Device and method for detecting the parallelism of the spindle box

Abstract

This application discloses a device and method for detecting the parallelism of a spindle box. The device for detecting the parallelism of the spindle box includes a base, a first guide rail, a second guide rail, a platform adjustment mechanism, a straightness detection mechanism, a normal simulation mechanism, and an axis simulation mechanism. The first and second guide rails are mounted on the base; the platform adjustment mechanism includes a platform adjustment component, a support plate, and a limiting component. The support plate is located on the side of the platform adjustment component away from the base, and the limiting component is located on the surface of the support plate away from the platform adjustment component; the straightness detection mechanism is mounted on either the first or second guide rail; the normal simulation mechanism is used to simulate the normal of the first end face; and the axis simulation mechanism is used to simulate the axis of the lead screw. This application can solve the problem in the prior art where the detection reference of the normal of the spindle box mounting end face and the axis of the lead screw is different from that of the spindle box guide rail, resulting in the normal and axis not being parallel to the guide rail, thus reducing the spindle accuracy.

Description

Technical Field

[0001] This application relates to the field of machine tool testing technology, and more specifically, to a device and method for testing the parallelism of a spindle box. Background Technology

[0002] The spindle box is a crucial component of a machine tool, used to mount the machine tool's work spindle. It is mounted on the machine tool frame via sliders and guideways, and driven by components such as lead screws, enabling the spindle to move along its axial direction. The guideways are vital motion control components within the spindle, providing high-precision and stable linear motion. However, in practical applications, the linearity of the linear guideways, the parallelism between the guideways, and the perpendicularity between the guideways and the spindle box end faces significantly impact motion accuracy. Therefore, it is necessary to evaluate the influence of guideway linearity, parallelism, and perpendicularity on motion accuracy.

[0003] The linearity, parallelism, and perpendicularity of guideways are generally tested using measuring equipment, comparing the actual motion trajectory with the ideal trajectory. If the linearity, parallelism, and perpendicularity of the guideways exceed the allowable range, it will lead to a decrease in motion accuracy. This is especially true for high-precision spindles, where even minor errors will result in reduced accuracy. However, existing linearity testing methods use a level or collimator to check the straightness of the guideways, then use a dial indicator mounted on the checked guideway to determine the parallelism of other guideways to the checked guideway. The perpendicularity of the spindle box mounting face is measured using a right-angle ruler. All linearity, parallelism, and perpendicularity checks are based on a horizontal surface placed on the spindle box as the testing reference. Therefore, it is necessary to ensure that the mounting plane of the spindle box guideways is parallel to one side (non-assembly surface) of the spindle box. However, apart from the guide rail mounting surface and the spindle mounting surface, other surfaces of the spindle box are generally not precision-machined, which can easily lead to measurement errors, causing a qualified guide rail to be judged as unqualified. To improve accuracy, the contact surface between the spindle box and the placement platform needs to be precision-machined, which increases the number of machining steps and the difficulty. In addition, the inspection datum of the spindle box mounting end face is different from that of the guide rail, which can easily lead to errors and thus reduce the accuracy of the spindle. Summary of the Invention

[0004] The main objective of this application is to provide a device and method for detecting the parallelism of a spindle box, in order to solve the problem in the prior art where the normal of the spindle box mounting end face, the axis of the lead screw, and the detection reference of the spindle box guide rail are different, resulting in the normal and axis being non-parallel to the guide rail and reducing the spindle accuracy.

[0005] According to one aspect of this application, a device for detecting the parallelism of a spindle box is provided, comprising:

[0006] A base, on which a first guide rail and a second guide rail are provided, the first guide rail and the second guide rail being spaced apart on the base and extending along a second direction;

[0007] A platform adjustment mechanism, comprising at least two platforms, wherein the at least two platforms are spaced apart along the second direction on the base and located between the first guide rail and the second guide rail, the platform adjustment mechanism comprising a platform adjustment component, a support plate and a limiting component, the support plate being disposed on the side of the platform adjustment component away from the base, the platform adjustment component being used to adjust the height of the support plate and the distance between the support plate and the first guide rail and the second guide rail, and the limiting component being disposed on the surface of the support plate away from the platform adjustment component;

[0008] A straightness detection mechanism is provided on the first guide rail or the second guide rail to detect the parallelism between the third guide rail and the first guide rail of the spindle box, and between the fourth guide rail and the second guide rail of the spindle box.

[0009] A normal simulation mechanism is used to be installed on the end face flange of the spindle box to simulate the normal of the first end face;

[0010] An axis simulation mechanism is provided, which is mounted on the lead screw flange of the spindle box to simulate the axis of the lead screw.

[0011] Furthermore, the platform adjustment component includes:

[0012] Mounting plate;

[0013] A movable block is movably disposed on the side of the mounting plate opposite to the base, and a support plate is disposed on the movable block;

[0014] The adjustment bracket includes two brackets, which are spaced apart on both sides of the mounting plate along the first direction;

[0015] A first adjusting component is disposed on the two adjusting brackets and connected to the movable block. The first adjusting component adjusts the position of the movable block to adjust the distance between the support plate and the first guide rail and the second guide rail.

[0016] The second adjustment component includes at least one, and the at least one second adjustment component is disposed on the side of the movable block opposite to the mounting plate. The second adjustment component is used to adjust the height of the support plate.

[0017] Furthermore, the first adjusting component includes a first bolt, which is rotatably mounted on the adjusting bracket and extends through the adjusting bracket to abut against the moving block, thereby driving the moving block to reciprocate along the first direction;

[0018] The second adjusting component includes a second bolt and a nut. The nut is disposed on the movable block, and the movable block is provided with a threaded hole adapted to the second bolt. The second bolt is connected to the nut and is rotatably disposed in the threaded hole. The support plate is provided with a limiting groove adapted to the second bolt.

[0019] Furthermore, a linear guide is provided on one of the mounting plate and the base, and a sliding groove adapted to the linear guide is provided on the other, and both the linear guide and the sliding groove extend along the second direction.

[0020] Furthermore, the limiting component is a limiting block, and the limiting block includes at least two. The at least two limiting blocks are spaced apart on the support plate along the first direction or along the second direction, and the at least two limiting blocks surround to form an installation space, in which the spindle box is installed.

