Riveting tool for improving metallographic phase of contact assembly of alternating current contactor

Abstract

The riveting tool for improving the metallographic phase of the contact assembly of the alternating current contactor comprises an upper die assembly and a lower die assembly matched with the upper die assembly, the upper die assembly comprises an upper die fixing plate, a base plate and an upper die demolding plate, the upper die demolding plate is in bolted connection with an upper riveting die, and a plurality of first mounting holes are formed in the bottom of the upper die demolding plate; the top of the upper riveting die is provided with a second mounting hole corresponding to the first mounting hole, a spring is arranged in the first mounting hole, the other end of the spring extends into the second mounting hole, and the upper riveting die pre-presses the contact assembly during riveting through the elastic force of the spring. The design of the spring ensures that uniform and stable pre-pressing is applied to the contact assembly in the riveting process, the combination quality of riveting points is improved, the metallographic phase defect caused by uneven pressure is reduced, accurate positioning of the contact assembly in the riveting process is ensured through the elastic force of the spring, deviation or dislocation is reduced, and the overall riveting precision and consistency are improved.

Description

Technical Field

[0001] The utility model relates to a riveting tool for improving the metallographic phase of a contact assembly of an AC contactor, belonging to the field of electric contact tooling. Background Art

[0002] AC contactor is an electrical switching device widely used in various control circuits and power systems. Its main function is to control and cut off the current in the circuit.

[0003] An AC contactor consists of an electromagnetic system and a mechanical system. The electromagnetic system consists of a magnet, a coil, and moving parts. When power is applied to the coil, the magnet generates a magnetic field, attracting or releasing the moving parts, thereby actuating the mechanical system. The mechanical system, consisting of components such as contacts and springs, operates in response to the electromagnetic system, closing or opening the contacts. The contacts are typically made of a silver alloy, which offers excellent electrical conductivity and wear resistance.

[0004] The importance of AC contactors cannot be underestimated. They play a vital role in controlling circuits and power systems, and are fundamental to the safe operation of modern industrial production, household appliance control, and power systems. The contact assembly is one of the key contact components of an AC contactor. The metallographic performance of the contact riveting joint is a key factor affecting the electrical life of the contact assembly. In today's rapidly developing world, customer demands for contact assembly products are increasing, and existing riveting performance is no longer sufficient. To meet these demands, there is an urgent need to improve the quality of contact riveting. Therefore, an efficient riveting tool that can improve the metallographic properties of the contact assembly is urgently needed. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a riveting tool for improving the metallographic structure of a contact assembly of an AC contactor.

[0006] A riveting tool for improving the metallographic structure of an AC contactor contact assembly comprises an upper die assembly and a lower die assembly cooperating with the upper die assembly, the upper die assembly comprising an upper die fixing plate, a backing plate and an upper die stripper plate, the upper die stripper plate being bolted to an upper rivet die, a plurality of first mounting holes being provided at the bottom of the upper die stripper plate, a second mounting hole being provided at the top of the upper rivet die corresponding to the first mounting holes, a spring being provided in the first mounting hole, the other end of the spring extending into the second mounting hole, the upper rivet die pre-pressing the contact assembly during riveting by the elastic force of the spring, the design of the spring ensuring uniform and stable pre-pressure on the contact assembly during the riveting process, which helps to improve the riveting point The spring's elastic force ensures accurate positioning of the contact assembly during the riveting process, reduces offset or misalignment, and improves the overall riveting accuracy and consistency. Uniform preloading can improve the fluidity of metal materials, achieve better metallographic structure, and help enhance the mechanical properties and life of the contact assembly. The spring's buffering effect can effectively reduce stress concentration during processing and reduce cracks or other defects that may occur in the contact assembly during the riveting process. The tooling design allows for flexible adjustment of the spring's preload on contact assemblies with different requirements and specifications, which helps adapt to different processing needs and improves the versatility of the tooling.

