Precise lead screw grinding and inspecting device

Abstract

The utility model discloses a precise lead screw grinding and checking device, which relates to the technical field of analytical instrument manufacturing and comprises a grinding mechanism, a checking mechanism and a controller. The grinding mechanism comprises a bottom plate, a sliding rail, and a driver, a first base, a grinding nut and a second base which are sequentially arranged on the bottom plate; the sliding rail is fixedly arranged on a bottom plate on one side, far away from the driver, of the first base; the grinding nut is slidably arranged on the sliding rail in the first direction and used for being in threaded connection with a lead screw to be ground. The first base and the second base are rotationally connected with the end of a lead screw to be ground through bearings correspondingly. The driver is used for driving the to-be-ground screw to rotate around the axis of the to-be-ground screw, and the first direction is parallel to the axis of the to-be-ground screw; the inspection mechanism comprises a torque sensor, and the torque sensor is arranged between an output shaft of the driver and the corresponding end of the lead screw to be ground. The controller is in communication connection with the driver and the torque sensor. Synchronous grinding and inspection are achieved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to analytical instrument manufacturing technical field, in particular to a kind of precision lead screw grinding and testing device. BACKGROUND

[0002] The lead screw of spectrophotometer is the important component of optical system to carry out grating angle fine adjustment, and the last machining procedure of the piece is grinding. As the precision lead screw grinding device in the past: there is a fixing mechanism, and the clamped lead screw keeps the lead screw fixed; a yoke mechanism makes the grinding sliding block rotate with the lead screw axis as center; a driving mechanism makes the grinding sliding block continuously forward or reverse transmission; a control mechanism controls the motor rotation speed to adjust torque to adapt to the friction force difference of different lead screws. The grinding has the following disadvantages:

[0003] Grinding time is not fixed, and after grinding to specified time, the lead screw needs to be disassembled to manually rotate the lead screw for reinspection, and if reinspection is unqualified (stuck point), it needs to be re-grounded, causing time waste. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of precision lead screw grinding and testing device to solve the problems existing in the prior art, realize grinding and testing simultaneously, and improve work efficiency.

[0005] To achieve the above object, the utility model provides the following scheme:

[0006] The utility model provides a kind of precision lead screw grinding and testing device, including grinding mechanism, testing mechanism and controller;The grinding mechanism includes bottom plate, driver, first base, second base, slide rail and grinding nut;The driver, the first base, the grinding nut and the second base are sequentially arranged on the bottom plate;The slide rail is fixedly arranged on the bottom plate on the side of the first base away from the driver;The grinding nut is slidably arranged on the slide rail along the first direction, and the grinding nut is used to be connected with the lead screw to be ground;The first base and the second base are rotatably connected with the end of the lead screw to be ground respectively by bearing;The driver is used to drive the lead screw to be ground to rotate around its own axis, and the first direction is parallel to the axis of the lead screw to be ground;The testing mechanism includes torque sensor, and the torque sensor is arranged between the output shaft of the driver and the corresponding end of the lead screw to be ground;The controller is communicatively connected with the driver and the torque sensor.

[0007] Preferably, the grinding nut is fixedly provided with a light section, the bottom plate is fixedly provided with a photoelectric switch, and the photoelectric switch corresponds to the end of the grinding part of the lead screw to be ground;The photoelectric switch is communicatively connected with the controller.

[0008] Preferably, the first base is fixedly arranged on the bottom plate; the second base is slidably arranged on the bottom plate along the first direction; the bottom plate is provided with a quick clamping mechanism, the quick clamping mechanism is provided with a limiting part, and the limiting part is used for limiting and keeping the relative position of the second base on the bottom plate.

[0009] Preferably, a sliding block is slidably arranged on the sliding rail along the first direction, and the sliding block is located on the side of the grinding nut away from the first base; the second base is fixedly connected with the sliding block.

[0010] Preferably, the quick clamping mechanism is fixedly arranged on a quick clamping fixing plate; the bottom plate is provided with a plurality of internally threaded holes along the length direction thereof; the quick clamping fixing plate is provided with at least two mounting holes; and each mounting hole is screw-connected with a fastening bolt in a corresponding one of the internally threaded holes.

