Moving device of expansion device of pipe threading machine

Abstract

A moving device of an expansion device of a pipe threading machine comprises a support and a sliding base, a telescopic air cylinder is installed above the support, and the end of a piston rod of the telescopic air cylinder is coaxially connected with a lead screw. An upper slide rail and a lower slide rail which are parallel to each other are respectively arranged on the upper surface and the lower surface of the bracket; the sliding seat comprises an upper sliding seat and a lower sliding seat, the front side and the rear side of the upper sliding seat are connected with the front side and the rear side of the lower sliding seat through connecting plates, an upper sliding block is fixedly installed on the lower surface of the upper sliding seat and slidably connected to the outer surface of the upper sliding rail, and a lead screw penetrates through the upper sliding seat and is fixedly connected with the upper sliding seat; a lower sliding block is fixedly installed on the upper surface of the lower sliding seat and slidably connected to the outer surface of the lower sliding rail, and a pipe expanding device is fixedly installed below the lower sliding seat. According to the utility model, the defects in the prior art are overcome, the expansion device can be kept immovable when a common thread is turned so as to realize efficient production, and meanwhile, the expansion device can be moved away when a special thread is turned so as to avoid hindering the entry of a turning tool.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a pipe threading machine, especially a moving device for the expansion and tightening device of a pipe threading machine. Background Technology

[0002] When threading external threads on a pipe threading machine, the tube expander is typically fixed in a fixed position at the front of the front chuck via a bracket mounted on the machine base. Since the expander remains stationary during threading, it needs to support the inner wall of the pipe, thus occupying space in the middle of the pipe. When threading ordinary threads, the expander only tightens and loosens, while the inner hole is only chamfered at the end, allowing the cutting tool to continue cutting. However, when threading special threads, especially those requiring deeper penetration or with smaller pipe diameters, the expander can obstruct the cutting tool's entry, affecting both efficiency and quality. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a moving device for the expansion device of the pipe thread turning machine, which overcomes the shortcomings of the prior art. It can keep the expansion device stationary when turning ordinary threads to achieve efficient production, and can also remove the expansion device when turning special threads to avoid obstructing the entry of the turning tool.

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

[0005] A movable device for a tightening device of a pipe threading machine includes a bracket and a slide block. The bracket is fixedly installed on the pipe threading machine. A telescopic cylinder is fixedly installed above the bracket. A lead screw is coaxially fixedly connected to the piston rod end of the telescopic cylinder. An upper slide rail and a lower slide rail, which are parallel to each other, are fixedly installed on the upper and lower surfaces of the bracket, respectively. The upper slide rail is arranged parallel to the lead screw.

[0006] The slide includes an upper slide and a lower slide. The front and rear sides of the upper slide and the front and rear sides of the lower slide are connected to each other by connecting plates. An upper slider is fixedly installed on the lower surface of the upper slide and is slidably connected to the outer surface of the upper slide rail. The lead screw passes through the upper slide and is fixedly connected to the upper slide. A lower slider is fixedly installed on the upper surface of the lower slide and is slidably connected to the outer surface of the lower slide rail. An expansion tube device is fixedly installed below the lower slide.

[0007] Preferably, the upper slide has a through hole on its surface, the lead screw passes through the through hole, and the outer surface of the lead screw is connected to a first nut and a second nut by threads. The first nut and the second nut are located on both sides of the through hole, and the first nut and the second nut abut against the two sides of the upper slide.

[0008] Preferably, right-angle plates are fixedly installed on both ends of the telescopic cylinder, and multiple parallel mounting blocks are fixedly installed on the upper surface of the bracket. A strip-shaped locking groove is provided on the mounting block, and the axis of the strip-shaped locking groove is parallel to the axis of the lead screw. Locking bolts are installed on both sides of the right-angle plate, and the stud end of the locking bolt passes through the right-angle plate and is locked and fixed to the strip-shaped locking groove by threads.

