Part clamping device
By introducing a head tensioning assembly, a center tensioning assembly, and a side tensioning assembly into the part clamping device, combined with an adjustable support, the problem of insufficient clamping reliability in the X direction of existing clamping devices is solved, and stable positioning and high-precision machining of workpieces are achieved.
Patent Information
- Application Number
- CN202423025145.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing clamping devices have low reliability in clamping workpieces in the X direction and are not firmly restricted in their rotational freedom around the X axis, which makes the workpiece prone to shifting during processing, affecting processing accuracy and strength performance.
A part clamping device is designed, comprising a head tensioning assembly, a center tensioning assembly, a side tensioning assembly, and an adjusting support. By providing clamping in the X and Y directions, and utilizing the coincidence of the axes of the center, the first tensioning shaft, and the second tensioning shaft, the device ensures stable positioning of the workpiece and adapts to surface changes through the adjustable support.
It improves the clamping rigidity and machining accuracy of the workpiece, prevents movement, ensures the strength performance and fatigue reliability of the workpiece, and improves the machining quality.
Smart Images
Figure CN223492668U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology for landing gear rotating parts, and in particular to a part clamping device. Background Technology
[0002] Rotating components of the landing gear, such as the outer cylinder, serve as part of the shock-absorbing struts, providing stability and safety to the landing gear under various operating conditions. The outer cylinder requires high manufacturing precision and quality; during machining, it needs to be reliably and precisely clamped to ensure stability and machining accuracy.
[0003] Existing clamping devices only provide clamping in the X direction (length direction) of the workpiece, resulting in low clamping reliability and weak restriction of the rotational freedom around the X-axis, making the workpiece prone to rotational movement during processing. If the clamping force and clamping position cannot be effectively controlled, this movement will cause indentations, vibration, or damage to the workpiece surface, thereby affecting the workpiece's strength properties and fatigue reliability. Utility Model Content
[0004] The purpose of this utility model is to provide a part clamping device to improve the rigidity of clamping and ensure the processing quality of parts.
[0005] The technical solution of this utility model is: a part clamping device, including a base, a top tip assembly disposed at one end of the base in the X direction, a head tensioning assembly disposed at the other end of the base in the X direction, and side tensioning assemblies disposed at both ends of the base in the Y direction. The top tip assembly is provided with a tip that can extend or retract toward the head tensioning assembly. The two side tensioning assemblies are displaced relative to each other or in opposite directions along a slide disposed on the base. The head tensioning assembly is provided with a first tensioning shaft, and the side tensioning assemblies are provided with a second tensioning shaft. The axes of the top tip, the first tensioning shaft, and the second tensioning shaft coincide.
[0006] Preferably, the head tensioning assembly further includes a first base and a first tension sleeve for mounting the first tension shaft on the first base, the first base being mounted on the base.
[0007] Preferably, the tip assembly further includes a second base, a mounting base, a handle, and a spring. The mounting base is mounted on the second base, the tip passes through the second base and the mounting base, and one end of the tip is connected to the handle. A spring is fitted on the tip, the spring is placed inside the mounting base, and the spring abuts against the mounting base and the tip respectively. The end of the handle near the mounting base is provided with a cam for pulling or pushing the tip to compress or extend the spring.
[0008] Preferably, the mounting base is located on the side away from the head tensioning component.
[0009] Preferably, the tip assembly further includes a second base, a locking element, and a guide rail base. The guide rail base is mounted on the base, the second base is mounted on the guide rail base via the locking element, and the tip is disposed on the second base.
[0010] Preferably, the side tensioning assembly further includes a lead screw rotatably disposed in the slide, a third base threadedly connected to the lead screw and slidably fitted to the slide, and a second expansion sleeve for mounting the second expansion shaft to the third base.
[0011] Preferably, the two lead screws extend to the outside of the slide block on opposite sides to form a drive end.
[0012] Preferably, the base is further provided with a plurality of height-adjustable supports in the Z direction, and the plurality of adjustable supports are positioned between the head tensioning component and the top component.
