Joint composite core structure for stretch bending

Abstract

The joint composite core structure for stretch bending comprises an oil cylinder connecting block, and the end of the oil cylinder connecting block is sequentially and movably connected with a first joint core, a second joint core, a third joint core and a fourth joint core. The oil cylinder connecting block is movably connected with the first joint core through a first connecting shaft; the first joint core and the second joint core are movably connected through a second connecting shaft; the second joint core and the third joint core are movably connected through a third connecting shaft; and the third joint core and the fourth joint core are movably connected through a fourth connecting shaft. According to the utility model, the radian of a finished product can be fitted along with material forming, the problems of narrowing and wrinkling are solved, the device is suitable for internal support of products with various cavity sections, the device is simple to mount, convenient to maintain, economical and practical, and the product percent of pass is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of support cores, and more particularly to a jointed composite core structure for bending. Background Technology

[0002] During the stretch bending process, both ends of the material need to be clamped. However, for products with hollow cross-sections, direct clamping will cause deformation, so a core support unit needs to be added at the clamping position. For example, for tubular products, not only do the end clamping require core support, but the bends also need core support to avoid defects such as narrowing and wrinkling. Traditional cores generally cannot be adjusted according to the curvature of the product being formed, which limits their use. Utility Model Content

[0003] The present invention aims to address the shortcomings of the prior art by providing a jointed composite core structure for bending and tension.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] A composite core structure for bending and stretching includes a hydraulic cylinder connecting block, with a first joint core, a second joint core, a third joint core, and a fourth joint core sequentially and movably connected to the end of the hydraulic cylinder connecting block.

[0006] The cylinder connecting block end is provided with a first arc-shaped through groove, which extends through both ends. The first joint core is provided with a first arc-shaped mounting groove on the side facing the cylinder connecting block end, which is closed at both ends. The first connecting shaft is installed in both the first arc-shaped through groove and the first arc-shaped mounting groove.

[0007] The first joint core end is provided with a second arc-shaped through groove, which extends through both ends. The second joint core is provided with a second arc-shaped mounting groove on the side facing the end of the first joint core. The second arc-shaped mounting groove is closed at both ends. The second connecting shaft is installed in both the second arc-shaped through groove and the second arc-shaped mounting groove.

[0008] The second joint core has a third arc-shaped through groove at its end, with both ends of the third arc-shaped through groove passing through. The third joint core has a third arc-shaped mounting groove on the side facing the end of the second joint core, with both ends of the third arc-shaped mounting groove closed. The third connecting shaft is installed in both the third arc-shaped through groove and the third arc-shaped mounting groove.

[0009] The third joint core end is provided with a fourth arc-shaped through groove, which extends through both ends. The fourth joint core is provided with a fourth arc-shaped mounting groove on the side facing the end of the third joint core. The fourth arc-shaped mounting groove is closed at both ends. The fourth connecting shaft is installed in both the fourth arc-shaped through groove and the fourth arc-shaped mounting groove.

[0010] The first joint core has several first limiting grooves on its end face, and the second joint core has several first limiting posts on its end face facing the first joint core. The size of the first limiting post is smaller than that of the first limiting groove, and the first limiting post is set in the corresponding first limiting groove.

[0011] The second joint core has several second limiting grooves on its end face facing the third joint core, and the third joint core has several second limiting posts on its end face facing the second joint core. The size of the second limiting posts is smaller than that of the second limiting grooves, and the second limiting posts are set in the corresponding second limiting grooves.

[0012] The first joint core has several third limiting posts on its end face, and the second joint core has several third limiting grooves on its end face facing the first joint core. The size of the third limiting posts is smaller than that of the third limiting grooves, and the third limiting posts are set in the corresponding third limiting grooves.

[0013] The second joint core has several fourth limiting posts on its end face facing the third joint core, and the third joint core has several fourth limiting grooves on its end face facing the second joint core. The size of the fourth limiting posts is smaller than that of the fourth limiting grooves, and the fourth limiting posts are set in the corresponding fourth limiting grooves.

[0014] The beneficial effects of this utility model are: this utility model will fit the curvature of the finished product after the material is formed, solving the problems of narrowing and wrinkling. It is suitable for internal support of products with various cavity cross sections, is easy to install and maintain, economical and practical, and improves the product qualification rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Sectional view of AA;

[0017] In the diagram: 1-First joint core; 2-Second joint core; 3-Third joint core; 4-Fourth joint core; 5-Hydraulic cylinder connecting block; 6-First connecting shaft; 7-Second connecting shaft; 8-Third connecting shaft; 9-Fourth connecting shaft; 10-First limiting groove; 11-First limiting post; 12-Second limiting groove; 13-Second limiting post; 14-Third limiting post; 15-Third limiting groove; 16-Fourth limiting post; 17-Fourth limiting groove; 18-Joint chain; 19-First arc-shaped through groove; 20-First arc-shaped mounting groove; 21-Second arc-shaped through groove; 22-Second arc-shaped mounting groove; 23-Third arc-shaped through groove; 24-Third arc-shaped mounting groove; 25-Fifth connecting shaft;

