A long round tube external lathe

By designing the top mandrel fixation and the mandrel drive to apply axial pressure in the outer circle lathe of the oblong tube, the problem of large machining errors of the pipe fittings is solved, and the stable installation of the feed shaft is achieved through the engagement of the worm and the adjustment groove, and the machining accuracy and stability are improved.

CN222740318UActive Publication Date: 2025-04-11洛阳星利达热力设备有限公司
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Patent Information

Application Number
CN202323635686.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-29
Publication Date
2025-04-11
Estimated Expiration
2033-12-29

AI Technical Summary

Technical Problem

During the outer circumferential processing of the oblong tube, the end of the pipe fitting is affected by the cutting force of the turning tool and the jumping of the other end, resulting in a large processing error. Especially in pipe fittings such as fin tubes that are not suitable for fixing with large outer pressures, the processing accuracy is affected.

Method used

By designing an oblong tube outer circle lathe, the machining end of the pipe fitting is fixed using the top mandrel part, and axial pressure is applied through the mandrel drive to reduce the jump of the pipe fitting. At the same time, through the engagement of the worm and the adjustment groove, one-way transmission is realized and the installation of the feed shaft is stable.

Benefits of technology

It effectively reduces the jump during processing of pipe fittings, improves processing accuracy, and ensures the stability of the processing process through the stable installation of feed shaft.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of lathes, specifically a long round tube external cylindrical lathe, including a bed, a three-jaw chuck at the upper end of the bed, a top spindle slidably mounted in the bed, a spindle drive rotatably mounted at one end of the top spindle away from the fixed tailstock, a main shaft slidably sleeved on the outer side of the top spindle, a cutter disc fixedly mounted at one end of the spindle close to the fixed tailstock, a feed shaft slidably mounted on the bed, a feed drive mounted at the output end of the feed shaft, a drive shaft rotatably mounted on the bed, and one end of the top spindle away from the fixed tailstock slidably mounted on the inner side of the drive shaft, and the drive shaft is connected to a main drive motor. The present application fixes the processing end of the pipe fitting by the top spindle part, and the spindle drive always applies axial pressure to the pipe fitting through the top spindle, fixes the end of the pipe fitting, reduces the vibration of the pipe fitting during processing, and thus improves the processing accuracy.
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Description

Technical Field

[0001] The present application relates to the technical field of lathes, and in particular to a long round tube external cylindrical lathe. Background Art

[0002] When performing external processing of round tubes, such as chamfering and grooving, it is sometimes necessary to perform the processing at the end of the round tube. When the length of the round tube is much larger than the diameter of the round tube, the end being processed is affected by the cutting force of the turning tool and the runout of the other end during processing, resulting in a large error in the runout of the processed end. This is especially true for fin tubes and other pipes with working structures on the outside and thin-walled pipes that are not suitable for fixing by large external pressure. The runout of the processed end of the pipe greatly affects the processing accuracy. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of this application is to provide a long tube external cylindrical lathe with improved machining accuracy.

[0004] The above application objectives of this application are achieved through the following technical solutions:

[0005] A long round tube external cylindrical lathe, comprising:

[0006] A bed, the bed comprising a base, on which a mounting box is mounted;

[0007] A fixed tailstock, the fixed tailstock is mounted on the upper end of the base, and a three-jaw chuck is mounted on the fixed tailstock;

[0008] A top core shaft, the top core shaft is slidably installed in the installation box;

[0009] A top, the top being rotatably mounted on one end of the top spindle close to the fixed tailstock;

[0010] A spindle drive, wherein the spindle drive output end is rotatably mounted on an end of the top spindle away from the fixed tailstock;

[0011] A main shaft, the main shaft is slidably sleeved on the outer side of the top central shaft, and the main shaft is circumferentially fixed to the top central shaft;

[0012] A cutter disc, the cutter disc is fixedly mounted on one end of the spindle close to the fixed tailstock, and a turning tool is detachably mounted on the cutter disc;

[0013] A feed shaft, the feed shaft is slidably mounted on the mounting box, and the feed shaft is axially fixed to the spindle;

[0014] Feed drive, the feed drive output end is installed on the feed shaft to drive the feed shaft to slide;

[0015] A driving shaft, the driving shaft is rotatably mounted on the mounting box, one end of the top shaft away from the fixed tailstock is slidably mounted on the inner side of the driving shaft, and the driving shaft is circumferentially fixed to the top shaft;

[0016] A main drive motor, wherein an output end of the main drive motor is connected to the drive shaft.