[0011] Preferably, the sliding rail is fixedly provided with a baffle at the end away from the first base.

[0012] Preferably, a shaft coupling is arranged between the drive and the torque sensor and / or between the torque sensor and the corresponding end of the wire rod to be ground.

[0013] Preferably, the grinding nut is detachably fixedly provided with a sliding seat, and the sliding seat is slidably arranged on the sliding rail along the first direction.

[0014] Preferably, a bearing limiting plate is fixedly arranged on the side of the first base close to the second base and on the side of the second base close to the first base.

[0015] Preferably, a load connecting bracket is fixedly arranged on the grinding nut, and a load applicator is arranged on the bottom plate; an output end of the load applicator is connected with the load connecting bracket, and the load applicator is used for providing a load force environment simulating the working state of the wire rod to be ground.

[0016] The utility model discloses the following technical effects are obtained relative to the prior art:

[0017] The precision screw grinding and inspection device provided by the utility model is connected to the screw by bearings at both ends through the first base and the second base, which provides stable support for the screw to be ground. This double-end support method can effectively reduce the shaking of the screw during the grinding process and ensure the coaxiality of the screw when rotating around its own axis, thereby improving the grinding accuracy; when the driver drives the screw to rotate, the grinding nut can move accurately along the axial direction of the screw to achieve uniform grinding of the screw thread; a torque sensor is arranged between the output shaft of the driver and the corresponding end of the screw to be ground, which can monitor the torque applied to the screw during the grinding process in real time. During the screw grinding process, the change in torque can reflect the resistance of grinding. This setting can realize real-time inspection of the smoothness of the screw while grinding. Any inconsistent inspection torque can be eliminated during the grinding process. There is no need to continue manual re-inspection after grinding, which improves work efficiency; the controller is communicated with the driver and the torque sensor to realize automatic control of the grinding process.

[0018] Furthermore, the cooperation between the photoelectric switch and the optical opening piece enables the controller to monitor the relative position of the grinding nut, so as to better control the forward and reverse rotation and grinding stroke of the driver.

[0019] Furthermore, the second base can be slidably set on the bottom plate along the first direction, while the first base is fixed; this structure makes it possible to easily adjust the distance between the first base and the second base when installing screw rods of different lengths to be ground. This design increases compatibility with screw rods of different specifications. In actual production scenarios, there is no need to equip screw rods of different lengths with a variety of grinding devices of different sizes, thereby reducing equipment costs; the setting of the quick-clamping mechanism can quickly fix the position of the second base; this process is easy to operate, can save installation and debugging time, and improve work efficiency; and the second base and the grinding nut both slide on the slide rail, and are fixed when grinding screw rods of different lengths, which can ensure the axial consistency of the entire mechanism when grinding the screw rods.

[0020] Furthermore, the arrangement of the slider sliding along the slide rail ensures that the second base and the grinding nut have a high degree of coordination in the movement in the first direction.

[0021] Furthermore, multiple internal threaded holes are provided on the side wall of the base plate along the length direction, and the L-shaped quick clamp fixing plate is fixed by using fastening bolts in conjunction with the mounting holes and the internal threaded holes. This design allows the quick clamp mechanism to have multiple installation position options in the length direction of the base plate, that is, to cooperate with the fixation of different positions of the second base.

[0022] Furthermore, the provision of the blocking piece can effectively prevent the slider from continuing to slide, thereby preventing the slider from falling off the slide rail.

[0023] Further, the shaft coupling is arranged between the driver and the torque sensor and / or between the torque sensor and the corresponding end of the grinding screw rod, which can effectively buffer the impact force that may occur during grinding, and ensure that the force transmission is more stable; when different models of drivers or screw rods need to be replaced, the shaft coupling can improve the compatibility of the device.

[0024] Further, the lower end of the grinding nut is fixed to the sliding seat in a detachable manner, and when the grinding nut is worn, damaged or needs to be replaced with a grinding nut of different specifications to adapt to the grinding requirements of different screw rods, the grinding nut can be conveniently detached from the sliding seat; the detachable sliding seat and grinding nut combination structure can adapt to different grinding needs by replacing different grinding nuts.

