Linear guide rail micro-arc height precision measuring device
By designing a high-precision measurement device for microarcs in a linear guide rail, the prototypical convex arc surface is used to fit the arc surface of the raceway, the problems of weight and position difficulty of the three-coordinate measuring instrument are solved, and high-precision online measurement is achieved, reducing cost and time , improves the convenience of testing.
Patent Information
- Application Number
- CN202420556613.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-21
AI Technical Summary
When measuring the race surface of a linear guide rail, the existing three-coordinate measuring instrument is difficult to achieve high-precision measurement due to the weight of the equipment and the difficulty of placement of the position, and it needs to be transported to a special measurement room, resulting in increased cost and safety risks.
A linear guide rail microarc high-precision measurement device was designed, using gantry support frame, micrometer, profiling block and elastic parts to bond the raceway arc surface through profiling convex arc surface, divide the point and fitting process, and reduce the Equipment self-weight and position requirements to realize online measurement.
High-precision measurement of the raceway surface of linear guide rails is realized, reducing measurement costs and time, reducing dependence on the measurement environment, and improving detection convenience and production stability.
Smart Images
Figure CN222144018U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of guide rail production, in particular to a linear guide rail micro-arc high-precision measuring device. Background Art
[0002] The ball linear guide pair is generally composed of a guide rail, a slider, a ball, a return device, a cage, a sealing end cover and a baffle, etc., with the ball rolling between the slider and the guide rail instead of relative contact sliding. When the guide rail and the slider make relative motion, the ball will roll along the raceway on the guide rail that has been hardened by heat treatment and precision grinding. At the end of the slider, the ball enters the return hole through the return device (return device) and then enters the raceway, so that the ball rolls over and over again. Dust-proof sealing end covers are installed at both ends of the return device to effectively prevent dust and chips from entering the inside of the slider.
[0003] The guide rail with raceway is the main component that determines the guiding accuracy and motion performance of the entire guide rail assembly. It is fastened to the fixed parts of the machine tool (such as the bed, columns, etc.) with screws. Its installation bottom surface, positioning side surface and raceway need to be precisely formed and ground to ensure the precise geometric shape of the raceway and the precise dimensional accuracy between the raceway and the installation positioning surface.
[0004] The clearance between the guide rail, slider and ball greatly affects the friction of the slider, the long-term operating accuracy and fatigue life of the guide pair. At the same time, the guide rail raceway and slider raceway that clamp the ball determine the contact angle when the ball rolls. The contact angle greatly affects the various mechanical properties of the linear guide pair, such as the static rated torque.
[0005] During the grinding process of the guide rail, there are extremely high requirements for the relative spacing of the raceways and the dimensions between each raceway and the reference surface, and the detection deviation is required to not exceed 0.0015mm.
[0006] In the batch grinding production process, the guide rail is processed in a physical state of 4m long and nearly 10kg in weight. After the raceway grinding is completed, the raceway surface needs to be measured without damaging the product. However, the measurement of the guide rail raceway surface is limited by the product length, weight and accuracy requirements, so the guide rail needs to be moved to a specific environmental measurement room for testing.
[0007] The guide rail has four raceway surfaces, and the cross-section of each raceway surface extends to form a circle. The relative spacing and accuracy between the four circle centers are the most important characteristic requirements for the guide rail product quality. The method and detection device for measuring the relative spacing play a key role in controlling the quality stability of batch grinding production of guide rails, evaluating the parameter adjustment of related equipment, and determining the replacement of easily worn and consumable materials.
[0008] The current detection method relies on a universal three-coordinate measuring instrument. The probe on the head of the measuring instrument takes points at different positions on the arc surface of the raceway, and then draws the arc curve by curve fitting. Then the arc curve is fitted to form a circle and the center of the circle is obtained. In this process, because the guide rail itself is 4m long and weighs nearly 10kg, it is difficult to place the guide rail exactly at the accurate vertical position of the three-coordinate. The three-coordinate itself has a relatively large weight, and based on stability requirements, the three-coordinate instrument cannot be moved. It is difficult for the probe to take points on the same cross section. Inaccurate point taking will lead to deviations between the fitted arc curve and the center of the circle.
