An auxiliary positioning device and method for a two-dimensional image measuring instrument

Abstract

This invention relates to the field of 2D image measuring instruments, specifically disclosing an auxiliary positioning device and method for a 2D image measuring instrument. The device includes a base, a support column, and a scanner. The scanner is used to scan and measure the part to be measured. It also includes a sliding seat slidably mounted on the upper part of the base; a lifting plate disposed in the middle of the sliding seat; and two clamping blocks mounted on the top of the lifting plate, symmetrically arranged at two diagonal positions on the lifting plate. By setting a liftable rotating plate, and generating negative pressure at the top of the rotating plate, the part to be measured can be attracted and held when placed on the rotating plate. Furthermore, because the rotating plate moves upwards by a certain distance, the two clamping blocks can easily clamp the part to be measured. Compared to existing technologies that clamp on a flat surface, this method is more effective when clamping thinner parts.

Description

Technical Field

[0001] This invention relates to the field of two-dimensional image measuring instruments, and in particular to an auxiliary positioning device and method for two-dimensional image measuring instruments. Background Technology

[0002] The working principle of a 2D image measuring instrument is mainly based on CCD digital imaging and computer graphics technology. First, the instrument uses an optical microscope to perform high-magnification optical magnification imaging of the object being measured. Then, a high-resolution CCD (charge-coupled device) camera system captures the magnified image of the object. Based on this image, the instrument's software uses algorithms to measure parameters such as the object's size, shape, and angles. The software also precisely compensates for errors between the worktable and the optical ruler to ensure the accuracy of the measurement results. After measurement, the software generates a graphic on the screen for the operator to compare with the image, allowing for a direct visual identification of any potential deviations. The software also supports annotation functions, enabling the annotation and output of measurement results.

[0003] Auxiliary positioning devices can help 2D image measuring instruments to more accurately position the object being measured, thereby reducing measurement errors. For example, turntables and accessories (including indexing tables, single-axis turntables, universal turntables, and CNC turntables) add a degree of freedom of rotational movement to the image measuring instrument, facilitating the measurement of certain types of parts and ensuring the accuracy of measurement results. Since the measuring table of a 2D image measuring instrument is a plane, the part needs to be clamped when measuring different angles of the part. However, in existing technology, the part is placed directly on the surface of the measuring table.

[0004] For example, the auxiliary positioning fixture for a two-dimensional image measuring instrument disclosed in prior art publication number CN221725250U adopts this direct clamping method. This technology mainly includes a body, with support rods fixedly connected to both sides of the body. Side baffles are connected to the surface of the support rods by screw threads. One end of one side baffle is provided with an adjustment post, and a blocking rod is rotatably connected to the surface of the adjustment post. A blocking mechanism is provided on the surface of the blocking rod. The top of the other side baffle is provided with an inverted T-shaped adjustment groove. An L-shaped stabilizing rod is slidably connected inside the adjustment groove. A fixing mechanism is provided between the stabilizing rod and the adjustment groove.

[0005] Since the parts to be measured are usually flat, it is difficult to clamp them when changing their angle because they are attached to the surface of the measuring table. Therefore, the auxiliary positioning mechanism needs to be improved. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] This invention provides an auxiliary positioning device and method for a two-dimensional image measuring instrument, which can solve the problem that parts are not easily clamped on the measuring table. The specific solution is as follows:

[0008] On one hand, the present invention provides an auxiliary positioning device for a two-dimensional image measuring instrument, comprising a base, a support column, and a scanner, wherein the scanner is used to scan and measure the part to be measured, and further includes:

[0009] A sliding seat, which is slidably mounted on the upper part of the base;

[0010] A lifting plate, wherein the lifting plate is disposed in the middle of the sliding seat;

[0011] A clamping block is installed on the top of the lifting plate, and there are two clamping blocks. The two clamping blocks are symmetrically arranged at two diagonal positions of the lifting plate. When the two clamping blocks are close to each other, they can clamp the two corners of the part to be tested.

[0012] The two clamping blocks can rise synchronously, move closer to each other, and move further apart from each other, and the two clamping blocks can drive the part under test to rotate.

[0013] Preferably, the two ends of the base are fixedly connected to slide rails, the two ends of the slide rails extend to the front and rear ends of the base, and the bottom of the sliding seat is fixedly connected to a sliding sleeve, which is slidably connected to the slide rails. When the sliding seat slides to the limit position toward the support column, the middle part of the sliding seat is directly below the scanner, so that the part to be measured on the sliding seat is scanned by the scanner, thereby realizing the measurement of the part to be measured.

