Manufacturing method of large multi-surface spliced rotary body

Abstract

The invention relates to the technical field of shield equipment manufacturing, and discloses a manufacturing method of a large multi-surface spliced rotary body, which comprises the following steps: manufacturing a center block finished product, measuring the distance from a center block connecting surface to the center by adopting a Renishaw measurement method, ensuring that the distances from the center block connecting surfaces to the center are consistent, and planning a machining cutting path of the center block connecting surfaces. A center block finished product is finished; manufacturing an edge block finished product, determining shape coordinates and center coordinates of the edge block by adopting a point location measurement method, calculating the machining allowance of the center and the shape of the edge block by utilizing a three-dimensional modeling software reconstruction model according to the determined shape coordinates of the edge block, and planning a machining cutting path of a connecting surface of the edge block to complete the edge block finished product; and assembling the center block finished product and the side block finished product into the revolving body. The manufacturing precision of the center block finished product and the side block finished product is improved, the problem of multi-face machining folding interference or large contact face gap is solved, the trial assembly and repair procedures are omitted, the assembly time is shortened, and the operation cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of shield equipment manufacturing, and in particular to a method for manufacturing a large multi-faceted spliced ​​rotating body. Background Art

[0002] Shield tunnel boring equipment, referred to as shield equipment, is a special large-scale tunnel boring engineering machinery that integrates optical, mechanical, electrical, hydraulic, sensor and information technology. It has the functions of excavating and cutting soil, transporting soil and ballast, assembling tunnel lining, measuring guidance and correction. It has fast excavation speed, high degree of automation, low labor intensity, high construction quality and safety, and little impact on surface subsidence and environment. It has been widely used in tunnel projects such as subways, railways, highways, municipal, hydropower, etc.

[0003] One of the key components of shield equipment is the cutterhead, which is a large multi-faceted rotating body with a total weight of 80 tons and a diameter of 6.3 meters. It is usually composed of a center block and four side blocks connected to the center block. Since the rotating body is a closed structure composed of five parts with a total of eight surfaces, there is often interference or large gaps between the contact surfaces. The existing manufacturing process is to process the center block and three side blocks into finished products, and use the remaining side block for trial fitting to compensate for the accumulated error. This method will cause the trial fitting process to be extremely cumbersome and difficult to operate. In the end, the manufacturing efficiency and manufacturing quality cannot be effectively guaranteed, which invisibly increases the assembly time and increases the operating cost. In addition, if the trial fitting is not suitable, the equipment needs to be re-processed and clamped for alignment, which increases the quality risk. Through actual measurement, the processing error will usually increase, and it is impossible to assemble it in one go to meet the requirements of the drawing. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for manufacturing a large multi-faceted revolving body, which completes the processing of five parts including a center block and side blocks as separate finished products, and realizes one-time assembly to meet the requirements of the drawings.

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

[0006] A method for manufacturing a large multi-faceted rotating body, wherein the multi-faceted rotating body comprises a central block and side blocks, wherein a connecting surface of the side block is connected to a connecting surface of the central block, comprising:

[0007] Produce the finished center block. Use the Renishaw measurement method to measure the distance from the center block connection surface to the center, ensure that the distance from each center block connection surface to the center is consistent, plan the center block connection surface machining cutting path, and complete the center block product.

[0008] To make the finished edge block, the outer shape coordinates and center coordinates of the edge block are determined by point measurement method, and the determined outer shape coordinates and center coordinates of the edge block are reconstructed by 3D modeling software to calculate the machining allowance of the center and outer shape of the edge block, and the machining cutting path of the edge block connection surface is planned to complete the finished edge block;

[0009] Assemble the finished center block and the finished side blocks into a rotating body.

[0010] As a further technical solution, the finished center block is a cube structure, and the four sides of the cube structure are the center block connection surfaces.

[0011] As a further technical solution, the number of the finished side blocks is four. When assembled into a rotating body, the four side block connecting surfaces are respectively and simultaneously connected to the four center block connecting surfaces.

[0012] As a further technical solution, the steps for planning the cutting path for the center block connection surface are: first use a face milling cutter for cutting, and the face milling cutter path adopts a reciprocating horizontal cutter; then use a high-power milling cutter to process the center block connection surface, and increase the roughness of the center block connection surface to a set value.

[0013] As a further technical solution, the steps for planning the cutting path for edge block connection surface processing are: first use a face milling cutter for cutting, and the face milling cutter path adopts a reciprocating horizontal cutter; then use a high-power milling cutter to process the edge block connection surface, and increase the roughness of the edge block connection surface to a set value.

