Resistance welding process and resistance welding equipment
By forming longitudinal grooves at the end of the conductive core material of the conductor and placing the pins of the thermistor in it, the problem of pin flattening during welding is solved, ensuring the strength and stability of the pins.
Patent Information
- Application Number
- CN202510202557.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-04-01
AI Technical Summary
During the welding process, thermistors are prone to flattening due to high temperature and high pressure, resulting in the reduction of the pin strength after welding and easy breakage.
A longitudinal groove is formed at the end of the conductive core material of the conductor, the pin of the thermistor is placed in the groove, and the pin and the conductive core material are welded together by resistive welding.
By wrapping the pins in the longitudinal grooves, the defect of being flattened during welding is avoided, ensuring that the strength of the thermistor pin does not decrease, and the risk of breakage is avoided.
Smart Images
Figure CN119733930A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a resistance welding process and also to a resistance welding device. Background Art
[0002] Thermistors are a common electronic component that is widely used in electrical automation equipment. Thermistors are welded together with other electronic components (such as wires) by resistance welding. During welding, the pins of the thermistor and the conductive core of the wire are superimposed together. Under the high temperature and high pressure of the resistance welding head, the pins of the thermistor will be partially flattened, resulting in reduced pin strength of the thermistor after welding, and the pins are easily broken during use. Summary of the invention
[0003] The object of the present invention is to provide a resistance welding process, which will not cause the pins of the thermistor to be flattened when welding the thermistor, thereby ensuring that the pin strength of the thermistor will not be reduced.
[0004] In order to achieve the above-mentioned purpose, the resistance welding process of the present invention comprises: forming a longitudinal groove at the end of the conductive core material along the length direction of the conductive wire; placing the pin of the thermistor in the longitudinal groove; and welding the pin of the thermistor and the conductive core material together using a resistance welding head. The resistance welding process of the present invention is used to weld a thermistor and a conductive wire, wherein the thermistor comprises a head and two pins arranged side by side, and the conductive wire comprises a conductive core material and an insulating layer wrapped outside the conductive core material.
[0005] The resistance welding process of the present invention forms a longitudinal groove at the end of the conductive core material of the wire, puts the pin of the thermistor into the longitudinal groove before welding, and then welds the two together by resistance welding. After welding, the pin of the thermistor is wrapped in the longitudinal groove, which avoids the defect that the welded object is flattened under high temperature and high pressure during welding, resulting in reduced strength of the welded object and easy breakage.
[0006] In one embodiment, the resistance welding process further includes: before placing the pins of the thermistor in the longitudinal grooves, separating the pins of the thermistor by a predetermined distance. Separating the pins of the thermistor by a predetermined distance facilitates the simultaneous placement of the two pins in the two longitudinal grooves of the wire.
[0007] In one embodiment, the longitudinal groove is formed at the end of the conductive core material by extrusion.
[0008] The present invention also provides a resistance welding device, the resistance welding device includes a resistance welding head and a wire forming device, the resistance welding head is used to weld thermistors and wires, and the wire forming device is used to form a longitudinal groove at the end of the conductive core material of the wire. The wire forming device further includes a wire clamp and a pressure head, the wire clamp is used to clamp the conductive core material of the wire; at least a portion of the pressure head can extend into the wire clamp and squeeze the end of the conductive core material to form the longitudinal groove at the end of the conductive core material. The resistance welding device of the present invention is used to weld thermistors and wires.
[0009] The wire forming device of the resistance welding equipment of the present invention can form a longitudinal groove at the end of the conductive core material of the wire, and the pin of the thermistor is placed in the longitudinal groove before welding, and then the two are welded together by resistance welding. After welding, the pin of the thermistor is wrapped in the longitudinal groove, which avoids the defect that the welded object is flattened under high temperature and high pressure during welding, resulting in reduced strength of the welded object and easy breakage.
[0010] In one embodiment, the wire clamp includes a left clamp and a right clamp, and the pressure head includes a left pressure head and a right pressure head; at least a portion of the left pressure head can extend into the left clamp, and at least a portion of the right pressure head can extend into the right clamp.
