Welding method of spring

Abstract

The invention discloses a welding method of a spring. The welding method comprises the steps that a welding section, used for welding, of the spring is embedded into a containing space of an object, and the containing space is in a spiral shape matched with the spring; and the welding section and the object are fixed through laser welding, and the center of a welding spot of laser welding is close to the object or located on the object. The welding section of the spring is embedded into the spiral containing space of the object, so that the spring can be tightly matched with the object, and the welding stability and strength are improved; meanwhile, the center of the welding spot is close to or located on the object, it can be guaranteed that stress distribution of a welding area is more uniform, the stress concentration phenomenon possibly occurring in the welding process is reduced, and therefore the strength of a welding joint and the stability of the overall structure are improved, heat damage to the spring is reduced, and the integrity and mechanical performance of the spring are kept.

Description

Technical Field

[0001] The invention belongs to the technical field of metal welding, and in particular relates to a spring welding method. Background Art

[0002] Laser welding is an efficient and precise welding method using high-energy laser beams. Due to its unique advantages, it has been successfully used in the precision welding of micro and small parts.

[0003] When the spring wire is very thin, it is easy for the spring wire to be melted during the laser welding process. Even if it is not melted, the tensile force that the spring wire can withstand at the center of the weld point will be greatly reduced due to the damage. When subjected to tensile load, it is easy to break. The reduction of the spring wire diameter and the welding difficulty increase exponentially. The same problem will occur in the welding of thin-walled tubes, micro springs and tubes, and the welding between thick wire diameter springs and small wire diameter springs. Summary of the invention

[0004] The purpose of the present disclosure is to provide a spring welding method, which can solve at least part of the above technical problems.

[0005] A first aspect of an embodiment of the present disclosure provides a spring welding method for welding the spring to a tubular or cylindrical object; the welding method comprises: The welding section of the spring used for welding is embedded into the receiving space of the object, wherein the receiving space is in a spiral shape adapted to the spring; The welding section and the object are fixed by laser welding, wherein the center of the welding point of the laser welding is close to the object or located on the object.

[0006] The main technical effects achieved by the embodiments of the present disclosure are: by embedding the spring welding section into the spiral accommodating space of the object, a close fit between the spring and the object can be achieved, thereby improving the stability and strength of the welding; at the same time, the center of the weld is close to or located on the object, which can ensure that the stress distribution in the welding area is more uniform, reducing the stress concentration phenomenon that may occur during the welding process, thereby improving the strength of the welded joint and the stability of the overall structure, reducing thermal damage to the spring, and maintaining the integrity and mechanical properties of the spring.

[0007] Optionally, there is a gap between the welding section and the object, the gap overlaps with the accommodating space, and the center of the laser welding weld is located in the middle of the gap or in a region of the gap that is biased towards the object.

[0008] The main technical effect achieved by the embodiment of the present disclosure is: a gap is left between the welding section and the object, and the center of the welding point is located in the middle of the gap or biased towards the object area. This can ensure uniform heat distribution during welding, reduce local overheating of the spring, avoid spring wire melting, and improve welding quality.

[0009] Optionally, the welding section comprises a plurality of spring spirals connected in sequence and spaced apart, wherein in the axial direction of the spring and pointing towards the object, the spring spiral has a first side and a second side on both sides in sequence, wherein at least the second side is welded and fixed to the object.

[0010] The main technical effect achieved by the embodiment of the present disclosure is that the welding section is designed as a plurality of spring spirals, and at least the second side is welded and fixed to the object. Such a design can disperse the stress during the welding process, reduce the burden on a single welding point, and improve the stability and strength of the overall connection.

[0011] Optionally, the second side is fixed to the object by welding, and the first side is not fixed to the object by welding.

[0012] Optionally, the gap / groove as the accommodating space of the object is axially open and points in the direction of the object, and includes a starting section, a middle section and an end section; The center of the welding spot of the last section is located in the middle of the gap between the spring and the welding object, and the center of the welding spot of the starting section is located in the area where the gap deviates toward the object.

[0013] The end section is welded on the second side, the start section is welded on the first side, and the middle section is not welded.

[0014] The main technical effect achieved by the embodiment of the present disclosure is: the last section is welded on the second side, the starting section is welded on the first side, and the middle section is not welded. This design allows the spring to maintain a certain degree of freedom on one side, so that it can absorb impact when subjected to external force, thereby improving the impact resistance of the connection.

[0015] Optionally, the second side is fixed to the object by welding, and the first side is also fixed to the object by welding.