[0007] Preferably, the number of the first mounting holes, the second mounting holes and the springs is four, which are evenly distributed on the upper die stripping plate and the upper rivet die respectively. The elastic force provided by the four springs can enable the upper rivet die to pre-press the contact during riveting, thereby improving the product riveting metallographic structure.

[0008] Preferably, the first mounting hole is connected to a first connecting hole, and a second connecting hole is provided in the second mounting hole. The upper mold stripper plate is fixedly connected to the second connecting hole of the upper rivet mold through the first connecting hole by bolts. The bolted connection ensures a firm connection between the upper mold stripper plate and the upper rivet mold, avoids positional deviation caused by uneven force during the riveting process, and enhances the stability of the entire structure. Through such a connection design, upper rivet molds of different specifications can be easily replaced to adapt to different types of contact assemblies, thereby enhancing the flexibility and applicability of the tooling.

[0009] Preferably, a die handle is provided on the top of the upper die fixing plate, and the die handle is used to be fixedly connected to the punch press. The die handle serves as a connection interface to ensure a firm connection between the upper die fixing plate and the punch press, thereby improving the stability of the die during operation and avoiding displacement or vibration during riveting or stamping. The stable connection helps to maintain the accuracy of the die position during high-frequency stamping or riveting operations, thereby improving the repeatability and consistency of each processing and reducing quality problems caused by die position deviation.

[0010] Preferably, the upper rivet die is provided with a first fixing hole, an upper rivet die core extending to the top of the lower die assembly is provided in the first fixing hole, second fixing holes are provided on both sides of the first fixing hole, and guide columns are provided in the second fixing holes extending to the top of the lower die assembly. The design of the first fixing hole and the guide column ensures that the upper rivet die can be accurately positioned during operation, which is conducive to reducing deviations during processing, improving riveting accuracy, replacing upper rivet die cores of different specifications to adapt to different types of contact assemblies, and enhancing the flexibility and applicability of the tooling.

[0011] Preferably, the lower die assembly includes a lower die fixing plate, a lower rivet die is fixed on the lower die fixing plate, a connecting hole is provided on the lower rivet die, and a lower rivet die core extending into the connecting hole is fixed on the lower die fixing plate. Through the reasonable layout of the lower die fixing plate, the lower rivet die, the connecting hole and the lower rivet die core, the entire lower die assembly structure is compact, unnecessary space occupation is reduced, and it helps to improve the overall utilization rate of the mold. The fixed design of the lower die fixing plate and the lower rivet die enables the lower rivet die to be easily installed or replaced, thereby improving the process flexibility of the mold and being able to adapt to changes in different products or production requirements.

[0012] Preferably, the lower die of the lower die assembly is provided with a guide hole for docking with a guide post. The cooperation between the guide post and the guide hole plays a key guiding role in the riveting tooling. Its main function is to ensure that the upper and lower rivet dies align in the correct position. This precise guidance can produce riveted products with better metallographic properties.

[0013] Preferably, the lower riveting die is provided with a first profiling groove for fixing the outer shape of the product to be riveted. The first profiling groove is designed to precisely match the outer shape of the product to be riveted, thereby ensuring the accurate positioning of the product during the riveting process. This helps to improve riveting accuracy and reduce the scrap rate caused by position deviation. By fixing the product with the profiling groove, the riveted position and shape of each product can be ensured to be consistent, thereby improving the consistency of product quality and reducing the variation between batches.

[0014] Preferably, the lower rivet die core is provided with a second profiling groove for fixing the outer shape of the rivet head to be riveted. By accurately fixing the position of the rivet, it can be ensured that the rivet is evenly stressed during the riveting process, reducing stress concentration, thereby improving the riveting quality and ensuring a close bond between the rivet and the substrate. The design of the second profiling groove makes it easier for the operator to place the rivet in the correct position, reducing the complexity of the operation and the possibility of errors, and improving production efficiency.

