An auxiliary tool suitable for pipe beveling

Abstract

The utility model relates to an auxiliary tool suitable for pipe fitting groove machining, include: sleeve, a plurality of adjusting bolt are set up in sleeve, the inner end of each adjusting bolt stretches into the sleeve and is in abutment with the outer wall of pipe fitting, the position of pipe fitting in sleeve is adjusted through screwing each adjusting bolt, chuck is used for stretching into pipe fitting end and abutting the inner wall of pipe fitting, include: chuck main part, its inside is provided with transmission mechanism, a plurality of clamping jaw evenly distribute and set up in one side of chuck main part stretches into pipe fitting end, center fixed axle rod is set up in the other side of chuck main part not stretches into pipe fitting end, is linked with each clamping jaw through transmission mechanism, when center fixed axle rod is driven to rotate, all clamping jaws are driven to move along the radial direction of chuck main body through transmission mechanism and are synchronous, realize the abutting of pipe fitting inner wall or loosening. The utility model can give consideration to high quality, high accuracy and high efficiency, low cost of groove machining, and the advantage is remarkable.

Description

Technical Field

[0001] This utility model relates to the field of welding beveling technology, specifically to an auxiliary tooling suitable for beveling pipe fittings. Background Technology

[0002] The emergency pump pipe and main pump pipe in the pump tower structure are mainly made of stainless steel pipes. The joints need to be beveled to facilitate welding and forming. They are welded into a steel pipe with a total length of about 30m, which becomes an important pipe component that serves as both a structural and functional component.

[0003] However, there are two major technical challenges in the welding beveling of long stainless steel pipes used in pump towers: First, when machining on a lathe, the roundness and dimensional errors of the pipe itself can easily cause the original flared chuck to lose its center positioning, and the root cannot be machined, requiring manual grinding, which seriously affects the quality and precision of the beveling. Second, although beveling machines can ensure quality and precision, the processing time for a single piece is as long as 1-2 hours and requires continuous addition of coolant, resulting in low production efficiency and high costs. Therefore, it is clear that existing technologies cannot simultaneously achieve high quality, high precision, high efficiency, and low cost in beveling.

[0004] Therefore, it is essential to propose an auxiliary tooling suitable for steel pipe beveling that can overcome the above problems.

[0005] It is understood that the above statements only provide background information related to this utility model and do not necessarily constitute prior art. Utility Model Content

[0006] Based on the aforementioned technical problems, the purpose of this utility model is to provide an auxiliary tooling suitable for steel pipe beveling, which can balance high quality, high precision, high efficiency, and low cost in beveling.

[0007] To achieve the above objectives, the first aspect of this utility model provides an auxiliary tooling suitable for beveling pipe fittings, comprising: a sleeve fitted onto the outer wall of the pipe fitting, with a gap between the sleeve and the pipe fitting; a plurality of adjusting bolts disposed on the sleeve, each adjusting bolt having its inner end extending into the sleeve and abutting against the outer wall of the pipe fitting, wherein the position of the pipe fitting within the sleeve is adjusted by tightening the adjusting bolts, so that the center line of the pipe fitting coincides with the center line of the sleeve; wherein the adjusting bolts are spaced apart along the axial direction of the sleeve circumferentially and penetrate the sleeve wall radially; and a chuck. The chuck is positioned at both ends of the pipe fitting and extends into the end of the pipe fitting to abut against the inner wall of the pipe fitting for centered positioning. The chuck includes: a chuck body with a transmission mechanism inside; multiple jaws evenly distributed on one side of the chuck body where the end of the pipe fitting is inserted; and a central fixing shaft on the other side of the chuck body where the end of the pipe fitting is not inserted, connected to each of the jaws through the transmission mechanism. When the central fixing shaft is driven to rotate, the transmission mechanism drives all the jaws to move synchronously along the radial direction of the chuck body, thereby abutting or releasing the inner wall of the pipe fitting.

