Three-coordinate detection part positioning tool and method

Abstract

The invention discloses a three-coordinate detection part positioning tool and method, and relates to the technical field of precision measurement. The device comprises a positioning disc used for positioning a to-be-detected part, and the positioning disc is provided with a plurality of through first positioning hole groups; the workpiece positioning mechanism comprises a positioning rod detachably installed in the first positioning hole group and a pressing plate movably installed on the positioning rod, and the pressing plate abuts against the surface of the to-be-detected part; the adjusting and supporting mechanism comprises an adjusting mechanism connected with the positioning disc and a supporting mechanism, the adjusting mechanism comprises a pitching adjusting mechanism and a rolling adjusting mechanism, and the supporting mechanism is used for supporting the adjusting mechanism; the supporting base is used for bearing and installing the supporting mechanism, a plurality of vertically-penetrating second positioning holes are formed in the supporting base, and the supporting mechanism is detachably connected with the corresponding second positioning holes through bolts; the purposes of universality, adaptability, convenient adjustment, high positioning precision and high stability are achieved.

Description

Technical Field

[0001] The invention relates to the field of precision measurement technology, in particular to a three-coordinate detection part positioning tool and method. Background Art

[0002] In the manufacturing industry, high-precision and high-efficiency measurement of workpieces is an important part of ensuring product quality. As the core tool of modern measurement technology, the coordinate measuring machine (CMM) can provide accurate spatial position and dimension data for workpieces of various complex shapes. However, during the measurement process, how to effectively and stably fix the workpiece and adjust the angle to facilitate measurement of special areas has become an urgent problem to be solved.

[0003] At present, traditional three-dimensional coordinate measurement fixtures usually adopt a rigid structure, and fix the workpiece on the measurement platform by mechanical locking and other means. However, this rigid fixture has the following disadvantages: Poor versatility: Due to the differences in shapes and sizes of different workpieces, rigid fixtures often need to be customized according to the specific workpiece, which not only increases costs but also reduces measurement efficiency.

[0004] In order to solve the above problems, some flexible clamps have appeared on the market, such as pneumatic clamps, electric clamps, etc. Although these clamps have improved versatility and adaptability to a certain extent, the following problems still exist: Insufficient precision: When a flexible fixture clamps a workpiece, the uneven distribution of clamping force can easily cause the workpiece to deform, thus affecting the measurement accuracy.

[0005] Poor stability: Flexible fixtures often cannot provide sufficient stability when clamping large workpieces, resulting in shaking or displacement during measurement.

[0006] In particular, the flexibility is insufficient: for complex shapes and large workpieces, the angle often needs to be adjusted multiple times during the inspection process, resulting in low measurement efficiency, especially when the angle needs to be adjusted quickly and accurately during the measurement process to adapt to the inspection of special areas in three-coordinate inspection.

[0007] In summary, the existing three-coordinate measuring fixtures have deficiencies in versatility, adaptability, adjustment difficulty, accuracy and stability. Therefore, it is necessary to develop a new type of flexible three-coordinate detection fixture to overcome the shortcomings of the existing technology and improve measurement efficiency and accuracy. Summary of the invention

[0008] One of the purposes of the present invention is to provide a three-coordinate detection part positioning tool to achieve the purposes of versatility, adaptability, convenient adjustment, high positioning accuracy and high stability.

[0009] In addition, a second object of the present invention is to provide a three-coordinate detection part positioning method to achieve efficient positioning and improve measurement efficiency and accuracy.

[0010] In order to achieve one of the above purposes, the present invention adopts the following technical means: A three-coordinate detection part positioning tool, characterized by comprising A positioning plate, used for positioning the part to be inspected, wherein the positioning plate is provided with a plurality of first positioning hole groups penetrating therethrough; A workpiece positioning mechanism, comprising a positioning rod detachably mounted in the first positioning hole group, and a pressing plate movably mounted on the positioning rod, the pressing plate abutting against the surface of the part to be inspected; An adjusting support mechanism, comprising an adjusting mechanism and a supporting mechanism connected to the positioning plate, wherein the adjusting mechanism comprises a pitch adjusting mechanism and a roll adjusting mechanism, and the supporting mechanism is used to support the adjusting mechanism; A support base, used for supporting and installing the support mechanism, wherein the support base is configured with a plurality of second positioning holes that vertically penetrate therethrough, and the support mechanism is detachably connected to the corresponding second positioning holes by bolts; There are at least three workpiece positioning mechanisms, and the workpiece positioning mechanisms are equidistantly arranged around the axis of the part to be inspected.

