Auxiliary jig for annealing shaping and annealing device

Abstract

The utility model discloses an auxiliary jig for annealing and shaping and an annealing device. The auxiliary jig comprises a supporting inner core, and at least one to-be-annealed part is arranged on the supporting inner core in a sleeving mode; the supporting inner core sleeved with the part to be annealed is arranged on the first jig; the second jig is arranged on the first jig, a containing space is formed by the first jig and the second jig, and the supporting inner core sleeved with the part to be annealed is located in the containing space; wherein the first jig and the second jig are used for annealing and shaping the outer surface of the to-be-annealed part, and the supporting inner core is used for annealing and shaping the inner surface of the to-be-annealed part, so that an annealed part is obtained. The to-be-annealed piece is arranged on the supporting inner core in a sleeving mode, the first jig and the second jig are used for conducting annealing shaping on the outer surface, meanwhile, the supporting inner core is used for conducting annealing shaping on the inner surface, simultaneous annealing of the inner surface and the outer surface is achieved through the auxiliary jig, the overall structure is simple, operation is easy and convenient, and cost is low; and an efficient and consistent shaping effect can be realized in batch shaping production.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of metal processing, in particular to an annealing and shaping auxiliary jig and an annealing device. BACKGROUND

[0002] In the field of material processing, for products of specific shapes, such as flat tube products, annealing stress relief is a common method aimed at eliminating internal stress generated during the processing of materials through a heat treatment process to prevent deformation and cracking. The traditional annealing stress relief method usually involves heating the material to a certain temperature, maintaining it for a period of time, and then slowly cooling it to achieve the release of internal stress. Although this method is effective, there are some limitations in actual operation, especially in batch shaping production, how to ensure the uniformity and efficiency of annealing stress relief is a technical challenge.

[0003] For products of specific shapes, the traditional annealing stress relief method may not provide sufficient shaping effect, especially after deformation occurs during product production, annealing stress relief shaping needs to be performed through an auxiliary jig to restore the shape and performance of the product. However, the existing auxiliary jig design often has problems such as complex structure, inconvenient operation, high cost, and difficulty in achieving efficient and consistent shaping effect in batch shaping production. CONTENT OF THE INVENTION

[0004] The application mainly provides an annealing and shaping auxiliary jig and an annealing device to solve the problems of complex structure, inconvenient operation, high cost of the existing auxiliary jig design, and difficulty in achieving efficient and consistent shaping effect in batch shaping production.

[0005] The application provides an annealing and shaping auxiliary jig, which comprises:

[0006] A support inner core, at least one to-be-annealed part is sleeved on the support inner core;

[0007] A first jig, the support inner core sleeved with the to-be-annealed part is arranged on the first jig;

[0008] A second jig is arranged on the first jig, the first jig and the second jig form a containing space, and the support inner core sleeved with the to-be-annealed part is located in the containing space;

[0009] The first jig and the second jig are used for annealing and shaping the outer surface of the to-be-annealed part, and the support inner core is used for annealing and shaping the inner surface of the to-be-annealed part, thereby obtaining an annealed part.

[0010] The first jig is provided with a groove, the groove is arranged along the length direction of the first jig, the support inner core of the to-be-annealed part is sleeved in the groove.

[0011] The first jig is provided with a plurality of first mounting holes, the plurality of first mounting holes are respectively located on both sides of the groove and are arranged at intervals along the length direction of the first jig.

[0012] The second jig is provided with a plurality of second mounting holes, the plurality of second mounting holes are arranged correspondingly to the plurality of first mounting holes.

[0013] The auxiliary jig further comprises a plurality of fixing members, the fixing members are arranged through the first mounting holes and the corresponding second mounting holes, and are used for connecting the second jig and the first jig.

[0014] The support inner core has a first end and a second end, the cross-sectional area of the first end is smaller than the cross-sectional area of the second end, and the at least one to-be-annealed part is sleeved on the second end through the first end.

[0015] The shape of the inner surface of the to-be-annealed part matches the cross-sectional shape of the second end, and the shape of the outer surface of the to-be-annealed part matches the cross-sectional shape of the first jig and the second jig.

[0016] The first jig is provided with a first limiting part, the second jig is provided with a second limiting part, and the second jig is arranged on the first jig through the second limiting part and the first limiting part.

[0017] The opposite sides of the first jig are provided with notches, the notches serve as the first limiting parts, the opposite sides of the second jig are provided with bosses corresponding to the notches, and the bosses serve as the second limiting parts.

