Taper correction method and machine tool

Abstract

The invention discloses a taper correction method and a machine tool. The taper correction method comprises the steps that a first taper needing to be corrected is obtained, and a current set parameter of the first taper in a machine tool is initialized into an initialized set parameter; in the first direction, a rectangular workpiece is cut into a first groove through the first taper; measuring a first distance from the midpoint of the lower bottom of the trapezoid to the left waist of the trapezoid along the first direction, measuring a second distance from the midpoint of the lower bottom of the trapezoid to the right waist of the trapezoid along the first direction, measuring a third distance from the first measuring point to the second measuring point along the first direction, and measuring a fourth distance from the third measuring point to the fourth measuring point along the first direction; correcting an initialization setting parameter of the first taper in the first direction into a first setting parameter according to the first distance, the second distance, the third distance and the fourth distance; the first set parameters are set parameters when the machine tool conducts cutting in the first direction. The correction precision of the machine tool taper is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool cutting technology, and in particular to a taper correction method and a machine tool. Background Technology

[0002] For high-precision wire EDM machines, the taper of the cutting line needs to maintain a specific tilt angle in order to achieve the cutting and processing of the workpiece. Therefore, the accuracy of the taper is crucial to the machining accuracy of the machine tool.

[0003] However, existing technologies generally use methods such as spark correction and fixture correction for correction, but the results of these corrections have low accuracy and cannot guarantee the machining accuracy of high-precision taper machining on machine tools. Summary of the Invention

[0004] This invention provides a taper correction method and machine tool to solve the problem of low taper correction accuracy in machine tools.

[0005] According to one aspect of the present invention, a taper correction method is provided, comprising:

[0006] Obtain the first taper that needs to be corrected, and initialize the current setting parameters of the first taper in the machine tool to the initial setting parameters;

[0007] In a first direction, a first groove is cut into a rectangular workpiece by a first taper. The first groove penetrates the upper and lower surfaces of the rectangular workpiece, and the projection of the first groove along a second direction is trapezoidal; the second direction is perpendicular to the first direction.

[0008] Measure a first distance from the midpoint of the lower base of the trapezoid to the left side of the trapezoid along the first direction; measure a second distance from the midpoint of the lower base of the trapezoid to the right side of the trapezoid along the first direction; measure a third distance between the first and second measuring points along the first direction; measure a fourth distance between the third and fourth measuring points along the first direction; the second direction is perpendicular to the first direction.

[0009] The first and second measuring points are located on the left side of the trapezoid. The first measuring point is lower than the intersection of the upper base and the left side of the trapezoid, and the second measuring point is higher than the intersection of the lower base and the left side of the trapezoid. The length between the first and second measuring points is less than the length of the left side. The third and fourth measuring points are located on the right side of the trapezoid. The third measuring point is lower than the intersection of the upper base and the left side of the trapezoid, and the fourth measuring point is higher than the intersection of the lower base and the left side of the trapezoid. The length between the third and fourth measuring points is less than the length of the right side.

[0010] Based on the first distance, the second distance, the third distance, and the fourth distance, the initial setting parameter of the first taper in the first direction is corrected to the first setting parameter; the first setting parameter is the setting parameter when the machine tool performs cutting in the first direction.

[0011] Optionally, measuring the first distance from the midpoint of the lower base of the trapezoid to the left leg of the trapezoid along the first direction, measuring the second distance from the midpoint of the lower base of the trapezoid to the right leg of the trapezoid along the first direction, measuring the third distance between the first and second measuring points along the first direction, and measuring the fourth distance between the third and fourth measuring points along the first direction include:

[0012] The machine tool moves the cutting line from the initial position to the intersection of the left side and the lower base of the trapezoid, and measures the first distance based on the moving distance; the initial position is the midpoint of the lower base of the trapezoid;

[0013] The machine tool moves the cutting line from the initial position to the intersection of the right side and the lower base of the trapezoid, and measures the second distance based on the moving distance;

[0014] The third and fourth distances were measured using a dial indicator.

[0015] Optionally, the first distance is the moving distance of the cutting line minus the radius of the cutting line;

[0016] The second distance is the moving distance of the cutting line minus the radius of the cutting line.

[0017] Optionally, the third measuring point is horizontally positioned with the first measuring point in the first direction, and the fourth measuring point is horizontally positioned with the second measuring point in the first direction.

