Main shaft assembly detection device of numerical control machine tool

Abstract

The main shaft assembly detection device of the numerical control machine tool comprises an assembly base (101), a main shaft (102) and a detection mechanism (200), an operator rotates a second circular ring (203) to enable two sets of first guide rods (206) to generate height difference, and whether the installation concentricity of the main shaft (102) meets the requirement or not is judged according to the length, extending out of a second guide sleeve (214), of a second guide rod (213).

Description

Technical Field

[0001] The invention relates to the field of numerical control machine tool assembly, in particular to a spindle assembly detection device for numerical control machine tools. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. After calculation and processing, the CNC device sends out various control signals to control the movement of the machine tool and automatically processes parts according to the shape and size required by the drawing.

[0003] Since the processing accuracy of CNC machine tools directly determines the quality level of CNC machine tools during the processing of workpieces, strict installation quality monitoring is required during the assembly process of CNC machine tools.

[0004] The spindle installation of CNC machine tools directly affects the processing quality of CNC machine tools, so the detection and monitoring of the spindle assembly of CNC machine tools is particularly important; the current method of detecting the concentricity of the spindle assembly of CNC machine tools is to use special measuring tools to measure and calculate the verticality between the spindle and the installation surface. This measurement method has the following defects: 1. The operator measures the verticality of multiple directions and angles around the spindle, which is cumbersome; 2. After measuring the verticality of multiple angles, it is necessary to record and calculate, and finally obtain the accurate inclination of the spindle. This method is prone to errors caused by operation and calculation errors;

[0005] In view of the above technical problems, the present invention designs a spindle assembly detection device for a CNC machine tool, which can calculate the spindle inclination through one measurement, thereby simplifying the operation process. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a spindle assembly detection device for a numerically controlled machine tool which is easy to operate and more accurate.

[0007] The present invention discloses a spindle assembly detection device for a numerically controlled machine tool, comprising an assembly base, a spindle, and a detection mechanism, wherein the detection mechanism comprises a first circular ring, a first annular groove, a second circular ring, a first guide sleeve, a first guide rod, a first limit plate, a first spring, a first roller, a first connecting rod, a first sleeve, a second connecting rod, a second guide rod, and a second guide sleeve;

[0008] The main shaft is coaxially connected to the first ring, the first ring has an outer circumferential surface annularly provided with the first annular groove, the first annular groove is provided with the second ring rotating along the ring, the outer circumferential surface of the second ring is fixedly connected to the first guide sleeve, the first guide sleeve is provided with the first guide rod moving along the ring, one end of the first guide rod is coaxially fixed to the first limiting plate, the first limiting plate is fixedly connected to one end of the first spring, the other end of the first spring is fixedly connected to the upper surface of the first guide sleeve, the other end of the first limiting plate is provided with the first roller via a bearing, and the first roller can overlap the upper surface of the assembly base;

[0009] The first limit plate is fixedly connected to the middle part of the first connecting rod, and the first sleeve is installed on one end of the first connecting rod through a bearing. The structure composed of the first guide sleeve, the first guide hole, the first guide rod, the first limit plate, the first spring, the first roller, the first connecting rod and the first sleeve is symmetrically distributed in two groups about the center of the main axis. The first sleeve of the first group is fixedly connected to one end of the second connecting rod, and the other end of the second connecting rod is coaxially fixed with one end of the second guide rod. The second guide rod is arranged in the second guide sleeve and moves along it, and one end of the second guide sleeve is fixedly connected to the first sleeve of the second group.

[0010] The present invention provides a spindle assembly detection device for a numerically controlled machine tool, wherein the second guide rod can be marked with a scale.

[0011] The present invention provides a spindle assembly detection device for a numerically controlled machine tool, wherein the cross-sectional shape of the first guide rod can be a square, and the cross-sectional shape of the first guide hole is a square matching the cross-sectional shape of the first guide rod.

[0012] The present invention provides a spindle assembly detection device for a numerically controlled machine tool, wherein the first spring is always in a stretched state during the detection process.

[0013] The present invention provides a spindle assembly detection device for a numerically controlled machine tool, wherein the structure composed of the second connecting rod, the second guide rod and the second guide sleeve is symmetrically distributed in two groups about the center of the first guide rod.

