Coil bending tool and bending method

Abstract

The invention provides a bending tool and a bending method for a coil. The bending device comprises a shaping part and a fixing part which can be disassembled and assembled, and the shaping part and the fixing part are assembled to form a bending assembly; a first bending groove is formed in the contact surface of the shaping part and the fixing part; the first bending groove is used for forming a first bending part of the coil; outer grooves are formed in the non-contact surfaces of the shaping part and the fixing part respectively, and after the shaping part and the fixing part are assembled, the outer grooves in the bending assembly form second bending grooves; and the second bending groove is used for forming a second bending part of the coil. The first bending part and the second bending part of the coil are formed through the first bending groove located in the bending assembly and the second bending groove located in the outer side of the bending assembly, so that bending of complex shapes of the coil is achieved, and the machining efficiency and the machining precision of the coil are improved.

Description

Technical Field

[0001] The invention relates to the technical field of heating coil bending, and in particular to a coil bending tool and a coil bending method. Background Art

[0002] During the application process, the heating coil needs to be bent into a specific shape according to its application scenario, such as L-shaped, S-shaped, circular or spiral structure, etc. With the expansion of the application scenarios of the heating coil, in certain occasions, the heating coil needs to be bent into a molded product with a combination of multiple shapes. The bending devices for heating coils or copper tubes in the prior art are all single-shaped bends.

[0003] Patent CN219944246U discloses a copper tube winding guide device, which firstly levels the copper tube, then changes the direction of the copper tube in sequence through the copper tube guide ring until the copper tube is bent into a ring structure, and then directly winds the copper tube under the action of the winding roller after the ring structure is formed. In this technical solution, only the outer coil can be processed to form a single circular or spiral structure, and the inner coil cannot be processed at the same time to form a composite bending structure. Summary of the invention

[0004] In order to overcome the problems existing in the related art, one of the objects of the present invention is to provide a bending tool for a coil, which forms a first bending portion and a second bending portion of the coil by a first bending groove located inside the bending component and a second bending groove located outside the bending component, so as to realize the bending of the complex shape of the coil and improve the processing efficiency and processing accuracy of the coil.

[0005] A coil bending tool, comprising a shaping part and a fixing part that can be disassembled and assembled, wherein the shaping part and the fixing part are assembled to form a bending assembly;

[0006] A first bending groove is provided in the contact surface between the shaping portion and the fixing portion; the first bending groove is used to form a first bending portion of the coil;

[0007] The non-contact surfaces of the shaping part and the fixing part are respectively provided with outer grooves. When the shaping part and the fixing part are assembled, the outer groove in the bending assembly forms a second bending groove; the second bending groove is used to form a second bending part of the coil.

[0008] The present application forms a first bending portion and a second bending portion of a coil by means of a first bending groove located inside a bending component and a second bending groove located outside the bending component, so as to achieve bending of a complex shape of the coil and improve the processing efficiency and accuracy of the coil.

[0009] In a preferred technical solution of the present invention, a positioning seat is further included, the bending assembly is fixed in the positioning seat, and the second bending groove is located on the outside of the positioning seat.

[0010] The positioning seat is used to fix the bending assembly after assembly, ensuring that the shaping part and the fixing part will not be offset during the coil bending process, and the outer grooves on the outside of the shaping part and the fixing part together form a second bending groove. The fixing of the positioning seat also keeps the shape of the second bending groove relatively stable, which helps to improve the bending accuracy of the coil in the second bending groove.

[0011] In a preferred technical solution of the present invention, the first bending groove is S-shaped or L-shaped.

[0012] In the present application, the first bending groove can be a planar structure arbitrarily distributed in the contact surface between the shaping portion and the fixed portion. In actual operation, the heating coil usually needs to be set to an S-shape, L-shape or serpentine structure, etc. The present application can set a plurality of shaping portions with different first bending groove shapes, and all can be adapted and assembled with the fixed portion. When coils with different first bending portions are required, only a specific shaping portion and a fixed portion need to be selected for assembly. The present application has a simple structure and strong adaptability. Different coil bending structures can be formed correspondingly by shaping portions with first bending grooves of different shapes, thereby further improving the processing efficiency of coil bending.

[0013] In a preferred technical solution of the present invention, the first bending groove and the first bending portion are clearance matched, and the second bending groove and the second bending portion are clearance matched.

[0014] In the present application, there are multiple inflection points in the first bending groove, and when the coil is formed in the first bending groove, it is done by heating the hollow copper tube. The hollow copper tube after heating has good ductility. At this time, the hollow copper tube can be directly bent into a shape that matches the first bending groove outside the first bending groove, and then the first bending portion can be embedded in the first bending groove, or the heated hollow copper tube can be bent and formed along the shape of the first bending groove. Regardless of the method, the outer diameter of the first bending portion embedded in the first bending groove is smaller than the inner diameter of the first bending groove, that is, the first bending groove and the first bending portion are clearance-matched, which is not only determined by the processing technology, but also facilitates the removal of the coil from the bending assembly after subsequent bending and forming.