[0018] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0020] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] like Figure 1 , Figure 2 As shown, a joint composite core structure for bending and stretching includes a first joint core 1, a second joint core 2, a third joint core 3, a fourth joint core 4, a hydraulic cylinder connecting block 5, a first connecting shaft 6, a second connecting shaft 7, a third connecting shaft 8, a fourth connecting shaft 9, a first limiting groove 10, a first limiting post 11, a second limiting groove 12, a second limiting post 13, a third limiting post 14, a third limiting groove 15, a fourth limiting post 16, a fourth limiting groove 17, a joint chain 18, a first arc-shaped through groove 19, a first arc-shaped mounting groove 20, a second arc-shaped through groove 21, a second arc-shaped mounting groove 22, a third arc-shaped through groove 23, a third arc-shaped mounting groove 24, a fourth arc-shaped through groove, and a fourth arc-shaped mounting groove.

[0024] The rear end face of the hydraulic cylinder connecting block 5 is provided with an internal threaded hole for connection with the hydraulic cylinder. The hydraulic cylinder connecting block 5 is directly connected to the external threaded hydraulic cylinder and is extended or retracted by the hydraulic cylinder.

[0025] The hydraulic cylinder connecting block 5 serves both to connect to the hydraulic cylinder power source and to support the inner cavity of the round tube at the clamping position, preventing the cavity from being flattened.

[0026] The cylinder connecting block 5 is sequentially connected to the first joint core 1, the second joint core 2, the third joint core 3, and the fourth joint core 4.

[0027] The cylinder connecting block 5 has a first arc-shaped through groove 19 at one end, which extends through both ends. The first joint core 1 has a first arc-shaped mounting groove 20 on the side facing the cylinder connecting block 5, which is closed at both ends. The first connecting shaft 6 is installed in both the first arc-shaped through groove 19 and the first arc-shaped mounting groove 20.

[0028] The first joint core 1 has a second arc-shaped through groove 21 at one end, with both ends of the second arc-shaped through groove 21 passing through. The second joint core 2 has a second arc-shaped mounting groove 22 on the side facing the end of the first joint core 1, with both ends of the second arc-shaped mounting groove 22 closed. The second connecting shaft 7 is installed in both the second arc-shaped through groove 21 and the second arc-shaped mounting groove 22.

[0029] The second joint core 2 has a third arc-shaped through groove 23 at its end, with both ends of the third arc-shaped through groove 23 passing through. The third joint core 3 has a third arc-shaped mounting groove 24 on the side facing the end of the second joint core 2, with both ends of the third arc-shaped mounting groove 24 closed. The third connecting shaft 8 is installed in both the third arc-shaped through groove 23 and the third arc-shaped mounting groove 24.

[0030] The third joint core 3 has a fourth arc-shaped through groove at one end, which extends through both ends. The fourth joint core 4 has a fourth arc-shaped mounting groove on the side facing the end of the third joint core 3, which is closed at both ends. The fourth connecting shaft 9 is installed in both the fourth arc-shaped through groove and the fourth arc-shaped mounting groove.

[0031] The first joint core 1, the second joint core 2, the third joint core 3, and the fourth joint core 4 can simulate bending motion as the product is formed, playing a supporting role in the inner cavity and eliminating the problems of narrowing and wrinkling at the bends.

[0032] The first joint core 1 has a plurality of first limiting grooves 10 on its end face, and the second joint core 2 has a plurality of first limiting posts 11 on its end face facing the first joint core 1. The size of the first limiting post 11 is smaller than that of the first limiting groove 10, and the first limiting post 11 is set in the corresponding first limiting groove 10.

[0033] The second joint core 2 has a plurality of second limiting grooves 12 on its end face facing the third joint core 3, and the third joint core 3 has a plurality of second limiting posts 13 on its end face facing the second joint core 2. The size of the second limiting posts 13 is smaller than that of the second limiting grooves 12, and the second limiting posts 13 are set in the corresponding second limiting grooves 12.

[0034] The first joint core 1 has several third limiting posts 14 on its end face, and the second joint core 2 has several third limiting grooves 15 on its end face facing the first joint core 1. The size of the third limiting posts 14 is smaller than that of the third limiting grooves 15, and the third limiting posts 14 are set in the corresponding third limiting grooves 15.

[0035] The second joint core 2 has several fourth limiting posts 16 on its end face facing the third joint core 3, and the third joint core 3 has several fourth limiting grooves 17 on its end face facing the second joint core 2. The size of the fourth limiting posts 16 is smaller than that of the fourth limiting grooves 17, and the fourth limiting posts 16 are set in the corresponding fourth limiting grooves 17.

