A tooling for expanding the pipe processing range of an electric pipe cutting and threading machine

Abstract

This utility model discloses a tooling for expanding the pipe processing range of an electric pipe cutting and threading machine. It is positioned between the front and rear chucks of the electric pipe cutting and threading machine and includes: an expansion joint comprising a coaxially arranged support part and a positioning part, with support holes and positioning holes respectively formed on opposite end faces of the support part and the positioning part, the support holes and the positioning holes being coaxially arranged; multiple through threaded holes formed on the outer periphery of both the support part and the positioning part, each threaded hole having a locking bolt threaded into it; a support pipe, one end of which is inserted into the support hole and fixed by the locking bolt, and the other end fixed by the front chuck; and a short pipe to be processed, one end of which is inserted into the positioning hole and fixed by the locking bolt, and the pipe body fixed by the rear chuck. This utility model effectively solves the problem of instability when clamping and threading certain short pipes in existing electric pipe cutting and threading machines, expands the pipe processing range, and improves the versatility and practicality of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of short pipe processing technology. More specifically, this utility model relates to a tooling for expanding the pipe processing range of an electric pipe cutting and threading machine. Background Technology

[0002] Electric pipe cutting and threading machines are commonly used mechanical devices, mainly used for cutting low-pressure pipes and processing external pipe threads. They typically consist of a motor, front chuck, rear chuck, cutting blades, die heads, and a sliding block for retraction. However, when dealing with pipes of different specifications, electric pipe cutting and threading machines often encounter situations where the pipe length being processed is less than the distance between the front and rear chucks. In such cases, the pipe is only held and locked by the three jaws of the rear chuck, causing the pipe to twist during thread processing due to insufficient clamping, thus affecting the accuracy of the pipe thread. Chinese utility model patent CN203900653U discloses a short pipe connecting chuck for a threading machine, but its complex structure leads to cumbersome manufacturing processes and relatively high quality requirements; furthermore, this structure is only designed for short pipes with threads on one end, limiting its application. Utility Model Content

[0003] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0004] To achieve these objectives and other advantages according to this utility model, a tooling for expanding the pipe processing range of an electric pipe cutting and threading machine is provided, disposed between the front and rear chucks of the electric pipe cutting and threading machine, comprising: An expansion joint includes a support part and a positioning part arranged coaxially. The support part and the positioning part have support holes and positioning holes respectively on their opposite end faces. The support holes and the positioning holes are arranged coaxially. The outer periphery of the support part and the positioning part are provided with multiple through threaded holes. Each threaded hole is threaded with a locking bolt. The support tube is inserted into the support hole at one end and fixed by the locking bolt at the other end, and fixed by the front chuck at the other end. The short tube to be processed is inserted into the positioning hole at one end and fixed by the locking bolt, and the tube body is fixed by the rear chuck.

[0005] Preferably, the support portion and the positioning portion are each provided with three threaded holes, and the three threaded holes are symmetrically arranged about the longitudinal axis of the expansion joint.

[0006] Preferably, the depth of the support hole and the positioning hole is not less than 100 mm.

[0007] Preferably, the support portion and the positioning portion are integrally formed, and the wall thickness of the support portion is 2 to 3 times the wall thickness of the positioning portion.

[0008] Preferably, an arc-shaped piece is fixedly provided at one end of the locking bolt located in the support hole or the positioning hole.

[0009] Preferably, the support part and the positioning part are detachably connected, and a hexagonal positioning post is provided at the center of the end of the support part connected to the positioning part, and a hexagonal positioning hole is provided at the center of the end face of the positioning part.

[0010] This utility model has at least the following beneficial effects: 1. The electric pipe cutting and threading machine provided by this utility model expands the pipe processing range tooling, effectively solving the problem of instability when clamping and threading some short pipes by the existing electric pipe cutting and threading machine, significantly expanding the pipe processing range of the equipment, enabling it to adapt to the processing needs of more pipes of different lengths and specifications, and improving the versatility and practicality of the equipment.

