Spindle parallelism adjustment device, method and CNC machine tool

Abstract

The invention discloses a spindle parallelism adjustment device, method and CNC machine tool, wherein the CNC machine tool comprises a spindle and a spindle box, the spindle parallelism adjustment device comprises a fixing member and a plurality of adjusting members, the front end of the spindle is fixed to the spindle box by the fixing member; the adjusting member is arranged at the rear end of the spindle, and the adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box. The invention facilitates the adjustment of the spindle parallelism, improves the parallelism between the spindle and the Z axis, and makes the processing accuracy of the CNC machine tool higher.

Description

Technical Field

[0001] The invention relates to the field of numerically controlled machine tools, and in particular to a spindle parallelism adjustment device, method and numerically controlled machine tool. Background Art

[0002] CNC machine tools are equipment that uses computer control systems to automate machine tool processing. It controls the machine tool to perform processing operations such as cutting, drilling, milling, etc. through pre-set programs and instructions, thereby achieving high-precision and high-efficiency processing processes. CNC machine tools are widely used in the manufacturing industry and can process various metal and non-metal materials, such as steel, aluminum alloys, plastics, etc., with the advantages of strong flexibility, high processing accuracy, and high production efficiency.

[0003] The development trends of CNC machine tools include:

[0004] Intelligence: With the development of technologies such as artificial intelligence, big data, and cloud computing, CNC machine tools will become more and more intelligent, able to realize functions such as automated production and automatic fault diagnosis.

[0005] Improvement of precision and speed: With the continuous development of CNC technology, the processing precision and speed of CNC machine tools will continue to improve, and can meet higher processing requirements.

[0006] Multifunctionality: Future CNC machine tools will have more processing functions, be able to switch between multiple processing methods, and improve production efficiency.

[0007] Green and environmental protection: With the enhancement of environmental awareness, CNC machine tools will pay more and more attention to energy conservation and emission reduction, and adopt more environmentally friendly processing methods and materials.

[0008] Personalized customization: With the diversification of market demand, CNC machine tools will develop more and more in the direction of personalized customization, and can meet the processing needs of different industries and different products.

[0009] Networking: CNC machine tools will be combined with the Internet, the Internet of Things and other technologies to realize functions such as remote monitoring and remote maintenance, and improve production efficiency and management level.

[0010] Theoretically, the spindle and Z-axis of a CNC machine tool cannot be completely parallel due to the processing and assembly errors of the parts, and it is necessary to ensure that their parallelism is controlled within a certain error range. It is difficult to achieve this completely through processing, and it requires a lot of manpower and financial resources. Most of the current solutions are to scrape the mounting interface between the spindle box and the spindle end face, which is time-consuming and labor-intensive. Summary of the invention

[0011] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the adjustment of the spindle parallelism of CNC machine tools is time-consuming and labor-intensive, the parallelism between the spindle and the Z-axis is poor, and the machining accuracy of the machine tools is affected. A spindle parallelism adjustment device, method and CNC machine tool are provided, which are convenient for adjusting the parallelism of the spindle, improve the parallelism between the spindle and the Z-axis, and make the machining accuracy of CNC machine tools higher.

[0012] The present invention solves the above technical problems through the following technical solutions:

[0013] A spindle parallelism adjustment device is used for a CNC machine tool, wherein the CNC machine tool comprises a spindle and a spindle box, and the spindle parallelism adjustment device comprises a fixing part and a plurality of adjustment parts.

[0014] The front end of the spindle is fixed to the spindle box through a fixing member;

[0015] The adjusting member is arranged at the rear end of the spindle, and is used to adjust the gap size between the rear end of the spindle and the spindle box.

[0016] Preferably, the spindle parallelism adjustment device further comprises a measuring device, wherein the measuring device is used to measure the parallelism between the spindle axis and the Z axis when the spindle moves along the Z axis;

[0017] The adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box according to the parallelism.

[0018] Preferably, the measuring device comprises a spindle mandrel and a micrometer.

[0019] The spindle mandrel is used to be installed on the spindle;

[0020] The CNC machine tool is used to drive the spindle to move along the Z axis;

[0021] The micrometer is used to measure the deformation value of the spindle mandrel when the spindle moves along the Z axis;

[0022] The adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box according to the deformation value.

[0023] Preferably, the measuring device comprises a spindle mandrel and a laser radar, and the spindle parallelism adjustment device comprises a processing module.

