Portable inspection fixture for measuring the taper of small rotating parts

Abstract

This utility model discloses a portable testing fixture for measuring the taper of small rotating parts. It includes a base with a V-groove on its upper surface. A stop block is vertically fixed to one end of the V-groove. A back plate is fixed to the back of the base. A horizontal slide rail is longitudinally arranged on the upper surface of the back plate. A slider is slidably mounted on the slide rail. The inner surface of the stop block serves as a limit stop at one end of the slide rail. A limit block is also provided on the upper surface of the other end of the slide rail. A clamping frame is mounted on the slider, and a dial indicator is clamped in the cantilever opening of the clamping frame. This utility model belongs to the technical field of mechanical parts measuring equipment and solves the problem that existing technologies, for high-precision parts or small rotating parts with extremely small tapers, lack effective measuring equipment on-site, resulting in untimely taper measurement and insufficient measurement accuracy.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical parts measuring equipment, and relates to a portable testing fixture for measuring the taper of small rotating parts. Background Technology

[0002] In the field of small parts machining, it is often necessary to deal with rotary parts with taper, such as tapered pins and tapered bolts. For rotary parts with general accuracy requirements, universal angle gauges, templates and other measuring tools can be used to quickly detect the taper. However, for parts with high accuracy requirements or extremely small taper (such as parts with a taper design of 1:200), conventional measurement methods cannot obtain effective measurement results. Precision instruments such as image measuring instruments and coordinate measuring machines equipped in the laboratory are required to complete the measurement. This also means that such parts cannot be measured in real time during on-site processing, which greatly increases the turnover and processing cycle of the parts and significantly reduces the processing efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a portable inspection fixture for measuring the taper of small rotating parts. This solves the problem that existing technologies, for high-precision parts or small rotating parts with extremely small tapers, lack effective measuring equipment on the processing site, resulting in untimely taper measurement and insufficient measurement accuracy.

[0004] The technical solution adopted by this utility model is a portable testing fixture for measuring the taper of small rotating parts, including a base. The upper surface of the base is set with a V-groove. A stop block is vertically fixed at one end of the V-groove of the base. A back plate is fixed on the back of the base. A horizontal slide rail is longitudinally arranged on the upper surface of the back plate. A slider is slidably mounted on the slide rail. The inner surface of the stop block serves as the limit limit at one end of the slide rail. A limit block is also set on the upper surface of the other end of the slide rail. A clamping frame is installed on the slider. A dial indicator is clamped in the cantilever opening of the clamping frame.

[0005] The portable testing fixture for measuring the taper of small rotating parts of this utility model is further characterized by: The V-groove has a flat bottom structure.

[0006] The upper surface of the slide rail has multiple screw holes longitudinally for installing limit screws.

[0007] The limit block is fixedly installed on the upper surface of the slide rail by limit screws.

[0008] The cantilever opening of the clamp has bolt holes on the side for installing locking screws.

[0009] The cantilever opening of the clamp is fastened by locking screws.

[0010] The stop block is L-shaped.

[0011] It also includes standard gauge blocks, which are used to fit closely to the limit block when measuring the midpoint.

[0012] The beneficial effect of this utility model is that this portable tooling can meet the taper detection requirements of small rotating parts. In particular, for small rotating parts with small taper, the actual taper of the part can be quickly measured by simply sliding, without relying on high-precision special measuring instruments, which has certain practical significance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is another three-dimensional structural schematic diagram of the present invention; Figure 3 This is a structural schematic diagram of the present invention in the measurement state.

[0014] In the diagram, 1. base, 2. stop block, 3. slide rail, 4. slider, 5. clamping frame, 6. dial indicator, 7. limit block, 8. locking screw, 9. limit screw, 10. back plate, 11. conical part. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Reference Figure 1 , Figure 2 The structure of this utility model is as follows: it includes a base 1, the upper surface of which is set with a V-shaped groove, which is a flat-bottomed structure. An L-shaped stop block 2 is vertically fixedly installed at one end of the V-shaped groove of the base 1. A back plate 10 is fixed to the back of the base 1. The base 1, the back plate 10 and the stop block 2 are fixed as one unit. A horizontal slide rail 3 is longitudinally arranged on the upper surface of the back plate 10. A slider 4 is slidably mounted on the slide rail 3. The inner surface of the stop block 2 serves as the limit limit of one end of the slide rail 3. A limit block 7 is also provided on the upper surface of the other end of the slide rail 3. The limit block 7 is fixedly installed on the upper surface of the slide rail 3 by a limit screw 9. A clamping frame 5 is installed on the slider 4. A dial indicator 6 is clamped in the cantilever opening of the clamping frame 5. The cantilever opening of the clamping frame 5 is fastened by a locking screw 8 to clamp the fixed head of the dial indicator 6.