[0015] The beneficial effects of the present invention are as follows: the design of the spring ensures that uniform and stable pre-pressure is applied to the contact assembly during the riveting process, which helps to improve the bonding quality of the riveted points and reduce metallographic defects caused by uneven pressure. The elastic force of the spring ensures that the contact assembly is accurately positioned during the riveting process, reduces offset or misalignment, and improves the overall riveting accuracy and consistency. Uniform pre-pressure can improve the fluidity of metal materials, achieve better metallographic structure, and help enhance the mechanical properties and life of the contact assembly. The buffering effect of the spring can effectively reduce stress concentration during the processing process and reduce cracks or other defects that may occur in the contact assembly during the riveting process. The tooling design makes it possible to flexibly adjust the pre-pressure of the spring on contact assemblies with different requirements and specifications, which helps to adapt to different processing needs and improve the versatility of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0017] Figure 1 This is the main structure diagram of the utility model;

[0018] Figure 2 The structural diagram is to remove some parts;

[0019] Figure 3 for Figure 2 sectional view of

[0020] Figure 4 This is a structural diagram of the present invention from an upward viewing angle;

[0021] In the figure, 1. upper mold assembly; 11. upper mold fixing plate; 12. pad; 13. upper mold stripper plate; 131. first mounting hole; 132. first connecting hole; 14. upper rivet mold; 141. second mounting hole; 142. spring; 143. second connecting hole; 144. first fixing hole; 145. upper rivet mold core; 146. second fixing hole; 147. guide column; 2. mold handle; 3. lower mold assembly; 31. lower mold fixing plate; 32. lower rivet mold; 321. connecting hole; 322. guide hole; 323. first profiling groove; 33. lower rivet mold core; 331. second profiling groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0024] The directional and positional terms used in this invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are used solely to refer to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are intended to illustrate and facilitate understanding of this invention and are not intended to limit the scope of protection of this invention.

[0025] like Figure 1-4 As shown, an embodiment of the present invention is a riveting tool for improving the metallographic structure of the contact assembly of an AC contactor, comprising an upper die assembly 1 and a lower die assembly 3 cooperating with the upper die assembly 1, the upper die assembly 1 comprising an upper die fixing plate 11, a backing plate 12 and an upper die stripper plate 13, the upper die stripper plate 13 being bolted to an upper rivet die 14, a plurality of first mounting holes 131 being provided at the bottom of the upper die stripper plate 13, a second mounting hole 141 being provided at the top of the upper rivet die 14 corresponding to the first mounting hole 131, a spring 142 being provided in the first mounting hole 131, the other end of the spring 142 extending into the second mounting hole 141, the upper rivet die 14 pre-presses the contact assembly during riveting by the elastic force of the spring 142, and the design of the spring 142 ensures that the contact assembly is pre-pressed during the riveting process A uniform and stable pre-stress is applied to the contact assembly, which helps to improve the bonding quality of the riveted points and reduce metallographic defects caused by uneven pressure. The elastic force of the spring 142 ensures that the contact assembly is accurately positioned during the riveting process, reduces offset or misalignment, and improves the overall riveting accuracy and consistency. Uniform pre-stress can improve the fluidity of metal materials, achieve better metallographic structure, and help enhance the mechanical properties and life of the contact assembly. The buffering effect of the spring 142 can effectively reduce stress concentration during processing and reduce cracks or other defects that may occur in the contact assembly during the riveting process. The tooling design makes it possible to flexibly adjust the pre-stress of the spring 142 on contact assemblies with different requirements and specifications, which helps to adapt to different processing needs and improve the versatility of the tooling.

[0026] There are four first mounting holes 131, four second mounting holes 141 and four springs 142, which are evenly distributed on the upper die stripper plate 13 and the upper rivet die 14. The elastic force provided by the four springs 142 can enable the upper rivet die 14 to pre-press the contacts during riveting, thereby improving the product riveting metallurgy.

