Tool for conveniently machining external threads of cylindrical workpiece
By designing a tool for external threads on cylindrical workpieces and using a lathe for automated machining, the problem of low efficiency in manual machining is solved, and efficient and low-cost thread machining is achieved.
Patent Information
- Application Number
- CN202520463024.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Existing technologies for manually machining external threads on cylindrical workpieces during maintenance are inefficient, labor-intensive, and difficult to automate.
A tool comprising a fixed sleeve, a sliding sleeve, a die, a limit bolt, and a locking bolt is designed to perform external thread machining on a cylindrical workpiece using a lathe. The sliding sleeve slides into the fixed sleeve, and the die is fixed by the locking bolt to achieve automatic threading.
It improved processing efficiency, reduced manual operation, improved processing quality, and reduced labor intensity.
Smart Images
Figure CN223889075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tool for machining external threads on cylindrical workpieces, belonging to the field of machining tool technology. Background Technology
[0002] In the machinery industry, external thread machining is a very common machining method, which is usually divided into two types: mechanical machining and manual machining. In mechanical machining, the workpiece is clamped on the jaws of a lathe, and the lathe is started to use a cutting tool to machine the thread on the outer wall or inner hole of the workpiece. This method is generally used for workpieces with larger diameters. Manual machining generally uses taps and dies to tap and thread the workpiece. This machining method is suitable for workpieces with smaller diameters. There are two forms of manual die-locking. One is to fix the cylindrical workpiece and use a wrench to manually lock the die, which is time-consuming, labor-intensive, and inefficient. The other is to fix the cylindrical workpiece on the lathe chuck, start the lathe to rotate the cylindrical workpiece, and then use a wrench to press the die onto the end of the cylindrical workpiece. After the die is inserted into the outer wall of the cylindrical workpiece, the die will move along the axial direction of the cylindrical workpiece due to the relative movement between the die and the cylindrical workpiece, thus completing the lock-locking. During this lock-locking process, the worker must constantly use the wrench to fix the die, prevent the die from rotating, and move the wrench with the die to ensure relative movement between the cylindrical workpiece and the die.
[0003] With technological advancements and production development, mechanized and automated production has gradually replaced manual operation. The machining of external and internal threads on workpieces is mostly performed by specialized automatic machine tools. Manual cutting and machining with taps and dies are now limited to maintenance work, and large-scale production is rare. However, manual operation is still indispensable in maintenance work. Therefore, it is still necessary to improve the threading tools used in maintenance to increase processing efficiency and reduce the workload and labor intensity of workers. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a tool for conveniently machining the external threads of cylindrical workpieces. This tool can use a lathe to machine the external threads of cylindrical workpieces without manual operation, which can significantly improve machining efficiency and product quality.
[0005] The technical solution to the above technical problem is:
[0006] A tool for conveniently machining external threads on cylindrical workpieces includes a fixed sleeve, a sliding sleeve, a die, a limiting bolt, and a locking bolt. The rear part of the fixed sleeve is a round rod with a flat block at its rear end, which is clamped in a lathe tailstock. The front part of the fixed sleeve is a sleeve with a sliding groove along its length on its wall. The sliding sleeve is a round tube with an outer diameter that matches the inner diameter of the sleeve at the front of the fixed sleeve. The sliding sleeve is placed in the inner diameter of the sleeve at the front of the fixed sleeve, allowing the sliding... The outer wall of the sleeve and the inner wall of the sleeve are in sliding fit. The outer wall of the rear end of the sliding sleeve has a vertical limiting screw hole. The limiting bolt is tightened to the limiting screw hole on the outer wall of the sliding sleeve through the sliding groove on the fixed sleeve. The limiting bolt and the sliding groove are in sliding fit. The front part of the sliding sleeve extends out of the front end of the fixed sleeve. The die is placed in the inner hole of the front end of the sliding sleeve. The front part of the sliding sleeve has a locking screw hole that is opposite to the outer circumference of the die. The front end of the locking bolt is tightened to the outer circumference of the die through the locking screw hole.
[0007] The aforementioned tool for facilitating the machining of external threads on cylindrical workpieces has a front sleeve with a length greater than the length of the external thread portion of the cylindrical workpiece being machined. The sliding sleeve extending from the front sleeve of the fixed sleeve has a circular protrusion on its circumference, a locking screw hole located on the circular protrusion, and a die placed in the inner hole of the sliding sleeve inside the circular protrusion.