[0013] Preferably, the adjusting support includes a fourth base placed on the base, a screw threaded to the upper end of the fourth base, and a top block connected to the top of the screw.
[0014] Preferably, the base is also provided with lifting lugs around its perimeter.
[0015] Compared with related technologies, the beneficial effects of this utility model are as follows:
[0016] 1. In addition to the two clamps in the X direction, the part clamping device also has a clamp in the Y direction (width direction), which effectively limits the workpiece to prevent it from moving during processing, improves the rigidity of the clamping, and ensures the strength performance and fatigue reliability of the workpiece.
[0017] Second, the axes of the center, the first expansion shaft and the second expansion shaft are coincident, which can ensure that the parallelism between the workpiece and the machine tool is within 0.05mm after positioning, greatly improving the workpiece processing accuracy.
[0018] Third, the top is designed to be retractable, which facilitates the clamping and unloading of workpieces;
[0019] Fourth, the base is also equipped with an adjustable support for supporting the lower surface of the workpiece, which not only enhances the rigidity of the workpiece clamping, but also adapts to the curved surface of the workpiece through adjustment. Attached Figure Description
[0020] Figure 1 A three-dimensional structural diagram of the part clamping device provided by this utility model;
[0021] Figure 2 A front view schematic diagram of the part clamping device provided by this utility model;
[0022] Figure 3This is a cross-sectional view of the head tensioning component;
[0023] Figure 4 This is a partial cross-sectional view of the top component;
[0024] Figure 5 This is a cross-sectional schematic diagram of the side tensioning assembly;
[0025] Figure 6 A structural schematic diagram of the part from a first-person perspective;
[0026] Figure 7 This is a structural schematic diagram of the part from a second perspective.
[0027] In the attached diagram: 1. Head tensioning assembly; 11. First tension sleeve; 12. First tension shaft; 13. First base; 2. Base; 3. Adjustment support; 31. Fourth base; 32. Screw; 33. Top block; 4. Top assembly; 41. Top; 42. Spring; 43. Handle; 44. Second base; 45. Locking element; 46. Guide rail seat; 5. Side tensioning assembly; 51. Second tension sleeve; 52. Second tension shaft; 53. Third base; 54. Lead screw; 541. Drive end; 6. Slide; 7. Lifting lug; 8. Parts. Detailed Implementation
[0028] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.
[0029] like Figure 1 , Figure 2 As shown, the part clamping device provided in this embodiment includes a head tensioning assembly 1, a base 2, an adjusting support 3, a top tip assembly 4, a side tensioning assembly 5, a slide 6, and a lifting lug 7. The base 2 has a length direction X and a width direction Y.
[0030] like Figure 1 , Figure 3 As shown, the head tensioning assembly 1 includes a first tension sleeve 11, a first tension shaft 12, and a first base 13. The first base 13 is fixed to one end of the base 2 in the X direction by bolts. The first tension shaft 12 is mounted on the upper end of the first base 13 via the first tension sleeve 11.
[0031] like Figure 3As shown, the base 2 is provided with multiple adjustable supports 3 whose height is adjustable in the Z direction. These adjustable supports 3 are positioned between the head tensioning assembly 1 and the top assembly 4. Each adjustable support 3 includes a fourth base 31 placed on the base 2, a screw 32 threaded to the upper end of the fourth base 31, and a top block 33 connected to the top of the screw 32. By rotating the screw 32, the height of the top block 33 is adjusted so that its upper surface abuts against the lower surface of the part 8 to be processed (i.e., the workpiece). The upper surface of the top block 33 is a hemispherical or arc-shaped surface.
[0032] like Figure 1 , Figure 4 As shown, the tip assembly 4 includes a tip 41, a spring 42, a handle 43, a second base 44, a locking element 45, a guide rail seat 46, and a mounting base 47. The guide rail seat 46 is bolted to the base 2. The second base 44 is mounted on the guide rail seat 46 via the locking element 45. The locking element 45 can be a bolt or a locking element with a cam handle and an internal spring. When the handle is rotated, the spring is compressed or extended due to the change in the position of the cam, thereby pressing the second base 44 onto the guide rail seat 46, or contacting the pressing force, and then removing the locking element 45 from the second base 44 (the second base 44 has a U-shaped groove), thereby allowing the structure above the tip assembly 4 and guide rail seat 46 to be disassembled.