[0015] In a preferred technical solution of the present invention, the shaping portion and the fixing portion are both semi-cylindrical structures, and the second bending groove is circular or spiral.

[0016] The present application can set the shaping part and the fixing part to be cylindrical structures, and the contact surface of the shaping part and the fixing part is rectangular. When the two are separated, the shaping part and the fixing part both include a semi-cylinder and a rectangular bottom surface. At the same time, outer grooves are provided on the outer sides of the semi-cylinders of the shaping part and the fixing part. When the two are assembled, a cylindrical bending component is formed, and the outer grooves on the outer sides of the shaping part and the fixing part form a second bending groove, and the second bending groove is a circular or spiral structure. The present application can realize the structural design of the second bending grooves of different structures by designing the shape of the outer grooves in the non-contact surfaces of the shaping part and the fixing part; when the shaping part and the fixing part are assembled, the bending forming of the second bending part of the coil can be realized.

[0017] In a preferred technical solution of the present invention, the end of the first bending groove is connected to the end of the second bending groove.

[0018] The first bending portion and the second bending portion in the coil of the present application are continuous structures, that is, the coil or the hollow copper tube needs to be bent into a structure that is compatible with the first bending portion first, and then bent into a structure that is compatible with the second bending portion. Therefore, the present application sets the end of the first bending groove to be connected with the starting end of the second bending groove. In this way, during the bending and forming process of the coil, a hollow copper tube of an appropriate length can be cut out first, and the hollow copper tube can be bent and embedded in the first bending groove, and then the shaping part and the fixing part are assembled to form a bending assembly. The hollow copper tube behind the first bending portion continues to be bent along the starting end of the second bending portion until it is completely embedded in the second bending groove, and finally the overall bending of the coil is completed. Connecting the first bending groove and the second bending groove helps to form a complete and continuous bending coil structure, thereby improving the efficiency of coil processing.

[0019] In a preferred technical solution of the present invention, a countersunk hole is provided in the positioning seat, and the countersunk hole is adapted to the bottom of the bending component.

[0020] The shaping part and the fixing part of the present application are assembled to form a bending assembly, wherein the first bending groove is located on the contact surface between the shaping part and the fixing part, the second bending groove is located on the top of the bending assembly, and a space is reserved at the bottom of the bending assembly without setting the second bending groove, so as to facilitate the overall assembly and fixing of the bending assembly in the positioning seat. When the bending assembly is a cylindrical structure, a cylindrical countersunk hole is provided in the positioning seat, and the cylindrical bending assembly is directly placed inside the cylindrical countersunk hole and fixed. In this way, it can be ensured that the shape of the second bending groove on the outside of the bending assembly is fixed and unique, which helps to improve the bending accuracy of the coil.

[0021] In a preferred technical solution of the present invention, the shaping portion and the fixing portion are fixedly assembled by a first fastener, and the bending assembly and the positioning seat are fixedly assembled by a second fastener;

[0022] The positioning seat is provided with an avoidance groove, and when the bending assembly is installed in the positioning seat, the first fastener is located in the avoidance groove.

[0023] In the present application, a first threaded hole is provided in the shaping part, a second threaded hole is provided in the fixing part, and the first fastener can be specifically a first fixing screw, which passes through the first threaded hole and the second threaded hole in sequence to fasten the shaping part and the fixing part. At the same time, the second fastener can be specifically a second fixing screw, a third threaded hole is provided in the positioning seat, and the second fixing screw passes through the third threaded hole, the first threaded hole, and the second threaded hole to fasten the positioning seat and the bending assembly. It should be noted that the first threaded hole and the second threaded hole passed through by the first fixing screw and the second fixing screw do not overlap, and the number of the first threaded hole and the second threaded hole are both multiple, so as to facilitate the assembly of the fixing part and the shaping part, and the assembly of the bending assembly and the positioning seat.

[0024] In order to make the bending tool compact and easy to carry and transport, the present application sets an avoidance groove on the side of the countersunk hole in the positioning seat, and when the bending component is installed in the positioning seat, the first fastener is located in the avoidance groove. This can reduce the area used for fixing at the bottom of the bending component, while ensuring that the bending component and the positioning seat are tightly assembled, so that the structure of the bending tool is compact and easy to carry and transport.

[0025] The present application also provides a coil bending method, which is implemented based on the bending tool as described above, and includes:

[0026] The shaping part and the fixing part are separated, and the first bending part in the coil is bent into shape in the first bending groove in the shaping part;

[0027] The shaping part and the fixing part are assembled, and the second bending part in the coil is bent and formed in the second bending groove in the bending assembly; thus, a coil having a first bending part and a second bending part is formed.

