CNC (Computer Numerical Control) positioning device with elastic propping and rigid locking functions
By introducing side wall stops and self-locking positioning mechanisms into the CNC positioning device, the assembly difficulties and clamping instability caused by the dimensions of hollow thin-wall workpieces in processing are solved, and stable clamping and high precision of the workpieces are achieved position.
Patent Information
- Application Number
- CN202420598179.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-26
AI Technical Summary
When existing CNC machines process hollow thin-walled workpieces, there are differences in workpiece sizes between prototyping positioning and side-push cylinder positioning methods, which lead to difficulty in assembly, easy to squeeze or scratch, and the lack of self-locking function leads to unstable clamping, reducing positioning. Accuracy.
An elastically resistant rigid locking CNC positioning device including a flange, a bracket, a side wall stop, an end face positioning mechanism and a self-locking positioning mechanism are designed, and the end face of the workpiece and the two The rotating cylinder, lifting cylinder and driving cylinder are used to achieve elastic clamping and limiting.
It realizes stable clamping of workpieces of different specifications, improves positioning accuracy and safety of workpieces, avoids extrusion and scratches, and ensures the stability of the processing process.
Smart Images
Figure CN222308057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tooling fixtures, in particular to a CNC positioning device with elastic resistance and rigid locking. Background Art
[0002] When CNC machines process workpieces, positioning devices are required to fix the workpieces and accurately position them. For hollow thin-walled workpieces, contour positioning and side-thrust cylinder positioning methods are generally used. However, contour positioning has strict requirements on the size of the workpiece to be processed. Slight differences in the size of the workpiece will cause assembly difficulties and easily squeeze or scratch the workpiece. When using side-thrust cylinders for positioning, due to the thin thickness of the workpiece, in order not to over-extrude the workpiece and to clamp and fix workpieces with different sizes, the cylinder generally clamps the workpiece elastically. Since this type of cylinder lacks a self-locking function, the clamping process of the workpiece is not stable, which reduces the positioning accuracy. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a CNC positioning device with elastic resistance and rigid locking.
[0004] The technical solution of the utility model is: a CNC positioning device with elastic resistance and rigid locking, comprising a flange and a bracket, wherein the flange is fixedly connected to a CNC machine tool through a fastener, the bracket is fixedly connected to the flange, and a chassis is arranged on the bracket. A side wall block is arranged on the chassis, an end face positioning mechanism is arranged on one side of the side wall block, and a self-locking positioning mechanism is arranged on the other side, and two sides of a workpiece are in contact with the side wall block and the self-locking positioning mechanism respectively.
[0005] Furthermore, the end face positioning mechanism includes a rotating cylinder and an end face positioning block, one end of the end face positioning block is fixedly connected to the output end of the rotating cylinder, and the other end is in contact with the end face of the workpiece, and the chassis is provided with an end face stopper corresponding to the other end face of the workpiece.
[0006] Furthermore, a cover plate is arranged above the chassis, a processing hole is arranged on the cover plate, a contoured surface matching the workpiece is arranged on the cover plate, and the cover plate is movably connected to the chassis.
[0007] Furthermore, the chassis is provided with a lifting cylinder, and the cover plate is fixedly connected to the telescopic end of the lifting cylinder by bolts.
[0008] Furthermore, the self-locking positioning mechanism includes a driving cylinder, a transverse movement mechanism and a vertical movement mechanism. The outer wall of the driving cylinder is respectively provided with a transverse movement air pipe and a vertical movement air pipe; the transverse movement air pipe is connected to the transverse movement mechanism, and the vertical movement air pipe is connected to the vertical movement mechanism.
[0009] Furthermore, the transverse movement mechanism includes a moving block, a slider, a transverse movement air cavity and a transverse movement piston; one end of the slider is fixedly connected to the moving block, and the other end is fixedly connected to the end surface of the transverse movement piston in the transverse movement air cavity through a connecting rod, and the transverse movement air pipe is connected to the transverse movement air cavity.
[0010] Furthermore, a rubber block is provided on the side of the moving block that contacts the workpiece.
[0011] Furthermore, the vertical movement mechanism includes a push rod, a vertical movement air cavity and a vertical movement piston; the bottom end of the push rod is fixedly connected to the top surface of the vertical movement piston in the vertical movement air cavity, the other end is provided with a slope, and the slider is provided with a U-shaped groove matching the slope; the vertical movement air pipe is connected to the vertical movement air cavity.
