Inner three-jaw positioning device for flanges at two ends of middle connecting pipe

Abstract

The utility model provides a three-jaw positioning device in flanges at two ends of a middle connecting pipe, which comprises a pipe body and flanges welded and fixed at two ends of the pipe body, three-jaw positioning devices are fixedly arranged at two ends of the pipe body, each three-jaw positioning device comprises a ring body and a plurality of clamping jaws movably fixed on the ring body, and the clamping jaws are tightly attached to the inner wall of the pipe body. The pipe body is fixed through the clamping jaws fixedly arranged on the basis of the main shaft and the auxiliary shaft in the machining process, the flange at the other end is machined without surface falling in the machining process, an ejector pin does not need to be used for positioning, the concentricity of the flanges at the two ends can be guaranteed, and the machining efficiency is improved. In the machining process, only the relative position between the pipe body with the flanges welded to the two ends and the turning tool needs to be adjusted; due to the fact that the main shaft and the tail shaft are fixed to the pipe body through the clamping jaws, the fixing mode is different from a conventional fixing mode, the process of machining a closing plate is not needed, the technological process is optimized, the production efficiency can be improved, and the machining cost can be effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structures, in particular to a three-claw positioning device in flanges at both ends of an intermediate pipe. Background Art

[0002] like Figure 1 As shown, in the original solution of connecting the intermediate tube to the flanges at both ends, the spindle uses three jaws to clamp the flange at one end of the intermediate tube, and uses a thimble to position the other end. During the processing, the blanking plate needs to be processed and the center hole needs to be punched, and then the flange at the other end needs to be cut and processed for secondary processing. The processing cost is high and the production efficiency is low. In addition, due to the need to cut and process the secondary processing, the concentricity of the secondary processing and the primary processing cannot be guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes a three-claw positioning device in the flanges at both ends of an intermediate pipe, which is formed in one process to ensure concentricity, improve production efficiency, optimize process steps, reduce welding and plate processing processes, and effectively control costs.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a three-claw positioning device in the flanges at both ends of the intermediate connecting pipe, including a pipe body and flanges welded and fixed to the two ends of the pipe body, and three-claw positioning devices are fixedly arranged at both ends of the pipe body. The three-claw positioning device includes a ring body and a plurality of claws movably fixed on the ring body, and the claws are tightly fitted to the inner wall of the pipe body.

[0005] Furthermore, the clamping claw comprises a fixing section, a connecting section and a claw section, wherein the fixing section and the claw section are respectively fixedly arranged at two ends of the connecting section, and a friction surface is arranged on the claw section, and the friction surface is tightly fitted with the inner wall of the tube body.

[0006] Furthermore, based on the fact that a groove body is radially opened on the ring body, the fixing section is welded and fixed in the groove body.

[0007] Furthermore, the fixing section is a stepped structure, and the stepped region of the fixing section is fixedly disposed facing the outer side of the ring body.

[0008] Furthermore, the ring body includes a first ring body and a second ring body, the diameters of the first ring body and the second ring body are not greater than the diameter of the tube body, and the diameter of the second ring body is smaller than the diameter of the first ring body.

[0009] Compared with the prior art, the beneficial effects of the utility model include:

[0010] 1) The pipe body is fixed by the clamping claws fixed on the main axis and the secondary axis during the processing. The flange at the other end can be processed without cutting the surface during the processing. There is no need to use a thimble for positioning. The concentricity of the flanges at both ends can be guaranteed. During the processing, only the relative position between the pipe body with flanges welded at both ends and the turning tool needs to be adjusted;

[0011] 2) And because the main shaft and tail shaft are fixed to the tube body by using claws to fix them from the inside of the tube body, it is different from Figure 1 The fixing method shown does not require the process of machining the blanking plate, optimizes the process, can improve production efficiency, and effectively control processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0013] Figure 1 The schematic diagram shows the method of using ejector pins to complete the processing and fixing of the pipe body and flange in the original scheme;

[0014] Figure 2 The schematic diagram shows the processing and fixing method of the pipe body and the flange using the inner three-claw positioning device in the technical solution;

[0015] Figure 3 The schematic diagram shows the partially enlarged structure of the inner three-claw positioning device.