[0011] In one embodiment, the wire shaping device includes a bracket, a hinge assembly, and a driving member, wherein the bracket has a transverse slide rail, and the left clamp or the right clamp can move along the transverse slide rail. The hinge assembly is used to drive the left clamp or the right clamp to move along the transverse slide rail. The driving member is used to drive the hinge assembly to work. The first end of the hinge assembly is pivotally connected to the bracket, the second end is pivotally connected to the left clamp or the right clamp, and the third end is pivotally connected to the driving member.
[0012] In one embodiment, the end of the pressing head has a protrusion, and the protrusion is used to form the longitudinal groove at the end of the conductive core material. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a perspective view of a wire shaping device of a resistance welding apparatus according to one embodiment of the present invention.
[0014] Figure 2 yes Figure 1 A front view of a wire forming device in one state is shown.
[0015] Figure 3 yes Figure 1 A front view of the wire forming device in another state is shown.
[0016] Figure 4 yes Figure 1 A partially enlarged front view of the wire forming device is shown.
[0017] Figure 5 yes Figure 4 A further partially enlarged front view of the wire shaping device is shown.
[0018] Figure 6 This is a three-dimensional view of the wire after being processed by the wire forming device.
[0019] Figure 7 This is a three-dimensional diagram of the processed wire and thermistor combination.
[0020] Figure 8 It is a schematic diagram of the welding wire and thermistor of the resistance welding head of the resistance welding equipment of the present invention. DETAILED DESCRIPTION
[0021] The structure and other aspects of the resistance welding process and resistance welding equipment of the present invention are further described in detail below through specific implementation methods and with reference to the accompanying drawings.
[0022] like Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, the resistance welding device of the present invention is used to weld a thermistor 10 and a wire 20, the thermistor 10 has a head 101 and two pins 102 arranged side by side, and the wire 20 includes a conductive core material 201 and an insulating layer 202 wrapped outside the conductive core material 201. The resistance welding device of the present invention includes a wire forming device 1 and a resistance welding head 2, and the wire forming device 1 is used to form a longitudinal groove 204 at the end of the conductive core material 201 of the wire 20. The longitudinal groove 204 is used to accommodate the pins 102 of the thermistor 10.
[0023] In one embodiment, Figures 1 to 3 As shown, the wire shaping device 1 includes a wire clamp 11 and a pressing head 12. The wire clamp 11 is used to clamp the conductive core material 201 of the wire 20. At least a portion of the pressing head 12 can extend into the wire clamp 11 and press the end of the conductive core material 201 to form a longitudinal groove 204 at the end of the conductive core material 201. In a preferred embodiment, the wire clamp 11 includes a left clamp 11a and a right clamp 11b, and the pressing head 12 includes a left pressing head 12a and a right pressing head 12b. The left pressing head 12a corresponds to the left clamp 11a, and the right pressing head 12b corresponds to the right clamp 11b. When the wire shaping device 1 is working, at least a portion of the left pressing head 12a can extend into the left clamp 11a, and at least a portion of the right pressing head 12b can extend into the right clamp 11b.
[0024] The wire forming device 1 includes a bracket 13 and a spacer 14, and the left clamp 11a and the right clamp 11b are movably mounted on the bracket 13. The spacer 14 is located between the left clamp 11a and the right clamp 11b. Two receiving grooves 14a are formed between the left clamp 11a and the right clamp 11b and the spacer 14, respectively, and the receiving grooves 14a are used to receive the conductive core material 201 of the wire 20. The end of the conductive core material 201 of the wire 20 is placed in the receiving groove 14a and clamped by the left clamp 11a or the right clamp 11b. The bracket 13 has a transverse slide rail 15, and the left clamp 11a or the right clamp 11b can move left and right along the transverse slide rail 15.
[0025] The pressing head 12 is installed above the wire clamp 11. When the pressing head 12 is driven, it can move up and down to approach or move away from the wire clamp 11. After the wire clamp 11 clamps the wire end of the wire 20, at least a portion of the pressing head 12 extends into the receiving groove 14a to press the end of the conductive core material 201 of the wire 20. Preferably, the end of the pressing head 12 has a protrusion 121, and the protrusion 121 can deform the end of the conductive core material 201 to form a longitudinal groove 204 at the end. In a preferred embodiment, the cross-sectional shape of the protrusion 121 is V-shaped.