[0012] Compared with the prior art, the advantages of the utility model are: the end face and both sides of the workpiece are clamped and fixed through the action of the side wall stopper, the end face positioning mechanism and the self-locking positioning mechanism, so that the workpiece remains stable when clamped; the self-locking positioning mechanism applies an elastic clamping force to the slider, so that the moving block can stably clamp different workpieces with different sizes. At the same time, due to the locking effect of the self-locking positioning mechanism, the slider is limited, so that the workpiece is subjected to a stable clamping force during the clamping process and maintains a stable clamping state. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 It is an overall schematic diagram of the utility model;
[0015] Figure 2 It is an exploded view of the utility model and the cover plate;
[0016] Figure 3 This is a schematic diagram of the self-locking positioning mechanism of the utility model;
[0017] Figure 4 This is a cross-sectional schematic diagram of the self-locking positioning mechanism of the utility model;
[0018] Figure 5 for Figure 4 Enlarged view of point A in the middle.
[0019] Among them: 1. Flange; 2. End face positioning mechanism; 3. Self-locking positioning mechanism; 4. Chassis; 5. Cover plate; 6. Workpiece; 11. Bracket; 21. Rotating cylinder; 22. End face positioning block; 31. Driving cylinder; 32. Moving block; 33. Slider; 331. U-shaped groove; 34. Transverse air cavity; 341. Transverse piston; 342. Connecting rod; 35. Vertical air cavity; 351. Vertical piston; 352. Push rod; 311. Transverse air pipe; 312. Vertical air pipe; 321. Rubber block; 41. Side wall block; 42. End face block; 51. Bolt; 52. Lifting cylinder. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0021] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:
[0022] like Figures 1 to 5 As shown, a CNC positioning device with elastic resistance and rigid locking includes a flange 1 and a bracket 11. The flange 1 is fixedly connected to a CNC machine tool through fasteners, and the bracket 11 is fixedly connected to the flange. A chassis 4 is provided on the bracket 11. A side wall block 41 is provided on the chassis 4. An end face positioning mechanism 2 is provided on one side of the side wall block 41, and a self-locking positioning mechanism 3 is provided on the other side. Both sides of a workpiece 6 are in contact with the side wall block 41 and the self-locking positioning mechanism 3 respectively. The end face positioning mechanism 2 clamps and fixes the end face of the workpiece 6, and the side wall block 41 and the self-locking positioning mechanism 3 clamp and fix the two side faces of the workpiece 6. The self-locking positioning mechanism 3 elastically clamps the workpiece 6, which is suitable for clamping and fixing workpieces 6 of different specifications.
[0023] The end surface positioning mechanism 2 includes a rotary cylinder 21 and an end surface positioning block 22. One end of the end surface positioning block 22 is fixedly connected to the output end of the rotary cylinder 21, and the other end is in contact with the end surface of the workpiece 6. The chassis 4 is provided with an end surface stopper 42 corresponding to the other end surface of the workpiece 6. The rotary cylinder 21 is fixedly connected to the chassis 4. The rotary cylinder 21 is started to control the end surface positioning block 22 to rotate. The end surface positioning block 22 cooperates with the end surface stopper 42 to clamp the end surface of the workpiece 6.
[0024] A cover plate 5 is provided above the chassis 4, and a processing hole is provided on the cover plate 5, and a contoured surface matching the workpiece is provided on the cover plate 5. The chassis 4 is provided with a lifting cylinder 52, and the cover plate 5 is fixedly connected to the telescopic end of the lifting cylinder 52 by a bolt 51. When the upper surface of the workpiece 6 needs to be processed, the lifting cylinder 52 drives the cover plate 5 to move downward, and the contoured surface on the cover plate 5 fits with the surface of the workpiece 6, and the cover plate 5 clamps the workpiece 6 from above. At this time, the CNC machine tool drills and mills the surface of the workpiece 6 through the processing holes on the cover plate 5.
[0025] The self-locking positioning mechanism 3 includes a driving cylinder 31, a transverse movement mechanism and a vertical movement mechanism. The outer wall of the driving cylinder 31 is provided with a transverse movement air pipe 311 and a vertical movement air pipe 312 respectively. The transverse movement air pipe 311 is connected to the transverse movement mechanism, and the vertical movement air pipe 312 is connected to the vertical movement mechanism. The transverse movement mechanism includes a moving block 32, a slider 33, a transverse movement air cavity 34 and a transverse movement piston 341. One end of the slider 33 is fixedly connected to the moving block 32, and the other end is fixedly connected to the end surface of the transverse movement piston 341 in the transverse movement air cavity 34 through a connecting rod 342. The transverse movement air pipe 311 is connected to the transverse movement air cavity 34. The vertical movement mechanism includes a push rod 352, a vertical movement air cavity 35 and a vertical movement piston 351; the bottom end of the push rod 352 is fixedly connected to the top surface of the vertical movement piston 351 in the vertical movement air cavity 35, and the other end is provided with a slope, and the slider 33 is provided with a U-shaped groove 331 matching the slope; the vertical movement air pipe 312 is connected to the vertical movement air cavity 35. The transverse air pipe 311 and the vertical air pipe 312 both include an air inlet pipe and an air outlet pipe, and the movement of the transverse piston 341 and the vertical piston 351 is controlled by controlling the airflow in and out of the transverse air cavity 34 and the vertical air cavity 35, thereby controlling the extension and retraction of the moving block 32 and the push rod 352. A high-strength rubber block 321 is provided on the side of the moving block 32 that contacts the workpiece 6 to prevent scratches on the workpiece 6 during the clamping process.