[0011] 2. The electric pipe cutting and threading machine provided by this utility model expands the pipe processing range. It has a simple structure, low manufacturing cost, and is easy to install and operate. It can save enterprises the cost of replacing equipment or outsourcing processes due to unsuitable equipment, and has good economic benefits.

[0012] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0013] Figure 1 A side view of the tooling for expanding the pipe processing range of the electric pipe cutting and threading machine described in this utility model; Figure 2 This is a vertical cross-sectional view of the expansion joint when the support part and the positioning part are integrally formed in this utility model. Figure 3 This is a side view of the hexagonal positioning post described in the utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0015] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figure 1 and Figure 2 As shown, this utility model provides a tooling for expanding the pipe processing range of an electric pipe cutting and threading machine, which is set between the front chuck 1 and the rear chuck 2 of the electric pipe cutting and threading machine, and includes: The expansion joint 6 includes a support part 61 and a positioning part 62 arranged coaxially. The support part 61 and the positioning part 62 have support holes 64 and positioning holes 63 respectively on their opposite end faces. The support holes 64 and positioning holes 63 are arranged coaxially. The outer periphery of the support part 61 and the positioning part 62 are provided with multiple through threaded holes, and each threaded hole is threaded with a locking bolt 8. The support tube 7 is inserted into the support hole 64 at one end and fixed by the locking bolt 8, and the other end is fixed by the front chuck 1. The short tube 5 to be processed is inserted into the positioning hole 62 at one end and then fixed by the locking bolt 8, and the tube body is fixed by the rear chuck 2.

[0017] In this technical solution, the electric pipe cutting and threading machine adopts a commercially available conventional threading machine, including a front chuck 1, a rear chuck 2, a cutting blade 3, and a die head 4. The front chuck 1 is used to clamp the front end of the pipe to be processed, ensuring that the pipe is fixed and concentric with the spindle; the rear chuck 2 is used to assist in fixing the tail end of the pipe, ensuring that the long pipe remains horizontal and straight during processing; the cutting blade 3 is used to cut the pipe to the required length; the die head 4 is used to process threads (threading) on ​​the end of the pipe. For short pipes whose length is less than the distance between the front chuck 1 and the rear chuck 2, the pipe processing range expansion tooling of the electric pipe cutting and threading machine allows the short pipe 5 to be processed and the support pipe 7 to be connected as a whole, ensuring that the front chuck 1 and the rear chuck can clamp simultaneously, ensuring stable rotation of the short pipe. Specifically, the support tube 7 and the short tube 5 to be processed are respectively inserted into the support holes 64 and the positioning holes 63 at both ends of the expansion joint 6, and then fixed by multiple locking bolts 8. This extends the length of the short tube 5 to be processed through the support tube 7, allowing the existing electric pipe cutting and threading machine to stably process the short tube, thus expanding the processing range of the equipment. The multiple locking bolts 8 ensure that the short tube 5 to be processed, the expansion joint 6, and the support tube 7 are coaxially arranged.

[0018] In another technical solution, the support part 61 and the positioning part 62 are each provided with three threaded holes, which are symmetrically arranged about the longitudinal axis of the expansion joint 6. The three threaded holes are spaced 120° apart from each other. The coaxiality of the support tube 7 and the short tube 5 to be processed can be adjusted by adjusting the length of the locking bolts 8 in the three threaded holes as they are screwed into the support hole 64 or the positioning hole 63.

[0019] In another technical solution, the depth of the support hole 64 and the positioning hole 63 is not less than 100mm, and sufficient insertion depth can ensure the stability of the support tube 7 and the short tube 5 to be processed.

[0020] In another technical solution, such as Figure 2 As shown, the support part 61 and the positioning part 62 are integrally formed structures, and the wall thickness of the support part 64 is 2 to 3 times the wall thickness of the positioning part 63. The expansion joint can be made of ordinary material (Q235) pipe or bar stock, or it can be made of high-strength metal material (45 steel). The support part 64 has a thicker wall, which can further improve the stability of the support pipe 7, while the positioning part 61, which has a thinner wall, can be easily distinguished from the support part 61, improving the installation and removal efficiency of the short pipe 5 to be processed.

