CN107866676B - Integrated punching and welding device and method for electric contacts - Google Patents

Integrated punching and welding device and method for electric contacts Download PDF

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Publication number
CN107866676B
CN107866676B CN201711271259.XA CN201711271259A CN107866676B CN 107866676 B CN107866676 B CN 107866676B CN 201711271259 A CN201711271259 A CN 201711271259A CN 107866676 B CN107866676 B CN 107866676B
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material belt
upper electrode
spot welding
electric contact
punched
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CN107866676A (en
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王蕾
陈家帆
陈晓
祁更新
吴新合
王根虎
孙增耀
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Wenzhou Hongfeng Electrical Alloy Co Ltd
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Wenzhou Hongfeng Electrical Alloy Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/04Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture Of Switches (AREA)

Abstract

The invention discloses a punching and welding integrated device and a method for an electrical contact, wherein the device comprises the following components: the device comprises a feeding mechanism, a blanking mechanism, a stamping mechanism, a conveying mechanism, a supporting part, a positioning part, an upper electrode and a lower electrode. The method comprises the steps of firstly punching a material belt, cutting silver wires, conveying the pre-punched material belt and the cut silver points to a spot welding position, and finally electrifying to finish spot welding, wherein a cutting mechanism and a punching mechanism process the silver wires and the material belt into an electric contact and a pre-punched material belt. The conveying mechanism conveys the electric contact and the punched material belt to the spot welding position. The positioning mechanism enables the electric contact to be in close contact with the material belt. The invention can obtain the impact welding integrated electric contact component with excellent welding quality and matched sizes of all elements of the electric contact, the method and the device related by the invention are suitable for various electric contacts with complex shapes, the welding speed is greatly improved, and the production cost is greatly reduced.

Description

Stamping and welding integrated device and method for electric contact
Technical Field
The invention relates to a forming device and a forming method of an electric contact, in particular to a stamping and welding integrated device and a stamping and welding integrated method of an electric contact, and finally a stamping and welding integrated product is obtained.
Background
The electric contact component is used as a core element in the switching electric appliance, plays roles in breaking and conducting current, and the quality of welding plays a determining role in the on-off capacity, arc burning resistance, service life, running safety and reliability and the like of the whole electric appliance.
The electrical contacts often need to be punched, fed, etc. before being soldered to form the assembly. At present, a plurality of manufacturers independently produce and process each element, and a plurality of operations cause the problems of product size matching and secondary pollution, so that the quality stability and consistency of the electric contact assembly products are reduced. Meanwhile, the consistency of the quality of the electrical contact is seriously affected by different stamping and welding processes and different use environments.
Therefore, a set of integrated production equipment and method for organically combining material stamping, automatic feeding and assembly welding are designed, which are the problems to be solved urgently in the electrical appliance industry and are the preconditions for further expanding the application of the electrical appliance industry.
Through searching, the Chinese patent No. 201510320597.2 discloses that a plate part is placed in a female die in advance, another plate part is placed on the upper surface of the plate part, then current is loaded and electrified on the premise of not taking out a stamped part, and the resistance spot welding of the automobile plate part is realized. However, the device is only suitable for the condition that the shape of the to-be-welded part is regular, once the shape of the to-be-welded part is complex and irregular, the difficulty of preparing the female die and the difficulty of coordinating the matched electrode with the female die are greatly increased, the cost is increased, and the application of the impact welding integrated product is limited to a certain extent.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides a punching and welding integrated device and a method for an electric contact, which are used for punching a material belt into a punching part, cutting wires and processing the wires into the electric contact, the electrical contact and the punching are welded together, and the three procedures are integrated on one piece of equipment, so that a punching and welding integrated electrical contact assembly product is obtained.
