A marking detection method for large precision casting rotary casing parts

Abstract

A method for detecting the marking of large precision-cast rotary casing parts belongs to the technical field of detecting large precision-cast rotary casing parts, and includes the following steps: Step 1, detecting the marking of the axial dimension of the parts; Step 2, detecting the marking of the angular dimension of the parts; Step 3, detecting the marking of the radial dimension of the parts: using a multi-purpose marking needle and a horizontal rotary table to mark the radial dimension of the parts; using a digital height gauge to detect the radial dimension of the parts. The method solves the problems of high technical requirements for operators, complex operations, large workload for dimensional calculation, and long operator training cycle in traditional methods for detecting the marking of large precision-cast rotary casing parts. The method realizes the standardized operation of the marking detection process of large precision-cast rotary casing parts, shortens the operator training cycle, and quickly improves the processing capacity of the marking detection process of large precision-cast rotary casing parts of aircraft engines.

Description

Technical Field

[0001] The invention belongs to the technical field of large-scale precision-cast rotary casing parts detection, and in particular relates to a marking detection method for large-scale precision-cast rotary casing parts. Background Art

[0002] Large precision-cast rotating casing parts for aircraft engines have complex shapes, multiple sizes, high value, and long processing cycles. Scribing inspection methods are often used to inspect and evaluate parts. The scribing inspection process plays an important role in adjusting the casting state, discovering casting size problems, and performing casting datum conversion.

[0003] Due to the problems of traditional marking inspection methods for large precision-cast rotating casing parts, such as high technical requirements for operators, relatively complicated operation process, heavy workload for dimensional calculation, and long training time for operators, it is difficult to pass on the marking inspection techniques for large and complex precision-cast casing parts of aircraft engines. The number of experienced operators is gradually decreasing, and the marking inspection process is gradually becoming a bottleneck process. Summary of the invention

[0004] The purpose of the present invention is to provide a marking detection method for large-scale precision casting rotary casing parts, which solves the problems of traditional marking detection methods for large-scale precision casting rotary casing parts, such as high technical requirements for operators, complex operations, large workload for dimensional calculations, and slow operator training. By effectively inheriting the marking detection technique, operators can be quickly trained, and the processing capacity of the marking detection process for large-scale precision casting rotary casing parts of aircraft engines can be effectively improved.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A method for detecting the marking of large precision-cast rotary casing parts comprises the following steps:

[0007] Step 1: Detection of axial dimension of parts

[0008] Step 1.1, establish the workpiece axial coordinate system: establish the workpiece axial coordinate system with the part axial process reference as the zero point;

[0009] Step 1.2, establish the platform axial coordinate system: establish the platform axial coordinate system with the upper surface of the platform as the zero point;

[0010] Step 1.3, determine the offset data between the workpiece zero point and the platform zero point;

[0011] Step 1.4, prepare an axial dimension calculation and operation table, input the zero point offset data into the table, use Excel to convert the workpiece coordinate system with the part axial process reference as the zero point into the platform axial coordinate system with the upper surface of the platform as the zero point, calculate the axial dimension based on the platform axial coordinate system and generate the marking data;

[0012] Step 1.5, print the electronic form and perform the line inspection process according to the order of the form;

[0013] Step 1.6, input the axial dimension detection data into the calculation and operation table, and use the Excel table to calculate and evaluate the axial dimension data;

[0014] Step 1.7, on the surface of the platform, the workpiece is inspected by combining scribing and table inspection;

[0015] Step 2: Angular dimension marking inspection of parts

[0016] Step 2.1, use a horizontal rotary table to clamp the parts and perform angular indexing;

[0017] Step 2.2, determine the distance between the center of the horizontal rotary table and the upper surface of the platform;

[0018] Step 2.3, determine the angular zero point C0 of the part;

[0019] Step 2.4, establish the platform axial coordinate system;

[0020] Step 2.5, prepare an angular dimension calculation table and operation table, and use Excel to calculate the angular dimension;

[0021] Step 2.6, manual indexing

[0022] According to the angular dimension calculation and the angular data in the operation table, turn the handwheel clockwise to rotate the horizontal rotary table clockwise, and determine the angular position of the part by the ruler and cursor on the handwheel;

[0023] Step 2.7, manual marking

[0024] Use a height gauge or a marking disc to mark and measure the angular dimensions based on the platform;

[0025] Step 3: Part radial dimension marking inspection

[0026] Use a multi-purpose marking needle and a horizontal rotary table to mark the radial dimensions of parts; use a digital height gauge to detect the radial dimensions of parts.