[0009] This utility model provides a moving device for the expansion device of a pipe threading machine. It has the following advantages: the piston rod of the telescopic cylinder drives the lead screw to move, which in turn moves the entire slide block. This allows for convenient movement of the expansion device according to machining requirements, preventing the expansion device from obstructing the entry of the cutting tool when machining special threads, thus improving machining efficiency and effect. Furthermore, the combined action of the upper sliding pair formed by the upper slide block and the upper slide rail, and the lower sliding pair formed by the lower slide block and the outer surface of the lower slide rail, effectively ensures the rigidity and precision stability of the expansion device during operation, guaranteeing machining quality. Additionally, by setting a first nut and a second nut on the lead screw, the position of the expansion device can be precisely adjusted by adjusting the positions of the first nut and the second nut, making it suitable for processing pipes of different specifications. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0011] Figure 1 A schematic diagram of the structure of this utility model in use;

[0012] Figure 2 A schematic diagram of the structure of this utility model;

[0013] Figure 3 A schematic diagram of the installation structure of the telescopic cylinder and the lead screw in this utility model;

[0014] Explanation of the labels in the diagram:

[0015] 1. Bracket; 2. Slide; 3. Telescopic cylinder; 4. Lead screw; 5. Upper slide rail; 6. Lower slide rail; 7. Expansion tube device; 8. First nut; 9. Second nut; 10. Right angle plate; 11. Mounting block; 12. Strip locking groove; 13. Locking bolt; 21. Upper slide; 22. Lower slide; 23. Connecting plate; 24. Upper slider; 25. Lower slider. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0017] Example 1, as Figures 1 to 3 As shown, a moving device for a pipe threading machine's expansion and tightening device includes a bracket 1 and a slide block 2. The bracket 1 is fixedly installed on the pipe threading machine. A telescopic cylinder 3 is fixedly installed above the bracket 1. A lead screw 4 is coaxially fixedly connected to the piston rod end of the telescopic cylinder 3. An upper slide rail 5 and a lower slide rail 6, which are parallel to each other, are fixedly installed on the upper and lower surfaces of the bracket 1, respectively. The upper slide rail 5 is arranged parallel to the lead screw 4.

[0018] The slide block 2 includes an upper slide block 21 and a lower slide block 22. The front and rear sides of the upper slide block 21 and the front and rear sides of the lower slide block 22 are connected to each other by connecting plates 23. An upper slider 24 is fixedly installed on the lower surface of the upper slide block 21. The upper slider 24 is slidably connected to the outer surface of the upper slide rail 5 to form an upper sliding pair. The lead screw 4 passes through the upper slide block 21 and is fixedly connected to the upper slide block 21. A lower slider 25 is fixedly installed on the upper surface of the lower slide block 22. The lower slider 25 is slidably connected to the outer surface of the lower slide rail 6 to form a lower sliding pair. An expansion tube device 7 is fixedly installed below the lower slide block 22.

[0019] Working principle:

[0020] In practical operation, when the inner bore of the pipe needs to be machined, the piston rod of the telescopic cylinder 3 is extended, which drives the entire slide 2 along the axial direction of the upper slide rail 5 and the lower slide rail 6 via the lead screw 4. This moves the tube expansion device 7 below the slide 22 away from the chuck on the front side of the pipe threading machine, thus avoiding obstruction of the cutting tool and ensuring that the cutting tool can enter the inner bore of the pipe to machine the inner wall of the pipe. When the outer diameter of the pipe needs to be machined, the piston rod of the telescopic cylinder 3 is retracted, which then drives the entire slide 2 to move in the opposite direction to the initial position via the lead screw 4. This moves the tube expansion device 7 closer to the chuck on the front side of the pipe threading machine. The tube expander of the tube expansion device 7 can then extend into the inner wall of the pipe to support and fix the pipe, effectively ensuring the stability during the machining of the outer diameter of the pipe.

[0021] In this embodiment, the upper sliding pair formed by the upper slider 24 cooperating with the upper slide rail 5 and the lower slider 25 forming a lower sliding pair with the outer surface of the lower slide rail 6 are used to effectively ensure the stability of the telescopic cylinder 3 when it drives the entire slide block 2 to move through the combined action of the upper and lower sliding pairs. Furthermore, the joint limiting action of the upper and lower sliding pairs effectively ensures the rigidity and accuracy stability of the tube expansion device during operation, thereby ensuring the turning quality.

[0022] Example 2, as Figure 3As shown, as a further preferred embodiment, the upper slide 21 has a through hole on its surface, the lead screw 4 passes through the through hole, and the outer surface of the lead screw 4 is respectively connected to a first nut 8 and a second nut 9 by threads. The first nut 8 and the second nut 9 are located on both sides of the through hole, and the first nut 8 and the second nut 9 abut against the two sides of the upper slide 21 respectively.

