Auxiliary clamp for forming core rod

Abstract

The utility model discloses a core rod forming auxiliary clamp, and belongs to the technical field of core rod forming equipment. The bearing groove matched with the core rod in shape is formed in the bearing piece in the core rod forming auxiliary clamp, and after the core rod is placed in the bearing groove, the core rod and the bearing piece are stably connected through the fastening connecting piece. Thus, through the specially designed clamp, the core rod is accurately fixed in the bearing piece, it is ensured that the shape of the core rod is kept stable in the forming process, and shape errors caused by uneven stress of materials in a traditional method are avoided. In the subsequent heat treatment process, the clamp and the core rod are heated to a proper temperature together, so that the core rod is accurately formed according to the design requirement, the dimensional tolerance of the bent part of the core rod is controlled within 0.05 mm, the forming precision and the product consistency are remarkably improved, and the quality and the consistency of extrusion forming products are improved.

Description

Technical Field

[0001] This application relates to the field of core rod forming equipment technology, and in particular to a core rod forming auxiliary fixture. Background Technology

[0002] like Figure 1 The image shows one type of irregular mandrel, which is mainly used in extrusion molding of parts in powder metallurgy molds. It requires specific shape and strength and meets tolerance standards.

[0003] However, in existing manufacturing methods, the uneven stress during bending of irregularly shaped core rods has a significant impact on their shape and tolerances, resulting in a low product yield. Utility Model Content

[0004] This application provides a mandrel forming auxiliary fixture. It can solve the problem in the prior art where uneven bending stress during mandrel fabrication affects its shape and tolerances. The technical solution is as follows:

[0005] On the one hand, a core rod forming auxiliary fixture is provided for installing a curved core rod. The core rod forming auxiliary fixture includes: a bearing member and a fastening connector.

[0006] The outer surface of the support member has a support groove that matches the shape of the core rod. The support groove is used to load the core rod, and the depth of the support groove is greater than the diameter of the core rod.

[0007] The fastening connector is sleeved on the outside of the bearing member and is used to limit the core rod within the bearing groove.

[0008] Optionally, the outer surface of the carrier has two carrier grooves corresponding to the two core rods. Each carrier groove includes a first groove section that is spiral and a second groove section that is straight. One end of the first groove section is smoothly connected to one end of the second groove section. The first groove section extends spirally along the length direction of the carrier.

[0009] Optionally, the support member is rod-shaped and includes: a first part and a second part that are detachably connected, the first part being provided with a first groove, the second part being provided with a second groove, and the extending direction of the second groove being parallel to the axial direction of the second part.

[0010] Optionally, the first part has a positioning groove communicating with the first segment groove at one end facing the second part, and the second part has a positioning protrusion that cooperates with the positioning groove at one end facing the first part.

[0011] Optionally, the positioning protrusion has two positioning snap-fit ​​inclined surfaces symmetrically arranged along the second groove section, and the intersection of the two positioning snap-fit ​​inclined surfaces forms a positioning straight edge, which is perpendicular to the second groove section.

[0012] Optionally, the core rod forming auxiliary fixture further includes a fixing sleeve, which is sleeved and fixed at the connection between the first part and the second part after the positioning protrusion is engaged with the positioning groove.

[0013] Optionally, the side of the fixing sleeve has multiple through holes, which are arranged in multiple groups along the axial direction of the fixing sleeve, and each group of through holes includes multiple through holes arranged in a circumferential array along the fixing sleeve.

[0014] Optionally, multiple sets of through holes are distributed at equal intervals along the axial direction of the fixing sleeve, and multiple through holes in each set are distributed at equal intervals along the circumferential direction of the fixing sleeve.

[0015] Optionally, the number of fastening connectors is multiple, and the multiple fastening connectors are distributed in an array along the axial direction of the bearing member; and / or, the fastening connectors are spiral structures formed by winding iron wire.

[0016] Optionally, the support component is made of 40Cr steel.