[0028] The present application can realize the bending forming of the first bending portion and the second bending portion of the coil by separating and assembling the shaping portion and the fixing portion. The operation method is simple and the processing efficiency and processing accuracy of the coil are improved.

[0029] In a preferred technical solution of the present invention, after forming the coil having the first bending portion and the second bending portion, the method further comprises:

[0030] Remove the fixed part from the formed coil;

[0031] The formed coil is taken out from the first bending groove in the forming part.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a coil bending tool, including a shaping part and a fixing part that can be disassembled and assembled, and the shaping part and the fixing part form a bending assembly after being assembled. Specifically, a first bending groove is provided in the contact surface between the shaping part and the fixing part; the first bending groove is used to form the first bending part of the coil; the non-contact surfaces of the shaping part and the fixing part are respectively provided with external grooves, so that a second bending groove is formed on the outside of the bending assembly; the second bending groove is used to form the second bending part of the coil. The present application forms the first bending part and the second bending part of the coil by a first bending groove located inside the bending assembly and a second bending groove located outside the bending assembly, so as to realize the bending of the complex shape of the coil and improve the processing efficiency and processing accuracy of the coil.

[0034] The present application also provides a method for bending a coil, wherein the shaping portion and the fixed portion are first separated, and the first bending portion in the coil is bent and formed in the first bending groove in the shaping portion; then the shaping portion and the fixed portion are assembled, and the second bending portion in the coil is bent and formed in the second bending groove in the bending assembly; a coil having a first bending portion and a second bending portion is formed. The present application can realize the bending and forming of the first bending portion and the second bending portion of the coil by separating and assembling the shaping portion and the fixed portion, and the operation method is simple, which improves the processing efficiency and processing accuracy of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the shaping part in Example 3;

[0036] Figure 2 is a schematic structural diagram of the fixing part in Example 3;

[0037] Figure 3 is a schematic structural diagram of a bending assembly in Example 3;

[0038] Figure 4 It is a structural schematic diagram of the positioning seat in Example 3;

[0039] Figure 5 It is a schematic diagram of the structure after the bending assembly and the positioning seat are assembled in Example 3;

[0040] Figure 6 It is a side view schematic diagram of the bending assembly and the positioning seat after being assembled in Example 3;

[0041] Figure 7 A top view of the bending assembly and the positioning seat after being assembled in Example 3;

[0042] Figure 8 It is an exploded schematic diagram of the bending assembly and the positioning seat after being assembled in Example 3;

[0043] Fig. 9 This is a schematic diagram of the coil after being formed in the first bending groove in Example 3;

[0044] Fig.10 This is a schematic diagram of the structure of the coil after bending and forming in Example 3;

[0045] Fig.11 It is an exploded schematic diagram of the bending assembly and the positioning seat after being assembled in Example 4;

[0046] Fig.12 This is a schematic diagram of the structure of the coil after bending and forming in Example 4.

[0047] Reference numerals:

[0048] 2. Shaping portion; 3. Fixing portion; 4. Positioning seat; 5. First fixing screw; 6. Second fixing screw; 10. Bending assembly; 11. First bending portion; 12. Second bending portion; 13. Pipe joint; 21. First bending groove; 22. External groove; 23. First threaded hole; 31. Second bending groove; 32. Second threaded hole; 41. Third threaded hole; 42. Avoidance groove; 43. Countersunk hole. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0050] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. 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.

[0051] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0052] Example 1

[0053] like Figure 1-Figure 12As shown, the present application provides a coil bending tool, comprising a shaping part 2 and a fixing part 3 that can be disassembled and assembled, wherein the shaping part 2 and the fixing part 3 are assembled to form a bending assembly 10.

[0054] A first bending groove 21 is provided in the contact surface between the shaping portion 2 and the fixing portion 3; the first bending groove 21 is used to form the first bending portion 11 of the coil;

[0055] The non-contact surfaces of the shaping part 2 and the fixing part 3 are respectively provided with outer grooves 22. When the shaping part 2 and the fixing part 3 are assembled, the outer grooves 22 in the bending assembly 10 form a second bending groove 31; the second bending groove 31 is used to form the second bending part 12 of the coil.

[0056] The present application forms a first bending portion 11 and a second bending portion 12 of the coil by means of a first bending groove 21 located inside the bending component 10 and a second bending groove 31 located outside the bending component 10, so as to achieve bending of the complex shape of the coil and improve the processing efficiency and processing accuracy of the coil.

[0057] The coil in the present application may be a heating coil, that is, a heating coil with a final complex structure formed by bending a hollow copper tube. After the heating coil is bent into a specific shape, a heating wire may be arranged inside the heating coil or a liquid or gas with a higher temperature may be passed through the heating coil to achieve a heating function.

[0058] In the present application, during the bending process of the coil, a hollow copper tube is used as a raw material for bending. The hollow copper tube has good ductility after heating and can be bent into shape in the first bending groove 21 and the second bending groove 31 .