[0024] The spindle mandrel is used to be installed on the spindle;

[0025] The CNC machine tool is used to drive the spindle to move along the Z axis;

[0026] The laser radar is used to collect the three-dimensional image of the spindle mandrel;

[0027] The processing module is used to obtain the parallelism between the main axis and the Z axis according to the three-dimensional image.

[0028] Preferably, the three-dimensional image includes a near-point three-dimensional image and a far-point three-dimensional image.

[0029] The processing module is used to identify the endpoint coordinates of the main shaft mandrel of the near point three-dimensional image and the far point three-dimensional image, obtain the Z-axis vector according to the two endpoint coordinates, obtain the axis vector of the main shaft mandrel according to the near point three-dimensional image, and obtain the parallelism according to the Z-axis vector and the axis vector.

[0030] Preferably, the processing module is used to intercept the near-point three-dimensional image using the vertical plane of the Z-axis vector to obtain a three-dimensional screenshot, find the edge pixel points of the main shaft mandrel on the three-dimensional screenshot, and obtain the axis vector of the main shaft mandrel using the connection line of the edge pixel points on the two three-dimensional screenshots;

[0031] The processing module is also used to obtain the angle and spatial intersection between the Z-axis vector and the axis vector, calculate the position of the spatial intersection on the spindle core rod, and calculate the adjustment amount of the adjustment member using the spatial intersection, the angle and the position of the adjustment member.

[0032] Preferably, the adjustment member includes a plurality of top screws which are evenly arranged at the same position of the spindle axis. The spindle box is provided with mounting holes, and each top screw is supported against the rear end of the spindle through a mounting hole to perform a slight offset adjustment of the gap size.

[0033] Preferably, the spindle parallelism adjustment device is used to initially fix the spindle using a top screw, then obtain and calculate the angle between the Z-axis vector and the axis vector, and use the angle and the top screw position to calculate the component of the deflection angle as the adjustment amount of each top screw.

[0034] The present invention also provides a spindle parallelism adjustment method for a numerically controlled machine tool, wherein the spindle parallelism adjustment method utilizes the spindle parallelism adjustment device as described above to adjust the parallelism between the spindle axis and the Z axis.

[0035] The present invention also provides a numerically controlled machine tool, which is characterized in that the numerically controlled machine tool comprises the spindle parallelism adjustment device as described above.

[0036] Based on the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred embodiments of the present invention.

[0037] The positive and progressive effects of the present invention are:

[0038] The present invention facilitates the adjustment of the parallelism of the main shaft, improves the parallelism between the main shaft and the Z axis, and makes the processing accuracy of the numerical control machine tool higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of the CNC machine tool according to Example 1 of the present invention.

[0040] Figure 2 Another structural schematic diagram of the CNC machine tool according to embodiment 1 of the present invention.

[0041] Figure 3 This is a flow chart of the spindle parallelism adjustment method according to Embodiment 1 of the present invention.

[0042] Figure 4 This is a flow chart of the spindle parallelism adjustment method according to Embodiment 2 of the present invention.

[0043] Figure numerals: 11, main shaft; 12, main shaft box; 13, top screw. DETAILED DESCRIPTION

[0044] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. Example

[0045] See also Figure 1 , Figure 2 , this embodiment provides a CNC machine tool, which includes a spindle parallelism adjustment device.

[0046] The CNC machine tool further comprises a spindle 11 and a spindle box 12, and the spindle parallelism adjustment device comprises a fixing part and a plurality of adjustment parts.

[0047] The front end of the spindle 11 is fixed to the spindle box 12 through a fixing member;

[0048] The adjusting member is arranged at the rear end of the spindle, and is used to adjust the gap size between the rear end of the spindle and the spindle box.

[0049] In the prior art, the method to solve the parallelism between the spindle axis and the Z axis is to scrape the mounting interface between the spindle box and the spindle end face. This method is likely to cause additional wear and tear on the equipment and the spindle box, and is difficult, time-consuming and labor-intensive.

[0050] The present application adopts the method of fixing the spindle to the front section of the spindle box and adjusting the spatial position of the rear end of the spindle so that the spindle axis remains parallel to the Z axis when the spindle box drives the spindle to move.

[0051] The spindle parallelism adjustment device further comprises a measuring device, which is used to measure the parallelism between the spindle axis and the Z axis when the spindle moves along the Z axis;

[0052] The adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box according to the parallelism.

[0053] The measuring device includes a spindle mandrel and a micrometer.

