Clamping device and calibration system of standard appliance

Abstract

The utility model discloses a clamping device and a calibration system for a standard appliance. The clamping device comprises a base, at least one length standard rod clamping part and at least one circumference standard rod clamping part, wherein the length standard rod clamping part and the circumference standard rod clamping part are positioned on the base; and a plurality of connecting holes connected with a three-coordinate measuring machine are symmetrically formed in the base. The base is positioned on the three-coordinate measuring machine through the connecting holes, the length standard rod clamping part and the circumference standard rod clamping part are arranged on the base, verification / calibration is carried out under the condition that a length standard rod and a circumference standard rod are stably clamped on the base, and the detection precision of the three-coordinate measuring machine on the standard rods is improved.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and more specifically, to a clamping device and a calibration system for a standard instrument. Background Art

[0002] The length, circumference and hardness of cigarettes are important physical performance indicators of cigarettes. Their values ​​not only affect the intrinsic quality of cigarette products, but also change the smoke parameters. Currently, before each test, the machine is self-calibrated using length standard rods, circumference standard rods and hardness standard rods.

[0003] According to relevant regulations, the verification / calibration cycle of the standard rod is one year. In the prior art, a three-coordinate measuring instrument can be used to verify / calibrate the standard rod. The three-coordinate measuring instrument includes a detection head and a platform arranged below the detection head. Figure 3 ), circumference standard rod (see Figure 4 ) or hardness standard rod is placed on the platform, and the detection head can verify / calibrate the standard rod. However, the surface of the length standard rod in contact with the platform is a circular surface, and the circular standard rod and the hardness standard rod are not easy to be stable when placed on the platform. These factors reduce the detection accuracy of the three-dimensional coordinate measuring machine for the standard rod. Utility Model Content

[0004] The present application provides a clamping device and calibration system for a standard instrument, wherein a base is positioned on a three-dimensional coordinate measuring machine through a connecting hole, and a length standard rod clamping portion and a circumference standard rod clamping portion are provided on the base, and verification / calibration is performed while the length standard rod and the circumference standard rod are stably clamped on the base, thereby improving the detection accuracy of the three-dimensional coordinate measuring machine for the standard rod.

[0005] The present application provides a clamping device for a standard instrument, comprising a base, at least one length standard rod clamping portion and at least one circumference standard rod clamping portion positioned on the base;

[0006] A plurality of connection holes for connecting with a three-coordinate measuring machine are symmetrically arranged on the base.

[0007] Preferably, the clamping device of the standard tool further comprises a calibration ball for self-calibrating the three-dimensional coordinate measuring machine, and the calibration ball comprises a standard ball and a first base for supporting the standard ball.

[0008] Preferably, the clamping device of the standard instrument also includes a coordinate block for the three-dimensional coordinate measuring machine to establish a coordinate system, and the shape of the coordinate block is a triangular prism.

[0009] Preferably, the length standard rod clamping portion comprises a first fixed clamping portion and a first movable clamping portion arranged from bottom to top;

[0010] First semicircular limiting grooves are respectively provided on the opposite surfaces of the first fixed clamping part and the first movable clamping part; in the working state, the two first semicircular limiting grooves are buckled, and the middle part of the length standard rod is accommodated in the horizontal hole-shaped space formed after the buckling.

[0011] Preferably, the first movable clamping portion is symmetrically provided with two threaded holes, and screws are provided in the threaded holes;

[0012] A first limiting groove is provided on the top surface of the first fixed clamping portion at a position corresponding to the threaded hole, and the lower end of the screw is limited in the first limiting groove.

[0013] Preferably, two first guide rods are symmetrically provided on the top surface of the first fixed clamping portion, and two first guide holes are symmetrically provided on the first movable clamping portion, and the first guide rods pass through the first guide holes corresponding in position.

[0014] Preferably, a line connecting the bottom ends of the two first guide rods intersects a line connecting the two limiting grooves.

[0015] Preferably, each circumferential standard rod clamping portion comprises a second fixed clamping portion and a second movable clamping portion which are adjacently arranged;

[0016] Second semicircular limiting grooves are respectively arranged on the opposite surfaces of the second fixed clamping part and the second movable clamping part; in the working state, the two second semicircular limiting grooves are buckled together, and the clamping end of the circumference standard rod is accommodated in the vertical hole-shaped space formed after the buckling.

