Rotatable clamp for three-coordinate measuring machine and three-coordinate measuring machine

Abstract

The utility model provides a rotatable clamp for a three-coordinate measuring machine and the three-coordinate measuring machine, which can greatly improve the measuring efficiency, reduce the occupation of transverse space and improve the space utilization rate. The rotatable clamp comprises a fixed base, a rotating frame, a driving motor, a plurality of clamp units and a controller, the rotating frame comprises a frame body and a rotating shaft, and the frame body is rotatably installed on the fixed base through the rotating shaft; the driving motor drives the rotating frame to rotate; the multiple clamp units are arranged on the frame body and distributed around the rotating shaft in the circumferential direction, each clamp unit comprises a clamp mounting plate and a clamp, the clamp mounting plate is provided with a mounting face deviating from the side where the rotating shaft is located, and the clamps are mounted on the mounting faces; the controller controls the driving motor to start and stop. According to the utility model, multi-layer measurement is realized, the clamp does not need to be frequently disassembled to replace workpieces, the measurement of a plurality of workpieces can be completed through one-time clamping, the measurement efficiency is greatly improved, and the space of a measuring machine can be reasonably utilized.

Description

Technical Field

[0001] The utility model belongs to the field of measurement technology, and in particular relates to a rotatable fixture for a three-coordinate measuring machine and a three-coordinate measuring machine equipped with the rotatable fixture. Background Art

[0002] At present, the fixture designs in the measurement field are mostly single-layer fixtures and manually clamped and fastened. A single-layer fixture is a single fixture or multiple fixtures are set on the workbench of the measuring machine. Multiple fixtures are laid out flat on the workbench surface, or laid out flat on the same fixture base to form an overall multi-station fixture.

[0003] Setting up multiple fixtures can greatly improve the measurement efficiency compared to a single fixture. However, multiple fixtures arranged in a flat manner are respectively clamped with the workpieces to be measured. A large number of fixtures will occupy a large horizontal space on the measuring machine workbench, and it is also easy to cause occlusion and interference between them during measurement. Summary of the invention

[0004] The utility model provides a rotatable clamp for a three-coordinate measuring machine and the three-coordinate measuring machine, which can greatly improve the measuring efficiency, reduce the lateral space occupation and improve the space utilization rate.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the rotatable fixture for a three-coordinate measuring machine proposed in the utility model is a rotatable fixture for a three-coordinate measuring machine, comprising:

[0006] Fixed base;

[0007] A rotating frame, the rotating frame comprising a frame body and a rotating shaft, the frame body being rotatably mounted on the fixed base via the rotating shaft;

[0008] A driving motor, the driving motor is drivingly connected to the rotating shaft to drive the rotating frame to rotate;

[0009] A plurality of clamp units, the plurality of clamp units are arranged on the frame body and arranged along a circumference around the rotating shaft, the clamp units include a clamp mounting plate and a clamp, the clamp mounting plate has a mounting surface away from the side where the rotating shaft is located, and the clamp is mounted on the mounting surface;

[0010] A controller is used to control the start and stop of the drive motor.

[0011] The plurality of clamp units are evenly arranged along the circumference around the axis of the rotating shaft on the frame body.

[0012] The fixed base includes two brackets corresponding to the two ends of the rotating shaft, and the two ends of the rotating shaft are respectively rotatably matched with the two brackets; a first retractable stop member is provided on one end of the rotating shaft, and a stop matching member is provided on the corresponding bracket, and the first retractable stop member has a stop position extending to cooperate with the stop matching member to stop the rotation of the rotating shaft, and a reset position retracting to disengage from the stop matching member.

[0013] The frame body includes two impeller-shaped frames arranged symmetrically on the left and right, and the two ends of the rotating shaft are respectively connected to the centers of the two impeller-shaped frames. The impeller-shaped frames include a plurality of blades evenly distributed along the circumference, and the plurality of blades are arranged in a one-to-one correspondence with the plurality of clamp units. The two ends of the clamp mounting plate are respectively fixedly connected to two opposite blades.

[0014] Among the two opposite blades fixedly connected to the two ends of the clamp mounting plate, at least one of the blades is provided with a second retractable stopper, the retractable direction of the second retractable stopper is parallel to the axial direction of the rotating shaft, and the second retractable stopper abuts against the clamp mounting plate when in an extended state.

[0015] The number of the blades is 4.

[0016] Each of the clamp units has a plurality of clamps, and the clamps are pneumatic clamps, and the start and stop of the plurality of pneumatic clamps are controlled by the same air pressure button.