[0016] The main technical effect achieved by the embodiment of the present disclosure is that both the first side and the second side are welded and fixed to the object. This design provides all-round fixation and is suitable for application scenarios that require high stability and high-strength connections, ensuring the reliability of the connection.

[0017] Optionally, the object includes a cylinder; the accommodating space includes a groove arranged on the outer surface of the cylinder, the groove is spiral and open, and the open end of the groove is located at one end of the cylinder close to the spring.

[0018] The main technical effect achieved by the embodiment of the present disclosure is: a spiral groove is provided on the outer surface of the cylinder, so that the welding section can be embedded in the groove, thereby achieving a close fit between the cylinder and the spring, and improving the accuracy of welding and the reliability of connection.

[0019] Optionally, the object includes a shaft body; the accommodating space includes a groove arranged on the outer surface of the shaft body, the groove is spiral and has an opening at one end, and the open end of the groove is located at one end of the shaft body close to the spring.

[0020] The main technical effect achieved by the embodiment of the present disclosure is that by arranging a spiral groove on the outer surface of the shaft body, a close fit and welding between the shaft body and the spring can be achieved, thereby improving the stability and reliability of the connection.

[0021] Optionally, along the direction from the opening end of the groove to the other end, the width of the groove gradually approaches the diameter of the spring wire.

[0022] The main technical effect achieved by the embodiment of the present disclosure is: the design of the groove width gradually approaching the spring wire diameter allows the welding section to be more tightly embedded in the groove, enhancing the stability of the welding and the strength of the connection, while reducing the gap during the welding process and improving the welding quality.

[0023] Optionally, the object comprises a plurality of spring spiral rings which are sequentially connected and spaced apart; the accommodating space comprises the gaps between the plurality of spring spiral rings and / or the concave portions formed by the tight fit of the filamentary spirals.

[0024] The main technical effect achieved by the embodiments of the present disclosure is: utilizing the gaps between the spring spiral rings and / or the recessed portions formed by the tight fit of the filamentary spirals as accommodation spaces, thereby achieving close fitting and welding between springs of different types / sizes, and improving the strength and stability of the connection.

[0025] Optionally, during the welding process of the spring, a connecting rod is inserted into the spring and / or the object, wherein the diameter of the connecting rod is equal to the smaller one of the inner diameter of the spring and the inner diameter of the object.

[0026] The main technical effect achieved by the embodiment of the present disclosure is that during the welding process, the connecting rod is inserted into the spring and the object, which can ensure the coaxiality of the spring and the object during the welding process, and improve the accuracy and stability of the welding. The diameter of the connecting rod is selected to be the smaller of the inner diameter of the spring and the inner diameter of the object to ensure that it can be smoothly passed through and fixed, reducing damage to the spring during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a method for welding a spring and a pipe in an embodiment of the present disclosure Figure 1 ; Figure 2 It is a schematic diagram of a method for welding a spring and a shaft body in one embodiment of the present disclosure; Figure 3 A schematic diagram of a method for welding a spring and a pipe in an embodiment of the present disclosure Figure 2 ; Figure 4 A schematic diagram of a method for welding a spring and a spring member in an embodiment of the present disclosure Figure 1 ; Figure 5 A schematic diagram of a method for welding a spring and a spring member in an embodiment of the present disclosure Figure 2 ; Figure 6 A schematic diagram of an object in an embodiment of the present disclosure Figure 1 ; Figure 7 A schematic diagram of an object in an embodiment of the present disclosure Figure 2 ; Figure 8 A schematic diagram of an object in an embodiment of the present disclosure Figure 3 .

[0028] Explanation of the reference numerals: 1. spring; 10. welding part; 2. object; 20. accommodation space; 3. connecting rod. DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The modes described in the following exemplary embodiments do not represent all modes consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0030] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limitation, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "an", "the" and "the" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] like Figure 1-5 As shown, the first aspect of the embodiment of the present disclosure provides a welding method of a spring 1, which is used to weld the spring 1 to a tubular or cylindrical object 2; the welding method comprises: The welding section of the spring 1 used for welding is embedded in the accommodating space 20 of the object 2, and the accommodating space 20 is in a spiral shape adapted to the spring 1; by embedding the welding section of the spring 1 into the spiral accommodating space 20 of the object 2, a close fit between the spring 1 and the object 2 can be achieved, thereby improving the stability and strength of the welding.

[0032] The welding section is fixed to the object 2 by laser welding, wherein the center of the laser welding spot is close to or located on the object 2. The center of the welding spot is close to or located on the object 2, which can ensure that the stress distribution in the welding area is more uniform, reduce the stress concentration on the relatively fragile spring wire that may occur during the welding process, thereby improving the strength of the welded joint and the stability of the overall structure, and reducing the thermal damage to the spring 1, maintaining the integrity and performance of the spring 1.