[0021] Furthermore, the straightness detection mechanism includes:

[0022] A slider, which is movably disposed on the first guide rail or the second guide rail;

[0023] The mounting bracket is rotatably mounted on the slider and slides along the first guide rail or the second guide rail under the action of the slider;

[0024] A measuring instrument, rotatably mounted on the mounting bracket, is used to detect the parallelism between the third guide rail and the first guide rail of the spindle box, and between the fourth guide rail and the second guide rail of the spindle box, driven by the slider.

[0025] Furthermore, the mounting bracket includes:

[0026] A first support rod is rotatably mounted on the slider;

[0027] A second support rod, one end of which is rotatably disposed at the end of the first support rod away from the slider, and the measuring gauge is rotatably disposed at the end of the second support rod away from the first support rod.

[0028] Furthermore, the normal simulation mechanism includes a first flange and a normal rod, the first flange being detachably mounted on the end face flange, and the normal rod being vertically disposed on the first flange.

[0029] Furthermore, the axis simulation mechanism includes a second flange and an axis rod, the second flange being detachably mounted on the lead screw flange, and the axis rod being vertically disposed on the second flange.

[0030] On the other hand, this application also provides a method for detecting the parallelism of a spindle box, wherein the method for detecting the parallelism of a spindle box is performed using the aforementioned spindle box parallelism detection device, and the method for detecting the parallelism of a spindle box includes:

[0031] Step S1: Install the spindle box on the support plate and within the installation space; install the normal simulation mechanism on the end face flange of the spindle box; and install the axis simulation mechanism on the lead screw flange of the spindle box.

[0032] Step S2: Install the slider on the first or second guide rail and slide it along the first or second guide rail to use a measuring instrument to check the parallelism between the third guide rail and the first guide rail and the fourth guide rail and the second guide rail on the spindle box. If the third guide rail and the first guide rail and the fourth guide rail and the second guide rail on the spindle box are not parallel, use the platform adjustment component to adjust the height of the spindle box and the distance between the spindle box and the first and second guide rails. Then use a measuring instrument to check the parallelism between the third guide rail and the first guide rail and the fourth guide rail and the second guide rail until the third guide rail and the first guide rail and the fourth guide rail and the second guide rail are parallel.

[0033] Step S3: Move the measuring instrument to the normal simulation mechanism or the axis simulation mechanism, push the slider to slide on the first guide rail, and use the measuring instrument to detect the parallelism between the normal rod and the first guide rail, as well as the parallelism between the axis rod and the first guide rail.

[0034] Furthermore, in step S3, if the parallelism between the normal rod and the first guide rail or the parallelism between the axis rod and the first guide rail does not meet the requirements, the spindle box is reworked and steps S1 to S3 are repeated until the parallelism between the normal rod and the first guide rail or the parallelism between the axis rod and the first guide rail meets the requirements.

[0035] In this application, when actually processing the testing device, the first guide rail and the second guide rail can be installed on the base at intervals along the first direction, and the platform adjustment component can be installed on the base and located between the first guide rail and the second guide rail. Then, the support plate with the limiting component is installed on the platform adjustment component. At this time, the spindle box can be installed on the support plate, and the platform adjustment component can adjust the height of the support plate and the distance between the support plate and the first guide rail and the second guide rail, thereby adjusting the height of the spindle box and the distance between the spindle box and the first guide rail and the second guide rail, so that the third guide rail and the fourth guide rail of the spindle box remain parallel to the first guide rail and the second guide rail.

[0036] After installing the first guide rail, the second guide rail, and the platform adjustment mechanism, a straightness detection mechanism can be installed on either the first or second guide rail. This mechanism is then used to check the parallelism between the third guide rail and the first guide rail of the spindle box, and between the fourth guide rail and the second guide rail, to determine the parallelism detection benchmark. Next, a flange simulation mechanism is installed on the end face flange of the spindle box to simulate the normal to the first end face, and an axis simulation mechanism is installed on the lead screw flange of the spindle box to simulate the axis of the lead screw. In this way, the straightness detection mechanism can be used to check the parallelism between the normal and the first guide rail, and between the axis and the first guide rail, to determine whether the normal and axis of the spindle box meet the required requirements. As can be seen, compared with the existing technology where the normal of the spindle box mounting end face, the axis of the lead screw, and the detection benchmark of the spindle box guide rail are different, this application uses the first guide rail as the detection benchmark to detect the parallelism of the normal of the first end face of the spindle box, the axis of the lead screw, the third guide rail, and the fourth guide rail. The benchmark is unified, thereby improving the detection accuracy of the spindle box, which in turn effectively improves the detection efficiency and thus improves the accuracy of the spindle. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of the spindle box parallelism detection device disclosed in the embodiments of this application;

[0039] Figure 2 This is a top view of the spindle box parallelism detection device disclosed in an embodiment of this application;

[0040] Figure 3 This is a side view of the spindle box parallelism detection device disclosed in an embodiment of this application;

[0041] Figure 4This is a schematic diagram of the spindle box, platform adjustment mechanism, normal simulation mechanism, and axis simulator disclosed in the embodiments of this application;

[0042] Figure 5 This is a side view of the spindle box, platform adjustment mechanism, normal simulation mechanism, and axis simulator disclosed in the embodiments of this application;

[0043] Figure 6 This is a schematic diagram of the structure of the platform adjustment component disclosed in the embodiments of this application;

[0044] Figure 7 This is a schematic diagram of the structure of the support plate and limiting component disclosed in the embodiments of this application;

[0045] Figure 8 This is a schematic diagram of the normal simulation mechanism disclosed in the embodiments of this application;

[0046] Figure 9 This is a schematic diagram of the axis simulation mechanism disclosed in the embodiments of this application;

[0047] Figure 10 This is a schematic diagram of the structure for the third guide rail parallelism detection disclosed in an embodiment of this application;

[0048] Figure 11 This is a schematic diagram of the structure for the fourth guide rail parallelism detection disclosed in an embodiment of this application;

[0049] Figure 12 This is a schematic diagram of the normal parallelism detection structure disclosed in an embodiment of this application;

[0050] Figure 13 This is a schematic diagram of the structure for detecting axis parallelism disclosed in an embodiment of this application;

[0051] Figure 14 This is a flowchart of the method for detecting the parallelism of the spindle box disclosed in an embodiment of this application.