The invention fully considers the influence of multiple target factors in the preparation process of the electric contact assembly product, and solves the problems of poor consistency of welding quality, mismatching of sizes of various elements of the electric contact, low universality of the existing integrated equipment and the like of the existing electric contact assembly.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
According to a first aspect of the invention, there is provided a stamping and welding integrated device for an electrical contact, comprising a feeding mechanism, a blanking mechanism, a stamping mechanism, a conveying mechanism, a supporting component, a positioning component, an upper electrode and a lower electrode, wherein:
the feeding mechanism is used for conveying silver wires to a cutting position;
the cutting mechanism is used for cutting the silver wires conveyed by the feeding mechanism into electrical contacts and pushing the cut electrical contacts to a spot welding position through the feeding mechanism;
The stamping mechanism is positioned in an unwelded area of the material belt and is used for stamping the material belt into a required shape;
the conveying mechanism is used for conveying the punched material belt of the punching mechanism to a spot welding position;
The supporting part, the positioning part, the upper electrode and the lower electrode are positioned on four sides of the punched material belt, the four sides are parallel to the conveying direction of the material belt, the electric contact positioned at the spot welding position is tightly contacted with the punched material belt through the cooperation of the four parts, and the lower electrode and the upper electrode conduct current to finish spot welding.
Preferably, a channel for conveying the silver wires is arranged in the feeding mechanism and is parallel to the surface to be soldered of the electrical contact.
More preferably, the cutting mechanism adopts a cutter which is perpendicular to a channel for conveying the silver wires in the feeding mechanism.
Preferably, the device further comprises a connecting mechanism, the upper electrode is assembled at one end of the connecting mechanism, the connecting mechanism drives the upper electrode to press the electric contact at the spot welding position, so that the electric contact is in close contact with the punched material belt, and the working surface of the upper electrode is parallel to the surface to be welded of the electric contact.
Preferably, the upper electrode corresponds to the position of the supporting member, the lower electrode corresponds to the position of the positioning member, and the upper electrode is located above the lower electrode.
Preferably, the driving mechanism is formed by a roller, and the punched material belt is placed on the roller and driven to a spot welding position.
Preferably, the upper electrode is a gear type upper electrode.
Preferably, the support member, the positioning member, the upper electrode, and the lower electrode are located on four sides of the punched tape, and the four sides are all parallel to the tape conveying direction.
Preferably, the punching mechanism is located in an unwelded region of the web.
According to a second aspect of the invention, there is provided a method for integrating stamping and welding of an electrical contact, wherein a material strip is used as a stamping object, silver wires are used as blanking objects, the material strip is stamped and cut off, the pre-stamped material strip and the cut silver wires are conveyed to a spot welding position, and finally spot welding is completed by electrifying.
Specifically, the method comprises the following steps:
firstly, stamping a material belt into a required shape, and cutting off silver wires into electrical contacts;
secondly, conveying the punched material belt and the electrical contact to a spot welding position, and fixing the punched material belt and the electrical contact;
And the electric contact is tightly contacted with the punched material belt through the cooperation among the supporting part, the positioning part, the upper electrode and the lower electrode, and the upper electrode and the lower electrode are electrified to finish the spot welding action.
Preferably, the stamping of the material strip into the desired shape means that the material strip is conveyed to the stamping position of the stamping mechanism by the roller of the stamping mechanism, and the stamping mechanism stamps the material strip into the desired shape.
Preferably, the silver wire is cut into the electrical contact, namely the silver wire is conveyed to a cutting position along with a feeding mechanism, and a cutting knife cuts the silver wire into silver points, namely the electrical contact.
Preferably, the conveying of the material belt and the electrical contact to the spot welding position means that the pre-punched material belt is conveyed to the spot welding position by a roller, and the electrical contact is pushed to the spot welding position by a feeding mechanism;
preferably, the fixed material belt and the electric contact means that the positioning plate presses the material belt to enable the material belt to abut against the lower electrode, the connecting mechanism is connected with the upper electrode, the connecting mechanism drives the upper electrode to press the electric contact at the spot welding position, so that the electric contact is tightly contacted with the material belt, and the material belt is supported and limited by the supporting seat.
Preferably, the energizing of the upper electrode and the lower electrode means that the spot welding action is completed by conducting current to the lower electrode and the upper electrode, and finally, the integral product of the impact welding is obtained.