[0011] Preferably, the positioning plate is a circular plate, and the first positioning hole group includes a radial hole band arranged radially along the positioning plate and a circumferential hole band arranged along the axis of the positioning plate, the radial hole band is composed of a plurality of first circular holes, and the circumferential hole band is composed of a plurality of second circular holes.

[0012] Furthermore, a plurality of radial hole bands are provided along the circumference of the circular disk, wherein the circumferential hole band is provided at an end of the radial hole band further away from the axis of the positioning disk, and two adjacent second circular holes are equidistantly arranged.

[0013] Furthermore, one end of the positioning rod is constructed with a first thread for threaded connection with the first positioning hole group, and the other end of the positioning rod is constructed with a second thread, the first thread and the second thread are arranged in opposite directions, and a clamping nut is threadedly installed on the second thread, and the clamping nut abuts against the pressure plate.

[0014] Furthermore, a smooth section is constructed between the first thread and the second thread, and the pressure plate is rotatably arranged on the smooth section. The end of the pressure plate opposite to the positioning rod serves as a pressing end, and a rubber pad is installed on the side of the pressing end facing the workpiece.

[0015] Furthermore, the pitch adjustment mechanism includes a first worm gear rotating device, a positioning frame is coaxially installed at the turbine position of the first worm gear rotating device, a second worm gear device serving as the roll adjustment mechanism is installed on the positioning frame, the positioning plate is coaxially installed at the turbine position of the second worm gear device, the rotation axis of the first worm gear rotating device is horizontally set, and the rotation axis of the second worm gear device is vertically set.

[0016] Furthermore, the second positioning holes are arranged in a matrix.

[0017] The positioning tooling involved in this application has the following beneficial effects during use: The structure is compact, the operation is simple, the stability and reliability are stable, the weight is light, and the cost is low. The workpiece to be fixed is pressed by the pressure plate on the positioning rod, so that the workpiece to be positioned is pressed on the positioning plate. By installing the positioning rod in the workpiece positioning mechanism in different first positioning hole groups, it can be ensured that the workpiece to be positioned is fixed on the positioning plate in an eccentric or coaxial position on the positioning plate based on the good positioning effect of the workpiece positioning mechanism, so that the workpiece to be material is fixed on the positioning plate in an eccentric or coaxial position, thereby using a fully rigid clamp to achieve the purpose of a flexible clamp. For workpieces of different sizes, different shapes, and workpieces that require different measurement positions, the workpiece can be clamped stably and firmly according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the first viewing angle of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure from the second viewing angle of the present invention.

[0020] Among them, 1-positioning plate, 2-first positioning hole group, 21-radial hole band, 22-circumferential hole band, 3-positioning rod, 4-pressure plate, 5-pitch adjustment mechanism, 51-first worm gear rotating device, 52-positioning frame, 6-roll adjustment mechanism, 7-support mechanism, 8-support base, 9-second positioning hole, 10-tightening nut. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] Please refer to Figure 1 and Figure 2 As shown, a three-coordinate detection part positioning tooling includes A positioning plate 1, used for positioning the part to be inspected, wherein the positioning plate 1 is provided with a plurality of first positioning hole groups 2 penetrating therethrough; The workpiece positioning mechanism comprises a positioning rod 3 detachably mounted in the first positioning hole group 2, and a pressing plate 4 movably mounted on the positioning rod 3, wherein the pressing plate 4 abuts against the surface of the part to be inspected; An adjusting support mechanism, comprising an adjusting mechanism connected to the positioning plate 1 and a supporting mechanism 7, wherein the adjusting mechanism comprises a pitch adjusting mechanism 5 and a roll adjusting mechanism 6, and the supporting mechanism 7 is used to support the adjusting mechanism; A support base 8, used for supporting and installing the support mechanism 7, wherein a plurality of second positioning holes 9 vertically passing through the support base 8 are configured, and the support mechanism 7 is detachably connected to the corresponding second positioning holes 9 by bolts; There are at least three workpiece positioning mechanisms, and the workpiece positioning mechanisms are equidistantly arranged around the axis of the part to be inspected.