[0014] As a further technical solution, after planning the cutting path for machining the edge block connection surface, the outer shape coordinates and center coordinates of the edge block are recalibrated to determine the angle and allowance, and then the machining wear is compensated.

[0015] As a further technical solution, before completing the center block, a first positioning pin hole needs to be processed on the center block; before completing the side block, a second positioning pin hole needs to be processed on the side block; the first positioning pin hole and the second positioning pin hole match.

[0016] As a further technical solution, before the finished center block and the finished side block are assembled into a rotating body, they need to be repaired by clamping, and the repairing includes removing burrs and swelling spots.

[0017] As a further technical solution, the specific steps of assembling the finished center block and the finished side block into a rotating body are: first fix and install the finished center block, with the side block connecting surface corresponding to the center block connecting surface, and after positioning with a locating pin, measure the gap between the side block connecting surface and the center block connecting surface, and after the gap is qualified, connect the side block connecting surface and the center block connecting surface with bolts.

[0018] As a further technical solution, the gap between the connecting surface of the side block and the connecting surface of the center block is measured by using a feeler gauge.

[0019] One or more technical solutions of the present invention have the following beneficial effects:

[0020] 1. In the process of manufacturing the center block, the present invention ensures that the distance from the connecting surface of the four center blocks to the center is consistent, avoiding deviations and defects in subsequent assembly. At the same time, the present invention also calculates the outer shape coordinates and center coordinates of the side blocks through point measurement method and reconstruction of the model using 3D modeling software, and accurately determines the processing allowance of the center and outer shape of the side blocks. At the same time, combined with compensation for processing wear, the manufacturing of the finished side blocks is completed, and finally one-time assembly meets the requirements of the drawings. The present invention improves the manufacturing accuracy of the finished center blocks and the finished side blocks, solves the problems of multi-faceted processing interference or large contact surface gaps, eliminates the trial assembly and repair process, has low operating difficulty, shortens assembly time, and saves operating costs.

[0021] 2. When planning the machining cutting paths of the center block connection surfaces and the side block connection surfaces, the present invention first uses a face milling cutter with a diameter of 315mm x 45 degrees, and then uses a powerful milling cutter with a diameter of 315mm, and adopts reciprocating lateral cutting. On the one hand, this improves the machining efficiency. On the other hand, the face milling cutter is mainly used for rough machining or semi-finishing, and there is a certain degree of roughness after machining. Using a powerful milling cutter can further refine the surface, making the center block connection surfaces and the side block connection surfaces smoother, thereby improving the quality of the center block connection surfaces and the side block connection surfaces and facilitating subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a schematic diagram of the assembly structure of the spliced ​​rotating body of the present invention;

[0024] Figure 2 A measurement diagram of the outer shape coordinates when making the finished edge block of the present invention;

[0025] Figure 3 It is a schematic diagram of the edge block structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the central block structure of the present invention;

[0027] Among them, 1. Center block; 2. Side block. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] Embodiment 1

[0030] like Figure 1 As shown, one of the key components of the shield equipment is the cutterhead body, which is a large multi-faceted spliced ​​rotating body, including a center block and side blocks, wherein the side block connecting surfaces are connected to the center block connecting surfaces, but the traditional processing technology often has problems of multi-faceted processing interference or large contact surface gaps. The current existing manufacturing process is to process the center block and three side blocks into finished products, and use the remaining side block for trial matching to compensate for the accumulated error. However, unlike the prior art, the present embodiment provides a large multi-faceted spliced ​​rotating body manufacturing method, which is to separately manufacture the center block and the side block finished products, and assemble the side blocks on the center block at the same time, and achieve a one-time assembly to meet the drawing requirements.

