Ear tab end face finishing method

Abstract

The present application belongs to the technical field of machining, and particularly relates to a ear piece end face finishing machining method, comprising: selecting a cross type machine tool workpiece measuring head; calibrating the measuring needle of the cross type machine tool workpiece measuring head; using the calibrated cross type machine tool workpiece measuring head to align the ear piece end face; corresponding to the aligned ear piece end face, planning a ring layer structure trajectory for the ear piece ring material; and based on the planned ring layer structure trajectory, machining the ear piece ring material. The technical scheme can realize accurate alignment of the ear piece end face and optimal layering trajectory planning of the ring layer structure, and ensure the machining precision, stability and machining efficiency of the ear piece end face.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and in particular relates to a method for finishing the end face of an ear piece. Background Technology

[0002] Large aircraft fuselages and wings are connected using high-precision wing-fuselage junction holes with pins. The junction holes of the wing-fuselage mating lugs often employ a cold extrusion method to install interference-fit bushings. This method uses the cold extrusion of a mandrel to plastically expand the bushing, thus creating an interference fit between the bushing and the hole. Installing interference bushings using the cold extrusion method can significantly increase the fatigue life of the wing-fuselage mating lugs. However, this process can cause "crater"-like protrusions on the end faces of the wing-fuselage mating lugs, affecting the wing-fuselage assembly. Therefore, supplementary finishing of the lug end faces is required, typically performed by milling.

[0003] Because the wing-fuselage joint junction holes form a layered structure of difficult-to-machine and easy-to-machine materials after the interference bushings are installed using the cold extrusion method, milling is generally performed using the process methods for difficult-to-machine materials, resulting in low machining efficiency. Due to the large size of aircraft components, it is difficult to align them using features within the large components when machining the wing-fuselage joint lug surfaces. The lug end faces have a layered structure, requiring minimal material removal. Machining must eliminate "volcano-like" protrusions and ensure flushness with the original lug end faces, making machining very difficult. Summary of the Invention

[0004] The purpose of this invention is to address the existing processing problems of lugs by proposing a lug end face finishing method. This method is applicable to the layered side milling of a stacked structure of annular, difficult-to-machine and easy-to-machine materials. This method can achieve accurate alignment of the lug end face and optimal layered trajectory planning for the annular stacked structure, ensuring the processing accuracy, stability and efficiency of the lug end face.

[0005] The technical solution adopted to achieve the above objectives is as follows:

[0006] A method for finishing the end face of an ear piece, characterized by comprising the following steps:

[0007] S1, Select to use the cross-shaped machine tool workpiece probe;

[0008] S2, calibrate the probe of the cross-shaped machine tool workpiece;

[0009] S3, use the calibrated cross-shaped machine tool workpiece probe to align the end face of the ear piece;

[0010] S4, corresponding to the aligned ear end face, perform annular stacked structure trajectory planning for the ear ring material;

[0011] S5, based on the planned annular stacked structure trajectory, processes the ear ring material.

[0012] Preferably, in the step S2, the measuring needle calibration comprises the following steps:

[0013] S21, install the cross machine workpiece measuring head on the spindle of the machine tool, and let the measuring needle coaxial with the spindle of the machine tool be No. I measuring needle, and the other two be No. II measuring needle and No. III measuring needle;

[0014] S22, install the standard diameter size calibration ball on the machine tool, and make the support rod of the calibration ball parallel to the spindle tool axis on the machine tool;

[0015] S23, activate the zero point offset of the machine tool;

[0016] S24, control the cross machine workpiece measuring head to move through the machine tool, measure the position (X1, Y1, Z1) of the standard ball in the machine tool coordinate axis by using No. I measuring needle, and update the position data to the activated zero point offset;

[0017] S25, control the cross machine workpiece measuring head to move through the machine tool, measure the position (X2, Y2, Z2) of the standard ball in the machine tool coordinate axis by using No. II measuring needle, and compensate the offset data of No. II measuring needle by the measurement result of No. II measuring needle;

[0018] S26, control the cross machine workpiece measuring head to move through the machine tool, measure the position (X3, Y3, Z3) of the standard ball in the machine tool coordinate axis by using No. III measuring needle, and compensate the offset data of No. III measuring needle by the measurement result of No. III measuring needle.

[0019] Preferably, in the step S24, the measurement position (X1, Y1, Z1) comprises the following steps:

[0020] Select five measurement points on the calibration ball which intersect with the machine tool coordinate axis; four measurement points are located on the equator of the calibration ball, which are respectively the first measurement point intersecting with the positive direction of Y axis, the second measurement point intersecting with the negative direction of Y axis, the third measurement point intersecting with the positive direction of Z axis, and the fourth measurement point intersecting with the negative direction of Z axis; the remaining one measurement point is the fifth measurement point, which is located at the top point of the calibration ball body intersecting with the X axis of the machine tool coordinate axis;

[0021] Move No. I measuring needle to the vicinity of the first measurement point through the machine tool, measure along the negative direction of Y axis of the machine tool coordinate system to obtain the measurement value Y1';

[0022] Move No. I measuring needle to the vicinity of the second measurement point through the machine tool, measure along the positive direction of Y axis of the machine tool coordinate system to obtain the measurement value Y1";

[0023] Move No. I measuring needle to the vicinity of the third measurement point through the machine tool, measure along the negative direction of Z axis of the machine tool coordinate system to obtain the measurement value Z1'.

[0024] Move the first probe to the vicinity of the fourth measuring point by the machine tool, and measure along the positive direction of the Z-axis of the machine tool coordinate system to obtain the measured value Z1";

[0025] Move the first probe to the vicinity of the fifth measuring point by the machine tool, and measure along the negative direction of the X-axis of the machine tool coordinate system to obtain the measured value X1';

[0026] Calculate the center position (X1, Y1, Z1) of the sphere, wherein X1 = X1'- d / 2, Y1 = (Y1' + Y1") / 2, and Z1 = (Z1' + Z1") / 2, and d represents the diameter of the calibration sphere.

