Plane self-adaptive machining clamp based on double-shaft rotation

Abstract

The utility model discloses a plane self-adaptation processing fixture based on biaxial rotation, including workbench, base, adjusting portion, biaxial rotation mechanism, and clamping subassembly that is composed of a plurality of support portion and fixture, the base is provided the workbench bottom, the adjusting portion is installed the workbench bottom, the biaxial rotation mechanism is installed on the workbench, the support portion is installed on the workbench bottom, the fixture is installed on the biaxial rotation mechanism, and the support portion is installed on the workbench bottom. The double-shaft rotating mechanism comprises a horizontal rotating shaft and a vertical rotating shaft, and the horizontal rotating shaft and the vertical rotating shaft respectively drive the workpiece table to carry out multi-degree-of-freedom pose adjustment. Through the design of the double-shaft rotating mechanism, multi-cylinder linkage adjustment and the elastic supporting part, efficient self-adaptive clamping of a workpiece is achieved, and the precision and efficiency of numerical control machining are remarkably improved; double-shaft rotation and multi-cylinder linkage can adapt to plane, curved surface and special-shaped workpieces; the pressure sensor feeds back the clamping force in real time, and the error is controlled within + / -0.01 mm; compared with a traditional clamp, clamping time is saved by more than 50% through full-automatic adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of CNC machining technology, specifically relating to a planar adaptive machining fixture based on dual-axis rotation. Background Technology

[0002] Traditional CNC machining fixtures mostly use a rigid fixing method, which has the following drawbacks:

[0003] Poor adaptability: For irregular planar or curved workpieces, frequent fixture changes or manual adjustments are required, resulting in low efficiency.

[0004] Insufficient positioning accuracy: A single clamping point can easily cause workpiece displacement, and vibration during processing can easily cause displacement errors.

[0005] Complex adjustment: Existing adjustment mechanisms rely on a single drive source, and multi-directional adjustment requires step-by-step operation, making synchronous control difficult.

[0006] Low stability: Existing pneumatic clamps are affected by air pressure fluctuations in clamping force, resulting in insufficient clamping reliability.

[0007] This invention effectively solves the above problems by using a dual-axis rotation mechanism and multi-cylinder coordinated adjustment technology, combined with an elastic support part and an adaptive contact part, to achieve efficient, precise and stable workpiece clamping. Utility Model Content

[0008] In view of the problems mentioned in the background technology above, the purpose of this utility model is to provide a planar adaptive machining fixture based on dual-axis rotation. Through the dual-axis rotation mechanism and multi-cylinder linkage adjustment technology, it can achieve high-precision positioning and adaptive clamping of workpieces, which is suitable for CNC machining scenarios of complex-shaped workpieces.

[0009] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0010] The planar adaptive machining fixture based on dual-axis rotation includes a worktable, a base, an adjustment unit, a dual-axis rotation mechanism, and a clamping assembly composed of multiple support units and fixtures. The base is disposed at the bottom of the worktable, the adjustment unit is installed at the bottom of the worktable, and the dual-axis rotation mechanism is installed on the worktable. The dual-axis rotation mechanism includes a horizontal rotation axis and a vertical rotation axis, which respectively drive the workpiece stage to perform multi-degree-of-freedom pose adjustment.

[0011] Further specifying, the adjustment unit includes a first cylinder, a second cylinder, and a third cylinder, all of which are mounted on the worktable in a triangular arrangement. The tilt angle and height of the worktable are adjusted through independent stroke control.

[0012] Further defined, the support portion includes a first support portion and a second support portion, which are disposed opposite to each other on the worktable.

[0013] Further, it also includes a first workpiece contact portion and a second workpiece contact portion, which are disposed opposite to each other on the worktable. The first support portion and the second support portion are respectively connected to the first workpiece contact portion and the second workpiece contact portion via elastic hinges. The surfaces of the first workpiece contact portion and the second workpiece contact portion are provided with anti-slip textures and pressure sensors.

[0014] Further specifying, the clamp includes a first clamp, a second clamp, and a third clamp, with the second support portion linked to the first, second, and third clamps. This structural design allows for dynamic balance of clamping force through cylinder drive.

[0015] Further specifying, it also includes a servo motor and a worm gear mechanism, wherein the horizontal rotation axis is connected to the servo motor and driven by the servo motor, and the vertical rotation axis is connected to the worm gear mechanism, wherein the vertical rotation axis achieves self-locking through the worm gear mechanism.

