Casting alignment machining method

Abstract

The invention provides a casting alignment machining method, and relates to the technical field of casting machining, three reference balls are adhered to a casting, the reference balls and the casting are integrated, the casting with the reference balls is scanned, alignment, tool setting and establishment of a machining coordinate system are achieved in cooperation with a clamping device according to the numerical value of the scanning result, and the machining coordinate system is obtained. The whole method is high in inspection precision and short in inspection time, inspection blind areas are effectively reduced, a traditional scribing procedure is omitted, time and cost are saved, the operation difficulty of manual adjustment is reduced, production efficiency is improved, and the method is suitable for large-scale production. The technical problems that in the prior art, the casting curved surface inspection precision is low, the machining error is large, the clamping and alignment time is long, and the machining efficiency is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of casting processing, and particularly to a method for aligning and processing castings. Background Art

[0002] With the development of society and the progress of technology, the precision requirements for precision casting products are getting higher and higher. Generally, the dimensional tolerance should meet CT5-CT8 levels in HB6103-2004. Especially for castings with complex curved surfaces on the surface, the curved surfaces are generally non-machined surfaces, with high requirements for surface profile, and also high requirements for the surface profile relative to the machined surface after processing. The surface profile of the curved surface of the casting is usually detected by a three-dimensional scanning method. During processing, it often occurs that the surface profile of the non-machined curved surface is qualified before processing.

[0003] The existing method usually uses a template to compare and inspect the curved surface of the casting, confirm whether the casting size is qualified, draw lines on the casting surface, and process the casting according to the returned dimensions based on the lines.

[0004] However, using a template to inspect the curved surface of the casting has low inspection accuracy, long inspection time, and blind spots that cannot be detected; processing the casting according to the lines has large errors, long clamping and alignment time, and affects the processing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for aligning and processing castings, so as to alleviate the technical problems existing in the prior art, such as low inspection accuracy of the curved surface of the casting, large processing errors, long clamping and alignment time, and affecting the processing efficiency.

[0006] The method for aligning and processing castings provided by the present invention includes the following steps:

[0007] Machine out three reference balls and bond the reference balls to the casting;

[0008] Scan the casting with the reference balls, fit the scanned data with the theoretical digital model, and calculate the diameter size and the center coordinate data of the reference balls;

[0009] Install the casting with the reference balls on the clamping device;

[0010] Adjust the position of the casting with the reference balls through the clamping device, align the reference balls, and establish a machining coordinate system based on the reference balls;

[0011] Machine the casting according to the established machining coordinate system;

[0012] Perform blue light scanning on the machined casting.

[0013] In an alternative embodiment,

[0014] The reference sphere includes a spherical part and a base connection part;

[0015] The spherical part is connected to the base connection part, and the base connection part is used to be fixed on the casting.

[0016] In an alternative embodiment,

[0017] Scanning the casting with a reference sphere, fitting the scanned data with a theoretical digital model, and calculating the diameter dimension and the spherical center coordinate data of the reference sphere include the following steps:

[0018] Using a non-contact optical scanner to scan the casting with a reference sphere to obtain 3D point cloud data, and using 3D data processing software to fit the 3D point cloud data with the theoretical digital model to make the size of the casting with the reference sphere reach a qualified state;

[0019] Calculating the diameter dimension and the spherical center coordinate data of the reference sphere through 3D data processing software.

[0020] In an alternative embodiment,

[0021] The clamping device includes a machine tool workbench, a rotary workbench, a first clamping component, a second clamping component, and a third clamping component;

[0022] The rotary workbench is installed on the machine tool workbench, the first clamping component, the second clamping component, and the third clamping component are all arranged on the rotary workbench, and the rotary workbench is configured to be able to rotate around the Z direction;

[0023] The first clamping component, the second clamping component, and the third clamping component are all used to clamp and fix the casting;

[0024] The first clamping component includes a driving pressure plate and a driving support;

[0025] The driving support is used to support the casting;

[0026] The driving pressure plate is used to press the casting;

[0027] Both the driving support and the driving pressure plate are configured to be able to move along the Z direction.

