Workpiece clamp structure of numerical control machine tool
By designing detachable clamps and positioning members in the workpiece fixtures of CNC machine tools, the problem of difficulty in clamping non-planar workpieces is solved in traditional clamps, and efficient clamping and precision machining of complex workpieces is achieved.
Patent Information
- Application Number
- CN202421787068.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Traditional fixtures of existing CNC machine tools are difficult to effectively clamp non-planar workpieces, such as circular shafts or arc-surface workpieces, resulting in reduced machining accuracy.
A workpiece clamp structure including a base, a movable jaw and a fixed jaw is designed. By setting a detachable clamp block in the movable jaw, the clamp blocks are distributed along the circumference with different clamp areas. When installing the positioning member and the slider, different clamp areas can be selected to correspond to the fixed jaws to adapt to the clamping surfaces of different workpieces.
This design effectively increases the applicability of the fixture, can adapt to the clamping surfaces of different workpieces, improves machining accuracy, and meets the clamping needs of complex workpieces.
Smart Images
Figure CN223012527U_ABST
Abstract
Description
Technical Field
[0001] The utility model particularly relates to a workpiece fixture structure of a numerical control machine tool. Background Art
[0002] A CNC numerical control machine tool is an automated machine tool equipped with a program control system. Through computer control, the machine tool can operate and process parts, improving the precision of workpiece processing. It can perform multi-axis linkage and process parts with complex shapes.
[0003] During the processing of a numerical control machine tool, the workpiece needs to be limited to prevent the reduction of processing accuracy due to workpiece offset. In the prior art, traditional machine tool fixtures are relatively simple. The workpiece is clamped by a vise. However, the traditional vise clamps and fixes the workpiece through two opposite flat surfaces. The above only applies to workpieces with flat clamping surfaces. Once used for clamping round shaft workpieces or workpieces with arc surfaces, offset will still occur, affecting the processing accuracy, and thus cannot meet the usage requirements. Summary of the Utility Model
[0004] Aiming at the defects existing in the above prior art, the technical problem to be solved by the utility model is to provide a workpiece fixture structure of a numerical control machine tool.
[0005] A workpiece fixture structure of a numerical control machine tool includes a base, a movable jaw and a fixed jaw respectively arranged on the base. The movable jaw and the fixed jaw are arranged oppositely and form a workpiece clamping space. A driving member capable of driving the movable jaw to move closer to or away from the fixed jaw is arranged on the base. The movable jaw includes a slider and a clamping block. The clamping block is detachably embedded on the slider, and the relative rotation angle between the clamping block and the slider can be fixed and changed through a positioning member. A plurality of clamping areas are circumferentially and evenly distributed along the clamping block. The plurality of clamping areas can rotate relative to the slider along with the clamping block and respectively protrude from one side of the slider.
[0006] In an embodiment, the positioning member includes a central hole arranged on the clamping block, a fixed shaft arranged on the slider and capable of cooperating with the central hole, a plurality of positioning holes arranged on the clamping block at circumferential intervals with the central hole as the center, and a positioning shaft arranged on the slider and capable of cooperating with the positioning holes.
[0007] In an embodiment, the positioning member further includes a plurality of convex teeth circumferentially and evenly distributed along the fixed shaft, and a plurality of clamping grooves are concavely arranged on the inner side wall of the central hole at circumferential intervals and capable of meshing with the convex teeth.
[0008] In an embodiment, an expansion rod capable of elastically expanding and contracting relative to the slider is arranged on one side of the slider, and the expansion rod can elastically expand and contract and abut against the upper side of the clamping block.
[0009] In one embodiment, several clamping areas include a flat surface and arc surfaces with multiple different diameters.
[0010] In one embodiment, the driving member includes a lead screw rotatably arranged on the base and a guide groove arranged on the base. The length direction of the guide groove is the same as that of the lead screw. The slider is movably arranged in the guide groove and is threadedly connected with the lead screw.
[0011] In one embodiment, mounting slots are respectively arranged on both sides of the base.
