Special edge folding forming cutter for transition connecting pipe
By designing a special bending forming tool and changing the stress conditions during the bending process, the problem of the curvature radius not meeting the requirements during cold bending of the turbocharger after-turbo transition connecting pipe of diesel engine was solved, achieving a high-efficiency and low-cost forming effect.
Patent Information
- Application Number
- CN202520031562.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In the existing technology, during the cold bending process of the turbocharger turbocharger transition connecting pipe, the bending tool and the contact part of the unfolded material are subjected to the same force, which causes the curvature radius after forming to not meet the requirements, resulting in an excessively large gap when splicing the 1/2 transition connecting pipe and making it impossible to fit together.
Design a bending forming tool specifically for transition connecting pipes. The lower part of the tool body is an arc transition surface, and one side of the upper part is a bending machine connection groove. The height difference between the two sides forms an included angle, which changes the stress situation during the bending process. It is made of 42CrMo alloy tempered steel.
By improving the bending forming tool, the curvature radius of the transition connecting tube after bending is ensured to meet the drawing requirements, the gap problem when splicing 1/2 transition connecting tubes is solved, production costs are reduced and forming accuracy is improved.
Smart Images
Figure CN223684254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to diesel engine production technical field, concretely relates to a special edge folding forming cutter for transition connecting pipe. BACKGROUND
[0002] The transition connecting pipe behind the turbocharger of diesel engine is one of the important parts connecting pipes with different shapes and diameters in exhaust pipe, so the forming size of the two ends of the transition connecting pipe is very high to ensure the butt joint. The parts with such structure are manufactured by casting or die pressing process in the past, but the production cost is high, so the cold bending forming process with low cost is tried in the manufacturing process of the transition connecting pipe, and the specific process flow is that the transition connecting pipe is divided into two along the center line, the plane unfolding is calculated and the blanking is carried out, then the bending guide line is calculated according to the unfolding drawing, the bending is formed by using the edge folding machine, and finally the two 1 / 2 transition connecting pipes are connected and spliced into a whole by welding.
[0003] In the manufacturing process of the above-mentioned transition connecting pipe, one end of the transition connecting pipe is approximately elliptical, one end is round, and the curvature radius of the elliptical port is greater than the round port. Because the bending tool of the edge folding machine is parallel to the 90-degree V-shaped groove at the bottom, the pressing force of the bending tool at the contact part of the unfolded material is consistent when bending, so that the curvature radius of the round side of the 1 / 2 transition connecting pipe after bending forming is greater than the size required by the design, the gap between the two 1 / 2 transition connecting pipes is too large to match when splicing, which causes the above-mentioned process scheme to be blocked. Therefore, it is necessary to improve. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problem: provide a kind of special edge folding forming cutter for transition connecting pipe, the utility model is to improve the cold bending of the above-mentioned transition connecting pipe, design a kind of bending tool specially used for the part, eliminate the force consistency of the bending tool at the contact part of the unfolded material when bending the transition connecting pipe, ensure that the curvature radius of the transition connecting pipe after bending forming meets the requirements of drawing, solve the problem that the gap between the two 1 / 2 transition connecting pipes is too large to match when splicing.
[0005] To achieve the above object, the utility model adopts the technical scheme of:
[0006] The special edge folding forming cutter for transition connecting pipe includes cutter body, the lower part of the cutter body is circular arc transition surface, one side of the upper part of the cutter body is bending machine connecting groove, the height H1 of one side edge I of the cutter body is less than the height H2 of the other side edge II, and the height difference formed by the side edge I and the side edge II forms the included angle a between the upper edge and the bottom edge of the cutter body.
[0007] Further, the length L of the tool body is greater than the bending guide line on the unfolded sheet when the transition connecting pipe is processed.
[0008] Further, the length L of the tool body is 400 mm, and the thickness of the tool body is 13 mm.
[0009] Further, the height H1 of the side edge I of the tool body is 177.5 mm, the height H2 of the side edge II of the tool body is 180 mm, and the height difference between the side edge I and the side edge II forms an included angle a between the upper edge and the bottom edge, and the included angle a is 0.36°.
[0010] Further, the circular arc transition surface is a circular arc surface with a radius of 5 mm.
[0011] Further, the sharp corner in the bending machine connecting groove is cleaned.
[0012] Further, the flange forming tool is made of 42CrMo alloy quenched and tempered steel.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] 1. The bending tool is designed for the cold bending improvement of the transition connecting pipe of the diesel engine supercharger, the bending tool changes the stress condition of the unfolded sheet of the transition connecting pipe in the bending process through the height difference between the two sides, eliminates the problem that the stress of the contact part between the bending tool and the unfolded sheet is consistent when the transition connecting pipe is bent, and ensures that the curvature radius of the transition connecting pipe after bending meets the requirements of the drawing;
[0015] 2. The tool has small manufacturing cost, is convenient to install and use, can ensure the size of the round port and the approximate oval port of the 1 / 2 transition connecting pipe after bending, and solves the problem that the two 1 / 2 transition connecting pipes cannot be matched due to the large time gap.