[0016] Further, it also includes a control system, which integrates a PLC and a touch screen. The control system receives pressure sensor signals in real time and provides feedback on the cylinder stroke and the angle of the horizontal rotation axis of the adjustment unit.

[0017] Furthermore, the base is equipped with shock-absorbing pads and a quick-installation interface at its bottom. This structural design allows it to be adapted to various CNC machine tool platforms.

[0018] The beneficial effects of this utility model are:

[0019] 1. High adaptability: Dual-axis rotation and multi-cylinder linkage can be adapted to flat, curved and irregularly shaped workpieces.

[0020] 2. Improved accuracy: The pressure sensor provides real-time feedback on the clamping force, with the error controlled within ±0.01mm.

[0021] 3. Efficiency optimization: Fully automatic adjustment saves more than 50% of clamping time compared to traditional clamps.

[0022] 4. Enhanced stability: The elastic support and shock-absorbing base effectively absorb processing vibrations. Attached Figure Description

[0023] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0024] Figure 1 This is a top view of an embodiment of the planar adaptive machining fixture based on dual-axis rotation of this utility model;

[0025] Figure 2 This is a bottom view of an embodiment of the planar adaptive machining fixture based on dual-axis rotation of this utility model.

[0026] The symbols of the main components are explained as follows: First cylinder 1, Second cylinder 2, Third cylinder 3, Worktable 4, Workpiece table 5, First workpiece contact part 6, Second workpiece contact part 7, First support part 8, Adjustment part 9, Second support part 10, First clamp 11, Second clamp 12, Third clamp 13, Dual-axis rotation mechanism 14, Base 15, Horizontal rotation axis 16, Vertical rotation axis 17. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1As shown, the planar adaptive machining fixture based on dual-axis rotation of this utility model is further defined as follows: the adjustment unit 9 includes a first cylinder 1, a second cylinder 2 and a third cylinder 3. The first cylinder 1, the second cylinder 2 and the third cylinder 3 are all set on the worktable 4 and are arranged in a triangular distribution. The tilt angle and height of the workpiece table 5 are adjusted by independent stroke control.

[0031] In the practical application of this embodiment, the support part includes a first support part 8 and a second support part 10, which are disposed opposite to each other on the workbench 4.

[0032] In the practical application of this embodiment, a first workpiece contact portion 6 and a second workpiece contact portion 7 are also included. The first workpiece contact portion 6 and the second workpiece contact portion 7 are disposed opposite to each other on the worktable 4. The first support portion 8 and the second support portion 10 are respectively connected to the first workpiece contact portion 6 and the second workpiece contact portion 7 through elastic hinges. The surfaces of the first workpiece contact portion 6 and the second workpiece contact portion 7 are provided with anti-slip textures and pressure sensors.

[0033] In the practical application of this embodiment, the clamp includes a first clamp 11, a second clamp 12, and a third clamp 13, and the second support 10 is linked with the first clamp 11, the second clamp 12, and the third clamp 13. This structural design can achieve dynamic balance of clamping force through cylinder drive.

[0034] In the practical application of this embodiment, a servo motor and a worm gear mechanism are also included. The horizontal rotation shaft 16 is connected to the servo motor and is driven by the servo motor. The vertical rotation shaft 17 is connected to the worm gear mechanism and is self-locked through the worm gear mechanism.

[0035] In the practical application of this embodiment, a control system is also included. The control system integrates a PLC and a touch screen. The control system receives pressure sensor signals in real time and provides feedback to adjust the cylinder stroke of the adjustment unit 9 and the angle of the horizontal rotation axis 16.

[0036] In the practical application of this embodiment, the base 15 is equipped with shock-absorbing pads and a quick-installation interface at its bottom. This structural design can be adapted to various CNC machine tool platforms.

[0037] The working principle of this utility model is as follows:

[0038] Adjustment unit 9: includes first cylinder 1, second cylinder 2 and third cylinder 3, which adjust the spatial position of workpiece stage 5 through the three-point support principle;

[0039] Dual-axis rotation mechanism 14: The horizontal rotation axis 16 enables the workpiece to rotate 360°, and the vertical rotation axis 17 provides ±30° tilt adjustment to ensure multi-angle processing requirements.

