Linear guide rail pair precision detection device

Abstract

The invention relates to the field of guide rail detection, and discloses a linear guide rail pair precision detection device which comprises a precision detection frame. A guide rail testboard; the guide rail test bench is fixedly connected to the upper surface of the precision detection frame; a precision detection mechanism; the slide block pneumatic clamp is arranged on the slide block of the guide rail, the precision detection mechanism is arranged on the upper surface of the guide rail test bench, and the precision detection mechanism is used for marking lines and marking fluctuating positions in the process of testing the precision of the linear guide rail. An operator pushes the sliding block to slowly move on the guide rail by pushing the testing mechanism, if the guide rail has straightness errors in the horizontal direction, the sliding block can generate tiny deflection, the deflection can be transmitted to the linkage arm through the sliding block pneumatic clamp, and then the overturning arm is driven to slightly rotate around the rotating shaft; the tiny rotation enables the water-based marking pen to draw a curve on a drawing, so that the straightness deviation of the guide rail in the horizontal direction is visually reflected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of guide rail detection, especially to a linear guide rail pair precision detection device. BACKGROUND

[0002] The linear guide rail pair, as a kind of high-precision rolling transmission element, is composed of a guide rail and a slider, and is widely used in numerical control machine tools, industrial robots, semiconductor manufacturing equipment, precision measuring instruments and other high-end equipment fields due to its high precision, high rigidity, low friction and stable motion performance. In these applications, the motion precision of the linear guide rail pair, such as walking parallelism and straightness, is a key factor to determine the machining precision, positioning precision and running stability of the whole machine equipment. Therefore, efficient and accurate detection of the precision of the linear guide rail pair is an indispensable quality control link in the production process.

[0003] According to Chinese patent publication No. CN120426911B, a linear guide rail pair precision detection device is disclosed, which comprises a detection platform, a moving module, a second clamping module, a driving guide rail module and a laser interferometer. The moving module comprises a longitudinal telescopic cylinder, a shell, a gas guide groove, a rubber nozzle, a pressure sensor, a first air hole and a reflector. The movable end of the longitudinal telescopic cylinder is provided with a shell, the reflector is fixedly arranged on one side of the shell, the rubber nozzle and the pressure sensor are fixedly arranged on the other side of the shell, the inner side of the shell is provided with a gas guide groove, and the first air hole is arranged between the inner side of the rubber nozzle and the gas guide groove. The second clamping module comprises a clamping piece, a telescopic rod and a second air hole. The clamping piece is fixedly connected with the telescopic rod, the telescopic rod is slidingly connected in the gas guide groove, and the surface of the telescopic rod is provided with the second air hole. The device has the characteristics of multi-directional limiting and accurate detection data, but the device still has deficiencies. The precision detection devices of the device and the prior art mostly use micrometers, dial gauges or laser interferometers to detect the precision of the guide rail. The output results are often a series of complex numbers or waveform graphs. The operator needs to have professional knowledge and experience to interpret these data and judge whether they are within the tolerance range. This way not only takes time, but also is prone to misjudgment due to human factors such as reading errors and insufficient experience, which cannot allow frontline quality inspectors to quickly and intuitively draw conclusions about whether the product is qualified or not. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a linear guide rail pair precision detection device to solve the above problems.