[0009] When the probe of the coordinate measuring machine takes a point on the arc, because the raceway surface is a small arc in cross section, this arc is less than a quarter of the full circle, and the arc curve and circle deviation generated by the general-purpose three-dimensional coordinate measuring machine are large, and the precision and accuracy of the measurement by the general-purpose three-dimensional coordinate measuring machine are difficult to meet the requirements.
[0010] The three-coordinate measuring machine has environmental temperature requirements and usually requires a special measuring room. If there is a measurement demand during production, the guide rail needs to be moved to the measuring room, which will incur many risks and costs in terms of personnel, logistics, work-in-process quantity control, safety, etc. Utility Model Content
[0011] In order to overcome the above-mentioned defects, the utility model provides a linear guide micro-arc high-precision measuring device, which can perform efficient and high-precision detection of linear guide micro-arcs, effectively reducing the cost of high-precision measurement of linear guide micro-arcs.
[0012] The utility model adopts a technical solution to solve the technical problem: a linear guide micro-arc high-precision measuring device, comprising a gantry support frame, a micrometer fixed block, a left profiling block, a right profiling block, a horizontal thrust elastic member and a micrometer, assuming that the width direction of the linear guide to be measured is the X direction, the height direction of the linear guide to be measured is the Z direction, and the length direction of the linear guide to be measured is the Y direction. The gantry support frame can be installed on the micrometer fixed block in a linear sliding manner in the X direction, and the left profiling block can be installed on the micrometer fixed block in a linear sliding manner in the X direction. The left profiling block is movably installed on the gantry support frame, the right profiling block is fixedly connected to the gantry support, the horizontal thrust elastic member provides the left profiling block with elastic force to move toward the right profiling block, the right side surface of the left profiling block is provided with a profiling convex arc surface matching the left raceway of the linear guide sample, the left side surface of the right profiling block is provided with a profiling convex arc surface matching the right raceway of the linear guide sample, the fixed end of the micrometer is fixedly installed on the micrometer fixed block, the measuring end of the micrometer is fixedly positioned with the left profiling block to measure the displacement change of the left profiling block along the X direction.
[0013] As a further improvement of the utility model, a left slide seat, a right slide seat, a left supporting elastic member and a right supporting elastic member are further provided. The micrometer fixed block can be installed on the left slide seat for a set distance in a straight line in the Z direction, and the right profiling block can be installed on the right slide seat for a set distance in a straight line in the Z direction. The left supporting elastic member and the right supporting elastic member respectively provide elastic floating retaining force along the Z direction to the micrometer fixed block and the right profiling block.
[0014] As a further improvement of the utility model, a left plate extending along the Z direction is fixedly installed on the left slide seat, and a right plate extending along the Z direction is fixedly installed on the right slide seat. The left and right plates are both provided with long holes extending along the Z direction. The micrometer fixed block and the right contour block are respectively fixed with connecting pieces, and the connecting pieces are respectively inserted into the long holes of the left and right plates to stop along the X direction and slide along the Z direction.
[0015] As a further improvement of the utility model, a left ball plate and a right ball plate are fixedly mounted on the lower ends of the left slide and the right slide, respectively. The left ball plate and the right ball plate are in rolling contact with the measuring platform through a plurality of rolling balls.
[0016] As a further improvement of the utility model, a micrometer push plate is also provided, which can be installed on the gantry support frame in a linear sliding manner along the X direction. The micrometer push plate is fixedly connected to the left profiling block, and the measuring end of the micrometer is stopped and positioned with the micrometer push plate.
[0017] As a further improvement of the utility model, a micrometer fixed rod mounting hole is provided on the micrometer fixed block, and a micrometer telescopic rod mounting hole is provided on the micrometer push plate. The fixed rod and telescopic rod of the micrometer are respectively detachably fixedly inserted in the micrometer fixed rod mounting hole and the micrometer telescopic rod mounting hole.
[0018] As a further improvement of the utility model, a spring push block is fixedly installed on the left profiling block, a left spring slot extending horizontally along the X direction is provided on the side wall of the micrometer fixed block, a right spring slot extending horizontally along the X direction is provided on the side wall of the spring push block, the horizontal thrust elastic member is a spring, and the two ends of the horizontal thrust elastic member in the telescopic direction are respectively fixedly inserted in the left spring slot and the right spring slot.