[0028] In an alternative embodiment,

[0029] Installing the casting with a reference sphere on the clamping device includes the following steps:

[0030] Placing three driving supports and three driving pressure plates on the rotary workbench, and leveling the contact surface between the upper end of the driving support and the casting;

[0031] Place the casting on the drive support and adjust a straight edge of the bottom flange of the casting parallel to the X-axis of the machine tool.

[0032] In an alternative embodiment,

[0033] The method of adjusting the position of the casting with the reference ball by the clamping device, aligning the reference ball, and establishing a machining coordinate system according to the reference ball comprises the following steps:

[0034] Steps to find the positive Z direction:

[0035] Use the finder to find the highest points of the three reference balls in the Z-axis direction respectively;

[0036] Adjust the driving support to move in the Z direction so that the measured values ​​of the highest points of the three reference balls in the Z direction are consistent with the calculated coordinate data of the sphere center;

[0037] Press the casting by driving the pressure plate;

[0038] Re-measure and confirm that the actual measured values ​​of the highest points in the Z direction of the three reference spheres are consistent with the calculated sphere center coordinate data.

[0039] In an alternative embodiment,

[0040] The method of adjusting the position of the casting with the reference ball by the clamping device, aligning the reference ball, and establishing a machining coordinate system according to the reference ball also includes the following steps:

[0041] Steps to find the positive Y direction:

[0042] Use the finder to find the highest points of two reference balls in the Y-axis direction respectively;

[0043] By rotating the worktable, the actual measured values ​​of the highest points in the Y direction of the two reference spheres are made consistent with the calculated sphere center coordinate data.

[0044] In an alternative embodiment,

[0045] The method of adjusting the position of the casting with the reference ball by the clamping device, aligning the reference ball, and establishing a machining coordinate system according to the reference ball also includes the following steps:

[0046] Establish the machining coordinate system based on the reference sphere:

[0047] Use the finder to find the highest point of one of the reference balls in the Z direction, move along the negative Z direction by |Z1|+D1 / 2+the radius of the photoelectric edge finder ball head, and return the Z axis of the machine tool to zero;

[0048] Move along the positive Y direction by |Y1|+D1 / 2+radius value of the photoelectric edge finder ball head, and the X axis of the machine tool returns to zero;

[0049] Use an aligner to find the highest point on the X - side of one of the reference balls, move along the positive X - direction by |X1|+D1 / 2 + the radius value of the ball head of the optical edge finder, and zero the Y - axis of the machine tool.

[0050] In an alternative embodiment,

[0051] The machining of the casting according to the established machining coordinate system includes the following steps:

[0052] Machine the circular flange end:

[0053] Mill the end face of the circular flange, drill the bolt holes at the circular flange end, and drill and ream the positioning pin holes at the circular flange end;

[0054] Machine the square flange end:

[0055] Place the positioning plate on the machine tool workbench, use a dial indicator to straighten the side of the positioning plate, and tighten the positioning fixing bolts onto the positioning plate; place the casting on the positioning plate, insert the positioning pins through the positioning pin holes at the circular flange end into the positioning plate, and tighten the circular flange end fixing bolts through the bolt holes at the circular flange end onto the positioning plate; align and establish the machining coordinate system with the positioning plate as the reference; mill the end face of the square flange; drill the bolt holes at the square flange end; drill and ream the positioning pin holes at the square flange end.

[0056] In an alternative embodiment,

[0057] The blue - light scanning of the machined casting includes the following steps:

[0058] Perform blue - light scanning on the machined casting to generate scanning data. Align through the machined end face of the circular flange and two positioning pin holes at the circular flange end, compare the scanning data with the theoretical digital model, and confirm that the surface profile of the non - machined surface of the casting is qualified.

