Adjustable threading die sleeve
By designing an adjustable die sleeve, the problem that the threading machine cannot adapt to the processing of long threaded parts is solved, and efficient processing of the electrode rod external thread and protection of the tool are achieved.
Patent Information
- Application Number
- CN202422145218.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The die sleeve on the existing threading machine is fixed in length and cannot be used for processing long threaded parts, resulting in difficult processing and severe tool wear.
An adjustable die sleeve is designed, which includes a fixed sleeve and a movable sleeve. The sliding and fixing of the movable sleeve are achieved through a limiter and a rotation-stop structure, and the length of the sleeve inner cavity is extended to adapt to the processing of electrode rods of different lengths.
The external thread processing of the electrode rod with a long length is realized, which improves the processing efficiency, reduces the tool wear, and enhances the processing accuracy and stability.
Smart Images
Figure CN223313142U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of mechanical processing technology, and in particular to an adjustable die sleeve. Background Art
[0002] The threads of the electrode rods used in high-efficiency EDM milling machines require high coaxiality and perpendicularity. Turning requires high tooling requirements and is difficult for workers to master. Even with CNC machining, the threads on the finished workpiece exhibit chatter marks and poor roughness. The threads require several turns to form, and tool wear is severe. Therefore, external threading of the electrode rods is typically performed using a threading machine with a die.
[0003] The length of the die sleeve on the existing threading machine is fixed, which is not suitable for processing some threaded parts with longer lengths, so further improvement is needed. Utility Model Content
[0004] In order to facilitate external thread processing of a long electrode rod, the present application provides an adjustable die sleeve.
[0005] The present application provides an adjustable die sleeve adopting the following technical solution:
[0006] An adjustable die sleeve comprises a fixed sleeve, a movable sleeve slidably inserted at the front end of the fixed sleeve along the axial direction, a clamping column fixedly connected to the rear end of the fixed sleeve, and a die arranged at the front end of the movable sleeve. The inner cavity of the movable sleeve is connected to the inner cavity of the fixed sleeve. A limiting hole is radially provided on the outer peripheral wall of the movable sleeve. There are multiple limiting holes and they are distributed at intervals along the axial direction of the movable sleeve. The fixed sleeve is provided with a limiting part embedded in the limiting hole.
[0007] By adopting the above technical solution, when processing the external thread of an electrode rod with a longer length, the clamping column at the rear end of the fixed sleeve is locked in the tailstock of the threading machine, and the sliding position of the movable sleeve is adjusted so that the movable sleeve slides away from the clamping column, thereby extending the overall length of the die sleeve, thereby extending the length of the inner cavity of the die sleeve, so that the electrode rod can be sequentially inserted into the inner hole of the die, the movable sleeve and the inner cavity of the fixed sleeve. After the adjustment is completed, the movable sleeve and the fixed sleeve are fixed by embedding the limiting piece in the limiting hole.
[0008] Preferably, a rotation-stop groove is axially provided at the front end of the fixed sleeve, the rotation-stop groove is connected to the inner cavity of the fixed sleeve, and a rotation-stop block slidably inserted in the rotation-stop groove is protruding and fixed on the outer peripheral wall of the movable sleeve.
[0009] By adopting the above technical solution, anti-rotation grooves and anti-rotation blocks are additionally provided, which effectively restrict the relative circumferential rotation of the movable sleeve and the fixed sleeve, and facilitate the alignment of the limiting hole and the limiting member.
[0010] Preferably, a first threaded hole communicating with the inner cavity is radially opened on the outer peripheral wall of the fixing sleeve, and the limiting member is a limiting bolt threadedly passed through the first threaded hole, and the end of the limiting bolt is inserted into the limiting hole.
[0011] By adopting the above technical solution, by loosening the limit bolt, the limit bolt is disengaged from the limit hole, and the sliding restriction on the movable sleeve is released, the sliding position of the movable sleeve can be slidably adjusted. When the required limit hole and the limit bolt are aligned, the limit bolt is tightened so that the end of the limit bolt is inserted into the limit hole to fix the movable sleeve.
[0012] Preferably, the front end outer wall of the fixed sleeve is radially provided with a through hole connected to the inner cavity, and the limiting member includes a limiting rod slidingly passed through the through hole and an elastic member arranged on the outer wall of the fixed sleeve to force the limiting rod to slide normally and be inserted into the limiting hole.
[0013] By adopting the above technical solution, when the position of the movable sleeve needs to be adjusted, a force is first applied to the limit rod to make the limit rod slide in the direction away from the axis of the movable sleeve, so that the limit rod slides out of the limit hole, thereby releasing the sliding restriction of the movable sleeve. At this time, the elastic member undergoes elastic deformation and has elastic potential energy, which can slide and adjust the sliding position of the movable sleeve. When the required limit hole and the limit rod are aligned, the force applied to the limit rod is removed, and the elastic member forces the limit rod to slide in the direction close to the axis of the movable sleeve, so that the end of the limit rod is inserted into the limit hole, and the movable sleeve is fixed again.