[0014] The present invention provides a spindle assembly and detection device for a CNC machine tool, wherein the assembly base is fixedly connected to the CNC machine tool, the spindle is installed and fixedly connected to the assembly base, the spindle is detachably fixedly installed to one end of multiple transverse axes, and the other ends of the multiple transverse axes are fixedly connected to the first circular ring.

[0015] The spindle assembly detection device of a CNC machine tool of the present invention is different from the prior art in that:

[0016] 1. The spindle assembly detection device of a CNC machine tool of the present invention avoids the operator from performing verticality measurements at multiple positions and angles around the spindle, and completes the verticality measurement at one time by means of circular rotation, thereby reducing the operation steps and operation process and improving work efficiency;

[0017] 2. The spindle assembly detection device for a CNC machine tool of the present invention uses direct reading to determine the maximum inclination of the spindle after installation, avoiding measurement and having higher accuracy.

[0018] The spindle assembly detection device for a CNC machine tool of the present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a spindle assembly detection device for a CNC machine tool;

[0020] Figure 2 yes Figure 1 A side view of a spindle assembly detection device for a CNC machine tool is shown;

[0021] Figure 3 yes Figure 1 The isometric view shown;

[0022] Figure 4 is along Figure 1 Sectional view along line AA;

[0023] Figure 5 yes Figure 1 Component disassembly diagram;

[0024] Figure 6 is along Figure 2 Sectional view along the mid-DD line;

[0025] Figure 7 is along Figure 2 Partial cross-sectional view of the middle BB line;

[0026] Figure 8 yes Figure 1 an axonometric view of the first component;

[0027] Fig. 9 yes Figure 1 A front view of the second component;

[0028] Fig.10 is along Fig. 9 Sectional view along the CC line. DETAILED DESCRIPTION

[0029] like Figures 1 to 5As shown, a spindle assembly detection device for a CNC machine tool of the present invention includes an assembly base 101, a spindle 102, and a detection mechanism 200. The operator rotates the second ring 203 to create a height difference between the two groups of first guide rods 206, and determines whether the installation concentricity of the spindle 102 meets the requirements based on the length of the second guide rod 213 extending out of the second guide sleeve 214.

[0030] The detection mechanism 200 includes a first ring 201, a first annular groove 202, a second ring 203, a first guide sleeve 204, a first guide rod 206, a first limit plate 207, a first spring 208, a first roller 209, a first connecting rod 210, a first sleeve 211, a second connecting rod 212, a second guide rod 213, and a second guide sleeve 214;

[0031] The main shaft 102 is coaxially connected with the first circular ring 201. The first circular ring 201 has an outer circumferential surface provided with the first circular groove 202. The first circular groove 202 has the second circular ring 203 disposed therein for rotation thereon. The outer circumferential surface of the second circular ring 203 is fixedly connected with the first guide sleeve 204. The first guide sleeve 204 has the first guide rod 206 disposed therein for movement thereon. One end of the first guide rod 206 is coaxially fixed with the first limiting plate 207. The first limiting plate 207 is fixedly connected with one end of the first spring 208. The other end of the first spring 208 is fixedly connected with the upper surface of the first guide sleeve 204. The other end of the first limiting plate 207 is provided with the first roller 209 via a bearing. The first roller 209 can overlap with the upper surface of the assembly base 101.

[0032] The first limiting plate 207 is fixedly connected to the middle part of the first connecting rod 210, and the first sleeve 211 is installed on one end of the first connecting rod 210 through a bearing. The structure composed of the first guide sleeve 204, the first guide hole 205, the first guide rod 206, the first limiting plate 207, the first spring 208, the first roller 209, the first connecting rod 210, and the first sleeve 211 is symmetrically distributed in two groups about the center of the main shaft 102. The first sleeve 211 of the first group is fixedly connected to one end of the second connecting rod 212, and the other end of the second connecting rod 212 is coaxially fixed with one end of the second guide rod 213. The second guide rod 213 is arranged in the second guide sleeve 214 and moves along it, and one end of the second guide sleeve 214 is fixedly connected to the first sleeve 211 of the second group.