[0019] As a further improvement of the utility model, a precision linear guide rail extending linearly along the X direction is fixedly mounted on the gantry support frame, and the left profiling block is fixedly connected to a slider of the precision linear guide rail.
[0020] A linear guide rail micro-arc high-precision measurement method comprises the following steps:
[0021] Step 1: Place the selected standard linear guide rail horizontally on the measuring platform, place the gantry support frame of the linear guide rail micro-arc high-precision measuring device across both sides of the width direction of the standard linear guide rail, and place the left profiling block and the right profiling block on both sides of the width direction of the standard linear guide rail respectively;
[0022] Step 2: Loosen the horizontal thrust elastic member, and under the action of the elastic force of the horizontal thrust elastic member, push the left profiling block to slide elastically to the right, so that the profiling convex arc surface on the left direction block fits the upper and lower raceway arc surfaces on the left side of the standard linear guide, and at the same time pull the gantry support frame and the right profiling block thereon to slide to the left, so that the profiling convex arc surface on the right profiling block fits the upper and lower raceway arc surfaces on the right side of the standard linear guide;
[0023] Step 3: Return the micrometer on the linear guide micro-arc high-precision measuring device to zero;
[0024] Step 4: Place the linear guide sample horizontally on the measuring platform, remove the linear guide micro-arc high-precision measuring device from the standard linear guide, and place the gantry support frame of the linear guide micro-arc high-precision measuring device across both sides of the linear guide sample in the width direction, with the left profiling block and the right profiling block located on both sides of the linear guide sample in the width direction respectively;
[0025] Step 5: Loosen the horizontal thrust elastic member, and under the action of the elastic force of the horizontal thrust elastic member, push the left profiling block to slide elastically to the right, so that the profiling convex arc surface on the left direction block fits the upper and lower raceway arc surfaces on the left side of the linear guide rail sample, and at the same time pull the gantry support frame and the right profiling block thereon to slide to the left, so that the profiling convex arc surface on the right profiling block fits the upper and lower raceway arc surfaces on the right side of the linear guide rail sample;
[0026] Step 6: Record the micrometer reading on the linear guide micro-arc high-precision measuring device;
[0027] Step 7: Superimpose the standard raceway spacing values on the left and right sides of the standard linear guide and the values read in the micrometer to obtain a comprehensive value, which is the actual value of the raceway spacing on the left and right sides of the linear guide sample.
[0028] As a further improvement of the utility model, in step two and step five, the gantry support frame is pressed downward slightly multiple times so that the left support elastic member and the right support elastic member can overcome the deadweight of the upper half of the linear guide micro-arc high-precision measuring device, so that the left profiling block and the right close profiling block can be adaptively adjusted to fit closely with the four raceway arc surfaces on the standard linear guide or the linear guide sample.