[0040] Clamping assembly: The first support part 8 and the second support part 10 are respectively connected to the elastic first workpiece contact part 6 and the second workpiece contact part 7, and together with the first clamp 11, the second clamp 12 and the third clamp 13, they form a multi-point dynamic clamping.

[0041] Control system: Processing parameters are set via touch screen, and the PLC automatically calculates the cylinder stroke and rotation angle to achieve one-button adaptive adjustment.

[0042] Example 1: Machining of a planar workpiece

[0043] Place the workpiece on the workpiece table 5, start the control system and select "planar mode". The third cylinder 3 pushes the workpiece table 5 to a horizontal position. The first clamp 11 and the second support 10 tighten synchronously. After the pressure of the first workpiece contact part 6 and the second workpiece contact part 7 is balanced, they lock. The dual-axis rotation mechanism adjusts the machining angle according to the preset program and starts milling.

[0044] Example 2: Machining of curved surface workpieces

[0045] When the surface curvature parameters are input on the touch screen, the system automatically generates adjustment commands. The second cylinder 2 and the third cylinder 3 work together to tilt the workpiece stage 5 to the target angle. The elastic hinges of the first support part 8 and the second support part 10 adapt to the surface contour. The third fixture 13 applies dynamic clamping force to ensure processing stability.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A planar self-adapting machining fixture based on dual-axis rotation, characterized in that: It includes a workbench (4), a base (15), an adjusting part (9), a double-shaft rotating mechanism (14), and a clamping assembly composed of a plurality of supporting parts and clamps, the base (15) is arranged at the bottom of the workbench (4), the adjusting part (9) is installed at the bottom of the workbench (4), the double-shaft rotating mechanism (14) is installed on the workbench (4), and the double-shaft rotating mechanism (14) includes a horizontal rotating shaft (16) and a vertical rotating shaft (17), the horizontal rotating shaft (16) and the vertical rotating shaft (17) drive the workpiece table (5) to perform multi-degree-of-freedom pose adjustment, respectively.

2. The dual-axis rotation based planar self-adapting machining fixture according to claim 1, wherein: The adjusting part (9) includes a first cylinder (1), a second cylinder (2) and a third cylinder (3), the first cylinder (1), the second cylinder (2) and the third cylinder (3) are arranged on the workbench (4), and the three are in a triangular distribution, and the inclination angle and the height of the workpiece table (5) are adjusted by independent stroke control.

3. The dual-axis rotation based planar self-adapting machining fixture according to claim 1, wherein: The supporting part includes a first supporting part (8) and a second supporting part (10), and the first supporting part (8) and the second supporting part (10) are arranged on the workbench (4) in opposition.

4. The dual-axis rotation based planar self-adapting machining fixture according to claim 3, wherein: It also includes a first workpiece contact part (6) and a second workpiece contact part (7), the first workpiece contact part (6) and the second workpiece contact part (7) are arranged on the workbench (4) in opposition, the first supporting part (8) and the second supporting part (10) are connected with the first workpiece contact part (6) and the second workpiece contact part (7) through elastic hinges respectively, and the surfaces of the first workpiece contact part (6) and the second workpiece contact part (7) are provided with anti-skid lines and pressure sensors.

5. The dual-axis rotation based planar self-adapting machining fixture according to claim 3, wherein: The clamp includes a first clamp (11), a second clamp (12) and a third clamp (13), the second supporting part (10) is linked with the first clamp (11), the second clamp (12) and the third clamp (13).

6. The dual-axis rotation based planar self-adapting machining fixture according to claim 1, wherein: It also includes a servo motor and a worm and gear mechanism, the horizontal rotating shaft (16) is connected with the servo motor, the horizontal rotating shaft (16) is driven by the servo motor, the vertical rotating shaft (17) is connected with the worm and gear mechanism, and the vertical rotating shaft (17) is self-locked through the worm and gear mechanism.

7. The dual-axis rotation based planar self-adapting machining fixture according to claim 4, wherein: It also includes a control system, the control system integrates PLC and a touch screen, the control system receives pressure sensor signals in real time and feeds back the cylinder stroke of the adjusting part (9) and the angle of the horizontal rotating shaft (16).

8. The dual-axis rotation based planar self-adapting machining fixture according to claim 1, wherein: The bottom of the base (15) is provided with a shock pad and a quick mounting interface.

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