Auxiliary positioning tool for three-coordinate measuring instrument

Abstract

The utility model relates to the technical field of fastener processing, and discloses an auxiliary positioning tool for a three-coordinate measuring instrument, the auxiliary positioning tool comprises a positioning frame, the positioning frame is installed on an operation platform, the middle part of the upper side surface of the positioning frame is provided with a positioning groove, the positioning groove is provided with a pressing block, and the pressing block is connected with the positioning frame. A fixing structure capable of fixing the pressing block is arranged on the positioning frame and comprises a positioning plate, the pressing block is installed on the lower side face of the positioning plate, a plurality of positioning holes and a plurality of threaded holes are formed in the positions, located on the two sides of the positioning groove, of the positioning frame respectively, and limiting rods capable of being inserted into the positioning holes are arranged on one side of the positioning plate. And the other side is in threaded connection with a bolt which can be in threaded connection with the threaded hole. According to the utility model, the position of the pressing block can be adjusted according to the length and the size of the cylinder to be measured, so that the pressing block can always fix the cylinder part in the positioning groove, and stability and reliability are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fastener processing, in particular to an auxiliary positioning tool for a three-coordinate measuring instrument. Background Art

[0002] A three-coordinate measuring machine is an instrument that can measure geometric shapes, lengths, and circular divisions within a hexahedral space. It is also called a three-coordinate measuring machine. With the continuous development of science and technology, three-coordinate measuring machines are constantly being updated. However, the existing three-coordinate measuring machines are difficult to accurately and quickly locate the products that need to be measured.

[0003] During the fastener processing, it is necessary to detect the form and position tolerances of cylindrical parts. During measurement, it is necessary to ensure that the cylindrical parts are in a relatively static state. Currently, cylindrical parts are clamped by fixtures. When the existing fixtures clamp cylindrical parts, the fixed support surfaces of the fixtures and cylindrical parts are small, which easily causes the cylindrical parts to deflect. In addition, the cylindrical parts need to be exposed outward as much as possible so that the measuring head of the three-dimensional coordinate measuring machine can perform comprehensive measurement of the cylindrical parts to improve the measurement accuracy. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an auxiliary positioning tool for a three-coordinate measuring machine, aiming to improve the deflection of clamping cylindrical parts in the prior art and the inability to adjust the length of the cylindrical parts extending out of the fixture, which affects the accuracy of measurement.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An auxiliary positioning tool for a three-dimensional coordinate measuring instrument, the three-dimensional coordinate measuring instrument comprises an operating platform, the top of the operating platform is slidably connected to a bridge, the top of the bridge is fixedly connected to a crossbeam, a slide is slidably connected to the crossbeam, and a measuring head is installed at the bottom of the slide, characterized in that: the auxiliary positioning tool comprises a positioning frame, the positioning frame is installed on the operating platform, a positioning groove is provided in the middle of the upper side of the positioning frame, a clamping block is provided on the positioning groove, and a fixing structure capable of fixing the clamping block is provided on the positioning frame;

[0007] The fixing structure includes a positioning plate, the clamping block is installed on the lower side of the positioning plate, and a plurality of positioning holes and a plurality of threaded holes are respectively provided on the positioning frames located on both sides of the positioning groove. The plurality of positioning holes and the plurality of threaded holes are symmetrically arranged one by one. A limiting rod that can be inserted into the positioning hole is provided on one side of the positioning plate, and a bolt that can be threadedly connected to the threaded hole is threadedly connected on the other side.

[0008] As a further description of the above technical solution: the positioning frame is in an I-shape, and a plurality of bolt mounting holes are respectively provided on both sides of the bottom of the positioning frame.

[0009] As a further description of the above technical solution: the positioning groove is V-shaped.

[0010] As a further description of the above technical solution: two L-shaped frames are symmetrically arranged on the top of the pressing block, and the two L-shaped frames are slidably mounted on the positioning plate.

[0011] As a further description of the above technical solution: both L-shaped frames are threadedly connected with fixing bolts.

[0012] As a further description of the above technical solution: an arc-shaped groove is provided at the bottom of the pressing block, and arc-shaped blocks are hinged on both sides of the arc-shaped groove.

