A three-dimensional flow impeller machining tool and machining method

Abstract

The present application relates to the field of machining of three-dimensional flow impeller, and particularly relates to a three-dimensional flow impeller machining tool and a machining method. The method is used for machining and installation by using the three-dimensional flow impeller machining tool. The three-dimensional flow impeller machining tool comprises a fixing table and a butt joint block. The butt joint block is fixed on the fixing table by thread connection. One end of the fixing table is provided with a thread groove. The middle part of one end of the butt joint block is provided with a thread shaft. The thread shaft is threadedly connected in the thread groove. The middle part of the other end of the butt joint block is provided with a claw shaft. The middle part of the claw shaft is provided with a thread hole. The thread shaft and the claw shaft are fixedly connected on the butt joint block. The tool has simple structure. By using the tool and the process sequence, deformation can be avoided on the surface with large area and the arc surface of the three-dimensional flow impeller.

Description

Technical Field

[0001] This invention relates to the field of machining three-dimensional flow impellers, and more particularly to a machining fixture and machining method for three-dimensional flow impellers. Background Technology

[0002] Currently, the three-dimensional flow impeller is the core aerodynamic rotating component of the blower. The quality of fluid flow inside the three-dimensional flow impeller and the size of the rotor directly determine the performance and efficiency of the entire machine. The blower impeller needs to withstand large centrifugal forces and pressures, as well as the temperature and thermal deformation caused by high-pressure and high-speed fluid friction. In addition, when the blower is in a surge state, it needs to withstand large comprehensive impact forces. Fully open impellers can be forged and reprocessed, while impellers for multi-stage centrifugal blowers are closed.

[0003] Currently, the processing of three-dimensional impellers basically involves first clamping the outer diameter and then directly sending it to a five-axis machining center for engraving. However, this process can cause deformation on the larger surface area and the curved surface of the three-dimensional impeller, which can affect its accuracy. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this invention is to provide a three-dimensional flow impeller machining fixture and machining method. Using this fixture and machining method, deformation can be avoided on the side with a larger surface area and on the arc surface of the three-dimensional flow impeller.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for machining a three-dimensional impeller, comprising a machining fixture for machining and installation, the fixture including a fixed platform and a mating block, the mating block being fixed to the fixed platform by a threaded connection; one end of the fixed platform having a threaded groove, and one end of the mating block having a threaded shaft threadedly connected to the threaded groove; the other end of the mating block having a chuck shaft with a threaded hole in its center, wherein both the threaded shaft and the chuck shaft are fixedly connected to the mating block; the method includes the following steps:

[0007] (S1) First, the three-dimensional impeller blank is clamped on a conventional lathe to machine hole A in plane B, ensuring the perpendicularity of hole A, and leaving allowance for plane C and outer circle D; where hole A is a through hole connecting the larger and smaller surface areas of the three-dimensional impeller; plane C is the larger surface area of ​​the three-dimensional impeller; plane B protrudes from the larger surface area of ​​the three-dimensional impeller; outer circle D is the outer diameter of the three-dimensional impeller.

[0008] (S2) Rotate the three-dimensional impeller so that the platform machine tool clamps the outer circle D, and press the plane B against the side of the docking block near the chuck shaft to ensure the axial runout of the C surface. Machining plane F and arc E, leaving a margin for arc E; where plane F is the side of the three-dimensional impeller with the smaller surface area, and arc E is the curved surface from the side of the three-dimensional impeller with the smaller surface area to the outer diameter.

[0009] (S3) Then, the three-dimensional impeller in its blank state is mounted on a five-axis machining center for precision carving of curved blade shapes;

[0010] (S4) Next, use a conventional lathe to clamp the fixing table and fix the threaded shaft on the mating block into the threaded groove on the fixing table through a threaded connection;

[0011] (S5) Insert the three-dimensional impeller into the claw shaft, use a screw to pass through the middle of the three-dimensional impeller and connect it to the threaded hole through the thread to fix the three-dimensional impeller on the mating block.

[0012] (S6) Use a dial indicator to check the plane C of the three-dimensional impeller to ensure its axial runout;

[0013] (S7) Machining the plane C, outer circle D, and arc E with allowance to ensure the accuracy of the three-dimensional flow impeller.

[0014] Preferably, a washer is provided between the screw and the three-dimensional impeller, with one side of the washer abutting against the screw head and the other side abutting against the side of the three-dimensional impeller with a smaller surface area.