[0033] like Figure 4 As shown, the mounting base 47 is installed on the side of the second base 44 away from the head tensioning assembly 1. The tip 41 passes through the second base 44 and the mounting base 47, and one end of the tip 41 is connected to the handle 43, while the other end of the tip 41 is used to abut against the part 8 (e.g., Figure 2 (As shown). A spring 42 is fitted on the tip 41. The spring 42 is placed inside the mounting base 47 and abuts against the mounting base 47 and the tip 41 respectively. The end of the handle 43 near the mounting base 47 is provided with a cam 431 for pulling or pushing the tip 41 to compress or extend the spring 42.
[0034] like Figure 1 As shown, a slide block 6 is provided at each of the two ends of the base 2 in the Y direction, and the slide block 6 is positioned close to the top component 4 (e.g., Figure 2 (As shown).
[0035] like Figure 1 , Figure 5As shown, the side tensioning assembly 5 includes a second tension sleeve 51, a second tension shaft 52, a third base 53, and a lead screw 54. The lead screw 54 is rotatably mounted in the slide block 6. The two leads screws 54 extend to the outside of the slide block 6 on opposite sides to form a drive end 541. The drive end 541 is a square shaft portion, which facilitates the mounting of a wrench to drive the lead screw 54 to rotate. The lower end of the third base 53 is threadedly connected to the lead screw 54, and the third base 53 is slidably connected to the slide block 6 to convert the rotation of the lead screw 54 into the displacement of the third base 53. The upper end of the third base 53 is fitted with the second tension shaft 52 via the second tension sleeve 51. The two second tension shafts 52 are arranged close to each other. The axes of the tip 41, the first tension shaft 12, and the second tension shaft 52 coincide, and the height of this coincident axis from the base 2 is greater than 180mm.
[0036] By rotating the lead screw 54, the side tensioning assembly 5 is displaced in the Y direction. In this embodiment, the two side tensioning assemblies 5 are adjusted separately. Alternatively, the two side tensioning assemblies 5 can be connected to a single lead screw with opposite threads. Two third bases 53 are simultaneously threaded onto the lead screw. By rotating the lead screw, the two side tensioning assemblies 5 can be simultaneously moved closer to each other or further away from each other to clamp or release the part 8.
[0037] like Figure 1 , Figure 2 As shown, the base 2 is also provided with lugs 7 around its perimeter.
[0038] Before using the part clamping device, the blank part 8 needs to be machined to a reference. For example, a φ116mm precision hole is machined at the front spindle position of part 8, and a coaxial 60° machining center hole is machined at the tail end, controlling the coaxiality to within 0.05mm.
[0039] The method of using the part clamping device includes the following steps:
[0040] S1, machining part reference
[0041] like Figure 6 , Figure 7 As shown, the outer diameter of the chuck at the left end of part 8 is φ72h8mm, and a φ46mm center hole is machined in the center of the chuck, with a chamfer of 2×60°. The right end of part 8 undergoes deep hole roughing, with the hole opening bored to φ103H8mm within a 100mm length range, and the reference outer diameter turned to φ130h8mm.
[0042] The inner hole of the φ103H8mm part on the right end of the counter-bracing part 8 is tightened with the center, and the coaxiality of the center is aligned within 0.05mm. The two sides are machined, and the reference hole is bored to 2-φ46H8mm.
[0043] The left and right ends of part 8 are machined with reference outer circles (Φ130h8, Φ72h8) to facilitate accuracy verification after positioning and clamping. The Φ46 on the left end is used for center alignment during clamping. The Φ103H8 is used for tensioning part 8 with the expansion shaft. The upper and lower ends are machined with inner holes (2-Φ46H8) for tensioning part 8 with the expansion shaft, restricting rotation of part 8 during machining.