[0052] The above figures include the following reference numerals:

[0053] 10. Base; 11. Linear rail; 12. Storage slot; 20. First guide rail; 30. Second guide rail; 40. Platform adjustment mechanism; 41. Platform adjustment assembly; 411. Mounting plate; 412. Moving block; 413. Adjustment bracket; 414. First adjustment component; 4141. First bolt; 415. Second adjustment component; 4151. Second bolt; 4152. Nut; 42. Support plate; 43. Limiting assembly; 431. Limiting block; 431 0. Installation space; 50. Straightness detection mechanism; 51. Slider; 52. Mounting bracket; 521. First support rod; 522. Second support rod; 53. Measuring gauge; 60. Normal simulation mechanism; 61. First flange; 62. Normal rod; 70. Axis simulation mechanism; 71. Second flange; 72. Axis rod; 80. Spindle box; 801. First end face; 81. End face flange; 82. Lead screw flange; 83. Third guide rail; 84. Fourth guide rail. Detailed Implementation

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0057] It should be noted that the first direction in this application is the appendix. Figure 1 The direction indicated by the letter A in the middle, the second direction is the attached direction. Figure 1The direction indicated by the letter B in the middle.

[0058] As mentioned in the background section, in existing technologies, the normal of the spindle box mounting end face, the axis of the lead screw, and the detection reference of the spindle box guide rail are different, resulting in the normal and axis not being parallel to the guide rail, thus reducing the spindle accuracy. Therefore, in order to avoid affecting the spindle accuracy, the inventors of this application have designed a novel spindle box parallelism detection device, which will be described in detail below.

[0059] See Figures 1 to 14 As shown, this application provides a spindle box parallelism detection device, hereinafter referred to as the detection device, which includes a base 10, a first guide rail 20, a second guide rail 30, a platform adjustment mechanism 40, a straightness detection mechanism 50, a normal simulation mechanism 60, and an axis simulation mechanism 70.

[0060] The base 10 is provided with a first guide rail 20 and a second guide rail 30. Along a first direction, the first guide rail 20 and the second guide rail 30 are spaced apart on the base 10 and extend along a second direction. The platform adjustment mechanism 40 includes at least two mechanisms, which are spaced apart along the second direction on the base 10 and located between the first guide rail 20 and the second guide rail 30. Each platform adjustment mechanism 40 includes a platform adjustment component 41, a support plate 42, and a limiting component 43. The support plate 42 is located on the side of the platform adjustment component 41 opposite to the base 10. The platform adjustment component 41 is used to adjust the height of the support plate 42 and the distance between the support plate 42 and the first guide rail 30. The distance between guide rail 20 and second guide rail 30 is adjusted, and the limiting component 43 is disposed on the surface of support plate 42 away from platform adjustment component 41; the straightness detection mechanism 50 is disposed on the first guide rail 20 or the second guide rail 30 to detect the parallelism between the third guide rail 83 and the first guide rail 20 of the spindle box 80, and between the fourth guide rail 84 and the second guide rail 30 of the spindle box 80; the normal simulation mechanism 60 is used to be installed on the end face flange 81 of the spindle box 80 to simulate the normal of the first end face 801; the axis simulation mechanism 70 is used to be installed on the lead screw flange 82 of the spindle box 80 to simulate the axis of the lead screw.

[0061] In this embodiment, the platform adjustment mechanism 40 includes a platform adjustment component 41, a support plate 42, and a limiting component 43. In actual manufacturing of the testing device, the first guide rail 20 and the second guide rail 30 can be installed at intervals along a first direction on the base 10. The platform adjustment component 41 is installed on the base 10 and positioned between the first guide rail 20 and the second guide rail 30. Then, the support plate 42 with the limiting component 43 is installed on the platform adjustment component 41. At this time, the spindle box 80 can be installed on the support plate 42, and the platform adjustment component 41 can adjust the height of the support plate 42 and the distance between the support plate 42 and the first guide rail 20 and the second guide rail 30. This allows adjustment of the height of the spindle box 80 and the distance between the spindle box 80 and the first guide rail 20 and the second guide rail 30, so that the third guide rail 83 and the fourth guide rail 84 of the spindle box 80 remain parallel to the first guide rail 20 and the second guide rail 30.

[0062] After installing the first guide rail 20, the second guide rail 30, and the platform adjustment mechanism 40, the straightness detection mechanism 50 can be installed on either the first guide rail 20 or the second guide rail 30. The straightness detection mechanism 50 is then used to detect the parallelism between the third guide rail 83 and the first guide rail 20 of the spindle box 80, and between the fourth guide rail 84 and the second guide rail 30 of the spindle box 80, to determine the parallelism detection benchmark. Then, the normal simulation mechanism 60 is installed on the end face flange 81 of the spindle box 80 to simulate the normal of the first end face 801, and the axis simulation mechanism 70 is installed on the lead screw flange 82 of the spindle box 80 to simulate the axis of the lead screw. Thus, the straightness detection mechanism 50 can be used to detect the parallelism between the normal and the first guide rail 20, and between the axis and the first guide rail 20, to determine whether the normal and axis of the spindle box 80 meet the required requirements. As can be seen, compared with the existing technology where the normal of the spindle box mounting end face, the axis of the lead screw, and the detection reference of the spindle box guide rail are different, this embodiment uses the first guide rail 20 as the detection reference to detect the normal of the first end face 801 of the spindle box 80, the axis of the lead screw, the parallelism of the third guide rail 83 and the fourth guide rail 84. The reference is unified, thereby improving the detection accuracy of the spindle box 80, which in turn effectively improves the detection efficiency and thus improves the accuracy of the spindle.