[0005] To achieve the above purpose, the present application is implemented by the following technical scheme: a linear guide rail pair precision detection device, comprising: a precision detection frame; a guide rail test table, which is fixedly connected to the upper surface of the precision detection frame; A precision testing mechanism is installed on the upper surface of a guide rail testing platform. This mechanism is used to scribing lines and marking undulations during the testing of the linear guide rail's precision. The precision testing mechanism includes a pneumatic slider clamp, a linkage arm, a rotating shaft, a flipping arm, a magnetic plate, a scribing cylinder, a water-based marker pen, an undulation pressing cylinder, a pressing head, a discharge nozzle, a scribing plate, an iron sheet layer, a flipping stop, and auxiliary indicator lines. The pneumatic slider clamp is installed on the upper surface of the slider of the guide rail to be tested. Linkage arms are fixedly connected to both the inner and outer sides of the pneumatic slider clamp. A rotating shaft is rotatably connected to the lower surface of the linkage arm at the end furthest from the pneumatic slider clamp. A flipping arm is fixedly connected to the outer side of the rotating shaft. Both ends of the arm are rotatably connected to magnetic plates. A marking tube is fixedly connected inside the front end of the flip arm. A water-based marker pen is connected to one end of the marking tube. A water-based pen erasing cloth is provided on the outer surface of the magnetic plate at the rear. When the slider moves to the end of the guide rail, the front end of the flip arm will encounter a flipping block fixed on the marking plate. The flipping block will block and apply a torque, forcing the flip arm to flip around the axis of rotation. As the flip arm flips, the magnetic plate with the water-based pen erasing cloth at its rear end will be attracted to the surface of the marking plate. When the operator moves the slider in the opposite direction to the starting position, the water-based pen erasing cloth will continuously wipe the tip of the water-based marker pen to completely remove the residual ink and prepare for the next test. Specifically, the linear guide pair to be tested is placed and fixed on the guide test bench. Then, the pneumatic clamp is used to clamp the slider on the guide. The operator pushes the testing mechanism to slowly move the slider on the guide. If there is a straightness error in the horizontal direction of the guide, the slider will produce a slight wobble. This wobble will be transmitted to the linkage arm through the pneumatic clamp, which will then drive the flip arm to rotate slightly around the rotation axis. This slight rotation will cause the water-based marker to draw a curve on the drawing, thus visually reflecting the straightness deviation of the guide in the horizontal direction. When the slider moves to a position on the guide surface with a depression or convexity, the slider will... The vertical movement generates a bounce that causes the entire tilting arm to move up and down. When the slider passes a concave point, the pressing head presses down, squeezing the marking liquid (which can be different colored ink) inside the undulating pressing cylinder, causing it to drip from the discharge nozzle onto the drawing, forming a mark. When the slider passes a convex point, the pressing head instantly disengages, triggering another mark. In this way, all vertical defects on the guide rail are accurately marked. This method does not require complex readings and data analysis; the curvature of a line and the position of a few points are enough to clearly judge the quality of the guide rail, improving quality inspection efficiency.

[0006] A push testing mechanism is provided; the push testing mechanism is located on one side of the precision detection mechanism.

[0007] Specifically, after clamping, the motor is started and begins to rotate. The motor transmits power to the transmission wheel on the right side through the transmission belt. The transmission wheel synchronously drives the drive belt to move, thereby causing the connecting arm and the slider push plate at the end to move linearly along the length of the guide rail. When the test begins, the slider push plate will press against the front end of the slider on the guide rail to be tested, pushing the entire slider forward at a constant speed along the guide rail, thereby triggering the precision detection mechanism to detect the precision of the guide rail to be tested.

[0008] Preferably, the lower end of the rotating shaft is rotatably connected to the upper surface of a fixing pad, the lower surface of the fixing pad is fixedly connected to an undulating pressing cylinder, the lower surface of the undulating pressing cylinder is provided with a pressing head, the upper surface of the pressing head and the undulating pressing cylinder are provided with a spring, and a discharge nozzle is provided on one side of the undulating pressing cylinder.

[0009] Preferably, the pushing test mechanism includes a connecting bracket, a connecting piece, a connecting shaft, a motor, a transmission belt, a transmission wheel, a drive belt, a connecting arm, and a slider push plate, with the lower end of the connecting bracket fixedly connected to the upper surface of the precision testing frame.

[0010] Preferably, a drive belt is provided on the inner side of the connecting bracket, and connecting shafts are provided on both the left and right sides of the drive belt. A connecting arm is fixedly connected to the inner side of the drive belt, and a slider push plate is fixedly connected to the end of the connecting arm away from the drive belt.

[0011] Preferably, a transmission wheel is fixedly connected to the upper end of the connecting shaft on the right side. The transmission wheel is sleeved inside the transmission belt. A motor is provided on the lower side of the other side of the transmission belt, and the output end of the motor is located inside the transmission belt. The motor is fixedly connected to the side of the connecting bracket.

[0012] Preferably, the slider pusher is disposed in front of the slider of the guide rail to be tested, and the guide rail to be tested is disposed on the upper surface of the guide rail test table.

[0013] Preferably, two elastic buckles are symmetrically arranged on both the left and right sides of the upper surface of the guide rail test platform, and the four elastic buckles are located at the edges of both sides of the guide rail to be tested.