[0013] As a further description of the above technical solution: rubber pads are fixedly connected to the outer sides of the two arc-shaped blocks.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, by adjusting the distance between the pressing block and the positioning groove, cylindrical parts of different sizes can be clamped and fixed, and one side of the positioning plate is fixed by bolts, and the other side plays a guiding and limiting role, which is convenient for disassembly and assembly; in addition, the arc block rotates in the arc groove, so that the arc block fits the cylindrical part more closely, increases the fixed bearing surface of the cylindrical part, avoids the deflection of the cylindrical part, and improves the stability of the fixing of the cylindrical part;

[0016] 2. The utility model is provided with a plurality of positioning holes and threaded holes, and the horizontal positions of the positioning plate and the clamping block can be adjusted according to the length of the cylindrical part. When the cylindrical part is shorter, the positioning plate can be moved horizontally outward to clamp the clamping block on the end of the cylindrical part as much as possible, so that the cylindrical part can extend more out of the positioning groove, which is convenient for the measuring head to perform comprehensive measurement of the cylindrical part and improve the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 is a structural diagram of Embodiment 2;

[0019] Figure 3 yes Figure 2 Structural details of the middle clamping block;

[0020] Figure 4 It is an overall schematic diagram of the utility model installed on a three-coordinate measuring instrument.

[0021] Legend:

[0022] 1. Operating platform; 2. Bridge; 3. Crossbeam; 4. Slide; 5. Measuring head; 6. Positioning plate; 61. Positioning groove; 62. Positioning hole; 63. Threaded hole; 64. Bolt; 65. Positioning plate; 66. Limit rod; 67. Clamping block; 671. Arc groove; 68. Arc block; 69. Rubber pad; 7. L-shaped frame; 71. Fixing bolt. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Reference Figure 1 As shown, an auxiliary positioning tool for a three-dimensional coordinate measuring instrument, the three-dimensional coordinate measuring instrument includes an operating platform 1, the top of the operating platform 1 is slidably connected to a bridge 2, the top of the bridge 2 is fixedly connected to a crossbeam 3, the crossbeam 3 is slidably connected to a slide 4, and the bottom of the slide 4 is installed with a measuring head 5.

[0025] The auxiliary positioning tooling includes a positioning frame 6, which is installed on the operating platform 1. A positioning groove 61 is provided in the middle of the upper side of the positioning frame 6. The positioning groove 61 runs through the front and rear sides of the positioning frame 6. A clamping block 67 is provided on the positioning frame 6 above the positioning groove 61. A fixing structure capable of fixing the clamping block 67 is provided on the positioning frame 6.

[0026] The fixing structure includes a positioning plate 65, and the clamping block 67 is installed on the lower side of the positioning plate 65. A plurality of positioning holes 62 and a plurality of threaded holes 63 are respectively provided on the positioning frame 6 located on both sides of the positioning groove 61. The plurality of positioning holes 62 and the plurality of threaded holes 63 correspond to each other one by one and are symmetrically arranged on the left and right. A limiting rod 66 is vertically provided on one side of the positioning plate 65, and a bolt 64 is threadedly connected on the other side. The limiting rod 66 can be inserted into the positioning hole 62, and the bolt 64 can be threadedly connected with the threaded hole 63.

[0027] By adjusting the distance from the clamping block 67 to the positioning groove 61, cylindrical parts of different sizes can be clamped and fixed, and one side of the positioning plate is fixed by a bolt 64, and the limiting rod 66 on the other side plays a guiding and limiting role, which is convenient for disassembly and assembly. The height position of the positioning plate 65 is adjusted by the bolt 64 to meet the measurement requirements of cylindrical parts of different sizes; in addition, the horizontal position of the positioning plate 65 and the clamping block 67 can be adjusted according to the length of the cylindrical part. When the cylindrical part is shorter, the positioning plate 65 can be moved horizontally outward, the limiting rod 66 is inserted into the positioning hole 62 at a suitable position, and the bolt 64 is screwed into the threaded hole 63 at a suitable position. The clamping block 67 is clamped on the end of the cylindrical part as much as possible, so that the cylindrical part extends more out of the positioning groove 61, which is convenient for the measuring head 5 to perform a comprehensive measurement of the cylindrical part and improve the measurement accuracy.

[0028] In this embodiment, the positioning frame 6 is in an I-shape, and a plurality of bolt mounting holes are respectively provided on both sides of the bottom of the positioning frame 6. The positioning frame 6 is mounted on the operating platform 1 through the bolt mounting holes to prevent the positioning frame 6 from moving.