[0029] The beneficial effect of the utility model is as follows: the utility model utilizes the segmentation principle in the TRIZ innovation theory to segment the two functions of the three-dimensional coordinate measuring machine, namely, point picking and data fitting, and splits the measurement process into two separate steps. First, the linear guide micro-arc high-precision measuring device is used to measure the raceway spacing on the left and right sides of the precision-machined standard linear guide, and the micrometer is zeroed, replacing the electronic program of the three-dimensional coordinate measuring machine to calculate the zeroing reference after point picking, and then the linear guide micro-arc high-precision measuring device is used to detect the linear guide sample, and the standard arcs precisely machined on the left and right profiling blocks on the linear guide micro-arc high-precision measuring device are used to simulate the arc of the raceway surface of the linear guide sample, replacing the three-dimensional coordinate measuring machine probe to pick points and fit the curve. At the same time, the disassembly principle is used to avoid the weight restrictions of the base of the three-dimensional coordinate measuring machine, and effectively solve the transportation contradiction caused by weight. This application effectively solves the fundamental problem that the linear guide rail samples are not placed in place and the measuring surface is less than one-quarter of the arc, which makes it impossible to effectively pick points and accurately measure. It can provide long-term and stable dimensional monitoring for production. After using this application to measure the linear guide rail samples, the measurement time for each measurement, adjustment of points and fitting curves is reduced from 30 minutes to 5 minutes. Under the premise of the same measurement accuracy, the measurement cost of this application is much lower than that of a three-coordinate measuring instrument. When using this application to test the linear guide rail samples, only one person is needed to complete it, and there are no high requirements for the skills of the measurement personnel, which reduces the measurement labor cost. This application realizes efficient, high-precision, and low-cost measurement of linear guides, and has no requirements for the measurement environment. It can be measured online in the workshop, which improves the convenience of linear guide rail detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 This is a stereoscopic diagram of the linear guide micro-arc high-precision measuring device of the utility model;
[0031] Figure 2 This is a front view of the linear guide micro-arc high-precision measuring device of the utility model;
[0032] Figure 3 for Figure 2 Enlarged view of part A in the middle;
[0033] Figure 4 It is a top view of the linear guide micro-arc high-precision measuring device of the utility model;
[0034] Figure 5 It is a left view of the linear guide micro-arc high-precision measuring device of the utility model. DETAILED DESCRIPTION
[0035] Embodiment: A linear guide micro-arc high-precision measuring device comprises a gantry support frame 1, a micrometer fixed block 2, a left profiling block 3, a right profiling block 4, a horizontal thrust elastic member 5 and a micrometer 23. The width direction of the linear guide to be measured is the X direction, the height direction of the linear guide to be measured is the Z direction, and the length direction of the linear guide to be measured is the Y direction. The gantry support frame 1 can be installed on the micrometer fixed block 2 in a linear sliding manner in the X direction, and the left profiling block 3 can be installed on the gantry support frame 1 in a linear sliding manner in the X direction. The right profiling block 4 is fixedly connected to the gantry bracket, and the horizontal thrust elastic member 5 provides the left profiling block 3 with an elastic force to move toward the right profiling block 4. The right side surface of the left profiling block 3 is provided with a profiling convex arc surface 7 that matches the left raceway of the linear guide sample 6, and the left side surface of the right profiling block 4 is provided with a profiling convex arc surface 7 that matches the right raceway of the linear guide sample 6. The fixed end of the micrometer 23 is fixedly mounted on the micrometer fixed block 2, and the measuring end of the micrometer 23 is fixedly positioned with the left profiling block 3 to measure the displacement change of the left profiling block 3 along the X direction.
[0036] When measuring the raceway spacing on the left and right sides of the linear guide sample 6, the gantry support frame 1 is straddled on the linear guide sample 6, so that the left profiling block 3 and the right profiling block 4 are respectively located on both sides of the width direction of the linear guide sample 6, and the elastic force of the horizontal thrust elastic member 5 along the X direction is used to push the left profiling block 3 to move to the right, while the right profiling block 4 moves to the left, and finally the profiling convex arc surface 7 on the left profiling block 3 and the right profiling block 4 is fitted on the upper and lower raceway arc surfaces on the left and right sides of the linear guide sample 6. The profiling convex arc surface 7 on the left profiling block 3 and the right profiling block 4 is a standard arc that is precisely machined, and is used to simulate and fit the linear guide. The arc of the raceway surface of the sample 6 can accurately obtain the raceway center position of the linear guide sample 6. The micrometer 23 is used to measure the distance between the left profiling block 3 and the micrometer fixed block 2. After the standard linear guide sample 6 and the linear guide sample 6 to be measured are measured respectively by using the measuring device, the raceway spacing value on the left and right sides of the linear guide sample 6 to be measured is obtained by superposition calculation. The linear guide micro-arc high-precision measuring device can quickly measure the raceway spacing value on the left and right sides of the linear guide sample 6. It has high measurement accuracy and is convenient to measure. It is not affected by the measurement environment and can be measured in real time in the workshop with low measurement cost.
