A method for finding the finishing reference of a gear mold based on in-machine measurement

Abstract

This invention discloses a method for datum alignment in gear mold precision machining based on in-machine measurement. The steps include: 1) arranging two measurement points of equal height for angle alignment on the CAD model of the gear mold; 2) generating an angle alignment measurement path; 3) based on the angle alignment in step 2), enabling "following angle alignment measurement" and "using data group number 3" to check the allowance on the mold product surface, thereby judging the alignment accuracy; 4) if the alignment accuracy in step 3) is qualified, the machining path is then processed using "following angle alignment measurement" and "using data group number 3". If the alignment accuracy in step 3) is unqualified, the measurement points for angle alignment need to be rearranged, and steps 2)-3) are repeated until the alignment accuracy is qualified. This invention achieves automatic alignment before gear mold precision machining, improves alignment accuracy, reduces manual intervention, reduces error rate, and realizes automatic connection between the datum alignment path and the machining path.

Description

Technical Field

[0001] This invention belongs to the field of gear mold manufacturing, and specifically relates to a method for calibrating the precision machining benchmark of gear molds based on in-machine measurement. Background Technology

[0002] The gear mold processing market provides strong support for the application of the company's products in the mold industry. However, a series of problems in the gear precision machining process must be solved using in-machine measurement technology. In-machine measurement technology enables automated real-time detection during product processing. Based on the deflection of the workpiece's reference angle, intelligent correction of the machining path can be achieved, ensuring the accuracy of machining positioning and thus improving the product's machining precision.

[0003] Existing methods for aligning gear molds require manual adjustment of the dial indicator using a positioning datum. This approach is inefficient and lacks precision, and the alignment accuracy depends heavily on the experience of the machining personnel. Furthermore, manual adjustment of the dial indicator cannot achieve iterative angle alignment or provide quantitative data to assess the alignment effectiveness. Summary of the Invention

[0004] The purpose of this invention is to address the problems in the prior art by providing a gear mold precision machining benchmark alignment method based on in-machine measurement, which can reduce user operations, lower the error rate, facilitate operation, and thus improve work efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention includes the following steps:

[0006] 1) Arrange the measuring points for angle alignment;

[0007] 2) Generate the angle alignment measurement path;

[0008] 2.1) Create the path "Angle Measurement 1" and enable "Angle Measurement";

[0009] 2.2) Create the "Angle Measurement 2" path and enable "Follow Measurement Angle Alignment", "Use Data Group No. 1" and "Angle Measurement";

[0010] 2.3) Create the "Angle Measurement 3" path and enable "Follow Measurement Angle Alignment", "Use Data Group Number 2", and "Angle Measurement";

[0011] 3) Based on the angle alignment in step 2), enable "Follow Measurement Angle Alignment" and "Use Data Group No. 3" to check the allowance on the mold product surface, and then judge the alignment accuracy.

[0012] 4) If the alignment accuracy in step 3) is qualified, then the processing path will start with "Follow Measurement Angle Alignment" and "Use Data Group No. 3" for processing; if the alignment accuracy in step 3) is not qualified, then the measurement points used for angle alignment need to be rearranged, and then steps 2)-3) are performed until the alignment accuracy is qualified.

[0013] Furthermore, in step 1), two measurement points of the same height are arranged on the CAD model of the gear mold for angle alignment.

[0014] Furthermore, after creating "Angle Measurement 1" in step 2.1), the measurement points arranged in the previous step are used.

[0015] Furthermore, in step 2.2), "Angle Measurement 2" is created, and the theoretical position of the measurement point is the same as that of "Angle Measurement 1".

[0016] Furthermore, in step 2.3), "Angle Measurement 3" is created, with the theoretical position of the measurement point being the same as that of "Angle Measurement 2".

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] This invention implements a method for datum alignment in the precision machining of gear molds using machine measurement technology. Through three-stage angle iteration alignment, it significantly improves alignment accuracy. Furthermore, compared to manual alignment using a dial indicator, the alignment time is greatly reduced.

[0019] This invention determines the alignment accuracy by measuring the tooth surface allowance in a machine, which is more efficient and reduces manual intervention, further lowering the technical and experience requirements for on-site process personnel.

[0020] This invention replaces manual alignment with machine measurement, allowing semi-finishing and finishing processes to proceed directly without human intervention, greatly shortening production preparation time and making it suitable for continuous, automated processing of large-volume products. Attached Figure Description

[0021] Figure 1. Schematic diagram of the gear mold precision machining benchmark alignment method based on in-machine measurement of the present invention;

[0022] Figure 1a The principle diagram of the alignment method of this invention calculates the angle between the theoretical line and the actual line in the initial coordinate system;

[0023] Figure 1b The calculation of the angle between the theoretical line and the actual line in the principle diagram of the alignment method of this invention;

[0024] Figure 1c The calculation of the angle between the theoretical line and the actual line in the principle diagram of the alignment method of this invention;

[0025] Figure 2 The flowchart of the gear mold precision machining datum alignment method based on in-machine measurement is presented in this invention;

[0026] Figure 3 This invention provides a schematic diagram of the generation of alignment measurement points.