[0017] The number of the clamps of the plurality of clamp units is equal, and the clamps of two opposite clamp units are arranged one by one in alignment.

[0018] The utility model also provides a three-coordinate measuring machine, comprising an X-axis beam, a Y-axis guide rail, a Z-axis spindle and a workbench, and also comprising the above-mentioned rotatable fixture, wherein the rotatable fixture is arranged on the workbench.

[0019] Compared with the prior art, the utility model has the following advantages and positive effects:

[0020] The utility model is a rotatable fixture for a three-dimensional coordinate measuring machine, which comprises a fixed base, a rotating frame, a driving motor and a plurality of fixture units. The rotating frame is arranged on the fixed base and can rotate under the drive of the driving motor. The plurality of fixture units are arranged on the rotating frame and are arranged along a circle around the rotating axis of the rotating frame. When the rotating frame rotates, the plurality of fixture units are driven to rotate, thereby driving the fixtures of the fixture units to rotate. Each fixture can clamp a workpiece to be measured. The workpiece rotates to a measuring position or rotates away from the measuring position with the rotating frame, thereby realizing multi-layer measurement. There is no need to frequently disassemble the fixture to replace the workpiece. The measurement of a plurality of workpieces can be completed by clamping once, thereby greatly improving the measurement efficiency. Compared with the horizontally laid arrangement of a plurality of fixtures, the space of the measuring machine can be reasonably utilized, and the shielding or interference between adjacent workpieces during measurement can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a rotatable fixture used for a three-dimensional coordinate measuring machine in an embodiment of the utility model from one viewing angle;

[0023] Figure 2 for Figure 1 Left view of

[0024] Figure 3 It is a three-dimensional structural schematic diagram from another perspective of the rotatable fixture used for a three-dimensional coordinate measuring machine in an embodiment of the utility model.

[0025] Reference numerals:

[0026] 1. Rotatable clamp; 100. Fixed base; 110. Bottom plate; 120. Bracket; 130. Stop fitting; 200. Rotating frame; 210. Frame body; 211. Blades; 220. Rotating shaft; 230. First retractable stop member; 240. Second retractable stop member; 300. Driving motor; 400. Clamp unit; 410. Clamp mounting plate; 411. Mounting surface; 420. Clamp; 500. Belt transmission mechanism. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] In some embodiments of the present application, a three-dimensional coordinate measuring machine is proposed, including an X-axis beam, a Y-axis guide rail, a Z-axis spindle and a workbench, wherein the X-axis beam is arranged across the top of the workbench, the Y-axis guide rail is arranged on the workbench, the Z-axis spindle is arranged on the X-axis beam, and the probe is arranged at the end of the Z-axis spindle. The three-dimensional coordinate measuring machine of this embodiment also includes a rotatable fixture for clamping a workpiece to be measured, and the rotatable fixture is arranged on the workbench.

[0030] Reference Figures 1 to 3 In some embodiments of the present application, the rotatable clamp 1 includes a fixed base 100 , a rotating frame 200 , a driving motor 300 and a plurality of clamp units 400 .

[0031] The fixed base 100 is the foundation of the entire rotatable fixture 1 .

[0032] The rotating frame 200 includes a frame body 210 and a rotating shaft 220 . The frame body 210 is rotatably mounted on the fixed base 100 via the rotating shaft 220 , so that the rotating frame 200 is rotatably mounted on the fixed base 100 as a whole. The rotating shaft 220 is specifically a horizontal cylindrical shaft.

[0033] The driving motor 300 is connected to the rotating shaft 220 to drive the rotating frame 200 to rotate; specifically, the driving motor 300 is fixed on the fixed base 100, and the driving motor 300 is connected to the rotating shaft 220 through a belt mechanism.

[0034] A plurality of fixture units 400 are arranged on the frame body 210 and arranged along the circumference around the rotating shaft 220. Each fixture unit 400 includes a fixture mounting plate 410 and a fixture 420. The fixture mounting plate 410 has a mounting surface 411 that is away from the side where the rotating shaft 220 is located, and the fixture 420 is installed on the mounting surface 411. Specifically, the fixture mounting plate 410 is approximately rectangular, and its length direction is parallel to the axial direction of the rotating shaft 220. It has six rectangular side surfaces. Among the six rectangular side surfaces, one side surface is parallel to the axial direction of the rotating shaft 220 and away from the side where the rotating shaft 220 is located, that is, toward the outer side of the circumference where the plurality of fixture units 400 are located. This side surface is the mounting surface 411 of the fixture mounting plate 410. The fixture 420 is installed on this mounting surface 411 to facilitate workpiece clamping and measurement.