[0017] Preferably, all the second fixing clamping parts are integrally formed to form a circumferential standard rod fixing clamping seat;

[0018] A distance adjustment structure is provided between the circumference standard rod fixed clamping seat and the second movable clamping part.

[0019] The present application also provides a standard instrument calibration system, including the above-mentioned standard instrument clamping device and a three-dimensional coordinate measuring machine, wherein the base of the clamping device is positioned on the workbench of the three-dimensional coordinate measuring machine through a connecting hole.

[0020] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 A schematic diagram of the structure of the clamping device of the standard instrument provided in this application;

[0023] Figure 2A side view of the clamping device of the standard tool provided for the present application;

[0024] Figure 3 A schematic diagram of the structure of the length standard rod provided for this application;

[0025] Figure 4 This is a schematic diagram of the structure of the circular standard rod provided in this application. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0029] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] The present application provides a clamping device and calibration system for a standard instrument, wherein a base is positioned on a three-dimensional coordinate measuring machine through a connecting hole, and a length standard rod clamping portion and a circumference standard rod clamping portion are provided on the base, and verification / calibration is performed while the length standard rod and the circumference standard rod are stably clamped on the base, thereby improving the detection accuracy of the three-dimensional coordinate measuring machine for the standard rod.

[0031] like Figure 1 As shown, the clamping device of the standard instrument provided by the present application includes a base 100, at least one length standard rod clamping portion 200 and at least one circumference standard rod clamping portion 300 positioned on the base 100. The base 100 is symmetrically provided with a plurality of connection holes 110 connected to a three-dimensional coordinate measuring machine.

[0032] As an example, Figure 1 As shown, a plurality of length standard rod clamping parts 200 are arranged at intervals from each other. The length standard rod clamping part 200 includes a first fixed clamping part 220 and a first movable clamping part 210 arranged from bottom to top.

[0033] First semicircular limiting grooves (221 and 211) are respectively provided on the opposite surfaces of the first fixed clamping portion 220 and the first movable clamping portion 210.

[0034] In the working state, the two first semicircular limit grooves (221 and 211) are buckled, and the middle part of the length standard rod is accommodated in the horizontal hole-shaped space formed after the buckling, so that the length standard rod is clamped horizontally, and its two ends are exposed to the outside of the length standard rod clamping part 200, which is convenient for the three-dimensional coordinate measuring machine to detect the coordinates of the two ends of the length standard rod and realize verification / calibration.

[0035] Specifically, Figure 1 As shown, two threaded holes are symmetrically arranged on the first movable clamping part 210, and screws 230 are arranged in the threaded holes. A first limiting groove is arranged on the top surface of the first fixed clamping part 220 at a position corresponding to the threaded holes, and the lower end of the screw 230 is limited in the first limiting groove. When the distance between the first fixed clamping part 220 and the first movable clamping part 210 needs to be adjusted, the screw 230 is manually rotated. Since there is no thread in the first limiting groove, the screw 230 cannot move, so that the first movable clamping part 210 moves relative to the first fixed clamping part 220, so that the distance between the two increases or decreases.

[0036] Preferably, two first guide rods 240 are symmetrically provided on the top surface of the first fixed clamping part 220 , and two first guide holes are symmetrically provided on the first movable clamping part 210 . The first guide rods 240 pass through the first guide holes corresponding to the positions to provide guidance for the first movable clamping part 210 .

[0037] Preferably, the line connecting the bottom ends of the two first guide rods 240 intersects with the line connecting the two limiting grooves, so that the two screws 230 are located on the diagonal line, and the two first guide rods 240 are located on the diagonal line, so that the movement of the first movable clamping part 210 is more stable.