[0014] Preferred options also include:

[0015] The rack is fixedly connected to the bottom of the sliding sleeve at one end of the sliding seat;

[0016] The first motor is fixedly installed at one end of the base, and the first motor is installed below the rack;

[0017] The first gear is fixedly connected to the output end of the first motor. The first gear meshes with the rack. When the first motor starts, it can drive the first gear to rotate, thereby causing the first gear to drive the rack to translate, thereby causing the sliding seat to move along the direction of the slide rail.

[0018] A groove is formed at one end of the base, and when the sliding base slides to directly below the scanner, the groove corresponds to the position of the sliding base.

[0019] Preferred options also include:

[0020] The sliding seat has a through groove in the middle that corresponds to the lifting plate. The through groove corresponds to the shape and size of the lifting plate. The part to be tested is placed above the lifting plate.

[0021] Telescopic components are installed at both ends of the lifting plate to drive the lifting plate to move up and down along the vertical direction of the sliding seat. Limiting sliders are fixedly connected to both ends of the lifting plate. A limiting groove is opened in the inner wall of the groove. The limiting slider is slidably connected to the limiting groove. The upper and lower ends of the telescopic component are respectively connected to the top of the inner wall of the limiting groove and the top of the limiting slider.

[0022] Preferred options also include:

[0023] A rotating plate is installed at the middle of the top of the lifting plate. The rotating plate can rotate at the middle of the top of the lifting plate. A connecting hole is provided around the rotating plate, and the two ends of the connecting hole pass through the top and the side of the rotating plate, respectively.

[0024] A rotating groove is formed at the top center of the lifting plate, the rotating plate rotates within the rotating groove, and there is a gap between the circumference of the rotating plate and the inner wall of the rotating groove.

[0025] Preferred options also include:

[0026] A negative pressure channel is formed on the inner wall of the rotating groove, and the other end of the negative pressure channel extends to the bottom of the lifting plate;

[0027] An air pump is fixedly installed at the bottom of the lifting plate;

[0028] A positive pressure channel is formed at the bottom of the inner wall of the rotating groove, and the other end of the positive pressure channel extends to the bottom of the lifting plate;

[0029] An exhaust channel is formed at the bottom of the inner wall of the rotating groove, and the other end of the exhaust channel extends to the bottom of the lifting plate. The inner diameter of the exhaust channel is smaller than the inner diameter of the positive pressure channel.

[0030] The third motor is fixedly installed at the bottom of the lifting plate. The top output shaft of the third motor is connected to a drive sleeve. The bottom of the rotating plate is fixedly connected to a drive column. The shape of the drive column matches that of the drive sleeve. The outer wall of the drive column and the inner wall of the drive sleeve are provided with a limiting structure that can interlock with each other at corresponding positions.

[0031] Preferred options also include:

[0032] A sealing ring is fixedly connected to the bottom of the rotating plate. The periphery of the sealing ring is slidably connected to the inner wall of the rotating groove. An annular sealing cavity is formed between the top of the sealing ring, the side of the rotating plate, and the inner wall of the rotating groove. The connecting hole communicates with the sealing cavity, and one end of the negative pressure channel communicates with the sealing cavity.

[0033] A limiting post is fixedly connected to the inner wall of the rotating groove, and the limiting post is positioned directly above the sealing ring;

[0034] The air pump's negative pressure port is connected to the negative pressure channel, and its positive pressure port is connected to the positive pressure channel. When the air pump is started, it generates negative pressure in the negative pressure channel and positive pressure in the positive pressure channel.

[0035] Preferably, a sliding sleeve is fixedly connected to one end of the clamping block, and a sliding cavity is provided inside the sliding sleeve;

[0036] A sealing column is slidably installed inside the sliding sleeve. When air pressure is generated in the sliding cavity, the sliding sleeve and the sealing column can be driven to slide against each other under the influence of the air pressure.

[0037] An air injection tube is connected to one end of the sliding sleeve, and the interior of the air injection tube communicates with the interior of the sliding cavity.

[0038] A high-pressure pump is installed on top of the sliding seat. The negative pressure end of the high-pressure pump is connected to a negative pressure pipe, and the other end of the negative pressure pipe is fixedly connected to the top of the air injection pipe.

[0039] The lifting block is fixedly connected to the end of the sealing column away from the sliding sleeve.

[0040] The sliding frame has two parts, which are respectively installed at one end of the two clamping blocks. The bottoms of the two sliding frames are fixedly connected to the two diagonal positions of the lifting plate. The lifting block is slidably connected to the sliding frame.