[0035] The controller is used to control the start and stop of the driving motor 300. When the controller controls the driving motor 300 to start, the driving motor 300 drives the rotating frame 200 to rotate, and then drives the workpiece on the fixture unit 400 to rotate to the measuring position; after the workpiece rotates to the measuring position, the controller controls the driving motor 300 to stop, and the rotating frame 200 drives the fixture unit 400 to stop rotating, and then the workpiece at the measuring position is measured.

[0036] Specifically, in order to avoid interference between the workpiece that has not been rotated to the measuring position and the measuring machine probe, any one of the fixture units 400 is selected to rotate to the highest position as the measuring position A, that is, Figure 2 The position circled by the dotted line frame A is the highest angle unit at this time, and the mounting surface 411 of the fixture mounting plate 410 is horizontally facing upward, so that the workpiece at the measuring position faces upward for easy measurement. Multiple fixture units 400 are rotated to the measuring position successively, so as to measure multiple workpieces successively.

[0037] In some embodiments of the present application, multiple clamp units 400 are evenly arranged along the circumference of the frame body 210 around the axis of the rotating shaft 220, so that the frame body 210 is evenly stressed and the rotation angle is easy to control, thereby simplifying the controller's control of the control motor.

[0038] The fixed base 100 includes a base plate 110 and two brackets 120 fixed on the base plate 110. The two brackets 120 are arranged corresponding to the two ends of the rotating shaft 220, and the two ends of the rotating shaft 220 are respectively rotatably matched with the two brackets 120; a first retractable stopper 230 is provided on one end of the rotating shaft 220, and a stop fitting 130 is provided on the bracket 120 corresponding to this end of the rotating shaft 220. The first retractable stopper 230 is retractable, and has a stop position extending to cooperate with the stop fitting 130 to stop the rotation of the rotating shaft 220, and a reset position retracting to disengage from the stop fitting 130. In the reset position, the first retractable stopper 230 and the stop fitting 130 do not play a stopping role, and the driving motor 300 can drive the rotating shaft 220 to rotate normally.

[0039] Specifically, when any of the clamp units 400 rotates to the measuring position with the rotating frame 200, the driving motor 300 stops, the rotating frame 200 stops rotating, the first retractable stopper 230 extends to the stop position, cooperates with the stopper fitting 130 to limit the rotation of the rotating shaft 220, and further locates the position of the rotating frame 200, so that the clamp unit 400 at the measuring position is firmly maintained at the measuring position, and the clamp 420 is prevented from shaking, which is conducive to improving the measurement accuracy. After the workpiece at the measuring position is measured, the first retractable stopper 230 retracts and disengages from the stopper fitting 130, the rotating shaft 220 resumes the rotatable state, the driving motor 300 works, the rotating frame 200 rotates, the next clamp unit 400 rotates to the measuring position, and the first retractable stopper 230 extends again to stop, and so on.

[0040] The first retractable stopper 230 may specifically be a hydraulic stopper or a pneumatic stopper, and the stopper matching member 130 may be a stopper block fixed on the bracket 120 .

[0041] For the frame body 210, as Figure 1 and Figure 3 As shown, it includes two impeller-shaped frames arranged symmetrically on the left and right, the two ends of the rotating shaft 220 are respectively connected to the centers of the two impeller-shaped frames, the impeller-shaped frames include a plurality of blades 211 evenly distributed along the circumference, the plurality of blades 211 are arranged one-to-one with the plurality of clamp units 400, and the two ends of the clamp mounting plate 410 are respectively fixedly connected to the two opposite blades 211. The frame body 210 of this structural form has a simple structure and occupies a small space, and can provide sufficient space for the installation of the clamp unit 400.

[0042] The number of blades 211 is 4, 6 or other even numbers, so that the rotating frame 200 is subjected to force as evenly as possible.

[0043] Also, in order to improve the stability of the clamp unit 400 in the measuring position, at least one of the two opposite blades 211 fixedly connected to the two ends of the clamp mounting plate 410 is provided with a second retractable stopper 240, and the retractable direction of the second retractable stopper 240 is parallel to the axial direction of the rotating shaft 220, and the second retractable stopper 240 is in an extended state and rests on the clamp mounting plate 410.

