extrude the pre-formed holes 401 of the circular protrusion 40 along the feeding direction of the strip, so that the hole diameter and height of the pre-formed holes 401 gradually decrease to meet the specified requirements.

[0028] The extrusion and upsetting module 5 includes an extrusion and upsetting punch 51 on the upper die 1 and an extrusion and upsetting die 52 on the lower die 2. The extrusion and upsetting punch 51 includes a cylindrical first fixing rod 511 and a first working head 512 with a circular lower end. The first fixing rod 511 is fixed on the upper die 1, and the first working head 512 is coaxial with the lower end of the fixing rod. The first working head 512 is used to penetrate downward into the pre-made hole 401 of the circular protrusion 40, and a first limiting shoulder 10 is provided between the first working head 512 and the first fixing rod 511. The first limiting shoulder 10 is used to axially extrude and shape the edge of the hole of the pre-made hole 401. The cavity of the extrusion and upsetting die 52 is provided with a third push rod 521 for pressing against the bottom of the circular protrusion 40. The lower end of the third push rod 521 is connected to a nitrogen spring (not shown in the figure). The first working head 512 and the extrusion and upsetting die 52 work together to extrude the pre-made hole 401 of the circular protrusion 40. At the same time, the first limiting shoulder 10 axially extrudes and shapes the edge of the pre-made hole 401. When the mold is opened, the third ejector pin 521 can eject the mounting plate part 30.

[0029] The deburring and upsetting module 6 includes a deburring and upsetting punch 61 on the upper die 1 and a deburring and upsetting die 62 on the lower die 2. The deburring and upsetting punch 61 includes a cylindrical second fixing rod 611 and a cylindrical second working head 612. The second fixing rod 611 is fixed on the upper die 1, and the second working head 612 is coaxial with the lower end of the fixing rod. The second working head 612 is used to penetrate downward into the pre-made hole 401 of the circular protrusion 40 to shape the circular protrusion 40 into a cylindrical boss 50. A second limiting shoulder 20 is provided between the second working head 612 and the second fixing rod 611. An arc-shaped transition surface is provided between the plane of the second working head 612 and the second limiting shoulder 20. A fourth push rod 621 is provided in the cavity of the deburring and upsetting die 62 for pressing against the bottom of the cylindrical boss 50. A nitrogen spring (not shown in the figure) is connected to the lower end of the fourth push rod 621. The second working head 612 and the deburring and upsetting die 62 work together to shape the circular protrusion 40 into a cylindrical boss 50 structure. At the same time, the second limiting shoulder 20 axially extrudes and shapes the edge of the pre-made hole 401, and the arc transition surface deburrs the opening of the pre-made hole 401. When the mold is opened, the fourth ejector pin 621 can eject the mounting plate part 30.

[0030] The punching module 7 includes a punching punch 71 on the upper die 1 and a punching die 72 on the lower die 2. The punching punch 71 is used to pass downward through the inner cavity of the cylindrical boss 50. The cavity of the punching die 72 has a top block 721 fixed inside for pressing against the bottom of the cylindrical boss 50. The top block 721 has a scrap hole 7211 in the middle that matches the punching punch 71.

[0031] A shaping module 8 is also provided on the progressive station located behind the punching module 7 on the upper die 1 and the lower die 2. The shaping module 8 is used to shape the cylindrical boss 50. The shaping module 8 includes a positioning hole 81 on the upper die 1 and a shaping punch 82 on the lower die 2. The shaping punch 82 is used to pass through the inner cavity of the cylindrical boss 50 upward and press against the lower end of the positioning hole 81 to modify the structure of the cylindrical boss 50 to meet the shape and size requirements.

[0032] The upper die 1 and the lower die 2 are also equipped with a punching and upsetting module 9 on the progressive station located behind the forming module 8. The punching and upsetting module 9 is used to axially extrude and shape the edge of the bottom through hole 501 of the cylindrical boss 50, and to trim the shape of the edge of the bottom through hole 501 of the cylindrical boss 50 to ensure that the edge of the hole meets the requirements of the workpiece. The punching and upsetting module 9 includes a punching and upsetting punch 91 on the upper die 1 and a punching and upsetting die 92 on the lower die 2. The punching and upsetting punch 91 is used to penetrate downward into the inner cavity of the cylindrical boss 50. The cavity of the punching and upsetting die 92 is provided with a fifth push rod 921 for pressing against the edge of the bottom through hole 501 of the cylindrical boss 50. The lower end of the fifth push rod 921 is connected to a nitrogen spring (not shown in the figure).