[0031] Specifically include: Figure 4 As shown, the center block is made into a finished product. First, since the center block is located in the center of the cutter body, and the center block connection surface is connected to the side block connection surface, it is necessary to ensure that the distance from the four surfaces to the center is consistent. Therefore, in this embodiment, the Renishaw measurement method is used to measure the distance from the center block connection surface to the center, and the measured distance is used for processing to ensure that the distance from each center block connection surface to the center is consistent, so as to avoid deviations and defects in subsequent assembly. Then, in this embodiment, the center block connection surface processing cutting path is also planned, and the specific steps are: first, rough processing is performed, using a 315mmx45 degree face milling cutter, and the face milling cutter path uses reciprocating lateral cutting to improve processing efficiency, and then fine processing is performed, using a 315mm diameter strong milling cutter to process the center block connection surface, and the roughness of the center block connection surface is increased to the set value, specifically, the roughness is increased to Ra3.2. The smaller the roughness Ra value, the smoother the surface. Ra3.2 means that within the sampling length, the arithmetic mean of the absolute value of the contour offset is 3.2 microns. The use of a 315mmx45 degree face milling cutter and reciprocating lateral tool movement for rough machining improves machining efficiency, but there is a certain degree of roughness after rough machining, which cannot be used for subsequent assembly. The use of a 315mm diameter strong milling cutter for fine machining can further refine the surface of the center block connection surface, making the center block connection surface smoother, improving the quality of the center block connection surface, and facilitating subsequent assembly. In addition, in this embodiment, before completing the center block product, it is necessary to process the first positioning pin hole on the center block for precise positioning during subsequent assembly. The manufactured center block product is a cube structure, and the four sides of the cube structure are the center block connection surfaces.

[0032] like Figure 2As shown, when manufacturing the finished edge block, since the outer circle of the edge block is a blank, in this embodiment, the point measurement method is used to determine the outer shape coordinates and center coordinates of the edge block, and the determined outer shape coordinates and center coordinates of the edge block are reconstructed using the three-dimensional modeling software to calculate the processing allowance of the center and outer shape of the edge block. Specifically, the outer shape coordinates of the edge block are determined as follows: Renezau is selected in this embodiment, and other high-precision measurement tools can also be used, such as optical measuring equipment; according to the shape of the edge block, the measurement points are reasonably distributed. In this embodiment, the edge block is divided into 12 points, and the edge block is fixed on a three-dimensional coordinate measuring instrument. The three-dimensional coordinate value (X, Y, Z) of each point is measured in turn using the three-dimensional coordinate measuring instrument, and the measured outer shape coordinates are imported into computer software, such as CAD software, and the points are connected to form the outer contour of the edge block. The center coordinates of the edge block are determined as follows: the center coordinates of the edge block can be determined by the average value of the outer shape coordinates of the edge block. Specifically, the average values ​​of the coordinate values ​​in the three directions of X, Y, and Z are calculated respectively, and these average values ​​are used as the center coordinates of the edge block. For example, in this embodiment, the edge block is set at 12 points, and the coordinates of the 12 points are: (X1, Y1, Z1), (X2, Y2, Z2), ..., (X 12 ,Y 12 ,Z 12 ), then the coordinate value of the center coordinate in the X direction is (X1+X2+…+X 12 ) / 12, and the same applies to the Y and Z directions.

[0033] After obtaining the above-mentioned shape coordinates and center coordinates, the 3D modeling software is used to reconstruct the model to calculate the machining allowance of the edge block center and shape. Specifically, the shape coordinates and center coordinates are imported into the 3D modeling software to reconstruct the model, and the shape contour of the edge block is generated. Then, the shape contour is converted into a solid model in the model. Next, the machining allowance is calculated. First, the design dimensions and requirements of the edge block in the drawing are obtained, and then the actual dimensions of the edge block in the solid model are obtained. The design dimensions and actual dimensions include but are not limited to the length, width, height and dimensions of certain key positions. For the machining allowance of the shape, the actual measured dimensions are compared with the design dimensions. For example, if the design dimension length is Ld and the actual dimension length is La, the machining allowance of the shape is Ld-La. For the machining allowance of the center, it can be determined by comparing the center coordinates of the solid model with the design center coordinates, and calculating the coordinate difference in each direction, that is, the machining allowance of the center.

[0034] Then, the present embodiment also plans the cutting path for processing the edge block connection surface. The specific steps are as follows: first, rough processing is performed using a face milling cutter with a diameter of 315mm x 45 degrees. The face milling cutter path adopts a reciprocating lateral cut to improve processing efficiency. Then, fine processing is performed using a powerful milling cutter with a diameter of 315mm to process the edge block connection surface and increase the roughness of the edge block connection surface to a set value. Specifically, the roughness is increased to Ra3.2. The smaller the roughness Ra value, the smoother the surface. Ra3.2 means that within the sampling length, the arithmetic mean of the absolute value of the contour offset is 3.2 microns. Using a 315mm x 45 degree face milling cutter and reciprocating lateral cuts for rough processing improves processing efficiency. However, there is a certain degree of roughness after rough processing, and subsequent assembly is not used. Using a powerful milling cutter with a diameter of 315mm for fine processing can further refine the surface of the edge block connection surface, making the edge block connection surface smoother, improving the quality of the edge block connection surface, and facilitating subsequent assembly. After planning the cutting path for the edge block connection surface, recalibrate the outer shape coordinates and center coordinates of the edge block to determine the angle and allowance, and then compensate for the machining wear. Among them, the angle is the edge block connection angle. The center block and the edge block are assembled together with a total of eight faces, of which four are connected to the center block, and the other four are angle faces of the adjacent edge blocks.