[0025] Further, the bearing limiting plate can effectively limit the axial position of the bearing installed on the base for supporting the end of the screw rod to be ground, so as to ensure that the axial position of the screw rod during rotation is more accurate, and indirectly improve the grinding accuracy of the screw rod.

[0026] Further, the load simulator is connected to the grinding nut to provide a load force environment simulating the working state of the screw rod to be ground, so that the stress state of the screw rod during grinding is closer to the actual working condition, and the grinding of the grinding nut on the screw rod during grinding is more in line with the actual demand, thereby optimizing the grinding accuracy of the screw rod, ensuring that the ground screw rod can better play its function after being installed in the actual equipment, and improving the overall operation accuracy of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 The overall structure schematic diagram of the precision screw rod grinding and testing device provided by the present application is shown in the figure.

[0029] Figure 2 The structure schematic diagram of the precision screw rod grinding and testing device provided by the present application is shown in the figure.

[0030] Figure 3 The overall structure schematic diagram of the precision screw rod grinding and testing device provided by the present application is shown in the figure.

[0031] In the figure:

[0032] 1-base plate; 2-driver; 3-motor bracket; 4-coupling; 5-torque sensor; 6-sensor bracket; 7-first base; 8-screw to be ground; 9-grinding nut; 10-photoelectric switch; 11-light opening piece; 12-slide; 13-second base; 14-slide rail; 15-slider; 16-quick clamp fixing plate; 17-quick clamp mechanism; 18-blocking piece; 19-bearing limit plate; 20-load connection bracket; 21-rolling ramp; 22-first rod body; 23-second rod body; 24-pull spring; 25-grating arm; 26-rotating wheel; 27-controller. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The purpose of the utility model is to provide a precision screw grinding and testing device to solve the problems existing in the prior art, realize synchronous grinding and testing, and improve work efficiency.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] Example 1

[0037] This embodiment provides a precision screw grinding and testing device, such as Figures 1-3 As shown, it includes a grinding mechanism, an inspection mechanism and a controller 27; the grinding mechanism includes a base plate 1, a driver 2, a first base 7, a second base 13, a slide rail 14 and a grinding nut 9; the driver 2, the first base 7, the grinding nut 9 and the second base 13 are arranged on the base plate 1 in sequence; the slide rail 14 is fixedly arranged on the base plate 1 on the side of the first base 7 away from the driver 2; the grinding nut 9 is slidably arranged on the slide rail 14 along a first direction, and the grinding nut 9 is used to be threadedly connected to the screw rod 8 to be ground; the first base 7 and the second base 13 are respectively rotatably connected to the end of the screw rod 8 to be ground through bearings (the end of the screw rod 8 to be ground has a screw shaft, and each screw shaft is connected to the corresponding bearing); the driver 2 is used to drive the screw rod 8 to be ground to rotate around its own axis, and the first direction is parallel to the axis of the screw rod 8 to be ground; the inspection mechanism includes a torque sensor 5, which is arranged between the output shaft of the driver 2 and the corresponding end of the screw rod 8 to be ground; the controller 27 is communicatively connected to the driver 2 and the torque sensor 5.

[0038] The first base 7 and the second base 13 are respectively rotatably connected to the ends of the lead screw by bearings, thereby providing stable support for the lead screw to be ground. The double-end support mode can effectively reduce the shaking of the lead screw during the grinding process, ensure the coaxiality of the lead screw when rotating around its own axis, and thereby improve the grinding precision. When the driver 2 drives the lead screw to rotate, the grinding nut 9 can move axially along the lead screw accurately, thereby realizing uniform grinding of the lead screw thread. The torque sensor 5 is arranged between the output shaft of the driver 2 and the corresponding end of the lead screw to be ground, thereby being capable of monitoring the torque received by the lead screw in real time during the grinding process. During the grinding process of the lead screw, the change of the torque can reflect the resistance of the grinding. This arrangement can realize real-time inspection of the smoothness of the lead screw during the grinding process. If the inspection torque is inconsistent, the inconsistency can be eliminated during the grinding process, without the need for manual re-inspection after the grinding, thereby improving the work efficiency. The controller 27 is in communication connection with the driver 2 and the torque sensor 5, thereby realizing automatic control of the grinding process.

