A method for positioning the zero point of a workpiece coordinate system in the processing of a box part casting blank

Abstract

The application discloses a kind of box parts casting blank processing workpiece coordinate system zero point positioning method, comprising: S1, utilize the correction combination component on work platform and alignment tool to carry out initial positioning to first piece box parts casting blank workpiece coordinate system zero point;S2, utilize vernier caliper to carry out correction positioning to first piece box parts casting blank workpiece coordinate system zero point;S3, first piece box parts casting blank finish machining;S4, subsequent parts use first piece box parts casting blank workpiece coordinate system zero point positioning and processing.The application is convenient to operate, need not each clamping alignment tool;Measurement is simple, only needs to be assisted with commonly used measurement tool to achieve requirement;Reduce labor intensity, can effectively slow down occupational disease;Each is equivalent to two times verification, measurement is directly to the positioning and centering of part again confirmation;Auxiliary time is short, and processing accuracy is higher.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a method for zero-point positioning of the workpiece coordinate system during the machining of a casting blank for a box-shaped part. Background Technology

[0002] Casting blanks often exhibit low geometric and dimensional accuracy, large surface roughness Ra, wide tolerances, and uneven allowance distribution, making accurate positioning and centering before machining difficult. Zero-point positioning of the workpiece coordinate system has always been a challenge in the industry. Traditional methods use dial indicators to straighten and align each piece, ultimately determining only two points, which cannot represent the actual situation of the entire surface. This alignment is prone to serious errors, often resulting in incomplete machining and frequent quality problems. Furthermore, each casting blank requires re-straightening, repositioning, and coordinate value calculation before machining, making the process cumbersome. Summary of the Invention

[0003] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a method for zero-point positioning of the workpiece coordinate system during the machining of a casting blank for a box-shaped part. The first casting blank is machined using a dial indicator for detailed zero-point positioning of the workpiece coordinate system to obtain preliminary basic data. Starting with the machining of the second casting blank, the data obtained from the first blank is used to quickly correct the positioning.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A method for zero-point positioning of the workpiece coordinate system during the machining of a casting blank for a box-shaped part includes the following steps:

[0006] S1. Use the calibration assembly and alignment tool on the work platform to initially locate the zero point of the coordinate system of the first box part casting blank.

[0007] S2. Use vernier calipers to caliper and position the zero point of the coordinate system of the first box-shaped casting blank.

[0008] S3. Precision machining of the first box-type part casting blank;

[0009] S4. Subsequent parts are positioned and machined using the coordinate system of the first box-shaped casting blank.

[0010] As a preferred embodiment of the above scheme, the calibration assembly includes a T-slot and a standard block, and the alignment tool includes a dial indicator or a micrometer.

[0011] As a preferred embodiment of the above scheme, step S1 specifically includes:

[0012] S11. Place the first box-shaped part casting blank on the milling machine work platform and use the correction assembly on the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece.

[0013] S12. Rough mill the positive Z plane, remove 3 / 4 of the machining allowance, and obtain the initial finishing surface in the Z direction. This surface z0 is the zero point of the Z direction of the workpiece coordinate system.

[0014] S13. Use a dial indicator to measure and straighten two points near the two ends of the negative Y-axis outer surface to obtain a reference straight line for the negative Y-axis outer surface; use a dial indicator to measure and straighten two points near the two ends of the positive Y-axis outer surface to obtain a reference straight line for the positive Y-axis outer surface; use the two straight lines to obtain the initial zero position y0 in the Y-axis direction.

[0015] S14. Using the same method as above, obtain the initial zero position x0 in the X direction. At this time, the initial zero point of the workpiece coordinate system (x0, y0, z0) is obtained.

[0016] As a preferred embodiment of the above scheme, step S2 specifically includes:

[0017] S21. Use vernier calipers to measure the two thicknesses of the shell near the two ends in the negative Y direction, and use vernier calipers to measure the two thicknesses of the shell near the two ends in the positive Y direction. Use the four thickness dimensions to correct the zero point in the Y direction and obtain the zero point y1 in the Y direction.