[0033] As an optional embodiment, there is a gap between the welding section and the object 2, the gap overlaps with the accommodating space 20, and the center of the laser welding spot is located in the middle of the gap or in the area where the gap is biased towards the object 2. A gap is left between the welding section and the object 2, and the center of the welding spot is located in the middle of the gap or in the area biased towards the object 2, which can ensure uniform heat distribution during welding, reduce local overheating of the spring 1, avoid melting of the spring 1 wire, and improve welding quality.

[0034] As an optional embodiment, the welding section includes a plurality of spring spirals connected in sequence and spaced apart, and in the axial direction of the spring 1 and in the direction pointing to the object 2, the two sides of the spring spiral have a first side and a second side in sequence, wherein at least the second side is welded and fixed to the object 2. The welding section is designed as a plurality of spring spirals, and at least the second side is welded and fixed to the object 2. Such a design can disperse the stress during the welding process, reduce the burden of a single welding point, and improve the stability and strength of the overall connection.

[0035] As an optional implementation, the second side is fixed to the object 2 by welding, and the first side is not fixed to the object 2 by welding.

[0036] As an optional embodiment, the object 2 is a gap / groove 20 as a receiving space, which is open in the axial direction and points in the direction of the object, and includes a starting section, a middle section and a final section; the center of the welding point of the final section is located in the middle of the gap between the spring 1 and the welded object 2, and the center of the welding point of the starting section is located in the area where the gap is biased toward the object 2. The final section is welded on the second side, the starting section is welded on the first side, and the middle section is not welded. One side is welded and fixed to the object 2, while the other side is not welded and fixed. This design allows the spring 1 to maintain a certain degree of freedom on one side, so that it can absorb impact when subjected to external force, thereby improving the impact resistance of the connection.

[0037] As an optional implementation, the second side is welded and fixed to the object 2, and the first side is welded and fixed to the object 2. Both the first side and the second side are welded and fixed to the object 2. This design provides all-round fixation and is suitable for application scenarios requiring high stability and high-strength connection to ensure the reliability of the connection.

[0038] As an optional embodiment, the object 2 includes a cylinder; the accommodating space 20 includes a groove arranged on the outer surface of the cylinder, the groove is spiral and open, and the open end of the groove is located at one end of the cylinder close to the spring 1. The spiral groove is arranged on the outer surface of the cylinder, so that the welding section can be embedded in the groove, so as to achieve a close fit between the cylinder and the spring 1, and improve the accuracy of welding and the reliability of connection.

[0039] As an optional embodiment, the object 2 includes a shaft body; the accommodating space 20 includes a groove arranged on the outer surface of the shaft body, the groove is spiral and one end is open, and the open end of the groove is located at the end of the shaft body close to the spring 1. By arranging the spiral groove on the outer surface of the shaft body, the shaft body and the spring 1 can be closely matched and welded, thereby improving the stability and reliability of the connection.

[0040] As an optional embodiment, the width of the groove gradually approaches the spring wire diameter along the direction from the open end of the groove to the other end. The design of the groove width gradually approaching the spring wire diameter allows the welding section to be more tightly embedded in the groove, thereby enhancing the stability of the welding and the strength of the connection, while reducing the gap during the welding process and improving the welding quality.

[0041] As an optional embodiment, the object 2 includes a plurality of spring spiral rings connected in sequence and spaced apart; the accommodation space 20 includes the gaps between the plurality of spring spiral rings. By designing the object 2 as a plurality of spring spiral rings and using the gaps between the spring spiral rings as the accommodation space 20, a close fit and welding between the springs 1 can be achieved, thereby improving the strength and stability of the connection.

[0042] As an optional embodiment, during the welding process of the spring 1, the connecting rod 3 is inserted into the spring 1 and / or the object 2, wherein the diameter of the connecting rod 3 is equal to the smaller of the inner diameter of the spring 1 and the inner diameter of the object 2. During the welding process, the connecting rod 3 is inserted into the spring 1 and the object 2 to ensure the coaxiality of the spring 1 and the object 2 during the welding process, and improve the accuracy and stability of the welding. The diameter of the connecting rod 3 is selected to be the smaller of the inner diameter of the spring 1 and the inner diameter of the object 2 to ensure that it can be smoothly passed through and fixed, reducing damage to the spring 1 during the welding process.