[0039] Among them, about the driver 2:

[0040] Specifically, the driver 2 adopts a stepping motor.

[0041] Specifically, the driver 2 is fixed on the bottom plate 1 through the motor support 3 and corresponding bolts.

[0042] Among them, about the torque sensor 5:

[0043] Specifically, the torque sensor 5 is fixed on the bottom plate 1 through the sensor support 6 and corresponding bolts.

[0044] Specifically, the torque sensor 5 is an existing device, and its structure and connection mode are not described here.

[0045] Specifically, during the grinding, the torque sensor 5 transmits the torque signal to the controller 27, the controller 27 determines the grinding time according to the torque, and when the grinding is qualified, the torque sensor 5 transmits the qualified torque signal to the controller 27, and the controller 27 stops the grinding by controlling the driver 2.

[0046] Among them, about the related setting between the driver 2 and the torque sensor 5 and between the torque sensor 5 and the first base 7:

[0047] In the optional scheme of the embodiment, it is more preferred that Figure 1 and Figure 2As shown, a coupling 4 is provided between the driver 2 and the torque sensor 5 and / or between the torque sensor 5 and the corresponding end of the lead screw 8 to be ground. The provision of the coupling 4 between the driver 2 and the torque sensor 5 and / or between the torque sensor 5 and the corresponding end of the lead screw 8 to be ground effectively cushions impact forces that may occur during the grinding process, ensuring smoother force transmission. The coupling 4 also improves the compatibility of the device when replacing a different model of driver 2 or lead screw.

[0048] Specifically, the coupling 4 between the torque sensor 5 and the screw rod 8 to be ground is connected to the end of the screw rod 8 to be ground through an adjustable bolt.

[0049] Among them, regarding the first base 7 and the second base 13:

[0050] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the first base 7 is fixedly mounted on the base plate 1; the second base 13 is slidably mounted on the base plate 1 along a first direction; a quick-clamping mechanism 17 is provided on the base plate 1, and the quick-clamping mechanism 17 has a limit portion for limiting and maintaining the relative position of the second base 13 on the base plate 1. The second base 13 can be slidably mounted on the base plate 1 along the first direction, while the first base 7 is fixed. This structure allows for convenient adjustment of the distance between the first base 7 and the second base 13 when installing screw rods 8 of different lengths to be ground. This design increases compatibility with screw rods of different specifications. In actual production scenarios, there is no need to equip screw rods of different lengths with multiple grinding devices of different sizes, reducing equipment costs. The provision of the quick-clamping mechanism 17 can quickly secure the position of the second base 13. This process is simple to operate, can save installation and debugging time, and improve work efficiency. In addition, the second base 13 and the grinding nut 9 both slide on the slide rail 14. The fixation when grinding screw rods of different lengths can ensure the axial consistency of the entire mechanism when grinding the screw rods.

[0051] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the quick-clamp mechanism 17 is fixed to the quick-clamp fixing plate 16. Multiple internally threaded holes are provided along the length of the base plate 1. The quick-clamp fixing plate 16 has at least two mounting holes, each of which is internally threadedly connected to a corresponding internally threaded hole and secured with a fastening bolt. Multiple internally threaded holes are provided along the length of the sidewall of the base plate 1. The L-shaped quick-clamp fixing plate 16 is secured using fastening bolts through the mounting holes and internally threaded holes. This design allows the quick-clamp mechanism 17 to be installed in a variety of positions along the length of the base plate 1, allowing it to be secured to different locations of the second base 13.

[0052] Specifically, the quick clamping mechanism 17 adopts a quick clamp clamping device commonly used on existing tooling fixtures, which will not be described here.