[0027] Preferably, in the step S25, the measuring position (X2, Y2, Z2) comprises the following steps:

[0028] Select five measuring points on the calibration sphere that intersect with the machine tool coordinate axes; wherein three measuring points are respectively in the vicinity of the second measuring point, the third measuring point and the fourth measuring point in the step S24; and the remaining two measuring points are respectively the sixth measuring point intersecting with the negative direction of the X-axis and the seventh measuring point intersecting with the positive direction of the X-axis;

[0029] Move the second probe to the third measuring point by the machine tool, and measure along the negative direction of the Z-axis of the machine tool coordinate system to obtain the measured value Z2';

[0030] Move the second probe to the fourth measuring point by the machine tool, and measure along the positive direction of the Z-axis of the machine tool coordinate system to obtain the measured value Z2";

[0031] Move the second probe to the sixth measuring point by the machine tool, and measure along the positive direction of the X-axis of the machine tool coordinate system to obtain the measured value X2';

[0032] Move the second probe to the seventh measuring point by the machine tool, and measure along the negative direction of the X-axis of the machine tool coordinate system to obtain the measured value X2";

[0033] Move the second probe to the second measuring point by the machine tool, and measure along the negative direction of the Y-axis of the machine tool coordinate system to obtain the measured value Y2';

[0034] Calculate the center position (X2, Y2, Z2) of the sphere, wherein X2 = (X2' + X2") / 2, Y2 = Y2'- d / 2, and Z2 = (Z2' + Z2") / 2;

[0035] Calculate the center position deviation, comprising: x' = X2 - X1, y' = Y2 - Y1, and z' = Z2 - Z1;

[0036] Write the center position deviation data into the machine tool cutter compensation data, and add the original probe offset compensation data to accurately compensate the probe offset data.

[0037] Preferably, in the step S26, the measuring position (X3, Y3, Z3) comprises the following steps:

[0038] Selecting five measuring points on the calibration ball which intersect with the machine tool coordinate axes; wherein, three measuring points are respectively the first measuring point, the third measuring point and the fourth measuring point in the step S24; the remaining two measuring points are respectively the sixth measuring point intersecting with the negative direction of the X axis and the seventh measuring point intersecting with the positive direction of the X axis;

[0039] Moving the third measuring needle to the third measuring point by the machine tool, measuring along the negative direction of the Z axis of the machine tool coordinate system to obtain a measuring value Z3';

[0040] Moving the third measuring needle to the fourth measuring point by the machine tool, measuring along the positive direction of the Z axis of the machine tool coordinate system to obtain a measuring value Z3";

[0041] Moving the third measuring needle to the sixth measuring point by the machine tool, measuring along the positive direction of the X axis of the machine tool coordinate system to obtain a measuring value X3';

[0042] Moving the third measuring needle to the seventh measuring point by the machine tool, measuring along the negative direction of the X axis of the machine tool coordinate system to obtain a measuring value X3";

[0043] Moving the third measuring needle to the first measuring point by the machine tool, measuring along the negative direction of the Y axis of the machine tool coordinate system to obtain a measuring value Y3';

[0044] Calculating the ball center position (X3, Y3, Z3), wherein, X3=(X3'+X3") / 2, Y3=Y3'-d / 2, Z3=(Z3'+Z3") / 2;

[0045] Calculating the ball center position deviation, comprising: x"=X3-X1, y"=Y3-Y1, z"=Z3-Z1;

[0046] Writing the ball center position deviation data into the machine tool cutter compensation data, and performing addition operation with the original measuring head offset compensation data to accurately compensate the measuring head offset data.

[0047] Preferably, in the step S3, the earpiece end face alignment comprises the following steps:

[0048] S31, selecting two measuring points a point and b point on the earpiece end face which are on the YZ plane of the machine tool coordinate system; wherein, the a point is on the positive direction of the Z axis of the machine tool coordinate system, and the b point is on the negative direction of the Z axis of the machine tool coordinate system;

[0049] S32, measure the points a and b by the No. Ⅱ probe under the control of the machine tool, obtain the coordinate measurement values (Xa, Ya, Za) and (Xb, Yb, Zb), and calculate the angle a between the straight line ab and the Z axis of the machine tool coordinate system based on the coordinate measurement values, a = arctan((Ya-Yb) / (Za-Zb));

[0050] S33, rotate the workpiece coordinate system around its X axis by the angle a, and rotate the machine tool rotary shaft A by the angle a;

[0051] S34, select two measurement points c and d on the earpiece end surface, which are located on the YX plane of the machine tool coordinate system; wherein the point c is located on the positive direction of the X axis of the machine tool coordinate system, and the point d is located on the negative direction of the X axis of the machine tool coordinate system;

[0052] S35, measure the points c and d by the No. Ⅱ probe under the control of the machine tool, obtain the coordinate measurement values (Xc, Yc, Zc) and (Xd, Yd, Zd), and calculate the angle β between the straight line cd and the X axis of the machine tool coordinate system based on the coordinate measurement values, β = arctan((Ya-Yb) / (Xa-Xb));

[0053] S36, rotate the workpiece coordinate system around its Z axis by the angle β, and rotate the machine tool rotary shaft B by the angle β;

[0054] S37, measure an arbitrary point on the earpiece end surface by the No. Ⅱ probe under the control of the machine tool, obtain the offset value of the earpiece end surface relative to the workpiece coordinate system, and write the offset value into the machine tool zero point offset.

[0055] Preferably, in the step S4, the trajectory planning of the annular laminated structure comprises the following steps:

[0056] S41, let the intersection of the earpiece annular material axis and the earpiece end surface be the programming zero point coordinate O, and preset to process in the mode of layered side milling;

[0057] S42: determine the known parameters, including the inner diameter D1 and the outer diameter D2 of the earpiece annular material, the highest point H1 and the lowest point H5 of the earpiece annular material; the earpiece annular material includes an annular part, a non-annular part and a remaining material part, and the known parameters further include the maximum cutting depth AP1 of each layer of the non-annular part, the maximum cutting depth AP2 of each layer of the annular part and the pole point H2 of the annular part, wherein AP1>AP2;

[0058] S43: preset to process the non-annular part, the annular part and the remaining material part respectively based on the known parameters.

[0059] Preferably, in the step S43, the non-annular part is preset to be processed, that is, to be cut to the pole point H2 of the annular part at the depth of AP1, and then the side blade cutting is used for processing.

[0060] Preferably, in the step S43, the preset machining annular portion comprises:

[0061] When the annular ear material thickness (D2-D1) > AP2, the annular portion is layered cut at AP2 depth;

[0062] When the annular ear material thickness (D2-D1) < AP2, the annular portion is layered cut at AP1 depth to H3 point, and then the annular portion is layered cut at AP2 depth from H3 point to H4 point;

[0063] Wherein, H3 point is in the positive direction of the workpiece coordinate system X axis, and H4 point is in the negative direction of the workpiece coordinate system X axis;

[0064] Preferably, in the step S43, the preset machining remaining material portion, that is, when the cutting in the negative direction of the workpiece coordinate system X axis satisfies the condition that the number of layers n x AP2 > OH3, the remaining material is layered cut at AP1 depth.