[0017] Multiple screw holes are longitudinally opened on the upper surface of the slide rail 3 to facilitate the adjustment of the longitudinal movement range of the limit block 7 along the slide rail 3. After the position of the limit block 7 is determined, the limit screw 9 can be tightened to fix the limit block 7 on the slide rail 3.

[0018] The cantilever opening of the clamping frame 5 has bolt holes on the side, and the fixing head of the dial indicator 6 is securely clamped and fixed in the cantilever opening by using locking screws 8.

[0019] Reference Figure 3The working process of this utility model is as follows: 1) The device for installing this utility model: First, adjust the distance between the limiting block 7 and the inner surface of the stop block 2 according to the length range that the tapered part 11 needs to be measured, leaving the maximum longitudinal movement distance of the slider 4 (that is, the movement distance of the dial indicator 6). Then, use the limiting screw 9 to fix the limiting block 7 on the slide rail 3.

[0020] Then, install the dial indicator 6 in the cantilever opening of the clamping frame 5, so that the probe at the lower end of the dial indicator 6 slides longitudinally against the flat bottom of the V-groove of the base 1 to ensure that the dial indicator 6 is installed in place. 2) Install the conical part 11 to be tested: The conical part 11 to be measured is placed in the V-groove of the base 1, ensuring that the part of the conical part 11 to be measured is in axial line contact with the flat bottom of the V-groove, and that one end of the measuring section of the conical part 11 is pressed against the inner surface of the stop block 2. If necessary, other auxiliary means are used to press it, ensuring that the conical part 11 will not move longitudinally or rotate during the measurement process.

[0021] 3) Perform measurements on the tapered part 11 and record the measurement data: First, place the probe at the lower end of the dial indicator 6 against the starting measurement position of the tapered part 11 (the inner surface of the stop block 2 or the inner side of the limit block 7 can be selected as the starting position), and then push the clamping frame 5 and the slider 4 along the slide rail 3 to the other end (called the end position), and record the actual readings indicated by the dial indicator 6 at the starting position and the end position. Then, rotate the conical part 11 by 60° or 90° and measure the actual reading indicated by the dial indicator 6 when the conical part 11 is in this state. By doing so, at least 3 sets of actual measurement values ​​of the conical part 11 are obtained.

[0022] 4) Calculate the difference between the readings of the starting position and the ending position in each of the above states, and then calculate the ratio of the reading difference to the moving distance. This is the actual taper of the conical part 11 in one state. Then, calculate the average taper value of several states as the final taper value of the conical part 11.

[0023] Example 1 The object being measured is sample one, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:198.834. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51. Simultaneously, a standard gauge block with a thickness of 24.996mm was placed against the limit block 7 to measure the value at the intermediate point. The measurement results are as follows: First measurement: Place the conical part 11 in the V-groove of the base 1, and move the dial indicator 6 to the far right (left, center, right). Figure 3 With the current position in mind, the rightmost end (that is, when it touches the right limit block 7) is measured to be 19.977. The dial indicator 6 is moved to the middle position and the reading is measured to be 20.104. The dial indicator 6 is moved to the leftmost end (that is, when it touches the baffle 2) and the reading is measured to be 20.204. The taper from the rightmost end to the middle position and from the rightmost end to the leftmost end are calculated and averaged to obtain the actual taper of 1:198.635.

[0024] Second measurement: Rotate the tapered part 11 by a certain angle and place it back in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.979. Move the dial indicator 6 to the middle point and measure the reading as 20.106. Move the dial indicator 6 to the leftmost end and measure the reading as 20.208. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper as 1:197.772.

[0025] Third measurement: The conical part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.975. The dial indicator 6 was moved to the middle point and the reading was 20.104. The dial indicator 6 was moved to the leftmost end and the reading was 20.203. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:196.643.