[0014] Specifically, the operator only needs to place the guide rail to be tested into the four elastic clips on the guide rail test table. The operator only needs to press the guide rail down gently, and the elastic clips will deform elastically to allow the guide rail to pass through. Then, they will quickly spring back and lock the edges of the guide rail from both sides, firmly fixing it to the guide rail test table.

[0015] Preferably, the number of scribing plates is set to two, and the two scribing plates are respectively fixedly connected to both sides of the guide rail test platform.

[0016] Preferably, both the inner front and rear ends of the two marking plates are fixedly connected with flipping blocks.

[0017] Preferably, an iron sheet layer is fixedly connected to the outer side of both scribing plates, and an auxiliary indicator line is provided on the upper inner side of both scribing plates. Beneficial effects

[0018] This invention provides a linear guide pair accuracy testing device. Compared with the prior art, it has the following advantages: 1. In this invention, through a precision detection mechanism, firstly, the linear guide rail pair to be tested is placed and fixed on the guide rail test table. Then, the pneumatic clamp is used to clamp the slider on the guide rail. The operator pushes the testing mechanism to slowly move the slider on the guide rail. If there is a straightness error in the horizontal direction of the guide rail, the slider will produce a slight sway. This sway will be transmitted to the linkage arm through the pneumatic clamp, which will then drive the flip arm to rotate slightly around the rotation axis. This slight rotation will cause the water-based marker to draw a curve on the drawing, thus intuitively reflecting the straightness deviation of the guide rail in the horizontal direction. When the slider moves to a position where there is a depression or convexity on the guide rail surface, the slider will produce a vertical jump. This jump will drive the entire flip arm to move up and down. When the slider passes a depression, the pressing head will press down, squeezing the marking liquid (which can be ink of different colors) in the undulating pressing cylinder, making... The ink drips from the discharge nozzle onto the drawing, forming a mark. When the slider passes a raised point, the pressing head instantly disengages, triggering another mark. In this way, all vertical defects on the guide rail are accurately marked. This method does not require complex readings and data analysis; the curvature of a line and the position of a few points are enough to clearly judge the quality of the guide rail, improving quality inspection efficiency. In addition, when the slider moves to the end of the guide rail, the front end of the flip arm encounters a flip stop fixed to the scribing plate. The flip stop blocks and applies a torque, forcing the flip arm to rotate around the axis of rotation. As the flip arm rotates, the magnetic plate with a water-based pen eraser at its rear end adheres to the surface of the scribing plate. When the operator moves the slider in the opposite direction from the starting position, the water-based pen eraser continuously wipes the tip of the water-based marker pen, completely removing any residual ink and preparing for the next inspection. 2. In this invention, through the set push testing mechanism, before the test begins, the operator only needs to place the guide rail to be tested into the four elastic buckles of the guide rail test table. The operator only needs to press the guide rail down gently, and the elastic buckles will undergo elastic deformation to allow the guide rail to pass through. Then, they will quickly rebound and lock the edges of the guide rail from both sides, firmly fixing it to the guide rail test table. After clamping, the motor is started, and the motor begins to rotate. The power is transmitted to the transmission wheel on the right side through the transmission belt. The transmission wheel synchronously drives the drive belt to move, thereby driving the connecting arm and the slider push plate at the end to move linearly in the length direction of the guide rail. When the test begins, the slider push plate will abut against the front end of the slider on the guide rail to be tested, pushing the entire slider forward at a constant speed along the guide rail, thereby triggering the accuracy detection mechanism to detect the accuracy of the guide rail to be tested. Attached Figure Description

[0019] Figure 1 This is a top-view three-dimensional structural diagram of a linear guide pair precision detection device proposed in this invention; Figure 2 This is a schematic diagram of the upper part of a linear guide pair precision detection device proposed in this invention; Figure 3 This is a schematic diagram of the guide rail test bench in a linear guide rail pair precision testing device proposed in this invention; Figure 4 This is a top view of the guide rail test bench in a linear guide rail pair precision testing device proposed in this invention. Figure 5 This is a schematic diagram of the precision detection mechanism in a linear guide pair precision detection device proposed in this invention; Figure 6 This is a bottom view of the precision detection mechanism in a linear guide pair precision detection device proposed in this invention. Figure 7 This is a schematic diagram of the pushing test mechanism in a linear guide pair precision testing device proposed in this invention; Figure 8 This is a schematic diagram of the scribing plate in a linear guide pair precision testing device proposed in this invention.