[0016] 3. The tool has novel design idea and simple structure, and can be quickly popularized to solve similar problems. DRAWINGS
[0017] Figure 1 It is a structure front view of the flange forming tool special for the utility model;
[0018] Figure 2 It is a structure left view of the flange forming tool special for the utility model;
[0019] Figure 3 It is a main view of the transition connecting pipe formed in the utility model;
[0020] Figure 4 is a left view of the transition connecting pipe formed in the utility model;
[0021] Figure 5 is an unfolding drawing and bending guide line drawing of the transition connecting pipe in the utility model;
[0022] Figure 6 is a bending schematic view of the transition connecting pipe using the special edge folding forming cutter in the embodiment of the utility model. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0024] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it should not be understood as a limitation on the utility model.
[0025] It should be noted that in this paper, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations. The element defined by the sentence "including a......" does not exclude the presence of another identical element in the process, method, article or device including the element.
[0026] Please refer to Figures 1-6 for detailed description of the embodiments of the utility model.
[0027] Embodiment: special edge folding forming cutter for transition connecting pipe, refer to Figures 1-2As shown, the said folding forming tool 1 comprises a tool body 1-1, the lower part of which is a circular arc transition surface 1-3, and one side of the upper part of the tool body 1-1 is a bending machine connecting groove 1-2, which is used to connect the bending machine. The height H1 of one side edge I 1-4 of the tool body 1-1 is less than the height H2 of the other side edge II 1-5, and the height difference between the side edge I 1-4 and the side edge II 1-5 forms an included angle a between the upper edge 1-6 and the bottom edge 1-7 of the tool body 1-1.
[0028] In a specific embodiment, the length L of the tool body 1-1 is slightly greater than the bending guide line 2-1 on the unfolded sheet when the over-connecting pipe 2 is processed.
[0029] Preferably, the length L of the tool body 1-1 is 400 mm, and the thickness of the tool body 1-1 is 13 mm.
[0030] Preferably, the height H1 of the side edge I 1-4 of the tool body 1-1 is 177.5 mm, and the height H2 of the side edge II 1-5 of the tool body 1-1 is 180 mm; the height difference between the side edge I 1-4 and the side edge II 1-5 forms an included angle a of 0.36° between the upper edge 1-6 and the bottom edge 1-7.
[0031] Preferably, the circular arc transition surface 1-3 is a circular arc surface with a radius R of 5 mm.
[0032] In a specific embodiment, the sharp corner in the bending machine connecting groove 1-2 is cleaned.
[0033] Preferably, the folding forming tool 1 is made of 42CrMo alloy quenched and tempered steel.
[0034] The bending process of the special folding forming tool on the over-connecting pipe is as follows: Figure 6 As shown, when bending, the high point side of the folding forming tool 1 is placed on the side with small curvature radius after forming, and the low point of the folding forming tool 1 is placed on the side with large curvature radius after forming, and the bending point connecting guide line corresponding to 1 / 2 is guided from 1-1', 2-2'…9-9' to perform folding forming. Among them, the 1 / 2 over-connecting pipe bending point and size are shown in the following table: Figure 5
[0035] 1 / 2 over-connecting pipe bending point and size (bending guide line)
[0036] bend point 1-1 2-2 3-3 4-4 5-5 6-6 7-7 8-8 9-9 dimension 338.83 339.54 341.69 345.43 350.9 326.71 309.44 300.84 300.28
[0037] The structure of the over-connecting pipe after bending forming is as shown in Figures 3-4
[0038] The utility model discloses a bending tool for transition connecting pipe, which comprises a bending tool body, a bending tool head and a bending tool handle.
[0039] It is to be understood by those skilled in the art that the present utility model is not limited to the details of the above exemplary embodiments but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present utility model. Thus, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present utility model being indicated by the appended claims rather than the above description, and it is intended to encompass all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.
[0040] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.
Claims
1. A special purpose crimping tool for use in the transition connection of pipes, characterized in that: The said folding forming cutter (1) comprises a cutter body (1-1), the lower part of the cutter body (1-1) is a circular arc transition surface (1-3), one side of the upper part of the cutter body (1-1) is a bending machine connecting groove (1-2), the height H1 of one side edge I (1-4) of the cutter body (1-1) is less than the height H2 of the other side edge II (1-5), the height difference between the side edge I (1-4) and the side edge II (1-5) forms an included angle a between the upper edge (1-6) and the bottom edge (1-7) of the cutter body (1-1).
2. The special crimping forming tool for a transition connection pipe according to claim 1, characterized by: The length L of the cutter body (1-1) is greater than the bending guide line (2-1) on the unfolded sheet during the processing of the excess connecting pipe (2).
3. The special crimping forming tool for a transition connection pipe according to claim 2, characterized by: The length L of the cutter body (1-1) is 400mm, and the thickness of the cutter body (1-1) is 13mm.
4. The special crimping former tool for a transition connection pipe according to claim 1, characterized by: The height H1 of the side edge I (1-4) of the cutter body (1-1) is 177.5mm, and the height H2 of the side edge II (1-5) of the cutter body (1-1) is 180mm; the height difference between the side edge I (1-4) and the side edge II (1-5) forms an included angle a of 0.36° between the upper edge (1-6) and the bottom edge (1-7).
5. The special crimping former tool for a transition connection pipe according to claim 1, characterized by: The circular arc transition surface (1-3) is a circular arc surface with a radius of R5mm.
6. The special crimping former tool for a transition connection pipe according to claim 1, characterized by: The sharp corner in the bending machine connecting groove (1-2) is cleaned.
7. The special crimping former tool for a transition connection pipe according to claim 1, characterized by: The folding forming cutter (1) is made of 42CrMo alloy quenched and tempered steel.