[0033] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A progressive stamping die for a latch part comprising an upper die and a lower die, characterized in that, The upper and lower dies are sequentially provided with the following along the feeding direction of the material: A punching module is used to punch out a downwardly protruding circular protrusion on a mounting plate part, and a pre-made hole is formed on the top of the circular protrusion. The extrusion module group includes multiple sub-extrusion modules, each of which is sequentially distributed on different progressive stations along the feeding direction of the strip. Each sub-extrusion module is used to sequentially extrude the pre-made holes to reduce the diameter of the pre-made holes. The extrusion and upsetting module is located at the progressive station between two rearward sub-extrusion modules. It is used to extrude the pre-made hole to reduce the diameter of the pre-made hole, and at the same time to axially extrude and shape the edge of the pre-made hole. The deburring and upsetting module is used to deburr the opening of a pre-made hole, axially extrude and shape the edge of the opening of the pre-made hole, and simultaneously shape the circular convex hull into a cylindrical boss. A punching module is used to punch through holes at the bottom of a cylindrical boss.

2. The progressive stamping die for a latch part according to claim 1, characterized by: The embossing module includes an embossing punch on the upper die and an embossing die on the lower die. The cavity of the embossing die is provided with a first push rod for pressing against the bottom of the circular embossing.

3. The progressive stamping die for a latch part according to claim 1, wherein: The sub-extrusion module includes an extrusion punch on the upper die and an extrusion die on the lower die. The cavity of the extrusion die is provided with a second push rod for pressing against the bottom of the circular protrusion.

4. The progressive stamping die for a latch part according to claim 3, characterized in that: The height and outer diameter of the extrusion punch of the sub-extrusion module at different progressive stations decrease sequentially along the feeding direction of the strip, and the cavity height and inner diameter of the extrusion die decrease sequentially along the feeding direction of the strip.

5. The progressive stamping die for a latch part according to claim 1, wherein: The extrusion and upsetting module includes an extrusion and upsetting punch on the upper die and an extrusion and upsetting die on the lower die. The extrusion and upsetting punch includes a cylindrical first fixing rod and a first working head with a circular lower end. The first fixing rod is fixed on the upper die, and the first working head is coaxial with the lower end of the fixing rod. The first working head is used to penetrate downward into the pre-made hole of the circular protrusion, and a first limiting shoulder is provided between the first working head and the first fixing rod. The cavity of the extrusion and upsetting die is provided with a third push rod for pressing against the bottom of the circular protrusion.

6. The progressive stamping die for a latch part according to claim 1, wherein: The deburring and upsetting module includes a deburring and upsetting punch on the upper die and a deburring and upsetting die on the lower die. The deburring and upsetting punch includes a cylindrical second fixed rod and a cylindrical second working head. The second fixed rod is fixed on the upper die, and the second working head is coaxial with the lower end of the fixed rod. The second working head is used to penetrate downward into the pre-made hole of the circular protrusion. A second limiting shoulder is provided between the second working head and the second fixed rod, and an arc-shaped transition surface is provided between the plane of the second working head and the plane of the second limiting shoulder. The cavity of the deburring and upsetting die is provided with a fourth push rod for pressing against the bottom of the cylindrical protrusion.

7. The progressive stamping die for a latch part according to claim 1, wherein: The punching module includes a punching punch on the upper die and a punching die on the lower die. The punching punch is used to pass downward through the inner cavity of the cylindrical boss. A top block is fixed in the cavity of the punching die to support the bottom of the cylindrical boss. A waste material drop hole matching the punching punch is opened in the middle of the top block.

8. The progressive stamping die for a latch part according to claim 1, wherein: The upper die and the lower die are further provided with a shaping module on the progressive station at the rear side of the punching module, the shaping module is used for shaping the cylindrical boss; the shaping module comprises a positioning hole arranged on the upper die and a shaping punch arranged on the lower die, the shaping punch is used for penetrating into the inner cavity of the cylindrical boss upward and abutting against the lower end of the positioning hole.

9. The progressive stamping die for a latch part according to claim 8, wherein: The upper die and the lower die are further provided with a punching-upsetting module on the progressive station at the rear side of the shaping module, the punching-upsetting module is used for axially extruding and shaping the orifice edge of the bottom through hole of the cylindrical boss; the punching-upsetting module comprises a punching-upsetting punch arranged on the upper die and a punching-upsetting die arranged on the lower die, the punching-upsetting punch is used for penetrating into the inner cavity of the cylindrical boss downward, and a fifth top rod for abutting against the orifice edge of the bottom through hole of the cylindrical boss is arranged in the cavity of the punching-upsetting die.

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