[0059] The casting alignment and machining method provided by the present invention bonds three reference balls to the casting to make the reference balls and the casting an integral whole, scans the casting with the reference balls, and according to the scanned result values, realizes alignment, tool setting, and establishment of the machining coordinate system in cooperation with the clamping device. Subsequently, the casting is machined according to the machining coordinate system. Finally, blue - light scanning is performed on the machined casting to confirm that the surface profile of the non - machined surface of the casting is qualified. The overall method has high inspection accuracy, short inspection time, effectively reduces the inspection blind area, eliminates the traditional scribing process, saves time and cost, reduces the operation difficulty of manual adjustment, improves production efficiency, and alleviates the technical problems in the prior art such as low inspection accuracy of the casting curved surface, large machining errors, long clamping and alignment time, and affecting machining efficiency. Brief Description of the Drawings

[0060] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0061] Figure 1 Structural schematic diagram of a casting with a reference sphere provided by an embodiment of the present invention;

[0062] Figure 2 Structural schematic diagram of a clamping device provided by an embodiment of the present invention;

[0063] Figure 3 Structural schematic diagram of the step of aligning the Z direction provided by an embodiment of the present invention;

[0064] Figure 4 Structural schematic diagram of the step of aligning the Y direction provided by an embodiment of the present invention;

[0065] Figure 5 Structural schematic diagram of the step of aligning the X direction provided by an embodiment of the present invention;

[0066] Figure 6 Structural schematic diagram of the clamping structure for machining the flange end provided by an embodiment of the present invention;

[0067] Figure 7 Structural schematic diagram of the reference sphere provided by an embodiment of the present invention.

[0068] Icon: 10 - casting; 11 - reference sphere; 111 - spherical part; 112 - base connection part; 110 - machine tool workbench; 120 - rotary workbench; 130 - first clamping assembly; 131 - driving pressing plate; 132 - driving support; 140 - second clamping assembly; 150 - third clamping assembly; 160 - aligner; 170 - positioning plate; 181 - positioning fixing bolt; 182 - circular flange end fixing bolt; 190 - positioning pin. Specific Embodiments

[0069] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0070] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0071] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The following will describe in detail the specific embodiments of the present invention with reference to the drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0073] The method for aligning and machining a casting provided in this embodiment includes the following steps: machining three reference balls 11 and bonding the reference balls 11 to the casting 10; scanning the casting 10 with the reference balls 11, fitting the scanned data with the theoretical digital model, and calculating the diameter size and the center coordinate data of the reference balls 11; installing the casting 10 with the reference balls 11 on a clamping device; adjusting the position of the casting 10 with the reference balls 11 through the clamping device, aligning the reference balls 11, and establishing a machining coordinate system based on the reference balls 11; machining the casting 10 according to the established machining coordinate system; and performing blue light scanning on the machined casting 10.

[0074] The casting alignment machining method provided in this embodiment bonds three reference balls 11 to the casting 10, making the reference balls 11 and the casting 10 an integral whole. Then, scan the casting 10 with the reference balls 11, and according to the scanned result values, cooperate with the clamping device to achieve alignment, tool setting, and establish a machining coordinate system. Subsequently, machine the casting 10 according to the machining coordinate system. Finally, perform blue light scanning on the machined casting 10 to confirm that the surface profile of the non-machined surface of the casting 10 is qualified. The overall method has high inspection accuracy, short inspection time, effectively reduces inspection blind spots, eliminates the traditional scribing process, saves time and cost, reduces the operation difficulty of manual adjustment, improves production efficiency, and alleviates the technical problems existing in the prior art, such as low inspection accuracy of the casting 10 curved surface, large machining errors, and long clamping and alignment time, which affect the machining efficiency.

[0075] Regarding the step of "machining three reference balls 11 and bonding the reference balls 11 to the casting 10", it specifically includes:

[0076] As Figure 1 、 Figure 7 shown, machine three reference balls 11, and control the diameter tolerance of the reference balls 11 within the range of ±0.01 mm. Among them, the reference ball 11 includes a spherical part 111 and a base connection part 112; the spherical part 111 and the base connection part 112 are connected to each other. The spherical part 111 is spherical, and the base connection part 112 includes a connecting rod and a frustum. One end of the connecting rod is connected to the spherical part 111, and the other end of the connecting rod is connected to the frustum. Bond the base connection part 112 to the casting 10 to make the reference ball 11 and the casting 10 an integral whole.