[0054] The spindle mandrel is used to be installed on the spindle;

[0055] The CNC machine tool is used to drive the spindle to move along the Z axis;

[0056] The micrometer is used to measure the deformation value of the spindle mandrel when the spindle moves along the Z axis;

[0057] The adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box according to the deformation value.

[0058] The adjustment member includes a plurality of top screws 13, which are evenly arranged at the same position of the spindle axis. The spindle box is provided with mounting holes, and each top screw 13 is supported against the rear end of the spindle through a mounting hole to perform a slight offset adjustment of the gap size.

[0059] See also Figure 3 , using the above CNC machine tool, this embodiment also provides a spindle parallelism adjustment method, comprising:

[0060] Step 100, the measuring device measures the parallelism between the spindle axis and the Z axis when the spindle moves along the Z axis;

[0061] Step 101: The adjusting member adjusts the gap size between the rear end of the spindle and the spindle box according to the parallelism.

[0062] Specifically, step 100 includes:

[0063] Step 1001, the spindle mandrel is installed on the spindle;

[0064] Step 1002, the CNC machine tool drives the spindle to move along the Z axis;

[0065] Step 1003: The micrometer measures the deformation value of the spindle mandrel when the spindle moves along the Z axis.

[0066] The deformation value is used to represent the parallelism.

[0067] Step 101 specifically includes:

[0068] The adjusting member adjusts the gap size between the rear end of the spindle and the spindle box according to the deformation value. Example

[0069] This embodiment is basically the same as Embodiment 1, except that:

[0070] The measuring device includes a spindle mandrel and a laser radar, and the spindle parallelism adjustment device includes a processing module.

[0071] The spindle mandrel is used to be installed on the spindle;

[0072] The CNC machine tool is used to drive the spindle to move along the Z axis;

[0073] The laser radar is used to collect the three-dimensional image of the spindle mandrel;

[0074] The processing module is used to obtain the parallelism between the main axis and the Z axis according to the three-dimensional image.

[0075] The three-dimensional image includes a near-point three-dimensional image and a far-point three-dimensional image. The near-point three-dimensional image and the far-point three-dimensional image are two sampling points respectively. The image collected when the main axis is close to the laser radar is the near-point three-dimensional image, and the image collected when the main axis is far away from the laser radar is the far-point three-dimensional image.

[0076] The processing module is used to identify the endpoint coordinates of the main shaft mandrel of the near point three-dimensional image and the far point three-dimensional image, obtain the Z-axis vector according to the two endpoint coordinates, obtain the axis vector of the main shaft mandrel according to the near point three-dimensional image, and obtain the parallelism according to the Z-axis vector and the axis vector.

[0077] The axis vector can be obtained by obtaining the direction vector of the axis according to the model of the outer surface cylinder of the main shaft mandrel.

[0078] The processing module is used to intercept the near-point three-dimensional image using the vertical plane of the Z-axis vector to obtain a three-dimensional screenshot, find the edge pixel points of the main shaft mandrel on the three-dimensional screenshot, and obtain the axis vector of the main shaft mandrel using the connection line of the edge pixel points on the two three-dimensional screenshots;

[0079] The processing module is also used to obtain the angle and spatial intersection between the Z-axis vector and the axis vector, calculate the position of the spatial intersection on the spindle core rod, and calculate the adjustment amount of the adjustment member using the spatial intersection, the angle and the position of the adjustment member.

[0080] The adjustment member includes a plurality of top screws which are evenly arranged at the same position of the main shaft axis. The main shaft box is provided with mounting holes. Each top screw supports the rear end of the main shaft through a mounting hole to perform a slight offset adjustment of the gap size.

[0081] The spindle parallelism adjustment device is used to initially fix the spindle using a top screw, then obtain and calculate the angle between the Z-axis vector and the axis vector, and use the angle and the top screw position to calculate the component of the deflection angle as the adjustment amount of each top screw.

[0082] See also Figure 4 , using the above CNC machine tool, this embodiment also provides a spindle parallelism adjustment method, comprising:

[0083] Step 200, the spindle mandrel is installed on the spindle;

[0084] Step 201, the CNC machine tool drives the spindle to move along the Z axis;

[0085] Step 202, the laser radar collects a three-dimensional image of the main shaft core rod;

[0086] Step 203: The processing module obtains the parallelism between the main axis and the Z axis according to the three-dimensional image.

[0087] The three-dimensional image includes a near-point three-dimensional image and a far-point three-dimensional image.