[0016] Numbers in the figure: 1-tube body, 2-flange, 3-ring body, 4-claw, 5-fixed section, 6-connecting section, 7-claw section, 8-friction surface, 9-groove body, 10-first ring body, 11-second ring body. DETAILED DESCRIPTION

[0017] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0018] like Figure 2 As shown, a three-claw positioning device in the flanges at both ends of an intermediate pipe comprises a pipe body 1 and flanges 2 welded and fixed to both ends of the pipe body 1, and three-claw positioning devices are fixedly arranged at both ends of the pipe body 1, wherein the three-claw positioning device comprises a ring body 3 and a plurality of claws 4 movably fixed on the ring body 3, and the claws 4 are tightly fitted to the inner wall of the pipe body 1.

[0019] like Figure 3 As shown, the aforementioned claw 4 includes a fixed section 5, a connecting section 6 and a claw section 7. The fixed section 5 and the claw section 7 are respectively fixedly arranged at both ends of the connecting section 6. A friction surface 8 is arranged on the claw section 7, and the friction surface 8 is tightly fitted with the inner wall of the tube body 1. It is worth noting that the aforementioned fixed section 5 is a stepped structure, and the stepped area of ​​the fixed section 5 is fixedly arranged facing the outside of the ring body 3; a groove body 9 is opened radially along the aforementioned ring body 3, and the fixed section 5 is fixed in the groove body 9 by welding.

[0020] The aforementioned ring body 3 includes a first ring body 10 and a second ring body 11, the diameters of the first ring body 10 and the second ring body 11 are not greater than the diameter of the tube body 1, and the second ring body 11 is smaller than the diameter of the first ring body 10. In the actual application process, the clamping claw 4 is welded on the main shaft (first ring body 10) and the tail secondary shaft (second ring body 11). When the two ends of the tube body 1 are welded to the flange 2, one end is fixed by the main shaft clamping claw 4 on the lathe, and the other end is fixed by the secondary shaft clamping claw 4 at the tail of the lathe. The flanges 2 at both ends are processed by the turning tool. During the processing, the clamping claw 4 fixedly set based on the main shaft and the secondary shaft is used to fix the tube body 1. During the processing, the processing of the flange 2 at the other end does not need to be completed by cutting the surface, and the positioning of the ejector pin is not required during the processing. The main shaft and the tail shaft are directly used to position the tube body 1, which can ensure the concentricity of the flanges 2 at both ends. During the processing, only the relative position between the tube body 1 with flanges 2 welded at both ends and the turning tool needs to be adjusted. And because the fixing method between the main shaft and the tail shaft and the tube body 1 is to use the claws 4 to complete the fixing from the inside of the tube body 1, it is different from Figure 1 The fixing method shown does not require the process of machining the blanking plate, optimizes the process, can improve production efficiency, and effectively control processing costs.

[0021] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A three-claw positioning device in the flanges at both ends of an intermediate pipe, comprising a pipe body (1) and flanges (2) welded and fixed to both ends of the pipe body (1), characterized in that: Three-claw positioning devices are fixedly arranged at both ends of the tube body (1), and the three-claw positioning devices include a ring body (3) and a plurality of clamping claws (4) movably fixed on the ring body (3), and the clamping claws (4) are tightly fitted with the inner wall of the tube body (1).

2. The three-claw positioning device in the flanges at both ends of the intermediate pipe according to claim 1 is characterized in that: The clamping claw (4) comprises a fixing section (5), a connecting section (6) and a claw section (7); the fixing section (5) and the claw section (7) are respectively fixedly arranged at two ends of the connecting section (6); a friction surface (8) is arranged on the claw section (7); and the friction surface (8) is tightly fitted with the inner wall of the tube body (1).

3. The three-claw positioning device in the flanges at both ends of the intermediate pipe according to claim 2 is characterized in that: Based on the fact that the ring body (3) is radially provided with a groove body (9), the fixing section (5) is welded and fixed in the groove body (9).

4. The three-claw positioning device in the flanges at both ends of the intermediate pipe according to claim 3 is characterized in that: The fixing section (5) is a stepped structure, and the stepped area of ​​the fixing section (5) is fixedly arranged facing the outer side of the ring body (3).

5. The three-claw positioning device in the flanges at both ends of the intermediate pipe according to claim 1 is characterized in that: The ring body (3) comprises a first ring body (10) and a second ring body (11); the diameters of the first ring body (10) and the second ring body (11) are not greater than the diameter of the tube body (1), and the diameter of the second ring body (11) is smaller than the diameter of the first ring body (10).

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