[0077] Regarding "scanning the casting 10 with the reference balls 11, fitting the scanned data with the theoretical digital model, and calculating the diameter size and the ball center coordinate data of the reference ball 11", specifically:

[0078] Use a non-contact optical scanner to scan the casting 10 with the reference balls 11 to obtain 3D point cloud data; use three-dimensional data processing software to perform the best fit of the 3D point cloud data with the theoretical digital model; make the dimensions of the combined body reach a qualified state: the surface profile of the non-machined surface of the casting 10 meets the drawing requirements, and the machining allowance of the machined surface meets the machining requirements; calculate the diameter size and the ball center coordinate data of the reference ball 11 through the three-dimensional data processing software, as shown in the following table:

[0079]

[0080]

[0081] Table 1 Diameter and ball center coordinates of the reference ball 11

[0082] Regarding the clamping device in the step of "installing the casting 10 with the reference ball 11 on the clamping device", as Figure 2 shown, it specifically includes a machine tool workbench 110, a rotary workbench 120, a first clamping assembly 130, a second clamping assembly 140, and a third clamping assembly 150; the rotary workbench 120 is installed on the machine tool workbench 110, and the first clamping assembly 130, the second clamping assembly 140, and the third clamping assembly 150 are all arranged on the rotary workbench 120. The rotary workbench 120 can rotate around the Z axis. The first clamping assembly 130, the second clamping assembly 140, and the third clamping assembly 150 are all used to clamp and fix the casting 10. Through the setting of the rotary workbench 120, the first clamping assembly 130, the second clamping assembly 140, the third clamping assembly 150, and the casting 10 are driven to rotate around the Z axis.

[0083] The first clamping assembly 130, the second clamping assembly 140, and the third clamping assembly 150 have the same structure, only the installation positions are different. It is necessary to ensure that two adjacent clamping assemblies are arranged vertically. The first clamping assembly 130 specifically includes a driving pressure plate 131 and a driving support 132. The driving pressure plate 131 is used to press the casting 10; the driving pressure plate 131 is driven by a driving device to drive the driving pressure plate 131 to move up and down. The driving device can be set as a cylinder, a hydraulic cylinder, a motor, etc. Similarly, the driving support 132 is used to support the casting 10. The driving support 132 is driven by a driving device to drive the driving support 132 to move up and down. The driving device can be set as a cylinder, a hydraulic cylinder, a motor, etc. Both the driving support 132 and the driving pressure plate 131 are configured to be able to move along the Z axis.

[0084] Since the first clamping assembly 130, the second clamping assembly 140, and the third clamping assembly 150 have the same structure, the specific structures of the second clamping assembly 140 and the third clamping assembly 150 will not be described in detail.

[0085] Regarding the step of "installing the casting 10 with the reference ball 11 on the clamping device", it specifically includes:

[0086] Place three driving supports 132 and three driving pressure plates 131 on the rotary workbench 120, and level the contact surface between the upper end of the driving support 132 and the casting 10; place the casting 10 on the driving support 132, and adjust one straight edge of the bottom flange of the casting 10 to be parallel to the X axis of the machine tool.

[0087] Regarding the step of "adjusting the position of the casting 10 with the reference ball 11 through the clamping device, aligning the reference ball 11, and establishing a machining coordinate system based on the reference ball 11", it specifically includes the following steps:

[0088] As Figure 3As shown, the steps of Z-direction alignment are: use the aligner 160 to find the highest points of the three reference balls 11 in the axial direction respectively, wherein the aligner 160 is specifically configured as a photoelectric edge finder and a lever dial indicator. Preferably, the aligner 160 is specifically configured as a photoelectric edge finder; adjust the driving support 132 to move in the Z direction so that the actual measured values ​​of the highest points of the three reference balls 11 are consistent with the calculated sphere center coordinate data Z1, Z2, and Z3; press the casting 10 by driving the pressure plate 131; re-measure and confirm that the actual measured values ​​of the highest points of the three reference balls 11 are consistent with the calculated sphere center coordinate data Z1, Z2, and Z3.