[0063] Further, see Figure 7As shown, the platform adjustment assembly 41 in this embodiment includes a mounting plate 411, a movable block 412, an adjustment bracket 413, a first adjustment component 414, and a second adjustment component 415. The movable block 412 is movably disposed on the side of the mounting plate 411 opposite to the base 10, and a support plate 42 is disposed on the movable block 412. Two adjustment brackets 413 are spaced apart along a first direction on both sides of the mounting plate 411. The first adjustment component 414 is disposed on the two adjustment brackets 413 and connected to the movable block 412. The first adjustment component 414 adjusts the position of the movable block 412 to adjust the distance between the support plate 42 and the first guide rail 20 and the second guide rail 30. At least one second adjustment component 415 is disposed on the side of the movable block 412 opposite to the mounting plate 411, and the second adjustment component 415 is used to adjust the height of the support plate 42. As can be seen from the above, when the spindle box 80 is mounted on the support plate, the moving block 412 can be controlled to reciprocate along the first direction by the first adjusting component 414 to adjust the distance between the spindle box 80 and the first guide rail 20 and the second guide rail 30, and the height of the spindle box 80 on the support plate 42 can be controlled by the second adjusting component 415. With this configuration, when it is detected that the third guide rail 83 is not parallel to the first guide rail 20, the position of the spindle box 80 can be adjusted by the first adjusting component 414 and the second adjusting component 415 according to the offset direction and offset of the third guide rail 83, so that the third guide rail 83 of the spindle box 80 remains parallel to the first guide rail 20. When the fourth guide rail 84 is not parallel to the first guide rail 20, the position of the spindle box 80 can also be adjusted by the first adjusting component 414 and the second adjusting component 415. The structure is simple, the operation is convenient, and it is easy to implement. In addition, the second adjustment component 415 can also support the support plate 42, effectively improving the support strength of the platform adjustment mechanism 40 to the spindle box 80.

[0064] As can be seen, the cooperation between the first adjusting component 414 and the second adjusting component 415 in this embodiment not only provides a support point for the support plate 42, but also allows the first adjusting component 414 to adjust the horizontal angle between the third guide rail 83 and the fourth guide rail 84 on the spindle box 80 and the first guide rail 20 or the second guide rail 30, and the second adjusting component 415 to adjust the vertical angle between the third guide rail 83 and the fourth guide rail 84 on the spindle box 80 and the first guide rail 20 or the second guide rail 30.

[0065] Specifically, in this embodiment, the adjustment bracket 413 is connected to the mounting plate 411 by bolts, screws, studs, or other locking components.

[0066] Specifically, see Figure 6 As shown, the second adjustment component 415 includes two components, which are disposed on the moving block 412. (See also...) Figure 1 as well as Figures 3 to 5 As shown, the platform adjustment assembly 41 in this embodiment includes two components, which are spaced apart on the base 10 along the second direction. Therefore, this embodiment includes four second adjustment components 415, thus providing more support points for the support plate 42 and ensuring the stability of the support plate 42 on the platform adjustment assembly 41. It is understood that this embodiment may also include three or more platform adjustment assemblies 41; any other modifications within the scope of this application are within the protection scope of this application.

[0067] Specifically, in this embodiment, the first adjusting component 414 includes a first bolt 4141, which is rotatably mounted on the adjusting bracket 413 and extends through the adjusting bracket 413 to abut against the moving block 412, thereby driving the moving block 412 to reciprocate along a first direction. The second adjusting component 415 includes a second bolt 4151 and a nut 4152, which is mounted on the moving block 412. The moving block 412 has a threaded hole adapted to the second bolt 4151. The second bolt 4151 is connected to the nut 4152 and rotatably mounted in the threaded hole. The support plate 42 has a limiting groove (not shown in the figures) adapted to the second bolt 4151. The existence of the limiting groove can ensure the stability of the support plate 42 mounted on the second bolt 4151, thereby preventing the support plate 42 from displacing relative to the second bolt 4151, and thus ensuring that the spindle box 80 will not shift on the support plate 42. In this embodiment, a straightness detection mechanism 50 is used to detect the parallelism between the third guide rail 83 and the first guide rail 20 on the spindle box 80. Since there are two adjusting brackets 413, there are also two first bolts. When it is detected that the third guide rail 83 and the first guide rail 20 are not parallel, the spindle box 80 and the support plate 42 are removed, and the first bolt 4141 on one of the adjusting brackets 413 is loosened. At this time, the loosened first bolt 4141 does not abut against the moving block 412, so as to provide space for the moving block 412 to move. The first bolt 4141 on the other adjusting bracket abuts against the moving block 412. When the first bolt 4141 is rotated, it is gradually tightened on the adjusting bracket 413 and pushes the moving block 412 to move towards the other end, thereby adjusting the position of the moving block 412 in the first direction, and thus adjusting the distance between the spindle box 80 and the first guide rail 20 and the second guide rail 30. Meanwhile, the two second bolts 4151 can be rotated to adjust their height on the moving block 412, thereby adjusting the tilt of the spindle box 80 on the support plate 42.

[0068] After adjustment, the support plate 42 and spindle box 80 are placed back on the platform adjustment assembly 41, and the parallelism between the third guide rail 83 and the first guide rail 20 on the spindle box 80 is re-tested using the straightness detection mechanism 50. It is evident that the presence of the first adjustment component 414 and the second adjustment component 415 is particularly important for the parallelism detection benchmark in this embodiment. They ensure the parallelism between the third guide rail 83 and the first guide rail 20, as well as between the fourth guide rail 84 and the first guide rail 20, effectively guaranteeing the consistency of the spindle box 80's detection benchmark and improving the spindle's accuracy to a certain extent.

[0069] In an embodiment not shown in this application, a slide rail is provided on one of the mounting plate 411 and the moving block 412, and a groove adapted to the slide rail is provided on the other. Through the cooperation of the slide rail and the groove, the moving block 412 reciprocates on the mounting plate 411 in a first direction to adjust the distance between the spindle box 80 and the first guide rail 20 and the second guide rail 30. A lifting rod is provided on the moving block 412, and a drive mechanism is used to drive the lifting rod to rise or fall to adjust the height of the spindle box 80.