The working principle of the punching and welding integrated device and method is that the blanking knife cuts off silver wires into electrical contacts, and the stamping mechanism stamps the material strips into required shapes. The feeding mechanism conveys silver wires to a blanking position and then pushes the cut electrical contacts to a spot welding position. The rollers transport the punched strip to the spot welding position. The lower electrode corresponds to the positioning plate in position, the upper electrode corresponds to the support seat, the positioning plate presses the lower electrode, and the connecting mechanism drives the upper electrode to press the support seat, so that the electric contact is in close contact with the punched material belt.
Compared with the prior art, the invention has the following beneficial effects:
1. the traditional production process is that each element is independently produced and processed, and the problem of product size matching and secondary pollution easily occur in multiple operations, so that the quality stability and consistency of the component products are poor. Compared with the traditional method, the invention integrates a plurality of working procedures such as punching, cutting off, welding and the like into an integrated process, is not influenced by the matching of the sizes of accessories, greatly reduces secondary pollution of elements, and effectively improves the stability and consistency of the quality of the assembly.
2. Compared with the traditional method and device, the invention shortens the processing link, improves the production efficiency, reduces the occupied area of equipment and the number of operators, and reduces the production cost.
3. Furthermore, compared with the existing integrated equipment, the device is not limited by the shape of the piece to be welded, can be matched with the electrode according to various modes of components with different shapes, and has wide application range and good universality.
In conclusion, the invention can obtain the impact welding integrated electric contact assembly with excellent welding quality and matched sizes of all elements of the electric contact, is applicable to various electric contacts with complex shapes, greatly improves the welding speed, greatly reduces the production cost and has obvious economic benefit.
Drawings
FIG. 1a is a schematic view of an integrated apparatus for impact soldering of electrical contacts in accordance with one embodiment of the present invention;
The device comprises a silver wire 101, a material cutter 102, a lower electrode 103, a feeding mechanism 104, a material belt 105, a connecting mechanism 106, an upper electrode 107, an electric contact (silver point) 108, a positioning plate 109, a supporting seat 110, a 111-stamping mechanism and a 113-pressure mechanism.
FIG. 1b is a schematic cross-sectional view of a spot welding location in a flash integrated device in accordance with an embodiment of the present invention;
Wherein, 103-lower electrode, 105-material belt, 107-upper electrode, 108-electric contact, 109-locating plate and 112-the surface to be welded of electric contact.
FIG. 2 is a diagram of a punch-welded integrated product according to an embodiment of the present invention;
wherein 201-electrical contacts, 202-punched strips.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
As shown in fig. 1a, 1b and 2, in the following embodiments of the present invention, there is provided a stamping and welding integrated device for AgCu 3/CuNi18Zn20 electrical contacts, which includes a blanking blade 102, a lower electrode 103, a feeding mechanism 104, a connecting mechanism 106, a gear-type upper electrode 107, a positioning plate 109, a supporting base 110, a stamping mechanism 111 and a conveying mechanism. Wherein:
The feeding mechanism 104 is used for conveying the silver wires 101 to a cutting position;
The cutter 102 is used for cutting the silver wire 101 conveyed by the feeding mechanism 104 into an electrical contact 108 and pushing the cut electrical contact 108 to a spot welding position through the feeding mechanism 104;
the punching mechanism 111 is located in an unwelded area of the material belt 105 and is used for punching the material belt 105 into a required shape;
the conveying mechanism is used for conveying the punched material belt of the punching mechanism 111 to a spot welding position;
The support seat 110, the positioning plate 109, the gear-type upper electrode 107 and the lower electrode 103 are positioned on four sides of the punched material belt, the four sides are parallel to the conveying direction of the material belt, the electric contact positioned at the spot welding position is tightly contacted with the punched material belt through the cooperation of the four parts, and the lower electrode 103 and the upper electrode 07 conduct current to finish spot welding.