[0008] The beneficial effects of this utility model are:
[0009] The rear end of the fixed sleeve of this utility model is fixedly connected to the tailstock of the lathe, which can ensure that the fixed sleeve will not move or rotate during use; the sliding sleeve can slide in the front sleeve of the fixed sleeve, and the sliding groove and the limiting bolt of the fixed sleeve allow the sliding sleeve to slide along the fixed sleeve without rotating; the die is fixedly connected to the front end of the sliding sleeve by the locking bolt, and the die can fasten the cylinder by relative rotation with the cylindrical workpiece being fastened; the die fastening causes the rod along the cylindrical workpiece to move, and at the same time drives the sliding sleeve to move together, and the sliding sleeve can restrain the die from rotating.
[0010] This utility model has a simple structure, is easy to use, and has low manufacturing cost. It can use a lathe to process the external threads of cylindrical workpieces without manual operation, which can significantly improve processing efficiency and product quality. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 yes Figure 1 A sectional view;
[0013] Figure 3This is a schematic diagram of the fixed sleeve handle;
[0014] Figure 4 This is a schematic diagram of the sliding sleeve.
[0015] The markings in the diagram are as follows: 1. Fixed sleeve handle; 2. Sliding sleeve; 3. Die; 4. Limiting bolt; 5. Locking bolt; 6. Flat block; 7. Sleeve; 8. Sliding groove; 9. Limiting screw hole; 10. Locking screw hole; 11. Circular protrusion. Detailed Implementation
[0016] This utility model consists of a fixed sleeve 1, a sliding sleeve 2, a die 3, a limiting bolt 4, and a locking bolt 5.
[0017] Figure 1 , 2 As shown in Figure 3, the rear part of the fixed sleeve 1 is a round rod, and the rear end of the round rod has a flat block 6. The flat block 6 is clamped in the tailstock of the lathe to fix the fixed sleeve 1. The front part of the fixed sleeve 1 is a sleeve 7. The length of the sleeve 7 is greater than the length of the external thread portion of the cylinder being machined. There is a sliding groove 8 on the sleeve wall along the length direction of the sleeve 7. The sliding groove 8 is used for the sliding of the limiting bolt 4. The limiting bolt 4 serves to prevent the sliding sleeve 2 from rotating.
[0018] Figure 1 , 2 As shown in Figure 4, the sliding sleeve 2 is a round tube, and the outer diameter of the sliding sleeve 2 matches the inner diameter of the sleeve 7 at the front of the fixed sleeve handle 1. The sliding sleeve 2 is placed in the inner hole of the sleeve 7 at the front end of the fixed sleeve handle 1, and the outer wall of the sliding sleeve 2 and the inner wall of the sleeve 1 are in sliding fit.
[0019] Figure 1 , 2 As shown in Figure 4, the outer wall of the rear end of the sliding sleeve 2 has a vertical limiting screw hole 9. The limiting bolt 4 is tightened to the limiting screw hole 9 on the outer wall of the sliding sleeve 2 through the sliding groove 8 on the sleeve 7 of the fixed sleeve 1. The limiting bolt 4 and the side wall of the sliding groove 8 are in sliding fit. The sliding sleeve 2 can slide in the fixed sleeve 1, but cannot rotate due to the action of the limiting bolt 4.
[0020] Figure 1 , 2 As shown in section 4, the front part of the sliding sleeve 2 extends beyond the front end of the sleeve 7 of the fixed sleeve 1. The sliding sleeve 2 extending beyond the front part of the sleeve 7 of the fixed sleeve 1 has a circular protrusion 11 on its circumference, and a vertically downward locking screw hole 10 on the circular protrusion 11. The inner diameter of the sliding sleeve 2 matches the outer diameter of the die 3. The die 3 is placed in the inner hole of the sliding sleeve 2 inside the circular protrusion 11 at the front end of the sliding sleeve 2. The locking bolt 5 is screwed into the locking screw hole 10. The front end of the locking bolt 5 is tightly connected to the outer circumference of the die 3 through the locking screw hole 10. The die 3 can move with the sliding sleeve 2, but cannot rotate.
[0021] The method of using this utility model is as follows:
[0022] When in use, the flat end of the flat block 6 sleeve 1 at the rear end of the fixed sleeve 1 is inserted into the tailstock of the lathe and fixed. The sliding sleeve 2 is placed in the fixed sleeve 1 and positioned by the limit bolt 4. The die 3 is placed on the front end of the sliding sleeve 2 and tightened with the locking bolt 5. At the same time, the rear end of the cylindrical workpiece to be processed is mounted on the chuck of the lathe headstock and fixed.