[0065] The beneficial effects of the present application are:

[0066] The ear end face finishing machining method provided by the present application combines ear end face alignment and optimal layered trajectory planning of annular layered structure, ensures the continuous stability of ear machining process, can quickly allocate cutting depth according to different materials and sizes, plans cutting trajectory, is higher in efficiency than traditional uniform cutting depth, incremental cutting depth and decreasing cutting depth, effectively improves ear end face machining precision and speed, and improves production efficiency. That is, the ear machining efficiency is improved, and the ear machining precision is effectively improved. Furthermore, the cross-shaped machine tool workpiece probe is used, a set of accurate and continuous probe calibration process is specially designed, and a reliable basis is provided for ear end face accurate alignment.

[0067] For the aircraft production process involving many supply chain links, the cost gradually decreases for the fixed process flow and scheme of the structural frame, and the fatigue life of the aircraft body can be significantly improved after the process method of the end process is changed. However, the use of the method will greatly change the process method of the front-end process, and the cost of the front-end production will increase. The ear end face finishing machining method provided by the present application can greatly reduce the cost of the aircraft production chain. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 The structure diagram of the cross-shaped machine tool workpiece probe used in the present application is shown in the figure;

[0069] Figure 2 The calibration ball measurement point distribution diagram of a preferred scheme of the present application is shown in the figure Figure I ;

[0070] Figure 3 The distribution of measuring points of the reference sphere of a preferred embodiment of the present application Figure II

[0071] Figure 4 The distribution of measuring points of the end face of the ear piece of the present application

[0072] Figure 5 The calculation of the angle of the end face of the ear piece of the present application

[0073] Figure 6 The milling path of the annular part of the annular material of the ear piece of the present application

[0074] Figure 7 The milling path of the non-annular part of the annular material of the ear piece of the present application

[0075] In the figure:

[0076] 1. Cross-shaped machine tool workpiece measuring head; 1.1, No. I measuring needle; 1.2, No. II measuring needle; 1.3, No. III measuring needle; 2, reference sphere; 3, first measuring point; 4, second measuring point; 5, third measuring point; 6, fourth measuring point; 7, fifth measuring point; 8, sixth measuring point; 9, seventh measuring point; 10, ear piece to be processed; 11, point a; 12, point b; 13, point c; 14, point d; 15, milling cutter; 16, milling path. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0078] Therefore, the following detailed description of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0079] Embodiment 1

[0080] The present embodiment discloses an ear piece end face finishing method, as a basic embodiment of the technical scheme, comprising the following steps:

[0081] S1: Selecting a cross-shaped machine tool workpiece measuring head 1 as shown in Figure 1

[0082] S2, Measuring needle calibration of the cross-shaped machine tool workpiece measuring head 1;

[0083] ​​S3, use the calibrated cross machine workpiece probe 1 to find the ear piece end face;

[0084] S4, corresponding to the ear piece end face, the ear piece ring material (to be processed ear piece 10) is processed into a ring-shaped structure trajectory planning;

[0085] S5, based on the planned ring-shaped structure trajectory, the ear piece ring material (to be processed ear piece 10) is processed.

[0086] Example 2

[0087] The embodiment discloses an ear piece end face finishing machining method, as a preferred embodiment of the technical scheme, comprising the following steps:

[0088] S1: select the cross machine workpiece probe 1 as shown in Figure 1

[0089] S2, the measuring needle of cross machine workpiece probe 1 is calibrated; specifically including the following steps:

[0090] S21, install the cross machine workpiece probe 1 on the spindle of the machine tool, and let the measuring needle coaxial with the spindle of the machine tool in the cross machine workpiece probe 1 be No. 1 measuring needle 1.1, and the other two be No. 2 measuring needle 1.2 and No. 3 measuring needle 1.3;

[0091] S22, install the standard diameter size calibration ball 2 on the machine tool, and make the support rod of the calibration ball 2 parallel to the spindle tool axis on the machine tool;

[0092] S23, activate the machine tool 1 zero point offset;

[0093] S24, move the cross machine workpiece probe 1 by machine tool control, measure the position (X1, Y1, Z1) of the standard ball in the machine tool coordinate axis by No. 1 measuring needle 1.1, and update the position data to the activated zero point offset;

[0094] S25, move the cross machine workpiece probe 1 by machine tool control, measure the position (X2, Y2, Z2) of the standard ball in the machine tool coordinate axis by No. 2 measuring needle 1.2, and compensate the offset data of No. 2 measuring needle 1.2 by the measurement result of No. 2 measuring needle 1.2;

[0095] S26, move the cross machine workpiece probe 1 by machine tool control, measure the position (X3, Y3, Z3) of the standard ball in the machine tool coordinate axis by No. 3 measuring needle 1.3, and compensate the offset data of No. 3 measuring needle 1.3 by the measurement result of No. 3 measuring needle 1.3;

[0096] S3, use the calibrated cross machine workpiece probe 1 to find the ear piece end face; ​

[0097] S4, corresponding to the aligned ear piece end face, ear piece ring material (to be processed ear piece 10) is carried out annular laminated structure trajectory planning;

[0098] S5, based on the planned annular laminated structure trajectory ear piece ring material (to be processed ear piece 10) is processed.

[0099] Embodiment 3

[0100] This embodiment discloses a kind of ear piece end face finishing machining method, as a preferred embodiment of the technical solution, i.e. in embodiment 2, measurement position (X1, Y1, Z1) includes the following steps:

[0101] Select five measurement points on the calibration ball 2 intersecting with the machine tool coordinate axis;Among them, four measurement points are located on the equator of the calibration ball 2, respectively, the first measurement point 3 intersecting with the positive direction of Y axis, the second measurement point 4 intersecting with the negative direction of Y axis, the third measurement point 5 intersecting with the positive direction of Z axis and the fourth measurement point 6 intersecting with the negative direction of Z axis;The remaining one measurement point is the fifth measurement point 7, which is located at the vertex of the calibration ball 2 sphere intersecting with the machine tool coordinate axis X;

[0102] Move the first measuring needle 1.1 to the vicinity of the first measurement point 3 by the machine tool, measure along the negative direction of the machine tool coordinate system Y axis, and obtain the measurement value Y1';

[0103] Move the first measuring needle 1.1 to the vicinity of the second measurement point 4 by the machine tool, measure along the positive direction of the machine tool coordinate system Y axis, and obtain the measurement value Y1'';

[0104] Move the first measuring needle 1.1 to the vicinity of the third measurement point 5 by the machine tool, measure along the negative direction of the machine tool coordinate system Z axis, and obtain the measurement value Z1';

[0105] Move the first measuring needle 1.1 to the vicinity of the fourth measurement point 6 by the machine tool, measure along the positive direction of the machine tool coordinate system Z axis, and obtain the measurement value Z1'';

[0106] Move the first measuring needle 1.1 to the vicinity of the fifth measurement point 7 by the machine tool, measure along the negative direction of the machine tool coordinate system X axis, and obtain the measurement value X1';

[0107] Calculate the position of the ball center (X1, Y1, Z1), wherein X1=X1'-d / 2, Y1=(Y1'+Y1'') / 2, Z1=(Z1'+Z1'') / 2, and d represents the diameter of the calibration ball 2.

