Correcting piece

Abstract

The utility model provides a correcting piece which comprises a columnar clamping handle and a disc-shaped correcting disc, the correcting disc is provided with an upper mounting hole, a lower mounting hole, a left mounting hole and a right mounting hole, and a detection rod is mounted in the middle of each mounting hole and divides the mounting hole into two independent windows. A correction piece is clamped on an A shaft, the A shaft drives the correction piece to rotate, detection rods are installed at the positions of an upper installation hole, a lower installation hole, a left installation hole and a right installation hole of a correction disc, a main shaft clamps the correction rods, the correction rods sequentially stretch into windows in the two sides of the detection rods till the correction rods make contact with the detection rods, current is conducted, and then position coordinates of all detection points are collected. Then the A shaft and the B shaft are respectively rotated to collect the position coordinates of all the measuring points on the front and back sides, and then the B shaft rotation axis, the A shaft rotation axis and the Z shaft zero point are calculated according to the position coordinates of all the measuring points, so that multi-dimensional reliable detection of the rotation center is realized, correction parameters are converted according to the detected parameters, the correction detection time is shortened, and the inspection and correction time and cost are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to five -axis machining center technical field, specifically is a kind of five -axis machining center clamping workpiece's corrector. BACKGROUND

[0002] Five-axis machining center has five perpendicular working axes, and its machining tool can move in X-axis, Y-axis and Z-axis directions, while workpiece needs to rotate in A-axis and B-axis directions, so that the workpiece is processed in multiple directions and multiple angles by the movement of tool in different directions and the rotation of workpiece in different directions, which can be used for machining complex curved surface parts, and can complete the machining of multiple surfaces of workpiece in one setting, greatly improving the machining efficiency and precision. For five-axis machining center, the rotation center is very important for accurate control of machining operation, and directly affects the machining precision and quality of machined parts. In order to ensure the precision and quality of machining, the rotation center of five-axis machining center needs to have high precision to ensure accurate positioning and rotation when machining parts, so as to ensure the machining quality of parts. However, the machining error, assembly error of five-axis machining center machine parts, and wear caused by long time use will affect the precision of rotation center, thereby affecting the machining quality of parts. In order to avoid these influences and ensure the machining quality of parts, the rotation center of five-axis machining center needs to be corrected at the beginning of use and after a certain period of use. At present, the correction of five-axis machining center is to measure the size of sample piece after machining, calculate the correction parameters according to the size deviation of sample piece, machine new sample piece again, measure and calculate again, and correct until the machining sample piece reaches the required precision, so as to complete the correction of rotation center. This correction method not only has many operation steps, long correction time, and is time-consuming and laborious, but also has low efficiency, and the machining operation and measurement of sample piece depend on manual work, which is easy to produce error and difficult to ensure the correction precision. CONTENT OF UTILITY MODEL

[0003] The utility model provides a kind of corrector of five-axis machining center, which has high correction efficiency and can ensure correction precision.

[0004] The corrector includes a cylindrical clamping handle and a disc-shaped correction disc. The correction disc has four mounting holes arranged in upper, lower, left and right positions. A detection rod is mounted in the middle of each mounting hole, and the mounting holes are separated into two independent windows.

[0005] The present application relates to a method for correcting the rotation center of a five-axis machining center using the above-mentioned corrector. The method includes the following steps:

[0006] S1, preparation step:

[0007] The correction piece for passing positive current is clamped on the A axis of the five-axis machining center, and the correction piece comprises a column-shaped clamping handle and a disc-shaped correction disc, the correction disc is provided with upper and lower horizontal mounting holes and left and right vertical mounting holes, a vertical detection rod is mounted in the middle of the horizontal mounting hole to divide the horizontal mounting hole into two independent windows, and a horizontal detection rod is mounted in the vertical mounting hole to divide the vertical mounting hole into two independent windows; the correction rod for passing negative current is clamped by the chuck of the main shaft of the five-axis machining center;

[0008] S2, searching for the rotation axis of the B axis step:

[0009] The correction rod is clamped by the chuck of the main shaft, and is sequentially inserted into the windows on the left and right sides of the upper and lower detection rods of the correction disc until the correction rod is in contact with the detection rods and conducts current, the distance between the two upper detection points and the distance between the two lower detection points of the correction disc are obtained through measurement, the midpoints of the distances between the two upper detection points and the two lower detection points are taken, and a vertical line is formed by connecting the two midpoints;