[0044] S2, Adjust the clamping device
[0045] Hoist part 8 into position and fit the φ103H8mm hole in part 8 onto the first expansion shaft 12. Adjust handle 43 so that the tip 41 abuts against the φ46mm tip hole. Then, adjust screw 54 to insert the second expansion shaft 52 on the side clamping assembly 5 into the φ46H8mm hole in part 8.
[0046] S3, Clamping Confirmation
[0047] To check if part 8 is properly clamped, use a dial indicator to check the runout and height difference between the outer diameter reference surfaces at both ends of part 8, and then use a feeler gauge to check the clearance between the part and the clamping device. If it does not meet the machining requirements, make adjustments. Finally, ensure that the spindle of part 8 coincides with the axis of the center 41, the first expansion shaft 12, and the second expansion shaft 52 (e.g., Figure 2 (As shown).
[0048] S4, manually adjust the adjustment support 3 so that it is supported on the lower surface of part 8.
[0049] S5, exit the top plate and begin processing.
[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A part clamping device, characterized in that, The device includes a base (2), a tip assembly (4) located at one end of the base (2) in the X direction, a head tensioning assembly (1) located at the other end of the base (2) in the X direction, and side tensioning assemblies (5) located at both ends of the base (2) in the Y direction. The tip assembly (4) is provided with a tip (41) that can extend or retract toward the head tensioning assembly (1). The two side tensioning assemblies (5) are displaced relative to each other or away from each other along a slide (6) provided on the base (2). The head tensioning assembly (1) is provided with a first tensioning shaft (12), and the side tensioning assembly (5) is provided with a second tensioning shaft (52). The axes of the tip (41), the first tensioning shaft (12), and the second tensioning shaft (52) coincide.
2. The part clamping device according to claim 1, characterized in that, The head tensioning assembly (1) further includes a first base (13) and a first tension sleeve (11) for mounting the first tension shaft (12) on the first base (13), the first base (13) being mounted on the base (2).
3. The part clamping device according to claim 1, characterized in that, The tip assembly (4) further includes a second base (44), a mounting base (47), a handle (43), and a spring (42). The mounting base (47) is mounted on the second base (44). The tip (41) passes through the second base (44) and the mounting base (47), and one end of the tip (41) is connected to the handle (43). The tip (41) is fitted with a spring (42), which is placed inside the mounting base (47) and abuts against the mounting base (47) and the tip (41) respectively. The end of the handle (43) near the mounting base (47) is provided with a cam (431) for pulling or pushing the tip (41) to compress or extend the spring (42).
4. The part clamping device according to claim 3, characterized in that, The mounting base (47) is located on the side away from the head tensioning assembly (1).
5. The part clamping device according to claim 1, characterized in that, The top component (4) also includes a second base (44), a locking element (45) and a guide rail (46). The guide rail (46) is mounted on the base (2), and the second base (44) is mounted on the guide rail (46) by the locking element (45). The top (41) is located on the second base (44).
6. The part clamping device according to claim 1, characterized in that, The side tensioning assembly (5) further includes a lead screw (54) rotatably disposed in the slide (6), a third base (53) threadedly connected to the lead screw (54) and slidably fitted to the slide (6), and a second expansion sleeve (51) for mounting the second expansion shaft (52) on the third base (53).
7. The part clamping device according to claim 6, characterized in that, The two lead screws (54) extend to the outside of the slide (6) on opposite sides to form a drive end (541).
8. The part clamping device according to claim 1, characterized in that, The base (2) is also provided with a plurality of height-adjustable supports (3) in the Z direction, and the plurality of the adjustable supports (3) are placed between the head tensioning component (1) and the top component (4).
9. The part clamping device according to claim 8, characterized in that, The adjusting support (3) includes a fourth base (31) placed on the base (2), a screw (32) threaded to the upper end of the fourth base (31), and a top block (33) connected to the top of the screw (32).
10. The part clamping device according to claim 1, characterized in that, The base (2) is also provided with lugs (7) around its perimeter.