[0053] In an optional solution of the embodiment, preferably, as shown in Figure 1 and Figure 2 , the slide rail 14 is provided with a sliding block 15 on the side away from the first base 7 in the first direction, and the second base 13 is fixedly connected with the sliding block 15. The arrangement of the sliding block 15 sliding along the slide rail 14 ensures that the movement of the second base 13 and the grinding nut 9 in the first direction is highly coordinated.

[0054] In an optional solution of the embodiment, preferably, as shown in Figure 1 and Figure 2 , the slide rail 14 is provided with a sliding block 15 on the side away from the first base 7 in the first direction, and the second base 13 is fixedly connected with the sliding block 15. The arrangement of the sliding block 15 sliding along the slide rail 14 ensures that the movement of the second base 13 and the grinding nut 9 in the first direction is highly coordinated.

[0055] In an optional solution of the embodiment, preferably, as shown in Figure 1 and Figure 2 , the slide rail 14 is provided with a sliding block 15 on the side away from the first base 7 in the first direction, and the second base 13 is fixedly connected with the sliding block 15. The arrangement of the sliding block 15 sliding along the slide rail 14 ensures that the movement of the second base 13 and the grinding nut 9 in the first direction is highly coordinated.

[0056] In an optional solution of the embodiment, preferably, as shown in and

[0057] , the slide rail 14 is provided with a sliding block 15 on the side away from the first base 7 in the first direction, and the second base 13 is fixedly connected with the sliding block 15. The arrangement of the sliding block 15 sliding along the slide rail 14 ensures that the movement of the second base 13 and the grinding nut 9 in the first direction is highly coordinated. Figure 1 Figure 2 In an optional solution of the embodiment, preferably, as shown in and

[0058] , the slide rail 14 is provided with a sliding block 15 on the side away from the first base 7 in the first direction, and the second base 13 is fixedly connected with the sliding block 15. The arrangement of the sliding block 15 sliding along the slide rail 14 ensures that the movement of the second base 13 and the grinding nut 9 in the first direction is highly coordinated. Figure 1 Figure 2As shown, the grinding nut 9 is fixedly provided with a light sheet 11, and the bottom plate 1 is fixedly provided with a photoelectric switch 10 corresponding to the end of the grinding part of the to-be-ground screw rod 8; the photoelectric switch 10 is in communication connection with the controller 27. The cooperation of the photoelectric switch 10 and the light sheet 11 can realize the monitoring of the relative position of the grinding nut 9 by the controller 27, so as to better control the forward and reverse rotation of the driver 2 and the grinding stroke.

[0059] Specifically, the photoelectric switch 10 is arranged at a position corresponding to the end of the to-be-ground screw rod 8 close to the first base 7, and can be used for detecting the initial position of the grinding nut 9.

[0060] Specifically, the driver 2 drives the to-be-ground screw rod 8 to rotate, thereby driving the grinding nut 9 to move linearly on the slide rail 14, and the light sheet 11 is fixed on the slide seat 12 of the grinding nut 9 by bolts. When the light sheet 11 moves to the photoelectric switch 10, an induction signal is generated, and the induction signal is transmitted to the controller 27.

[0061] In the optional scheme of the embodiment, more preferably, as shown in Figure 1 and Figure 3 As shown, the grinding nut 9 is fixedly provided with a load connection bracket 20, and the bottom plate 1 is provided with a load device; the output end of the load device is connected with the load connection bracket 20, and the load device is used for driving the grinding nut 9 to provide a simulated load force environment under the working state of the to-be-ground screw rod 8. By driving the grinding nut 9 to provide a simulated load force environment under the working state of the to-be-ground screw rod 8 through the load device, the stress state of the screw rod during the grinding process is closer to the actual working condition, and the grinding of the grinding nut 9 on the screw rod is more in line with the actual demand during the simulation of the load force environment during the grinding process, thereby optimizing the grinding precision of the screw rod, ensuring that the ground screw rod can better play its function after being installed into the actual equipment, and improving the overall operation precision of the equipment.