[0059] The innovation of the present application is reflected in that the first bending portion 11 is formed inside the fixing portion 3 and the shaping portion 2 which are separately assembled, and the second bending portion 12 is formed outside the fixing portion 3 and the shaping portion 2. The heating coil having the first bending portion 11 and the second bending portion 12 can be formed by a single bending molding.

[0060] The coil in the present application is not limited to a heating coil, but can also be other coils that need to be bent into a complex structure. The material of the coil in the present application is not limited to a hollow copper tube, but can also be other materials that have good ductility under heating.

[0061] In the present application, the first bending groove 21 is located in the contact surface between the shaping portion 2 and the fixing portion 3, and it can be a planar structure, such as an L-shaped, S-shaped or serpentine shape. After the first bending portion 11 in the coil is formed, the shaping portion 2 and the fixing portion 3 are fixedly assembled, and then the second bending portion 12 is formed, so that the forming of different bending portions in the coil is converted into the assembly process of the bending assembly 10, thereby improving the coil forming accuracy and processing efficiency.

[0062] Example 2

[0063] like Figure 1-Figure 12 As shown, the present application provides a coil bending tool, comprising a shaping part 2 and a fixing part 3 that can be disassembled and assembled, wherein the shaping part 2 and the fixing part 3 are assembled to form a bending assembly 10.

[0064] A first bending groove 21 is provided in the contact surface between the shaping portion 2 and the fixing portion 3; the first bending groove 21 is used to form the first bending portion 11 of the coil;

[0065] The non-contact surfaces of the shaping part 2 and the fixing part 3 are respectively provided with outer grooves 22. When the shaping part 2 and the fixing part 3 are assembled, the outer grooves 22 in the bending assembly 10 form a second bending groove 31; the second bending groove 31 is used to form the second bending part 12 of the coil.

[0066] Furthermore, the bending tool of the present application further includes a positioning seat 4 , the bending assembly 10 is fixed in the positioning seat 4 , and the second bending groove 31 is located on the outer side of the positioning seat 4 .

[0067] The positioning seat 4 is used to fix the assembled bending assembly 10, ensuring that the shaping portion 2 and the fixing portion 3 will not be offset during the coil bending process, and the outer grooves 22 on the outer sides of the shaping portion 2 and the fixing portion 3 together form the second bending groove 31. The fixing of the positioning seat 4 also keeps the shape of the second bending groove 31 relatively stable, which helps to improve the bending accuracy of the coil in the second bending groove 31.

[0068] Furthermore, the first bending groove 21 is S-shaped or L-shaped.

[0069] In the present application, the first bending groove 21 can be a planar structure arbitrarily distributed in the contact surface between the shaping portion 2 and the fixing portion 3. In actual operation, the heating coil usually needs to be set to an S-shaped, L-shaped or serpentine structure, etc. The present application can set a plurality of shaping portions 2 with different shapes of the first bending groove 21, and all can be adapted and assembled with the fixing portion 3. When a coil with a different first bending portion 11 is required, it is only necessary to select a specific shaping portion 2 and the fixing portion 3 for assembly. The present application has a simple structure and strong adaptability. Different coil bending structures can be formed correspondingly by the shaping portion 2 with first bending grooves 21 of different shapes, further improving the processing efficiency of the coil bending.

[0070] Furthermore, the first bending groove 21 and the first bending portion 11 are loosely matched, and the second bending groove 31 and the second bending portion 12 are loosely matched.

[0071] In the present application, the first bending groove 21 has a plurality of inflection points, and when the coil is formed in the first bending groove 21, it is done by heating the hollow copper tube. The heated hollow copper tube has good ductility. At this time, the hollow copper tube can be directly bent into a shape that matches the first bending groove 21 on the outside of the first bending groove 21, and then the first bending portion 11 can be embedded in the first bending groove 21, or the heated hollow copper tube can be bent and formed along the shape of the first bending groove 21. Regardless of the method, the outer diameter of the first bending portion 11 embedded in the first bending groove 21 is smaller than the inner diameter of the first bending groove 21, that is, the first bending groove 21 and the first bending portion 11 are clearance-matched, which is not only determined by the processing technology, but also facilitates the subsequent removal of the coil from the bending assembly 10 after bending and forming.

[0072] Similarly, the second bending groove 31 has multiple inflection points, and when the coil is formed in the second bending groove 31, it is done by heating the hollow copper tube. The heated hollow copper tube has good ductility. At this time, the hollow copper tube can be directly bent into a shape that matches the second bending groove 31 outside the second bending groove 31, and then the second bending portion 12 can be embedded in the second bending groove 31, or the heated hollow copper tube can be bent along the shape of the second bending groove 31. Regardless of the method, the outer diameter of the second bending portion 12 embedded in the second bending groove 31 is smaller than the inner diameter of the second bending groove 31, that is, the second bending groove 31 and the second bending portion 12 are clearance-matched, which is not only determined by the processing technology, but also facilitates the subsequent removal of the coil from the bending assembly 10 after bending.