[0008] Preferably, the chuck body is a multi-level annular structure, with the diameter of each annular structure decreasing sequentially; wherein, a jaw is provided on the side of the annular structure with the largest diameter, and a central fixed shaft is provided on the side of the annular structure with the smallest diameter.

[0009] Preferably, in the non-working state, the outermost end of each jaw's gripping working surface extends out of the chuck edge, the jaw is a protruding structure relative to the chuck, and the protruding structure is in close contact with the outer wall of the largest diameter annular structure of the chuck body; Preferably, in the clamping state, the chuck extends radially outward along the chuck body to press against the inner wall of the pipe, and the outer wall of the outermost end forms an annular surface contact with the inner wall of the pipe to provide a clamping force.

[0010] Preferably, in the clamping state, a tool gap is formed between the chuck body and the inner wall of the pipe.

[0011] Preferably, the radial dimension of the tool gap is greater than the operating space that allows the cutting tool to extend and machine the root of the bevel at the end of the pipe fitting.

[0012] Preferably, the auxiliary tooling further includes a central frame for placing the sleeve, and the central frame is provided with rollers that contact the outer wall of the sleeve; the rollers can rotate around their own axis, thereby driving the sleeve to rotate around its center line.

[0013] Preferably, the inner end of the adjusting bolt is covered with a thin stainless steel plate.

[0014] Preferably, the adjusting bolts are evenly distributed along the circumference of the sleeve, and the total number of adjusting bolts is less than or equal to 16.

[0015] Preferably, the adjusting bolts are divided into two groups along the axial direction of the sleeve, and the two groups of adjusting bolts are respectively disposed at both ends of the sleeve.

[0016] In summary, compared with the prior art, the auxiliary tooling for beveling pipe fittings provided by this utility model has at least the following advantages: (1) The auxiliary tooling provided by this utility model can quickly and accurately realize the centering adjustment of the pipe fitting center line through the cooperation of the sleeve and the adjusting bolt, which effectively solves the problem of center positioning inaccuracy caused by the roundness and size error of the pipe itself during lathe processing; (2) The auxiliary tooling provided by this utility model achieves the tight clamping of the inner wall of the pipe through the jaws on the chuck, and also forms a tool gap, so that the cutting tool can reach the root of the bevel at the end of the pipe for processing, avoiding manual secondary grinding, and greatly improving the quality and accuracy of bevel processing. (3) The auxiliary tooling provided by this utility model has a simple structure and is easy to operate. When used with the center frame, it can realize the stable rotation processing of pipe fittings. Compared with the traditional beveling machine processing method, it significantly shortens the processing time of a single piece and reduces the amount of coolant used, thereby improving production efficiency and reducing production costs. It well takes into account the high quality, high precision and high efficiency and low cost requirements of beveling processing. It has broad application prospects and promotion value in the field of welding beveling processing technology. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the auxiliary tooling in this utility model; Figure 2 This is a three-dimensional structural diagram of the sleeve structure in this utility model; Figure 3 This is a cross-sectional view of the sleeve structure in this utility model; Figure 4 This is a three-dimensional structural diagram of the chuck structure in this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings, through a preferred embodiment.

[0019] It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions. They are only used to facilitate and clarify the illustration of the embodiments of this utility model, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationship, or adjustments to the size should still fall within the scope of the technical content disclosed in this utility model, provided that they do not affect the effects and objectives that this utility model can produce.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0021] like Figure 1 As shown, this utility model provides an auxiliary tooling suitable for beveling pipe fittings, including: a sleeve 1, which is fitted onto the outer wall of the pipe fitting 3, with a gap between the sleeve 1 and the pipe fitting 3; a plurality of adjusting bolts 11, which are disposed on the sleeve 1, with the inner end of each adjusting bolt 11 extending into the sleeve 1 and abutting against the outer wall of the pipe fitting 3, and adjusting the position of the pipe fitting 3 within the sleeve 1 by turning each adjusting bolt 11, so that the center line of the pipe fitting 3 coincides with the center line of the sleeve 1; and a chuck 2, which is disposed at both ends of the pipe fitting 3, for extending into the end of the pipe fitting 3 and abutting against the inner wall of the pipe fitting 3 to achieve center positioning.