[0018] Optionally, the angle between the left leg and the lower base of the trapezoid is an obtuse angle, and the angle between the right leg and the lower base of the trapezoid is an obtuse angle.

[0019] Optionally, after measuring the first distance from the midpoint of the lower base of the trapezoid to the left leg of the trapezoid along the first direction, the second distance from the midpoint of the lower base of the trapezoid to the right leg of the trapezoid along the first direction, the third distance between the first and second measuring points along the first direction, and the fourth distance between the third and fourth measuring points along the first direction, the method further includes:

[0020] In the second direction, a second groove is cut into the rectangular workpiece by a first taper. The second groove penetrates the upper and lower surfaces of the rectangular workpiece, and the projection of the second groove along the first direction is trapezoidal.

[0021] Measure the fifth distance from the midpoint of the lower base of the trapezoid to the left side of the trapezoid along the second direction; measure the sixth distance from the midpoint of the lower base of the trapezoid to the right side of the trapezoid along the second direction; measure the seventh distance between the fifth and sixth measurement points along the second direction; measure the eighth distance between the seventh and eighth measurement points along the second direction.

[0022] The fifth measuring point is lower than the intersection of the upper base and the left side of the trapezoid, the sixth measuring point is higher than the intersection of the lower base and the left side of the trapezoid, the length between the fifth and sixth measuring points is less than the length of the left side, the seventh and eighth measuring points are located on the right side of the trapezoid, the seventh measuring point and the fifth measuring point are horizontally positioned in the second direction, and the eighth measuring point and the sixth measuring point are horizontally positioned in the second direction.

[0023] Optionally, after correcting the initial setting parameter of the first taper in the first direction to the first setting parameter based on the first distance, the second distance, the third distance, and the fourth distance, the method further includes:

[0024] The initial setting parameter of the first taper in the second direction is corrected to the second setting parameter based on the fifth distance, the sixth distance, the seventh distance and the eighth distance;

[0025] The second setting parameter is the setting parameter when the machine tool performs cutting in the second direction.

[0026] Optionally, after correcting the initial setting parameter of the first taper in the second direction to the second setting parameter based on the fifth distance, the sixth distance, the seventh distance, and the eighth distance, the method further includes:

[0027] Update the initialization settings of the machine tool to the first settings and the second settings;

[0028] Replace the cut rectangular workpiece with a new rectangular workpiece and repeat the taper correction method.

[0029] When the difference between the first distance, the second distance, the third distance, and the fourth distance measured in two consecutive measurements are all less than the first threshold, the correction of the first taper in the first direction is completed.

[0030] When the difference between the fifth distance, the sixth distance, the seventh distance, and the eighth distance measured consecutively are all less than the second threshold, the correction of the first taper in the second direction is completed.

[0031] Optionally, before obtaining the first taper that needs to be corrected and initializing the current setting parameter of the first taper in the machine tool to the initial setting parameter, the following steps are included:

[0032] A third groove is cut into a rectangular workpiece. The third groove is located on the leftmost side of the rectangular workpiece and penetrates the upper and lower surfaces of the rectangular workpiece. The cutting surfaces of the third groove are perpendicular to those in the first and second directions.

[0033] The perpendicularity of the cut surface of the third groove is detected, and the machine tool is corrected for perpendicularity.

[0034] According to another aspect of the present invention, a machine tool is provided that applies the taper correction method described in any embodiment of the present invention.

[0035] The technical solution provided by this invention verifies the first taper by controlling a machine tool to cut a first groove into a rectangular workpiece using a first taper, and obtains the first, second, third, and fourth distances of the first groove in a first direction. This allows for the correction of the initial setting parameters to the first set parameters, resulting in a good correction effect. By detecting multiple distances, this invention effectively reflects the cutting accuracy of the first taper without considering the machine tool's hardware environment, such as fixture wear, thus significantly improving correction accuracy.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of a taper correction method provided according to an embodiment of the present invention;

[0039] Figure 2 This is a cutting diagram of a rectangular workpiece provided according to an embodiment of the present invention;

[0040] Figure 3 This is a flowchart of another taper correction method provided according to an embodiment of the present invention;

[0041] Figure 4 This is a cross-sectional view of a rectangular workpiece provided according to an embodiment of the present invention;

[0042] Figure 5 This is a flowchart of another taper correction method provided according to an embodiment of the present invention;