In the above device, the supporting seat 110 is used for supporting the material belt so that the material belt does not move in the plane of the material belt. Also shown in fig. 1a is a pressure mechanism 113, and the connecting mechanism 106 of fig. 1a is used to connect the pressure mechanism 113 and the upper electrode 107, so that the upper electrode 107 and the pressure mechanism 113 are assembled together, and thus, when welding, the pressure of the electrode on the product can be changed by adjusting the pressure of the pressure mechanism 113, thereby changing the pressure required for welding.
In a preferred embodiment, the drive mechanism is formed by a roller on which the punched strip is placed and driven to a spot welding position.
In some embodiments, the feeding mechanism 104 has a channel for conveying the AgCu 3 silver wire 101, and the channel is parallel to the surface to be soldered 112 of the AgCu 3 silver point 108.
The cutter 102 is perpendicular to a channel for conveying the AgCu 3 silver wire 101 inside the feeding mechanism 104.
In some embodiments, the gear-type upper electrode 107 is mounted on one end of the connection mechanism 106, and the working surface of the gear-type upper electrode 107 is parallel to the surface to be soldered 112 of the AgCu 3 silver point 108. The gear electrode 107 is adopted, and one of the functions is to replace a cylindrical electrode for spot welding, when in resistance welding, the gear electrode 107 generates heat at the teeth close to the electric contact 118, and when in repeated welding, thermal fatigue is generated, so that the welding performance of a product is not benefited; the gear type upper electrode 107 has the advantages that the gear type upper electrode 107 is not required to be machined into a heat dissipation water tank like a traditional cylindrical electrode, the electrode can be replaced more conveniently in the automatic welding process, the surface area is increased due to the fact that the gear type upper electrode 107 is manufactured, heat dissipation and heat conduction during welding are facilitated, and the welding performance of products is improved.
In some embodiments, the gear-type upper electrode 107 corresponds to the position of the supporting seat 110, the lower electrode 103 corresponds to the position of the positioning plate 109, and is respectively located on four sides of the punched CuNi 18Zn20 material belt 105, and the four sides are parallel to the conveying direction 113 of the CuNi 18Zn20 material belt 105.
The gear type upper electrode 107 corresponds to the position of the supporting seat 110, the lower electrode 103 corresponds to the position of the positioning plate 109, and the gear type upper electrode 107 is located above the lower electrode 103.
In the operation of this embodiment, the positioning plate 109 is pressed against the lower electrode 103, the gear-type upper electrode 107 is pressed against the supporting seat 110, so that the electrical contact is brought into close contact with the punched tape, and the lower electrode 103 and the gear-type upper electrode 107 conduct current to complete spot welding. Of course, in other embodiments, the positions of the above-mentioned parts may be adjusted, so long as the four parts on the four sides of the punched material strip can make the electric contacts at the spot welding position closely contact with the punched material strip, and the conducting current of the lower electrode 103 and the upper electrode 07 completes spot welding, thereby achieving the object of the present invention.
The punching mechanism 111 is located in the unwelded region of the CuNi 18Zn20 strip 105.
The working principle of the punching and welding integrated device is that the blanking knife 102 cuts the AgCu 3 silver wire 101 wire into AgCu 3 silver points 108, and the punching mechanism 111 punches the CuNi 18Zn20 material belt 105 into a required shape. The feed mechanism 104 delivers the AgCu 3 silver wire 101 to the blanking position and then pushes the AgCu 3 silver spot 108 to the spot welding position. The rollers transport the punched CuNi 18Zn20 strip 105 to the spot welding position. The lower electrode 103 corresponds to the positioning plate 109 in position, the gear-type upper electrode 107 corresponds to the supporting seat 110 in position, the positioning plate 109 presses the lower electrode 103, and the connecting mechanism 106 drives the gear-type upper electrode 107 to press the supporting seat 110, so that the AgCu 3 silver points 108 are tightly contacted with the punched CuNi 18Zn20 material belt 105.