[0010] In the state that the B axis is 0 degrees and the A axis is 0 degrees, a first vertical center line is measured; the B axis is kept at 0 degrees, and the A axis is rotated by 180 degrees to obtain a second vertical center line; the midpoint of the distance between the first vertical center line and the second vertical center line is taken to obtain a first vertical bisector; then, the B axis is rotated by 180 degrees, and the A axis is kept at 0 degrees to obtain a third vertical center line; the B axis is kept at 180 degrees, and the A axis is rotated by 180 degrees to obtain a fourth vertical center line; the midpoint of the distance between the third vertical center line and the fourth vertical center line is taken to obtain a second vertical bisector; finally, the midline of the first vertical bisector and the second vertical bisector is taken to calculate the rotation axis of the B axis;

[0011] S3, searching for the rotation axis of the A axis step:

[0012] The correction rod is clamped by the chuck of the main shaft, and is sequentially inserted into the windows on the left and right sides of the upper and lower detection rods of the correction disc until the correction rod is in contact with the detection rods and conducts current, the distance between the two upper detection points and the distance between the two lower detection points of the correction disc are obtained through measurement, the midpoint of the distance between the two upper detection points and the two lower detection points is taken, and a vertical line is formed by connecting the two midpoints;

[0013] In the state of B axis 0 degree and A axis 0 degree, a first horizontal center line is obtained by measurement; keeping B axis 0 degree, rotating A axis 180 degrees, a second horizontal center line is obtained by measurement, taking the midpoint of the interval between the first horizontal center line and the second horizontal center line, a first horizontal bisector is obtained; then, rotating B axis 180 degrees and keeping A axis 0 degree, a third horizontal center line is obtained by measurement; keeping B axis 180 degrees, rotating A axis 180 degrees, a fourth horizontal center line is obtained by measurement; taking the midpoint of the interval between the third horizontal center line and the fourth horizontal center line, a second horizontal bisector is obtained; finally, taking the midpoint of the first horizontal bisector and the second horizontal bisector, the rotation axis of A axis is calculated;

[0014] S4, finding Z axis zero point step:

[0015] The spindle chuck clamps the correction rod, and sequentially touches and conducts current at any four positions on the surface of the correction disc, and the correction rod forms a vertical plane in the vertical direction of the four touch points;

[0016] In the state of B axis 0 degree and A axis 0 degree, a first vertical plane is obtained by measurement; in the state of B axis 0 degree and A axis 180 degree, a second vertical plane is obtained by measurement, taking the midpoint of the interval between the first vertical plane and the second vertical plane, a first bisector is formed; in the state of B axis 180 degree and A axis 0 degree, a third vertical plane is obtained by measurement; in the state of B axis 180 degree and A axis 180 degree, a fourth vertical plane is obtained by measurement; taking the midpoint of the interval between the third vertical plane and the fourth vertical plane, a second bisector is formed; taking the midpoint of the interval between the first bisector and the second bisector, the final bisector is formed, the bisector is divided by the thickness of the correction disc, the vertical plane where the Z axis zero point is located is obtained, and the center of the vertical plane is calculated, which is the Z axis zero point.

[0017] The correction member is clamped on the A axis and rotated by the A axis, and the detection rod is installed on the upper, lower, left and right four mounting holes of the correction disc, the position coordinates of each measurement point are collected after the correction rod clamped by the spindle is sequentially inserted into the windows on both sides of the detection rod until the detection rod is contacted and the current is conducted, and then the position coordinates of each measurement point on the front and back surfaces are collected by rotating the A axis and the B axis, and the rotation axis of the B axis, the rotation axis of the A axis and the Z axis zero point are calculated from the position coordinates of each measurement point, the multi-dimensional reliable detection of the rotation center is realized, the correction parameters are calculated according to the detected parameters, the correction and detection time is shortened, and the inspection and correction time and cost are saved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the correction member.

[0019] Figure 2 It is a structural schematic view of the other side of the correction member.

[0020] Figure 3 This is a schematic diagram showing the state at 0 degrees along the B axis.

[0021] Figure 4 This is a schematic diagram showing the state at 180 degrees along the B-axis. Detailed Implementation

[0022] like Figures 1-4 As shown, a calibration component includes a columnar clamping handle 1 and a disc-shaped calibration disk 2. The calibration disk has four mounting holes 3 (top, bottom, left, and right). A detection rod 4 is installed in the middle of each mounting hole, and the mounting holes are separated into two independent windows. The columnar clamping handle is used to mount the calibration disk on the A-axis rotation axis, allowing the calibration disk and the A-axis rotation axis to rotate around the same concentric axis. The detection rods are installed in the four mounting holes on the calibration disk, facilitating the spindle to grip the calibration rods and insert them sequentially into the windows on both sides of the detection rods until they contact the rods. After conducting current, the position coordinates of each measuring point are collected. This allows for the calculation of the B-axis rotation axis, the A-axis rotation axis, and the Z-axis zero point, achieving multi-dimensional reliable detection of the rotation center. Correction parameters are calculated based on the detected parameters, shortening the calibration detection time and saving inspection, calibration time, and costs.