[0017] The beneficial effects of the technical solutions provided in this application include at least the following:

[0018] By incorporating a support groove in the mandrel forming auxiliary fixture that matches the shape of the mandrel, the mandrel is placed within the support groove and then securely connected to the support using fastening connectors. This specially designed fixture precisely fixes the mandrel within the support, ensuring its shape remains stable during the forming process and avoiding shape errors caused by uneven material stress in existing methods. During subsequent heat treatment, the fixture and mandrel are heated together to an appropriate temperature, ensuring the mandrel is precisely formed according to design requirements. This results in dimensional tolerances of the bent portion of the mandrel being controlled within 0.05 mm, significantly improving forming accuracy and product consistency, thereby enhancing the quality and consistency of extruded products. It should be noted that the support component in the fixture can be machined, and the forming accuracy of the mandrel can be ensured by controlling the precision of the support component. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a core rod forming auxiliary fixture provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a combination of a core rod forming auxiliary fixture and a core rod provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of another combination of a core rod forming auxiliary fixture and a core rod provided in an embodiment of this application;

[0023] Figure 4 This is an exploded view of a core rod forming auxiliary fixture provided in an embodiment of this application;

[0024] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0025] Among them, the core rod forming auxiliary fixture 000, core rod A, bearing component 100, fastening connector 200, bearing groove 101, first section core rod A1, second section core rod A2, first section groove 101a, second section groove 101b, first part B1, second part B2, positioning groove a1, positioning protrusion a2, through hole b1, and fixing sleeve 300.

[0026] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a core rod forming auxiliary fixture provided in an embodiment of this application. Figure 2 This is a schematic diagram illustrating the combination of a mandrel forming auxiliary fixture and a mandrel according to an embodiment of this application. The mandrel forming auxiliary fixture 000 can be used to install a bent mandrel A. The mandrel forming auxiliary fixture 000 may include a support member 100 and a fastening connector 200. For example, the mandrel A may be a structure made of spring steel, and the support member 100 and the fastening connector 200 may be structures made of steel, for example, the support member 100 may be 40Cr steel.

[0031] The outer surface of the support member 100 in the mandrel forming auxiliary fixture 000 may have a support groove 101 that matches the shape of the mandrel A. The support groove 101 in the support member 100 can be used to support the mandrel A, and the depth of the support groove 101 may be greater than the diameter of the mandrel A. That is, the function of this fixture is to press the mandrel, which is straight before processing, into the support groove 101, and to shape the mandrel into the required curved shape according to the design dimensions through a heat treatment process.

[0032] The fastening connector 200 in the core rod forming auxiliary fixture 000 can be sleeved on the outside of the carrier 100 and can be used to limit the core rod A in the carrier groove 101 in the carrier 100.

[0033] In this embodiment, a support groove 101 matching the shape of the mandrel A is provided in the support member 100 of the mandrel forming auxiliary fixture A. After the mandrel A is placed in the support groove 101, it is stably connected to the support member 100 by a fastening connector 200. Thus, the specially designed fixture precisely fixes the mandrel A within the support member 100, ensuring that the shape of the mandrel A remains stable during the forming process, avoiding shape errors caused by uneven material stress in traditional methods. During subsequent heat treatment, the fixture and the mandrel are heated together to an appropriate temperature, ensuring that the mandrel is precisely formed according to design requirements. This allows the dimensional tolerance of the bent portion of the mandrel to be controlled within 0.05 mm, significantly improving forming accuracy and product consistency, thereby improving the quality and consistency of the extruded product. It should be noted that the support member 100 in the fixture can be prepared by machining, and the forming accuracy of the mandrel A can be ensured by controlling the precision of the support member 100.

[0034] Optional, please refer to Figure 3 , Figure 3 This is a schematic diagram of another combination of a mandrel forming auxiliary fixture and a mandrel A provided in an embodiment of this application. There can be two mandrels A, each mandrel A including a spiral-shaped first segment A1 and a straight segment A2, with the two first segments A1 forming a double-helix structure. The outer surface of the support member 100 can have two support grooves 101 corresponding to the two mandrels A. Each support groove 101 can include a spiral-shaped first groove segment 101a and a straight segment 101b, with one end of the first groove segment 101a smoothly connected to one end of the second groove segment 101b. The first groove segment 101a can extend spirally along the length of the support member 100. In this case, during heat treatment, the fixture and the mandrel A are heated together to an appropriate temperature to ensure that the mandrel A has sufficient flexibility during the forming process, facilitating precise forming according to design requirements. This ensures the stability of the pitch and helical shape, avoiding the pitch fluctuation problem in traditional methods, thereby improving the quality and consistency of the extruded product. Here, the shaped mandrel can be reused to make a double-helix extruded mandrel.