[0070] Furthermore, in this embodiment, a linear guide 11 is provided on one of the mounting plate 411 and the base 10, and a sliding groove (not shown in the accompanying drawings) adapted to the linear guide 11 is provided on the other, and both the linear guide 11 and the sliding groove extend along the second direction. See also Figure 2 As shown, in this embodiment, the linear guide 11 is mounted on the base 10, and the sliding groove is mounted on the mounting plate 411. This allows the platform adjustment component 41 to reciprocate along the linear guide 11 in the second direction, facilitating adjustment of the platform adjustment component 41's position on the base 10 to accommodate spindle boxes 80 of different lengths. The structure is simple, easy to install, and highly versatile. Furthermore, the support plate 42 can be replaced according to the specifications of the spindle box 80 to be tested.

[0071] Furthermore, in this embodiment, the limiting component 43 is a limiting block 431. The limiting block 431 includes at least two blocks, which are spaced apart on the support plate 42 along a first direction or a second direction. The at least two limiting blocks 431 enclose an installation space 4310, within which the spindle box 80 is installed. See also... Figure 4 as well as Figure 7As shown, this embodiment includes seven limiting blocks 431, which are mounted on the support plate 42 and located at the outer edge of the spindle box 80. The presence of the limiting blocks 431 can limit the spindle box 80, preventing displacement of the support plate 42 to a certain extent. It is understood that this embodiment may also include three or more limiting blocks 431, and any other variations within the concept of this application are within the protection scope of this application. In addition, the limiting blocks 431 may be integrally formed with the support plate 42 or fixed to the support plate 42 by bolts or snap-fits.

[0072] Further, see Figure 1 As shown, the straightness detection mechanism 50 in this embodiment includes a slider 51, a mounting bracket 52, and a measuring gauge 53. The slider 51 is movably mounted on the first guide rail 20 or the second guide rail 30; the mounting bracket 52 is rotatably mounted on the slider 51 and slides along the first guide rail 20 or the second guide rail 30 under the action of the slider 51; the measuring gauge 53 is rotatably mounted on the mounting bracket 52 to detect the parallelism between the third guide rail 83 and the first guide rail 20 of the spindle box 80, and between the fourth guide rail 84 and the second guide rail 30 of the spindle box 80, under the action of the slider 51. It should be noted that in this embodiment, the first guide rail 20 and the second guide rail 30 are both linear rails. The first guide rail 20 and the second guide rail 30 are both mounted on the base 10 by bolts, and their sides are provided with side plates to fix the linear rails. The mounting bracket 52 is a universal bracket, which can rotate in all directions. It is mounted on the slider 51 by bolts or a magnetic base. The measuring instrument 53 includes a dial indicator and a micrometer indicator. In this embodiment, the measuring instrument 53 is a micrometer indicator. The working principle of the micrometer indicator is that the small linear movement of the measuring rod caused by the measured dimension is amplified by gear transmission and transformed into the rotation of the indicator on the scale, thereby reading the size of the measured dimension. It has high accuracy, simple equipment, multi-point detection, and stable and reliable measurement results. As can be seen, in this embodiment, the dial indicator is mounted on a universal bracket. The direction of the dial indicator can be changed by rotating the universal bracket, so that the dial indicator can detect the parallelism between the third guide rail 83, the fourth guide rail 84, the normal rod 62, and the axis rod 72 and the first guide rail 20 or the second guide rail 30 under the sliding of the slider 51. It has high sensitivity and strong flexibility.

[0073] Further, see Figure 1 As shown, the mounting bracket 52 in this embodiment includes a first support rod 521 and a second support rod 522. The first support rod 521 is rotatably mounted on the slider 51; one end of the second support rod 522 is rotatably mounted at the end of the first support rod 521 away from the slider 51, and the measuring gauge 53 is rotatably mounted at the end of the second support rod 522 away from the first support rod 521. (Combined with...) Figures 10 to 13 As shown, this embodiment allows the first support rod 521 and the second support rod 522 to be rotated at multiple angles, enabling the measuring instrument 53 to present different angles during the measurement process to adapt to different targets. The structure is simple and easy to implement.

[0074] Further, see Figure 8 As shown, the normal simulation mechanism 60 in this embodiment includes a first flange 61 and a normal rod 62. The first flange 61 is detachably mounted on the end face flange 81, and the normal rod 62 is vertically disposed on the first flange 61. That is, the mounting plane of the first flange 61 is adapted to the end face flange 81 of the spindle box 80, and the normal rod 62 is perpendicular to the mounting plane of the first flange 61. In this way, the normal rod 62 can be used to simulate the axis of the first end face 801 of the spindle box 80, and the parallelism between the normal rod 62 and the first guide rail 20 can be detected by the straightness detection mechanism 50. In addition, in this embodiment, the normal rod 62 is annular, cylindrical, or prismatic, and the normal rod 62 can be integrally formed with the first flange 61 or can be a separate structure.

[0075] Further, see Figure 9 As shown, the axis simulation mechanism 70 in this embodiment includes a second flange 71 and an axis rod 72. The second flange 71 is detachably mounted on the lead screw flange 82, and the axis rod 72 is vertically disposed on the second flange 71. That is, the mounting plane of the second flange 71 is adapted to the lead screw flange 82, and the axis rod 72 is perpendicular to the mounting plane of the second flange 71. In this way, the axis rod 72 can be used to simulate the axis of the lead screw, and the straightness detection mechanism 50 can be used to detect the parallelism between the axis rod 72 and the first guide rail 20. In addition, in this embodiment, the axis rod 72 is annular, cylindrical, or prismatic, and the axis rod 72 can be integrally formed with the second flange 71 or be a separate structure.

[0076] On the other hand, this application also provides a method for detecting the parallelism of a spindle box, hereinafter referred to as the detection method. This detection method is performed using the aforementioned spindle box parallelism detection device. Therefore, this detection method includes all the technical effects of the aforementioned spindle box parallelism detection device. Since the technical effects of the spindle box parallelism detection device have been described in detail above, they will not be repeated here.

[0077] Further, see Figure 14 As shown, the method for detecting the parallelism of the spindle box in this embodiment includes:

[0078] Step S1: Install the spindle box 80 on the support plate 42 and within the installation space 4310; install the normal simulation mechanism 60 on the end face flange 81 of the spindle box 80; and install the axis simulation mechanism 70 on the lead screw flange 82 of the spindle box 80.