[0026] The average of the three measurements was taken, and the final taper of the part was 1:197.680, which has only a 0.58% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0027] Example 2 The measurement object is sample two, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:201.946. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51 mm. Simultaneously, a standard gauge block with a thickness of 24.996 mm was placed against the limit block 7 to measure the value at intermediate points. The measurement results are as follows: First measurement: Place the tapered part 11 in the V-groove of the base 1, move the dial indicator 6 to the rightmost end and measure the reading as 19.984, move the dial indicator 6 to the middle point and measure the reading as 20.110, move the dial indicator 6 to the leftmost end and measure the reading as 20.213. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper as 1:198.557.

[0028] Second measurement: Rotate the tapered part 11 back to a certain angle and place it in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.986. Move the dial indicator 6 to the middle point and measure the reading as 20.109. Move the dial indicator 6 to the leftmost end and measure the reading as 20.215. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:200.952.

[0029] Third measurement: The tapered part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.985. The dial indicator 6 was moved to the middle point and the reading was 20.107. The dial indicator 6 was moved to the leftmost end and the reading was 20.210. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:203.568.

[0030] The average of the three measurements was taken, and the final measured taper of the part was 1:201.005, which has only a 0.47% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0031] Example 3 The object being measured is sample three, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:196.065. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51 mm. Simultaneously, a standard gauge block with a thickness of 24.996 mm was placed against the limit block 7 to measure the value at intermediate points. The measurement results are as follows: First measurement: Place the tapered part 11 in the V-groove of the base 1, move the dial indicator 6 to the rightmost end and measure the reading as 19.975, move the dial indicator 6 to the middle point and measure the reading as 20.102, move the dial indicator 6 to the leftmost end and measure the reading as 20.205. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:197.343.

[0032] Second measurement: Rotate the tapered part 11 back to a certain angle and place it in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.977. Move the dial indicator 6 to the middle point and measure the reading as 20.105. Move the dial indicator 6 to the leftmost end and measure the reading as 20.207. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:196.567.

[0033] Third measurement: The conical part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.980. The dial indicator 6 was moved to the middle point and the reading was 20.107. The dial indicator 6 was moved to the leftmost end and the reading was 20.210. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:197.343.

[0034] The average of the three measurements was taken, and the final measured taper of the part was 1:197.084, which has only a 0.52% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0035] Example 4 The object being measured is sample four, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:197.664. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51 mm. Simultaneously, a standard gauge block with a thickness of 24.996 mm was placed against the limit block 7 to measure the value at intermediate points. The measurement results are as follows: First measurement: Place the tapered part 11 in the V-groove of the base 1, move the dial indicator 6 to the rightmost end and measure the reading as 19.982, move the dial indicator 6 to the middle point and measure the reading as 20.112, move the dial indicator 6 to the leftmost end and measure the reading as 20.211. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:195.452.

[0036] Second measurement: Rotate the tapered part 11 back to a certain angle and place it in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.985. Move the dial indicator 6 to the middle point and measure the reading as 20.113. Move the dial indicator 6 to the leftmost end and measure the reading as 20.213. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:197.420.

[0037] Third measurement: The conical part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.981. The dial indicator 6 was moved to the middle point and the reading was 20.110. The dial indicator 6 was moved to the leftmost end and the reading was 20.214. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:194.542.

[0038] The average of the three measurements was taken, and the final measured taper of the part was 1:195.797, which has only a 0.94% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0039] Example 5 The object being measured is sample five, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:196.935. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51 mm. Simultaneously, a standard gauge block with a thickness of 24.996 mm was placed against the limit block 7 to measure the value at intermediate points. The measurement results are as follows: First measurement: Place the tapered part 11 in the V-groove of the base 1, move the dial indicator 6 to the rightmost end and measure the reading 19.982, move the dial indicator 6 to the middle point and measure the reading 20.111, move the dial indicator 6 to the leftmost end and measure the reading 20.211. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:196.219.

[0040] Second measurement: Rotate the tapered part 11 back to a certain angle and place it in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.985. Move the dial indicator 6 to the middle point and measure the reading as 20.114. Move the dial indicator 6 to the leftmost end and measure the reading as 20.215. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:195.797.

[0041] Third measurement: The conical part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.987. The dial indicator 6 was moved to the middle point and the reading was 20.115. The dial indicator 6 was moved to the leftmost end and the reading was 20.217. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:196.567.