[0023] Move the tailstock of the lathe to move the fixed sleeve 1 until the die 3 at the front end of the sliding sleeve 2 contacts and clamps the end face of the cylindrical workpiece being machined. Start the lathe so that the chuck drives the cylindrical workpiece to rotate in the forward direction. Manually push the tailstock of the lathe so that the die 3 engages with the cylindrical workpiece. The threaded teeth of the die 3 rotate relative to the cylindrical workpiece to generate threads.
[0024] After the buckling begins, the cylinder rotates continuously, generating relative rotation with the die 3. The threads in the die 3 will continuously cut the cylindrical workpiece to generate new threads under the guidance of the already generated threads. As the die 3 buckles forward along the cylindrical workpiece, the die 3 drives the sliding sleeve 2 to slide forward along the sleeve 7 of the fixed sleeve handle 1. The limit bolt 4 ensures that the sliding sleeve 2 slides smoothly without rotating.
[0025] After the die 3 moves to the required length of the thread, the lathe chuck stops rotating and then the lathe chuck rotates in the opposite direction. Under the action of the reverse force generated by the threaded thread, the die 3 will drive the sliding sleeve 2 to move in the opposite direction along the sleeve 7 of the fixed sleeve shank 1. Finally, the die 3 disengages from the cylindrical workpiece being processed, completing one threading operation.
[0026] An embodiment of this utility model is as follows:
[0027] The length of the fixed sleeve 1 is 305mm, the length of the flat block 6 is 25mm and the thickness is 16mm, the length of the sleeve 7 is 150mm, the outer diameter is 45mm and the inner diameter is 35mm, and the length of the sliding groove 8 is 122mm and the width is 10mm.
[0028] The sliding sleeve 2 has a length of 144mm, an outer diameter of 34mm, an inner diameter of 19mm, a limit screw hole 9 with a diameter of 8mm, a locking screw hole 10 with a diameter of 6mm, and an annular protrusion 11 with a width of 19mm, an outer diameter of 45mm, and an inner diameter of 25mm.
[0029] The diameter of the limit bolt 4 is 8mm and the length is 20mm;
[0030] The diameter of the locking bolt 5 is 6mm and the length is 20mm;
[0031] The outer diameter of the 3rd die is 25mm, the inner tooth diameter is 8mm, and the thickness is 9mm.
Claims
1. A tool for conveniently machining external threads on cylindrical workpieces, characterized in that: It includes a fixed sleeve (1), a sliding sleeve (2), a die (3), a limiting bolt (4), and a locking bolt (5). The rear part of the fixed sleeve (1) is a round rod with a flat block (6) at the rear end. The flat block (6) is clamped in the tailstock of the lathe. The front part of the fixed sleeve (1) is a sleeve (7). The sleeve wall has a sliding groove (8) along the length of the sleeve (7). The sliding sleeve (2) is a round tube. The outer diameter of the sliding sleeve (2) matches the inner diameter of the sleeve (7) at the front of the fixed sleeve (1). The sliding sleeve (2) is placed in the inner hole of the sleeve (7) at the front end of the fixed sleeve (1). The outer wall of the sliding sleeve (2) is flush with the inner diameter of the sleeve (7). The wall is a sliding fit. The outer wall of the rear end of the sliding sleeve (2) has a vertical limiting screw hole (9). The limiting bolt (4) is tightened to the limiting screw hole (9) on the outer wall of the sliding sleeve (2) through the sliding groove (8) on the sleeve (7) of the fixed sleeve (1). The limiting bolt (4) and the sliding groove (8) are a sliding fit. The front part of the sliding sleeve (2) extends out of the front end of the sleeve (7) of the fixed sleeve (1). The die (3) is placed in the inner hole of the front end of the sliding sleeve (2). The front part of the sliding sleeve (2) has a locking screw hole (10) that is opposite to the outer circumference of the die (3). The front end of the locking bolt (5) is tightened to the outer circumference of the die (3) through the locking screw hole (10).
2. The tool for conveniently machining external threads on cylindrical workpieces according to claim 1, characterized in that: The length of the front sleeve (7) of the fixed sleeve (1) is greater than the length of the external thread portion of the cylindrical workpiece being processed. The circumference of the sliding sleeve (2) extending out of the front sleeve (7) of the fixed sleeve (1) has a circular protrusion (11). The locking screw hole (10) is located on the circular protrusion (11). The die (3) is placed in the inner hole of the sliding sleeve (2) inside the circular protrusion (11).