[0015] Preferably, the docking block is provided with a plurality of clamping holes at one end near the jaw shaft, and the clamping holes are arranged around the jaw shaft.

[0016] Preferably, the clamping holes are provided in two to six locations.

[0017] Preferably, the diameter of the threaded shaft is smaller than the diameter of the chuck shaft.

[0018] Preferably, the allowance of the plane C is 0.2-0.8mm, the allowance of the outer circle D is 0.2-0.8mm, and the allowance of the arc E is 0.2-0.8mm.

[0019] In summary, the advantages of this invention are:

[0020] The tooling structure is simple. By using this three-dimensional impeller machining tooling, when machining different three-dimensional impellers, it is only necessary to remove the docking block and replace it with a docking block that matches the three-dimensional impeller, without having to replace the fixed table, which is more convenient. Using this machining method, deformation can be avoided on the side with a larger surface area and the arc surface of the three-dimensional impeller, thereby improving the accuracy of the three-dimensional impeller. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of a three-dimensional flow impeller and machining tooling;

[0022] Figure 2 This is a cross-sectional view of the tooling;

[0023] Figure 3 This is a schematic diagram of the docking block structure;

[0024] Figure 4 This is a cross-sectional view of a three-dimensional flow impeller;

[0025] Reference numerals: 1. Fixing platform; 2. Connecting block; 4. Gasket; 11. Threaded groove; 21. Threaded shaft; 22. Claw shaft; 23. Threaded hole; 24. Clamping hole. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figures 1 to 4 As shown, a three-dimensional impeller machining fixture includes a fixed platform 1 and a docking block 2. The docking block 2 is fixed to the fixed platform 1 by a threaded connection. One end of the fixed platform 1 has a threaded groove 11, and the middle of one end of the docking block 2 has a threaded shaft 21, which is threaded into the threaded groove 11. The middle of the other end of the docking block 2 has a chuck shaft 22, and the middle of the chuck shaft 22 has a threaded hole 23. Both the threaded shaft 21 and the chuck shaft 22 are fixedly connected to the docking block 2. The docking block 2 also has several clamping holes 24 on the end near the chuck shaft 22, which are arranged around the chuck shaft 22. There are two to six clamping holes 24. The diameter of the threaded shaft 21 is smaller than the diameter of the chuck shaft 22.

[0028] like Figures 1 to 3 As shown, the threaded shaft 21 on the mating block 2 is connected to the threaded groove 11 on the fixed table 1. In order to ensure the locking state of the mating block 2 and the fixed table 1, a rotating tool can be inserted into the clamping hole 24. By applying rotational force to the rotating tool, it can be checked whether the two have been locked.

[0029] At this point, the side of the three-dimensional impeller with the larger surface area is inserted into the chuck shaft 22. A bolt is then passed through the three-dimensional impeller and connected to the threaded hole 23 on the chuck shaft 22, thus fixing the three-dimensional impeller on the machining fixture. A washer 4 is provided on the bolt and the side of the three-dimensional impeller with the smaller surface area to prevent deformation of the contact surface between the three-dimensional impeller and the bolt due to excessive force applied to the bolt.

[0030] The machining method for a three-dimensional impeller involves the following steps:

[0031] (S1) First, the three-dimensional impeller blank is clamped on a conventional lathe to machine hole A in plane B, ensuring the perpendicularity of hole A, and leaving allowance for plane C and outer circle D; where hole A is a through hole connecting the larger and smaller surface areas of the three-dimensional impeller; plane C is the larger surface area of ​​the three-dimensional impeller; plane B protrudes from the larger surface area of ​​the three-dimensional impeller; outer circle D is the outer diameter of the three-dimensional impeller.

[0032] (S2) Rotate the three-dimensional impeller so that the platform machine tool clamps the outer circle D, and press the plane B against the side of the docking block 2 near the jaw shaft 22 to ensure the axial runout of the C surface. Machining plane F and arc E, leaving a margin for arc E; where plane F is the side of the three-dimensional impeller with the smaller surface area, and arc E is the curved surface from the side of the three-dimensional impeller with the smaller surface area to the outer diameter.