[0041] An electric telescopic rod is provided, with its upper and lower ends connected to the top of the inner wall of the sliding frame and the top of the lifting block, respectively. The electric telescopic rod can drive the lifting block to slide up and down within the sliding frame.

[0042] Preferred options also include:

[0043] Pressure relief valve, which is fixedly connected to the outer wall of the sliding sleeve;

[0044] The second gear is connected to the middle of the sealing column;

[0045] The third gear is rotatably connected to the side wall of the sliding sleeve;

[0046] The second motor is fixedly installed on the outer wall of the sliding sleeve;

[0047] The fourth gear is fixedly connected to the end of the output shaft of the second motor. The fourth gear meshes with the third gear, and the third gear meshes with the second gear.

[0048] On the other hand, the present invention provides an auxiliary positioning method for a two-dimensional image measuring instrument, comprising the following steps:

[0049] S1. Slide the sliding block to the top of the base away from the support column, and then raise the lifting plate;

[0050] S2. Place the part to be tested on the lifting plate in S;

[0051] S3. The scanner measures the front side of the part to be tested;

[0052] S4. The two clamping blocks move closer to each other to clamp the part to be tested, and the two clamping blocks move upward to leave enough space for the part to be tested to rotate.

[0053] S5. When it is necessary to measure the side of the part to be measured, the two clamping blocks rotate 90 degrees at the same time so that the side of the part to be measured faces upward.

[0054] S6. The scanner measures the side of the part to be tested.

[0055] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0056] 1. By setting two clamping blocks, which are respectively positioned diagonally on the lifting plate, the parts to be measured can be clamped by the clamping blocks when they need to be inspected, preventing the parts from shifting when being measured by the scanner, thus ensuring the accuracy of the measurement results.

[0057] 2. By setting up a lifting plate and a movable sliding seat, when it is necessary to place and measure the part to be measured, the position of the sliding seat can be moved. When it is moved away from the support column, it is convenient to place the part to be measured. When it is moved closer to the support column, the scanner can scan and measure the part to be measured.

[0058] 3. By rotating the two clamping blocks synchronously, and because the clamping blocks hold the part to be measured, the angle of the part to be measured can be rotated, so that the side of the part to be measured can be recognized by the scanner.

[0059] 4. By setting up a height-adjustable rotating plate, and the top of the rotating plate can generate negative pressure, the part to be tested can be attracted when it is placed on the rotating plate. Since the rotating plate moves upward by a certain distance, it is convenient for the two clamping blocks to clamp the part to be tested. Compared with the existing technology of clamping on a flat surface, it is more effective when clamping thinner parts.

[0060] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0061] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0062] Figure 1 This is a three-dimensional view of the measurement state of the present invention;

[0063] Figure 2 This is a three-dimensional view of the state in which the part to be tested is placed according to the present invention;

[0064] Figure 3 This is a structural diagram of the base and sliding seat of the present invention;

[0065] Figure 4 This is a perspective view of the sliding seat of the present invention;

[0066] Figure 5 This is a cross-sectional view of the present invention;

[0067] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0068] Figure 7 This is a perspective view of the rotating plate of the present invention;

[0069] Figure 8 This is a schematic diagram showing the changing states of the lifting plate of the present invention;

[0070] Figure 9 This is a perspective view of the lifting plate of the present invention;

[0071] Figure 10 This is a partial perspective view of the clamping block of the present invention;

[0072] Figure 11 This is a perspective view of the clamping block and high-pressure pump of the present invention.

[0073] The reference numerals in the attached figures are as follows:

[0074] 101. Base; 102. Support column; 103. Support foot; 104. Sliding seat; 105. Slide rail; 106. Lifting plate; 107. Sliding sleeve; 108. Rack; 109. First motor; 110. First gear; 111. Scanner; 112. Through groove; 113. Limiting slide groove; 114. Limiting slider; 115. Telescopic component; 116. Groove; 200. Part to be tested; 301. Clamping block; 302. Sliding sleeve; 303. Sliding cavity; 304. Sealing column; 305. Air injection pipe; 306. Pressure relief valve; 3 07. Second gear; 308. Lifting block; 309. Electric telescopic rod; 310. Third gear; 311. Fourth gear; 312. Second motor; 313. Negative pressure pipe; 314. High pressure pump; 315. Rotating plate; 316. Rotating groove; 317. Sliding groove; 318. Connecting hole; 319. Negative pressure channel; 320. Air pump; 321. Positive pressure channel; 322. Exhaust channel; 323. Third motor; 324. Limiting post; 325. Sealing ring; 326. Drive post; 327. Drive sleeve; 328. Sliding frame. Detailed Implementation

[0075] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0076] Example 1, as Figure 1 , Figure 2 As shown, this embodiment provides an auxiliary positioning device for a two-dimensional image measuring instrument, comprising:

[0077] The base 101 has four support feet 103 fixedly installed at its bottom. The bottom of the four support feet 103 is equipped with suction cups, which allow the support feet 103 and the base 101 to be stably installed on the ground or workbench.