[0079] Step S2: Install slider 51 on the first guide rail 20 or the second guide rail 30 and slide it along the first guide rail 20 or the second guide rail 30 to use measuring dial 53 to detect the parallelism between the third guide rail 83 and the first guide rail 20 and the fourth guide rail 84 and the second guide rail 30 on the spindle box 80. If the third guide rail 83 and the first guide rail 20 and the fourth guide rail 84 and the second guide rail 30 on the spindle box 80 are not parallel, use platform adjustment component 41 to adjust the height of the spindle box 80 and the distance between the spindle box 80 and the first guide rail 20 and the second guide rail 30. Then use measuring dial 53 to detect the parallelism between the third guide rail 83 and the first guide rail 20 and the fourth guide rail 84 and the second guide rail 30 until the third guide rail 83 and the first guide rail 20 and the fourth guide rail 84 and the second guide rail 30 are parallel.

[0080] Step S3: Move the measuring dial 53 to the normal simulation mechanism 60 or the axis simulation mechanism 70, push the slider 51 to slide on the first guide rail 20, and use the measuring dial 53 to detect the parallelism between the normal rod 62 and the first guide rail 20 and the parallelism between the axis rod 72 and the first guide rail 20.

[0081] Specifically, step S2 can determine the detection benchmark of this embodiment. The first guide rail 20 and the second guide rail 30 in this embodiment have high machining accuracy. By detecting the parallelism between the third guide rail 83 and the first guide rail 20, and the parallelism between the fourth guide rail 84 and the second guide rail 30, the third guide rail 83 and the fourth guide rail 84 of the spindle box 80 are made to be in a parallel state, which facilitates the subsequent measurement of the normal and axis.

[0082] Specifically, based on step S2, step S3 detects the parallelism between the normal rod 62 and the first guide rail 20, as well as the parallelism between the axis rod 72 and the first guide rail 20, to determine whether the normal and axis of the spindle box 80 to be tested meet the requirements, so that the spindle box 80 can run stably on the machine tool and effectively improve the spindle accuracy.

[0083] Specifically, in step S3, if the parallelism between the normal rod 62 and the first guide rail 20 or the parallelism between the axis rod 72 and the first guide rail 20 does not meet the requirements, the spindle box 80 is reworked and steps S1 to S3 are repeated until the parallelism between the normal rod 62 and the first guide rail 20 or the parallelism between the axis rod 72 and the first guide rail 20 meets the requirements.

[0084] It is worth noting that whether the parallelism meets the requirements refers to whether the difference in parallelism between the two structures is within a preset difference value. If it is within the preset difference value, the two structures are considered parallel; if it is not within the preset difference value, the spindle box needs to be reworked. In this application, the preset difference value is not specifically limited and can be set according to the machining accuracy of the spindle box 80 or determined based on experimental results. This application will not elaborate on this preset difference value.

[0085] The operation steps will be described in detail below based on specific embodiments.

[0086] The first step is to install the first flange 61 of the normal simulation mechanism 60 onto the end face flange 81 of the spindle box 80 to be tested, and to install the second flange 71 of the axis simulation mechanism 70 onto the lead screw flange 82 of the spindle box 80 to be tested.

[0087] The second step is to adjust the relative distance between the two platform adjustment components 41 by the cooperation between the linear guide 11 on the base 10 and the sliding groove on the mounting plate 411, so as to adapt to the length of the spindle box 80 to be tested. Then, the support plate 42 adapted to the spindle box 80 to be tested is installed on the second bolt 4151 in the second adjustment component 415 through the limiting groove to fix the support plate 42.

[0088] The third step is to hoist the spindle box 80 to be tested onto the support plate 42, so that the spindle box 80 to be tested is engaged between the limiting blocks 431.

[0089] Fourth, install the straightness testing mechanism 50 on the first guide rail 20. Then, move the slider 51, which is equipped with a dial indicator and a universal joint, to one end of the first guide rail 20. Adjust the position and angle of the dial indicator using the universal joint so that the dial indicator is perpendicular to the side of the third guide rail 83 of the spindle box 80 to be tested. At this time, the pointer of the dial indicator is close to the upper side of the third guide rail 83. Then, push the slider 51 to move to the other end of the first guide rail 20. Observe and record the dial indicator reading during the movement. Based on the data recorded by the dial indicator, perform... Statistical analysis is performed to determine whether the parallelism of the projection lines of the first guide rail 20 and the third guide rail 83 in the horizontal plane is within a predetermined range. If they are parallel, proceed to the next step. If they are not parallel, first remove the spindle box 80 and support plate 42 to be tested. Then, based on the offset direction and amount of the third guide rail 83, adjust the offset of the spindle box 80 to be tested using the first bolt 4141 and the second bolt 4151 in the platform adjustment assembly 41 to correct the projection of the third guide rail 83 in the horizontal plane. Then, repeat the third and fourth steps. A schematic diagram of the parallelism detection structure for the third guide rail 83 is shown below. Figure 10 As shown.

[0090] Fifth step: Move the slider 51, equipped with a dial indicator and a universal joint, to one end of the first guide rail 20. Adjust the position and angle of the dial indicator using the universal joint so that it is perpendicular to the top surface of the third guide rail 83 of the spindle box 80 to be measured. At this point, the pointer of the dial indicator should be close to the upper surface of the third guide rail 83. Then, push the slider 51 to the other end of the first guide rail 20. Observe and record the dial indicator readings during the movement. Perform statistical analysis based on the data recorded by the dial indicator readings to determine the relationship between the first guide rail 20 and the third guide rail 83. If the parallelism of the projection line of rail 83 in the horizontal plane is within a predetermined range, proceed to the next step. If not, first remove the spindle box 80 and support plate 42 to be tested. Then, based on the offset direction and amount of the third guide rail 83, use the first bolt 4141 and the second bolt 4151 in the platform adjustment assembly 41 to adjust the offset of the spindle box 80 to be tested, thereby correcting the projection of the third guide rail 83 in the horizontal plane. Then, install the support plate 42, and repeat steps three and five. See the structural schematic diagram for the parallelism detection of the third guide rail 83. Figure 10 As shown.