[0027] Figure 4. Schematic diagram of the operation interface of the angle measurement 1 of the present invention;

[0028] Figure 4a A schematic diagram of the angle measurement and compensation operation interface of the present invention, angle measurement 1.

[0029] Figure 4b This invention provides a schematic diagram of the operation interface for setting specific parameters of angle measurement compensation in angle measurement 1.

[0030] Figure 5. Schematic diagram of the operation interface of the angle measurement 2 of the present invention;

[0031] Figure 5a A schematic diagram of the angle measurement and compensation operation interface of the present invention, angle measurement 2.

[0032] Figure 5b This invention provides a schematic diagram of the operation interface for setting specific parameters of angle measurement compensation in angle measurement 2.

[0033] Figure 6. Schematic diagram of the operation interface of the angle measurement 3 of the present invention;

[0034] Figure 6a A schematic diagram of the angle measurement and compensation operation interface of the present invention, angle measurement 3.

[0035] Figure 6b This invention provides a schematic diagram of the operation interface for setting specific parameters of angle measurement compensation in angle measurement 3.

[0036] Figure 7 A schematic diagram showing the distribution of measurement points for gear mold allowance detection in this invention;

[0037] Figure 8 This invention provides a schematic diagram of the margin detection and angle alignment. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings.

[0039] See Figure 1 and Figure 2 The principle and process of the gear mold precision machining datum alignment method based on in-machine measurement of the present invention are as follows:

[0040] 1) Calculate the theoretical straight line direction With the initial workpiece coordinate system The actual straight line direction below The angle between the two sides is used to obtain the initial angular deflection. .

[0041]

[0042] in: ,

[0043] 2) Use the CNC command G68 (rotate in plane) to initialize the workpiece coordinate system. Rotate around the origin in the XOY plane Angle, obtained In the workpiece coordinate system The direction of the actual straight line is obtained by measurement. Calculate the angle between the theoretical line and the actual line. .

[0044]

[0045] in:

[0046] 3) Continue using the CNC command G68 (rotate in plane) to initialize the workpiece coordinate system. Rotate around the origin in the XOY plane Angle, obtained In the workpiece coordinate system The direction of the actual straight line is obtained by measurement. Calculate the angle between the theoretical line and the actual line. .

[0047]

[0048] in:

[0049] Continue using the CNC command G68 (rotate in plane) to initialize the workpiece coordinate system. Rotate around the origin in the XOY plane Angle, obtained ,exist Next, perform a margin check. If the margin is within tolerance, it proves that the workpiece has been aligned correctly. Use directly. Perform finishing. If the allowance inspection (alignment accuracy) fails, the measuring points used for angle alignment need to be rearranged, and then alignment needs to be repeated.

[0050] The present invention provides a method for datum alignment in gear mold finishing based on in-machine measurement, comprising the following steps:

[0051] 1) See Figure 3On the CAD model of the gear mold, set up the measurement points with the correct angles. The measurement points need to be at the same height (same Z coordinate).

[0052] 2) See Figure 4a )and Figure 4b Create an "Angle Measurement 1" field, with the measurement points set up in step 1 as the measurement points, and start angle measurement. After the measurement is completed, calculate the angle between the theoretical line (the line connecting the theoretical positions of the two measurement points) and the actual line (the line connecting the actual positions of the two measurement points), and record it as angle 1. Record this angle in "Data Group No. 1".

[0053] 3) See Figure 5a )and Figure 5b Create "Angle Measurement 2," with the theoretical position of the measurement point the same as in "Angle Measurement 1." Enable "Follow Measurement Angle Alignment" and "Use Data Group Number 1," and start angle measurement. In actual measurement, the measurement path of "Angle Measurement 2" will first rotate "Angle 1" in the XY plane (completed via CNC commands) before actual measurement. After measurement, calculate the angle between the theoretical straight line (the line connecting the theoretical positions of the two measurement points) and the actual straight line (the line connecting the actual positions of the two measurement points), and record it as angle 2. Record this angle in "Data Group Number 2."