[0108] Measurement position (X2, Y2, Z2) includes the following steps:

[0109] Select five measuring points on the calibration ball 2 which intersect with the machine tool coordinate axes; among them, three measuring points are respectively near the first measuring point 3, the third measuring point 5 and the fourth measuring point 6 in the step S24; the remaining two measuring points are respectively the sixth measuring point 8 intersecting with the negative direction of the X axis and the seventh measuring point 9 intersecting with the positive direction of the X axis;

[0110] Move the second measuring needle 1.2 to the third measuring point 5 through the machine tool, measure along the negative direction of the Z axis of the machine tool coordinate system, and obtain the measurement value Z2';

[0111] Move the second measuring needle 1.2 to the fourth measuring point 6 through the machine tool, measure along the positive direction of the Z axis of the machine tool coordinate system, and obtain the measurement value Z2";

[0112] Move the second measuring needle 1.2 to the sixth measuring point 8 through the machine tool, measure along the positive direction of the X axis of the machine tool coordinate system, and obtain the measurement value X2';

[0113] Move the second measuring needle 1.2 to the seventh measuring point 9 through the machine tool, measure along the negative direction of the X axis of the machine tool coordinate system, and obtain the measurement value X2";

[0114] Move the second measuring needle 1.2 to the second measuring point 4 through the machine tool, measure along the negative direction of the Y axis of the machine tool coordinate system, and obtain the measurement value Y2';

[0115] Calculate the ball center position (X2, Y2, Z2), wherein X2=(X2'+X2") / 2, Y2=Y2'-d / 2, and Z2=(Z2'+Z2") / 2;

[0116] Calculate the ball center position deviation, including: x'=X2-X1, y'=Y2-Y1, and z'=Z2-Z1;

[0117] Write the ball center position deviation data into the machine tool cutter compensation data, and add the original measuring head offset compensation data to accurately compensate the measuring head offset data.

[0118] The measurement position (X3, Y3, Z3) includes the following steps:

[0119] Select five measuring points on the calibration ball 2 which intersect with the machine tool coordinate axes; among them, three measuring points are respectively near the first measuring point 3, the third measuring point 5 and the fourth measuring point 6 in the step S24; the remaining two measuring points are respectively the sixth measuring point 8 intersecting with the negative direction of the X axis and the seventh measuring point 9 intersecting with the positive direction of the X axis;

[0120] Move the third measuring needle 1.3 to the third measuring point 5 through the machine tool, measure along the negative direction of the Z axis of the machine tool coordinate system, and obtain the measurement value Z3';

[0121] Move the No. 3 gauge pin 1.3 to the fourth measuring point 6 by the machine tool, measure along the positive direction of the Z axis of the machine tool coordinate system, and obtain the measurement value Z3";

[0122] Move the No. 3 gauge pin 1.3 to the sixth measuring point 8 by the machine tool, measure along the positive direction of the X axis of the machine tool coordinate system, and obtain the measurement value X3';

[0123] Move the No. 3 gauge pin 1.3 to the seventh measuring point 9 by the machine tool, measure along the negative direction of the X axis of the machine tool coordinate system, and obtain the measurement value X3";

[0124] Move the No. 3 gauge pin 1.3 to the first measuring point 3 by the machine tool, measure along the negative direction of the Y axis of the machine tool coordinate system, and obtain the measurement value Y3';

[0125] Calculate the ball center position (X3, Y3, Z3), wherein X3 = (X3' + X3") / 2, Y3 = Y3'-d / 2, and Z3 = (Z3' + Z3") / 2;

[0126] Calculate the ball center position deviation, including: x" = X3-X1, y" = Y3-Y1, and z" = Z3-Z1;

[0127] Write the ball center position deviation data into the machine tool cutter compensation data, and add the original measuring head offset compensation data to accurately compensate the measuring head offset data.

[0128] Embodiment 4

[0129] The embodiment discloses an ear piece end face finishing method, as a preferred embodiment of the technical solution, comprising the following steps:

[0130] S1, select a cross-shaped machine tool workpiece measuring head 1;

[0131] S2, calibrate the gauge pin of the cross-shaped machine tool workpiece measuring head 1;

[0132] S3, use the calibrated cross-shaped machine tool workpiece measuring head 1 to align the ear piece end face; specifically comprising the following steps: S31, select two measuring points a point 11 and b point 12 on the ear piece end face in the YZ plane of the machine tool coordinate system; wherein the a point 11 is in the positive direction of the Z axis of the machine tool coordinate system, and the b point 12 is in the negative direction of the Z axis of the machine tool coordinate system;

[0133] S32, measure a point 11 and b point 12 by the machine tool control No. 2 gauge pin 1.2, obtain the coordinate measurement values (Xa, Ya, Za), (Xb, Yb, Zb), and calculate the angle α between the straight line ab and the Z axis of the machine tool coordinate system based on the coordinate measurement values, α = arctan((Ya-Yb) / (Za-Zb));

[0134] S33, rotate the workpiece coordinate system around its X axis by an angle a, and rotate the machine tool rotary axis A by an angle a;

[0135] S34, select two measurement points c point 13 and d point 14 on the ear piece end face in the machine tool coordinate system YX plane; wherein the c point 13 is in the positive direction of the X axis of the machine tool coordinate system, and the d point 14 is in the negative direction of the X axis of the machine tool coordinate system;

[0136] S35, measure the c point 13 and the d point 14 by the machine tool control No. 2 measuring needle 1.2 to obtain coordinate measurement values (Xc, Yc, Zc), (Xd, Yd, Zd), and calculate the angle β of the straight line cd with the X axis of the machine tool coordinate system based on the coordinate measurement values, β = arctan ((Ya-Yb) / (Xa-Xb));

[0137] S36, rotate the workpiece coordinate system around its Z axis by an angle β, and rotate the machine tool rotary axis B by an angle β;

[0138] S37, measure any point on the ear piece end face by the machine tool control No. 2 measuring needle 1.2 to obtain the offset value of the ear piece end face relative to the workpiece coordinate system, and write the offset value into the machine tool zero point offset;

[0139] S4, corresponding to the found ear piece end face, the ear piece ring material (to be processed ear piece 10) is subjected to ring layer structure trajectory planning;

[0140] S5, based on the planned ring layer structure trajectory, the ear piece ring material (to be processed ear piece 10) is processed.