[0026] In this way, the positioning fixture involved in the present application has a compact structure, simple operation, stability and reliability, light weight and low cost. The workpiece to be fixed is pressed by the pressure plate 4 on the positioning rod 3, so that the workpiece to be positioned is pressed on the positioning disk 1. By installing the positioning rod 3 in the workpiece positioning mechanism in different first positioning hole groups 2, it can be ensured that the workpiece to be positioned is fixed on the positioning disk 1 in an eccentric or coaxial position on the basis of the good positioning effect of the workpiece positioning mechanism for the workpiece to be positioned, so that the workpiece to be material is fixed on the positioning disk 1 in an eccentric or coaxial position, thereby using a fully rigid clamp to achieve the purpose of a flexible clamp. For workpieces of different sizes, different shapes, and workpieces that require different measurement positions, the workpiece can be clamped stably and firmly according to actual needs.

[0027] At the same time, the adjustment mechanism can be used to turn the workpiece that has been positioned, so as to adjust the side view of the workpiece. Similarly, the entire positioning fixture can be turned by installing the support mechanism 7 in different second positioning holes 9. Compared with the flexible structure that directly uses the steering device for steering, the support mechanism 7 with a rigid structure can provide stability when measuring large workpieces.

[0028] By utilizing three workpiece positioning mechanisms, even when the adjusting mechanism is turning over and adjusting the workpiece, it is possible to prevent the workpiece from slipping off the positioning plate 1 due to deflection.

[0029] Furthermore, the positioning disk 1 is a circular disk, and the first positioning hole group 2 includes a radial hole band 21 arranged radially along the positioning disk 1 and a circumferential hole band 22 arranged along the axis of the positioning disk 1, the radial hole band 21 is composed of a plurality of first circular holes, and the circumferential hole band 22 is composed of a plurality of second circular holes.

[0030] In this way, when positioning the workpiece, when off-axis positioning is required, a workpiece positioning mechanism is first installed in the second circular hole on the circumferential hole band 22, and then the already positioned workpiece positioning mechanism is able to rotate around its axis, thereby achieving stable clamping and positioning of the workpiece to be positioned in an off-axis state.

[0031] Furthermore, a plurality of radial hole bands 21 are provided around the central axis of the circular disk, the circumferential hole band 22 is provided at an end of the radial hole band 21 further away from the axis of the positioning disk 1, and two adjacent second circular holes are equidistantly provided.

[0032] For the workpiece positioning mechanism, one end of the positioning rod 3 is constructed with a first thread for threaded connection with the first positioning hole group 2, and the other end of the positioning rod 3 is constructed with a second thread, the first thread and the second thread are arranged in opposite directions, and a clamping nut 10 is threadedly installed on the second thread, and the clamping nut 10 abuts against the pressure plate 4.

[0033] Furthermore, in this embodiment, by utilizing the first thread and the second thread which are arranged in opposite directions, when the pressure plate 4 is used to press the workpiece, in the process of rotating the positioning rod 3 and allowing the pressure plate 4 to move downward under the abutment of the clamping nut 10, after the pressure plate 4 contacts the workpiece, the second thread which is arranged in opposite directions to the first thread can prevent the pressure plate 4 from driving the clamping nut 10 to rotate, thereby allowing the clamping nut 10 to move in the direction away from the workpiece along the axis of the positioning rod 3, and the second thread can be utilized to lock the clamping nut 10 during the clamping process.

[0034] Specifically, a smooth section is constructed between the first thread and the second thread, and the pressure plate 4 is rotatably arranged on the smooth section. The end of the pressure plate 4 opposite to the positioning rod 3 serves as a pressing end, and a rubber pad is installed on the side of the pressing end facing the workpiece.

[0035] As for the adjustment mechanism in the present application, the pitch adjustment mechanism 5 includes a first worm gear rotating device 51, a positioning frame 52 is coaxially installed at the turbine position of the first worm gear rotating device 51, a second worm gear device serving as the roll adjustment mechanism 6 is installed on the positioning frame 52, the positioning plate 1 is coaxially installed at the turbine position of the second worm gear device, the rotation axis of the first worm gear rotating device 51 is horizontally arranged, and the rotation axis of the second worm gear device is vertically arranged.