[0054] 4) See Figure 6a )and Figure 6b Create "Angle Measurement 3," with the theoretical position of the measurement point the same as in "Angle Measurement 2." Enable "Follow Measurement Angle Alignment" and "Use Data Group Number 2," and start angle measurement. In actual measurement, the measurement path of "Angle Measurement 3" will rotate within the XY plane by "angle 1 + angle 2" before actual measurement. After measurement, calculate the angle between the theoretical straight line (the line connecting the theoretical positions of the two measurement points) and the actual straight line (the line connecting the actual positions of the two measurement points), and record it as angle 3. Record this angle in "Data Group Number 3."

[0055] 5) See Figure 7 and Figure 8 Based on the angle deflection following "Angle Measurement 3", a margin check is performed, followed by a judgment of the alignment accuracy. In the actual margin check, the margin check path will rotate within the XY plane by "angle 1 + angle 2 + angle 3" before the actual check is performed. After the measurement is completed, the alignment accuracy is confirmed to be acceptable by automatically judging whether the margin distribution of the measurement points exceeds the tolerance in the NC program. If the alignment accuracy is unacceptable, the measurement points used for angle alignment need to be rearranged, and then steps 2)-5) are performed until the alignment accuracy is acceptable.

[0056] 6) Provided that the alignment accuracy is qualified, the machining path is set to "follow the measurement angle for alignment" using "data group number 3" to complete the precision machining of the gear mold.

Claims

1. A method for datum alignment in gear mold finishing based on in-machine measurement, characterized in that, Includes the following steps: 1) Arrange two measurement points of the same height on the CAD model of the gear mold for angle alignment; 2) Generate the angle alignment measurement path; 2.1) Create the "Angle Measurement 1" path and enable "Angle Measurement". The measurement points involved in the "Angle Measurement 1" path are the measurement points arranged in step 1). "Angle Measurement" calculates the line connecting the theoretical positions of the two measurement points and the initial workpiece coordinate system. The angle between the lines connecting the actual positions of the two measurement points is recorded as angle 1, and this angle 1 is recorded in "Data Group No. 1"; 2.2) Create the "Angle Measurement 2" path, enable "Follow Measurement Angle Alignment", "Use Data Group Number 1", and "Angle Measurement". The theoretical positions of the measurement points involved in the "Angle Measurement 2" path are the same as those in the "Angle Measurement 1" path. "Follow Measurement Angle Alignment" and "Use Data Group Number 1" will initialize the workpiece coordinate system. In the XOY plane, rotate around the origin by an angle of 1 to obtain... "Angle measurement" calculates the line connecting the theoretical positions of two measurement points and the coordinates in the workpiece coordinate system. The angle between the lines connecting the actual positions of the two measurement points is recorded as angle 2, and this angle is recorded in "Data Group No. 2"; 2.3) Create the "Angle Measurement 3" path, enable "Follow Measurement Angle Alignment", "Use Data Group Number 2", and "Angle Measurement". The theoretical positions of the measurement points involved in the "Angle Measurement 3" path are the same as those in the "Angle Measurement 2" path. Using "Follow Measurement Angle Alignment" and "Use Data Group Number 2" will initialize the workpiece coordinate system. In the XOY plane, rotate around the origin by (angle 1 + angle 2) to obtain the workpiece coordinate system. "Angle measurement" calculates the line connecting the theoretical positions of two measurement points to the workpiece coordinate system. The angle between the lines connecting the actual positions of the two measurement points is denoted as angle 3, and this angle is recorded in "Data Group No. 3"; 3) Based on the angle alignment in step 2), enable "Follow Measurement Angle Alignment" and "Use Data Group Number 3" to check the allowance on the mold product surface, and then judge the alignment accuracy. "Follow Measurement Angle Alignment" and "Use Data Group Number 3" will establish the initial workpiece coordinate system. In the XOY plane, rotate around the origin by (angle 1 + angle 2 + angle 3) to obtain the workpiece coordinate system. The mold product surface allowance inspection is performed in the workpiece coordinate system. The remaining margin is then checked to determine whether the remaining margin distribution at the measurement points exceeds the tolerance. 4) If the alignment accuracy in step 3) is satisfactory, then enable "Follow Measurement Angle Alignment" and "Use Data Group Number 3" in the machining path to perform machining, thereby achieving the initial workpiece coordinate system. In the XOY plane, rotate around the origin by (angle 1 + angle 2 + angle 3) to obtain the workpiece coordinate system. Using the workpiece coordinate system Perform fine machining; if the alignment accuracy in step 3) is not up to standard, the measuring points used for angle alignment need to be rearranged, and then steps 2)-3) are performed until the alignment accuracy is up to standard.

2. The gear mold precision machining datum alignment method based on in-machine measurement according to claim 1, characterized in that: Step 1) involves arranging two measurement points at the same height on the CAD model of the gear mold, i.e., the Z coordinates of the two measurement points are the same, for the purpose of angle alignment.

Images