[0018] S22. Obtain the y-axis correction zero position y0 using the same method described above;

[0019] S23. At this point, the zero point of the workpiece coordinate system (x1, y1, z0) is obtained. The positive Z-plane is finished to obtain the zero point of the corrected workpiece coordinate system (x1, y1, z1).

[0020] As a preferred embodiment of the above scheme, step S3 specifically includes:

[0021] S31. Use the calibration assembly to correct the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the inner surface.

[0022] S32. Use the calibration assembly to correct the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the outer surface.

[0023] S33. Use the calibration assembly to calibrate the zero point (x1, y1, z1) of the coordinate system of the casting blank of the box part and finish the remaining dimensions.

[0024] As a preferred embodiment of the above scheme, step S4 specifically includes:

[0025] S41. Place the second box-shaped part casting blank on the milling machine work platform, and use the T-slot and standard block of the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece.

[0026] S42. Rough mill the positive Z plane, remove 3 / 4 of the machining allowance, and obtain the initial finishing surface in the Z direction. This surface z2 is the zero point of the Z direction coordinate system of the second box part.

[0027] S43. Use the coordinate zero point (x1, y1, z1) of the first piece of the calibration workpiece as the coordinate zero point (x2, y2, z2) of the second piece of the box-shaped part casting blank workpiece.

[0028] S44. The zero point of the workpiece coordinate system is corrected by using the method of zero point correction and positioning of the first box part casting blank workpiece coordinate system, and the zero point (x3, y3, z3) of the second box part casting blank workpiece coordinate system is corrected.

[0029] S45. Use the casting blank of the second box part to correct the zero point (x3, y3, z3) of the workpiece coordinate system, and finish machine the remaining dimensions;

[0030] S46. Repeat steps S41 to S45 to complete the coordinate system zero-point positioning and machining of the subsequent box-shaped parts casting blanks.

[0031] Due to the above structure, the beneficial effects of the present invention are as follows:

[0032] 1. Easy to operate, no need to use clamping and alignment tools for each piece.

[0033] 2. The measurement is simple and only requires the use of common measuring tools to meet the requirements.

[0034] 3. Reducing labor intensity can effectively alleviate occupational diseases.

[0035] 4. Each piece is equivalent to two verifications, and the positioning and centering of the part are directly confirmed again during the measurement.

[0036] 5. Short auxiliary time and high processing accuracy. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0038] Figure 1 This is a flowchart of the process of the present invention;

[0039] Figure 2 This is a schematic diagram of the blank of the box body part of the present invention;

[0040] Figure 3 This is a schematic diagram of finding the zero point of the workpiece coordinate system for the blank of the box body part of the present invention;

[0041] In the figure: 1-X positive outer surface, 2-Y negative outer surface, 3-X negative outer surface, 4-Y positive outer surface, 5-X positive inner surface, 6-Y negative inner surface, 7-X negative inner and outer surfaces, 8-Y positive inner surface, AY negative outer surface measurement point I, BY negative outer surface measurement point II, CY positive outer surface measurement point I, DY positive outer surface measurement point II, t1-Y negative shell thickness I, t2-Y negative shell thickness II, t3-Y positive shell thickness I, t4-Y positive shell thickness II. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] like Figures 1 to 3 As shown in the figure, this embodiment provides a method for zero-point positioning of the workpiece coordinate system during the machining of a box-shaped part casting blank, including the following steps:

[0044] S1. Use the calibration assembly (T-slot and standard block on the work platform) and alignment tools (such as dial indicator and micrometer) on the work platform to initially locate the zero point of the coordinate system of the first box part casting blank.

[0045] S2. Use vernier calipers to caliper and position the zero point of the coordinate system of the first box-shaped casting blank.