[0014] Preferably, the outer end of the limiting rod is fixedly connected to a force plate, the elastic member is a spring sleeved on the limiting rod, one end of the spring is fixedly connected to the outer wall of the fixed sleeve, and the other end of the spring is fixedly connected to the force plate.
[0015] By adopting the above technical solution, a force plate is added to provide a mounting carrier for the spring, and the spring has good elastic recovery performance and is easy to install.
[0016] Preferably, a countersunk hole is coaxially opened at the front end of the movable sleeve, the inner diameter of the countersunk hole is larger than the inner diameter of the movable sleeve, the die is inserted into the countersunk hole, and a second threaded hole connected to the countersunk hole is opened on the outer wall of the front end of the movable sleeve. The movable sleeve is provided with a fixing bolt threadedly connected to the second threaded hole, and the end of the fixing bolt is tightly pressed against the outer peripheral wall of the die.
[0017] By adopting the above technical solution, after the die is inserted into the countersunk hole, the fixing bolt is locked so that the end of the fixing bolt is pressed against the outer peripheral wall of the die, thereby fixing the die and the movable sleeve.
[0018] Preferably, the outer peripheral wall of the die is provided with an anti-drop hole for the end of the fixing bolt to be clamped.
[0019] By adopting the above technical solution, an anti-drop hole is added, and the end of the fixing bolt is clamped in the anti-drop hole to achieve complete fixation of the die and the movable sleeve. When the die with different thread diameters needs to be replaced, the fixing bolt can be unlocked.
[0020] Preferably, the front end of the movable sleeve is detachably connected to a guide sleeve for inserting the electrode rod.
[0021] By adopting the above technical solution, the electrode rod is inserted into the guide sleeve and then processed by the die threading, thereby effectively improving the thread coaxiality of the electrode rod.
[0022] Preferably, the front end of the movable sleeve is coaxially fixedly connected with a first flange, the guide sleeve is coaxially fixedly sleeved with a second flange, and the first flange and the second flange are fixed by bolts.
[0023] By adopting the above technical solution, the detachable connection between the guide sleeve and the movable sleeve is achieved through the first flange, the second flange and the bolts.
[0024] In summary, the present invention has the following beneficial effects:
[0025] 1. When processing external threads on a long electrode rod, lock the clamping column at the rear end of the fixed sleeve in the tailstock of the threading machine, and adjust the sliding position of the movable sleeve so that the movable sleeve slides away from the clamping column, thereby extending the overall length of the die sleeve and the inner cavity of the die sleeve, so that the electrode rod can be sequentially inserted into the inner hole of the die, the movable sleeve, and the inner cavity of the fixed sleeve. After the adjustment is completed, the movable sleeve and the fixed sleeve are fixed by embedding the limiting piece in the limiting hole;
[0026] 2. Loosen the limit bolt so that it comes out of the limit hole, thereby releasing the sliding restriction on the movable sleeve. Then, the sliding position of the movable sleeve can be adjusted. When the required limit hole and the limit bolt are aligned, tighten the limit bolt so that the end of the limit bolt is inserted into the limit hole to fix the movable sleeve.
[0027] 3. When the position of the movable sleeve needs to be adjusted, first apply a force to the limit rod to make the limit rod slide in the direction away from the axis of the movable sleeve, so that the limit rod slides out of the limit hole, thereby releasing the sliding restriction of the movable sleeve. At this time, the elastic member undergoes elastic deformation and has elastic potential energy, which can slide and adjust the sliding position of the movable sleeve. When the required limit hole and the limit rod are aligned, remove the force applied to the limit rod, and the elastic member forces the limit rod to slide in the direction close to the axis of the movable sleeve, so that the end of the limit rod is inserted into the limit hole, and the movable sleeve is fixed again. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1This is a schematic diagram of the overall structure of an adjustable die sleeve in Example 1;
[0029] Figure 2 is a cross-sectional view of the fixed sleeve and the movable sleeve in Example 1;
[0030] Figure 3 is a schematic structural diagram of the position limiting member in Example 2;
[0031] Figure 4 Schematic diagram of the connection structure between the guide sleeve and the die in Example 2.