[0035] In addition, in this embodiment, Figure 3 As shown, there are four finished side blocks. When assembled into a rotating body, the four side block connection surfaces are connected to the four center block connection surfaces at the same time. Before the side block is completed, a second positioning pin hole needs to be processed on the side block, and the second positioning pin hole on the side block matches the first positioning pin hole on the center block.

[0036] After the finished center block and the finished side block are manufactured separately, the finished center block and the finished side block need to be assembled into a rotating body. Before the finished center block and the finished side block are assembled into a rotating body, they need to be repaired by clamping, which includes removing burrs and swelling spots. The specific steps for assembling the finished center block and the finished side block into a rotating body are as follows: first fix the finished center block, install the finished center block on the cutter head body, and the four side block connection surfaces correspond to the four center block connection surfaces respectively. Align the first positioning pin hole with the second positioning pin hole, and after positioning with the positioning pin, measure the gap between the side block connection surface and the center block connection surface. Specifically, use a feeler gauge to measure. After the gap is qualified, connect the side block connection surface and the center block connection surface with bolts. Specifically, tighten the bolts of the side block connection surface and the center block connection surface to ensure that the connection surface is evenly stressed and the gap meets the requirements of the drawing.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a large multi-faceted rotating body, wherein the multi-faceted rotating body comprises a central block and side blocks, wherein the connecting surface of the side blocks is connected to the connecting surface of the central block, characterized in that: include: Produce the finished center block. Use the Renishaw measurement method to measure the distance from the center block connection surface to the center, ensure that the distance from each center block connection surface to the center is consistent, plan the center block connection surface machining cutting path, and complete the center block product. To make the finished edge block, the outer shape coordinates and center coordinates of the edge block are determined by point measurement method, and the determined outer shape coordinates and center coordinates of the edge block are reconstructed by 3D modeling software to calculate the machining allowance of the center and outer shape of the edge block, and the machining cutting path of the edge block connection surface is planned to complete the finished edge block; Assemble the finished center block and the finished side blocks into a rotating body.

2. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: The finished center block is a cube structure, and the four sides of the cube structure are the center block connection surfaces.

3. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: The number of the finished side blocks is four. When assembled into a rotating body, the four side block connecting surfaces are respectively and simultaneously connected to the four center block connecting surfaces.

4. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: The steps of planning the cutting path for the center block connection surface are: first use a face milling cutter for cutting, and the face milling cutter path adopts a reciprocating horizontal cut; then use a strong milling cutter to process the center block connection surface, and increase the roughness of the center block connection surface to a set value.

5. The method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: The steps of planning the cutting path for processing the edge block connection surface are: first use a face milling cutter to cut, and the face milling cutter path adopts a reciprocating horizontal cut; then use a strong milling cutter to process the edge block connection surface, and increase the roughness of the edge block connection surface to a set value.

6. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: After planning the cutting path for machining the edge block connection surface, the outer shape coordinates and center coordinates of the edge block are recalibrated to determine the angle and allowance, and then the machining wear is compensated.

7. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: Before the center block is finished, a first positioning pin hole needs to be processed on the center block; before the side block is finished, a second positioning pin hole needs to be processed on the side block; the first positioning pin hole and the second positioning pin hole match each other.

8. A method for manufacturing a large multi-faceted rotating body as claimed in claim 1, characterized in that: Before the finished center block and the finished side block are assembled into a rotating body, they need to be repaired by clamping, and the repairing includes removing burrs and swellings.

9. A method for manufacturing a large multi-faceted rotating body according to claim 1, characterized in that: The specific steps of assembling the finished center block and the finished side block into a rotating body are as follows: first fix and install the finished center block, with the side block connecting surface corresponding to the center block connecting surface, and after positioning with positioning pins, measure the gap between the side block connecting surface and the center block connecting surface. After the gap is qualified, connect the side block connecting surface and the center block connecting surface with bolts.

10. A method for manufacturing a large multi-faceted rotating body according to claim 9, characterized in that: The method of measuring the gap between the connecting surface of the side block and the connecting surface of the center block is specifically: measuring with a feeler gauge.

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