[0022] Among them, such as Figure 2 and Figure 3 As shown, the adjusting bolts 11 are spaced apart along the axial direction of the sleeve 1 around the circumference of the sleeve 1, and penetrate the sleeve wall radially along the sleeve 1. It can be understood that by tightening each adjusting bolt 11, the length of the adjusting bolt 11 extending into the sleeve 1 can be changed, thereby changing the degree of contact between its inner end and the outer wall of the pipe fitting 3. This allows adjustment of the gap between the sleeve 1 and the pipe fitting 3. Combined with a dial indicator, the centerline of the pipe fitting 3 can be made to coincide with the centerline of the sleeve 1, thus achieving precise alignment. It should be noted that alignment using a dial indicator is a conventional mechanical alignment method, and will not be elaborated upon here.

[0023] Furthermore, such as Figure 4 As shown, the chuck 2 includes: The chuck body 20 has a multi-ring structure, with the diameter of each ring decreasing sequentially, and a transmission mechanism is provided inside it; the largest ring of the chuck body 20 extends into the end of the pipe fitting 3; Multiple jaws 21 are evenly distributed on one side of the chuck body 20 that extends into the end of the pipe fitting 3 (i.e., the side of the ring with the largest diameter of the chuck body 20). The central fixed shaft 22 is located on the other side of the chuck body 20 that does not extend into the end of the pipe fitting 3, that is, it is connected to the side of the smallest diameter ring of the chuck body 20.

[0024] Furthermore, the central fixed shaft 22 is indirectly connected to each jaw 21 via a transmission mechanism (not shown in the figure) inside the chuck body 2. When the central fixed shaft 22 is driven to rotate, the transmission mechanism can drive all jaws 21 to move radially synchronously, that is, each jaw 21 can extend and retract along the radial direction of the chuck body 20, thereby tightening or loosening the inner wall of the pipe fitting 3. It is understood that this transmission mechanism is a conventional design in this field and will not be described in detail here.

[0025] More specifically, in the non-working state, the outermost end 211 of each jaw 21 of the clamping working surface extends out of the edge of the chuck 2, and its inner wall is in close contact with the outer wall of the largest ring of the chuck body 20. At this time, the maximum outer diameter of the entire chuck 2 is smaller than the inner wall of the pipe 3, that is, the jaw 21 is a protruding structure relative to the chuck 2, and the protruding structure is in close contact with the outer wall of the largest diameter ring of the chuck body 20.

[0026] In the clamping state, each jaw 21 extends outward radially along the chuck body 20 under the action of the central fixed shaft 22 and the transmission mechanism. When it abuts against the inner wall of the pipe 3, the outermost end 211 forms an annular surface contact with the inner wall of the pipe 3, thereby providing a stable and reliable clamping force. At this time, the chuck 2 is fixedly inserted into the end of the pipe 3, and an annular tool gap is formed between the chuck body 20 and the inner wall of the pipe 3. This gap allows the lathe tool to extend in and directly machine the root of the bevel at the end of the pipe 3, avoiding secondary manual grinding and improving processing efficiency and accuracy.