[0017] Optionally, an adjustment groove is provided on the outer side of the feed shaft, and a worm is rotatably mounted on the feed shaft, the worm is connected to the feed drive output end, and the worm engages with the adjustment groove.

[0018] Optionally, a mounting hole is provided at one end of the top spindle close to the fixed tailstock, a mounting sleeve is rotatably mounted in the mounting hole, and the top spindle is detachably embedded in the mounting sleeve.

[0019] Optionally, the end of the top away from the top axis is conical.

[0020] Optionally, the fixed tail stock can be slidably mounted on the upper end of the base, and a fixing member is provided between the fixed tail stock and the base.

[0021] Optionally, the turning tool can be slidably mounted on the cutter disc, and the cutter disc is threadedly connected with a diameter adjusting bolt, and the diameter adjusting bolt abuts against the turning tool.

[0022] Optionally, an adaptor rod is rotatably mounted on one end of the top spindle away from the fixed tailstock, and the spindle drive output end is fixedly mounted on the adaptor rod.

[0023] Optionally, the spindle drive is a hydraulic cylinder.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] The processing end of the pipe is fixed by the top mandrel part. The mandrel drive always applies axial pressure to the pipe through the top mandrel to fix the end of the pipe, reduce the vibration of the pipe during processing and improve the processing accuracy.

[0026] Through the meshing of the worm and the adjusting groove, the worm rotates to drive part of the adjusting groove to move, thereby driving the feed shaft to feed. At the same time, a one-way transmission is formed between the adjusting groove and the worm, and the adjusting groove can only be driven by the worm, thereby reducing the sliding of the feed shaft when not feeding and making the feed shaft installation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the structure inside the installation box of an embodiment of the present application.

[0029] Reference numerals: 1, bed; 11, base; 12, installation box;

[0030] 2. Fix the tailstock; 21. Fixing parts;

[0031] 31. Top spindle; 311. Adapter rod; 32. Top; 33. Spindle drive; 34. Install sleeve;

[0032] 41. spindle; 42. cutter head; 421. diameter adjustment bolt;

[0033] 51, feed shaft; 511, adjustment groove; 512, worm; 52, feed drive;

[0034] 61. Drive shaft; 62. Main drive motor. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] See also Figure 1 and Figure 2 , is a long round tube external cylindrical lathe disclosed in an embodiment of the present application, including a bed 1, the bed 1 includes a base 11, an installation box 12 is installed on the base 11, a fixed tailstock 2 is installed on the upper end of the base 11, a three-jaw chuck is installed on the fixed tailstock 2, a top spindle 31 is slidably installed in the installation box 12, a top spindle 32 is rotatably installed at one end of the top spindle 31 close to the fixed tailstock 2, a spindle drive 33 is rotatably installed at one end of the top spindle 31 away from the fixed tailstock 2, an output end of the spindle drive 33 abuts against the top spindle 31, a spindle 41 is slidably sleeved on the outer side of the top spindle 31, and the spindle 41 The main shaft 41 is circumferentially fixed to the top center shaft 31, and a cutter disc 42 is fixedly installed at one end of the main shaft 41 close to the fixed tail stock 2. A turning tool is detachably installed on the cutter disc 42. A feed shaft 51 is slidably installed on the mounting box 12. The feed shaft 51 is axially fixed to the main shaft 41. A feed drive 52 is installed at the output end of the feed shaft 51. The feed drive 52 drives the feed shaft 51 to slide. A drive shaft 61 is rotatably installed on the mounting box 12. The top center shaft 31 is slidably installed on the inner side of the drive shaft 61 at one end away from the fixed tail stock 2. The drive shaft 61 is circumferentially fixed to the top center shaft 31, and the drive shaft 61 is connected to a main drive motor 62.

[0037] Specifically, the fixed tailstock 2 and the top spindle 31 jointly fix the pipe to be processed, the top spindle 32 is inserted into the processing end of the pipe to reduce the vibration of the pipe during processing, the drive shaft 61 is sleeved on the outside of the top spindle 31 and is circumferentially fixed, the drive shaft 61 drives the top spindle 31 to rotate, the top spindle 31 drives the circumferentially fixed main spindle 41 to rotate, and the main spindle 41 drives the turning tool to perform turning.

[0038] In this way, by fixing the processing end of the pipe fitting through the top spindle 31 part, the spindle drive 33 always applies axial pressure to the pipe fitting through the top spindle 31, fixes the end of the pipe fitting, reduces the vibration of the pipe fitting during processing and thus improves the processing accuracy.