[0023] Vertical test bars are installed in the upper and lower mounting holes, dividing the mounting holes into two independent windows, left and right. Horizontal test bars are installed in the left and right mounting holes, dividing the mounting holes into two independent windows, upper and lower.

[0024] Furthermore, the upper and lower mounting holes have downward-recessed grooves 7 along the vertical direction in the middle to accommodate the detection rod, with both ends of the vertical detection rod placed within the grooves; the left and right mounting holes also have downward-recessed grooves 7 along the horizontal direction in the middle to accommodate the detection rod, with both ends of the horizontal detection rod placed within the grooves. By providing these grooves, the detection rod can be quickly and accurately placed into the mounting holes without additional position adjustment, thus significantly improving the convenience and efficiency of operation.

[0025] Meanwhile, the back of the groove is provided with two fasteners 6 that pass through the groove and are fixed to both ends of the detection rod. Specifically, the fasteners can be screws or bolts, which can conveniently and quickly fix the detection rod in the groove.

[0026] Furthermore, the vertically mounted detection rods in the upper and lower mounting holes are located on the same vertical line. The horizontally mounted detection rods in the left and right mounting holes are on the same horizontal line, and the detection rods are also on the same horizontal line as the clamping handle.

[0027] The calibration plate on one side of the clamping handle is provided with a positioning hole 5 for the insertion of the positioning pin of the A-axis. The calibration plate can be fixedly positioned on the standard surface of the A-axis through the positioning hole, so as to avoid the calibration plate from becoming loose during rotation and affecting the detection parameters, thus ensuring the accuracy of the detection.

[0028] The installation hole is provided with an installation table for fixing the installation of the detection rod, and the two ends of the detection rod are fixed on the installation table by screws. The position of the detection rod can be adjusted by the screw fixing mode, so that the upper and lower detection rods can be adjusted to be vertically aligned, and the left and right detection rods can be adjusted to be horizontally aligned with the clamping handle.

[0029] The application relates to a method for correcting the rotary center of a five-axis machining center by using the above-mentioned correction piece, which comprises the following steps:

[0030] S1, preparation step:

[0031] The correction piece for passing positive current is clamped on the A shaft 8 of the five-axis machining center, the correction piece comprises a column-shaped clamping handle and a disc-shaped correction disc, the correction disc is provided with two horizontal installation holes and two vertical installation holes, a vertical detection rod is installed in the middle of the horizontal installation hole, the horizontal installation hole is divided into two independent windows, a horizontal detection rod is installed in the vertical installation hole, and the vertical installation hole is divided into two independent windows; the correction rod for passing negative current is clamped on the chuck of the main shaft of the five-axis machining center;

[0032] S2, finding the B shaft 9 rotation axis step:

[0033] The chuck of the main shaft clamps the correction rod, and then the correction rod is sequentially inserted into the windows on the two sides of the upper and lower detection rods above and below the correction disc until the correction rod is in contact with the detection rods and passes through the current, the distance between the two detection points above the correction disc and the distance between the two detection points below the correction disc are obtained through measurement, the midpoint of the distance between the two detection points above and the midpoint of the distance between the two detection points below are taken, and a vertical line is formed by connecting the two midpoints;

[0034] In the state that the B shaft is 0 degrees and the A shaft is 0 degrees, a first vertical center line is measured; the B shaft is kept at 0 degrees, the A shaft is rotated by 180 degrees, a second vertical center line is measured, the midpoint of the distance between the first vertical center line and the second vertical center line is taken, and a first vertical bisector is obtained; then, the B shaft is rotated by 180 degrees, the A shaft is kept at 0 degrees, a third vertical center line is measured; the B shaft is kept at 180 degrees, the A shaft is rotated by 180 degrees, a fourth vertical center line is measured; the midpoint of the distance between the third vertical center line and the fourth vertical center line is taken, and a second vertical bisector is obtained, finally, the midline of the first vertical bisector and the second vertical bisector is taken, and the rotation axis of the B shaft is calculated;

[0035] S3, finding the A shaft rotation axis step:

[0036] The spindle chuck clamps the correction rod, and sequentially extends into the upper and lower two side windows of the detection rods on the left side and the right side of the correction disc until contacting the detection rods and conducting current, respectively measures the distances between the two detection points on the left side and the two detection points on the right side of the correction disc, takes the midpoints of the distances between the detection points on the left side and the right side, and connects the two midpoints into a horizontal line;