[0091] Step 6: Move slider 51 to the normal simulation mechanism 60, and place the dial indicator pointer against one end of the normal rod 62. Push slider 51 towards the other end of the normal rod 62. Observe and record the dial indicator reading during the movement. Perform statistical analysis based on the dial indicator reading records to determine whether the parallelism between the first guide rail 20 and the normal rod 62 meets the requirements. If it does not meet the requirements, rework the spindle box 80 and repeat steps 1 to 6. If it meets the requirements, proceed to the next step. See the schematic diagram of the normal parallelism detection structure. Figure 12 As shown.

[0092] Step 7: Move slider 51 to the axis simulation mechanism 70, place the dial indicator pointer against one end of the axis rod 72, and push slider 51 to the other end of the axis rod 72. Observe and record the dial indicator reading during the movement. Perform statistical analysis based on the dial indicator reading records to determine whether the parallelism between the first guide rail 20 and the axis rod 72 meets the requirements. If it does not meet the requirements, rework is required. Then, rework the spindle box 80 and repeat steps 1 to 7. If it meets the requirements, proceed to the next step. See the schematic diagram of the axis parallelism detection structure. Figure 13 As shown.

[0093] Step 8: Install the straightness testing mechanism 50 on the second guide rail 30. Then, move the slider 51, which is equipped with a dial indicator and a universal bracket, to one end of the second guide rail 30. Adjust the position and angle of the dial indicator using the universal bracket so that the dial indicator is perpendicular to the side of the fourth guide rail 84 of the spindle box 80 to be tested. At this time, the pointer of the dial indicator is close to the upper side of the fourth guide rail 84. Then, push the slider 51 to move to the other end of the second guide rail 30. Observe and record the dial indicator reading during the movement. Based on the data recorded by the dial indicator reading, proceed... Statistical analysis is performed to determine whether the parallelism of the projection lines of the second guide rail 30 and the fourth guide rail 84 in the horizontal plane meets the requirements. If it does, proceed to the next step; otherwise, remove the spindle box 80 and support plate 42. Then, based on the offset direction and amount of the fourth guide rail 84, adjust the offset of the spindle box 80 using the first bolt 4141 and the second bolt 4151 in the platform adjustment assembly 41 to correct the projection of the fourth guide rail 84 in the horizontal plane. Then, repeat steps three and eight. A schematic diagram of the parallelism detection structure for the fourth guide rail 84 is shown below. Figure 11 As shown.

[0094] Step 9: Move the slider 51, equipped with a dial indicator and a universal joint, to one end of the second guide rail 30. Adjust the position and angle of the dial indicator using the universal joint so that it is perpendicular to the top surface of the fourth guide rail 84 of the spindle box 80 to be measured. At this point, the pointer of the dial indicator should be close to the upper surface of the fourth guide rail 84. Then, push the slider 51 to the other end of the second guide rail 30. Observe and record the dial indicator readings during the movement. Perform statistical analysis based on the data recorded by the dial indicator readings to determine the relationship between the second guide rail 30 and the second guide rail 80. If the parallelism of the projection lines of the four guide rails 84 in the horizontal plane meets the requirements, proceed to the next step if they are parallel. If they are not parallel, first remove the spindle box 80 and support plate 42 to be tested. Then, based on the offset direction and amount of the fourth guide rail 84, use the first bolt 4141 and the second bolt 4151 in the platform adjustment assembly 41 to adjust the offset of the spindle box 80 to be tested, so as to correct the projection of the fourth guide rail 84 in the horizontal plane. Then, install the support plate 42, and repeat steps three and nine. See the structural schematic diagram for the parallelism detection of the fourth guide rail 84. Figure 11 As shown.

[0095] Step 10: Remove the normal simulation mechanism 60 and the axis simulation mechanism 70 and place them in the storage slot 12 of the base 10. Then lift out the spindle box 80 to complete the test.

[0096] In summary, the spindle box parallelism detection device of this application has the following advantages:

[0097] (1) The first guide rail and the third and fourth guide rails on the spindle box are leveled by the platform adjustment component. With the first guide rail as the reference, the parallelism between the normal line of the end face of the spindle box, the normal line of the lead screw and the third and fourth guide rails on the spindle box is detected. The reference is unified, the detection accuracy is high and the detection efficiency is high.

[0098] (2) By using the normal simulation mechanism and the axis simulation mechanism, the end face normal and the lead screw axis of the spindle box can be simulated. With the first guide rail as the reference, the perpendicularity of the spindle box guide rail and the end face (this result can be obtained from the parallelism between the normal and the first guide rail) and the parallelism of the lead screw axis can be quickly detected. The structure is simple and the detection is fast and convenient.

[0099] (3) The spacing between multiple platform adjustment components can be adjusted, and with the support plate, it can be adapted to spindle boxes of different lengths. The normal simulation mechanism and axis simulation mechanism can also be adapted to various spindle boxes, which is highly versatile and has a wide range of applications.

[0100] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0101] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0102] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for detecting the parallelism of a spindle box, characterized in that, include: A base (10) is provided with a first guide rail (20) and a second guide rail (30). Along a first direction, the first guide rail (20) and the second guide rail (30) are spaced apart on the base (10) and extend along a second direction. A platform adjustment mechanism (40) is provided, comprising at least two platforms, which are spaced apart along the second direction on the base (10) and located between the first guide rail (20) and the second guide rail (30). The platform adjustment mechanism (40) includes a platform adjustment component (41), a support plate (42), and a limiting component (43). The support plate (42) is disposed on the side of the platform adjustment component (41) away from the base (10). The platform adjustment component (41) is used to adjust the height of the support plate (42) and the distance between the support plate (42) and the first guide rail (20) and the second guide rail (30). The limiting component (43) is disposed on the surface of the support plate (42) away from the platform adjustment component (41). A straightness detection mechanism (50) is provided on the first guide rail (20) or the second guide rail (30) to detect the parallelism between the third guide rail (83) of the spindle box (80) and the first guide rail (20), and between the fourth guide rail (84) of the spindle box (80) and the second guide rail (30). A normal simulation mechanism (60) is used to be installed on the end face flange (81) of the spindle box (80) to simulate the normal of the first end face (801); A spindle axis simulation mechanism (70) is used to be mounted on the lead screw flange (82) of the spindle box (80) to simulate the axis of the lead screw.