[0037] A left slide 8, a right slide 9, a left supporting elastic member 10 and a right supporting elastic member 11 are also provided. The micrometer fixed block 2 can be installed on the left slide 8 for a set distance in a straight line in the Z direction, and the right profiling block 4 can be installed on the right slide 9 for a set distance in a straight line in the Z direction. The left supporting elastic member 10 and the right supporting elastic member 11 provide elastic floating retaining force along the Z direction to the micrometer fixed block 2 and the right profiling block 4 respectively.
[0038] The left supporting elastic member 10 and the right supporting elastic member 11 overcome the deadweight of the upper half of the linear guide micro-arc high-precision measuring device, so that the left profiling block 3 and the right profiling block 4 are balanced in force in the Z direction, and can adaptively adjust the height to fit closely with the four raceway arc surfaces of the linear guide sample 6. The left supporting elastic member 10 and the right supporting elastic member 11 are springs that elastically extend and retract along the Z direction. A spring slot extending along the Z direction is provided on the upper side of the left slide 8 and the right slide 9, and a spring slot extending along the Z direction is provided on the lower side of the micrometer fixed block 2 and the profiling block. The two ends of the left supporting elastic member 10 and the right supporting elastic member 11 are respectively inserted into the spring slots to achieve fixed positioning. The left supporting elastic member 10 and the right supporting elastic member 11 can be one spring, or multiple springs. This is an equivalent replacement structure that can be easily thought of by technical personnel in this field based on the present application and belongs to the protection scope of the present application.
[0039] A left plate 12 extending in the Z direction is fixedly mounted on the left slide 8, and a right plate 13 extending in the Z direction is fixedly mounted on the right slide 9. Both the left plate 12 and the right plate 13 are provided with long holes 14 extending in the Z direction. The micrometer fixed block 2 and the right profiling block 4 are respectively fixed with connecting pieces, and the connecting pieces are respectively inserted into the long holes 14 of the left plate 12 and the right plate 13 to stop sliding in the Z direction in the X direction. The left plate 12 and the right plate 13 are distributed on the left and right sides of the entire device, forming lateral support and restriction for the micrometer fixed block 2 and the right profiling block 4, ensuring that the micrometer fixed block 2 and the right profiling block 4 only slide back and forth in the Z direction, and limiting the distance of elastic movement of the micrometer fixed block 2 and the right profiling block 4 in the Z direction through the long holes 14.
[0040] The left and right sliding seats 8 and 9 are also fixedly mounted with a left ball plate 17 and a right ball plate 17 and 16 at their lower ends. The left and right ball plates 17 and 16 are in rolling contact with the measuring platform through a plurality of rolling balls 17 .
[0041] During measurement, because the weight of the track to be measured is relatively large and not easy to move, the measuring device needs to be moved. Human hands can only move in a large direction. After the track is installed, the measuring device needs to rely on the power of the horizontal thrust elastic member 5 to contract and clamp the linear track sample within a small range. The left ball 17 plate 15 and the right ball 17 plate 16 can overcome the friction between the work table and the measuring device, making it easier for the measuring device to move and clamp the linear track sample by itself. During this process, the left ball 17 plate 15 and the right ball 17 plate 16 are in rolling contact with the measuring platform, which greatly reduces the dynamic friction of the device that moves freely left and right, and can also avoid measurement errors caused by friction, where the left profiling block 3 and the right profiling block 4 do not fit tightly against the left and right raceways of the linear guide sample 6.
[0042] A micrometer push plate 18 is also provided, and the micrometer push plate 18 can be installed on the gantry support frame 1 so as to slide linearly along the X direction. The micrometer push plate 18 is fixedly connected to the left profiling block 3, and the measuring end of the micrometer 23 is positioned and stopped with the micrometer push plate 18. The micrometer push plate 18 moves left and right synchronously with the left profiling block 3 sliding left and right. The difference in moving distance of the micrometer push plate 18 when measuring the standard linear guide sample 6 and the linear guide sample 6 to be measured is the difference in the left and right raceway distance between the standard linear guide sample 6 and the linear guide sample 6 to be measured. The micrometer push plate 18 is preferably fixed at its lower end on the left profiling block 3, and a slideway extending along the X direction is preferably formed on the gantry support frame 1. The micrometer push plate 18 can be inserted into the slideway on the gantry support frame 1 so as to slide relatively along the X direction, so as to ensure that the micrometer push plate 18 only moves along the X direction.