[0043] Figure 6 This invention provides another cutting pattern for a rectangular workpiece according to an embodiment of the present invention;

[0044] Figure 7 This is a cross-sectional view of another rectangular workpiece provided according to an embodiment of the present invention;

[0045] Figure 8 This is a flowchart of another taper correction method provided according to an embodiment of the present invention;

[0046] Figure 9 This is another cutting diagram of a rectangular workpiece provided according to an embodiment of the present invention. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] This invention provides a taper correction method. Figure 1 This is a flowchart illustrating a taper correction method provided in an embodiment of the present invention. (See reference...) Figure 1 Taper correction methods include:

[0050] S110. Obtain the first taper that needs to be corrected, and initialize the current setting parameter of the first taper in the machine tool to the initialization setting parameter.

[0051] When the machine tool has a large error when cutting through the first taper, or after the machine tool replaces the new guide nozzle or reinstalls the head, a taper correction step must be performed. When the first taper needs to be used for cutting, the first taper needs to be corrected first. At this time, the current setting parameters can be initialized to the initial setting parameters.

[0052] The current setting parameters are those used when the machine tool was previously cutting. When taper correction is performed, it indicates that these setting parameters are no longer accurate and need to be initialized. Cutting is then performed using the initialized setting parameters, which determine the accuracy of cutting through the first taper. For example, the first taper can be 3 degrees.

[0053] S120. In the first direction, a first groove is cut into a rectangular workpiece by a first taper. The first groove penetrates the upper and lower surfaces of the rectangular workpiece, and the projection of the first groove along the second direction is trapezoidal.

[0054] Figure 2 This is a cutting diagram of a rectangular workpiece provided in an embodiment of the present invention. (Reference) Figure 2 The first direction is x, the second direction is y, and the third direction is z. The second direction y is perpendicular to the first direction x. The machine tool cuts a rectangular workpiece along the first direction x by initializing the parameters and cuts out a first groove 1. The projection of the first groove 1 along the second direction y is trapezoidal. By detecting the cutting accuracy of the first groove 1, the accuracy of cutting in the first direction x through the first taper can be verified.

[0055] S130. Measure the first distance from the midpoint of the lower base of the trapezoid to the left side of the trapezoid along the first direction; measure the second distance from the midpoint of the lower base of the trapezoid to the right side of the trapezoid along the first direction; measure the third distance between the first and second measuring points along the first direction; and measure the fourth distance between the third and fourth measuring points along the first direction.

[0056] The first and second measuring points are located on the left side of the trapezoid. The first measuring point is lower than the intersection of the upper base and the left side of the trapezoid, and the second measuring point is higher than the intersection of the lower base and the left side of the trapezoid. The length between the first and second measuring points is less than the length of the left side. The third and fourth measuring points are located on the right side of the trapezoid. The third measuring point is lower than the intersection of the upper base and the left side of the trapezoid, and the fourth measuring point is higher than the intersection of the lower base and the left side of the trapezoid. The length between the third and fourth measuring points is less than the length of the right side.

[0057] When machining the first groove 1 through the first taper, the accuracy of the uppermost and lowermost ends of the first groove 1 is generally lower than that of the middle. Therefore, by avoiding the uppermost and lowermost ends of the left waist of the trapezoid by the first and second measuring points, and avoiding the uppermost and lowermost ends of the right waist of the trapezoid by the third and fourth measuring points, the sampling accuracy of the third and fourth distances can be improved, thereby improving the detection accuracy of the first groove 1.

[0058] S140. Based on the first distance, the second distance, the third distance, and the fourth distance, the initial setting parameter of the first taper in the first direction is corrected to the first setting parameter; the first setting parameter is the setting parameter when the machine tool performs cutting in the first direction.

[0059] The first groove 1 is obtained by the machine tool through initialization setting parameters. These initialization setting parameters may not necessarily enable the machine tool to achieve precise taper cutting. By verifying the first distance, second distance, third distance, and fourth distance in the second direction, the cutting accuracy of the machine tool's first taper when cutting in the first direction x can be verified. The first taper is corrected by the first distance, second distance, third distance, and fourth distance, and a first setting parameter is generated. When the machine tool cuts through the first taper again, it can cut using the corrected first setting parameter. At this time, the machine tool has higher cutting accuracy under the first taper.