[0044] When any of the clamp units 400 rotates to the measuring position along with the rotating frame 200, the driving motor 300 stops and the rotating frame 200 stops rotating. In addition to the first retractable stop member 230 extending to the stop position and cooperating with the stop mating member 130 to limit the rotation of the rotating shaft 220, the second retractable stop member 240 corresponding to the clamp unit 400 in the measuring position also extends out and rests on its clamp mounting plate 410, further improving the stability of the clamp unit 400 in the measuring position.

[0045] In some embodiments of the present application, each fixture unit 400 has multiple fixtures 420, so that each fixture unit 400 can clamp multiple workpieces, and multiple workpieces can reach the measurement position at the same time, further improving the measurement efficiency.

[0046] In some embodiments of the present application, the clamp 420 is a pneumatic clamp, and the start and stop of multiple pneumatic clamps are controlled by the same air pressure button. Specifically, the air circuits of multiple pneumatic clamps are connected in parallel on the same main air circuit, and the air pressure button is arranged on the main air circuit, and the air inlet or air outlet of the main air circuit is controlled to control the air inlet or air outlet of multiple pneumatic clamps, thereby controlling the clamping or loosening of the pneumatic clamps.

[0047] The clamp 420 uses a pneumatic clamp, which can realize automatic clamping, improve clamping efficiency, and further improve measurement efficiency.

[0048] In some embodiments of the present application, the number of clamps in the plurality of clamp units 400 is equal, and the clamps 420 of two opposite clamp units 400 are arranged in alignment with each other. Figure 1 and Figure 3 As shown, each fixture unit 400 includes four fixtures 420, and the four fixtures 420 are distributed in a rectangular array.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A rotatable fixture for a three-dimensional coordinate measuring machine, characterized in that: include: Fixed base; A rotating frame, the rotating frame comprising a frame body and a rotating shaft, the frame body being rotatably mounted on the fixed base via the rotating shaft; A driving motor, the driving motor is drivingly connected to the rotating shaft to drive the rotating frame to rotate; A plurality of clamp units, the plurality of clamp units are arranged on the frame body and arranged along a circumference around the rotating shaft, the clamp units include a clamp mounting plate and a clamp, the clamp mounting plate has a mounting surface away from the side where the rotating shaft is located, and the clamp is mounted on the mounting surface; A controller is used to control the start and stop of the drive motor.

2. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The plurality of clamp units are evenly arranged along the circumference around the axis of the rotating shaft on the frame body.

3. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 2, characterized in that: The fixed base includes two brackets corresponding to the two ends of the rotating shaft, and the two ends of the rotating shaft are respectively rotatably matched with the two brackets; a first retractable stop member is provided on one end of the rotating shaft, and a stop matching member is provided on the corresponding bracket, and the first retractable stop member has a stop position extending to cooperate with the stop matching member to stop the rotation of the rotating shaft, and a reset position retracting to disengage from the stop matching member.

4. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 2, characterized in that: The frame body includes two impeller-shaped frames arranged symmetrically on the left and right, and the two ends of the rotating shaft are respectively connected to the centers of the two impeller-shaped frames. The impeller-shaped frames include a plurality of blades evenly distributed along the circumference, and the plurality of blades are arranged in a one-to-one correspondence with the plurality of clamp units. The two ends of the clamp mounting plate are respectively fixedly connected to two opposite blades.

5. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 4, characterized in that: Among the two opposite blades fixedly connected to the two ends of the clamp mounting plate, at least one of the blades is provided with a second retractable stopper, the retractable direction of the second retractable stopper is parallel to the axial direction of the rotating shaft, and the second retractable stopper abuts against the clamp mounting plate when in an extended state.

6. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 4, characterized in that: The number of the blades is 4.

7. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: Each of the clamp units has a plurality of clamps, and the clamps are pneumatic clamps, and the start and stop of the plurality of pneumatic clamps are controlled by the same air pressure button.

8. The rotatable fixture for a three-dimensional coordinate measuring machine according to claim 4, characterized in that: The number of the clamps of the plurality of clamp units is equal, and the clamps of two opposite clamp units are arranged one by one in alignment.

9. A three-dimensional coordinate measuring machine, comprising an X-axis beam, a Y-axis guide rail, a Z-axis spindle and a worktable, characterized in that: Also includes: The rotatable fixture for a three-dimensional coordinate measuring machine according to any one of claims 1 to 8, wherein the rotatable fixture is arranged on the workbench.

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