[0043] The micrometer fixing block 2 is provided with a micrometer fixing rod mounting hole 19, and the micrometer push plate 18 is provided with a micrometer telescopic rod mounting hole 20. The fixing rod and telescopic rod of the micrometer 23 are respectively detachably fixedly inserted in the micrometer fixing rod mounting hole 19 and the micrometer telescopic rod mounting hole 20.
[0044] The fixed rod and telescopic rod of the micrometer 23 are respectively inserted into the micrometer fixed rod mounting hole 19 and the micrometer telescopic rod mounting hole 20, and then the micrometer 23 fixed rod and the micrometer 23 telescopic rod are locked and fixed with the micrometer fixed block 2 and the micrometer push plate 18 by screws. The micrometer 23 is easy to install and disassemble, and it is ensured that the reading of the micrometer 23 is consistent with the moving distance of the micrometer push plate 18.
[0045] A spring push block 21 is fixedly mounted on the left profiling block 3, a left spring slot extending horizontally along the X direction is provided on the side wall of the micrometer fixed block 2, a right spring slot extending horizontally along the X direction is provided on the side wall of the spring push block 21, and the horizontal thrust elastic member 5 is a spring, and the two ends of the horizontal thrust elastic member 5 in the expansion and contraction direction are respectively fixedly inserted into the left spring slot and the right spring slot. The above structure can ensure that the spring only expands and contracts along the X direction.
[0046] The gantry support frame 1 is also fixedly mounted with a precision linear guide rail 22 extending linearly in the X direction, and the left profiling block 3 is fixedly connected to the slider of the precision linear guide rail 22. It is ensured that the left profiling block 3 only slides in the X direction, thereby ensuring the measurement accuracy.
[0047] A linear guide rail micro-arc high-precision measurement method comprises the following steps:
[0048] Step 1: Place the selected standard linear guide rail horizontally on the measuring platform, place the gantry support frame 1 of the linear guide rail micro-arc high-precision measuring device across both sides of the width direction of the standard linear guide rail, and the left profiling block 3 and the right profiling block 4 are respectively located on both sides of the width direction of the standard linear guide rail. At this time, the raceway surfaces on both sides of the standard linear guide rail are not in close contact with the left profiling block 3 and the right profiling block 4;
[0049] Step 2: Loosen the horizontal thrust elastic member 5, and under the elastic force of the horizontal thrust elastic member 5, push the left profiling block 3 to slide elastically to the right, so that the profiling convex arc surface 7 on the left direction block fits the upper and lower raceway arc surfaces on the left side of the standard linear guide, and press the gantry support frame 1 downward slightly for multiple times, so that the left support elastic member 10 and the right support elastic member 11 overcome the deadweight of the upper half of the linear guide micro-arc high-precision measuring device, so that the left profiling block 3 and the right close profiling block are adaptively adjusted to fit closely with the four raceway arc surfaces on the standard linear guide or the linear guide sample 6;
[0050] Because the standard linear guide is heavy (nearly 10kg) and inconvenient to move, the upper and lower raceway arc surfaces on the right side of the standard linear guide cannot fit together. Under the reaction force of the horizontal thrust elastic member 5, the mechanism on the left side of the device has a tendency to move to the left. Under this tendency, the gantry support frame 1 and the right profiling block 4 thereon are simultaneously pulled to slide to the left. The profiling convex arc surface 7 on the right profiling block 4 fits the upper and lower raceway arc surfaces on the right side of the standard linear guide. The left profiling block 3 and the right profiling block 4 are horizontally The thrust elastic member 5 can only push the raceway surface in the left and right directions, that is, in the horizontal direction. The arcs on the precisely machined left profiling block 3 and the right profiling block 4 cannot effectively fit the raceway arc surface of the linear rail sample in the vertical direction. At this time, it is necessary to press the gantry support frame 1 slightly and multiple times. The left support elastic member 10 and the right support elastic member 11 will overcome the deadweight of the upper half of the device, so that the left profiling block 3 and the right profiling block 4 can be adaptively adjusted to fit closely with the four raceway arc surfaces of the linear guide sample 6.