[0020] Legend: 1. Precision testing frame; 2. Guide rail testing platform; 3. Precision testing mechanism; 301. Slider pneumatic clamp; 302. Linkage arm; 303. Rotating shaft; 304. Tilting arm; 305. Magnetic suction plate; 306. Marking cylinder; 307. Water-based marker pen; 308. Irregular pressing cylinder; 309. Pressing head; 310. Discharge nozzle; 311. Marking plate; 312. Iron sheet layer; 313. Tilting stop; 314. Auxiliary indicator line; 315. Fixing shim; 4. Push testing mechanism; 401. Connecting bracket; 402. Connecting piece; 403. Connecting shaft; 404. Motor; 405. Transmission belt; 406. Transmission wheel; 407. Drive belt; 408. Connecting arm; 409. Slider push plate; 5. Guide rail to be tested; 6. Elastic buckle. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments: Example 1:

[0023] A linear guide pair precision testing device includes: a precision testing frame 1; a guide rail testing table 2; the guide rail testing table 2 is fixedly connected to the upper surface of the precision testing frame 1; a precision testing mechanism 3; the precision testing mechanism 3 is disposed on the upper surface of the guide rail testing table 2, and is used to scribing lines and marking undulation positions during the process of testing the precision of the linear guide. The precision testing mechanism 3 includes a slider pneumatic clamp 301, a linkage arm 302, a rotating shaft 303, a flipping arm 304, a magnetic suction plate 305, a scribing cylinder 306, a water-based marker pen 307, an undulation pressing cylinder 308, a pressing head 309, a discharge nozzle 310, a scribing plate 311, an iron sheet layer 312, a flipping stop 313, an auxiliary indicator line 314, and a slider pneumatic clamp 301. 1. A sliding block is set on the upper surface of the slider of the guide rail 5 to be tested. Both the inner and outer sides of the slider pneumatic clamp 301 are fixedly connected to a linkage arm 302. A rotating shaft 303 is rotatably connected to the lower surface of the end of the linkage arm 302 away from the slider pneumatic clamp 301. A flipping arm 304 is fixedly connected to the outer side of the rotating shaft 303. Magnetic suction plates 305 are rotatably connected to both the front and rear ends of the flipping arm 304. A scribing tube 306 is fixedly connected inside the front end of the flipping arm 304. A water-based marker pen 307 is connected to one end of the scribing tube 306. A water-based pen erasing cloth is provided on the outer surface of the rear magnetic suction plate 305. Two scribing plates 311 are set, and the two scribing plates 311 are fixedly connected to both sides of the guide rail test platform 2. The inner surfaces of the two scribing plates 311... A flip-stop block 313 is fixedly connected to both the front and rear ends of the guide rail. An iron sheet layer 312 is fixedly connected to the outer side of each of the two scribing plates 311. An auxiliary indicator line 314 is provided above the inner side of each of the two scribing plates 311. Ideally, a high-precision guide rail should not have any horizontal sway when its slider moves. In this case, the water-based marker pen 307 should draw a straight line on the drawing that is completely parallel to the auxiliary indicator line 314. When the curve drawn by the marker pen bends or deviates from the auxiliary indicator line 314, this auxiliary indicator line becomes the standard line for judging the deviation. Inspectors can visually see where the curve deviates to the left or right from the baseline, thus quickly locating the straightness error of the guide rail. In the area, inspectors can use a simple ruler or calipers to measure the vertical distance from any point on the scribing curve to the auxiliary indicator line 314. When the slider moves to the end of the guide rail, the front end of the flip arm 304 will encounter the flip stop 313 fixed on the scribing plate 311. The flip stop 313 will block and apply a torque, forcing the flip arm 304 to flip around the rotation axis 303. As the flip arm 304 flips, the magnetic plate 305 with a water-based pen eraser at its rear end will be attracted to the surface of the scribing plate 311. When the operator moves the slider in the opposite direction to the starting position, the water-based pen eraser will continuously wipe the tip of the water-based marker pen 307 to completely remove the residual ink and prepare for the next inspection.