[0026] The wire shaping device 1 further includes a hinge assembly 16 and a driving member 17. The hinge assembly 16 is two, and drives the left clamp 11a or the right clamp 11b to move respectively. The hinge assembly 16 can apply a thrust or a pull to the left clamp 11a or the right clamp 11b. The driving member 17 is used to drive the hinge assembly 16 to work, and the driving member 17 is, for example, a driving cylinder.
[0027] like Figure 4As shown, for the sake of convenience, this article takes the hinge assembly 16 corresponding to the left clamp 11a as an example for explanation. The hinge assembly 16 further includes a first hinge 161, a second hinge 162 and a third hinge 163. One end 161a of the first hinge 161 is pivoted to the bracket 13, and the end of the first hinge 161 pivoted to the bracket 13 constitutes the first end of the hinge assembly 16. The second hinge 162 is an L-shaped structure with two ends and a right-angle portion. One end 162a (first end) of the second hinge 162 is pivoted to the left clamp 11a, and one end 162a of the second hinge 162 constitutes the second end of the hinge assembly 16, and the other end 162b (second end) is pivoted to the third hinge 163, and the other end 161b of the first hinge 161 is pivoted to the right-angle portion of the second hinge 162. One end 163a of the third hinge 163 is pivotally connected to the other end 162b (second end) of the second hinge 162, and the other end 163b is pivotally connected to the driving member 17. The end where the third hinge 163 is pivotally connected to the driving member 17 constitutes the third end of the hinge assembly 16. When the driving member 17 moves up and down, the left clamp 11a can be pushed or pulled by the hinge assembly 16 to move left and right along the transverse slide rail 15. When the left clamp 11a moves relative to the spacer 14, the width of the accommodating groove 14a between the left clamp 11a and the spacer 14 changes. When the driving member 17 drives the third hinge 163 to move upward, the left clamp 11a moves toward the direction of the spacer 14 to achieve the closure of the left clamp 11a, such as Figure 3 As shown by arrow X. On the contrary, when the driving member 17 drives the third hinge 163 to move downward, the left clamp 11 a moves in a direction away from the spacer 14 to open the left clamp 11 a.
[0028] like Figure 5 As shown in FIG. 1 , when the left clamp 11a is closed, the end of the conductive core material 201 of the wire 20 is clamped in the receiving groove 14a, and the left pressure head 12a moves toward the direction of the wire 20 and extends into the receiving groove 14a under the drive of the driving member 18, as shown in FIG. Figure 5 As shown by arrow Y, the end of the conductive core material 201 is further squeezed to form a longitudinal groove 204 at the end. Figure 6 shown.
[0029] The working mode of the right clamp 11b and the right pressing head 12b is the same as that of the left clamp 11a and the left pressing head 12a, and they work simultaneously.
[0030] like Figure 8 As shown, the resistance welding head 2 includes an upper welding head 21 and a lower welding head 22, and the lower welding head 22 has a welding groove 221 for accommodating the object to be welded. The conductive core material 201 of the wire 20 and the pin 102 of the thermistor 1 combined together are placed in the welding groove 221 waiting for resistance welding.
[0031] The resistance welding process of the present invention is described in detail below. First, a longitudinal groove 204 is formed at the end of the conductive core material 201 of the conductive wire 20 using a wire forming device 1, and then the pin 102 of the thermistor 10 is placed in the longitudinal groove 204, and the pin 102 of the thermistor 10 and the conductive core material 201 of the conductive wire 20 are welded together using a resistance welding head 2. After welding with this welding process, the pin 102 of the thermistor 10 is wrapped by the conductive core material 201 of the conductive wire 20 without being flattened. In a preferred embodiment, before the pin 102 of the thermistor 10 is combined with the conductive core material 201 of the conductive wire 20, the pin 102 of the thermistor 10 is separated by a predetermined distance, such as Figure 7 As shown. Since the distance between the pins 102 of the thermistor 10 and the distance between the longitudinal grooves 204 of the conductive core material 201 of the wire 20 do not match, it is not convenient to place the pins 102 into the longitudinal grooves 204. Therefore, before placing the pins 102, the pins 102 are separated by a predetermined distance so that the two pins 102 can be placed into the longitudinal grooves at the same time.