[0060] The technical solution provided by this invention verifies the first taper by controlling a machine tool to cut a first groove into a rectangular workpiece using a first taper, and obtains the first, second, third, and fourth distances of the first groove in a first direction. This allows for the correction of the initial setting parameters to the first set parameters, resulting in a good correction effect. By detecting multiple distances, this invention effectively reflects the cutting accuracy of the first taper without considering the machine tool's hardware environment, such as fixture wear, thus significantly improving correction accuracy.

[0061] Figure 3 A flowchart illustrating another taper correction method provided in an embodiment of the present invention. (See reference...) Figure 3 Based on the above embodiments, optionally, S130, measuring a first distance from the midpoint of the lower base of the trapezoid to the left leg of the trapezoid along the first direction, measuring a second distance from the midpoint of the lower base of the trapezoid to the right leg of the trapezoid along the first direction, measuring a third distance between the first and second measuring points along the first direction, and measuring a fourth distance between the third and fourth measuring points along the first direction includes:

[0062] S131. The machine tool moves the cutting line from the initial position to the intersection of the left side and the lower base of the trapezoid, and measures the first distance based on the moving distance; the initial position is the midpoint of the lower base of the trapezoid.

[0063] Figure 4 This is a cross-sectional view of a rectangular workpiece provided in an embodiment of the present invention. (Reference) Figure 4 The first measurement point is B, the second measurement point is C, the third measurement point is D, and the fourth measurement point is E. The initial position A is the starting cutting position when the machine tool performs cutting, which is located at the midpoint of the lower base of the trapezoid. The machine head cuts the first groove through the cutting line. However, the movement distance of the machine head can be directly detected by the machine tool. Therefore, by controlling the machine head to move the cutting line to the left from the initial position A, when the cutting line touches the bottom of the left side of the trapezoid, the first distance R can be measured.

[0064] S132. The machine tool moves the cutting line from the initial position to the intersection of the right side and the lower base of the trapezoid, and measures the second distance based on the moving distance.

[0065] By controlling the machine head to return to the initial position A, and controlling the machine head to move the cutting line to the right from the initial position A, the second distance P can be measured when the cutting line touches the bottom of the right side of the trapezoid.

[0066] S133. Measure the third and fourth distances using a dial indicator.

[0067] Optionally, the third measurement point D and the first measurement point B are set horizontally in the first direction x, and the fourth measurement point E and the second measurement point C are set horizontally in the first direction x.

[0068] The third measuring point D and the first measuring point B can be a certain distance below the top of the rectangular workpiece, and the fourth measuring point E and the second measuring point C can be a certain distance above the bottom of the rectangular workpiece. By removing areas that may have processing errors, selecting the middle measuring points and measuring with a high-precision dial indicator, it will be ensured that the third distance S and the fourth distance Q can better reflect the true level of the machine tool cutting at the first taper.

[0069] Continue to refer to Figure 4 Based on the above embodiments, optionally, the first distance is the moving distance of the cutting line minus the radius of the cutting line; the second distance is the moving distance of the cutting line minus the radius of the cutting line.

[0070] When the machine head moves the cutting line to the left from the initial position A, the complete movement distance when the cutting line touches the bottom of the left side of the trapezoid includes the radius of the cutting line. Therefore, the first distance R can be measured by subtracting the radius of the cutting line from the movement distance. Similarly, when the machine head moves the cutting line to the right from the initial position A, the complete movement distance when the cutting line touches the bottom of the right side of the trapezoid includes the radius of the cutting line. Therefore, the second distance P can be measured by subtracting the radius of the cutting line from the movement distance.

[0071] Table 1

[0072]

[0073] Table 1 is a machine tool input data table provided in an embodiment of the present invention. Referring to Table 1, the machine tool's program surface PP, auxiliary surface SP, third-direction position ZP, parameter value E, and parameter value F can all be automatically generated by the machine tool. Only the correction direction, plate thickness H, dial indicator measurement length J, first distance R, second distance P, third distance S, fourth distance Q, instruction precision value O, and instruction target value B need to be filled in. Among them, plate thickness H is the thickness of the rectangular workpiece along the third direction, dial indicator measurement length J is the length along the third direction from the first measurement point B and the second measurement point C, the correction direction includes the first direction or the second direction, the instruction precision value O is the taper value to be corrected, and the instruction target value B is the value of the taper value to be corrected minus the cutting line radius.