[0062] Specifically, the load device includes a first rod body 22, a second rod body 23, a pulling spring 24, a grating arm 25, and a rotating wheel 26; the lower end of the first rod body 22 is rotationally arranged on the bottom plate 1 through a rotating bearing, and the rotating axis thereof is parallel to the vertical axis; one end of the grating arm 25 is fixedly connected with the upper end of the first rod body 22, and the other end of the grating arm 25 is rotationally provided with the rotating wheel 26, and the rotating axis of the rotating wheel 26 is parallel to the rotating axis of the first rod body 22; the lower end of the second rod body 23 is fixedly connected with the bottom plate 1, the upper end of the second rod body 23 is fixedly connected with one end of the pulling spring 24, and the other end of the pulling spring 24 is fixedly connected with the grating arm 25; the load connection bracket 20 is a straight plate structure, and the load connection bracket 20 is provided with a rolling inclined surface 21, and the rotating wheel 26 is rolling arranged on the rolling inclined surface 21.

[0063] Among them, the other setting is explained as follows:

[0064] Specifically, the controller 27 is provided with a display.

[0065] The principle and implementation mode of the specific examples applied in the utility model are described, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A precision screw grinding and inspection device, characterized by: Including grinding mechanism, inspection mechanism and controller; The grinding mechanism includes a base plate, a driver, a first base, a second base, a slide rail and a grinding nut; the driver, the first base, the grinding nut and the second base are sequentially arranged on the base plate; the slide rail is fixedly arranged on the base plate on the side of the first base away from the driver; the grinding nut is slidably arranged on the slide rail along a first direction, and the grinding nut is used to be threadedly connected to the screw rod to be ground; the first base and the second base are respectively rotatably connected to the end of the screw rod to be ground through bearings; the driver is used to drive the screw rod to be ground to rotate around its own axis, and the first direction is parallel to the axis of the screw rod to be ground; The inspection mechanism includes a torque sensor, which is arranged between the output shaft of the driver and the corresponding end of the screw to be ground; The controller is in communication with the driver and the torque sensor.

2. The precision screw grinding and inspection device according to claim 1, characterized in that: The grinding nut is fixedly provided with a light opening piece, and the bottom plate is fixedly provided with a photoelectric switch, which corresponds to the end of the grinding part of the screw rod to be ground; the photoelectric switch is communicatively connected with the controller.

3. The precision screw grinding and inspection device according to claim 1, characterized in that: The first base is fixedly arranged on the bottom plate; The second base is slidably arranged on the bottom plate along the first direction; The bottom plate is provided with a quick clamping mechanism, and the quick clamping mechanism has a limiting portion, and the limiting portion is used to limit and maintain the relative position of the second base on the bottom plate.

4. The precision screw grinding and inspection device according to claim 3, characterized in that: A slider is provided on the slide rail for sliding along the first direction, and the slider is located on a side of the grinding nut away from the first base; The second base is fixedly connected to the slider.

5. The precision screw grinding and inspection device according to claim 3, characterized in that: The quick clamp mechanism is fixedly arranged on the quick clamp fixing plate; The bottom plate is provided with a plurality of internal threaded holes along its length direction; the quick clamp fixing plate is provided with at least two mounting holes; each mounting hole is connected to a corresponding internal threaded hole with a fastening bolt through an internal thread.

6. The precision screw grinding and inspection device according to claim 4, characterized in that: A blocking piece is fixedly provided on one end of the slide rail away from the first base.

7. The precision screw grinding and inspection device according to claim 1, characterized in that: A coupling is provided between the driver and the torque sensor and / or between the torque sensor and the corresponding end of the screw to be ground.

8. The precision screw grinding and inspection device according to claim 1, characterized in that: A slide is detachably fixed to the lower end of the grinding nut, and the slide is slidably arranged on the slide rail along the first direction.

9. The precision screw grinding and inspection device according to claim 1, characterized in that: A bearing limiting plate is fixedly provided on one side of the first base close to the second base and on one side of the second base close to the first base.

10. The precision screw grinding and testing device according to claim 1, characterized in that: A load connection bracket is fixedly provided on the grinding nut, and a load device is provided on the bottom plate; The output end of the load device is connected to the load connection bracket, and the load device is used to link the grinding nut to provide a load force environment that simulates the working state of the screw rod to be ground.

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