[0024] During operation, the linear guide pair to be tested is placed and fixed on the guide test bench 2. Then, the pneumatic slider clamp 301 is clamped onto the slider of the guide rail. The operator pushes the test mechanism 4 to slowly move the slider on the guide rail. If there is a straightness error in the horizontal direction of the guide rail, the slider will produce a slight wobble. This wobble will be transmitted to the linkage arm 302 through the pneumatic slider clamp 301, which in turn drives the flip arm 304 to rotate slightly around the rotation axis 303. This slight rotation will cause the water-based marker pen 307 to draw a curve on the drawing, thus intuitively reflecting the straightness deviation of the guide rail in the horizontal direction. When the slider moves to a position where there is a depression or bulge on the surface of the guide rail, the slider... The block will produce vertical jumping, which will drive the entire flip arm 304 to move up and down. When the slider passes a concave point, the pressing head 309 will press down, squeezing the marking liquid in the undulating pressing cylinder 308. This liquid can be different colored ink, causing it to drip from the discharge nozzle 310 onto the drawing, forming a marking point. When the slider passes a convex point, the pressing head 309 will instantly disengage, triggering another marking. In this way, all vertical defects on the guide rail are accurately marked. This method does not require complex readings and data analysis. The curvature of a line and the position of a few points can be used to clearly judge the quality of the guide rail, greatly improving the efficiency of quality inspection.

[0025] Example 2:

[0026] Based on Embodiment 1, a pushing test mechanism 4 is provided. The pushing test mechanism 4 is located on one side of the precision detection mechanism 3. The pushing test mechanism 4 includes a connecting bracket 401, a connecting piece 402, a connecting shaft 403, a motor 404, a transmission belt 405, a transmission wheel 406, a drive belt 407, a connecting arm 408, and a slider push plate 409. The lower end of the connecting bracket 401 is fixedly connected to the upper surface of the precision detection frame 1. A drive belt 407 is provided on the inner side of the connecting bracket 401, and connecting arms 408 are provided on both the left and right sides of the drive belt 407. A connecting shaft 403 is connected to the inner side of the drive belt 407, and a connecting arm 408 is fixedly connected to the end of the connecting arm 408 away from the drive belt 407. A slider push plate 409 is fixedly connected to the upper end of the connecting shaft 403 on the right side. The transmission wheel 406 is sleeved inside the transmission belt 405. A motor 404 is arranged below the other side of the transmission belt 405, and the output end of the motor 404 is located inside the transmission belt 405. The motor 404 is fixedly connected to the side of the connecting bracket 401. The slider push plate 409 is fixedly connected to the inner side of the drive belt 407, and the upper end of the connecting shaft 403 is fixedly connected to the inner side of the drive belt 407, and the upper end of the drive belt 407 ... Plate 409 is positioned in front of the slider of the guide rail 5 to be tested. The guide rail 5 is positioned on the upper surface of the guide rail testing platform 2. Two elastic clips 6 are symmetrically arranged on both the left and right sides of the upper surface of the guide rail testing platform 2. The four elastic clips 6 are located at the edges of both sides of the guide rail 5 to be tested. Before testing begins, the operator simply places the guide rail 5 to be tested into the four elastic clips 6 of the guide rail testing platform 2. The operator then gently presses down on the guide rail, causing the elastic clips 6 to deform elastically, allowing the guide rail to pass through. They then quickly spring back, locking the edges of the guide rail from both sides. Securely fix it on the guide rail test bench 2. After clamping, start the motor 404. The motor 404 starts to rotate and transmits power to the transmission wheel 406 on the right side through the transmission belt 405. The transmission wheel 406 synchronously drives the drive belt 407 to move, thereby driving the connecting arm 408 and the slider push plate 409 at the end to move linearly in the length direction of the guide rail. When the test starts, the slider push plate 409 will abut against the front end of the slider on the guide rail to be tested, pushing the entire slider to move forward at a constant speed along the guide rail, thereby triggering the accuracy detection mechanism 3 to detect the accuracy of the guide rail 5 to be tested.