[0074] After calculating the first distance R, the second distance P, the third distance S, and the fourth distance Q, the values ​​can be input into the machine tool. By setting the calculation program in the machine tool, the correction value, which is the first set parameter, can be calculated from each value.

[0075] Based on the above embodiments, optionally, the angle between the left leg and the lower base of the trapezoid is an obtuse angle, and the angle between the right leg and the lower base of the trapezoid is an obtuse angle.

[0076] Figure 5 A flowchart illustrating another taper correction method provided in an embodiment of the present invention. (See reference...) Figure 5 Based on the above embodiments, optionally, after S130, measuring the first distance from the midpoint of the lower base of the trapezoid to the left leg of the trapezoid along the first direction, measuring the second distance from the midpoint of the lower base of the trapezoid to the right leg of the trapezoid along the first direction, measuring the third distance between the first and second measuring points along the first direction, and measuring the fourth distance between the third and fourth measuring points along the first direction, the method further includes:

[0077] S150, in the second direction, a second groove is cut into the rectangular workpiece by the first taper. The second groove penetrates the upper and lower surfaces of the rectangular workpiece, and the projection of the second groove along the first direction is trapezoidal.

[0078] Figure 6 This is another cutting diagram of a rectangular workpiece provided in an embodiment of the present invention. (Reference) Figure 6 The rectangular workpiece also includes a second groove 2 cut in the second direction y. Exemplarily, the second groove 2 may be the same size as the first groove 1.

[0079] The machine tool cuts a rectangular workpiece along the second direction y and cuts out a second groove 2. The projection of the second groove 2 along the first direction x is trapezoidal. By detecting the cutting accuracy of the second groove 2, the accuracy of cutting in the second direction y through the first taper can be verified.

[0080] S160. Measure the fifth distance from the midpoint of the lower base of the trapezoid to the left side of the trapezoid along the second direction. Measure the sixth distance from the midpoint of the lower base of the trapezoid to the right side of the trapezoid along the second direction. Measure the seventh distance between the fifth and sixth measuring points along the second direction. Measure the eighth distance between the seventh and eighth measuring points along the second direction.

[0081] Figure 7 This is a cross-sectional view of another rectangular workpiece provided in an embodiment of the present invention. (Refer to...) Figure 7 The fifth measuring point F is lower than the intersection of the upper base and the left side of the trapezoid, and the sixth measuring point G is higher than the intersection of the lower base and the left side of the trapezoid. The length between the fifth measuring point F and the sixth measuring point G is less than the length of the left side. The seventh measuring point H and the eighth measuring point I are set on the right side of the trapezoid. The seventh measuring point H and the fifth measuring point F are set horizontally in the second direction, and the eighth measuring point I and the sixth measuring point G are set horizontally in the second direction.

[0082] Continue to refer to Figure 5 Based on the above embodiments, optionally, after S140, when the initial setting parameter of the first taper in the first direction is corrected to the first setting parameter according to the first distance, the second distance, the third distance, and the fourth distance, the method further includes:

[0083] S170. Based on the fifth distance, the sixth distance, the seventh distance, and the eighth distance, the initial setting parameters of the first taper in the second direction are corrected to the second setting parameters; the second setting parameters are the setting parameters when the machine tool performs cutting in the second direction.

[0084] The second groove 2 is obtained by the machine tool through initialization setting parameters. These initialization setting parameters may not necessarily enable the machine tool to achieve precise taper cutting. By verifying the fifth distance U, the sixth distance V, the seventh distance T, and the eighth distance W in the second direction, the cutting accuracy of the machine tool's first taper when cutting in the second direction y can be verified. The first taper is corrected by the fifth distance U, the sixth distance V, the seventh distance T, and the eighth distance W, and a second setting parameter is generated. When the machine tool cuts in the second direction y of the first taper next time, it can cut using the corrected second setting parameter. At this time, the machine tool has higher cutting accuracy under the first taper.

[0085] The technical solution provided by the embodiments of the present invention achieves joint correction of the first and second directions when the machine tool cuts through the first taper by cutting the first groove in the first direction and the second groove in the second direction. In the next cutting process when the machine tool passes through the taper, the cutting can be performed by the corrected first and second setting parameters, which can improve the cutting accuracy to ±2-3 micrometers and has high cutting accuracy.