[0027] Step 1.4, prepare an axial dimension calculation and operation table, enter the zero point offset data into the table, use Excel to convert the workpiece coordinate system with the part axial process reference as the zero point into the platform axial coordinate system with the upper surface of the platform as the zero point, calculate the axial dimension based on the platform axial coordinate system and generate the marking data, specifically:

[0028] Before starting the work on the parts, use Excel to prepare an axial dimension calculation and operation table. According to the axial dimension relationship of the processed parts and the platform axial coordinate system, prepare the part axial dimension calculation and operation table. The axial dimension calculation and operation table can automatically convert the axial dimension of the drawing into the axial dimension of the platform axial coordinate system, and can realize the automatic calculation of the marking data, which reduces the workload of data calculation and improves the accuracy and speed of data calculation.

[0029] Set the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 Enter the offset data between the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between the two is input into the reference position of the axial dimension calculation and operation table. The spreadsheet will take the upper surface of the platform as the zero point Z0. 平台 , automatically calculate the platform axial coordinate values ​​of all axial dimensions;

[0030] When performing axial dimension marking inspection on parts of the same model but different serial numbers, only the zero point Z0 of the workpiece coordinate system needs to be entered. 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between them can automatically calculate the platform axial coordinate values ​​of all axial dimensions.

[0031] Step 2.1: Use a horizontal rotary table to clamp parts and perform angular indexing, specifically:

[0032] A horizontal rotary table is used for indexing, a three-jaw self-centering chuck is installed on the indexing rotary table for clamping parts, and the horizontal rotary table and the three-jaw self-centering chuck are connected through an extended connecting seat;

[0033] Using the existing platform as a foundation, a square box is installed on one side of the length direction of the upper surface of the platform, and a horizontal rotary table is installed on the upper part of the square box;

[0034] During operation, install the parts on the three-jaw self-centering chuck, use the three-jaw chuck jaws to expand the clamping hole at one end of the parts, and use the horizontal rotary table for indexing. When the marking part is parallel to the upper surface of the platform, use the upper surface of the platform as the reference plane, and use a height gauge or a marking disk to mark and detect the angular dimensions;

[0035] Step 2.5, prepare the angular dimension calculation table and operation table, and use Excel table to calculate the angular dimension, specifically:

[0036] Before starting the work on the parts, use Excel to prepare the angular dimension calculation and operation table. According to the angular dimension relationship of the processed parts, the angular dimension calculation and operation table of the parts is prepared. After the obtained angular zero point C0 and angular spacing data are imported into the angular dimension calculation and operation table, the angular dimension calculation and operation table can automatically calculate the angular data of each angular position.

[0037] The technical effects of the present invention are:

[0038] This processing method combines the marking detection with the table detection, and the detection results are more intuitive and reliable. The dimension calculation and operation table with automatic calculation function is compiled using Excel tables to realize the automatic calculation and evaluation of the marking data, which reduces the workload of data calculation and improves the accuracy of data calculation. By applying the dimension calculation and operation table to establish a unified technical standard, the standardized operation of the marking detection process of large precision casting rotary casing parts and the rapid promotion of the processing method can be realized.