[0012] In summary, the beneficial effects of the present utility model compared with the prior art are as follows:
[0013] By adding a detachable clamping block in the movable jaw of the present utility model, and different clamping areas are evenly distributed along the circumference of the clamping block. When the clamping block is installed with the slider through the positioning member, different clamping areas can be selectively arranged opposite to the fixed jaw, so as to adapt to the clamping and fixing of different workpiece clamping surfaces through different clamping areas, thereby effectively increasing the applicability of the overall fixture. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a three-dimensional structure schematic diagram of a workpiece fixture structure of a numerical control machine tool in an embodiment of the present utility model;
[0015] Figure 2 is an exploded schematic diagram of a workpiece fixture structure of a numerical control machine tool in an embodiment of the present utility model;
[0016] Figure 3 is a sectional structure schematic diagram of a workpiece fixture structure of a numerical control machine tool in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The present utility model will be further described below in conjunction with the drawings and specific embodiments:
[0018] As Figures 1 to 3 shown, the embodiment of the present utility model preferably provides a workpiece fixture structure of a numerical control machine tool, including a base 1, a movable jaw 2 and a fixed jaw 3 respectively arranged on the base 1. The movable jaw 2 and the fixed jaw 3 are arranged opposite to each other to form a workpiece clamping space. A driving member 4 capable of driving the movable jaw 2 to move closer to or away from the fixed jaw 3 is arranged on the base 1. The movable jaw 2 includes a slider 21 and a clamping block 22. The clamping block 22 is detachably embedded on the slider 21, and the relative rotation angle between the clamping block 22 and the slider 21 can be fixed and changed through a positioning member 5. A plurality of clamping areas 6 are evenly arranged at intervals along the circumference of the clamping block 22. The plurality of clamping areas 6 can rotate relative to the slider 21 with the clamping block 22 and respectively protrude out of one side of the slider 21.
[0019] Specifically, by adding a detachable clamping block to the movable jaw, and different clamping areas are evenly distributed along the circumference of the clamping block. When the clamping block is installed with the slider through the positioning member, different clamping areas can be selectively arranged opposite to the fixed jaw, so as to adapt to the clamping and fixing of different workpiece clamping surfaces through different clamping areas, thereby effectively increasing the applicability of the overall fixture.
[0020] Furthermore, the positioning member 5 includes a central hole 51 provided on the clamping block 22, and a fixed shaft 52 capable of cooperating with the central hole 51 is provided on the slider 21. The clamping block 22 is provided with a plurality of positioning holes 53 evenly spaced along the circumference with the central hole 51 as the center, and a positioning shaft 54 capable of cooperating with the positioning holes 53 is provided on the slider 21. Specifically, through the insertion fit of the central hole of the clamping block and the fixed shaft of the slider, and the insertion fit of the positioning hole of the clamping block and the positioning shaft of the slider, the positioning installation between the clamping block and the slider is realized, and the relative rotation angle adjustment and fixation of the clamping block relative to the slider are realized through different positioning holes on the clamping block and the positioning shafts on the slider respectively.
[0021] Furthermore, the positioning member 5 further includes a plurality of convex teeth 55 evenly distributed along the circumference of the fixed shaft 52, and a plurality of card slots 56 capable of meshing with the convex teeth 55 are concavely arranged along the circumference on the inner side wall of the central hole 51. Specifically, through the one-to-one meshing of the plurality of convex teeth of the fixed shaft and the plurality of card slots of the central hole, the structural firmness between the clamping block and the slider is effectively enhanced, and the anti-deflection structure between the clamping block and the slider is prevented from concentrating on the positioning shaft.
[0022] Furthermore, a telescopic rod 7 capable of elastically telescoping relative to it is provided on one side of the slider 21, and the telescopic rod 7 can telescopically abut against the upper side of the clamping block 22. Specifically, the elastic telescopic rod is a relatively mature existing technology, and its structural principle will not be elaborated in detail here. Its elastic guiding and limiting can be realized through the abutment of the spring and the guiding of the guiding hole. Furthermore, by the telescopic rod abutting against the upper side of the clamping block, the installation fit between the clamping block and the slider is maintained. When it is necessary to disassemble and replace the clamping block or reverse the installation of the clamping block, the user only needs to press the telescopic rod to make it contract and disengage from the clamping block.