[0078] Support column 102 is fixedly connected to one end of base 101;

[0079] Scanner 111 is fixedly installed on the top of support column 102, with the scanning end of scanner 111 facing directly downwards;

[0080] like Figure 3 , Figure 4The sliding seat 104 shown is slidably mounted on the upper part of the base 101. The two ends of the base 101 are fixedly connected to the slide rails 105, which extend to the front and rear ends of the base 101. The bottom of the sliding seat 104 is fixedly connected to the sliding sleeve 107, which is slidably connected to the slide rails 105. When the sliding seat 104 slides to the extreme position toward the support column 102, the middle part of the sliding seat 104 is directly below the scanner 111, so that the part to be measured 200 on the sliding seat 104 is scanned by the scanner 111, thereby realizing the measurement of the part to be measured 200.

[0081] The rack 108 is fixedly connected to the bottom of the sleeve 107 at one end of the sliding seat 104;

[0082] The first motor 109 is fixedly installed at one end of the base 101, and the first motor 109 is installed below the rack 108;

[0083] The first gear 110 is fixedly connected to the output end of the first motor 109. The first gear 110 meshes with the rack 108. When the first motor 109 starts, it drives the first gear 110 to rotate, thereby causing the first gear 110 to drive the rack 108 to translate, which in turn drives the sliding seat 104 to move along the slide rail 105. This facilitates the placement of the part to be measured 200 and the movement of the part to be measured 200 below the scanner 111 for two-dimensional image recognition and measurement. Figure 1 This is a diagram showing the state when the slider is below the scanner 111. Figure 2 This is a diagram showing the state when the slider is away from the bottom of scanner 111.

[0084] The groove 116 is formed at one end of the base 101. When the sliding seat 104 slides to the position directly below the scanner 111, the groove 116 corresponds to the position of the sliding seat 104.

[0085] The lifting plate 106 is located in the middle of the sliding seat 104. The middle of the sliding seat 104 is provided with a through groove 112 corresponding to the lifting plate 106. The through groove 112 corresponds to the shape and size of the lifting plate 106. The part to be tested 200 is placed above the lifting plate 106.

[0086] like Figure 5 The telescopic component 115 shown is installed at both ends of the lifting plate 106 and is used to drive the lifting plate 106 to move up and down along the vertical line of the sliding seat 104. The two ends of the lifting plate are fixedly connected to the limit slider 114. The inner wall of the groove 116 is provided with the limit groove 113. The limit slider 114 is slidably connected to the limit groove 113. The upper and lower ends of the telescopic component 115 are respectively connected to the top of the inner wall of the limit groove 113 and the top of the limit slider 114.

[0087] It should be noted that the telescopic component 115 can be a pneumatic telescopic rod, a hydraulic telescopic rod, or a linear motor, thereby achieving the effect of driving the lifting plate 106 to move up and down;

[0088] In the above scheme, the lifting plate 106 is first lowered to its lowest point, then the sliding seat 104 is slid to the top of the base 101 away from the support column 102, and then the part to be measured 200 is placed on top of the lifting plate 106. Then the sliding seat 104 is slid to the top of the base 101 near the support column 102, so that the part to be measured 200 is directly below the scanner 111. Then the lifting plate 106 is lowered to its lowest point, so that the groove 116 protects the part to be measured 200 on top of the lifting plate 106, preventing it from being touched by objects and affected by wind direction, thus affecting the measurement results.

[0089] like Figure 6 , Figure 7 As shown, an auxiliary positioning device for a two-dimensional image measuring instrument further includes:

[0090] A rotating plate 315 is installed in the middle of the top of the lifting plate 106. The rotating plate 315 can rotate in the middle of the top of the lifting plate 106. A connecting hole 318 is provided around the rotating plate 315. The two ends of the connecting hole 318 pass through the top of the rotating plate 315 and the side of the rotating plate 315, respectively.