[0141] Example 5

[0142] The embodiment discloses an ear piece end face finishing machining method, as a preferred embodiment of the technical solution, comprising the following steps:

[0143] S1, select a cross type machine tool workpiece measuring head 1;

[0144] S2, calibrate the measuring needle of the cross type machine tool workpiece measuring head 1;

[0145] S3, use the calibrated cross type machine tool workpiece measuring head 1 to find the ear piece end face;

[0146] S4, corresponding to the found ear piece end face, the ear piece ring material (to be processed ear piece 10) is subjected to ring layer structure trajectory planning; specifically comprising the following steps:

[0147] S41, let the intersection of the ear piece ring material (to be processed ear piece 10) axis and the ear piece end face be the programming zero point coordinate O, and preset to process by adopting the layered side milling mode;

[0148] S42: Determine the known parameters, including the inner diameter D1 and the outer diameter D2 of the earpiece annular material (to-be-processed earpiece 10), the highest point H1 and the lowest point H5 of the earpiece annular material (to-be-processed earpiece 10); the earpiece annular material (to-be-processed earpiece 10) includes an annular portion, a non-annular portion, and a remaining material portion, and the known parameters further include a maximum cutting depth AP1 of each layer of the non-annular portion, a maximum cutting depth AP2 of each layer of the annular portion, and a pole point H2 of the annular portion, wherein AP1>AP2;

[0149] S43: Based on the known parameters, the non-annular portion, the annular portion, and the remaining material portion are respectively preset for processing.

[0150] S5, based on the planned annular layer structure trajectory, the earpiece annular material (to-be-processed earpiece 10) is processed.

[0151] Embodiment 6

[0152] This embodiment discloses an earpiece end face finishing machining method, which is a preferred embodiment of the technical solution, that is, in embodiment 5, the non-annular portion is preset for processing, that is, the layered cutting is performed to the pole point H2 of the annular portion at the depth of AP1, and the side edge cutting is used for processing.

[0153] The preset processing of the annular portion includes:

[0154] When the thickness (D2-D1) of the annular earpiece material is greater than AP2, the annular portion is layered cut at the depth of AP2;

[0155] When the thickness (D2-D1) of the annular earpiece material is less than AP2, the annular portion is layered cut to the point H3 at the depth of AP1, and then the annular portion is layered cut to the point H4 at the depth of AP2 from the point H3;

[0156] Wherein, the point H3 is in the positive direction of the X-axis of the workpiece coordinate system, and the point H4 is in the negative direction of the X-axis of the workpiece coordinate system;

[0157] The remaining material portion is preset for processing, that is, when the cutting in the negative direction of the X-axis of the workpiece coordinate system is performed, the condition that the number of cutting layers n×AP2>OH3 is satisfied, and the remaining material is layered cut at the depth of AP1.

[0158] Embodiment 7

[0159] This embodiment discloses an earpiece end face finishing machining method, which is a preferred embodiment of the technical solution, and includes the following steps:

[0160] S1: Select a cross-shaped machine tool workpiece measuring head 1 as shown in Figure 1

[0161] ​S2, calibrate the measuring needle of the cross machine workpiece measuring head 1. Specifically, the following steps are included:

[0162] S21, install the cross machine workpiece measuring head 1 on the spindle of the machine tool, and let the measuring needle coaxial with the spindle of the machine tool be No. 1 measuring needle 1.1, and the other two be No. 2 measuring needle 1.2 and No. 3 measuring needle 1.3 (as shown in Figure 1 );

[0163] S22, install the standard diameter size calibration ball 2 on the machine tool, and make the support rod of the calibration ball 2 parallel to the spindle tool axis on the machine tool;

[0164] S23, activate the zero point offset of the machine tool 1;

[0165] S24, move the cross machine workpiece measuring head 1 by controlling the machine tool, measure the position (X1, Y1, Z1) of the standard ball in the machine tool coordinate axis by No. 1 measuring needle 1.1, and update the position data to the activated zero point offset; that is:

[0166] As shown in Figure 2 , select five measuring points on the calibration ball 2 which intersect with the machine tool coordinate axis; four of the measuring points are located on the equator of the calibration ball 2, which are the first measuring point 3 intersecting with the positive direction of the Y axis, the second measuring point 4 intersecting with the negative direction of the Y axis, the third measuring point 5 intersecting with the positive direction of the Z axis, and the fourth measuring point 6 intersecting with the negative direction of the Z axis; the remaining one measuring point is the fifth measuring point 7, which is located at the vertex of the calibration ball 2 intersecting with the X axis of the machine tool coordinate axis;

[0167] Move No. 1 measuring needle 1.1 to the vicinity of the first measuring point 3 by the machine tool, measure along the negative direction of the Y axis of the machine tool coordinate system, and obtain the measured value Y1';

[0168] Move No. 1 measuring needle 1.1 to the vicinity of the second measuring point 4 by the machine tool, measure along the positive direction of the Y axis of the machine tool coordinate system, and obtain the measured value Y1";

[0169] Move No. 1 measuring needle 1.1 to the vicinity of the third measuring point 5 by the machine tool, measure along the negative direction of the Z axis of the machine tool coordinate system, and obtain the measured value Z1';

[0170] Move No. 1 measuring needle 1.1 to the vicinity of the fourth measuring point 6 by the machine tool, measure along the positive direction of the Z axis of the machine tool coordinate system, and obtain the measured value Z1";

[0171] Move No. 1 measuring needle 1.1 to the vicinity of the fifth measuring point 7 by the machine tool, measure along the negative direction of the X axis of the machine tool coordinate system, and obtain the measured value X1';

[0172] The center position of the ball (X1, Y1, Z1) is calculated, wherein X1=X1'-d / 2, Y1=(Y1'+Y1") / 2, and Z1=(Z1'+Z1") / 2, and d represents the diameter of the calibration ball 2.