[0027] It is worth noting that the radial dimension of the tool clearance is greater than the minimum operating space required for the cutting tool to extend into and machine the root of the bevel at the end of the pipe 3. In practical applications, the size of the annular tool clearance formed between the chuck body 20 and the inner wall of the pipe 3 can be adjusted by adjusting the depth to which the chuck 2 extends axially into the pipe 3. Specifically, as... Figure 1 As shown, in this embodiment, in the multi-level annular structure of the chuck body 20, only the largest ring portion is inserted into the pipe 3. When the jaws 21 extend radially and abut against the inner wall of the pipe 3, the tool clearance is the distance between the inner wall of the outermost end 211 of the working surface of each jaw 21 and the largest ring of the chuck body 20. In other embodiments, the second-level annular structure of the chuck body 20 can also be inserted into the pipe 3. In this case, the tool clearance is the distance between the inner wall of the outermost end 211 of the working surface of each jaw 21 and the second-level annular structure of the chuck body 20. Since the diameter of the second-level annular structure is smaller than the diameter of the largest ring, the tool clearance can be further increased, providing more space for machining operations.

[0028] Furthermore, such as Figure 2As shown, the sleeve 1 has a cylindrical structure, and the inner wall of the sleeve 1 is adapted to the outer wall of the pipe fitting 3 to provide radial support for the pipe fitting 3.

[0029] Furthermore, the auxiliary tooling also includes a center frame (not shown in the figure) for placing the sleeve 1; the center frame is equipped with rollers that contact the outer wall of the sleeve 1; and the rollers can rotate around their own axis, thereby driving the sleeve 1 to rotate around its center line, providing stable support for the rotational processing of the pipe fitting 3. The contact surfaces between the rollers and the sleeve 1 are coated with lubricating oil to reduce friction between them and ensure that the sleeve 1 can rotate smoothly and stably.

[0030] Furthermore, the inner end of the adjusting bolt 11 is covered with a thin stainless steel plate to avoid direct contact between the adjusting bolt 11 and the outer wall of the pipe fitting 3, thus preventing wear.

[0031] Furthermore, such as Figure 2 and Figure 3 As shown, the adjusting bolts 11 are evenly distributed along the circumference of the sleeve 1, and the total number of adjusting bolts 11 is recommended to be no more than 16.

[0032] In a preferred embodiment of this utility model, the adjusting bolts 11 are divided into two groups along the axial direction of the sleeve 1, and the two groups of adjusting bolts 11 are respectively disposed at both ends of the sleeve 1, and each group of adjusting bolts 11 has 4 bolts evenly distributed along the circumference of the sleeve 1, and the total number of adjusting bolts 11 is 8; at the same time, the number of the claws 21 is preferably 6, so as to ensure that the inner wall of the pipe 3 is in contact at all angles simultaneously.

[0033] Furthermore, the method for beveling pipe fittings using the aforementioned auxiliary tooling specifically includes the following steps: S1. Fit sleeve 1 onto the outer wall of pipe fitting 3; S2. Adjust the adjusting bolt 11 and use the dial indicator to calibrate the reading on the outer wall of the pipe fitting 3 so that the center line of the pipe fitting 3 coincides with the center line of the sleeve 1. S3. Insert one end of the jaw 21 of the chuck 2 into the inner wall of the pipe fitting 3, drive the rotating center fixed shaft 22, so that the outermost end 211 of the clamping working surface of each jaw 21 extends outward in the radial direction at the same time, so as to completely abut against the inner wall of the pipe fitting 3. S4. Place the assembled tooling on the center frame, and insert the cutting tool into the annular tool gap formed between the chuck body 20 and the inner wall of the pipe fitting 3. Drive the rollers set on the center frame to rotate, thereby driving the sleeve 1 to rotate and perform beveling of the pipe fitting 3.

[0034] Furthermore, in step S3, the size of the tool clearance formed between the chuck body 20 and the inner wall of the pipe 3 can be adjusted by adjusting the depth of the chuck 2 extending axially into the pipe 3, so as to match the size of the turning tool to be used for machining.