[0089] like Figure 4 The Y-direction alignment step is as follows: use the aligner 160 to respectively find the highest points of two reference balls 11 in the Y-axis direction; and use the rotary table 120 to make the actual measured values ​​of the highest points of the two reference balls 11 consistent with the calculated spherical center coordinate data Y1 and Y2.

[0090] Establish a machining coordinate system based on the reference sphere 11: Use the aligner 160 to find the highest point of one of the reference spheres 11 on the side, move in the negative Z direction by |Z1|+D1 / 2+the radius of the photoelectric edge finder ball head, and return the machine tool Z axis to zero; move in the positive Y direction by |Y1|+D1 / 2+the radius of the photoelectric edge finder ball head, and return the machine tool X axis to zero.

[0091] like Figure 5 As shown, the aligner 160 is used to find the highest point of the X-direction side of one of the reference balls 11, and the ball head radius value of the photoelectric edge finder is moved along the positive X direction, and the Y axis of the machine tool is returned to zero.

[0092] Regarding “processing the casting 10 according to establishing a processing coordinate system”, the following steps are specifically included:

[0093] Machining round flange ends:

[0094] 1) Milling of flange end face: milling with φ20 end mill. Processing parameters: spindle speed 1500-1800r / min, cutting depth 0.05-0.2mm, feed rate 400-500mm / min. After processing, the flatness reaches 0.03mm and the roughness Ra3.2μm.

[0095] 2) Drilling round flange end bolt holes: Use φ2 center drill and φ8.5 twist drill. Processing parameters: spindle speed 1800-2000r / min, feed rate 0.08-0.12mm / r. After processing, the roundness reaches 0.1mm and the roughness Ra6.3μm.

[0096] 3) Drill and ream the 190 holes for the positioning pins at the round flange end: Use a φ2 center drill, a φ7.8 twist drill, and a φ8H8 reamer. Drilling parameters: spindle speed 2000 r / min, feed rate 0.1 mm / r; Reaming parameters: spindle speed 300 r / min, feed rate 0.1 mm / r. After machining, the diameter of the pin holes is φ8 - φ8.02 mm, and the surface roughness is Ra1.6 μm.

[0097] Machine the flange end:

[0098] 1) As Figure 6 shown, place the positioning plate 170 on the machine tool table 110, use a dial indicator to straighten the side of the positioning plate 170, and tighten the positioning fixing bolts 181 onto the positioning plate 170.

[0099] 2) As Figure 6 shown, place the casting 10 on the positioning plate 170, insert the positioning pin 190 through the 190 holes for the positioning pins at the round flange end and into the positioning plate 170, and tighten the round flange end fixing bolts 182 through the bolt holes at the round flange end onto the positioning plate 170.

[0100] 3) As Figure 6 shown, align and establish the machining coordinate system with the positioning plate 170 as the reference.

[0101] 4) Milling the flange end face: Use a φ20 end mill for milling. Machining parameters: spindle speed 1500 - 1800 r / min, depth of cut 0.05 - 0.2 mm, feed rate 400 - 500 mm / min. After machining, the flatness reaches 0.03 mm, and the surface roughness is Ra3.2 μm.

[0102] 5) Drill the bolt holes at the flange end: Use a φ2 center drill and a φ8.5 twist drill. Machining parameters: spindle speed 1800 - 2000 r / min, feed rate 0.08 - 0.12 mm / r. After machining, the roundness reaches 0.1 mm, and the surface roughness is Ra6.3 μm.

