Numerical control lathe inner hole tensioning and positioning double-face machining tool
By designing studs and tensioning devices, the problem of workpiece deformation caused by excessive clamping during CNC lathe internal hole machining was solved, achieving efficient and stable workpiece machining, meeting concentricity, coaxiality and geometric tolerance requirements, and improving machining accuracy and efficiency.
Patent Information
- Application Number
- CN202422648489.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-31
AI Technical Summary
When machining the workpiece shown in Figure 5, the existing CNC lathe internal hole machining fixture has the problem of excessive clamping, which causes deformation of the workpiece's internal hole and makes it difficult to achieve the concentricity, coaxiality and geometric tolerance requirements of two clamping operations.
The device employs a stud and a tensioning device fitted onto the stud, including an external thread, a frustum, a sleeve, a groove, a collar, and a nut. The position of the tensioning device is adjusted by the nut. Combined with the elastic collar and slit design, it provides uniform tension force, ensuring the stability and accuracy of the workpiece during processing.
It achieves efficient and stable machining of workpieces, ensuring concentricity, coaxiality, and geometric tolerances during two clamping operations, thereby improving machining accuracy and work efficiency.
Smart Images
Figure CN223492097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, specifically to a double-sided machining fixture for tensioning and positioning the inner hole of a CNC lathe. Background Technology
[0002] like Figure 5 The workpiece 10 shown has a central hole. During machining, the inner holes on both sides need to be machined. The two clamping operations need to be concentric, coaxial, and meet the requirements of geometric tolerances.
[0003] Existing technology discloses a clamping fixture, publication number CN220972158U, including a clamping fixture body. A support base is provided at the bottom of the clamping fixture body. A connecting block is connected to the lower side of the clamping fixture body, and a connecting shaft is inserted inside the connecting block. An insertion rod is engaged inside the connecting shaft, and the other end of the insertion rod is connected to a gear. A gear ring is sleeved on the outer side of the gear, and the gear ring is connected to a connecting plate via a support rod. This utility model, by providing a connecting block and a connecting shaft, allows for adjustment of the angle of the clamping fixture body through the mutual cooperation of the connecting block and the connecting shaft, thereby adjusting the position of the clamped plastic shell. An mounting plate and a connecting rod are also provided.
[0004] Although the device can mate the clamping fixture body and the connecting block through the cooperation of the mounting plate and the connecting rod, thereby quickly installing the support base at the bottom of the clamping fixture body and enabling rapid modification of existing clamping fixture bodies, it still has limitations for… Figure 5 The workpiece shown still suffers from over-clamping and deformation of the inner hole after machining. Utility Model Content
[0005] To address the aforementioned technical problems or one of the technical problems existing in the prior art, this utility model discloses a double-sided machining fixture for tensioning and positioning the inner hole of a CNC lathe, comprising a stud and a tensioning device sleeved on the stud. One end of the stud is provided with an external thread, and a frustum is coaxially fixed to the middle of the stud. The tensioning device includes a sleeve sleeved on the frustum. The outer circumferential surface of the sleeve is provided with a groove in the circumferential direction, and a collar is provided in the groove. One end of the sleeve is provided with a cut and a slit, both of which are perpendicular to the groove. A nut is screwed onto the external thread.
[0006] Furthermore, an annular pressure plate is fixed to one end of the nut near the frustum.
[0007] Furthermore, the diameter of the end of the frustum closest to the frustum is smaller than the diameter of the other end.
[0008] Furthermore, two grooves are arranged in parallel.
[0009] Furthermore, there are two slits, which are arranged in a circumferential array together with the cut.
[0010] Furthermore, the collar is an elastic collar.
[0011] Compared with existing technologies, this utility model achieves a highly efficient and stable processing through its unique structure.
[0012] First, the external thread on the stud and the nut work together to easily adjust the position of the tensioning device to meet the processing requirements of different sizes; the frustum design allows the tensioning device to be stably fitted onto the stud, ensuring the stability of the processing.