[0036] The corresponding limiting groove and limiting post structure design avoids the generation of wavy patterns during forming, resulting in high forming surface quality.

[0037] The third joint core 3 and the fourth joint core 4 are equipped with joint chains 18. The end of the fourth joint core 4 is equipped with a fifth connecting shaft 25. The fourth connecting shaft 9 and the fifth connecting shaft 25 are installed through the through holes of the joint chain 18.

[0038] This invention conforms to the curvature of the finished product as the material is formed, solving the problems of narrowing and wrinkling. It is suitable for internal support of products with various cavity cross-sections, is easy to install and maintain, economical and practical, and improves the product qualification rate.

[0039] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A jointed composite core structure for bending and tension, characterized in that, It includes a hydraulic cylinder connecting block (5), and the end of the hydraulic cylinder connecting block (5) is sequentially movably connected to a first joint core (1), a second joint core (2), a third joint core (3) and a fourth joint core (4); The cylinder connecting block (5) has a first arc-shaped through groove (19) at its end, with both ends of the first arc-shaped through groove (19) passing through. The first joint core (1) has a first arc-shaped mounting groove (20) on the side facing the end of the cylinder connecting block (5), with both ends of the first arc-shaped mounting groove (20) closed. The first connecting shaft (6) is installed in both the first arc-shaped through groove (19) and the first arc-shaped mounting groove (20). The first joint core (1) has a second arc-shaped through groove (21) at its end, with both ends of the second arc-shaped through groove (21) penetrating through. The second joint core (2) has a second arc-shaped mounting groove (22) on the side facing the end of the first joint core (1), with both ends of the second arc-shaped mounting groove (22) closed. The second connecting shaft (7) is installed in both the second arc-shaped through groove (21) and the second arc-shaped mounting groove (22). The end of the second joint core (2) is provided with a third arc-shaped through groove (23), which is through at both ends. The side of the third joint core (3) facing the end of the second joint core (2) is provided with a third arc-shaped mounting groove (24), which is closed at both ends. The third arc-shaped through groove (23) and the third arc-shaped mounting groove (24) are both equipped with a third connecting shaft (8). The third joint core (3) has a fourth arc-shaped through groove at its end, with both ends of the fourth arc-shaped through groove passing through. The fourth joint core (4) has a fourth arc-shaped mounting groove on the side facing the end of the third joint core (3), with both ends of the fourth arc-shaped mounting groove closed. The fourth connecting shaft (9) is installed in both the fourth arc-shaped through groove and the fourth arc-shaped mounting groove.

2. The articulated composite core structure for bending and tension according to claim 1, characterized in that, The first joint core (1) has several first limiting grooves (10) on its end face, and the second joint core (2) has several first limiting posts (11) on its end face facing the first joint core (1). The size of the first limiting post (11) is smaller than that of the first limiting groove (10), and the first limiting post (11) is set in the corresponding first limiting groove (10).

3. The articulated composite core structure for bending and tension according to claim 2, characterized in that, The second joint core (2) has several second limiting grooves (12) on its end face facing the third joint core (3), and the third joint core (3) has several second limiting posts (13) on its end face facing the second joint core (2). The size of the second limiting post (13) is smaller than that of the second limiting groove (12), and the second limiting post (13) is set in the corresponding second limiting groove (12).

4. The articulated composite core structure for bending and tension according to claim 3, characterized in that, The first joint core (1) has several third limiting posts (14) on its end face, and the second joint core (2) has several third limiting grooves (15) on its end face facing the first joint core (1). The size of the third limiting post (14) is smaller than that of the third limiting groove (15), and the third limiting post (14) is set in the corresponding third limiting groove (15).

5. The articulated composite core structure for bending and tension according to claim 4, characterized in that, The second joint core (2) has several fourth limiting posts (16) on its end face facing the third joint core (3), and the third joint core (3) has several fourth limiting grooves (17) on its end face facing the second joint core (2). The size of the fourth limiting post (16) is smaller than that of the fourth limiting groove (17), and the fourth limiting post (16) is set in the corresponding fourth limiting groove (17).

6. The articulated composite core structure for bending and tension according to claim 5, characterized in that, The rear end face of the hydraulic cylinder connecting block (5) is provided with an internal threaded hole for connecting with the hydraulic cylinder.

7. The articulated composite core structure for bending and tension according to claim 6, characterized in that, The third joint core (3) and the fourth joint core (4) are equipped with joint chains (18). The end of the fourth joint core (4) is equipped with a fifth connecting shaft (25). The fourth connecting shaft (9) and the fifth connecting shaft (25) are installed through the through holes of the joint chain (18).

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