[0043] The technical solution of the present invention will be further described below in conjunction with specific embodiments. Example 1

[0044] like Figure 1 As shown, in this embodiment, the spring 1 is welded to the pipe material, that is, the object 2. The wire diameter of the spring 1 does not exceed 2 mm, and in this embodiment, the wire diameter of the spring 1 is 0.05 mm.

[0045] The welding steps of spring 1 and pipe are as follows: A spiral groove adapted to the spring 1 is cut on the tube as the accommodating space 20, wherein the starting end of the groove is open and located at the end of the groove close to the spring 1, and the width of the starting end of the groove is 0.04mm, and the width of the groove gradually approaches the spring wire diameter along the direction from the starting end of the groove to the end, and the width of the end of the groove is 0.05mm, such as Figure 6 shown.

[0046] One end of the spring 1, that is, the welding section, is screwed into the groove along the starting end of the groove until it reaches the end of the groove, and then the welding section is fixed to the pipe by laser welding. In the starting section of the groove, welding is performed on the first side of the spring spiral of the spring 1, and the center of the welding point is biased toward the pipe; in the last section of the groove, welding is performed on the second side of the spring spiral of the spring 1, and the center of the welding point is located in the middle of the gap between the spring coil and the pipe, and an intermediate transition section is left between the starting section and the last section as a buffer zone without welding.

[0047] That is, the thinner the spring wire is and the closer it is to the starting section, the more it should reduce the thermal damage to the spring wire during welding to prevent breakage. When welding the final section, there is already the welding force of the starting section and the buffer zone to disperse the stress, so there is no need to worry too much about the spring wire breaking. Therefore, the final weld should be in the middle to avoid cold welding.

[0048] This welding method can ensure that when the welding part 10 is subjected to external force, the external force can be more evenly distributed to each part of the welding, and it is not easy to cause welding fracture. Example 2

[0049] like Figure 2 As shown, in this embodiment, the spring 1 is welded to the shaft body, that is, the object 2. The wire diameter of the spring 1 does not exceed 2 mm, and in this embodiment, the wire diameter of the spring 1 is 0.2 mm.

[0050] The welding steps of spring 1 and shaft are as follows: A spiral groove adapted to the spring 1 is cut on the shaft body as the accommodating space 20, wherein the starting end of the groove is open and located at the end of the groove close to the spring 1, and the width of the groove is 0.2 mm. Figure 7 As shown; One end of the spring 1, that is, the welding section, is screwed into the groove along the starting end of the groove until it reaches the end of the groove, and then the welding section is fixed to the shaft body by laser welding, wherein, on the first side of the spring spiral of the spring 1, the center of the welding point is located on the shaft body; on the second side of the spring spiral of the spring 1, the center of the welding point is located on the shaft body. The connection welded in this way can increase the welding connection area and greatly reduce the degree of damage to the filament of the spring 1 at the main stress position during the welding process. Example 3

[0051] like Figure 3 As shown, in this embodiment, the spring 1 is welded to the pipe, that is, the object 2. The wire diameter of the spring 1 does not exceed 2 mm, and in this embodiment, the wire diameter of the spring 1 is 0.1 mm.

[0052] The welding steps of spring 1 and pipe are as follows: A spiral groove adapted to the spring 1 is cut on the tube as the accommodating space 20, wherein the width of the groove is 0.11 mm, the starting end of the groove is open and located at the end of the groove close to the spring 1, such as Figure 8 As shown; One end of the spring 1, that is, the welding section, is screwed into the groove along the starting end of the groove until it reaches the end of the groove, and then the welding section is fixed to the pipe by laser welding, wherein, at the starting section of the groove, both sides of the spring are not welded; in the middle section of the groove, the spring 1 is welded to the pipe, and the center of the weld point is biased toward the pipe side; at the end of the groove, on the second side of the spring coil of the spring 1, the center of the weld point is located in the middle of the gap between the spring coil and the pipe.

[0053] The connection section welded in this way can have a certain elasticity, which can improve the impact resistance of the connection. Example 4

[0054] like Figure 4 As shown, in this embodiment, the spring 1 is welded to another spring component, that is, the object 2. The spring 1 and the spring component have the same diameter and the same wire diameter. In this embodiment, the wire diameter of the spring 1 is 0.1 mm.

[0055] The welding steps of spring 1 and spring parts are as follows: One end of the spring 1, i.e. the welding section, is screwed into the gap of the spring component, i.e. the accommodation space 20, and then the welding section and the spring component are fixed by laser welding, wherein, on one side of the spring 1, the welding point is located on the first side of the spring 1, and the center is biased toward the spiral wire of the spring component, i.e. the object 2; on one side of the spring component, the welding point is located on the second side of the spring 1, and the center is biased toward the spiral wire of the spring component; in the middle transition part of the two springs, the center of the welding point is located in the middle of the spiral wires of the two spring coils.