[0103] 6) Drill and ream the 190 holes for the positioning pins at the flange end: Use a φ2 center drill, a φ7.8 twist drill, and a φ8H8 reamer. Drilling parameters: spindle speed 2000 r / min, feed rate 0.1 mm / r; Reaming parameters: spindle speed 300 r / min, feed rate 0.1 mm / r. After machining, the diameter of the pin holes is φ8 - φ8.02 mm, and the surface roughness is Ra1.6 μm.

[0104] Regarding "performing blue light scanning on the machined casting 10", it specifically includes the following steps: performing blue light scanning on the machined casting 10 to generate scanning data, using three-dimensional inspection software, adopting a "feature-based" alignment method, selecting the machined circular flange end face and the holes of two circular flange end locating pins 190 as feature alignments, comparing the scanning data with the theoretical digital model, and confirming that the surface profile of the non-machined surface of the casting 10 is qualified.

[0105] The casting alignment machining method provided by the present invention has the following advantages:

[0106] 1. The workpiece and the clamping device are clamped once, and the workpiece is aligned, tooled, and the coordinate system is established by automatically rotating and adjusting the tooling, saving time and improving production efficiency.

[0107] 2. During production and machining, there is no need to disassemble the clamping device, and only the workpiece needs to be replaced to achieve batch production, reducing the labor intensity of workers.

[0108] 3. The process method and device have a wide range of applications and are suitable for machining all castings 10 with a curved surface shape.

[0109] 4. The blue light scanning results of the reference sphere 11 are utilized in the processes of machining alignment and tooling, and combined with the use of the clamping device, making the initial reference accuracy of the machining higher.

[0110] 5. The traditional scribing process is omitted, improving the machining efficiency.

[0111] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casting alignment method, characterized in that: The following steps are involved: Processing three reference balls (11), and bonding the reference balls (11) to the casting (10); Scanning a casting (10) with a reference ball (11), fitting the scanned data with a theoretical numerical model, and calculating the diameter size and spherical center coordinate data of the reference ball (11); Mounting the casting (10) with the reference ball (11) on a clamping device; The position of the casting (10) with the reference ball (11) is adjusted by a clamping device, the reference ball (11) is aligned, and a machining coordinate system is established according to the reference ball (11); Processing the casting according to the established processing coordinate system (10); The finished casting (10) is scanned with blue light.

2. The casting alignment method according to claim 1, characterized in that: The reference ball (11) comprises a spherical portion (111) and a base connecting portion (112); The spherical portion (111) and the base connecting portion (112) are connected to each other, and the base connecting portion (112) is used to be fixed on the casting (10).

3. The casting alignment processing method according to claim 1, characterized in that: The method of scanning the casting (10) with the reference ball (11), fitting the scanned data with the theoretical numerical model, and calculating the diameter size and spherical center coordinate data of the reference ball (11) comprises the following steps: Scanning the casting (10) with the reference ball (11) using a non-contact optical scanner to obtain 3D point cloud data, and fitting the 3D point cloud data with the theoretical numerical model using three-dimensional data processing software to ensure that the casting (10) with the reference ball (11) and the theoretical numerical model meet the required dimensions; The diameter size and spherical center coordinate data of the reference sphere (11) are calculated by three-dimensional data processing software.

4. The casting alignment method according to claim 1, characterized in that: The clamping device comprises a machine tool worktable (110), a rotary worktable (120), a first clamping assembly (130), a second clamping assembly (140) and a third clamping assembly (150); The rotary table (120) is installed on the machine tool table (110), the first clamping assembly (130), the second clamping assembly (140) and the third clamping assembly (150) are all arranged on the rotary table (120), and the rotary table (120) is configured to be rotatable around the Z direction; The first clamping assembly (130), the second clamping assembly (140) and the third clamping assembly (150) are all used to clamp and fix the casting (10); The first clamping assembly (130) comprises a driving platen (131) and a driving support (132); The driving support (132) is used to support the casting (10); The driving pressing plate (131) is used to press the casting (10); The driving support (132) and the driving platen (131) are both configured to be movable along the Z direction.