[0073] It should be noted that when the hollow copper tube is bent, the hollow copper tube is first heated to make it have good ductility, and then one end of the hollow copper tube is fixed, and the other end is sequentially extended around the internal track of the first bending groove. During the extension process, in view of the good ductility of the hollow copper tube, the outer diameter of the bent hollow copper tube is slightly smaller than the inner diameter of the first bending groove or the second bending groove. This is because the inner diameter of the hollow copper tube itself will become smaller after the extension, and at the same time, the hollow copper tube is bent along each inflection point of the first bending groove or the second bending groove, and the bending itself will stretch the hollow copper tube embedded in the first bending groove or the second bending groove, so that its length increases and the inner diameter decreases.

[0074] As a specific embodiment, the shaping portion 2 and the fixing portion 3 are both semi-cylindrical structures, and the second bending groove 31 is circular or spiral.

[0075] During use, the heating coil usually needs to have an annular structure or a spiral structure to have a larger heating area. Correspondingly, the present application can set the shaping part 2 and the fixing part 3 to be cylindrical structures, and the contact surface of the shaping part 2 and the fixing part 3 is rectangular. When the two are separated, the shaping part 2 and the fixing part 3 both include a semi-cylinder and a rectangular bottom surface. At the same time, an outer groove 22 is provided on the outer side of the semi-cylinder of the shaping part 2 and the fixing part 3. When the two are assembled, a cylindrical bending component 10 is formed, and the outer groove 22 on the outer side of the shaping part 2 and the fixing part 3 forms a second bending groove 31, and the second bending groove 31 is a circular or spiral structure. The present application can realize the structural design of the second bending groove 31 of different structures by designing the shape of the outer groove 22 in the non-contact surface of the shaping part 2 and the fixing part 3; when the shaping part 2 and the fixing part 3 are assembled, the bending forming of the second bending part 12 of the coil can be realized.

[0076] As a specific embodiment, an end of the first bending groove 21 is connected to an end of the second bending groove 31 .

[0077] The first bending portion 11 and the second bending portion 12 in the coil of the present application are continuous structures, that is, the coil or the hollow copper tube needs to be bent into a structure that is compatible with the first bending portion 11 first, and then bent into a structure that is compatible with the second bending portion 12. Therefore, the present application sets the end of the first bending groove 21 to be connected with the starting end of the second bending groove 31. In this way, during the bending and forming process of the coil, a hollow copper tube of an appropriate length can be cut out first, and the hollow copper tube can be bent and embedded in the first bending groove 21, and then the shaping portion 2 and the fixing portion 3 are assembled to form a bending assembly 10. The hollow copper tube behind the first bending portion 11 continues to be bent along the starting end of the second bending portion 12 until it is completely embedded in the second bending groove 31, and finally the overall bending of the coil is completed. Connecting the first bending groove 21 and the second bending groove 31 helps to form a complete and continuous bending coil structure, thereby improving the efficiency of coil processing.

[0078] As a specific embodiment, a countersunk hole 43 is provided in the positioning seat 4 , and the countersunk hole 43 is matched with the bottom of the bending component 10 .

[0079] The shaping part 2 and the fixing part 3 of the present application are assembled to form a bending component 10, wherein the first bending groove 21 is located on the contact surface between the shaping part 2 and the fixing part 3, the second bending groove 31 is located at the top of the bending component 10, and a space is reserved at the bottom of the bending component 10 without setting the second bending groove 31, so that it is convenient to assemble and fix the bending component 10 as a whole in the positioning seat 4. When the bending component 10 is a cylindrical structure, a cylindrical countersunk hole 43 is provided in the positioning seat 4, and the cylindrical bending component 10 is directly placed inside the cylindrical countersunk hole 43 and fixed. In this way, it can be ensured that the second bending groove 31 on the outside of the bending component 10 has a fixed and unique shape, which helps to improve the bending accuracy of the coil.

[0080] As a specific embodiment, the shaping portion 2 and the fixing portion 3 are fixedly assembled by a first fastener, and the bending component 10 and the positioning seat 4 are fixedly assembled by a second fastener; an avoidance groove 42 is provided in the positioning seat 4, and when the bending component 10 is installed in the positioning seat 4, the first fastener is located in the avoidance groove 42.

[0081] In the present application, the shaping part 2 is provided with a first threaded hole 23, the fixing part 3 is provided with a second threaded hole 32, and the first fastener can be specifically a first fixing screw 5, which passes through the first threaded hole 23 and the second threaded hole 32 in sequence to fasten the shaping part 2 and the fixing part 3. At the same time, the second fastener can be specifically a second fixing screw 6, and the positioning seat 4 is provided with a third threaded hole 41, and the second fixing screw 6 passes through the third threaded hole 41, the first threaded hole 23 and the second threaded hole 32 to fasten the positioning seat 4 and the bending component 10. It should be noted that the first threaded hole 23 and the second threaded hole 32 passed by the first fixing screw 5 and the second fixing screw 6 do not overlap, and the number of the first threaded hole 23 and the second threaded hole 32 are both multiple, so as to facilitate the assembly of the fixing part 3 and the shaping part 2, and the assembly of the bending component 10 and the positioning seat 4.