[0036] Meanwhile, the second positioning holes 9 are arranged in a matrix.

[0037] Specifically, when the present application is used to clamp the workpiece, a three-coordinate detection part positioning method is used to position the workpiece using the aforementioned three-coordinate detection part positioning tooling, and the workpiece positioning mechanism is installed in different first positioning hole groups 2 to adapt to workpieces in different states for positioning; The workpiece to be positioned is coaxially or eccentrically positioned on the positioning plate 1; The support mechanism 7 is installed on the support base 8 by being disassembled forwardly or laterally.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-coordinate detection part positioning tool, characterized in that: include A positioning plate (1) for positioning a part to be inspected, wherein the positioning plate (1) is provided with a plurality of first positioning hole groups (2) extending therethrough; A workpiece positioning mechanism, comprising a positioning rod (3) detachably mounted in the first positioning hole group (2), and a pressing plate (4) movably mounted on the positioning rod (3), wherein the pressing plate (4) abuts against a surface of a part to be inspected; An adjustment support mechanism, comprising an adjustment mechanism connected to the positioning plate (1) and a support mechanism (7), the adjustment mechanism comprising a pitch adjustment mechanism (5) and a roll adjustment mechanism (6), and the support mechanism (7) is used to support the adjustment mechanism; A support base (8) for supporting and installing the support mechanism (7); the support base (8) is provided with a plurality of second positioning holes (9) extending vertically therethrough; the support mechanism (7) is detachably connected to the corresponding second positioning holes (9) by means of bolts; There are at least three workpiece positioning mechanisms, and the workpiece positioning mechanisms are equidistantly arranged around the axis of the part to be inspected.

2. A three-coordinate detection part positioning tool according to claim 1, characterized in that: The positioning disk (1) is a circular disk, and the first positioning hole group (2) comprises a radial hole band (21) arranged radially along the positioning disk (1) and a circumferential hole band (22) arranged along the axis of the positioning disk (1), the radial hole band (21) being composed of a plurality of first circular holes, and the circumferential hole band (22) being composed of a plurality of second circular holes.

3. A three-coordinate detection part positioning tool according to claim 2, characterized in that: A plurality of radial hole bands (21) are provided around the central axis of the circular disk, the circumferential hole band (22) is provided at an end of the radial hole band (21) further away from the axis of the positioning disk (1), and two adjacent second circular holes are arranged at equal distances.

4. The three-coordinate detection part positioning tool according to claim 1, characterized in that: One end of the positioning rod (3) is configured with a first thread for threaded connection with the first positioning hole group (2), and the other end of the positioning rod (3) is configured with a second thread, the first thread and the second thread are arranged in opposite directions, a clamping nut (10) is threadedly installed on the second thread, and the clamping nut (10) abuts against the pressure plate (4).

5. The three-coordinate detection part positioning tool according to claim 4, characterized in that: A smooth section is also constructed between the first thread and the second thread, the pressure plate (4) is rotatably arranged on the smooth section, the end of the pressure plate (4) opposite to the positioning rod (3) serves as a pressing end, and a rubber pad is installed on a side of the pressing end facing the workpiece.

6. The three-coordinate detection part positioning tool according to claim 1, characterized in that: The pitch adjustment mechanism (5) comprises a first worm gear rotating device (51), a positioning frame (52) is coaxially mounted on a turbine position of the first worm gear rotating device (51), a second worm gear device serving as the roll adjustment mechanism (6) is mounted on the positioning frame (52), the positioning plate (1) is coaxially mounted on the turbine position of the second worm gear device, the rotation axis of the first worm gear rotating device (51) is horizontally arranged, and the rotation axis of the second worm gear device is vertically arranged.

7. The three-coordinate detection part positioning tool according to claim 1, characterized in that: The second positioning holes (9) are arranged in a matrix.

8. A three-coordinate detection part positioning method, characterized in that: The three-coordinate detection part positioning tooling according to any one of claims 1 to 7 is used for positioning, wherein the workpiece positioning mechanism is installed in different first positioning hole groups (2) to adapt to workpieces in different states for positioning; The workpiece to be positioned is coaxially or eccentrically positioned on the positioning plate (1); The support mechanism (7) is disassembled and installed on the support base (8) in a forward or sideways manner.

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