[0018] The application also provides an annealing device, which comprises a support assembly, a heating assembly and the auxiliary jig, the heating assembly and the auxiliary jig are arranged on the support assembly, the heating assembly is used for heating the to-be-annealed part on the auxiliary jig, so that the to-be-annealed part is annealed and shaped through the auxiliary jig.

[0019] The beneficial effects of the present application are: the annealing shaping auxiliary jig of the present application comprises a support inner core, a first jig and a second jig, the second jig is arranged on the first jig, and the first jig and the second jig form a containing space, and the support inner core sleeved with the to-be-annealed part is located in the containing space. The present application sleeves the to-be-annealed part on the support inner core, and uses the first jig and the second jig to anneal and shape the outer surface of the to-be-annealed part, while the support inner core anneals and shapes the inner surface of the to-be-annealed part. The auxiliary jig realizes simultaneous annealing of the inner and outer surfaces, and has the advantages of simple overall structure, easy operation and low cost. The auxiliary jig supports multiple to-be-annealed parts to simultaneously anneal and shape, and can realize efficient and consistent shaping effect in batch shaping production. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0021] Figure 1 is a structural schematic view of an embodiment of the to-be-annealed part provided by the present application;

[0022] Figure 2 is a front view of an embodiment of the auxiliary jig and multiple to-be-annealed parts provided by the present application;

[0023] Figure 3 is a side view of an embodiment of the auxiliary jig and multiple to-be-annealed parts provided by the present application;

[0024] Figure 4 is a structural schematic view of an embodiment of the first jig in Figure 2

[0025] Figure 5 is a structural schematic view of an embodiment of the second jig in Figure 2

[0026] Figure 6 is a structural schematic view of an embodiment of the support inner core in Figure 2 DETAILED DESCRIPTION

[0027] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0028] ​​​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0030] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to the other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.

[0031] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0032] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0033] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0034] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected between them, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] For products of a specific shape, the traditional annealing stress relief method may not provide sufficient shaping effect, especially after deformation occurs during product production, the product needs to be annealed and stress relieved by an auxiliary jig to restore the shape and performance of the product. However, the existing auxiliary jig design often has the problems of complex structure, inconvenient operation, high cost, and it is difficult to achieve efficient and consistent shaping effect in batch shaping production.

[0036] Referring to Figure 1 as shown, Figure 1 is a structural schematic diagram of an embodiment of the annealing object provided by the present application. The annealing object 40 of the embodiment can be a flat tube of a predetermined shape, for example, the annealing object 40 is an elliptical flat tube. Since the annealing object 40 is prone to deformation, such as convex outward or concave inward, it needs to be annealed and shaped by an auxiliary jig.

[0037] The material of the flat tube can include but is not limited to aluminum alloy material, which is usually used to manufacture a flat tube with microchannels, and the flat tube with microchannels is usually applied to air conditioning or refrigeration systems as a core component of a heat exchanger.

[0038] The present application provides an annealing and shaping auxiliary jig. Please refer to Figures 1-3 as shown, Figure 2 is a front view of an embodiment of the auxiliary jig and the plurality of annealing objects provided by the present application; Figure 3 is a side view of an embodiment of the auxiliary jig and the plurality of annealing objects provided by the present application. The auxiliary jig 1 of the embodiment includes a first jig 10, a supporting inner core 20 and a second jig 30.

[0039] At least one annealing object 40 is sleeved on the supporting inner core 20. For example, one annealing object 40 is sleeved on the supporting inner core 20; or a plurality of annealing objects 40 are sleeved on the supporting inner core 20.

[0040] The supporting inner core 20 sleeved with the annealing object 40 is arranged on the first jig 10, that is, after the plurality of annealing objects 40 are sleeved on the supporting inner core 20, the supporting inner core 20 is placed on the first jig 10.

[0041] The second jig 30 is arranged on the first jig 10, and the second jig 30 and the first jig 10 form a containing space, and the support inner core 20 sleeved with the to-be-annealed part 40 is located in the containing space. For example, the second jig 30 can be installed on the first jig 10 by means of clamping, bolts, pins, etc.

[0042] The first jig 10 and the second jig 30 are used for annealing and shaping the outer surface of the to-be-annealed part 40, and the support inner core 20 is used for annealing and shaping the inner surface of the to-be-annealed part 40, so as to obtain an annealed part.