[0082] In order to make the bending tool compact and easy to carry and transport, the present application sets an avoidance groove 42 on the side of the countersunk hole 43 in the positioning seat 4. When the bending assembly 10 is installed in the positioning seat 4, the first fastener is located in the avoidance groove 42. In this way, the area used for fixing the bottom of the bending assembly 10 can be reduced, while ensuring that the bending assembly 10 and the positioning seat 4 are tightly assembled, so that the structure of the bending tool is compact and easy to carry and transport.

[0083] Example 3

[0084] like Figure 1-Figure 10 As shown, the present application provides a coil bending tool, which includes a shaping part 2 and a fixing part 3 that can be disassembled and assembled. The shaping part 2 and the fixing part 3 are assembled to form a bending assembly 10, and the bending assembly 10 can be fixed in a positioning seat 4.

[0085] A first bending groove 21 is provided in the contact surface between the shaping portion 2 and the fixing portion 3; the first bending groove 21 is used to form the first bending portion 11 of the coil; the first bending groove 21 is an S-shaped structure, and the first bending groove 21 is gap-matched with the first bending portion 11 in the coil.

[0086] The non-contact surfaces of the shaping part 2 and the fixing part 3 are respectively provided with outer grooves 22. When the shaping part 2 and the fixing part 3 are assembled, the outer grooves 22 in the bending assembly 10 form a second bending groove 31; the second bending groove 31 is used to form the second bending part 12 of the coil; the second bending groove 31 is clearance-matched with the second bending part 12. In this embodiment, the shaping part 2 and the fixing part 3 are both cylindrical structures, and the contact surfaces of the shaping part 2 and the fixing part 3 are rectangular. When the two are separated, the shaping part 2 and the fixing part 3 both include a semi-cylinder and a rectangular bottom surface. At the same time, the outer grooves 22 are provided on the outer side of the semi-cylinder of the shaping part 2 and the fixing part 3. When the two are assembled, a cylindrical bending assembly 10 is formed, and the outer grooves 22 on the outer sides of the shaping part 2 and the fixing part 3 form the second bending groove 31, and the second bending groove 31 is a spiral structure.

[0087] In this embodiment, the end of the first bending groove 21 is connected to the end of the second bending groove 31, wherein the end of the first bending portion 11 refers to a position close to the bottom of the shaping portion 2, and the starting end of the second bending groove 31 refers to a position of the second bending groove 31 close to the bottom of the bending assembly 10.

[0088] like Figure 4 As shown, the positioning seat 4 of the present application is provided with a countersunk hole 43, and the countersunk hole 43 is adapted to the bottom of the bending component 10, that is, the countersunk hole 43 is a cylindrical groove. The shaping portion 2 is provided with a first threaded hole 23, and the fixing portion 3 is provided with a second threaded hole 32. The first fastener can be specifically a first fixing screw 5, and the first fixing screw 5 passes through the first threaded hole 23 and the second threaded hole 32 in sequence to fasten the shaping portion 2 and the fixing portion 3. The second fastener can be specifically a second fixing screw 6, and the positioning seat 4 is provided with a third threaded hole 41. The second fixing screw 6 passes through the third threaded hole 41, the first threaded hole 23 and the second threaded hole 32 to fasten the positioning seat 4 and the bending component 10. It should be noted that the first threaded hole 23 and the second threaded hole 32 passed by the first fixing screw 5 and the second fixing screw 6 do not overlap, and the number of the first threaded hole 23 and the second threaded hole 32 is multiple, so as to facilitate the assembly of the fixing portion 3 and the shaping portion 2, and the assembly of the bending component 10 and the positioning seat 4.

[0089] When the bending assembly 10 is fixed in the positioning seat 4, the second bending groove 31 is located outside the positioning seat 4. The present application defines that the top of the bending assembly 10 is provided with the second bending groove 31, the bottom of the bending assembly 10 is used to assemble with the positioning seat 4, and the size of the second bending groove 31 in the height direction is much larger than the size of the assembly area.

[0090] This embodiment also provides a coil bending method, including:

[0091] Cut the hollow copper tube of a predetermined length. Since the hollow copper tube has good ductility after being heated, first heat the S-shaped portion of the corresponding section of the hollow copper tube, bend the hollow copper tube in the first bending groove 21 of the shaping portion 2, and embed it in the first bending groove 21, and reserve the length of the outer layer bending tube. At this time, the structure of the coil is as follows: Fig. 9 shown.