[0023] Therefore, when processing pipes of different lengths and specifications, the first nut 8 and the second nut 9 can be rotated to allow the entire slide 2 to move and adjust along the axial direction of the lead screw 4, thereby achieving precise adjustment of the position of the tube expansion device 7. This ensures that when the piston rod of the telescopic cylinder 3 retracts, the tube expander of the tube expansion device 7 can extend into the inner wall of the pipe to support and fix the pipe. This allows the present invention to adapt to the processing needs of pipes of different specifications. After the slide 2 is adjusted to the appropriate position, the first nut 8 and the second nut 9 can be tightened, causing them to abut against the two sides of the upper slide 21, thereby achieving a locking and fixing effect between the upper slide 21 and the lead screw 4.

[0024] Example 3, as Figure 3 As shown, as a further preferred embodiment, right-angle plates 10 are fixedly installed on both ends of the telescopic cylinder 3, and multiple parallel mounting blocks 11 are fixedly installed on the upper surface of the bracket 1. The mounting blocks 11 are provided with strip-shaped locking grooves 12, the axis of the strip-shaped locking grooves 12 is parallel to the axis of the lead screw 4, and locking bolts 13 are installed on both sides of the right-angle plates 10. The stud end of the locking bolts 13 passes through the right-angle plates 10 and is locked and fixed to the strip-shaped locking grooves 12 by threads.

[0025] By providing a strip-shaped locking groove 12 on the mounting block 11, and connecting and fixing the right-angle plates 10 on both ends of the telescopic cylinder 3 to the strip-shaped locking groove 12 via locking bolts 13, the position of the telescopic cylinder 3 can be finely adjusted by adjusting the fixing position of the locking bolts 13 on the strip-shaped locking groove 12 according to the processing requirements of pipes of different specifications and lengths.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A travelling device for a pipe thread tapping machine expansion device, characterized in that: Including support (1) and sliding seat (2), support (1) is fixedly installed on pipe thread tapping machine, the telescopic cylinder (3) is fixedly installed above the support (1), the piston rod end of the telescopic cylinder (3) is coaxially fixedly connected with the lead screw (4);The upper surface and the lower surface of the support (1) are fixedly installed with the parallel upper slide rail (5) and the lower slide rail (6) respectively, the upper slide rail (5) is arranged in parallel with the lead screw (4); The sliding seat (2) includes upper slide (21) and lower slide (22), the front and rear sides of the upper slide (21) and the front and rear sides of the lower slide (22) are connected with each other through the connecting plate (23) respectively, the lower surface of the upper slide (21) is fixedly installed with the upper slide block (24), the upper slide block (24) is slidably connected to the outer surface of the upper slide rail (5), the lead screw (4) passes through the upper slide (21) and is fixedly connected with the upper slide (21);The upper surface of the lower slide (22) is fixedly installed with the lower slide block (25), the lower slide block (25) is slidably connected to the outer surface of the lower slide rail (6), the lower slide (22) is fixedly installed with the pipe expanding device (7) below.

2. A travelling device for expansion device of pipe thread tapping machine according to claim 1, characterized in that: The surface of the upper slide (21) is provided with a through hole, the lead screw (4) passes through the through hole, the outer surface of the lead screw (4) is respectively connected with the first nut (8) and the second nut (9) through thread, the first nut (8) and the second nut (9) are respectively located on both sides of the through hole, and the first nut (8) and the second nut (9) respectively abut the two side surfaces of the upper slide (21).

3. A travelling device for expansion device of pipe thread tapping machine according to claim 1, characterized in that: The telescopic cylinder (3) is fixedly installed with the right angle plate (10) on both end surfaces, the upper surface of the support (1) is fixedly installed with a plurality of parallel mounting blocks (11), the mounting block (11) is provided with a strip-shaped locking groove (12), the axis of the strip-shaped locking groove (12) is parallel with the axis of the lead screw (4), the locking bolt (13) is installed on both sides of the right angle plate (10), the stud end of the locking bolt (13) passes through the right angle plate (10) and is fixedly connected with the strip-shaped locking groove (12) through thread.

Images