[0033] The present invention utilizes the overlap between the first roller 209 and the upper surface of the assembly base 101, combined with the rotation of the first roller 209 around the main shaft 102, and real-time monitoring of the telescopic length of the second guide rod 213, so as to measure the height difference between the two groups of the first rollers 209. When the maximum value of the height difference between the two groups of the first rollers 209 exceeds a preset threshold, it is determined that the installation concentricity of the main shaft exceeds the error range, otherwise the installation is qualified.

[0034] The principle and specific operation steps of the present invention to complete the detection are as follows: the first ring 201 is coaxially fixed on the main shaft 102. At this time, under the elastic force of the first spring 208, the two groups of the first rollers 209 are respectively overlapped and fitted with the upper surface of the assembly base 101. At this time, the operator starts to rotate the second ring 203. Driven by the second ring 203, the first guide hole 205, the first guide rod 206 and the first roller 209 will rotate around the axis of the main shaft 102. During the revolution of the first roller 209, the first spring 208 always ensures that the first roller 209 is in contact with the upper surface of the assembly base 101. Therefore, when the two groups of the first rollers 209 are in contact with the assembly When the upper surface of the base 101 is not perpendicular to the axis of the main shaft 102, the telescopic lengths of the two groups of the first guide rods 206 are different. At this time, the two groups of the first connecting rods 210 will produce a height difference in the axial direction of the main shaft 102, and the second guide rod 213 is dragged out of the second guide sleeve 214 by the second connecting rod 212 and the second guide sleeve 214. A preset threshold is set for the sliding length of the second guide rod 213. When the sliding length of the second guide rod 213 is less than the preset threshold, the installation concentricity of the main shaft 102 meets the requirements. Otherwise, the installation concentricity of the main shaft 102 does not meet the requirements. The method is easy to operate, and the operator can directly observe and judge, reducing measurement and calculation errors.

[0035] Among them, when the two groups of the first limit plates 207 remain flush in the axial direction of the main shaft 102, the end of the second connecting rod 212 close to the second guide sleeve 214 and the end of the second guide sleeve 214 close to the second connecting rod 212 overlap. This design can ensure that the operator can observe when the second guide rod 213 slides out slightly, thereby reducing errors caused by observation.

[0036] The first guide sleeve 204 is provided with the first guide hole 205 , and the first guide rod 206 is disposed in the first guide hole 205 and moves along the first guide hole.

[0037] For further explanation of the present invention, see Figure 5 ,

[0038] The second guide rod 213 may be marked with scale.

[0039] The present invention can facilitate operators to read and record.

[0040] For further explanation of the present invention, see Figure 3 , 4 ,

[0041] The cross-sectional shape of the first guide rod 206 can be a square, and the cross-sectional shape of the first guide hole 205 is a square matching the cross-sectional shape of the first guide rod 206 .

[0042] The present invention ensures that the first guide rod 206 can only slide axially relative to the first guide hole 205 .

[0043] During the detection process, the first spring 208 is always in a stretched state.

[0044] After the measurement work starts, the first roller 209 is always in contact with the upper surface of the assembly base 101 .

[0045] The structure consisting of the second connecting rod 212 , the second guiding rod 213 , and the second guiding sleeve 214 is symmetrically distributed in two groups about the center of the first guiding rod 206 .

[0046] The assembly base 101 is fixedly connected to the CNC machine tool, the main shaft 102 is installed and fixedly connected to the assembly base 101, the main shaft 102 is detachably fixedly installed to one end of multiple transverse axes, and the other end of the multiple transverse axes is fixedly connected to the first ring 201.