[0038] As an embodiment, a plurality of circumferential standard rod clamping parts are arranged at intervals from each other. Each circumferential standard rod clamping part includes a second fixed clamping part and a second movable clamping part ( Figure 1 The two are shown to be arranged horizontally). Second semicircular limiting grooves are respectively provided on the opposite surfaces of the second fixed clamping part and the second movable clamping part; in the working state, the two second semicircular limiting grooves are buckled, the clamping end of the circumference standard rod is accommodated in the vertical hole-shaped space formed after the buckling, and the detection end is exposed above the clamping part of the circumference standard rod, so that the three-dimensional coordinate measuring machine can detect the coordinates of the detection end of the circumference standard rod to achieve verification / calibration.

[0039] Preferably, if Figure 1 and 2As shown, the second fixed clamping parts of all the circumference standard rod clamping parts are integrally formed to form a circumference standard rod fixed clamping seat 310. All the second movable clamping parts 320 are arranged at intervals. A plurality of second semicircular limiting grooves 311 are respectively provided in the length direction of the circumference standard rod fixed clamping seat 310, and the second semicircular limiting groove 321 on each second movable clamping part 320 corresponds to the position of one of the second semicircular limiting grooves 311.

[0040] Preferably, a second base 350 is fixed on the base 100 , the circumference standard rod fixed clamping seat 310 is fixed on the second base 350 , and the second movable clamping portion 320 is slidably disposed on the second base 350 .

[0041] A distance adjustment structure is provided between the circumference standard rod fixed clamp 310 and each second movable clamp 320. Specifically, Figure 1 and 2 As shown, two threaded holes are symmetrically arranged on the second movable clamping part 320, and screws 340 are arranged in the threaded holes. A second limiting groove is arranged at a position corresponding to the threaded hole of each second movable clamping part 320 on the circumference standard rod fixed clamping part 310, and the end of the screw 340 is limited in the second limiting groove. When the distance between the circumference standard rod fixed clamping part 310 and the second movable clamping part 320 needs to be adjusted, the screw 340 is manually rotated. Since there is no thread in the second limiting groove, the screw 340 cannot move, so that the second movable clamping part 320 moves relative to the circumference standard rod fixed clamping part 310, so that the distance between the two increases or decreases.

[0042] Preferably, two second guide rods 330 are symmetrically provided on the side of the circumferential standard rod fixed clamp 310 facing the second movable clamping part 320, and two second guide holes are symmetrically provided on the second movable clamping part 320. The second guide rods 330 pass through the second guide rods 330 at the corresponding positions to provide guidance for the second movable clamping part 320.

[0043] As an example, Figure 1 and 2 As shown, the second movable clamping portion 320 has a cube shape, and the line between the two screws 340 is parallel to the line between the two second guide rods 330 .

[0044] Preferably, the clamping device of the standard instrument further includes a calibration ball 500 for self-calibrating the three-dimensional coordinate measuring machine. The calibration ball 500 includes a standard ball 510 at the upper end and a first base 520 supporting the standard ball 510 .

[0045] On the basis of the above, preferably, Figure 1 As shown, the clamping device of the standard instrument also includes a coordinate block 400 for the three-dimensional coordinate measuring machine to establish a coordinate system, and the shape of the coordinate block 400 is a triangular prism.

[0046] On the basis of the above, the present application also provides a standard instrument calibration system, including the above standard instrument clamping device and a three-dimensional coordinate measuring machine, and the base 100 of the clamping device is positioned on the workbench of the three-dimensional coordinate measuring machine through the connecting hole 110.

[0047] When using this calibration system to verify / calibrate the length standard rod and the circumference standard rod, first perform system self-calibration through the calibration ball 500. The standard ball 510 has very precise dimensions. After installing the probe of the three-dimensional coordinate measuring machine on the three-dimensional coordinate measuring machine, use the three-dimensional coordinate measuring machine to hit a preset number (for example, 5) of points at different positions and heights on the standard ball 510. The three-dimensional coordinate measuring machine will automatically construct a ball using the coordinates of these points, and then determine whether the diameter of the constructed ball is consistent with the standard diameter of the standard ball. If not, it means that the probe is broken and a better probe is needed. If it is consistent, perform the following operations.