[0027] The first mounting hole 131 is connected to the first connecting hole 132, and the second mounting hole 141 is provided with a second connecting hole 143. The upper mold stripper plate 13 is fixedly connected to the second connecting hole 143 of the upper rivet mold 14 through the first connecting hole 132 by bolts. The bolted connection ensures a firm connection between the upper mold stripper plate 13 and the upper rivet mold 14, avoids positional deviation caused by uneven force during the riveting process, and enhances the stability of the entire structure. Through such a connection design, upper rivet molds 14 of different specifications can be easily replaced to adapt to different types of contact assemblies, thereby enhancing the flexibility and applicability of the tooling.

[0028] A die handle 2 is provided on the top of the upper die fixing plate 11, and the die handle 2 is used to be fixedly connected to the punch press. The die handle 2 serves as a connection interface to ensure a firm connection between the upper die fixing plate 11 and the punch press, thereby improving the stability of the die during operation and avoiding displacement or vibration during riveting or stamping. The stable connection helps to maintain the accuracy of the die position during high-frequency stamping or riveting operations, thereby improving the repeatability and consistency of each processing and reducing quality problems caused by die position deviation.

[0029] The upper rivet die 14 is provided with a first fixing hole 144, and an upper rivet die core 145 extending to the top of the lower die assembly 3 is provided in the first fixing hole 144. Second fixing holes 146 are provided on both sides of the first fixing hole 144, and a guide column 147 extending to the top of the lower die assembly 3 is provided in the second fixing hole 146. The design of the first fixing hole 144 and the guide column 147 ensures that the upper rivet die 14 can be accurately positioned during operation, which is conducive to reducing deviations during processing, improving riveting accuracy, and replacing upper rivet die cores 145 of different specifications to adapt to different types of contact assemblies, thereby enhancing the flexibility and applicability of the tooling.

[0030] The lower die assembly 3 includes a lower die fixing plate 31, on which a lower rivet die 32 is fixed, and a connecting hole 321 is provided on the lower rivet die 32, and a lower rivet die core 33 extending into the connecting hole 321 is fixed on the lower die fixing plate 31. Through the reasonable layout of the lower die fixing plate 31, the lower rivet die 32, the connecting hole 321 and the lower rivet die core 33, the entire lower die assembly 3 is compact in structure, which reduces unnecessary space occupation and helps to improve the overall utilization rate of the mold. The fixed design of the lower die fixing plate 31 and the lower rivet die 32 enables the lower rivet die 32 to be easily installed or replaced, thereby improving the process flexibility of the mold and being able to adapt to changes in different products or production requirements.

[0031] The lower die 32 of the lower die assembly 3 is provided with a guide hole 322 for mating with the guide post 147. The cooperation between the guide post 147 and the guide hole 322 plays a key guiding role in the riveting tooling. Its main function is to ensure that the upper die 14 and the lower die 32 are aligned in the correct position. This precise guidance can produce riveted products with better metallographic properties.

[0032] The lower riveting die 32 is provided with a first profiling groove 323 for fixing the outer shape of the product to be riveted. The first profiling groove 323 is designed to precisely match the outer shape of the product to be riveted, thereby ensuring the accurate position of the product during the riveting process. This helps to improve riveting accuracy and reduce the scrap rate caused by position deviation. By fixing the product with the profiling groove, the riveted position and shape of each product can be guaranteed to be consistent, thereby improving the consistency of product quality and reducing the variation between batches.

[0033] The lower rivet die core 33 is provided with a second profiling groove 331 for fixing the outer shape of the rivet head to be riveted. By accurately fixing the position of the rivet, it can be ensured that the rivet is evenly stressed during the riveting process, reducing stress concentration, thereby improving the riveting quality and ensuring a close bond between the rivet and the substrate. The design of the second profiling groove 331 makes it easier for the operator to place the rivet in the correct position, reducing operational complexity and the possibility of error, and improving production efficiency.