[0035] In the embodiments of this application, such as Figure 3As shown, the support member 100 can be rod-shaped and may include a detachably connected first part B1 and a second part B2. The first part B1 of the support member 100 may be provided with a first groove 101a, and the second part B2 of the support member 100 may be provided with a second groove 101b, and the extending direction of the second groove 101b may be parallel to the axial direction of the second part B2 of the support member 100. In this case, by setting the support member 100 as two detachably connected parts, and machining grooves on each part, the connection accuracy at the transition point after the first groove 101a and the second groove 101b are connected is ensured while maintaining the machining accuracy of each groove. Furthermore, when machining core rods A with different structures, different first parts B1 or second parts B2 can be replaced according to the structure of core rod A, achieving a modular design.

[0036] Optional, please refer to Figure 4 and Figure 5 , Figure 4 This is an exploded view of a core rod forming auxiliary fixture provided in an embodiment of this application. Figure 5 yes Figure 4 A partially enlarged schematic diagram is shown. The end of the first part B1 of the carrier 100 facing the second part B2 may have a positioning groove a1 communicating with the first section groove 101a, and the end of the second part B2 of the carrier 100 facing the first part B1 may have a positioning protrusion a2 that mates with the positioning groove a1. Thus, the insertion design of the positioning groove a1 and the positioning protrusion a2 facilitates both the assembly and disassembly of the carrier 100 and the standardization of its various parts. Of course, in other embodiments, the first part B1 and the second part B2 of the carrier 100 may also be connected by threads or other methods.

[0037] Here, as Figure 5 As shown, the positioning protrusion a2 may have two positioning and engaging inclined surfaces m symmetrically arranged along the second segment of the groove. The intersection of the two positioning and engaging inclined surfaces m forms a positioning straight edge L, which is perpendicular to the second segment of the groove 101b. This ensures the machining positional accuracy of both parts and improves the docking accuracy of the first segment of the groove 101a and the second segment of the groove 101b after the first part B1 and the second part B2 are docked.

[0038] For example, the core rod forming auxiliary fixture 000 may further include a fixing sleeve 300. After the positioning protrusion a2 is engaged with the positioning groove a1, the fixing sleeve 300 can be sleeved and fixed at the connection between the first part B1 and the second part B2. In this case, the first part B1 and the second part B2 in the carrier 100 can ensure their docking accuracy through the cooperation of the positioning groove a1 and the positioning protrusion a2, and then the fixing sleeve 300 can be used to fasten the first part B1 and the second part B2 in the carrier 100. Here, the diameters of the first part B1 and the second part B2 in the carrier 100 can be the same, and the fixing sleeve 300 can be connected to the carrier 100 through an transition fit.

[0039] In this application, the side of the fixing sleeve 300 may have multiple through holes b1. In this case, by providing multiple through holes b1 on the side of the fixing sleeve 300, heat can be transferred through the multiple through holes b1 during the heat treatment process, ensuring that heat treatment can be performed at all positions of the core rod A. For example, the multiple through holes b1 in the fixing sleeve 300 may be arranged in multiple groups along the axial direction of the fixing sleeve 300, and each group of through holes b1 may include multiple through holes b1 arranged in a circumferential array along the fixing sleeve 300.

[0040] For example, multiple sets of through holes b1 in the fixed sleeve 300 can be distributed at equal intervals along the axial direction of the fixed sleeve 300, and multiple through holes in each set of through holes b1 can be distributed at equal intervals along the circumferential direction of the fixed sleeve 300.

[0041] Optionally, the number of fastening connectors 200 in the core rod forming auxiliary fixture 000 can be multiple, and the multiple fastening connectors 200 can be arranged in an array along the axial direction of the support member 100. In this case, the multiple fastening connectors 200 can achieve a stable connection between the core rod A and the support member 100. For example, the multiple fastening connectors 200 can be evenly spaced along the axial direction of the support member 100. For example, each fastening connector 200 can be a ring clamp structure made of wound iron wire.