[0091] A rotating groove 316 is formed in the top center of the lifting plate 106. The rotating plate 315 rotates in the rotating groove 316. There is a gap between the circumference of the rotating plate 315 and the inner wall of the rotating groove 316.

[0092] The negative pressure channel 319 is opened on the inner wall of the rotating groove 316, and the other end of the negative pressure channel 319 extends to the bottom of the lifting plate 106.

[0093] Air pump 320 is fixedly installed at the bottom of lifting plate 106;

[0094] A positive pressure channel 321 is formed at the bottom of the inner wall of the rotating groove 316, and the other end of the positive pressure channel 321 extends to the bottom of the lifting plate 106;

[0095] The exhaust passage 322 is located at the bottom of the inner wall of the rotating groove 316, and the other end of the exhaust passage 322 extends to the bottom of the lifting plate 106. The inner diameter of the exhaust passage 322 is smaller than the inner diameter of the positive pressure passage 321.

[0096] The third motor 323 is fixedly installed at the bottom of the lifting plate 106. The top output shaft of the third motor 323 is connected to the drive sleeve 327. The bottom of the rotating plate 315 is fixedly connected to the drive column 326. The drive column 326 and the drive sleeve 327 are matched in shape. The outer wall of the drive column 326 and the inner wall of the drive sleeve 327 are provided with a limiting structure that can interlock with each other, so that the drive column 326 cannot rotate relative to the drive sleeve 327, and the two can only rotate synchronously.

[0097] A sealing ring 325 is fixedly connected to the bottom of the rotating plate 315. The periphery of the sealing ring 325 is slidably connected to the inner wall of the rotating groove 316. An annular sealing cavity is formed between the top of the sealing ring 325, the side of the rotating plate 315, and the inner wall of the rotating groove 316. The connecting hole 318 communicates with the sealing cavity, and one end of the negative pressure channel 319 communicates with the sealing cavity.

[0098] The limiting post 324 is fixedly connected to the inner wall of the rotating groove 316, and the limiting post 324 is positioned directly above the sealing ring 325;

[0099] In the above scheme, the negative pressure port of the air pump 320 is connected to the negative pressure channel 319, and the positive pressure port of the air pump 320 is connected to the positive pressure channel 321. When the air pump 320 is started, negative pressure is generated in the negative pressure channel 319 and positive pressure is generated in the positive pressure channel 321.

[0100] When negative pressure is generated in the negative pressure channel 319, negative pressure is also generated in the sealing cavity and the connecting hole 318, so that the part to be tested 200 placed on the top of the rotating plate 315 can be adsorbed on the top of the rotating plate 315 under the action of negative pressure.

[0101] When positive pressure is generated in the positive pressure channel 321, the rotating plate 315 is pushed upward under the action of gas compression. Under the action of the limiting post 324, the rising range of the rotating plate 315 is limited to a certain height, thereby preventing the rotating plate 315 from separating from the rotating groove 316. Excess gas pressure can be released by setting the exhaust channel 322.

[0102] The above method first lifts the rotating plate 315 upward, thereby driving the part to be tested 200 to move upward, so that a gap is formed between the bottom of the part to be tested 200 and the top surface of the lifting plate 106. Then, the negative pressure generated by the rotating plate 315 sucks the rotating plate 315 in place. Finally, the third motor 323 drives the rotating plate 315 to rotate, thereby driving the part to be tested 200 to rotate, rotating the part to be tested 200 to a specific angle.

[0103] like Figure 8 , Figure 9 , Figure 10 , Figure 11As shown, an auxiliary positioning device for a two-dimensional image measuring instrument further includes:

[0104] Clamping blocks 301 are installed on the top of the lifting plate 106, and there are two clamping blocks 301. The two clamping blocks 301 are symmetrically arranged at two diagonal positions of the lifting plate 106. When the two clamping blocks 301 approach each other, they can clamp the two corners of the part to be tested 200. The clamping blocks 301 are V-shaped. The part to be tested 200 can be clamped by the two clamping blocks 301 arranged diagonally.

[0105] A sliding groove 317 is formed on the top of the lifting plate 106, and the clamping block 301 slides inside the sliding groove 317;

[0106] It should be noted that when the two clamping blocks 301 clamp the part to be tested 200, the part to be tested 200 needs to be rotated to a specific angle so that the two corners of the part to be tested 200 can correspond to the positions of the two clamping blocks 301 respectively. Then, by bringing the two clamping blocks 301 closer to each other, the part to be tested is clamped.