[0035] In summary, this utility model provides an auxiliary tooling suitable for pipe beveling. Through the cooperation of the sleeve and adjusting bolt, it can quickly and accurately achieve the centering adjustment of the pipe's centerline, effectively solving the problem of center positioning inaccuracy caused by the roundness and dimensional errors of the pipe itself during lathe machining. The jaws on the chuck achieve a tight clamping of the inner wall of the pipe and also create a tool clearance, allowing the cutting tool to reach the root of the beveling at the end of the pipe for machining, avoiding manual secondary grinding and greatly improving the quality and accuracy of beveling. At the same time, this auxiliary tooling has a simple structure and is easy to operate. When used with a center rest, it can achieve stable rotational machining of the pipe. Compared with traditional beveling machine machining methods, it significantly shortens the single-piece machining time and reduces the amount of coolant used, thereby improving production efficiency and reducing production costs. It well balances the requirements of high quality, high precision, high efficiency, and low cost in beveling, and has broad application prospects and promotion value in the field of welding beveling technology.

[0036] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. An auxiliary tooling suitable for beveling pipe fittings, characterized in that, include: A sleeve is fitted onto the outer wall of a pipe fitting, with a gap between the sleeve and the pipe fitting. Multiple adjusting bolts are provided on the sleeve. The inner end of each adjusting bolt extends into the sleeve and abuts against the outer wall of the pipe fitting. By turning each adjusting bolt, the position of the pipe fitting in the sleeve is adjusted so that the center line of the pipe fitting coincides with the center line of the sleeve. The adjusting bolts are spaced apart along the axial direction of the sleeve and penetrate the sleeve wall radially. A chuck is provided at both ends of the pipe fitting and is used to extend into the end of the pipe fitting and abut against the inner wall of the pipe fitting to achieve center positioning; The chuck includes: The chuck body has a transmission mechanism installed inside; Multiple jaws are evenly distributed on one side of the chuck body that extends into the pipe fitting. A central fixed shaft is located on the other side of the chuck body that does not extend into the end of the pipe fitting, and is connected to each of the jaws through the transmission mechanism; When the central fixed shaft is driven to rotate, it drives all the jaws to move synchronously along the radial direction of the chuck body through the transmission mechanism, thereby achieving the clamping or loosening of the inner wall of the pipe fitting.

2. The auxiliary tooling as described in claim 1, characterized in that, The chuck body is a multi-level ring structure, with the diameter of each ring structure decreasing sequentially; the ring structure with the largest diameter is provided with a jaw on one side, and the ring structure with the smallest diameter is provided with a central fixed shaft on the other side.

3. The auxiliary tooling as described in claim 2, characterized in that, In the non-working state, the outermost end of each jaw's gripping working surface extends out of the chuck edge. The jaw is a protruding structure relative to the chuck, and this protruding structure is in close contact with the outer wall of the largest diameter annular structure of the chuck body.

4. The auxiliary tooling as described in claim 3, characterized in that, In the clamping state, the jaws extend radially outward along the chuck body to press against the inner wall of the pipe, and the outer wall of the outermost end forms an annular surface contact with the inner wall of the pipe to provide a clamping force.

5. The auxiliary tooling as described in claim 4, characterized in that, In the clamping state, a tool gap is formed between the chuck body and the inner wall of the pipe.

6. The auxiliary tooling as described in claim 5, characterized in that, The radial dimension of the tool gap is greater than the operating space that allows the lathe tool to extend and machine the root of the bevel at the end of the pipe fitting.

7. The auxiliary tooling as described in claim 1, characterized in that, The auxiliary tooling also includes a central frame for placing the sleeve, and the central frame is provided with rollers that contact the outer wall of the sleeve; The roller can rotate around its own axis, thereby driving the sleeve to rotate around its center line.

8. The auxiliary tooling as described in claim 1, characterized in that, The inner end of the adjusting bolt is covered with a thin stainless steel plate.

9. The auxiliary tooling as described in claim 1, characterized in that, The adjusting bolts are evenly distributed along the circumference of the sleeve, and the total number of the adjusting bolts is less than or equal to 16.

10. The auxiliary tooling as described in claim 9, characterized in that, The adjusting bolts are divided into two groups along the axial direction of the sleeve, and the two groups of adjusting bolts are respectively disposed at both ends of the sleeve.

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