[0033] (S3) Then, the three-dimensional impeller in its blank state is mounted on a five-axis machining center for precision carving of curved blade shapes;

[0034] (S4) Next, use a conventional lathe to clamp the fixing table 1 and fix the threaded shaft 21 on the mating block 2 into the threaded groove 11 on the fixing table 1 through threaded connection;

[0035] (S5) Insert the three-dimensional impeller into the claw shaft 22, use a screw to pass through the middle of the three-dimensional impeller and connect it to the threaded hole 23 through the thread, so that the three-dimensional impeller is fixed on the mating block 2, wherein a washer 4 is provided between the screw and the three-dimensional impeller.

[0036] (S6) Use a dial indicator to check the plane C of the three-dimensional impeller to ensure its axial runout;

[0037] (S7) Machining the plane C, outer circle D, and arc E with allowance to ensure the accuracy of the three-dimensional flow impeller.

[0038] Specifically, according to the method, the allowance for plane C is 0.2-0.8mm, the allowance for outer circle D is 0.2-0.8mm, and the allowance for arc E is 0.2-0.8mm. By setting allowances on each plane of the three-dimensional impeller, the three-dimensional impeller does not require secondary processing, effectively avoiding the deformation problem of plane C and arc E due to insufficient processing allowance.

[0039] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A method for processing a three-dimensional flow impeller, characterized in that, This method uses a three-dimensional impeller machining fixture for machining and installation. The three-dimensional impeller machining fixture includes a fixed platform (1) and a docking block (2). The docking block (2) is fixed to the fixed platform (1) by a threaded connection. One end of the fixed platform (1) is provided with a threaded groove (11). The middle of one end of the docking block (2) is provided with a threaded shaft (21), which is threaded into the threaded groove (11). The middle of the other end of the docking block (2) is provided with a chuck shaft (22). (22) has a threaded hole (23) in the middle, wherein the threaded shaft (21) and the jaw shaft (22) are both fixedly connected to the mating block (2); a washer (4) is provided between the screw and the three-dimensional impeller, one side of the washer (4) abuts against the screw head, and the other side abuts against the side of the three-dimensional impeller with a smaller surface area; the mating block (2) also has several clamping holes (24) at one end near the jaw shaft (22), and the clamping holes (24) are arranged around the jaw shaft (22); the method includes the following steps: (S1) First, the three-dimensional impeller blank is clamped on a conventional lathe to machine hole A in plane B, ensuring the perpendicularity of hole A, and leaving allowance for plane C and outer circle D; where hole A is a through hole connecting the larger and smaller surface areas of the three-dimensional impeller; plane C is the larger surface area of ​​the three-dimensional impeller; plane B protrudes from the larger surface area of ​​the three-dimensional impeller; outer circle D is the outer diameter of the three-dimensional impeller. (S2) Rotate the three-dimensional impeller so that the platform machine tool clamps the outer circle D and presses the plane B against the side of the docking block (2) close to the jaw shaft (22) to ensure the axial runout of the C surface. Machining plane F and arc E, leaving a margin for arc E; where plane F is the side with the smaller surface area of ​​the three-dimensional impeller and arc E is the curved surface from the side with the smaller surface area of ​​the three-dimensional impeller to the outer diameter. (S3) Then, the three-dimensional impeller in its blank state is mounted on a five-axis machining center for precision carving of curved blade shapes; (S4) Next, use a conventional lathe to clamp the fixing table (1) and fix the threaded shaft (21) on the mating block (2) in the threaded groove (11) on the fixing table (1) through threaded connection; (S5) Insert the three-dimensional impeller into the claw shaft (22), use a screw to pass through the middle of the three-dimensional impeller and connect it to the threaded hole (23) through the thread, so that the three-dimensional impeller is fixed on the docking block (2); (S6) Use a dial indicator to check the plane C of the three-dimensional impeller to ensure its axial runout; (S7) Machining the plane C, outer circle D, and arc E with allowance to ensure the accuracy of the three-dimensional flow impeller; The allowance for the plane C is 0.2-0.8mm, the allowance for the outer circle D is 0.2-0.8mm, and the allowance for the arc E is 0.2-0.8mm.

2. The processing method of a three-dimensional flow impeller according to claim 1, characterized in that, The clamping holes (24) are provided in two to six.

3. The processing method of a three-dimensional flow impeller according to claim 1, characterized in that, The diameter of the threaded shaft (21) is smaller than that of the chuck shaft (22).

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