[0027] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A linear guide pair accuracy testing device, characterized in that: include: Precision testing frame (1); Guide rail test bench (2); the guide rail test bench (2) is fixedly connected to the upper surface of the precision testing frame (1); Precision testing mechanism (3); The precision testing mechanism (3) is set on the upper surface of the guide rail test bench (2). The precision testing mechanism (3) is used to scribing and marking the undulation position during the process of testing the precision of the linear guide rail. The precision testing mechanism (3) includes a slider pneumatic clamp (301), a linkage arm (302), a rotating shaft (303), a flipping arm (304), a magnetic suction plate (305), a scribing cylinder (306), a water-based marker pen (307), an undulation pressing cylinder (308), a pressing head (309), a discharge nozzle (310), a scribing plate (311), an iron sheet layer (312), a flipping stop (313), and an auxiliary indicator line (314). The slider pneumatic clamp (301) The upper surface of the slider of the guide rail (5) to be tested is provided. The inner and outer sides of the slider pneumatic clamp (301) are fixedly connected with linkage arms (302). The lower surface of the linkage arm (302) away from the slider pneumatic clamp (301) is rotatably connected with a rotating shaft (303). The outer side of the rotating shaft (303) is fixedly connected with a flipping arm (304). The front and rear ends of the flipping arm (304) are rotatably connected with magnetic suction plates (305). The front end of the flipping arm (304) is fixedly connected with a marking tube (306). One end of the marking tube (306) is connected with a water-based marker pen (307). The outer surface of the magnetic suction plate (305) on the rear side is provided with a water-based pen erasing cloth. Push test mechanism (4); the push test mechanism (4) is set on one side of the precision detection mechanism (3).

2. The linear guide pair accuracy testing device according to claim 1, characterized in that: The lower end of the rotating shaft (303) is rotatably connected to the upper surface of the fixing pad (315). The lower surface of the fixing pad (315) is fixedly connected to the undulating pressing cylinder (308). The lower surface of the undulating pressing cylinder (308) is provided with a pressing head (309). A spring is provided between the upper surface of the pressing head (309) and the undulating pressing cylinder (308). A discharge nozzle (310) is provided on one side of the undulating pressing cylinder (308).

3. The linear guide pair accuracy testing device according to claim 1, characterized in that: The pushing test mechanism (4) includes a connecting bracket (401), a connecting piece (402), a connecting shaft (403), a motor (404), a transmission belt (405), a transmission wheel (406), a drive belt (407), a connecting arm (408), and a slider push plate (409). The lower end of the connecting bracket (401) is fixedly connected to the upper surface of the precision testing frame (1).

4. The linear guide pair accuracy testing device according to claim 3, characterized in that: The inner side of the connecting bracket (401) is provided with a driving belt (407), and the left and right sides of the driving belt (407) are provided with connecting shafts (403). The inner side of the driving belt (407) is fixedly connected with a connecting arm (408), and the end of the connecting arm (408) away from the driving belt (407) is fixedly connected with a slider push plate (409).

5. The linear guide pair accuracy testing device according to claim 4, characterized in that: A transmission wheel (406) is fixedly connected to the upper end of the connecting shaft (403) on the right side. The transmission wheel (406) is sleeved inside the transmission belt (405). A motor (404) is provided on the lower side of the other side of the transmission belt (405). The output end of the motor (404) is located inside the transmission belt (405). The motor (404) is fixedly connected to the side of the connecting bracket (401).

6. The linear guide pair accuracy testing device according to claim 4, characterized in that: The slider push plate (409) is set on the front side of the slider of the guide rail (5) to be tested, and the guide rail (5) to be tested is set on the upper surface of the guide rail test table (2).

7. The linear guide pair accuracy testing device according to claim 1, characterized in that: The guide rail test platform (2) has two elastic buckles (6) symmetrically arranged on both the left and right sides of its upper surface, and the four elastic buckles (6) are located at the edges of both sides of the guide rail (5) to be tested.

8. The linear guide pair accuracy testing device according to claim 1, characterized in that: The number of scribing plates (311) is set to two, and the two scribing plates (311) are respectively fixedly connected to both sides of the guide rail test bench (2).

9. The linear guide pair accuracy testing device according to claim 8, characterized in that: Both of the inner front and rear ends of the two marking plates (311) are fixedly connected with flipping blocks (313).

10. A linear guide pair accuracy testing device according to claim 8, characterized in that: Both of the two marking plates (311) have iron sheet layers (312) fixedly connected to their outer sides, and auxiliary indicator lines (314) are provided on the upper inner sides of both of the two marking plates (311).

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