[0048] After the self-calibration is completed, it is necessary to use the coordinate block 400 to establish a three-coordinate system, that is, to determine the XYZ axis. First, randomly select a surface of the coordinate block 400 (recorded as the first surface), use the three-coordinate measuring machine to mark three points that are not on a straight line on the first surface, and use these three points to determine a surface in space (recorded as the first measuring surface). Then select another surface of the coordinate block 400 (recorded as the second surface), and randomly mark two points on the second surface. The system will automatically use these two points to determine a surface perpendicular to the first measuring surface (recorded as the second measuring surface). Then mark a point on the third surface of the coordinate block 400 (perpendicular to the first measuring surface and the second measuring surface), the system will automatically identify the third measuring surface, determine the xyz axis based on the first measuring surface, the second measuring surface and the third measuring surface, and the origin position will also be automatically identified.

[0049] The length and circumference standard rods can then be calibrated. Figure 3 After the middle portion 10 of the length standard rod is clamped in the length standard rod clamping portion 200, the three-dimensional coordinate measuring machine detects the coordinates of the two ends of the length standard rod, and the distance between the two coordinates is used as the actual length of the length standard rod.

[0050] Combination Figure 4 , clamp the clamping end 21 of the circumference standard rod on the circumference standard rod clamping part 300, and use a three-coordinate measuring machine to mark three points on its detection end 22, so that the actual circumference size of the circumference standard rod can be measured.

[0051] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A clamping device for a standard instrument, characterized in that: The invention comprises a base, at least one length standard rod clamping portion and at least one circumference standard rod clamping portion positioned on the base; The base is symmetrically provided with a plurality of connection holes connected with a three-dimensional coordinate measuring machine.

2. The standard fixture clamping device according to claim 1, characterized in that: The invention also includes a calibration ball for self-calibrating the three-dimensional coordinate measuring machine, wherein the calibration ball includes a standard ball and a first base supporting the standard ball.

3. The standard fixture clamping device according to claim 1 or 2, characterized in that: It also includes a coordinate block for the three-dimensional coordinate measuring machine to establish a coordinate system, and the shape of the coordinate block is a triangular prism.

4. The clamping device for standard equipment according to claim 1, characterized in that: The length standard rod clamping part comprises a first fixed clamping part and a first movable clamping part arranged from bottom to top; First semicircular limiting grooves are respectively provided on the opposite surfaces of the first fixed clamping part and the first movable clamping part; in the working state, the two first semicircular limiting grooves are buckled together, and the middle part of the length standard rod is accommodated in the horizontal hole-shaped space formed after the buckling.

5. The standard fixture clamping device according to claim 4, characterized in that: The first movable clamping portion is symmetrically provided with two threaded holes, and screws are arranged in the threaded holes; A first limiting groove is provided on the top surface of the first fixing clamping portion at a position corresponding to the threaded hole, and the lower end of the screw is limited in the first limiting groove.

6. The standard fixture clamping device according to claim 5, characterized in that: Two first guide rods are symmetrically arranged on the top surface of the first fixed clamping portion, and two first guide holes are symmetrically arranged on the first movable clamping portion, and the first guide rods pass through the first guide holes corresponding to the positions.

7. The standard fixture clamping device according to claim 6, characterized in that: A line connecting the bottom ends of the two first guide rods intersects a line connecting the two limiting grooves.

8. The standard fixture clamping device according to claim 1, characterized in that: Each of the circumference standard rod clamping parts comprises a second fixed clamping part and a second movable clamping part which are arranged adjacent to each other; Second semicircular limiting grooves are respectively provided on the opposite surfaces of the second fixed clamping part and the second movable clamping part; in the working state, the two second semicircular limiting grooves are buckled together, and the clamping end of the circumference standard rod is accommodated in the vertical hole-shaped space formed after the buckling.

9. The standard fixture clamping device according to claim 8, characterized in that: All the second fixing and clamping parts are integrally formed to form a circumferential standard rod fixing and clamping seat; A distance adjustment structure is provided between the circumference standard rod fixed clamping seat and the second movable clamping part.

10. A calibration system for a standard instrument, characterized in that: A clamping device comprising a standard instrument as claimed in any one of claims 1 to 9 and a three-dimensional coordinate measuring machine, wherein the base of the clamping device is positioned on a workbench of the three-dimensional coordinate measuring machine through a connecting hole.

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