[0056] It should be noted that, in order to ensure coaxiality during docking, a matching connecting rod 3 may be used to pass through the spring 1 and the spring member, that is, the object 2, during the assembly and welding process, so as to stabilize the assembly and facilitate welding.

[0057] The thinner the spring, the more this welding method can ensure that when the welding part 10 is subjected to external force, the external force can be more evenly dispersed to various parts of the weld, and it is not easy to cause weld fracture. Example 5

[0058] like Figure 5 As shown, in this embodiment, a spring 1 is welded to another spring component, namely, an object 2. The diameter of the spring 1 is smaller than the diameter of the spring component, and the wire diameter of the spring 1 is also smaller than the wire diameter of the spring component. In this embodiment, the wire diameter of the spring 1 is 0.025 mm, the wire diameter of the spring component, namely, the object 2 is 0.1 mm, and the pitch of the welding section of the spring 1 is equal to the pitch of the spring component 2.

[0059] The welding steps of spring 1 and spring part 2 are as follows: One end of the spring 1, that is, the welding section, is screwed into the spiral recessed portion of the spring part, that is, the object 2, that is, the accommodating space 20, and then the welding section of the spring part, that is, the object 2, is welded and fixed by laser irradiation. This welding method uses the molten pool generated by the melting of the thick spring part, that is, the object 2, to weld the thinner spring 1, thereby achieving the purpose of non-destructive welding of the thinner spring 1.

[0060] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A spring welding method for welding the spring to a tubular or cylindrical object; characterized in that: The welding method comprises: The welding section of the spring used for welding is embedded into the receiving space of the object, wherein the receiving space is in a spiral shape adapted to the spring; The welding section and the object are fixed by laser welding, wherein the center of the welding point of the laser welding is close to the object or located on the object.

2. The spring welding method according to claim 1, characterized in that: There is a gap between the welding section and the object, the gap overlaps the accommodating space, and the center of the laser welding spot is located in the middle of the gap or in a region of the gap that is biased towards the object.

3. The spring welding method according to any one of claims 1 to 2, characterized in that: The welding section includes a plurality of spring spirals connected in sequence and spaced apart. In the axial direction of the spring and in the direction pointing to the object, the spring spiral has a first side and a second side on both sides in sequence, wherein at least the second side is welded and fixed to the object.

4. The spring welding method according to claim 3, characterized in that: The second side is welded and fixed to the object, and the first side is not welded and fixed to the object.

5. The spring welding method according to claim 3, characterized in that: The second side is fixed to the object by welding, and the first side is fixed to the object by welding.

6. The spring welding method according to any one of claims 1 to 2, characterized in that: The slit / groove as the accommodating space of the object is open in the axial direction and points in the direction of the object, and includes a starting section, a middle section and an end section; The center of the welding spot of the last section is located in the middle of the gap between the spring and the welding object, and the center of the welding spot of the starting section is located in the area where the gap deviates toward the object.

7. The spring welding method according to claim 6, characterized in that: The end section is welded on the second side, the start section is welded on the first side, and the middle section is not welded.

8. The spring welding method according to claim 1, characterized in that: The object comprises a cylinder; the accommodating space comprises a groove arranged on the outer surface of the cylinder, the groove is spiral and open, and the open end of the groove is located at one end of the cylinder close to the spring.

9. The spring welding method according to claim 1, characterized in that: The object comprises a shaft body; the accommodating space comprises a groove arranged on the outer surface of the shaft body, the groove is spiral and one end is open, and the open end of the groove is located at one end of the shaft body close to the spring.

10. The spring welding method according to any one of claims 7-8, characterized in that: Along the direction from the opening end of the groove to the other end, the width of the groove gradually approaches the diameter of the spring wire.

11. The spring welding method according to any one of claims 1 to 2, characterized in that: The object comprises a plurality of spring spiral rings which are connected in sequence and distributed at intervals; the accommodating space comprises the gaps between the plurality of spring spiral rings and / or the concave parts formed by the tight fit of the filamentary spirals.

12. The spring welding method according to any one of claims 1 to 2, characterized in that: During the welding process of the spring, a connecting rod is inserted into the spring and / or the object, wherein the diameter of the connecting rod is equal to the smaller one of the inner diameter of the spring and the inner diameter of the object.

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