[0032] In the figure, 1. fixed sleeve; 11. anti-rotation groove; 12. first threaded hole; 13. through hole; 2. movable sleeve; 21. anti-rotation block; 22. limiting hole; 23. countersunk hole; 24. fixing bolt; 25. second flange; 26. second threaded hole; 3. clamping column; 4. die; 41. anti-drop hole; 42. positioning hole; 5. limiting piece; 51. limiting rod; 52. spring; 53. force plate; 6. guide sleeve; 61. first flange; 62. positioning rod. DETAILED DESCRIPTION
[0033] The following is combined with Figure 1-4 This application is described in further detail.
[0034] Example 1:
[0035] The present application discloses an adjustable die sleeve, referring to Figure 1 It includes a fixed sleeve 1, a movable sleeve 2 that is coaxially slidably inserted at the front end of the fixed sleeve 1 along the axial direction, a clamping column 3 coaxially fixedly connected to the rear end of the fixed sleeve 1, and a die 4 coaxially arranged at the front end of the movable sleeve 2. The clamping column 3 is a tapered column, and the end of the clamping column 3 close to the fixed sleeve 1 is the large end, and the end of the clamping column 3 away from the fixed sleeve 1 is the small end.
[0036] Reference Figure 1 、 Figure 2 The inner diameter of the fixed sleeve 1 is adapted to the outer diameter of the movable sleeve 2. A rotation-stop groove 11 is axially provided at the front end of the fixed sleeve 1. The rotation-stop groove 11 is connected to the inner cavity of the fixed sleeve 1. In this embodiment, two rotation-stop grooves 11 are provided and symmetrically distributed along the axis. A rotation-stop block 21 is protruding and fixed on the outer peripheral wall of the movable sleeve 2 and is slidably inserted into the rotation-stop groove 11.
[0037] The inner cavity of the movable sleeve 2 is connected to the inner cavity of the fixed sleeve 1. The outer peripheral wall of the movable sleeve 2 has a radially defined limit hole 22. A plurality of limit holes 22 are provided and spaced apart along the axial direction of the movable sleeve 2. The front outer wall of the fixed sleeve 1 is provided with a limit member 5 embedded in the limit hole 22. In this embodiment, the front outer peripheral wall of the fixed sleeve 1 has a radially defined first threaded hole 12 connected to the inner cavity. The limit member 5 is a limit bolt threaded through the first threaded hole 12, with the end of the limit bolt inserted into the limit hole 22.
[0038] The front end of the movable sleeve 2 is coaxially defined by a countersunk hole 23, the inner diameter of which is larger than that of the movable sleeve 2. The die 4 is coaxially inserted into the countersunk hole 23. A second threaded hole 26, which communicates with the countersunk hole 23, is defined on the outer wall of the front end of the movable sleeve 2. The movable sleeve 2 is provided with a fixing bolt 24 threadedly connected to the second threaded hole 26. The outer peripheral wall of the die 4 is defined by an anti-drop hole 41 for the end of the fixing bolt 24 to be retained. To replace the die 4, simply unlock the fixing bolt 24, install the new die 4 in the countersunk hole 23, and re-lock the fixing bolt 24.
[0039] The implementation principle of this embodiment is: when processing the external thread of an electrode rod with a longer length, lock the clamping column 3 at the rear end of the fixed sleeve 1 in the tailstock of the threading machine, unlock the limit bolt, so that the limit bolt is out of the limit hole 22, and then adjust the sliding position of the movable sleeve 2 so that the movable sleeve 2 slides away from the clamping column 3, thereby extending the overall length of the die 4 sleeve, thereby extending the inner cavity length of the die 4 sleeve, so that the electrode rod can be sequentially inserted into the inner hole of the die 4, the movable sleeve 2 and the inner cavity of the fixed sleeve 1. After the adjustment is completed, re-lock the limit bolt so that the limit bolt is embedded in the next limit hole 22, thereby achieving the fixation of the movable sleeve 2 and the fixed sleeve 1.
[0040] Example 2:
[0041] The difference from Example 1 is that, referring to Figure 3 、 Figure 4 The front end outer peripheral wall of the fixed sleeve 1 is radially provided with a through-hole 13 that communicates with the inner cavity. The limiting member 5 includes a limiting rod 51 that slides through the through-hole 13 and an elastic member disposed on the outer wall of the fixed sleeve 1 to force the limiting rod 51 to slide normally and be inserted into the limiting hole 22. The outer end of the limiting rod 51 is fixedly connected to a force application plate 53. The elastic member is a spring 52 that is sleeved on the limiting rod 51. One end of the spring 52 is fixedly connected to the outer wall of the fixed sleeve 1, and the other end of the spring 52 is fixedly connected to the plate surface of the force application plate 53.