[0039] In some feasible embodiments, the base 11 and the installation box 12 are rectangular box structures, the installation box 12 includes a main spindle box, a main drive box and a top spindle box, the fixed tailstock 2 is an L-shaped plate, and the three-jaw chuck is fixedly installed on the L-shaped plate.

[0040] The spindle box is provided with a mounting hole coaxial with the three-jaw chuck, and the feed shaft 51 can be slidably installed in the mounting hole. In order to ensure the stable installation of the feed shaft 51, a bracket can be provided in the spindle box to support the feed shaft 51. In order to reduce the rotation of the feed shaft 51, the feed shaft 51 is connected to the bracket with a sliding key. The spindle 41 is rotatably installed in the feed shaft 51, and the cutter head 42 is fixedly connected to the end of the feed shaft 51 with bolts. Bearings are installed between the feed shaft 51 and both ends of the spindle 41. When the feed shaft 51 moves axially, the spindle 41 is pushed to feed through the bearings. The top spindle 31 is slidably installed in the spindle 41. The spindle 41 is connected to the top spindle 31 with a sliding key, so that the top spindle 31 can drive the spindle 41 to rotate. The end of the spindle 31 passes through the main spindle box, the drive shaft 61 is rotatably connected to one side of the spindle box through which the top spindle 31 passes, the drive shaft 61 is connected to the top spindle 31 with a sliding key, the outer side of the drive shaft 61 is fixedly connected to a pulley, the main drive motor 62 is connected to the drive shaft 61 with a belt, the main drive box is bolted and fixedly installed on the main spindle box, the main drive box is sleeved on the outer side of the drive shaft 61, and the top spindle 31 passes through the main drive box. In order to facilitate the connection with the spindle drive 33, an adapter rod 311 is rotatably installed on the shaft end of the top spindle 31. The spindle drive 33 is selected as a hydraulic cylinder, and the output end of the hydraulic cylinder is fixedly connected to the adapter rod 311, and the adapter rod 311 is axially fixed to the top spindle 31, so that the spindle drive 33 drives the top spindle 31 to slide.

[0041] As a specific embodiment of a long round tube external cylindrical lathe provided in the application, an adjustment groove 511 is provided on the outer side of the feed shaft 51, and a worm 512 is rotatably installed in the installation box 12. The worm 512 is connected to the output end of the feed drive 52, and the worm 512 engages with the adjustment groove 511.

[0042] In general, through the engagement between the worm 512 and the adjustment groove 511, the worm 512 rotates to drive part of the adjustment groove 511, thereby driving the feed shaft 51 to feed. At the same time, a one-way transmission is formed by the adjustment groove 511 and the worm 512, and the adjustment groove 511 can only be driven by the worm 512, thereby reducing the sliding of the feed shaft 51 when not feeding, and making the feed shaft 51 more stably installed.

[0043] As another specific embodiment of a long round tube external cylindrical lathe provided in the application, a mounting hole is opened at one end of the top spindle 31 close to the fixed tailstock 2, a mounting sleeve 34 is rotatably installed in the mounting hole, and the top spindle 32 is detachably embedded in the mounting sleeve 34.

[0044] In combination with a specific usage scenario, when in use, the tip 32 is inserted into a pipe to fix the pipe. By providing a mounting sleeve 34 and a detachable tip 32, it is convenient to replace the corresponding tip 32 according to pipes of different diameters.

[0045] Furthermore, one end of the top 32 away from the top spindle 31 is conical.

[0046] It should be understood that by providing the conical tip 32, when the tip 32 abuts against the end of the pipe, the pressure of the pipe driven by the spindle 33 is partially coaxial with the tip 32, thereby improving the installation accuracy and further improving the processing accuracy.

[0047] In some feasible embodiments, a bearing is provided between the mounting sleeve 34 and the mounting hole, the inner side of the mounting sleeve 34 is provided as a conical surface, and the end of the tip 32 inserted into the mounting sleeve 34 is provided as a conical end to improve the coaxiality between the tip 32 and the mounting sleeve 34.

[0048] As a specific implementation of the long round tube external cylindrical lathe provided in the application, please refer to Figure 1 The fixed tailstock 2 is slidably mounted on the upper end of the base 11 , and a fixing member 21 is provided between the fixed tailstock 2 and the base 11 .

[0049] It should be understood that by providing a slidably fixed tailstock 2, it is convenient to match pipe fittings with different clamping jaw positions by adjusting the position of the fixed tailstock 2.