[0046] S3. Precision machining of the first box-type part casting blank;

[0047] S4. Subsequent parts are positioned and machined using the coordinate system of the first box-shaped casting blank.

[0048] in:

[0049] Step S1 specifically includes:

[0050] S11. Place the first box-shaped casting blank on the milling machine work platform and use the correction assembly on the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece (X positive outer surface 4 and Y negative outer surface 2).

[0051] S12. Rough mill the positive Z plane, remove 3 / 4 of the machining allowance, and obtain the initial finishing surface in the Z direction. This surface z0 is the zero point of the Z direction of the workpiece coordinate system.

[0052] S13. Using a dial indicator, measure and straighten two points A and B near the two ends of the negative Y-direction outer surface 2 (points A and B are respectively located at 1 / 10 of the end face of the negative Y-direction outer surface 2) to obtain a reference straight line for the negative Y-direction outer surface 2; using a dial indicator, measure and straighten two points C and D near the two ends of the positive Y-direction outer surface 4 (points C and D are respectively located at 1 / 10 of the end face of the positive Y-direction outer surface 4) to obtain a reference straight line for the positive Y-direction outer surface 4; use the two straight lines to obtain the initial zero position y0 in the Y direction;

[0053] S14. Using the same method as above, obtain the initial zero position x0 in the X direction. At this time, the initial zero point of the workpiece coordinate system (x0, y0, z0) is obtained.

[0054] Step S2 specifically includes:

[0055] S21. Use vernier calipers to measure the two thicknesses t1 and t2 of the Y-direction shell near both ends, and use vernier calipers to measure the two thicknesses t3 and t4 of the Y-direction shell near both ends. Use the four thickness dimensions to correct the Y-direction zero point and obtain the Y-direction correction zero point y1.

[0056] S22. Obtain the y-axis correction zero position y0 using the same method described above;

[0057] S23. At this point, the zero point of the workpiece coordinate system (x1, y1, z0) is obtained. The positive Z-plane is finished to obtain the zero point of the corrected workpiece coordinate system (x1, y1, z1).

[0058] Step S3 specifically includes:

[0059] S31. Use the calibration assembly to calibrate the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the inner surfaces 5, 6, 7, and 8.

[0060] S32. Use the calibration assembly to calibrate the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the outer surfaces 1, 2, 3, and 4.

[0061] S33. Use the calibration assembly to calibrate the zero point (x1, y1, z1) of the coordinate system of the casting blank of the box part and finish the remaining dimensions.

[0062] Step S4 specifically includes:

[0063] S41. Place the second box-shaped part casting blank on the milling machine work platform, and use the T-slot and standard block of the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece.

[0064] S42. Rough mill the positive Z plane, remove 3 / 4 of the machining allowance, and obtain the initial finishing surface in the Z direction. This surface z2 is the zero point of the Z direction coordinate system of the second box part.

[0065] S43. Use the coordinate zero point (x1, y1, z1) of the first piece of the calibration workpiece as the coordinate zero point (x2, y2, z2) of the second piece of the box-shaped part casting blank workpiece.

[0066] S44. The zero point of the workpiece coordinate system is corrected by using the method of zero point correction and positioning of the first box part casting blank workpiece coordinate system, and the zero point (x3, y3, z3) of the second box part casting blank workpiece coordinate system is corrected.

[0067] S45. Use the casting blank of the second box part to correct the zero point (x3, y3, z3) of the workpiece coordinate system, and finish machine the remaining dimensions;

[0068] S46. Repeat steps S41 to S45 to complete the coordinate system zero-point positioning and machining of the subsequent box-shaped parts casting blanks.