The above description is only a part of the preferred embodiments of the device according to the present invention, and in other embodiments, the blanking mechanism, the feeding mechanism, the connecting mechanism, the upper electrode, the positioning member, the supporting member, the conveying mechanism, etc. may take other forms, and are not limited to the above embodiments of the present invention and the structures in the drawings.
Based on the device, the following provides a stamping and welding integrated method for realizing the AgCu 3/CuNi18Zn20 electrical contact, and the specific implementation process is as follows:
As shown in fig. 1 and 2, the CuNi 18Zn20 strip 105 is used as a punching object, meanwhile, the AgCu 3 silver wire 101 is used as a blanking object, the CuNi 18Zn20 strip 105 is punched first, the AgCu 3 silver wire 101 is cut off, and then the pre-punched CuNi 18Zn20 strip 105 and the cut AgCu 3 silver dots 108 are conveyed to a spot welding position to finish spot welding.
Firstly, punching a CuNi 18Zn20 material belt 105 into a required shape, and cutting off an AgCu 3 silver wire 101 into an AgCu 3 silver point 108;
The pressing of the CuNi 18Zn20 material strip 105 into the desired shape means that the CuNi 18Zn20 material strip 105 is transported to the pressing position of the pressing mechanism 111 by the roller in the pressing mechanism 111, and the pressing mechanism 111 presses the material strip 105 into the desired shape.
The cutting of the AgCu 3 silver wire 101 into the AgCu 3 silver point 108 means that the AgCu 3 silver wire 101 is conveyed to a cutting position along with the feeding mechanism 104, and the cutting knife 102 cuts the AgCu 3 silver wire 101 into the AgCu 3 silver point 108.
And secondly, conveying the CuNi 18Zn20 material belt 105 and the AgCu 3 silver points 108 to a spot welding position, and fixing the CuNi 18Zn20 material belt 105 and the AgCu 3 silver points 108.
The pre-punched CuNi 18Zn20 material belt 105 is conveyed to a spot welding position by a roller in a punching mechanism 111, and the AgCu 3 silver point 108 is pushed to the spot welding position by a feeding mechanism 104;
The positioning plate 109 presses the CuNi 18Zn20 strip 105 so that the CuNi 18Zn20 strip 105 abuts against the lower electrode 103;
the connecting mechanism 106 is connected with the gear-type upper electrode 107, and the connecting mechanism 106 drives the gear-type upper electrode 107 to press the AgCu 3 silver point 108 at the spot welding position, so that the AgCu 3 silver point 108 is in close contact with the CuNi 18Zn20 material belt 105.
And thirdly, arranging the supporting seat 110, the positioning plate 109, the gear-type upper electrode 107 and the lower electrode 103 on four sides of the punched material belt, wherein the four sides are parallel to the conveying direction of the material belt, and tightly contacting the electric contact with the punched material belt through the cooperation among the supporting seat 110, the positioning plate 109, the gear-type upper electrode 107 and the lower electrode 103 to electrify the gear-type upper electrode 107 and the lower electrode 103 so as to finish the spot welding action.
In the embodiment, the upper electrode and the lower electrode are electrified to complete the spot welding action, namely the lower electrode 103 is used as the negative electrode of an external circuit, the gear-type upper electrode 107 is used as the positive electrode of the external circuit, and the current is applied to the two ends of the lower electrode 103 and the gear-type upper electrode 107 to complete the spot welding action, so that a spot welding integrated product is finally obtained, and the product is shown in a real object of FIG. 2.
The AgCu 3/CuNi18Zn20 electric contact assembly processed by the method and the device can weld 45 products per minute, the minimum size of the weldable silver point is close to 0.8mm, the product quality is obviously improved, and the method and the device have obvious economic benefits.
It should be understood that the shape of the electrical contact, the position of the electrode, etc. in the above embodiments may be adjusted within the scope of the present invention, which is easily achieved by those skilled in the art on the basis of the description of the present invention, and thus will not be repeated.
In the above description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in simplifying the description of the present invention, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
While the invention has been described by way of example with reference to the accompanying drawings, it will be apparent that the invention is not limited to the specific embodiments described above, but is intended to cover modifications, equivalents and improvements, etc., within the spirit and principles of the invention, or applications without modification, in other places.