[0050] In some feasible embodiments, two round tubes are fixedly connected to the bottom of the fixed tailstock 2, and two cylindrical rods are fixedly connected to the upper end of the base 11. The round tubes can be slidably mounted on the cylindrical rods. The fixing parts 21 are bolts threadedly connected to the side walls of the round tubes. When fixed, the bolts are against the cylindrical rods.

[0051] As a specific implementation of a long round tube external cylindrical lathe provided in the application, the turning tool can be slidably installed on the cutter head 42, and the cutter head 42 is threadedly connected with a diameter adjusting bolt 421, and the diameter adjusting bolt 421 is against the turning tool.

[0052] It should be understood that by providing a sliding turning tool, it is convenient to change the position of the turning tool, which not only changes the turning depth, but also makes it convenient to adjust the turning tool position according to different pipe diameters.

[0053] In some feasible embodiments, a rectangular block is fixedly mounted on the end surface of the cutter disc 42, a mounting hole is opened on the rectangular block, the turning tool can be slidably embedded in the mounting hole, and the diameter adjusting bolt 421 is threadedly connected to the rectangular block and penetrates into the mounting hole.

[0054] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A long round tube external cylindrical lathe, characterized in that: include: A bed (1), the bed (1) comprising a base (11), and a mounting box (12) is mounted on the base (11); A fixed tailstock (2), the fixed tailstock (2) being mounted on the upper end of the base (11), and a three-jaw chuck being mounted on the fixed tailstock (2); A top core shaft (31), the top core shaft (31) being slidably mounted in the mounting box (12); A center pin (32), the center pin (32) being rotatably mounted on one end of the center spindle (31) close to the fixed tailstock (2); A spindle drive (33), wherein an output end of the spindle drive (33) is rotatably mounted on an end of the top spindle (31) away from the fixed tailstock (2); A main shaft (41), the main shaft (41) being slidably sleeved on the outside of the top central shaft (31), the main shaft (41) and the top central shaft (31) being circumferentially fixed; a cutter disc (42), the cutter disc (42) being fixedly mounted on one end of the main shaft (41) close to the fixed tailstock (2), and the cutter disc (42) being detachably mounted with a turning tool; A feed shaft (51), the feed shaft (51) being slidably mounted on the mounting box (12), and the feed shaft (51) being axially fixed to the main shaft (41); A feed drive (52), wherein an output end of the feed drive (52) is mounted on the feed shaft (51) to drive the feed shaft (51) to slide; a driving shaft (61), the driving shaft (61) being rotatably mounted on the mounting box (12), the top center shaft (31) being slidably mounted on the inner side of the driving shaft (61) at one end away from the fixed tail stock (2), the driving shaft (61) being circumferentially fixed to the top center shaft (31); A main drive motor (62), wherein an output end of the main drive motor (62) is connected to the drive shaft (61).

2. A long round tube external cylindrical lathe according to claim 1, characterized in that: An adjustment groove (511) is provided on the outer side of the feed shaft (51), and a worm (512) is rotatably mounted on the feed shaft (51), the worm (512) is connected to the output end of the feed drive (52), and the worm (512) engages with the adjustment groove (511).

3. The long round tube external cylindrical lathe according to claim 1, characterized in that: A mounting hole is formed at one end of the top spindle (31) close to the fixed tailstock (2), a mounting sleeve (34) is rotatably mounted in the mounting hole, and the top spindle (32) is detachably embedded in the mounting sleeve (34).

4. The long round tube external cylindrical lathe according to claim 3, characterized in that: The end of the top tip (32) away from the top spindle (31) is conical.

5. The long round tube external cylindrical lathe according to claim 1, characterized in that: The fixed tailstock (2) is slidably mounted on the upper end of the base (11), and a fixing member (21) is provided between the fixed tailstock (2) and the base (11).

6. The long round tube external cylindrical lathe according to claim 1, characterized in that: The turning tool is slidably mounted on the tool disc (42); the tool disc (42) is threadedly connected with a diameter-adjusting bolt (421); the diameter-adjusting bolt (421) abuts against the turning tool.

7. The long round tube external cylindrical lathe according to claim 1, characterized in that: An adaptor rod (311) is rotatably mounted on one end of the top spindle (31) away from the fixed tailstock (2), and an output end of the spindle drive (33) is fixedly mounted on the adaptor rod (311).

8. The long round tube external cylindrical lathe according to claim 7, characterized in that: The spindle drive (33) is a hydraulic cylinder.