2. The spindle box parallelism detection device according to claim 1, characterized in that, The platform adjustment component (41) includes: Mounting plate (411); A movable block (412) is movably disposed on the side of the mounting plate (411) away from the base (10), and a support plate (42) is disposed on the movable block (412); Adjustment bracket (413), the adjustment bracket (413) includes two, the two adjustment brackets (413) are spaced apart on both sides of the mounting plate (411) along the first direction; The first adjustment component (414) is disposed on the two adjustment brackets (413) and connected to the moving block (412). The first adjustment component (414) adjusts the position of the moving block (412) to adjust the distance between the support plate (42) and the first guide rail (20) and the second guide rail (30). The second adjustment component (415) includes at least one, and at least one of the second adjustment components (415) is disposed on the side of the moving block (412) away from the mounting plate (411), and the second adjustment component (415) is used to adjust the height of the support plate (42).

3. The spindle box parallelism detection device according to claim 2, characterized in that, The first adjusting component (414) includes a first bolt (4141), which is rotatably mounted on the adjusting bracket (413) and passes through the adjusting bracket (413) to abut against the moving block (412) so as to drive the moving block (412) to reciprocate along the first direction; The second adjusting component (415) includes a second bolt (4151) and a nut (4152). The nut (4152) is disposed on the moving block (412). The moving block (412) is provided with a threaded hole adapted to the second bolt (4151). The second bolt (4151) is connected to the nut (4152) and is rotatably disposed in the threaded hole. The support plate (42) is provided with a limiting groove adapted to the second bolt (4151).

4. The spindle box parallelism detection device according to claim 2, characterized in that, A linear guide (11) is provided on one of the mounting plate (411) and the base (10), and a sliding groove adapted to the linear guide (11) is provided on the other, and both the linear guide (11) and the sliding groove extend along the second direction.

5. The spindle box parallelism detection device according to claim 1, characterized in that, The limiting component (43) is a limiting block (431), and the limiting block (431) includes at least two. The at least two limiting blocks (431) are spaced apart on the support plate (42) along the first direction or along the second direction. The at least two limiting blocks (431) surround and form an installation space (4310). The spindle box (80) is installed in the installation space (4310).

6. The spindle box parallelism detection device according to claim 1, characterized in that, The straightness testing mechanism (50) includes: A slider (51) is movably disposed on the first guide rail (20) or the second guide rail (30); Mounting bracket (52), which is rotatably mounted on the slider (51) and slides along the first guide rail (20) or the second guide rail (30) under the drive of the slider (51); A measuring gauge (53) is rotatably mounted on the mounting bracket (52) to detect the parallelism between the third guide rail (83) and the first guide rail (20) of the spindle box (80) and between the fourth guide rail (84) and the second guide rail (30) of the spindle box (80) under the action of the slider (51).

7. The spindle box parallelism detection device according to claim 6, characterized in that, The mounting bracket (52) includes: A first support rod (521) is rotatably mounted on the slider (51); The second support rod (522) is rotatably disposed at one end of the first support rod (521) away from the slider (51), and the measuring instrument (53) is rotatably disposed at the end of the second support rod (522) away from the first support rod (521).

8. The device for detecting the parallelism of the spindle box according to any one of claims 1 to 7, characterized in that, The normal simulation mechanism (60) includes a first flange (61) and a normal rod (62). The first flange (61) is detachably mounted on the end face flange (81), and the normal rod (62) is vertically arranged on the first flange (61).

9. The device for detecting the parallelism of the spindle box according to any one of claims 1 to 7, characterized in that, The axis simulation mechanism (70) includes a second flange (71) and an axis rod (72). The second flange (71) is detachably mounted on the lead screw flange (82), and the axis rod (72) is vertically arranged on the second flange (71).

10. A method for detecting the parallelism of a spindle box, characterized in that, The method for detecting the parallelism of the spindle box is performed using the spindle box parallelism detection device as described in any one of claims 1 to 9, and the method for detecting the parallelism of the spindle box includes: Step S1: Install the spindle box (80) on the support plate (42) and within the installation space (4310), install the normal simulation mechanism (60) on the end face flange (81) of the spindle box (80), and install the axis simulation mechanism (70) on the lead screw flange (82) of the spindle box (80); Step S2: Install the slider (51) on the first guide rail (20) or the second guide rail (30) and slide it along the first guide rail (20) or the second guide rail (30) to use the measuring gauge (53) to detect the parallelism between the third guide rail (83) and the first guide rail (20) and the fourth guide rail (84) and the second guide rail (30) on the spindle box (80). When the third guide rail (83) and the first guide rail (20) and the fourth guide rail (84) and the second guide rail (30) on the spindle box (80) are parallel, the parallelism between the third guide rail (83) and the first guide rail (20) and the fourth guide rail (84) and the second guide rail (30) on the spindle box (80) is detected. (30) If they are not parallel, the platform adjustment component (41) is used to adjust the height of the spindle box (80) and the distance between the spindle box (80) and the first guide rail (20) and the second guide rail (30). Then, the measuring instrument (53) is used to check the parallelism between the third guide rail (83) and the first guide rail (20) and the fourth guide rail (84) and the second guide rail (30) until the third guide rail (83) and the first guide rail (20) and the fourth guide rail (84) and the second guide rail (30) are parallel. Step S3: Move the measuring instrument (53) to the normal simulation mechanism (60) or the axis simulation mechanism (70), push the slider (51) to slide on the first guide rail (20), and use the measuring instrument (53) to detect the parallelism between the normal rod (62) and the first guide rail (20) and the parallelism between the axis rod (72) and the first guide rail (20).

11. The method for detecting the parallelism of the spindle box according to claim 10, characterized in that, In step S3, if the parallelism between the normal rod (62) and the first guide rail (20) or the parallelism between the axis rod (72) and the first guide rail (20) does not meet the requirements, the spindle box (80) is reworked and steps S1 to S3 are repeated until the parallelism between the normal rod (62) and the first guide rail (20) or the parallelism between the axis rod (72) and the first guide rail (20) meets the requirements.

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