[0043] In some embodiments, the support inner core 20 sleeved with the to-be-annealed part 40 is arranged on the first jig 10, and the second jig 30 is installed on the first jig 10. The first jig 10 and the second jig 30 are in contact with the outer surface of the to-be-annealed part 40 to anneal and shape the outer surface of the to-be-annealed part 40. At this time, the support inner core 20 is in contact with the inner surface of the to-be-annealed part 40 to anneal and shape the inner surface of the to-be-annealed part 40, thereby obtaining an annealed part.

[0044] For example, the first jig 10 and the second jig 30 apply pressure to the outer surface of the to-be-annealed part 40, and the support inner core 20 is used for providing a supporting force to the inner surface of the to-be-annealed part 40. The first jig 10, the second jig 30 and the support inner core 20 are used to simultaneously anneal and shape the outer surface and the inner surface of the to-be-annealed part 40.

[0045] In this embodiment, the to-be-annealed part 40 is sleeved on the support inner core 20, the support inner core 20 sleeved with the to-be-annealed part 40 is located in the containing space of the first jig 10 and the second jig 30, the outer surface of the to-be-annealed part 40 is annealed and shaped by the first jig 10 and the second jig 30, and the inner surface of the to-be-annealed part 40 is annealed and shaped by the support inner core 20. The inner surface and the outer surface of the to-be-annealed part 40 are simultaneously annealed and shaped by the auxiliary jig 1. The overall structure is simple, the operation is simple, the cost is low, and the auxiliary jig 1 supports multiple to-be-annealed parts 40 to simultaneously anneal and shape. The auxiliary jig 1 can realize efficient and consistent shaping effect in batch shaping production.

[0046] According to some embodiments of the present application, please refer to Figure 4 Figure 4 is Figure 2 the structure schematic diagram of an embodiment of the first jig. The first jig 10 of this embodiment is provided with a groove 11.

[0047] The first jig 10 is provided with a groove 11 on the side close to the second jig 30. The cross-sectional shape of the groove 11 includes but is not limited to an elliptical shape, a circular shape, a square shape or an irregular shape, etc. The cross-sectional shape of the groove 11 of this embodiment matches the cross-sectional shape of the annealed part, for example, the cross-sectional shape of the groove 11 is an elliptical shape. ​

[0048] The groove 11 is provided along the length direction of the first fixture 10. In other embodiments, the groove 11 may be provided along the width direction of the first fixture 10.

[0049] A support core 20, on which the part to be annealed 40 is fitted, is disposed in a groove 11, so that the support core 20 on which the part to be annealed 40 is fitted is disposed on the first fixture 10. The groove 11 of the first fixture 10 and the second fixture 30 form an accommodating space.

[0050] In other embodiments, the second fixture 30 may also have a groove on the side near the first fixture 10. The second fixture 30 is disposed on the first fixture 10, and the groove of the second fixture 30 and the groove 11 of the first fixture 10 form an accommodating space.

[0051] The first fixture 10 in this embodiment is provided with a groove 11, and the support inner core 20 on which the part to be annealed 40 is sleeved is disposed in the groove 11. The groove 11 positions the support inner core 20 on which the part to be annealed 40 is sleeved, so as to prevent it from moving during the annealing and shaping process of the part to be annealed 40.

[0052] According to some embodiments of this application, such as Figure 4 As shown, the first fixture 10 is provided with a plurality of first mounting holes 12, which are located on both sides of the groove 11 and are spaced apart along the length of the first fixture 10. The first mounting holes 12 include, but are not limited to, threaded holes or through holes.

[0053] The number of first mounting holes 12 in the first fixture 10 includes, but is not limited to, 2, 3, 4, 5, and 6. For example, the first fixture 10 may have 6 first mounting holes 12. Figure 4 As shown.

[0054] In this embodiment, multiple first mounting holes 12 are located on both sides of the groove 11, which can enhance the stability and balance of the entire auxiliary fixture 1 structure and reduce the deformation or damage of the auxiliary fixture 1 caused by improper installation.

[0055] According to some embodiments of this application, please refer to Figure 5 As shown, Figure 5 yes Figure 2 A schematic diagram of one embodiment of the second fixture. The second fixture 30 of this embodiment is provided with a plurality of second mounting holes 31, which correspond to a plurality of first mounting holes 12. The second mounting holes 31 include, but are not limited to, threaded holes or through holes.

[0056] The second fixture 30 is arranged on the first fixture 10, and the plurality of second mounting holes 31 correspond to the plurality of first mounting holes 12 one by one. For example, the first fixture 10 is provided with six first mounting holes 12, and the second fixture 30 is provided with six second mounting holes 31.