[0092] Then, the shaping part 2 and the fixing part 3 are assembled and fixed by the first fixing screw 5 to form a bending assembly 10. Figure 3 Then, the bending assembly 10 and the hollow copper tube are assembled and fixed by the second fixing screw 6 and the positioning seat 4 to form a Figure 5-Figure 7 The structure shown. Figure 3 and Fig.10 As shown, in this embodiment, the outer diameter D of the second bending groove 31 is equal to the inner diameter R of the second bending portion 12. The second bending portion 12 can be formed by bending the reserved outer length of the S-shaped hollow copper tube around the second bending groove 31.

[0093] After the coil is formed, the second fixing screw 6 is first loosened to separate the bending assembly 10 from the positioning seat 4. Then the first fixing screw 5 is loosened. Since the second bending groove 31 and the second bending portion 12 are in clearance fit, the fixing portion 3 is rotated to separate it from the coil, and the semi-cylindrical part of the fixing portion 3 in the bending assembly 10 is removed. Since the first bending groove 21 and the first bending portion 11 are in clearance fit, that is, the outer diameter of the first bending portion 11 is slightly smaller than the inner diameter of the first bending groove 21, the shaping portion 2 can be smoothly removed from the bending coil.

[0094] Finally, the pipe joint 13 is processed on the bent coil end to complete the coil processing.

[0095] The present application can realize the bending forming of the first bending portion 11 and the second bending portion 12 of the coil by separating and assembling the shaping portion 2 and the fixing portion 3. The operation method is simple and the processing efficiency and processing accuracy of the coil are improved.

[0096] Example 4

[0097] like Figure 11-Figure 12As shown, the present application provides a coil bending tool, which includes a shaping part 2 and a fixing part 3 that can be disassembled and assembled. The shaping part 2 and the fixing part 3 are assembled to form a bending assembly 10, and the bending assembly 10 can be fixed in a positioning seat 4.

[0098] like Fig.11 As shown, a first bending groove 21 is provided in the contact surface between the shaping portion 2 and the fixing portion 3; the first bending groove 21 is used to form the first bending portion 11 of the coil; the first bending groove 21 is an L-shaped structure, and the first bending groove 21 is gap-matched with the first bending portion 11 in the coil.

[0099] The non-contact surfaces of the shaping part 2 and the fixing part 3 are respectively provided with outer grooves 22. When the shaping part 2 and the fixing part 3 are assembled, the outer grooves 22 in the bending assembly 10 form a second bending groove 31; the second bending groove 31 is used to form the second bending part 12 of the coil. In this embodiment, the shaping part 2 and the fixing part 3 are both cylindrical structures, and the contact surfaces of the shaping part 2 and the fixing part 3 are rectangular. When the two are separated, the shaping part 2 and the fixing part 3 both include a semi-cylinder and a rectangular bottom surface. At the same time, the outer grooves 22 are provided on the outer side of the semi-cylinder of the shaping part 2 and the fixing part 3. When the two are assembled, a cylindrical bending assembly 10 is formed, and the outer grooves 22 on the outer sides of the shaping part 2 and the fixing part 3 form a second bending groove 31, and the second bending groove 31 is a spiral structure.

[0100] In this embodiment, the end of the first bending groove 21 is connected to the end of the second bending groove 31, wherein the end of the first bending portion 11 refers to a position close to the bottom of the shaping portion 2, and the starting end of the second bending groove 31 refers to a position of the second bending groove 31 close to the bottom of the bending assembly 10.

[0101] The positioning seat 4 of the present application is provided with a countersunk hole 43, and the countersunk hole 43 is adapted to the bottom of the bending component 10, that is, the countersunk hole 43 is a cylindrical groove. The shaping portion 2 is provided with a first threaded hole 23, and the fixing portion 3 is provided with a second threaded hole 32. The first fastener can be specifically a first fixing screw 5, and the first fixing screw 5 passes through the first threaded hole 23 and the second threaded hole 32 in sequence to fasten the shaping portion 2 and the fixing portion 3. The second fastener can be specifically a second fixing screw 6, and the positioning seat 4 is provided with a third threaded hole 41, and the second fixing screw 6 passes through the third threaded hole 41, the first threaded hole 23 and the second threaded hole 32 to fasten the positioning seat 4 and the bending component 10. It should be noted that the first threaded hole 23 and the second threaded hole 32 passed by the first fixing screw 5 and the second fixing screw 6 do not overlap, and the number of the first threaded hole 23 and the second threaded hole 32 is multiple, so as to facilitate the assembly of the fixing portion 3 and the shaping portion 2, and the assembly of the bending component 10 and the positioning seat 4.

[0102] When the bending assembly 10 is fixed in the positioning seat 4, the second bending groove 31 is located outside the positioning seat 4. The present application defines that the top of the bending assembly 10 is provided with the second bending groove 31, the bottom of the bending assembly 10 is used to assemble with the positioning seat 4, and the size of the second bending groove 31 in the height direction is much larger than the size of the assembly area.