[0173] In S25, the cross machine tool workpiece probe 1 is moved by the machine tool control, the position (X2, Y2, Z2) of the standard ball in the machine tool coordinate axis is measured by the No. 2 measuring needle 1.2, and the measurement result of the No. 2 measuring needle 1.2 is compensated for the offset data of the No. 2 measuring needle 1.2; that is:

[0174] As shown in Figure 3 , five measurement points intersecting with the machine tool coordinate axis are selected on the calibration ball 2; wherein three measurement points are respectively near the second measurement point 4, the third measurement point 5 and the fourth measurement point 6 in the step S24; and the remaining two measurement points are respectively the sixth measurement point 8 intersecting with the negative direction of the X axis and the seventh measurement point 9 intersecting with the positive direction of the X axis;

[0175] The No. 2 measuring needle 1.2 is moved to the third measurement point 5 by the machine tool, and measurement is performed in the negative direction of the Z axis of the machine tool coordinate system to obtain a measurement value Z2';

[0176] The No. 2 measuring needle 1.2 is moved to the fourth measurement point 6 by the machine tool, and measurement is performed in the positive direction of the Z axis of the machine tool coordinate system to obtain a measurement value Z2";

[0177] The No. 2 measuring needle 1.2 is moved to the sixth measurement point 8 by the machine tool, and measurement is performed in the positive direction of the X axis of the machine tool coordinate system to obtain a measurement value X2';

[0178] The No. 2 measuring needle 1.2 is moved to the seventh measurement point 9 by the machine tool, and measurement is performed in the negative direction of the X axis of the machine tool coordinate system to obtain a measurement value X2";

[0179] The No. 2 measuring needle 1.2 is moved to the second measurement point 4 by the machine tool, and measurement is performed in the negative direction of the Y axis of the machine tool coordinate system to obtain a measurement value Y2';

[0180] The center position of the ball (X2, Y2, Z2) is calculated, wherein X2=(X2'+X2") / 2, Y2=Y2'-d / 2, and Z2=(Z2'+Z2") / 2.

[0181] The center position deviation of the ball is calculated, including: x'=X2-X1, y'=Y2-Y1, and z'=Z2-Z1.

[0182] The center position deviation data of the ball is written into the machine tool cutter compensation data, and the original probe offset compensation data is added to accurately compensate the probe offset data.

[0183] S26, moving the workpiece probe 1 of the cross-type machine tool by machine tool control, measuring the position (X3, Y3, Z3) of the standard ball in the machine tool coordinate axis by the No. 3 measuring needle 1.3, and compensating the bias data of the No. 3 measuring needle 1.3 by the measurement result of the No. 3 measuring needle 1.3; that is:

[0184] Five measurement points intersecting with the machine tool coordinate axis are selected on the calibration ball 2; among them, three measurement points are respectively the first measurement point 3, the third measurement point 5 and the fourth measurement point 6 in the step S24; and the remaining two measurement points are respectively the sixth measurement point 8 intersecting with the negative direction of the X axis and the seventh measurement point 9 intersecting with the positive direction of the X axis;

[0185] The No. 3 measuring needle 1.3 is moved to the third measurement point 5 by the machine tool, and measurement is performed in the negative direction of the Z axis of the machine tool coordinate system to obtain a measurement value Z3';

[0186] The No. 3 measuring needle 1.3 is moved to the fourth measurement point 6 by the machine tool, and measurement is performed in the positive direction of the Z axis of the machine tool coordinate system to obtain a measurement value Z3";

[0187] The No. 3 measuring needle 1.3 is moved to the sixth measurement point 8 by the machine tool, and measurement is performed in the positive direction of the X axis of the machine tool coordinate system to obtain a measurement value X3';

[0188] The No. 3 measuring needle 1.3 is moved to the seventh measurement point 9 by the machine tool, and measurement is performed in the negative direction of the X axis of the machine tool coordinate system to obtain a measurement value X3";

[0189] The No. 3 measuring needle 1.3 is moved to the first measurement point 3 by the machine tool, and measurement is performed in the negative direction of the Y axis of the machine tool coordinate system to obtain a measurement value Y3';

[0190] The ball center position (X3, Y3, Z3) is calculated, wherein X3=(X3'+X3") / 2, Y3=Y3'-d / 2, and Z3=(Z3'+Z3") / 2;

[0191] The ball center position bias is calculated, including x"=X3-X1, y"=Y3-Y1, and z"=Z3-Z1.

[0192] The ball center bias data is written into the machine tool cutter compensation data, and the original probe bias compensation data is added to accurately compensate the probe bias data.

[0193] S3, using the calibrated cross-type machine tool workpiece probe 1 to find the ear piece end face. Specifically, the following steps are included:

[0194] S31, selecting two measurement points a point 11 and b point 12 on the ear piece end face in the YZ plane of the machine tool coordinate system; among them, the a point 11 is in the positive direction of the Z axis of the machine tool coordinate system, and the b point 12 is in the negative direction of the Z axis of the machine tool coordinate system;

[0195] S32, measure the points 11 and 12 by the No. 2 measuring needle 1.2 under the control of the machine tool, obtain the coordinate measurement values (Xa, Ya, Za), (Xb, Yb, Zb), and calculate the angle a between the straight line ab and the Z axis of the machine tool coordinate system based on the coordinate measurement values, as shown in the formula, a = arctan((Ya-Yb) / (Za-Zb)); Figure 5

[0196] S33, rotate the workpiece coordinate system around the X axis by an angle a, and rotate the rotary shaft A of the machine tool by an angle a; wherein the rotation direction of the workpiece coordinate system and the rotary shaft A is determined according to the "+" or "-" sign of the calculation result;

[0197] S34, select two measurement points 13 and 14 on the ear piece end surface, which are on the YX plane of the machine tool coordinate system; wherein the point 13 is on the positive direction of the X axis of the machine tool coordinate system, and the point 14 is on the negative direction of the X axis of the machine tool coordinate system;

[0198] S35, measure the points 13 and 14 by the No. 2 measuring needle 1.2 under the control of the machine tool, obtain the coordinate measurement values (Xc, Yc, Zc), (Xd, Yd, Zd), and calculate the angle b between the straight line cd and the X axis of the machine tool coordinate system based on the coordinate measurement values, as shown in the formula, b = arctan((Ya-Yb) / (Xa-Xb)); Figure 5

[0199] S36, rotate the workpiece coordinate system around the Z axis by an angle b, and rotate the rotary shaft B of the machine tool by an angle b; wherein the rotation direction of the workpiece coordinate system and the rotary shaft B is determined according to the "+" or "-" sign of the calculation result;

[0200] S37, measure any point on the ear piece end surface by the No. 2 measuring needle 1.2 under the control of the machine tool, obtain the offset value of the ear piece end surface relative to the workpiece coordinate system, and write the offset value into the machine tool zero offset.