[0086] Based on the above embodiments, optionally, after correcting the initial setting parameters of the first taper in the second direction to the second setting parameters according to the fifth, sixth, seventh, and eighth distances, the method further includes: updating the initial setting parameters of the machine tool to the first and second setting parameters. The cut rectangular workpiece is replaced with a new rectangular workpiece, and the taper correction method is repeated. When the differences between two consecutive measurements of the first distance, the second distance, the third distance, and the fourth distance are all less than a first threshold, the correction of the first taper in the first direction is completed. When the differences between two consecutive measurements of the fifth distance, the sixth distance, the seventh distance, and the eighth distance are all less than the second threshold, the correction of the first taper in the second direction is completed.

[0087] After obtaining the first and second setting parameters, the machine tool's initialization setting parameters are updated to the first and second setting parameters, and the new rectangular workpiece is recalibrated according to the newly set parameters. Similar to the previous steps, a first groove is cut in the first direction, and a first, second, third, and fourth distance are obtained. A second groove is cut in the second direction, and a fifth, sixth, seventh, and eighth distance are obtained.

[0088] If the differences between the two consecutive measurements are small, it indicates that the correction of the first taper has achieved a good effect. If the differences between the two consecutive measurements are large, it indicates that the correction of the first taper has not achieved a good effect. The taper correction method needs to be executed again, and the first and second setting parameters need to be corrected again until the differences between the two consecutive measurements are limited to a small range. Then the correction of the first taper is completed.

[0089] Figure 8 A flowchart illustrating another taper correction method provided in an embodiment of the present invention. (See reference...) Figure 8 Based on the above embodiments, optionally, before S110, obtaining the first taper that needs to be corrected, and initializing the current setting parameter of the first taper in the machine tool to the initialization setting parameter, the following steps are included:

[0090] S180. A third groove is cut into a rectangular workpiece. The third groove is located on the far left of the rectangular workpiece and penetrates the upper and lower surfaces of the rectangular workpiece. The cutting surfaces of the third groove in the first and second directions are perpendicular to each other.

[0091] S190. Detect the perpendicularity of the cut surface of the third groove and perform perpendicularity correction on the machine tool.

[0092] in, Figure 9 This is another cutting diagram of a rectangular workpiece provided in an embodiment of the present invention. (Reference) Figure 9By correcting the perpendicularity before correcting the first taper, the cutting perpendicularity of the machine tool can be ensured to be accurate, thereby ensuring the perpendicularity of the cutting line.

[0093] When the perpendicularity of the cutting line is good, the machine tool can be in good working condition. When the cutting line touches the bottom of the left or right waist of the trapezoid, more accurate first, second, fifth and sixth distances can also be obtained.

[0094] This invention also provides a machine tool. The taper correction method provided in any embodiment of this invention has similar beneficial effects to the taper correction method, and will not be described in detail here.

[0095] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0096] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method of taper correction, characterized by, The method comprises: acquiring a first taper needing correction, and initializing a current setting parameter of the first taper in a machine tool as an initialization setting parameter; cutting a first groove through upper and lower surfaces of a rectangular workpiece by the first taper in a first direction, the first groove being a trapezoid in projection along a second direction, the second direction being perpendicular to the first direction; measuring a first distance from a lower base midpoint of the trapezoid to a left leg of the trapezoid along the first direction, measuring a second distance from the lower base midpoint of the trapezoid to a right leg of the trapezoid along the first direction, measuring a third distance between a first measuring point and a second measuring point along the first direction, and measuring a fourth distance between a third measuring point and a fourth measuring point along the first direction; wherein the first measuring point and the second measuring point are arranged at the left leg of the trapezoid, the first measuring point is lower than an intersection of an upper base and the left leg of the trapezoid, the second measuring point is higher than an intersection of the lower base and the left leg of the trapezoid, a length between the first measuring point and the second measuring point is less than a length of the left leg, the third measuring point and the fourth measuring point are arranged at the right leg of the trapezoid, the third measuring point is lower than the intersection of the upper base and the left leg of the trapezoid, the fourth measuring point is higher than the intersection of the lower base and the left leg of the trapezoid, a length between the third measuring point and the fourth measuring point is less than a length of the right leg; correcting the initialization setting parameter of the first taper in the first direction as a first setting parameter according to the first distance, the second distance, the third distance and the fourth distance, the first setting parameter being a setting parameter of the machine tool when cutting in the first direction.