[0107] As a means of driving the clamping block 301, the following components may be included:

[0108] A sliding sleeve 302 is fixedly connected to one end of a clamping block 301, and a sliding cavity 303 is provided inside the sliding sleeve 302.

[0109] The sealing column 304 is slidably installed inside the sliding sleeve 302. When air pressure is generated in the sliding cavity 303, the sliding sleeve 302 and the sealing column 304 can slide against each other under the action of the air pressure.

[0110] Air injection tube 305 is connected to one end of sliding sleeve 302, and the interior of air injection tube 305 is connected to the interior of sliding cavity 303;

[0111] A high-pressure pump 314 is installed on the top of the sliding seat 104. The negative pressure end of the high-pressure pump 314 is connected to a negative pressure pipe 313. The other end of the negative pressure pipe 313 is fixedly connected to the top of the air injection pipe 305. The inside of the negative pressure pipe 313 is connected to the inside of the air injection pipe 305. When the high-pressure pump 314 is working, it can inject gas into the inside of the sliding cavity 303, so that high pressure is generated inside the sliding cavity 303. The high pressure can cause the sliding sleeve 302 and the sealing column 304 to move away from each other, thereby allowing the two clamping blocks 301 to move closer to each other and clamp the part to be measured 200, thereby preventing the part to be measured 200 from shifting during the measurement process and affecting the measurement results.

[0112] The lifting block 308 is fixedly connected to the end of the sealing column 304 away from the sliding sleeve 302;

[0113] There are two sliding frames 328, which are respectively installed at one end of two clamping blocks 301. The bottoms of the two sliding frames 328 are fixedly connected to the two diagonal positions of the lifting plate 106. The lifting block 308 is slidably connected to the sliding frame 328.

[0114] The electric telescopic rod 309 has its upper and lower ends connected to the top of the inner wall of the sliding frame 328 and the top of the lifting block 308, respectively. The electric telescopic rod 309 can drive the lifting block 308 to slide up and down inside the sliding frame 328.

[0115] Pressure relief valve 306 is fixedly connected to the outer wall of sliding sleeve 302. Pressure relief valve 306 is adjustable. Through the adjustable pressure relief valve 306, the air pressure inside sliding cavity 303 can be adjusted according to the clamping force required by the test part 200 of different specifications. This allows the clamping block 301 to adjust the pressure applied to the test part 200, thereby preventing the clamping block 301 from squeezing and deforming the test part 200.

[0116] The second gear 307 is connected to the middle of the sealing post 304;

[0117] The third gear 310 is rotatably connected to the side wall of the sliding sleeve 302;

[0118] The second motor 312 is fixedly installed on the outer wall of the sliding sleeve 302;

[0119] The fourth gear 311 is fixedly connected to the end of the output shaft of the second motor 312. The fourth gear 311 meshes with the third gear 310, and the third gear 310 meshes with the second gear 307.

[0120] In the above scheme, when the second motor 312 starts, the fourth gear 311 starts to rotate. Since the fourth gear 311 meshes with the third gear 310, and the third gear 310 meshes with the second gear 307, when the second motor 312 starts, the second motor 312 and the sliding sleeve 302 can rotate around the sealing column 304, thereby causing the entire sliding sleeve 302 and the clamping block 301 to rotate, thereby driving the part to be measured 200 to rotate, so that the scanner 111 can measure the dimension of the part to be measured 200 in another direction.

[0121] Example 2: This example differs from Example 1 in that it provides an auxiliary positioning method for a two-dimensional image measuring instrument, comprising the following steps:

[0122] S1. Slide the sliding seat 104 to the top of the base 101 away from the support column 102, and then raise the lifting plate 106;

[0123] S2. Place the part to be tested 200 on the lifting plate 106 in S1;

[0124] S3. Scanner 111 measures the front side of the part to be measured 200;

[0125] S4. The two clamping blocks 301 move closer to each other to clamp the part to be tested 200, and the two clamping blocks 301 move upward to leave enough space for the part to be tested 200 to rotate.

[0126] S5. When it is necessary to measure the side of the part to be measured 200, the two clamping blocks 301 rotate 90 degrees at the same time so that the side of the part to be measured 200 faces upward.

[0127] S6. Scanner 111 measures the side of the part to be measured 200.