[0051] Step 3: Return the micrometer on the linear guide micro-arc high-precision measuring device to zero;
[0052] Step 4: Place the linear guide sample 6 horizontally on the measuring platform, remove the linear guide micro-arc high-precision measuring device from the standard linear guide, and place the gantry support frame 1 of the linear guide micro-arc high-precision measuring device across both sides of the linear guide sample 6 in the width direction, and the left profiling block 3 and the right profiling block 4 are respectively located on both sides of the linear guide sample 6 in the width direction. At this time, the raceway surfaces on both sides of the linear guide sample 6 are not in close contact with the left profiling block 3 and the right profiling block 4;
[0053] Step 5: Loosen the horizontal thrust elastic member 5, and under the elastic force of the horizontal thrust elastic member 5, push the left profiling block 3 to slide elastically to the right, so that the profiling convex arc surface 7 on the left direction block fits the upper and lower raceway arc surfaces on the left side of the linear guide sample 6, and press the gantry support frame 1 downward slightly for multiple times, so that the left support elastic member 10 and the right support elastic member 11 overcome the deadweight of the upper half of the linear guide micro-arc high-precision measuring device, so that the left profiling block 3 and the right close profiling block are adaptively adjusted to fit closely with the four raceway arc surfaces on the standard linear guide or the linear guide sample 6;
[0054] Since the standard linear guide sample 6 is heavy (nearly 10kg) and inconvenient to move, the upper and lower raceway arc surfaces on the right side of the linear guide sample 6 cannot fit together. Under the reaction force of the horizontal thrust elastic member 5, the mechanism on the left side of the device has a tendency to move to the left. Under this tendency, the gantry support frame 1 and the right profiling block 4 thereon are simultaneously pulled to slide to the left, and the profiling convex arc surface 7 on the right profiling block 4 fits the upper and lower raceway arc surfaces on the right side of the linear guide sample 6.
[0055] The left profiling block 3 and the right profiling block 4 can only be pushed to fit the raceway surface in the left and right directions, that is, in the horizontal direction, under the action of the horizontal thrust elastic member 5. The arcs on the precisely machined left profiling block 3 and the right profiling block 4 still cannot effectively fit the raceway arc surface of the linear rail sample in the vertical direction. At this time, it is necessary to press the gantry support frame 1 slightly and multiple times, and the left supporting elastic member 10 and the right supporting elastic member 11 will overcome the deadweight of the upper half of the device, so that the left profiling block 3 and the right profiling block 4 can be adaptively adjusted to fit closely with the four raceway arc surfaces of the linear guide sample 6.
[0056] Step 6: Record the micrometer reading on the linear guide micro-arc high-precision measuring device;
[0057] Step 7: Superimpose the standard raceway spacing values on the left and right sides of the standard linear guide and the values read in the micrometer to obtain a comprehensive value, which is the actual value of the raceway spacing on the left and right sides of the linear guide sample 6.
[0058] The above-mentioned measurement method adopts a linear guide micro-arc high-precision measuring device. Since the linear guide micro-arc high-precision measuring device has a simple structure and light weight, it can slide left and right to adapt to the raceway position of the linear guide, without moving the linear track sample, and the placement of the linear track sample to be measured will not affect the measurement. The high-precision processed profiling convex arc surface 7 fits the raceway arc surface of the linear guide sample 6, avoiding point fitting errors and ensuring measurement accuracy. It can provide long-term and stable dimensional monitoring for production. The measurement time for each measurement of the three-coordinate measuring instrument to adjust the point taking and fitting curve is 30 minutes, while it only takes 5 minutes to measure with the utility model, and a general-purpose three-coordinate measuring instrument is used for measurement. If the accuracy of 0.0015mm is required, the purchase cost of the general-purpose three-coordinate measuring instrument is about 1.15 million, while the purchase cost of this device is about 6,000, which greatly reduces the cost of the measuring equipment. When measuring with a general-purpose three-coordinate measuring instrument, one person is required to measure and another person is required to cooperate in carrying. The utility model only requires one person to operate and there is no need to carry the sample to be measured.