[0047] For further explanation of the present invention, see Figure 3 , 6 ,

[0048] The first ring 201 is coaxially connected to the main shaft 102 through a positioning mechanism 300, and the positioning mechanism 300 includes a first cylinder 301, a third through hole 302, a third guide rod 303, a fixing clamp 304, a second limit plate 305, a second spring 306, a first push rod 307, a first push block 308, and a second cylinder 309;

[0049] The first ring 201 and the first cylinder 301 are coaxially connected, the first cylinder 301 is provided with the third through hole 302 in the radial direction, the third through hole 302 is provided with the third guide rod 303 moving along the third through hole, one end of the third guide rod 303 is fixedly connected to the fixing clamp 304, the fixing clamp 304 can overlap the outer surface of the main shaft 102, the other end of the third guide rod 303 is fixedly connected to the second limit plate 305, the second limit plate 305 is fixedly connected to one end of the second spring 306, the other end of the second spring 306 is fixedly connected to the outer surface of the first cylinder 301;

[0050] The third guide rod 303 is fixedly connected to one end of the first push rod 307, and the other end of the first push rod 307 can overlap the outer circumference of the first push block 308. The first push block 308 is fixedly connected to the outer circumference of the second cylinder 309, and the second cylinder 309 is installed on the first cylinder 301 through a bearing.

[0051] Before using the detection mechanism 200 to detect the assembly of the main shaft 102, the present invention puts the first cylinder 301 outside the main shaft 102, determines the target fixed position of the first cylinder 301, and drives the second cylinder 309 to rotate relative to the first cylinder 301. When the outer circumferential surface of the first top block 308 and the other end of the first top rod 307 fail to overlap, at least two of the fixing clamps 304 clamp the main shaft 102, thereby determining the relative position of the first cylinder 301 and the main shaft 102, which facilitates the detection mechanism 200 to detect the assembly of the main shaft 102.

[0052] The specific implementation of the present invention is as follows: the first cylinder 301 is sleeved on the main shaft 102 and moved along the axial direction of the main shaft 102. After the target positions of the first cylinder 301 and the main shaft 102 are determined, the second cylinder 309 is rotated counterclockwise relative to the first cylinder 301 in a top view direction until the outer circumferential surface of the first ejector block 308 and the other end of the first ejector rod 307 fail to overlap, at which time the third guide rod 303 is pulled to move radially under the elastic force of the second spring 306, causing the fixing clamp 304 to overlap the outer surface of the main shaft 102. When multiple fixing clamps 304 are overlapped at the same time, that is, when the main shaft 102 is clamped, the relative position of the first cylinder 301 and the main shaft 102 is fixed.

[0053] The cross-sectional shape of the third guide rod 303 is a square, and the interface shape of the third through hole 302 is a square that matches the interface shape on the forest. The present invention ensures that the third guide rod 303 can only move relative to the third through hole 302 along its axial direction.

[0054] Among them, the surface of the fixing clamp 304 close to the main shaft 102 is fixedly installed with a rubber pad or a latex pad, so as to facilitate the clamping of the surface of the main shaft 102 by multiple fixing clamps 304.

[0055] Wherein, two second springs 306 are symmetrically distributed about the center of the third guide rod 303 , and the present invention ensures that the third guide rod 303 can slide back and forth along the third through hole 302 more smoothly.

[0056] The structure composed of the third through hole 302 , the third guide rod 303 , the fixing clamp 304 , the second limit plate 305 , the second spring 306 , and the first push rod 307 is centrally symmetrically distributed in multiple groups, preferably 2 groups, about the axis of the main shaft 102 .

[0057] Among them, the contour shape of the first top block 308 is a snail shape or a whistle shape, and its number is equal to the number of the fixing clamps 304. When the highest point of the outer surface of the first top block 308 overlaps with the other end of the first top rod 307, the fixing clamp 304 is completely separated from the outer surface of the main shaft 102.

[0058] The outer circumferential surface of the first cylinder 301 is fixedly connected to the first handle 310 , and the present invention facilitates the operator to perform relative rotation between the first cylinder 301 and the second cylinder 309 .

[0059] The outer circumferential surface of the second cylinder 309 is evenly provided with a plurality of anti-skid grooves 311 along its circumference, and the present invention facilitates the operator to perform relative rotation between the first cylinder 301 and the second cylinder 309 .

[0060] The first ring 201 and the first cylinder 301 are coaxially fixed.