[0042] The front end of the movable sleeve 2 is detachably connected to a guide sleeve 6 for inserting the electrode rod. A first flange 61 is coaxially fixedly connected to the front end of the movable sleeve 2. The guide sleeve 6 is coaxially fixedly sleeved with a second flange 25. The first flange 61 and the second flange 25 are fixed by bolts. The guide sleeve 6 is an acrylic tube, making it transparent, facilitating observation of the thread of the die 4. The electrode rod is inserted into the guide sleeve 6 and then threaded through the die 4, effectively improving the coaxiality of the electrode rod thread. The end face of the guide sleeve 6 abuts the end face of the die 4. A positioning rod 62 is protruding and fixed on the end face of the guide sleeve 6. The axial direction of the positioning rod 62 is parallel to the axial direction of the guide sleeve 6. The end face of the die 4 is provided with a positioning hole 42 for inserting the positioning rod 62.
[0043] The implementation principle of this embodiment is: when the position of the movable sleeve 2 needs to be adjusted, a force is first applied to the force plate 53 to make the limit rod 51 slide in the direction away from the axis of the movable sleeve 2, so that the limit rod 51 slides out of the limit hole 22, thereby releasing the sliding restriction on the movable sleeve 2. At this time, the spring 52 undergoes elastic deformation and has elastic potential energy, which can slide and adjust the sliding position of the movable sleeve 2. When the required limit hole 22 and the limit rod 51 are aligned, the force applied to the force plate 53 is removed, and the spring 52 forces the limit rod 51 to slide in the direction close to the axis of the movable sleeve 2, so that the end of the limit rod 51 is inserted into the limit hole 22, and the movable sleeve 2 is re-fixed.
[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An adjustable die sleeve, characterized in that: The invention comprises a fixed sleeve (1), a movable sleeve (2) slidably inserted at the front end of the fixed sleeve (1) along the axial direction, a clamping column (3) fixedly connected to the rear end of the fixed sleeve (1), and a die (4) arranged at the front end of the movable sleeve (2); the inner cavity of the movable sleeve (2) is connected to the inner cavity of the fixed sleeve (1); the outer peripheral wall of the movable sleeve (2) is provided with a limiting hole (22) along the radial direction; the limiting holes (22) are provided in plurality and are distributed at intervals along the axial direction of the movable sleeve (2); the fixed sleeve (1) is provided with a limiting member (5) embedded in the limiting hole (22); the front end of the movable sleeve (2) is detachably connected to a guide sleeve (6) for inserting an electrode rod; the front end of the movable sleeve (2) is coaxially fixedly connected to a first flange (61); the guide sleeve (6) is coaxially fixedly provided with a second flange (25); the first flange (61) and the second flange (25) are fixed by bolts.
2. The adjustable die sleeve according to claim 1, characterized in that: The front end of the fixed sleeve (1) is provided with a rotation-stop groove (11) along the axial direction, the rotation-stop groove (11) is connected to the inner cavity of the fixed sleeve (1), and a rotation-stop block (21) is fixed on the outer peripheral wall of the movable sleeve (2) and is slidably inserted into the rotation-stop groove (11).
3. The adjustable die sleeve according to claim 1, characterized in that: The outer peripheral wall of the fixing sleeve (1) is radially provided with a first threaded hole (12) connected to the inner cavity. The limiting member (5) is a limiting bolt threadedly inserted into the first threaded hole (12), and the end of the limiting bolt is inserted into the limiting hole (22).
4. The adjustable die sleeve according to claim 1, characterized in that: The front end outer peripheral wall of the fixed sleeve (1) is radially provided with a through hole (13) connected to the inner cavity, and the limiting member (5) comprises a limiting rod (51) slidingly penetrating the through hole (13) and an elastic member arranged on the outer wall of the fixed sleeve (1) to force the limiting rod (51) to slide normally and be inserted into the limiting hole (22).
5. The adjustable die sleeve according to claim 4, characterized in that: The outer end of the limiting rod (51) is fixedly connected to a force plate (53); the elastic member is a spring (52) sleeved on the limiting rod (51); one end of the spring (52) is fixedly connected to the outer wall of the fixed sleeve (1); and the other end of the spring (52) is fixedly connected to the force plate (53).
6. The adjustable die sleeve according to claim 1, characterized in that: A countersunk hole (23) is coaxially formed at the front end of the movable sleeve (2), the inner diameter of the countersunk hole (23) is larger than the inner diameter of the movable sleeve (2), the die (4) is inserted into the countersunk hole (23), a second threaded hole (26) connected to the countersunk hole (23) is formed on the outer wall of the front end of the movable sleeve (2), the movable sleeve (2) is provided with a fixing bolt (24) threadedly connected to the second threaded hole (26), and the end of the fixing bolt (24) is tightly pressed against the outer peripheral wall of the die (4).
7. The adjustable die sleeve according to claim 6, characterized in that: An anti-drop hole (41) for the end of the fixing bolt (24) to be clamped is provided on the outer peripheral wall of the die (4).