[0069] This invention is easy to operate, eliminating the need for clamping and alignment tools for each part; measurement is simple, requiring only common measuring tools to meet requirements; it reduces labor intensity and can effectively alleviate occupational diseases; each part is equivalent to two calibrations, with the positioning and centering of the part being directly confirmed during measurement; it has short auxiliary time and high processing accuracy.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for zero-point positioning of the workpiece coordinate system during the machining of a casting blank for a box-shaped part, characterized in that, Includes the following steps: S1. Use the calibration assembly and alignment tool on the work platform to initially locate the zero point of the coordinate system of the first box part casting blank. S2. Use vernier calipers to caliper and position the zero point of the coordinate system of the first box-shaped casting blank. S3. Precision machining of the first box-type part casting blank; S4. Subsequent parts are positioned and machined using the coordinate system zero point of the first box part casting blank. The calibration assembly includes a T-slot and a standard block, and the alignment tools include a dial indicator or a micrometer. Step S1 specifically includes: S11. Place the first box-shaped part casting blank on the milling machine work platform and use the T-slot and standard block on the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece. S12. Rough mill the positive Z-axis plane, remove 3 / 4 of the machining allowance, and obtain the initial finishing surface in the Z-axis. This surface z0 is the zero point of the Z-axis coordinate system of the workpiece. S13. Use a dial indicator to measure and straighten two points near the two ends of the negative Y-axis outer surface to obtain a reference straight line for the negative Y-axis outer surface; use a dial indicator to measure and straighten two points near the two ends of the positive Y-axis outer surface to obtain a reference straight line for the positive Y-axis outer surface; use the two straight lines to obtain the initial zero position y0 in the Y-axis direction. S14. Using the same method as above, obtain the initial zero position x0 in the X direction. At this time, the initial workpiece coordinate system zero point (x0, y0, z0) is obtained.

2. The method for zero-point positioning of the workpiece coordinate system during the machining of a box-shaped part casting blank according to claim 1, characterized in that, Step S2 specifically includes: S21. Use vernier calipers to measure the two thicknesses of the shell near the two ends in the negative Y direction, and use vernier calipers to measure the two thicknesses of the shell near the two ends in the positive Y direction. Use the four thickness dimensions to correct the zero point in the Y direction and obtain the zero point y1 in the Y direction. S22. Obtain the y-axis correction zero position y0 using the same method described above; S23. At this point, the zero point of the workpiece coordinate system (x1, y1, z0) is obtained. The positive Z-plane is finished to obtain the zero point of the corrected workpiece coordinate system (x1, y1, z1).

3. The method for zero-point positioning of the workpiece coordinate system during the machining of a box-shaped part casting blank according to claim 1, characterized in that, Step S3 specifically includes: S31. Use the calibration assembly to correct the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the inner surface. S32. Use the calibration assembly to correct the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the outer surface. S33. Use the calibration assembly to calibrate the coordinate system zero point (x1, y1, z1) of the casting blank workpiece of the box part and finish the remaining dimensions.

4. The method for zero-point positioning of the workpiece coordinate system during the machining of a box-shaped part casting blank according to claim 1, characterized in that, Step S4 specifically includes: S41. Place the second box-shaped part casting blank on the milling machine work platform, and use the T-slot and standard block of the work platform to perform preliminary positioning on the two adjacent outer surfaces of the workpiece. S42. Rough mill the positive Z plane, remove 3 / 4 of the machining allowance to obtain the initial finishing surface in the Z direction. This surface z2 is the zero point of the Z direction coordinate system of the second box part. S43. Use the coordinate zero point (x1, y1, z1) of the first piece to correct the workpiece coordinate system as the coordinate zero point (x2, y2, z2) of the second piece box part casting blank workpiece. S44. The zero point of the workpiece coordinate system is corrected by using the method of zero point correction and positioning of the first box part casting blank, and the zero point of the workpiece coordinate system (x3, y3, z3) of the second box part casting blank is obtained. S45. Use the casting blank of the second box part to correct the zero point of the workpiece coordinate system (x3, y3, z3), and finish machine the remaining dimensions. S46. Repeat steps S41 to S45 to complete the coordinate system zero-point positioning and machining of the subsequent box-shaped parts casting blanks.

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