[0039] This processing method is simple to operate and has obvious application effects. It can effectively solve the problems of traditional marking inspection, such as high skill level requirements for operators, lack of unified technical standards, difficulty in promoting operating techniques, and large workload for dimensional calculation. It can achieve rapid improvement in the marking inspection and processing capabilities of large precision-cast rotary casing parts, and has extremely broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a large precision casting rotary casing of the present invention, Figure 1 a. Figure 1 b. Figure 1 Figure c and Figure d are schematic diagrams of four viewing angles of a large precision-cast rotary casing;

[0041] Figure 2 Schematic diagram of the axial dimension calculation and operation table calculation function status of the present invention;

[0042] Figure 3 Schematic diagram of the axial dimension calculation and operation table evaluation function status of the present invention;

[0043] Figure 4 Angular dimension calculation table and operation diagram of the present invention;

[0044] Figure 5 Schematic diagram of the horizontal rotary table of the present invention;

[0045] Figure 6 The working state of the horizontal rotary table of the present invention;

[0046] Figure 7 The distance L1 between the center of the horizontal rotary table of the present invention and the upper surface of the table;

[0047] 1-Three-jaw self-centering chuck, 2-Extended connecting seat, 3-Platform, 4-Square box, 5-Horizontal rotary table. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0049] A method for detecting the marking of large precision-cast rotary casing parts comprises the following steps:

[0050] The structure of large precision casting rotary casing parts is relatively complex. After sorting out, the dimensions of the marking inspection can be divided into three categories, namely axial dimension, radial dimension and angular dimension. The marking inspection of large precision casting rotary casing parts is divided into two parts: marking the axial dimension on the ordinary platform, installing a horizontal rotary table on the ordinary platform and marking the angular and radial dimensions of the parts with a multi-purpose marking needle. Figure 1 As shown;

[0051] Step 1: Detection of axial dimension of parts

[0052] Step 1.1, establish the workpiece axial coordinate system:

[0053] On the basis of careful analysis of the part drawings, the workpiece axial coordinate system is established with the part axial process reference as the zero point. The workpiece coordinate system truly reflects the dimensional relationship of the part and is the basis for calculating the part axial marking test data.

[0054] Step 1.2, establish the platform axial coordinate system:

[0055] Establish the platform axial coordinate system with the upper surface of the platform as the zero point;

[0056] Step 1.3, determine the offset data between the workpiece zero point and the platform zero point:

[0057] Use a digital height gauge to determine the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between the workpiece coordinate system zero point Z0 工件 Transform to the upper surface of the platform as the zero point Z0 平台 In the established platform axial coordinate system;

[0058] Step 1.4, prepare an axial dimension calculation and operation table, enter the zero point offset data into the table, use Excel to convert the workpiece coordinate system with the part axial process reference as the zero point into the platform axial coordinate system with the upper surface of the platform as the zero point, calculate the axial dimension based on the platform axial coordinate system and generate the marking data:

[0059] Before starting the work on the parts, use Excel to prepare an axial dimension calculation and operation table. According to the axial dimension relationship of the processed parts and the platform axial coordinate system, prepare the part axial dimension calculation and operation table. The axial dimension calculation and operation table can automatically convert the axial dimension of the drawing into the axial dimension of the platform axial coordinate system, and can realize the automatic calculation of the marking data, reducing the workload of data calculation and improving the accuracy and speed of data calculation.

[0060] Set the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 Enter the offset data between the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between the two is input into the reference position of the axial dimension calculation and operation table. The spreadsheet will take the upper surface of the platform as the zero point Z0. 平台 , automatically calculate the platform axial coordinate values ​​of all axial dimensions;

[0061] When performing axial dimension marking inspection on parts of the same model but different serial numbers, only the zero point Z0 of the workpiece coordinate system needs to be entered. 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between them can automatically calculate the platform axial coordinate values ​​of all axial dimensions, such as Figure 2 As shown;

[0062] Step 1.5, Print the spreadsheet:

[0063] Print out the electronic form, and the operator performs the marking inspection process according to the order of the axial dimension calculation and operation table; the standard values ​​of the axial dimension calculation and operation table are used as the marking data;

[0064] Step 1.6, evaluate the axial dimension data using the axial dimension calculation and operation table:

[0065] After the platform axial coordinate data of the part is entered into the spreadsheet, the spreadsheet will automatically calculate the maximum value, minimum value, maximum margin, and minimum margin of the detected dimension, such as Figure 3 As shown;

[0066] Step 1.7, detection method:

[0067] The detection method combining scribing and table detection is adopted to realize the combination of traditional scribing evaluation and coordinate evaluation methods, so that the rough evaluation of the raw material based on scribing is transformed into a numerical evaluation based on coordinate values, making the detection result more intuitive and reliable, and the detection data can be directly compared with the part model;