5. The casting alignment method according to claim 4, characterized in that: The step of mounting the casting (10) with the reference ball (11) on the clamping device comprises the following steps: Placing three driving supports (132) and three driving pressure plates (131) on the rotary table (120), and leveling the contact surface between the upper end of the driving support (132) and the casting (10); Place the casting (10) on the driving support (132), and adjust a straight edge of the bottom flange of the casting (10) to be parallel to the X-axis of the machine tool.

6. The casting alignment method according to claim 5, characterized in that: The method of adjusting the position of the casting (10) with the reference ball (11) by means of a clamping device, aligning the reference ball (11), and establishing a machining coordinate system according to the reference ball (11) comprises the following steps: Steps to find the positive Z direction: Using a finder (160) to find the highest points of the three reference balls (11) in the Z-axis direction respectively; Adjust the driving support (132) to move in the Z direction so that the measured values ​​of the highest points in the Z direction of the three reference balls (11) are consistent with the calculated coordinate data of the ball center; Pressing the casting (10) by driving the pressing plate (131); Re-measure and confirm that the actual measured values ​​of the highest points in the Z direction of the three reference spheres (11) are consistent with the calculated coordinate data of the sphere center.

7. The casting alignment method according to claim 6, characterized in that: The method of adjusting the position of the casting (10) with the reference ball (11) by the clamping device, aligning the reference ball (11), and establishing a machining coordinate system according to the reference ball (11) also includes the following steps: Steps to find the positive Y direction: Using a finder (160) to respectively find the highest points of two reference balls (11) in the Y-axis direction; The rotary table (120) is used to make the actual measured values ​​of the highest points in the Y direction of the two reference spheres (11) consistent with the calculated sphere center coordinate data.

8. The casting alignment method according to claim 7, characterized in that: The method of adjusting the position of the casting (10) with the reference ball (11) by the clamping device, aligning the reference ball (11), and establishing a machining coordinate system according to the reference ball (11) also includes the following steps: The machining coordinate system is established based on the reference sphere (11): Use a finder (160) to find the highest point of the Z-direction side of one of the reference balls (11), move along the negative Z direction by |Z1|+D1 / 2+the radius value of the ball head of the photoelectric edge finder, and return the Z axis of the machine tool to zero; Move along the positive Y direction by |Y1|+D1 / 2+radius value of the photoelectric edge finder ball head, and the X axis of the machine tool returns to zero; The highest point of the X-direction side surface of one of the reference balls (11) is found by using a finder (160), and the ball head radius value of the photoelectric edge finder is moved along the positive X direction, and the Y axis of the machine tool is reset to zero.

9. The casting alignment processing method according to claim 1, characterized in that: The method of machining the casting (10) according to establishing a machining coordinate system comprises the following steps: Machining round flange ends: Milling the end face of the circular flange, drilling bolt holes on the circular flange end, and drilling and reaming holes for positioning pins (190) on the circular flange end; Processing method flange end: The positioning plate (170) is placed on the machine tool workbench (110), the side of the positioning plate (170) is straightened by a gauge, and the positioning fixing bolt (181) is tightened onto the positioning plate (170); the casting (10) is placed on the positioning plate (170), the positioning pin (190) is inserted into the positioning plate (170) through the positioning pin (190) hole at the round flange end, and the fixing bolt (182) at the round flange end is tightened onto the positioning plate (170) through the bolt hole at the round flange end; the positioning plate (170) is used as a reference for alignment and establishment of a machining coordinate system; the flange end face is milled; the bolt hole at the flange end is drilled; and the positioning pin (190) hole at the flange end is drilled and reamed.

10. The casting alignment method according to claim 9, characterized in that: The blue light scanning of the finished casting (10) comprises the following steps: The finished casting (10) is scanned with blue light to generate scanning data, and the processed circular flange end face and two circular flange end positioning pin (190) holes are used as feature alignment, and the scanning data is compared with the theoretical digital model to confirm that the surface profile of the non-processed surface of the casting (10) is qualified.

Images