[0021] In another technical solution, an arc-shaped piece is fixedly provided at one end of the locking bolt 8 located within the support hole 64 or the positioning hole 63. The arc-shaped piece increases the contact area between the locking bolt 8 and the support pipe 7 / short pipe 5 to be processed, preventing stress concentration and damage to the pipe. A rubber pad is fixedly provided on the side of the arc-shaped piece facing the support pipe 7 or the short pipe 5 to be processed, increasing the friction between the arc-shaped piece and the support pipe 7 or the short pipe 5 to be processed, while avoiding rigid contact between them.

[0022] In another technical solution, such as Figure 3 As shown, the support part 61 and the positioning part 62 are detachably connected. A hexagonal positioning post 65 is provided at the center of the end where the support part 61 connects to the positioning part 62, and a hexagonal positioning hole is correspondingly provided at the center of the end face of the positioning part 62. Considering that for short pipes with smaller diameters, the gap between the pipe and the positioning hole 63 is relatively large, and it is difficult to ensure a stable connection to the short pipe by relying solely on the bolt 6, the support part 61 and the positioning part 62 are detachably connected. Different sizes of the positioning part 62 can be selected according to the specifications of the short pipe 5 to be processed, further improving the pipe processing range of the electric pipe cutting and threading machine and expanding the applicability of the tooling. The detachable connection between the support part 61 and the positioning part 62 can be achieved using conventional bolt connections; specifically, a flange is provided at the end where the positioning part 62 connects to the support part 61, and multiple threaded holes are symmetrically opened on the flange and the end face of the support part. The threaded holes on the flange are through holes, and the threaded holes on the end face of the support part are blind holes, and then the connection is achieved using bolts. Furthermore, to ensure that the support part 61 and the positioning part 62 can be quickly coaxially connected, a hexagonal positioning post 65 and a hexagonal positioning hole are respectively provided on the end face where they are connected. Compared with cylindrical positioning, the hexagonal positioning post 65 can restrict the rotation between the two to improve stability.

[0023] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An electric pipe cutting and threading machine pipe processing range expansion tool, which is arranged between the front chuck and the rear chuck of the electric pipe cutting and threading machine, characterized in that, include: An expansion joint includes a support part and a positioning part arranged coaxially. The support part and the positioning part have support holes and positioning holes respectively on their opposite end faces. The support holes and the positioning holes are arranged coaxially. The outer periphery of the support part and the positioning part are provided with multiple through threaded holes. Each threaded hole is threaded with a locking bolt. The support tube is inserted into the support hole at one end and fixed by the locking bolt at the other end, and fixed by the front chuck at the other end. The short tube to be processed is inserted into the positioning hole at one end and fixed by the locking bolt, and the tube body is fixed by the rear chuck.

2. The motorized pipe threading machine pipe extending tooling of claim 1, wherein, The support part and the positioning part are each provided with three threaded holes, and the three threaded holes are symmetrically arranged about the longitudinal axis of the expansion joint.

3. The motorized pipe threading machine pipe extending tooling of claim 1, wherein, The depth of the support hole and the positioning hole is not less than 100mm.

4. The motorized pipe threading machine pipe extending tooling of claim 1, wherein, The support part and the positioning part are integrally formed, and the wall thickness of the support part is 2 to 3 times the wall thickness of the positioning part.

5. The motorized pipe threading machine pipe extending tooling of claim 1, wherein, An arc-shaped piece is fixedly installed at one end of the locking bolt located in the support hole or the positioning hole.

6. The motorized pipe threading machine pipe extending tooling of claim 1, wherein, The support part and the positioning part are detachably connected. A hexagonal positioning post is provided at the center of one end of the support part connected to the positioning part, and a hexagonal positioning hole is provided at the center of the end face of the positioning part.

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