[0057] In the embodiment, the plurality of second mounting holes 31 correspond to the plurality of first mounting holes 12, which ensures that the second fixture 30 is aligned with the first fixture 10, and improves the assembly accuracy of the overall structure.

[0058] According to some embodiments of the present application, as shown in Figure 2 and Figure 3 The auxiliary fixture 1 further comprises a plurality of fixing members 50. The fixing members 50 include, but are not limited to, screws or pins.

[0059] The plurality of fixing members 50 are arranged corresponding to the plurality of second mounting holes 31 and the plurality of first mounting holes 12 respectively. The fixing member 50 is arranged through the first mounting hole 12 and the corresponding second mounting hole 31, and the fixing member 50 is used to connect the second fixture 30 and the first fixture 10. For example, the number of the plurality of fixing members 50 is six, the number of the plurality of first mounting holes 12 is six, and the number of the plurality of second mounting holes 31 is six.

[0060] In the embodiment, the fixing member 50 is arranged through the first mounting hole 12 and the second mounting hole 31 to connect the second fixture 30 and the first fixture 10. The fixing member 50 facilitates the installation and disassembly of the second fixture 30 and the first fixture 10, facilitates maintenance and adjustment, and improves the convenience of maintenance work.

[0061] According to some embodiments of the present application, please refer to Figure 6 as shown, Figure 6 is Figure 2 a structural schematic diagram of an embodiment of the support inner core. The support inner core 20 has a first end 21 and a second end 22.

[0062] The first end 21 and the second end 22 of the support inner core 20 are integrally formed. The cross-sectional area of the first end 21 is smaller than the cross-sectional area of the second end 22, and at least one annealing object 40 is sleeved on the second end 22 through the first end 21.

[0063] In some embodiments, the cross-sectional area of the first end 21 is smaller than the cross-sectional area of the second end 22, and the cross-sectional area of the first end 21 is smaller than the cross-sectional area of the annealing object 40, so that the at least one annealing object 40 is sleeved on the second end 22 through the first end 21. In other embodiments, the side of the first end 21 away from the second end 22 is arranged with a chamfer, so that the at least one annealing object 40 is sleeved into the first end 21.

[0064] The first end 21 has a cross-sectional area smaller than that of the second end 22, so that the at least one annealing piece 40 can be sleeved onto the second end 22 through the first end 21, thereby improving the convenience of operation.

[0065] According to some embodiments of the present application, the inner surface of the annealing piece matches the cross-sectional shape of the second end 22, and the outer surface of the annealing piece matches the cross-sectional shape of the first jig 10 and the second jig 30.

[0066] The support inner core 20 is sleeved with the annealing piece 40, and the support inner core 20 sleeved with the annealing piece 40 is located in the accommodation space of the first jig 10 and the second jig 30. The outer surface of the annealing piece 40 is annealed and shaped by the first jig 10 and the second jig 30, and the inner surface of the annealing piece 40 is annealed and shaped by the support inner core 20, thereby obtaining the annealing piece. Therefore, the inner surface of the annealing piece matches the cross-sectional shape of the second end 22, and the outer surface of the annealing piece matches the cross-sectional shape of the first jig 10 and the second jig 30.

[0067] For example, the outer surface of the annealing piece is elliptical, the inner surface of the annealing piece is also elliptical, the cross-sectional shape of the second end 22 of the support inner core 20 is elliptical, and the cross-sectional shape of the first jig 10 and the second jig 30 is elliptical.

[0068] According to some embodiments of the present application, as shown in Figure 4 and Figure 5 The first jig 10 is provided with a first limiting portion 13, and the second jig 30 is provided with a second limiting portion 32. The second jig 30 is arranged on the first jig 10 through the second limiting portion 32 and the first limiting portion 13.

[0069] In some embodiments, the second limiting portion 32 and the first limiting portion 13 cooperate to fix or arrange the second jig 30 on the first jig 10. The cooperation mode of the second limiting portion 32 and the first limiting portion 13 includes but is not limited to insertion, clamping, locking or other mechanical connection modes.

[0070] The first limiting portion 13 and the second limiting portion 32 realize the fool-proof design, improve the accuracy of the installation of the second jig 30 on the first jig 10, and improve the connection stability between the second jig 30 and the first jig 10.

[0071] According to some embodiments of the present application, as shown in Figure 4 and Figure 5 The opposite sides of the first jig 10 are provided with notches as the first limiting portion 13, and the opposite sides of the second jig 30 are provided with bosses corresponding to the notches as the second limiting portion 32.