[0128] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0130] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0131] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An auxiliary positioning device for a two-dimensional image measuring instrument, comprising a base (101), a support column (102), and a scanner (111), wherein the scanner (111) is used to scan and measure the part to be measured, characterized in that, Also includes: A sliding seat (104) is slidably mounted on the upper part of the base (101); The lifting plate (106) is located in the middle of the sliding seat (104); Clamping blocks (301) are installed on the top of the lifting plate (106), and there are two clamping blocks (301). The two clamping blocks (301) are symmetrically arranged on the two diagonal positions of the lifting plate (106). When the two clamping blocks (301) approach each other, they can clamp the two corners of the part to be tested. A sliding sleeve (302) is fixedly connected to one end of the clamping block (301), and a sliding cavity (303) is provided inside the sliding sleeve (302). A rotating plate (315) is installed in the middle of the top of the lifting plate (106). The rotating plate (315) can rotate in the middle of the top of the lifting plate (106). A connecting hole (318) is provided around the rotating plate (315). The two ends of the connecting hole (318) pass through the top of the rotating plate (315) and the side of the rotating plate (315) respectively. A rotating groove (316) is formed in the top center of the lifting plate (106), and the rotating plate (315) rotates in the rotating groove (316). There is a gap between the circumference of the rotating plate (315) and the inner wall of the rotating groove (316). The negative pressure channel (319) is opened on the inner wall of the rotating groove (316), and the other end of the negative pressure channel (319) extends to the bottom of the lifting plate (106); An air pump (320) is fixedly installed at the bottom of the lifting plate (106); A positive pressure channel (321) is opened at the bottom of the inner wall of the rotating groove (316), and the other end of the positive pressure channel (321) extends to the bottom of the lifting plate (106); An exhaust passage (322) is opened at the bottom of the inner wall of the rotating groove (316), and the other end of the exhaust passage (322) extends to the bottom of the lifting plate (106). The inner diameter of the exhaust passage (322) is smaller than the inner diameter of the positive pressure passage (321). The third motor (323) is fixedly installed at the bottom of the lifting plate (106). The top output shaft of the third motor (323) is connected to the drive sleeve (327). The bottom of the rotating plate (315) is fixedly connected to the drive column (326). The shape of the drive column (326) matches that of the drive sleeve (327). The outer wall of the drive column (326) and the inner wall of the drive sleeve (327) are provided with a limiting structure that can interlock with each other at the corresponding positions. A sealing ring (325) is fixedly connected to the bottom of the rotating plate (315). The sealing ring (325) is slidably connected to the inner wall of the rotating groove (316) around its periphery. An annular sealing cavity is formed between the top of the sealing ring (325), the side of the rotating plate (315), and the inner wall of the rotating groove (316). The connecting hole (318) is connected to the sealing cavity, and one end of the negative pressure channel (319) is connected to the sealing cavity. The limiting post (324) is fixedly connected to the inner wall of the rotating groove (316), and the limiting post (324) is positioned directly above the sealing ring (325); The negative pressure port of the air pump (320) is connected to the negative pressure channel (319), and the positive pressure port of the air pump (320) is connected to the positive pressure channel (321). When the air pump (320) is started, negative pressure is generated in the negative pressure channel (319) and positive pressure is generated in the positive pressure channel (321). By setting a liftable rotating plate (315), and the top of the rotating plate (315) can generate negative pressure, when the part to be tested is placed on the rotating plate (315), the part to be tested can be attracted and held. Since the rotating plate (315) moves upward by one distance, the two clamping blocks (301) can clamp the part to be tested. When negative pressure is generated in the negative pressure channel (319), negative pressure is also generated in the sealing cavity and the connecting hole (318), so that the part to be tested placed on the top of the rotating plate (315) is adsorbed on the top of the rotating plate (315) under the action of negative pressure; When positive pressure is generated in the positive pressure channel (321), the rotating plate (315) is pushed upward under the action of gas compression, and under the action of the limiting post (324), the rising range of the rotating plate (315) is limited to a certain height, thereby preventing the rotating plate (315) from separating from the rotating groove (316), and the excess gas pressure is discharged by setting the exhaust channel (322); Among them, the two clamping blocks (301) can rise synchronously, move closer to each other and move further apart, and the two clamping blocks (301) can drive the part to be tested to rotate; When it is necessary to inspect the side of the part to be tested, the two clamping blocks (301) rotate 90 degrees at the same time so that the side of the part to be tested faces upward.

2. The auxiliary positioning device for a two-dimensional image measuring instrument as described in claim 1, characterized in that: The two ends of the base (101) are fixedly connected to the slide rails (105), and the two ends of the slide rails (105) extend to the front and rear ends of the base (101). The bottom of the sliding seat (104) is fixedly connected to the sliding sleeve (107), and the sliding sleeve (107) is slidably connected to the slide rails (105). When the sliding seat (104) slides to the limit position toward the support column (102), the middle part of the sliding seat (104) is directly below the scanner (111), so that the part to be measured on the sliding seat (104) is scanned by the scanner (111), thereby realizing the measurement of the part to be measured.