[0029] Preferably, the positioning groove 61 is V-shaped and has an arc transition at the bottom. The V-shaped positioning groove 61 is convenient for fixing the cylindrical part without causing the cylindrical part to deflect. At the same time, cylindrical parts of different sizes can contact the two sides of the positioning groove 61, thereby increasing the scope of application.

[0030] Embodiment 2:

[0031] Reference Figure 2-4 As shown, two L-shaped frames 7 are symmetrically provided on the top of the clamping block 67, and the two L-shaped frames 7 are slidably mounted on the positioning plate 65. The two L-shaped frames 7 are threadedly connected with fixing bolts 71, and the lower ends of the fixing bolts 71 extend to the top of the positioning plate 65. When the fixing bolts 71 are rotated downward, there is at least one position where the lower ends of the fixing bolts 71 contact the upper side surface of the positioning plate 65. When the clamping block 67 moves to a suitable position, the squeezing friction force of the fixing bolts 71 is used to fix the positioning plate 65 at the current position, and the structure is simple.

[0032] In addition, the L-shaped frame is provided to facilitate the disassembly and assembly of the clamping block 67. Only the bolt needs to be unscrewed upwards, and then the clamping block 67 is pulled to slide to the left, and the clamping block 67 can be removed separately, which is convenient for maintenance and replacement, thereby reducing the cost of use.

[0033] In this embodiment, an arc-shaped groove 671 is provided at the bottom of the clamping block 67, and arc-shaped blocks 68 are hinged on both sides of the arc-shaped groove 671. A rubber pad 69 is fixedly connected to the outer side of the arc-shaped block 68. The rubber pad 69 can increase the friction between the cylindrical part and the arc-shaped block 68 to prevent the cylindrical part from slipping.

[0034] By rotating the arc block 68 in the arc groove 671, the arc block 68 fits the cylindrical part more closely, increasing the fixed support surface between the cylindrical part and the arc groove 671, avoiding the deflection of the cylindrical part, and improving the stability of the fixation of the cylindrical part.

Claims

1. An auxiliary positioning tool for a three-dimensional coordinate measuring instrument, the three-dimensional coordinate measuring instrument comprising an operating platform (1), the top of the operating platform (1) is slidably connected to a bridge (2), the top of the bridge (2) is fixedly connected to a crossbeam (3), the crossbeam (3) is slidably connected to a slide (4), and a measuring head (5) is installed at the bottom of the slide (4), characterized in that: The auxiliary positioning tool comprises a positioning frame (6), the positioning frame (6) being mounted on the operating platform (1), a positioning groove (61) being provided in the middle of the upper side surface of the positioning frame (6), a pressing block (67) being provided on the positioning frame (6) above the positioning groove (61), and a fixing structure capable of fixing the pressing block (67) being provided on the positioning frame (6); The fixing structure comprises a positioning plate (65), the pressing block (67) is mounted on the lower side of the positioning plate (65), and a plurality of positioning holes (62) and a plurality of threaded holes (63) are respectively provided on the positioning frame (6) located on both sides of the positioning groove (61), and the plurality of positioning holes (62) and the plurality of threaded holes (63) are symmetrically arranged one by one. A limiting rod (66) capable of being inserted into the positioning hole (62) is provided on one side of the positioning plate (65), and a bolt (64) capable of being threadedly connected to the threaded hole (63) is threadedly connected on the other side.

2. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The positioning frame (6) is in an I-shape, and a plurality of bolt mounting holes are respectively provided on two sides of the bottom of the positioning frame (6).

3. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The positioning groove (61) is V-shaped.

4. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: Two L-shaped frames (7) are symmetrically arranged on the top of the pressing block (67), and the two L-shaped frames (7) are slidably mounted on the positioning plate (65).

5. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 4, characterized in that: The two L-shaped frames (7) are both threadedly connected with fixing bolts (71).

6. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 4, characterized in that: An arc-shaped groove (671) is provided at the bottom of the pressing block (67), and arc-shaped blocks (68) are hingedly connected to both sides of the arc-shaped groove (671).

7. The auxiliary positioning tool for a three-dimensional coordinate measuring machine according to claim 6, characterized in that: Rubber pads (69) are fixedly connected to the outer sides of the two arc-shaped blocks (68).

Images