Claims
1. A linear guide micro-arc high-precision measurement device, characterized in that: The invention comprises a gantry support frame (1), a micrometer fixed block (2), a left profiling block (3), a right profiling block (4), a horizontal thrust elastic member (5) and a micrometer (23), wherein the width direction of the linear guide rail to be measured is the X direction, the height direction of the linear guide rail to be measured is the Z direction, and the length direction of the linear guide rail to be measured is the Y direction; the gantry support frame can be installed on the micrometer fixed block so as to slide linearly in the X direction; the left profiling block can be installed on the gantry support frame so as to slide linearly in the X direction; and the right profiling block can be installed on the gantry support frame so as to slide linearly in the X direction. The profiling block is fixedly connected to the gantry bracket, the horizontal thrust elastic member provides the left profiling block with an elastic force to move toward the right profiling block, the right side surface of the left profiling block is provided with a profiling convex arc surface (7) matching the left side raceway of the linear guide rail sample (6), the left side surface of the right profiling block is provided with a profiling convex arc surface matching the right side raceway of the linear guide rail sample, the fixed end of the micrometer is fixedly installed on the micrometer fixed block, and the measuring end of the micrometer is fixedly positioned with the left profiling block to measure the displacement change of the left profiling block along the X direction.
2. The linear guide micro-arc high-precision measuring device according to claim 1, characterized in that: A left slide seat (8), a right slide seat (9), a left supporting elastic member (10) and a right supporting elastic member (11) are also provided. The micrometer fixed block can be installed on the left slide seat for linear sliding in the Z direction for a set distance. The right profiling block can be installed on the right slide seat for linear sliding in the Z direction for a set distance. The left supporting elastic member and the right supporting elastic member respectively provide elastic floating retaining force along the Z direction to the micrometer fixed block and the right profiling block.
3. The linear guide micro-arc high-precision measuring device according to claim 2, characterized in that: A left side plate (12) extending in the Z direction is fixedly mounted on the left slide seat, and a right side plate (13) extending in the Z direction is fixedly mounted on the right slide seat. Long strip holes (14) extending in the Z direction are provided on the left side plate and the right side plate. Connecting pieces are fixedly mounted on the micrometer fixed block and the right profiling block respectively. The connecting pieces are inserted into the long strip holes of the left side plate and the right side plate respectively for stopping in the X direction and sliding in the Z direction.
4. The linear guide micro-arc high-precision measuring device according to claim 2, characterized in that: A left ball plate (15) and a right ball plate (16) are fixedly mounted on the lower ends of the left slide seat and the right slide seat, respectively. The left ball plate and the right ball plate are in rolling contact with the measuring platform through a plurality of rolling balls (17).
5. The linear guide micro-arc high-precision measuring device according to claim 1, characterized in that: A micrometer push plate (18) is also provided. The micrometer push plate is installed on the gantry support frame so as to be able to slide linearly along the X direction. The micrometer push plate is fixedly connected to the left profiling block. The measuring end of the micrometer is fixedly positioned with the micrometer push plate.
6. The linear guide micro-arc high-precision measuring device according to claim 5, characterized in that: The micrometer fixing block is provided with a micrometer fixing rod mounting hole (19), and the micrometer push plate is provided with a micrometer telescopic rod mounting hole (20), and the fixing rod and telescopic rod of the micrometer are respectively detachably fixedly inserted in the micrometer fixing rod mounting hole and the micrometer telescopic rod mounting hole.
7. The linear guide micro-arc high-precision measuring device according to claim 1, characterized in that: A spring push block (21) is fixedly mounted on the left profiling block, a left spring slot extending horizontally along the X direction is provided on the side wall of the micrometer fixed block, a right spring slot extending horizontally along the X direction is provided on the side wall of the spring push block, the horizontal thrust elastic member is a spring, and two ends of the horizontal thrust elastic member in the extension direction are respectively fixedly inserted into the left spring slot and the right spring slot.
8. The linear guide micro-arc high-precision measuring device according to claim 1, characterized in that: A precision linear guide rail (22) extending linearly along the X direction is also fixedly mounted on the gantry support frame, and the left profiling block is fixedly connected to a slide block of the precision linear guide rail.