Claims (7)

1. The punching and welding integrated device for the electrical contact is characterized by comprising a feeding mechanism, a blanking mechanism, a punching mechanism, a conveying mechanism, a supporting part, a positioning part, an upper electrode and a lower electrode, wherein:
the feeding mechanism is used for conveying silver wires to a cutting position;
the cutting mechanism is used for cutting the silver wires conveyed by the feeding mechanism into electrical contacts and pushing the cut electrical contacts to a spot welding position through the feeding mechanism;
The stamping mechanism is positioned in an unwelded area of the material belt and is used for stamping the material belt into a required shape;
the conveying mechanism is used for conveying the punched material belt of the punching mechanism to a spot welding position;
The supporting part, the positioning part, the upper electrode and the lower electrode are positioned on four sides of the punched material belt, the four sides are parallel to the conveying direction of the material belt, the electric contact positioned at the spot welding position is tightly contacted with the punched material belt through the cooperation of the four parts, and the lower electrode and the upper electrode conduct current to finish spot welding;
The device further comprises a connecting mechanism, wherein the upper electrode is assembled at one end of the connecting mechanism, the connecting mechanism drives the upper electrode to press against an electric contact at a spot welding position, so that the electric contact is in close contact with the punched material belt, and the working surface of the upper electrode is parallel to the surface to be welded of the electric contact;
the upper electrode is a gear type upper electrode, the upper electrode corresponds to the supporting part in position, the lower electrode corresponds to the positioning part in position, and the upper electrode is located above the lower electrode.
2. The integrated device for impact welding of electrical contacts according to claim 1, wherein a channel for conveying the silver wires is arranged in the feeding mechanism and is parallel to a surface to be welded of the electrical contacts.
3. The integrated device for impact welding of electrical contacts according to claim 2, wherein the cutting mechanism comprises a cutter perpendicular to a channel in the feeding mechanism for transporting the silver wire.
4. A device according to any one of claims 1 to 3, wherein the conveying means is constituted by a roller on which the punched strip is placed and driven into the spot-welding position.
5. A method for integrating the impact welding of an electrical contact, which adopts the impact welding integrated device of the electrical contact as set forth in any one of claims 1 to 4, and is characterized by comprising the following steps:
firstly, stamping a material belt into a required shape, and cutting off silver wires into electrical contacts;
secondly, conveying the punched material belt and the electrical contact to a spot welding position, and fixing the punched material belt and the electrical contact;
And the electric contact is tightly contacted with the punched material belt through the cooperation among the supporting part, the positioning part, the upper electrode and the lower electrode, and the upper electrode and the lower electrode are electrified to finish the spot welding action.
6. The method of integrating electrical contacts according to claim 5, wherein in the first step, one or more of the following features are provided:
-the stamping of the material web into the desired shape means that the material web is transported by the transport means to the stamping position of the stamping means, which stamps the material web into the desired shape;
the cutting of the silver wire into electrical contacts means that the silver wire is conveyed to a cutting position along with a feeding mechanism, and a cutting knife cuts the silver wire into silver points, namely the electrical contacts.
7. A method for integrating the stamping and welding of an electrical contact according to claim 5 or 6, wherein the method comprises one or more of the following characteristics:
-said fixed strip and electrical contacts means that the positioning member is pressed against said punched strip such that said punched strip abuts against said lower electrode; the connecting mechanism is connected with the upper electrode, and drives the upper electrode to press the electric contact at the spot welding position, so that the electric contact is in close contact with the punched material belt;
Energizing the upper and lower electrodes means that the spot welding action is accomplished by applying a current across the lower and upper electrodes.
CN201711271259.XA 2017-12-05 2017-12-05 Integrated punching and welding device and method for electric contacts Active CN107866676B (en)

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CN207606521U (en) * 2017-12-05 2018-07-13 温州宏丰电工合金股份有限公司 Electrical contact rushes welding integrated device

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