[0068] Step 2: Angular dimension marking detection of parts:

[0069] Step 2.1: Use a horizontal rotary table to clamp parts and perform angular indexing

[0070] Use a horizontal rotary table for indexing, install a three-jaw self-centering chuck 1 on the indexing rotary table for clamping parts, and connect the horizontal rotary table and the three-jaw self-centering chuck 1 through an extended connecting seat 2; use the existing platform 3 as a basis, install a 500mm high square box 4 on one side of the length direction of the upper surface of the platform 3, and install a horizontal rotary table 5 on the upper part of the square box 4; when working, install the parts on the three-jaw self-centering chuck 1, use the three-jaw self-centering chuck 1 jaws to expand the clamping hole at one end of the part, use the horizontal rotary table for indexing, and when the marking part is parallel to the upper surface of the platform 3, use the upper surface of the platform 3 as a reference plane, and use a height gauge or a marking disk to mark and detect the angular dimensions, such as Figure 5 and Figure 6 As shown;

[0071] Step 2.2, determine the distance between the center of the horizontal rotary table 5 and the upper surface of the platform 3

[0072] Use a digital height gauge to measure the distance L1 from the rotation center of the horizontal rotary table 5 to the upper surface of the platform 3, as shown in Figure 7 As shown;

[0073] Step 2.3, determine the part angular zero point C0:

[0074] According to the requirements of the process documents, use a digital height gauge to determine the angular zero point C0 position. The C0 position can be determined by a reference line, reference surface or reference hole. Use a 0-1000 digital height gauge to calculate the distance L1 between the rotation center of the horizontal rotary table 5 and the upper surface of the platform 3, and use the hand wheel of the horizontal rotary table 5 to adjust it;

[0075] Step 2.4, establish the platform axial coordinate system:

[0076] Based on the careful analysis of the part drawings, determine the angular dimension relationship of the workpiece and convert the angular dimension of the workpiece into the axial coordinate value of the platform axial coordinate system;

[0077] Step 2.5, prepare the angular dimension calculation table and operation table, and use Excel table to calculate the angular dimension:

[0078] Before starting the work on the parts, use Excel to prepare an angular dimension calculation and operation table. According to the angular dimension relationship of the processed parts, prepare the angular dimension calculation and operation table for the parts. After importing the obtained angular zero point C0 and angular spacing data into the angular dimension calculation and operation table, the angular dimension calculation and operation table can automatically calculate the angular data of each angular position, such as Figure 4 As shown;

[0079] Step 2.6, manual indexing:

[0080] According to the angular dimension calculation and the angular data calculated in the operation table, use the hand wheel of the horizontal rotary table 5 to adjust the angle of the table, turn the hand wheel clockwise to make the horizontal rotary table 5 rotate clockwise, and determine the angular position of the part by the ruler and cursor on the hand wheel;

[0081] Step 2.7, manual marking:

[0082] Use a height gauge or a marking disc to mark and measure the angular dimensions with platform 3 as the reference;

[0083] Step 3: Part radial dimension marking detection:

[0084] Use a multi-purpose marking needle and a horizontal rotary table 5 to mark the radial dimensions of the parts; use a digital height gauge to detect the radial dimensions of the parts.