[0061] For further explanation of the present invention, see Figure 5 , 7 , 8, 10,

[0062] The first ring 201 is coaxially connected to the first cylinder 301 through a control mechanism 400, and the control mechanism 400 includes a first guide groove 401, a first guide block 402, a third spring 403, a third cylinder 404, a second push rod 405, a second push block 406, and a third ring 407;

[0063] The inner circumferential surface of the first cylinder 301 is uniformly provided with a plurality of first guide grooves 401 along its circumference, and the first guide block 402 is arranged in the first guide groove 401 to move along the first guide groove, the top end of the first guide groove 401 is fixedly connected to one end of the third spring 403, the other end of the third spring 403 is fixedly connected to one end of the first guide block 402, the other end of the first guide block 402 is fixedly connected to the first ring 201, the first ring 201 is coaxially fixed with the third cylinder 404, a plurality of second push rods 405 are fixed on the inner circumferential surface of the third cylinder 404, the bottom end of the second push rod 405 overlaps with the upper surface of the second push block 406 and the third ring 407, the second push block 406 is fixedly connected to the outer circumference of the second cylinder 309, and the third ring 407 is coaxially fixed with the bottom end of the second cylinder 309.

[0064] In the present invention, during the relative rotation of the second cylinder 309 and the first cylinder 301, the bottom end of the second push rod 405 always overlaps with the upper surface of the second top block 406 and the third ring 407. When the bottom end of the second push rod 405 overlaps with the upper surface of the second top block 406, the third cylinder 404 and the first ring 201 are located at a higher position. At this time, the first roller 209 does not overlap with the upper surface of the assembly base 101. As the second cylinder 309 rotates, the upper surface of the second top block 406 overlaps with the second push rod 40 5 fails, at which time the bottom end of the second push rod 405 overlaps the upper surface of the third ring 407, the first ring 201 and the third cylinder 404 are in a lower position, and the first roller 209 overlaps the upper surface of the assembly base 101. Therefore, by rotating the second cylinder 309 relative to the first cylinder 301, on the one hand, the fixing clamp 304 can clamp the main shaft 102, and on the other hand, the third cylinder 404 and the first ring 201 can be controlled to move downward synchronously to start the detection of the assembly of the main shaft 102.

[0065] The method for starting the assembly inspection of the spindle 102 of the present invention is as follows: the second cylinder 309 is rotated relative to the first cylinder 301 until the plurality of fixing clamps 304 clamp the spindle 102, at which time the position of the first cylinder 301 relative to the spindle 102 is fixed, and due to the configuration relationship between the first guide groove 401 and the first guide block 402, the third cylinder 404 and the first ring 201 also stop rotating, and the second cylinder 309 is continuously rotated at a small angle so that the second push rod 405 The lower end of the second top block 406 fails to overlap with the upper surface of the second top block 406. At this time, under the elastic force of the third spring 403, the third cylinder 404 and the first ring 201 are pushed downward until the lower end of the second top rod 405 overlaps with the upper surface of the third ring 407. At this time, the first roller 209 has overlapped with the upper surface of the assembly base 101, and under the elastic force of the third spring 403, the first spring 208 is stretched, so that the inspection of the assembly of the main shaft 102 can be successfully completed.

[0066] The first guide groove 401 can be a dovetail guide groove, and the first guide block 402 can be a dovetail guide block. The present invention ensures synchronous rotation of the first guide groove 401 and the first guide block 402 , and the first guide block 402 can only slide back and forth axially along the first guide groove 401 .

[0067] The number of the first guide grooves 401 , the first guide blocks 402 and the third springs 403 is equal, and the number can be 3, 4, 5, 6, 7, 8, 9 or more, preferably 5.

[0068] Among them, the third spring 403 is always in a compressed state, thereby ensuring that when the overlap between the lower end of the second push rod 405 and the upper surface of the second top block 406 fails, under the action of the elastic force of the third spring 403, the third cylinder 404 and the first ring 201 can quickly slide downward until the lower end of the second push rod 405 overlaps with the upper surface of the third ring 407.

[0069] The planar unfolded shape of the second top block 406 is a right-angled trapezoid, so when the second cylinder 309 is rotated counterclockwise from a top view, the third cylinder 404 and the first ring 201 can be smoothly lifted by the construction of the second top rod 405 and the upper surface of the second top block 406.

[0070] The number of the second push rods 405 is equal to the number of the second push blocks 406 , and the number of the second push rods 405 is equal to the number of the first push blocks 308 .