[0037] In the state that the B axis is 0 degrees and the A axis is 0 degrees, a first horizontal center line is obtained by measurement; the B axis is kept as 0 degrees, the A axis is rotated by 180 degrees, a second horizontal center line is obtained by measurement, and a first horizontal split center line is obtained by taking the midpoint of the distance between the first horizontal center line and the second horizontal center line; then, the B axis is rotated by 180 degrees and the A axis is kept as 0 degrees, a third horizontal center line is obtained by measurement; the B axis is kept as 180 degrees, the A axis is rotated by 180 degrees, a fourth horizontal center line is obtained by measurement; a second horizontal split center line is obtained by taking the midpoint of the distance between the third horizontal center line and the fourth horizontal center line; finally, a midline of the first horizontal split center line and the second horizontal split center line is taken, and a rotation axis of the A axis is calculated;

[0038] S4, finding the Z axis zero point step:

[0039] The spindle chuck clamps the correction rod, and sequentially extends into the upper and lower two side windows of the detection rods on the left side and the right side of the correction disc until contacting the detection rods and conducting current, respectively measures the distances between the two detection points on the left side and the two detection points on the right side of the correction disc, takes the midpoints of the distances between the detection points on the left side and the right side, and connects the two midpoints into a horizontal line;

[0040] In the state that the B axis is 0 degrees and the A axis is 0 degrees, a first vertical plane is obtained by measurement; in the state that the B axis is 0 degrees and the A axis is 180 degrees, a second vertical plane is obtained by measurement, and a first split center plane is formed by taking the midpoint of the distance between the first vertical plane and the second vertical plane; in the state that the B axis is 180 degrees and the A axis is 0 degrees, a third vertical plane is obtained by measurement; in the state that the B axis is 180 degrees and the A axis is 180 degrees, a fourth vertical plane is obtained by measurement; a second split center plane is formed by taking the midpoint of the distance between the third vertical plane and the fourth vertical plane; a final center plane is formed by taking the midpoint of the distance between the first split center plane and the second split center plane, the center plane is divided by the thickness of the correction disc to obtain a vertical plane where the Z axis zero point is located, and the center of the vertical plane is calculated, that is, the Z axis zero point.

[0041] The five-axis machining center rotation center correction method, by clamping the correction part on the A axis and rotating it by the A axis, and installing detection rods at the upper, lower, left and right four mounting holes of the correction disc, the spindle clamps the correction rod and sequentially extends into the windows on both sides of the detection rod until contacting the detection rod and conducting current, and the position coordinates of each measuring point are collected. By rotating the A axis and the B axis respectively, the position coordinates of the measuring points on the front and back surfaces are collected, and then the rotation axes of the B axis and the A axis and the Z axis zero point are calculated, to realize multi-dimensional accurate detection of the rotation center. Based on the detection parameters, the correction parameters are calculated, the correction detection time is effectively shortened, and the cost of inspection and correction is reduced.

[0042] In the step of finding the Z-axis zero point, a center plane is formed between the first and second division planes, and the position coordinates of the points on the vertical plane obtained by dividing the thickness of the correction disc are marked, and then the Z-axis zero point is calculated according to the average of the position coordinates of the points.

Claims

1. A correction member characterized by, It comprises a clamping handle (1) in the shape of a column and a correction disc (2) in the shape of a disc, the correction disc is provided with four mounting holes (3) for up, down, left and right, a detection rod (4) is mounted in the middle of each mounting hole and separates the mounting holes into two independent windows.

2. The correction member according to claim 1, characterized in that, The vertical detection rods in the upper and lower mounting holes separate the mounting holes into left and right two independent windows, and the horizontal detection rods in the left and right mounting holes separate the mounting holes into upper and lower two independent windows.

3. The correction member according to claim 2, characterized in that The upper and lower mounting holes are provided with recesses (7) along the vertical direction of the middle part, which are concave downward to accommodate the detection rods, and the vertical detection rods are placed in the recesses.

4. The correction of claim 2, wherein, The left and right mounting holes are provided with recesses (7) along the horizontal direction of the middle part, which are concave downward to accommodate the detection rods, and the horizontal detection rods are placed in the recesses.

5. The correction according to claim 3 or 4, characterized in that The back of the recess is provided with two fasteners (6) that pass through the recess and fix the two ends of the detection rod.

6. The correction of claim 2, wherein, The vertical detection rods in the upper and lower mounting holes are located on the same vertical line.

7. The correction of claim 2, wherein, The horizontal detection rods in the left and right mounting holes are on the same horizontal line, and the detection rods are also on the same horizontal line as the clamping handle.

8. The correction of claim 1, wherein, The correction disc on one side of the clamping handle is provided with a positioning hole (5) for the insertion of a positioning pin for the A-axis.

9. The correction of claim 1, wherein, The mounting holes are provided with mounting tables for fixing the detection rods, and the two ends of the detection rods are fixed on the mounting tables by screws.

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