[0201] S4, for the ear piece end surface after alignment, perform ring-shaped laminated structure trajectory planning on the ear piece ring-shaped material (to-be-processed ear piece 10), which specifically includes the following steps:

[0202] S41, as shown in the formula, let the intersection of the ear piece ring-shaped material (to-be-processed ear piece 10) axis and the ear piece end surface be the programming zero point coordinate O, and preset to use the layered side milling method for processing; Figure 6

[0203] ​​​S42: Determine the known parameters, including the inner diameter D1 and the outer diameter D2 of the ear ring annular material, the highest point H1 and the lowest point H5 of the ear ring annular material; the ear ring annular material includes an annular portion, a non-annular portion and a remaining material portion, and the known parameters further include the maximum cutting depth AP1 of each layer of the non-annular portion, the maximum cutting depth AP2 of each layer of the annular portion, and the pole H2 of the annular portion, wherein AP1>AP2;

[0204] S43: Based on the known parameters, the non-annular portion, the annular portion and the remaining material portion are respectively preset for machining. Wherein:

[0205] As shown in Figure 6 , the non-annular portion is preset for machining, that is, it is cut to the pole H2 of the annular portion by layering cutting with a depth of AP1, and then it is machined by using side edge cutting.

[0206] As shown in Figure 7 , the preset machining of the annular portion includes:

[0207] When the thickness of the annular ear ring material (D2-D1) is greater than AP2, the annular portion is cut by layering with a depth of AP2;

[0208] When the thickness of the annular ear ring material (D2-D1) is less than AP2, the annular portion is cut by layering with a depth of AP1 to the point H3, and then the annular portion is cut by layering with a depth of AP2 from the point H3 to the point H4;

[0209] Wherein, the point H3 is in the positive direction of the X-axis of the workpiece coordinate system, and the point H4 is in the negative direction of the X-axis of the workpiece coordinate system;

[0210]

[0211] The remaining material portion is preset for machining, that is, when the cutting in the negative direction of the X-axis of the workpiece coordinate system is performed, the condition that the number of layers n×AP2 in the negative end of the X-axis is greater than OH3 is met, and then the remaining material is cut by layering with a depth of AP1.

[0212] S5, based on the planned annular layer structure trajectory, the ear ring annular material is machined.

Claims

1. A method for finishing the end face of an ear piece, characterized in that, Includes the following steps: S1, Select to use cross-shaped machine tool workpiece probe (1). S2, calibrate the probe of the cross-shaped machine tool workpiece probe (1), that is: S21, install the cross-shaped machine tool workpiece probe (1) on the spindle of the machine tool, and make the probe coaxial with the spindle of the machine tool in the cross-shaped machine tool workpiece probe (1) be probe No. I (1.1), and the other two be probe No. II (1.2) and probe No. III (1.3). S22, install a calibration ball (2) with a standard diameter on the machine tool, and make the support rod of the calibration ball (2) parallel to the spindle tool axis of the machine tool; S23, activate one zero-point offset of the machine tool; S24, the cross-shaped machine tool workpiece probe (1) is moved by the machine tool control, and the position (X1, Y1, Z1) of the standard ball in the machine tool coordinate axis is measured by the No. I probe (1.1), and the position data is updated to the activated zero point offset; S25, the cross-shaped machine tool workpiece probe (1) is moved by the machine tool control, and the position (X2, Y2, Z2) of the standard ball in the machine tool coordinate axis is measured by the No. 2 probe (1.2). The offset data of the No. 2 probe (1.2) is compensated by the measurement result of the No. 2 probe (1.2). S26, the cross-shaped machine tool workpiece probe (1) is moved by the machine tool control, and the position of the standard ball in the machine tool coordinate axis (X3, Y3, Z3) is measured by the No. Ⅲ probe (1.3). The offset data of the No. Ⅲ probe (1.3) is compensated by the measurement result of the No. Ⅲ probe (1.3); S3, using the calibrated cross-shaped machine tool workpiece probe (1), align the end face of the ear piece, that is: S31, select two measurement points a (11) and b (12) on the YZ plane of the machine tool coordinate system on the end face of the ear plate; where point a (11) is located in the positive direction of the Z axis of the machine tool coordinate system, and point b (12) is located in the negative direction of the Z axis of the machine tool coordinate system. S32, by controlling the No. 2 probe (1.2) of the machine tool to measure points a (11) and b (12), obtain coordinate measurement values ​​(Xa, Ya, Za) and (Xb, Yb, Zb), and calculate the angle α between the straight line ab and the Z axis of the machine tool coordinate system based on the coordinate measurement values, α=arctan((Ya-Yb) / (Za-Zb)); S33, rotate the workpiece coordinate system around its own X-axis by an angle α, and rotate the machine tool rotary axis A by an angle α; S34, select two measurement points c (13) and d (14) on the YX plane of the machine tool coordinate system on the end face of the ear piece; where c (13) is located in the positive X-axis direction of the machine tool coordinate system and d (14) is located in the negative X-axis direction of the machine tool coordinate system. S35, measure points c (13) and d (14) by controlling the No. 2 probe (1.2) of the machine tool to obtain coordinate measurement values ​​(Xc, Yc, Zc) and (Xd, Yd, Zd), and calculate the angle β between the straight line cd and the X-axis of the machine tool coordinate system based on the coordinate measurement values, β=arctan((Ya-Yb) / (Xa-Xb)); S36, rotate the workpiece coordinate system around its own Z-axis by an angle β, and rotate the machine tool rotary axis B by an angle β; S37, by controlling the No. 2 probe (1.2) of the machine tool to measure any point on the end face of the ear piece, obtain the offset value of the end face of the ear piece relative to the workpiece coordinate system, and write the offset value into the zero point offset of the machine tool; S4, corresponding to the aligned ear end face, performs annular layered structure trajectory planning for the ear ring material, i.e.: S41, set the intersection of the ear piece annular material axis and the ear piece end face as the programming zero point coordinate O, and preset the layered side milling method for processing; S42, Determine the known parameters, including the inner diameter of the ear ring material. and outer diameter The highest point of the ear ring material and lowest point The earpiece annular material includes an annular portion, a non-annular portion, and the remaining material. Known parameters also include the maximum depth of cut per non-annular layer. Maximum cutting depth per layer of the annular section And the poles of the ring section ,in, ; S43, based on known parameters, pre-process the non-circular part, the circular part and the remaining material part respectively; S5, based on the planned annular stacked structure trajectory, processes the ear ring material.