[0071] In the process of rotating the second cylinder 309, the timing of the failure of the overlap between the lower end of the second push rod 405 and the upper end of the second push block 406 is slightly later than the timing of the failure of the overlap between the outer surface of the first push block 308 and the other end of the first push rod 307. The present invention ensures that after the positions of the first cylinder 301 and the main shaft 102 are relatively fixed, the detection of the assembly of the main shaft 102 is started.

[0072] The elastic force of the third spring 403 is always greater than the elastic force of the first spring 208 . The present invention ensures that during the assembly inspection of the spindle 102 , the first roller 209 is always in overlap with the upper surface of the assembly base 101 .

[0073] After the assembly inspection of the main shaft 102 is completed, the present invention continues to rotate the second cylinder 309 relative to the first cylinder 301 to ensure that the positions of the first ring 201 and the third cylinder 404 are lifted upward. At the same time, the overlap between the fixing clamp 304 and the main shaft 102 fails, which facilitates the removal of the device.

[0074] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A spindle assembly detection device for a numerically controlled machine tool, comprising an assembly base (101), a spindle (102), and a detection mechanism (200), characterized in that: The detection mechanism (200) comprises a first circular ring (201), a first annular groove (202), a second circular ring (203), a first guide sleeve (204), a first guide rod (206), a first limit plate (207), a first spring (208), a first roller (209), a first connecting rod (210), a first sleeve (211), a second connecting rod (212), a second guide rod (213), and a second guide sleeve (214); The main shaft (102) is coaxially connected with the first circular ring (201); the first circular ring (201) is provided with the first circular groove (202) in an annular shape; the first circular groove (202) is provided with the second circular ring (203) rotating along the first circular groove; the outer circular ring (203) is fixedly connected with the first guide sleeve (204); the first guide sleeve (204) is provided with the first guide rod (206) moving along the first circular ring; one end of the first guide rod (206) is coaxially fixed with the first limiting plate (207); the first limiting plate (207) is fixedly connected with one end of the first spring (208); the other end of the first spring (208) is fixedly connected with the upper surface of the first guide sleeve (204); the other end of the first limiting plate (207) is provided with the first roller (209) via a bearing; the first roller (209) can overlap with the upper surface of the assembly base (101); The first limiting plate (207) is fixedly connected to the middle part of the first connecting rod (210); one end of the first connecting rod (210) is installed with the first sleeve (211) through a bearing; a structure consisting of the first guide sleeve (204), the first guide hole (205), the first guide rod (206), the first limiting plate (207), the first spring (208), the first roller (209), the first connecting rod (210) and the first sleeve (211) is symmetrically distributed in two groups about the center of the main shaft (102); the first sleeve (211) of the first group is fixedly connected to one end of the second connecting rod (212); the other end of the second connecting rod (212) is coaxially fixed to one end of the second guide rod (213); the second guide rod (213) is arranged in the second guide sleeve (214) and moves along it; one end of the second guide sleeve (214) is fixedly connected to the first sleeve (211) of the second group.

2. The spindle assembly detection device for a CNC machine tool according to claim 1, characterized in that: The second guide rod (213) may be marked with scale.

3. The spindle assembly detection device for a CNC machine tool according to claim 2, characterized in that: The cross-sectional shape of the first guide rod (206) can be a square, and the cross-sectional shape of the first guide hole (205) is a square that matches the cross-sectional shape of the first guide rod (206).

4. The spindle assembly detection device for a CNC machine tool according to claim 3, characterized in that: During the detection process, the first spring (208) is always in a stretched state.

5. The spindle assembly detection device for a CNC machine tool according to claim 4, characterized in that: The structure consisting of the second connecting rod (212), the second guide rod (213) and the second guide sleeve (214) is symmetrically distributed in two groups about the center of the first guide rod (206).

6. The spindle assembly detection device for a CNC machine tool according to claim 5, characterized in that: The assembly base (101) is fixedly connected to the numerically controlled machine tool, the main shaft (102) is fixedly installed on the assembly base (101), the main shaft (102) is detachably fixedly installed on one end of a plurality of transverse axes, and the other ends of the plurality of transverse axes are fixedly connected to the first circular ring (201).

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