[0072] The embodiment realizes the fool-proof design through the gap of the first limiting part 13 and the boss of the second limiting part 32, improves the accuracy of the installation of the second jig 30 on the first jig 10, and improves the connection stability between the second jig 30 and the first jig 10.

[0073] The application also provides an annealing device, which comprises a supporting assembly, a heating assembly and the auxiliary jig 1.

[0074] The heating assembly and the auxiliary jig 1 are arranged on the supporting assembly. For example, the heating assembly is fixedly installed on the supporting assembly, and the auxiliary jig 1 is placed on the supporting assembly. The heating assembly is used for heating the to-be-annealed part 40 on the auxiliary jig 1, so that the to-be-annealed part 40 is annealed and shaped through the auxiliary jig 1.

[0075] The annealing device includes, but is not limited to, a box-type annealing furnace, a pit-type annealing furnace, a vacuum annealing furnace, a continuous annealing furnace, an intermittent annealing furnace and the like.

[0076] In some embodiments, after the heating assembly in the annealing device is heated to a certain temperature, the auxiliary jig 1 is placed on the supporting assembly of the annealing device, the to-be-annealed part 40 is annealed to relieve stress, and the annealing and shaping of the inner surface and the outer surface are realized at the same time through the auxiliary jig 1, so that the annealed part is obtained.

[0077] In summary, the application sets the to-be-annealed part 40 on the supporting inner core 20, and utilizes the first jig 10 and the second jig 30 to anneal and shape the outer surface of the to-be-annealed part 40, while the supporting inner core 20 anneals and shapes the inner surface of the to-be-annealed part 40. The inner and outer surfaces are simultaneously annealed through the auxiliary jig 1, and the overall structure is simple, easy to operate and low in cost. The auxiliary jig 1 supports multiple to-be-annealed parts 40 to simultaneously anneal and shape, and can realize efficient and consistent shaping effect in batch shaping production.

[0078] The above description is only the implementation of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation based on the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. An auxiliary fixture for annealing and shaping, characterized in that, include: A supporting core, on which at least one part to be annealed is fitted; The first fixture, on which the supporting inner core of the work to be annealed is disposed; The second fixture is disposed on the first fixture, and the first fixture and the second fixture form a receiving space, in which the supporting inner core on which the part to be annealed is fitted is located; The first fixture and the second fixture are used to anneal and shape the outer surface of the part to be annealed, and the supporting inner core is used to anneal and shape the inner surface of the part to be annealed, so as to obtain the annealed part.

2. The auxiliary fixture according to claim 1, characterized in that, The first fixture is provided with a groove, which is provided along the length of the first fixture, and the supporting inner core on which the part to be annealed is sleeved is provided in the groove.

3. The auxiliary fixture according to claim 2, characterized in that, The first fixture is provided with a plurality of first mounting holes, which are located on both sides of the groove and are spaced apart along the length of the first fixture.

4. The auxiliary fixture according to claim 3, characterized in that, The second fixture is provided with a plurality of second mounting holes, and the plurality of second mounting holes are provided in correspondence with the plurality of first mounting holes.

5. The auxiliary fixture according to claim 4, characterized in that, The auxiliary fixture also includes multiple fasteners, which pass through the first mounting hole and the corresponding second mounting hole to connect the second fixture to the first fixture.

6. The auxiliary fixture according to claim 1, characterized in that, The supporting inner core has a first end and a second end, the cross-sectional area of ​​the first end is smaller than the cross-sectional area of ​​the second end, and the at least one part to be annealed is sleeved onto the second end through the first end.

7. The auxiliary fixture according to claim 6, characterized in that, The shape of the inner surface of the annealed part matches the cross-sectional shape of the second end, and the shape of the outer surface of the annealed part matches the cross-sectional shape of the first fixture and the second fixture.

8. The auxiliary fixture according to claim 4, characterized in that, The first fixture is provided with a first limiting part, and the second fixture is provided with a second limiting part. The second fixture is mounted on the first fixture through the second limiting part and the first limiting part.

9. The auxiliary fixture according to claim 8, characterized in that, The first fixture has notches on its opposite sides, which serve as the first limiting part. The second fixture has bosses on its opposite sides corresponding to the notches, which serve as the second limiting part.

10. An annealing apparatus, characterized in that, The annealing apparatus includes a support assembly, a heating assembly, and an auxiliary fixture as described in any one of claims 1-9. The heating assembly and the auxiliary fixture are disposed on the support assembly. The heating assembly is used to heat the workpiece to be annealed on the auxiliary fixture so that the workpiece to be annealed is annealed and shaped by the auxiliary fixture.

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