[0034] As shown in the tooling assembly diagram, the operator sequentially places the rivets and contacts of the product to be riveted onto the lower riveting die core 33. Then, they press the small punch switch, which causes the upper riveting die 14 to close the lower riveting die 32. During the closing process, the upper riveting die 14 first contacts the contacts. The spring force provided by the spring 142 compresses the contacts and rivets, minimizing the gap between the contacts and the rivet. As the closing process continues, the upper riveting die core 145 contacts and presses the rivet legs, deforming them and completing one riveting cycle. After the riveting cycle is complete, the upper riveting die 14 separates from the lower riveting die 32, returning the upper riveting die 14 to its original position, completing one riveting cycle. The operator removes the product and replaces it with the next product to be riveted, completing the next riveting cycle. During the riveting process, the spring force provided by the spring 142 keeps the upper riveting die 14 pressed against the contacts and rivets, ensuring a close fit and seamless gap between the contacts and rivets, ensuring that the contact assembly meets the metallographic requirements.

[0035] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0036] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed, and the present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A riveting tool for improving the metallographic properties of an AC contactor contact assembly, characterized in that: It includes an upper mold assembly and a lower mold assembly cooperating with the upper mold assembly, the upper mold assembly includes an upper mold fixing plate, a pad and an upper mold stripper plate, the upper mold stripper plate is bolted to an upper rivet mold, a plurality of first mounting holes are provided at the bottom of the upper mold stripper plate, and a second mounting hole corresponding to the first mounting hole is provided at the top of the upper rivet mold, a spring is provided in the first mounting hole, and the other end of the spring extends to the second mounting hole. The upper rivet mold pre-presses the contact assembly during riveting by the elastic force of the spring.

2. The riveting tool for improving the metallographic structure of the AC contactor contact assembly according to claim 1, characterized in that: The number of the first mounting holes, the second mounting holes and the springs is four, and they are evenly distributed on the upper die stripping plate and the upper riveting die respectively.

3. The riveting tool for improving the metallographic structure of the AC contactor contact assembly according to claim 2, characterized in that: The first mounting hole is connected to a first connecting hole, a second connecting hole is provided in the second mounting hole, and the upper mold stripping plate is fixedly connected to the second connecting hole of the upper rivet mold by bolts through the first connecting hole.

4. The riveting tool for improving the metallographic properties of an AC contactor contact assembly according to claim 1, wherein: A die handle is provided on the top of the upper die fixing plate, and the die handle is used for fixed connection with the punch press.

5. The riveting tool for improving the metallographic properties of an AC contactor contact assembly according to claim 1, wherein: The upper rivet die is provided with a first fixing hole, in which an upper rivet die core is provided that extends to above the lower die assembly. Second fixing holes are provided on both sides of the first fixing hole, in which guide columns are provided that extend to above the lower die assembly.

6. The riveting tool for improving the metallographic properties of an AC contactor contact assembly according to claim 1, wherein: The lower die assembly includes a lower die fixing plate, a lower rivet die is fixed on the lower die fixing plate, a communicating hole is provided on the lower rivet die, and a lower rivet die core extending into the communicating hole is fixed on the lower die fixing plate.

7. The riveting tool for improving the metallographic properties of an AC contactor contact assembly according to claim 6, characterized in that: The lower riveting die of the lower die assembly is provided with a guide hole for docking with the guide column.

8. The riveting tool for improving the metallographic properties of the contact assembly of an AC contactor according to claim 7, characterized in that: The lower riveting die is provided with a first profiling groove for fixing the outer shape of the product to be riveted.

9. The riveting tool for improving the metallographic properties of an AC contactor contact assembly according to claim 6, wherein: The lower riveting die core is provided with a second profiling groove for fixing the outer shape of the rivet head to be riveted.

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