[0103] This embodiment also provides a coil bending method, including:

[0104] Cut the hollow copper tube to a predetermined length. Since the hollow copper tube has good ductility after heating, first heat the L-shaped part of the corresponding section in the hollow copper tube, bend the hollow copper tube into shape in the first bending groove 21 in the shaping part 2, and embed it in the first bending groove 21, and reserve the length of the outer layer bending tube part.

[0105] Then, the shaping portion 2 and the fixing portion 3 are assembled and fixed by the first fixing screw 5 to form the bending assembly 10. The bending assembly 10 and the hollow copper tube are then assembled and fixed by the second fixing screw 6 and the positioning seat 4. In this embodiment, the outer diameter D of the second bending groove 31 is equal to the inner diameter R of the second bending portion 12. The reserved outer layer length of the L-shaped hollow copper tube is bent around the second bending groove 31 to form the second bending portion 12.

[0106] After the coil is formed, the second fixing screw 6 is first loosened to separate the bending assembly 10 from the positioning seat 4. Then the first fixing screw 5 is loosened. Since the second bending groove 31 and the second bending portion 12 are in clearance fit, the fixing portion 3 is rotated to separate it from the coil, and the semi-cylindrical part of the fixing portion 3 in the bending assembly 10 is removed. Since the first bending groove 21 and the first bending portion 11 are in clearance fit, that is, the outer diameter of the first bending portion 11 is slightly smaller than the inner diameter of the first bending groove 21, the shaping portion 2 can be smoothly removed from the bending coil.

[0107] Finally, the pipe joint 13 is processed on the end of the bent coil to complete the processing of the coil, forming a Fig.12 The coil shown.

[0108] The present application can realize the bending forming of the first bending portion 11 and the second bending portion 12 of the coil by separating and assembling the shaping portion 2 and the fixing portion 3. The operation method is simple and the processing efficiency and processing accuracy of the coil are improved.

[0109] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings. In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0110] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0111] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0112] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coil bending tool, characterized in that: It comprises a shaping part (2) and a fixing part (3) which can be disassembled and assembled, and the shaping part (2) and the fixing part (3) are assembled to form a bending assembly (10); A first bending groove (21) is provided in the contact surface between the shaping portion (2) and the fixing portion (3); the first bending groove (21) is used to form a first bending portion (11) of the coil; External grooves (22) are respectively provided in the non-contact surfaces of the shaping part (2) and the fixing part (3); when the shaping part (2) and the fixing part (3) are assembled, the external grooves (22) in the bending assembly (10) form a second bending groove (31); the second bending groove (31) is used to form a second bending part (12) of the coil.

2. A coil bending tool according to claim 1, characterized in that: The first bending groove (21) is S-shaped or L-shaped.

3. A coil bending tool according to claim 2, characterized in that: The first bending groove (21) is loosely matched with the first bending portion (11), and the second bending groove (31) is loosely matched with the second bending portion (12).

4. The coil bending tool according to claim 1, characterized in that: The shaping portion (2) and the fixing portion (3) are both semi-cylindrical structures, and the second bending groove (31) is circular or spiral.

5. A coil bending tool according to claim 4, characterized in that: An end portion of the first bending groove (21) is connected to an end portion of the second bending groove (31).

6. The coil bending tool according to claim 1, characterized in that: It also comprises a positioning seat (4), the bending assembly (10) is fixed in the positioning seat (4), and the second bending groove (31) is located outside the positioning seat (4).

7. A coil bending tool according to claim 6, characterized in that: A countersunk hole (43) is provided in the positioning seat (4), and the countersunk hole (43) is adapted to the bottom of the bending component (10).

8. A coil bending tool according to claim 7, characterized in that: The shaping portion (2) and the fixing portion (3) are fixedly assembled by a first fastener, and the bending assembly (10) and the positioning seat (4) are fixedly assembled by a second fastener; An avoidance groove (42) is provided in the positioning seat (4); when the bending assembly (10) is installed in the positioning seat (4), the first fastener is located in the avoidance groove (42).

9. A method for bending a coil, characterized in that: The method is implemented based on the bending tool according to any one of claims 1 to 8, including: The shaping portion (2) and the fixing portion (3) are separated, and the first bending portion (11) in the coil is bent into shape in the first bending groove (21) in the shaping portion (2); The shaping portion (2) and the fixing portion (3) are assembled, and the second bending portion (12) in the coil is bent and formed in the second bending groove (31) in the bending assembly (10); thus forming a coil having a first bending portion (11) and a second bending portion (12).

10. A coil bending method according to claim 9, characterized in that: After forming a coil having a first bending portion (11) and a second bending portion (12), the method further comprises: removing the fixing portion (3) from the formed coil; The formed coil is taken out from the first bending groove (21) in the shaping portion (2).

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