[0032] The resistance welding process of the present invention forms a longitudinal groove 204 at the end of the conductive core material 201 of the wire 20, puts the pin 102 of the thermistor 10 into the longitudinal groove 204 before welding, and then welds the two together by resistance welding. This welding process can prevent the welded object from being flattened under high temperature and high pressure during welding, resulting in a reduction in the strength of the welded object and easy breakage.
[0033] The above embodiments are only used to illustrate the concept and scope of the present invention, and are not used to limit the protection scope of the present invention. Modifications, equivalent substitutions and other improvements to the above embodiments that are obvious to those skilled in the art are also within the concept of the present invention. The protection scope and concept of the present invention are specifically defined by the claims.
Claims
1. A resistance welding process for welding a thermistor and a wire, wherein the thermistor comprises a head and two pins arranged side by side, and the wire comprises a conductive core material and an insulating layer wrapped around the conductive core material, the resistance welding process comprising: A longitudinal groove is formed at the end of the conductive core material along the length direction of the conductor; placing the pins of the thermistor in the longitudinal groove; Use a resistance soldering tip to solder the thermistor leads and conductive core together.
2. The resistance welding process according to claim 1, characterized in that: The resistance welding process further includes separating the pins of the thermistor by a predetermined distance before placing the pins of the thermistor in the longitudinal grooves.
3. The resistance welding process according to claim 1, characterized in that: The longitudinal groove is formed at the end of the conductive core material by extrusion.
4. A resistance welding device for welding a thermistor and a wire, characterized in that: The resistance welding equipment includes a resistance welding head and a wire forming device, wherein the resistance welding head is used to weld the thermistor and the wire, and the wire forming device is used to form a longitudinal groove at the end of the conductive core material of the wire; The wire forming device further comprises: A conductor clamp is used to clamp the conductive core material of the conductor; as well as A pressing head, at least a portion of which can extend into the wire clamp and press the end of the conductive core material to form the longitudinal groove at the end of the conductive core material.
5. The resistance welding equipment according to claim 4, characterized in that The wire clamp comprises a left clamp and a right clamp, and the pressing head comprises a left pressing head and a right pressing head; at least a part of the left pressing head can extend into the left clamp, and at least a part of the right pressing head can extend into the right clamp.
6. The resistance welding equipment according to claim 5, characterized in that The wire forming device comprises: A bracket, wherein the bracket has a transverse slide rail, and the left clamp or the right clamp can move along the transverse slide rail; A hinge assembly, used for driving the left clamp or the right clamp to move along the transverse slide rail; and A driving member, used for driving the hinge assembly to work; Wherein, the first end of the hinge assembly is pivotally connected to the bracket, the second end is pivotally connected to the left clamp or the right clamp, and the third end is pivotally connected to the driving member.
7. The resistance welding equipment according to claim 6, characterized in that The hinge assembly includes a first hinge, a second hinge and a third hinge, a portion of the first hinge constitutes a first end of the hinge assembly, a portion of the second hinge constitutes a second end of the hinge assembly, and one end of the third hinge constitutes a third end of the hinge assembly.
8. The resistance welding equipment according to claim 7, characterized in that One end of the first hinge is pivotally connected to the bracket, and the other end is pivotally connected to the second hinge; one end of the third hinge is pivotally connected to the driving member, and the other end is pivotally connected to the second end of the second hinge.
9. The resistance welding equipment according to claim 8, characterized in that The second hinge is L-shaped, the second hinge is pivotally connected to the first hinge at a right angle, the first end of the second hinge is pivotally connected to the left clamp or the right clamp, and the second end of the second hinge is pivotally connected to the third hinge.
10. The resistance welding equipment according to claim 5, characterized in that The end of the pressing head has a protrusion, and the protrusion is used to form the longitudinal groove at the end of the conductive core material.