[0026] The working principle of the specific implementation of the utility model is as follows: one side of the workpiece 6 is attached to the side wall block 41, the rotating cylinder 21 is started, and the end surface positioning block 22 cooperates with the end surface block 42 to clamp the end surface of the workpiece 6. The horizontal piston 341 drives the slider 33 to move, so that the moving block 32 elastically clamps the side of the workpiece 6; the vertical piston 351 drives the push rod 352 to move upward, and the slope on the push rod 352 cooperates with the U-shaped groove 331 on the slider 33 to limit the slider 33.
[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.
[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A CNC positioning device with elastic resistance and rigid locking, comprising a flange (1) and a bracket (11), wherein the flange (1) is fixedly connected to a CNC machine tool through a fastener, the bracket (11) is fixedly connected to the flange, and a chassis (4) is provided on the bracket (11), characterized in that: The chassis (4) is provided with a side wall stopper (41), one side of the side wall stopper (41) is provided with an end surface positioning mechanism (2), and the other side is provided with a self-locking positioning mechanism (3), and the two sides of the workpiece (6) are respectively in contact with the side wall stopper (41) and the self-locking positioning mechanism (3).
2. The CNC positioning device with elastic resistance and rigid locking according to claim 1, characterized in that: The end surface positioning mechanism (2) comprises a rotary cylinder (21) and an end surface positioning block (22), one end of the end surface positioning block (22) is fixedly connected to the output end of the rotary cylinder (21), and the other end is in contact with the end surface of the workpiece (6), and the chassis (4) is provided with an end surface stopper (42) corresponding to the other end surface of the workpiece (6).
3. The CNC positioning device with elastic resistance and rigid locking according to claim 1, characterized in that: A cover plate (5) is provided above the chassis (4), the cover plate (5) is provided with a processing hole, the cover plate (5) is provided with a contoured surface matching the workpiece (6), and the cover plate (5) is movably connected to the chassis (4).
4. The CNC positioning device with elastic resistance and rigid locking according to claim 3, characterized in that: The chassis (4) is provided with a lifting cylinder (52), and the cover plate (5) is fixedly connected to the telescopic end of the lifting cylinder (52) via bolts (51).
5. The CNC positioning device with elastic resistance and rigid locking according to claim 1, characterized in that: The self-locking positioning mechanism (3) comprises a driving cylinder (31), a transverse movement mechanism and a vertical movement mechanism, and the outer wall of the driving cylinder (31) is respectively provided with a transverse movement air pipe (311) and a vertical movement air pipe (312); the transverse movement air pipe (311) is connected to the transverse movement mechanism, and the vertical movement air pipe (312) is connected to the vertical movement mechanism.
6. The CNC positioning device with elastic resistance and rigid locking according to claim 5, characterized in that: The transverse movement mechanism comprises a moving block (32), a slider (33), a transverse movement air cavity (34) and a transverse movement piston (341); one end of the slider (33) is fixedly connected to the moving block (32), and the other end is fixedly connected to the end surface of the transverse movement piston (341) in the transverse movement air cavity (34) through a connecting rod (342); the transverse movement air pipe (311) is connected to the transverse movement air cavity (34).
7. The CNC positioning device with elastic resistance and rigid locking according to claim 6, characterized in that: A rubber block (321) is provided on a side of the moving block (32) that contacts the workpiece (6).
8. The CNC positioning device with elastic resistance and rigid locking according to claim 6, characterized in that: The vertical movement mechanism comprises a push rod (352), a vertical movement air chamber (35) and a vertical movement piston (351); the bottom end of the push rod (352) is fixedly connected to the top surface of the vertical movement piston (351) in the vertical movement air chamber (35), and the other end is provided with a slope, and the sliding block (33) is provided with a U-shaped groove (331) matching the slope; the vertical movement air pipe (312) is connected to the vertical movement air chamber (35).