[0013] The combined use of the sleeve and collar in the tensioning device can provide uniform tension force during processing, ensuring that the workpiece will not shift during processing, thereby improving processing accuracy and workpiece quality. The groove design allows the collar to be easily installed on the sleeve, while the notch and cut-off point design provide more uniform tension force and additional support for the collar's fixation, enhancing the structural strength of the entire tooling.
[0014] In addition, the design of this tooling also takes into account the ease of operation. The tensioning device can be fixed and released by simply adjusting the nut, ensuring that the two clampings are concentric, coaxial and meet the requirements of geometric tolerances, which greatly improves work efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the tensioning device of this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the stud of this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the nut of this utility model;
[0019] Figure 5 This is a schematic diagram of the structure of the workpiece of this utility model;
[0020] Figure 6 This is a schematic diagram of the structure for mounting the workpiece according to this utility model. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-6 The technical solution adopted by this utility model is as follows: a double-sided machining fixture for tensioning and positioning the inner hole of a CNC lathe, including a stud 1 and a tensioning device sleeved on the stud 1. One end of the stud 1 is provided with an external thread 12. A frustum 11 is coaxially fixed to the middle of the stud 1. The tensioning device includes a sleeve 2, which is sleeved on the frustum 11. The outer circumferential surface of the sleeve 2 is provided with a groove 21 in the circumferential direction. A collar 4 is provided in the groove 21. One end of the sleeve 2 is provided with a cut 23 and a cut-off 22. The cut 23 and the cut-off 22 are both perpendicular to the groove 21. A nut 3 is screwed onto the external thread 12.
[0023] Preferably, an annular pressure plate 31 is fixed to one end of the nut 3 near the frustum 11, which provides a uniform clamping force when the nut is tightened, disperses the pressure, and prevents local excessive compression or damage.
[0024] Preferably, the diameter of one end of the frustum 11 closer to the frustum 11 is smaller than the diameter of the other end, so that the frustum has a conical feature and can provide a smooth transition between the two end faces with different diameters.
[0025] Preferably, two grooves 21 are arranged in parallel to ensure the correct alignment of the collar and provide stable support.
[0026] Preferably, there are two slits 23, which are arranged in a circumferential array together with the cutting opening 22, allowing the annular plate to be opened or closed precisely at a specific position. The circumferential array of slits provides a uniform force distribution, making the annular plate more stable when under force, and also facilitating precise control.
[0027] Preferably, the collar 4 is an elastic collar, which provides good adaptability and elasticity, and can provide stable fixation on shafts or tubes of different diameters. The elastic collar can provide sufficient clamping force without damaging the object being fixed.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A double-sided machining fixture for tensioning and positioning the inner hole of a CNC lathe, comprising a stud (1) and a tensioning device sleeved on the stud (1), characterized in that, One end of the stud (1) is provided with an external thread (12), and a frustum (11) is coaxially fixed to the middle of the stud (1). The tensioning device includes a sleeve (2), which is sleeved on the frustum (11). The outer circumferential surface of the sleeve (2) is provided with a groove (21) in the circumferential direction. A collar (4) is provided in the groove (21). One end of the sleeve (2) is provided with a cut (23) and a cut-off (22). The cut (23) and the cut-off (22) are both perpendicular to the groove (21). A nut (3) is screwed onto the external thread (12).
2. The CNC lathe inner hole tensioning and positioning double-sided machining fixture according to claim 1, characterized in that, The nut (3) is fixed to an annular pressure plate (31) at one end near the frustum (11).
3. The CNC lathe inner hole tensioning and positioning double-sided machining fixture according to claim 1, characterized in that, The diameter of one end of the frustum (11) closer to the frustum (11) is smaller than the diameter of the other end.
4. The CNC lathe inner hole tensioning and positioning double-sided machining fixture according to claim 1, characterized in that, Two grooves (21) are arranged in parallel.
5. The CNC lathe inner hole tensioning and positioning double-sided machining fixture according to claim 1, characterized in that, There are two cuts (23), which are arranged in a circular array together with the cut (22).
6. The CNC lathe inner hole tensioning and positioning double-sided machining fixture according to claim 1, characterized in that, The collar (4) is an elastic collar.