[0023] Furthermore, several clamping areas 6 include a plane 61 and a plurality of arc surfaces 62 with different diameters. Furthermore, the plane is used to meet the clamping requirements of the workpiece clamping surface being a plane, and the arc surfaces with different diameters are used to meet the clamping requirements of different diameter circular shafts or workpiece clamping surfaces being arc surfaces.
[0024] Furthermore, the driving member 4 includes a lead screw 41 rotatably arranged on the base 1 and a guide groove 42 arranged on the base 1. The length direction of the guide groove 42 is arranged in the same direction as the length direction of the lead screw 41. The slider 21 is movably arranged in the guide groove 42 and is threadedly connected to the lead screw 41. Specifically, by screwing the lead screw, the slider is driven to move axially along the guide groove.
[0025] Furthermore, mounting slots 9 are respectively arranged on both sides of the base 1, so that it can be fixedly mounted on the workbench of the numerical control machine tool through bolts and nuts.
[0026] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A workpiece clamp structure for a numerically controlled machine tool, comprising a base (1) and a movable jaw (2) and a fixed jaw (3) respectively arranged on the base (1), wherein the movable jaw (2) and the fixed jaw (3) are arranged opposite to each other and form a workpiece clamping space, and a driving member (4) capable of driving the movable jaw (2) to move toward or away from the fixed jaw (3) is arranged on the base (1), characterized in that: The movable jaw (2) comprises a slider (21) and a clamping block (22); the clamping block (22) is detachably mounted on the slider (21); and a relative rotation angle between the clamping block (22) and the slider (21) can be fixed and changed by a positioning member (5); the clamping block (22) is provided with a plurality of clamping areas (6) spaced evenly along the circumference; the plurality of clamping areas (6) can rotate with the clamping block (22) relative to the slider (21) and are respectively protruding outwardly from one side of the slider (21).
2. The workpiece fixture structure of a CNC machine tool according to claim 1, characterized in that: The positioning member (5) comprises a center hole (51) arranged on the clamping block (22); the sliding block (21) is provided with a fixed shaft (52) capable of cooperating with the center hole (51); the clamping block (22) is provided with a plurality of positioning holes (53) uniformly spaced along the circumference with the center hole (51) as the center; and the sliding block (21) is provided with a positioning shaft (54) capable of cooperating with the positioning hole (53).
3. The workpiece fixture structure of a CNC machine tool according to claim 2, characterized in that: The positioning member (5) further comprises a plurality of convex teeth (55) uniformly arranged along the circumference of the fixed shaft (52), and the inner side wall of the central hole (51) is uniformly concave with a plurality of slots (56) that can mesh with the convex teeth (55) along the circumference.
4. The workpiece fixture structure of a CNC machine tool according to claim 1, characterized in that: A telescopic rod (7) capable of elastically telescoping relative to the slider (21) is disposed on one side of the slider (21), and the telescopic rod (7) can telescopically contact the upper side of the clamping block (22).
5. The workpiece fixture structure of a CNC machine tool according to claim 1, characterized in that: The clamping areas (6) include a plane (61) and a plurality of arc surfaces (62) with different diameters.
6. The workpiece fixture structure of a CNC machine tool according to claim 1, characterized in that: The driving member (4) comprises a screw rod (41) rotatably arranged on the base (1), and a guide groove (42) arranged on the base (1); the length direction of the guide groove (42) is arranged in the same direction as the length direction of the screw rod (41); and the slider (21) is movably arranged in the guide groove (42) and is threadedly connected to the screw rod (41).
7. The workpiece fixture structure of a CNC machine tool according to claim 1, characterized in that: The base (1) is provided with mounting slot holes (9) on both sides.