[0088] Step 203 includes:

[0089] Step 2031, the processing module identifies the coordinates of the end points of the acquisition spindle mandrel of the near-point 3D image and the far-point 3D image;

[0090] Step 2032, obtaining the Z-axis vector according to the coordinates of the two endpoints;

[0091] Step 2033, obtaining the axis vector of the main shaft mandrel according to the near point three-dimensional image;

[0092] Step 2034: Acquire the parallelism according to the Z-axis vector and the axis vector.

[0093] Step 2033 specifically includes:

[0094] The processing module uses a vertical plane of the Z-axis vector to intercept the near-point three-dimensional image to obtain a three-dimensional screenshot, searches for edge pixel points of the spindle mandrel on the three-dimensional screenshot, and uses a line connecting the edge pixel points on two three-dimensional screenshots to obtain the axis vector of the spindle mandrel;

[0095] Step 204, the processing module obtains the angle and spatial intersection between the Z-axis vector and the axis vector, calculates the position of the spatial intersection on the spindle core rod, and calculates the adjustment amount of the adjustment member using the spatial intersection, the angle and the position of the adjustment member.

[0096] Step 204 specifically includes:

[0097] The spindle parallelism adjustment device uses a top screw to initially fix the spindle;

[0098] Then obtain and calculate the angle between the Z-axis vector and the axis vector;

[0099] The component of the deflection angle is calculated using the angle and the position of the top screw as the adjustment amount of each top screw.

[0100] This embodiment facilitates the adjustment of the parallelism of the main shaft, improves the parallelism between the main shaft and the Z axis, and makes the processing accuracy of the CNC machine tool higher.

[0101] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A spindle parallelism adjustment device for a CNC machine tool, characterized in that: The CNC machine tool comprises a spindle and a spindle box, and the spindle parallelism adjustment device comprises a fixing part and a plurality of adjustment parts. The front end of the spindle is fixed to the spindle box through a fixing member; The adjusting member is arranged at the rear end of the spindle, and is used to adjust the gap size between the rear end of the spindle and the spindle box; The adjusting member comprises a plurality of top screws, which are evenly arranged at the same position of the main shaft axis. The main shaft box is provided with mounting holes, and each top screw is supported against the rear end of the main shaft through a mounting hole to perform a slight offset adjustment of the gap size. The spindle parallelism adjustment device is used to initially fix the spindle using a top screw, then obtain and calculate the angle between the Z-axis vector and the axis vector, and use the angle and the top screw position to calculate the component of the deflection angle as the adjustment amount of each top screw; The spindle parallelism adjustment device further comprises a measuring device, which is used to measure the parallelism between the spindle axis and the Z axis when the spindle moves along the Z axis; The adjusting member is used to adjust the gap size between the rear end of the spindle and the spindle box according to the parallelism; The measuring device includes a spindle mandrel and a laser radar, and the spindle parallelism adjustment device includes a processing module. The spindle mandrel is used to be installed on the spindle; The CNC machine tool is used to drive the spindle to move along the Z axis; The laser radar is used to collect the three-dimensional image of the spindle mandrel; The processing module is used to obtain the parallelism between the main axis and the Z axis according to the three-dimensional image; The three-dimensional image includes a near-point three-dimensional image and a far-point three-dimensional image. The processing module is used to identify the acquisition spindle mandrel endpoint coordinates of the near point 3D image and the far point 3D image, obtain the Z axis vector according to the two endpoint coordinates, obtain the axis vector of the spindle mandrel according to the near point 3D image, and obtain the parallelism according to the Z axis vector and the axis vector; The processing module is used to intercept the near-point three-dimensional image using the vertical plane of the Z-axis vector to obtain a three-dimensional screenshot, find the edge pixel points of the main shaft mandrel on the three-dimensional screenshot, and obtain the axis vector of the main shaft mandrel using the connection line of the edge pixel points on the two three-dimensional screenshots; The processing module is also used to obtain the angle and spatial intersection between the Z-axis vector and the axis vector, calculate the position of the spatial intersection on the spindle core rod, and calculate the adjustment amount of the adjustment member using the spatial intersection, the angle and the position of the adjustment member.

2. A spindle parallelism adjustment method for a CNC machine tool, characterized in that: The spindle parallelism adjustment method uses the spindle parallelism adjustment device as claimed in claim 1 to adjust the parallelism between the spindle axis and the Z axis.

3. A CNC machine tool, characterized in that: The CNC machine tool comprises the spindle parallelism adjustment device as claimed in claim 1.

Images