2. The ear piece end face finishing method as described in claim 1, characterized in that, In step S24, measuring the position (X1, Y1, Z1) includes the following steps: Five measurement points intersecting with the machine tool coordinate axes are selected on the calibration sphere (2); four of these measurement points are located on the equator of the calibration sphere (2), namely the first measurement point (3) intersecting with the positive Y-axis, the second measurement point (4) intersecting with the negative Y-axis, the third measurement point (5) intersecting with the positive Z-axis, and the fourth measurement point (6) intersecting with the negative Z-axis; the remaining measurement point is the fifth measurement point (7), located at the vertex where the calibration sphere (2) intersects with the X-axis of the machine tool. The machine tool moves probe I (1.1) to the vicinity of measurement point I (3), and measures along the negative Y-axis of the machine tool coordinate system to obtain the measurement value Y1'; The machine tool moves probe I (1.1) to the vicinity of measurement point II (4), and measures along the positive direction of the Y-axis of the machine tool coordinate system to obtain the measurement value Y1". The machine tool moves probe I (1.1) to the vicinity of measurement point III (5), and measures along the negative direction of the Z-axis of the machine tool coordinate system to obtain the measurement value Z1'; The probe I (1.1) is moved to the vicinity of the IV measurement point (6) by the machine tool, and the measurement is performed along the positive direction of the Z axis of the machine tool coordinate system to obtain the measurement value Z1". The probe I (1.1) is moved to the vicinity of the V measurement point (7) by the machine tool, and the measurement is carried out along the negative X-axis of the machine tool coordinate system to obtain the measurement value X1'; Calculate the center position of the ball (X1, Y1, Z1), where X1 = X1' - d / 2, Y1 = (Y1' + Y1") / 2, Z1 = (Z1' + Z1") / 2, and d represents the diameter of the calibration ball (2).

3. The ear piece end face finishing method as described in claim 2, characterized in that, In step S25, measuring the position (X2, Y2, Z2) includes the following steps: Five measurement points intersecting with the machine tool coordinate axes are selected on the calibration ball (2); among them, three measurement points are near the second measurement point (4), the third measurement point (5) and the fourth measurement point (6) in step S24; the remaining two measurement points are the sixth measurement point (8) intersecting with the negative direction of the X-axis and the seventh measurement point (9) intersecting with the positive direction of the X-axis. The machine tool moves probe II (1.2) to measurement point III (5) and measures along the negative Z-axis of the machine tool coordinate system to obtain the measurement value Z2'. The probe II (1.2) is moved to the fourth measurement point (6) by the machine tool, and the measurement is performed along the positive direction of the Z-axis of the machine tool coordinate system to obtain the measurement value Z2". The probe (1.2) of No. II is moved to the measurement point (8) of No. VI by the machine tool, and the measurement is carried out along the positive direction of the X-axis of the machine tool coordinate system to obtain the measurement value X2'; The probe II (1.2) is moved to the VII measurement point (9) by the machine tool, and the measurement is performed along the negative X-axis of the machine tool coordinate system to obtain the measurement value X2". The probe II (1.2) is moved to the second measurement point (4) by the machine tool, and the measurement is performed along the negative direction of the Y-axis of the machine tool coordinate system to obtain the measurement value Y2'; Calculate the position of the center of the sphere (X2, Y2, Z2), where X2 = (X2' + X2") / 2, Y2 = Y2' - d / 2, and Z2 = (Z2' + Z2") / 2. Calculate the deviation of the ball's center position, including: x'=X2-X1, y'=Y2-Y1, z'=Z2-Z1; The ball center deviation data is written into the machine tool tool compensation data and added to the original probe offset compensation data to accurately compensate for the probe offset data.

4. The ear piece end face finishing method as described in claim 2, characterized in that, In step S26, measuring the position (X3, Y3, Z3) includes the following steps: Five measurement points intersecting with the machine tool coordinate axes are selected on the calibration ball (2); among them, three measurement points are near the first measurement point (3), the third measurement point (5) and the fourth measurement point (6) in step S24; the remaining two measurement points are the sixth measurement point (8) intersecting with the negative direction of the X-axis and the seventh measurement point (9) intersecting with the positive direction of the X-axis. The machine tool moves probe III (1.3) to measurement point III (5) and measures along the negative Z-axis of the machine tool coordinate system to obtain the measurement value Z3'. The machine tool moves probe III (1.3) to measurement point IV (6) and measures along the positive direction of the Z-axis of the machine tool coordinate system to obtain the measurement value Z3". The machine tool moves probe III (1.3) to measurement point VI (8) and measures along the positive X-axis of the machine tool coordinate system to obtain the measurement value X3'. The machine tool moves probe III (1.3) to measurement point VII (9) and measures along the negative X-axis of the machine tool coordinate system to obtain the measurement value X3". The machine tool moves probe III (1.3) to measurement point I (3) and measures along the negative Y-axis of the machine tool coordinate system to obtain the measurement value Y3'. Calculate the position of the center of the sphere (X3, Y3, Z3), where X3 = (X3' + X3") / 2, Y3 = Y3' - d / 2, and Z3 = (Z3' + Z3") / 2. Calculate the deviation of the ball's center position, including: x″=X3-X1, y″=Y3-Y1, z″=Z3-Z1; The ball center deviation data is written into the machine tool tool compensation data and added to the original probe offset compensation data to accurately compensate for the probe offset data.

5. The ear piece end face finishing method as described in claim 1, characterized in that, In step S43, the non-circular portion is pre-processed, i.e., according to... Deep layer cutting to the extreme point of the annular portion. In this case, side-cutting is used for machining.

6. The method for finishing the end face of an ear piece as described in claim 1, characterized in that, In step S43, the pre-processed annular portion includes: When the thickness of the ring ear material At that time, the ring part is according to Deep layered cutting; When the thickness of the ring ear material At that time, the ring part is according to Deep layer cutting to Point, then from Starting from point, the annular section is cut in layers according to depth AP2 until... point; in, The point is located in the positive direction of the X-axis of the workpiece coordinate system. The point is located in the negative direction of the X-axis of the workpiece coordinate system; , .

7. The ear piece end face finishing method as described in claim 6, characterized in that, In step S43, the remaining material portion is pre-processed, meaning that while cutting in the negative X-axis direction of the workpiece coordinate system, the required number of cutting layers is met. × > Under the given conditions, then according to Deeply layered cutting of remaining material.

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