2. The taper correction method of claim 1, wherein The measuring of the first distance, the second distance, the third distance and the fourth distance comprises: the machine tool moves a cutting line from an initial position to an intersection of the left leg and the lower base of the trapezoid, and measures the first distance according to a moving distance; the machine tool moves the cutting line from the initial position to an intersection of the right leg and the lower base of the trapezoid, and measures the second distance according to a moving distance; the third distance and the fourth distance are measured by a micrometer.

3. The taper correction method of claim 2, wherein The first distance is the moving distance of the cutting line minus a radius of the cutting line. The second distance is the moving distance of the cutting line minus the radius of the cutting line.

4. The taper correction method of claim 1, wherein The third measuring point is horizontally arranged with the first measuring point in the first direction, and the fourth measuring point is horizontally arranged with the second measuring point in the first direction.

5. The taper correction method of claim 1, wherein An angle between the left leg and the lower base of the trapezoid is obtuse, and an angle between the right leg and the lower base of the trapezoid is obtuse.

6. The taper correction method of claim 1, wherein In the first direction, the first distance is measured from the lower base midpoint of the trapezoid to the left waist of the trapezoid, the second distance is measured from the lower base midpoint of the trapezoid to the right waist of the trapezoid, the third distance is measured from the first measurement point to the second measurement point in the first direction, and the fourth distance is measured from the third measurement point to the fourth measurement point in the first direction, the method further comprises: In the second direction, the second groove is cut by the first taper, the second groove penetrates the upper surface and the lower surface of the rectangular workpiece, and the projection of the second groove in the first direction is a trapezoid; In the second direction, the fifth distance is measured from the lower base midpoint of the trapezoid to the left waist of the trapezoid, the sixth distance is measured from the lower base midpoint of the trapezoid to the right waist of the trapezoid, the seventh distance is measured from the fifth measurement point to the sixth measurement point in the second direction, and the eighth distance is measured from the seventh measurement point to the eighth measurement point in the second direction; Wherein, the fifth measurement point is lower than the intersection of the upper base and the left waist of the trapezoid, the sixth measurement point is higher than the intersection of the lower base and the left waist of the trapezoid, the length between the fifth measurement point and the sixth measurement point is less than the length of the left waist, the seventh measurement point and the eighth measurement point are arranged on the right waist of the trapezoid, the seventh measurement point is horizontally arranged with the fifth measurement point in the second direction, and the eighth measurement point is horizontally arranged with the sixth measurement point in the second direction.

7. The method of taper correction of claim 6, wherein, After the first taper is corrected to the first setting parameter in the first direction according to the first distance, the second distance, the third distance and the fourth distance, the method further comprises: The first taper is corrected to the second setting parameter in the second direction according to the fifth distance, the sixth distance, the seventh distance and the eighth distance; The second setting parameter is the setting parameter of the machine tool when cutting in the second direction.

8. The taper correction method of claim 7, wherein After the first taper is corrected to the second setting parameter in the second direction according to the fifth distance, the sixth distance, the seventh distance and the eighth distance, the method further comprises: The initialization setting parameter of the machine tool is updated to the first setting parameter and the second setting parameter; The cut rectangular workpiece is replaced with a new rectangular workpiece, and the taper correction method is repeatedly executed; When the difference between the first distance measured twice in succession, the difference between the second distance, the difference between the third distance and the difference between the fourth distance are all less than a first threshold value, the correction of the first taper in the first direction is completed; When the difference between the fifth distance measured twice in succession, the difference between the sixth distance, the difference between the seventh distance and the difference between the eighth distance are all less than a second threshold value, the correction of the first taper in the second direction is completed.

9. The method of taper correction of claim 1, wherein, Before the first taper needing correction is obtained, and the current setting parameter of the first taper in the machine tool is initialized to the initialization setting parameter, the method comprises: cutting a third groove in a rectangular workpiece, the third groove being located at the leftmost side of the rectangular workpiece and penetrating through the upper surface and the lower surface of the rectangular workpiece, the cutting surfaces of the third groove being perpendicular in the first direction and the second direction; detecting the perpendicularity of the cutting surfaces of the third groove and correcting the perpendicularity of the machine tool.

10. A machine tool, characterized by application of the taper correction method according to any one of claims 1 to 9.

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