[0042] In other possible implementations, the fastening connector 200 can be a spiral structure formed by a single wire, or it can be multiple fastening connectors and a spiral fastening connector that simultaneously limits the bearing 100 and the core rod A.

[0043] In summary, this application provides a mandrel forming auxiliary fixture, which may include a carrier 100 and a fastening connector 200. By providing a carrier groove 101 matching the shape of the mandrel A in the carrier 100 of the mandrel forming auxiliary fixture 000, the mandrel A is placed in the carrier groove 101, and then the fastening connector 200 stably connects the mandrel A to the carrier 100. Thus, through the specially designed fixture, the mandrel A is precisely fixed within the carrier 100, ensuring that the shape of the mandrel A remains stable during the forming process, avoiding shape errors caused by uneven material stress in traditional methods. In the subsequent heat treatment process, the fixture and the mandrel are heated together to an appropriate temperature, ensuring that the mandrel is precisely formed according to the design requirements, so that the dimensional tolerance of the bent portion of the mandrel is controlled within 0.05 mm, significantly improving forming accuracy and product consistency, thereby improving the quality and consistency of the extruded product. It should be noted that the carrier 100 in the fixture can be prepared by machining, and the forming accuracy of the mandrel A can be ensured by controlling the accuracy of the carrier 100.

[0044] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0045] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A core rod forming assist jig characterized by, The core rod forming auxiliary fixture is used for mounting a core rod in a bent shape, and comprises a bearing member and a fastening connecting member; An outer side surface of the bearing member has a bearing groove matching the shape of the core rod, the bearing groove being used for loading the core rod, and the depth of the bearing groove being greater than the diameter of the core rod; The fastening connecting member is sleeved on the outer side of the bearing member, and is used for limiting the core rod in the bearing groove.

2. The core-rod forming assist clamp according to claim 1, characterized by, The outer side surface of the bearing member has two bearing grooves corresponding to two core rods, each of the bearing grooves comprising a first segment groove body in a spiral shape and a second segment groove body in a straight line segment, one end of the first segment groove body being smoothly connected with one end of the second segment groove body, and the first segment groove body extending spirally along the length direction of the bearing member.

3. The core-rod forming assist clamp according to claim 2, wherein The bearing member is in a rod shape, and comprises a first part and a second part which are detachably connected, the first part being provided with the first segment groove body, the second part being provided with the second segment groove body, and the extension direction of the second segment groove body being parallel to the axial direction of the second part.

4. The core-rod forming assist clamp according to claim 3, characterized by One end of the first part towards the second part has a positioning groove in communication with the first segment groove body, and one end of the second part towards the first part has a positioning protrusion matched with the positioning groove.

5. The core-rod forming assist clamp according to claim 4, wherein The positioning protrusion has two positioning clamping inclined surfaces symmetrically arranged along the second segment groove body, and a positioning straight edge is formed at the intersection of the two positioning clamping inclined surfaces, and the positioning straight edge is arranged perpendicularly to the second segment groove body.

6. The core-rod forming assist clamp according to claim 4, wherein The core rod forming auxiliary fixture further comprises a fixing sleeve, which is sleeved and fixed at the connection between the first part and the second part after the positioning protrusion is clamped into the positioning groove.

7. The core-rod forming assist clamp according to claim 6, wherein An outer side surface of the fixing sleeve has a plurality of through holes, and the plurality of through holes are arranged in groups along the axial direction of the fixing sleeve, and each group of the through holes comprises a plurality of through holes arranged in an array along the circumferential direction of the fixing sleeve.

8. The core-rod forming assist clamp according to claim 7, characterized by The plurality of groups of the through holes are distributed equidistantly along the axial direction of the fixing sleeve, and the plurality of through holes in each group of the through holes are distributed equidistantly along the circumferential direction of the fixing sleeve.

9. A core-rod forming aid jig according to any one of claims 1 to 8, wherein The number of the fastening connecting members is plural, and the plurality of fastening connecting members are arranged in an array along the axial direction of the bearing member; and / or, the fastening connecting member is a spiral structure formed by winding a wire.

10. A core rod forming aid jig according to any one of claims 1 to 8, characterised in that, The bearing member is made of 40Cr steel.

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