Claims

1. A method for detecting the marking of large precision-cast rotary casing parts, characterized in that: The following steps are involved: Step 1: axial dimension marking inspection of parts; Step 2: Angular dimension marking detection of parts; Step 3: Detection of radial dimension of parts; Use a multi-purpose marking needle and a horizontal rotary table to mark the radial dimensions of parts; use a digital height gauge to detect the radial dimensions of parts; The part angular dimension marking detection includes the following steps: Step 2.1, use a horizontal rotary table to clamp the parts and perform angular indexing; Step 2.2, determine the distance between the center of the horizontal rotary table and the upper surface of the platform; Step 2.3, determine the angular zero point C0 of the part; Step 2.4, establish the platform axial coordinate system; Step 2.5, prepare an angular dimension calculation table and operation table, and use Excel to calculate the angular dimension; Step 2.6, manual indexing According to the angular dimension calculation and the angular data in the operation table, turn the handwheel clockwise to rotate the horizontal rotary table clockwise, and determine the angular position of the part by the ruler and cursor on the handwheel; Step 2.7, manual marking Use a height gauge or a marking disc to mark and measure the angular dimensions based on the platform; Step 2.1: Use a horizontal rotary table to clamp parts and perform angular indexing, specifically: A horizontal rotary table is used for indexing, a three-jaw self-centering chuck is installed on the indexing rotary table for clamping parts, and the horizontal rotary table and the three-jaw self-centering chuck are connected through an extended connecting seat; Using the existing platform as a foundation, a square box is installed on one side of the length direction of the upper surface of the platform, and a horizontal rotary table is installed on the upper part of the square box; When working, install the part on the three-jaw self-centering chuck, use the three-jaw chuck jaws to expand the clamping hole at one end of the part, and use the horizontal rotary table for indexing. When the marked part is parallel to the upper surface of the platform, use the upper surface of the platform as the reference plane, and use a height gauge or marking disk to mark and detect the angular dimensions.

2. A method for detecting the marking of large precision-cast rotary casing parts according to claim 1, characterized in that: The part axial dimension marking detection includes the following steps: Step 1.1, establish the workpiece axial coordinate system: establish the workpiece axial coordinate system with the process reference of the part axial direction as the zero point; Step 1.2, establish the platform axial coordinate system: establish the platform axial coordinate system with the upper surface of the platform as the zero point; Step 1.3, determine the offset data between the workpiece zero point and the platform zero point; Step 1.4, prepare an axial dimension calculation and operation table, input the zero point offset data into the table, use Excel to convert the workpiece coordinate system with the part axial process reference as the zero point into the platform axial coordinate system with the upper surface of the platform as the zero point, calculate the axial dimension based on the platform axial coordinate system and generate the marking data calculation; Step 1.5, print the electronic form and perform the line inspection process according to the order of the form; Step 1.6, input the axial dimension detection data into the calculation and operation table, and use the Excel table to calculate and evaluate the axial dimension data; Step 1.7, on the upper surface of the platform, the workpiece is inspected by combining scribing and table inspection.

3. A method for detecting the marking of large precision-cast rotary casing parts according to claim 2, characterized in that: Step 1.4, prepare an axial dimension calculation and operation table, enter the zero point offset data into the table, use Excel to convert the workpiece coordinate system with the part axial process reference as the zero point into the platform axial coordinate system with the upper surface of the platform as the zero point, calculate the axial dimension based on the platform axial coordinate system and generate the marking data, specifically: Before starting the work on the parts, use Excel to prepare an axial dimension calculation and operation table. According to the axial dimension relationship of the processed parts and the platform axial coordinate system, prepare the part axial dimension calculation and operation table. The axial dimension calculation and operation table can automatically convert the axial dimension of the drawing into the axial dimension of the platform axial coordinate system, and can realize the automatic calculation of the marking data, which reduces the workload of data calculation and improves the accuracy and speed of data calculation. Set the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 Enter the offset data between the workpiece coordinate system zero point Z0 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between the two is input into the reference position of the axial dimension calculation and operation table. The spreadsheet will take the upper surface of the platform as the zero point Z0. 平台 , automatically calculate the platform axial coordinate values ​​of all axial dimensions; When performing axial dimension marking inspection on parts of the same model but different serial numbers, only the zero point Z0 of the workpiece coordinate system needs to be entered. 工件 and the zero point Z0 of the platform axial coordinate system 平台 The offset data between them can automatically calculate the platform axial coordinate values ​​of all axial dimensions.

4. A method for detecting the marking of large precision-cast rotary casing parts according to claim 1, characterized in that: Step 2.5, prepare the angular dimension calculation table and operation table, and use Excel table to calculate the angular dimension, specifically: Before starting work on the parts, use Excel to prepare an angular dimension calculation and operation table. According to the angular dimension relationship of the processed parts, prepare the part angular dimension calculation and operation table. After importing the obtained angular zero point C0 and angular spacing data into the angular dimension calculation and operation table, the angular dimension calculation and operation table can automatically calculate the angular data of each angular position.

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