[0042] The average of the three measurements was taken, and the final measured taper of the part was 1:196.194, which has only a 0.38% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0043] Example 6 The object being measured is sample six, with a theoretical taper of 1:200. The actual taper measured using a high-precision image measuring instrument is 1:191.284. The aforementioned structure and measurement method of this utility model are as follows: After installing and adjusting the limit block 7, the actual measured maximum longitudinal movement distance of the dial indicator 6 was 45.51 mm. Simultaneously, a standard gauge block with a thickness of 24.996 mm was placed against the limit block 7 to measure the value at intermediate points. The measurement results are as follows: First measurement: Place the tapered part 11 in the V-groove of the base 1, move the dial indicator 6 to the rightmost end and measure the reading as 19.962, move the dial indicator 6 to the middle point and measure the reading as 20.092, move the dial indicator 6 to the leftmost end and measure the reading as 20.195. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:193.787.

[0044] Second measurement: Rotate the tapered part 11 back to a certain angle and place it in the V-groove of the base 1. Move the dial indicator 6 to the rightmost end and measure the reading as 19.970. Move the dial indicator 6 to the middle point and measure the reading as 20.101. Move the dial indicator 6 to the leftmost end and measure the reading as 20.205. Calculate the taper from the rightmost end to the middle point and from the rightmost end to the leftmost end and take the average value to obtain the actual taper of this measurement as 1:192.224.

[0045] Third measurement: The conical part 11 was rotated at a certain angle and placed in the V-groove of the base 1. The dial indicator 6 was moved to the rightmost end and the reading was 19.966. The dial indicator 6 was moved to the middle point and the reading was 20.095. The dial indicator 6 was moved to the leftmost end and the reading was 20.203. The taper from the rightmost end to the middle point and from the rightmost end to the leftmost end was calculated and averaged to obtain the actual taper of 1:192.892.

[0046] The average of the three measurements was taken, and the final measured taper of the part was 1:192.966, which has only a 0.88% deviation from the result measured by the high-precision image measuring instrument, thus meeting the on-site measurement requirements.

[0047] In summary, the tooling of this utility model is easy to use and can quickly and accurately measure the taper of small rotating parts on site, eliminating the dependence on high-precision measuring instruments for small tapered parts 11, reducing the number of times parts need to be turned over due to measurement, improving work efficiency and quality, and has significant promotional value.

Claims

1. A portable inspection fixture for measuring the taper of small rotating parts, characterized in that: Includes a base (1), the upper surface of the base (1) is set with a V-groove, a stop block (2) is vertically fixed at one end of the V-groove of the base (1), and a back plate (10) is fixed on the back of the base (1); a horizontal slide rail (3) is longitudinally set on the upper surface of the back plate (10), a slider (4) is slidably mounted on the slide rail (3), the inner surface of the stop block (2) serves as the limit limit of one end of the slide rail (3), and a limit block (7) is set on the upper surface of the other end of the slide rail (3); a clamping frame (5) is installed on the slider (4), and a dial indicator (6) is clamped in the cantilever opening of the clamping frame (5).

2. The portable inspection fixture for measuring the taper of small rotating parts according to claim 1, characterized in that, The V-groove has a flat bottom structure.

3. The portable inspection fixture for measuring the taper of small rotating parts according to claim 1, characterized in that, The slide rail (3) has multiple screw holes on its upper surface in the longitudinal direction for installing limit screws (9).

4. The portable inspection fixture for measuring the taper of small rotating parts according to claim 3, characterized in that, The limiting block (7) is fixedly installed on the upper surface of the slide rail (3) by the limiting screw (9).

5. The portable inspection fixture for measuring the taper of small rotating parts according to claim 1, characterized in that, The cantilever opening of the clamping frame (5) has bolt holes in the transverse direction for installing locking screws (8).

6. The portable inspection fixture for measuring the taper of small rotating parts according to claim 5, characterized in that, The cantilever opening of the clamping frame (5) is fastened by locking screws (8).

7. The portable inspection fixture for measuring the taper of small rotating parts according to claim 1, characterized in that, The stop block (2) is L-shaped.

8. The portable inspection fixture for measuring the taper of small rotating parts according to claim 1, characterized in that, It also includes standard gauge blocks, which are used to fit closely to the limit block (7) when measuring the midpoint.

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