3. The auxiliary positioning device for a two-dimensional image measuring instrument as described in claim 2, characterized in that: Also includes: The rack (108) is fixedly connected to the bottom of the sleeve (107) at one end of the sliding seat (104); The first motor (109) is fixedly installed at one end of the base (101), and the first motor (109) is installed below the rack (108); The first gear (110) is fixedly connected to the output end of the first motor (109). The first gear (110) meshes with the rack (108). When the first motor (109) starts, it can drive the first gear (110) to rotate, thereby causing the first gear (110) to drive the rack (108) to translate, thereby driving the sliding seat (104) to move along the direction of the slide rail (105). The groove (116) is located at one end of the base (101). When the slide (104) slides to the bottom of the scanner (111), the groove (116) corresponds to the position of the slide (104).

4. The auxiliary positioning device for a two-dimensional image measuring instrument as described in claim 3, characterized in that: Also includes: The sliding seat (104) has a through groove (112) in the middle that corresponds to the lifting plate (106). The through groove (112) corresponds to the shape and size of the lifting plate (106). The part to be tested is placed above the lifting plate (106). The telescopic component (115) is installed at both ends of the lifting plate (106) to drive the lifting plate (106) to move up and down along the vertical line of the sliding seat (104). The two ends of the lifting plate are fixedly connected to the limit slider (114). The inner wall of the groove (116) is provided with the limit groove (113). The limit slider (114) is slidably connected to the limit groove (113). The upper and lower ends of the telescopic component (115) are respectively connected to the top of the inner wall of the limit groove (113) and the top of the limit slider (114).

5. The auxiliary positioning device for a two-dimensional image measuring instrument as described in claim 1, characterized in that: Also includes: The sealing column (304) is installed inside the sliding sleeve (302) for sealing and sliding. When air pressure is generated in the sliding cavity (303), the sliding sleeve (302) and the sealing column (304) can slide against each other under the action of the air pressure. An air injection tube (305) is connected to one end of a sliding sleeve (302), and the interior of the air injection tube (305) is in communication with the interior of the sliding cavity (303); A high-pressure pump (314) is installed on the top of the sliding seat (104). The negative pressure end of the high-pressure pump (314) is connected to a negative pressure pipe (313), and the other end of the negative pressure pipe (313) is fixedly connected to the top of the air injection pipe (305). The lifting block (308) is fixedly connected to the end of the sealing column (304) away from the sliding sleeve (302); Two sliding frames (328) are installed at one end of two clamping blocks (301), and the bottoms of the two sliding frames (328) are fixedly connected to the two diagonal positions of the lifting plate (106). The lifting block (308) is slidably connected to the sliding frame (328). The electric telescopic rod (309) has its upper and lower ends connected to the top of the inner wall of the sliding frame (328) and the top of the lifting block (308), respectively. The electric telescopic rod (309) can drive the lifting block (308) to slide up and down inside the sliding frame (328).

6. The auxiliary positioning device for a two-dimensional image measuring instrument as described in claim 5, characterized in that: It also includes a pressure relief valve (306), which is fixedly connected to the outer wall of the sliding sleeve (302); The second gear (307) is connected to the middle of the sealing column (304); The third gear (310) is rotatably connected to the side wall of the sliding sleeve (302); The second motor (312) is fixedly installed on the outer wall of the sliding sleeve (302); The fourth gear (311) is fixedly connected to the end of the output shaft of the second motor (312). The fourth gear (311) meshes with the third gear (310), and the third gear (310) meshes with the second gear (307).

7. An auxiliary positioning method for a two-dimensional image measuring instrument, employing an auxiliary positioning device for a two-dimensional image measuring instrument as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Slide the sliding seat (104) to the top of the base (101) away from the support column (102), and then raise the lifting plate (106); S2. Place the part to be tested on the lifting plate (106) in S1; S3, Scanner (111) measures the front side of the part to be measured; S4. The two clamping blocks (301) move closer to each other to clamp the part to be tested, and the two clamping blocks (301) move upward to leave enough space for the part to be tested to rotate. S5. When it is necessary to measure the side of the part to be measured, the two clamping blocks (301) rotate 90 degrees at the same time so that the side of the part to be measured faces upward. S6. Scanner (111) measures the side of the part to be measured.

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