Hollow screw rotor machining device

Abstract

The utility model provides a hollow screw rotor machining device, and relates to the technical field of hollow screw rotor machining. The tool comprises a positioning block and a tool body, the positioning block is connected with the tool body, a positioning part is arranged at the end, away from the tool body, of the positioning block, and any end of the hollow screw rotor can stretch into the tool body and the positioning block and make contact with the positioning part to form a positioning end. And meanwhile, the other end of the tool body can penetrate out of the tool body to form a to-be-machined end, a locking part is arranged at the end, away from the positioning block, of the tool body, and the locking part can lock and fix the hollow screw rotor. The hollow screw rotor machining device has higher positioning precision under the cooperation of the positioning block and the tool main body, so that the machining precision of the hollow screw rotor can be improved, the coaxiality is effectively ensured, the use requirement can be met, and meanwhile, the hollow screw rotor machining device is easy to disassemble and assemble and more suitable for batch production.

Description

Technical Field

[0001] This utility model relates to the field of hollow screw rotor processing technology, and in particular to a hollow screw rotor processing device. Background Technology

[0002] Traditional screw rotors are typically solid, machined from a single bar stock. The manufacturing process involves first machining the joint threads and drilling the center hole, then cyclone milling the helical surface, and finally rolling and polishing. Later, to improve pump lifespan and reduce power consumption, hollow screw rotors were adopted in some large pumps, thereby reducing weight and improving efficiency.

[0003] The difference between a hollow screw rotor and a solid screw rotor is that a hollow screw rotor needs to have both ends sealed to maintain its hollow state and prevent water from entering. Therefore, end caps and connectors need to be added to both ends of the hollow screw rotor, and the end caps and connectors are welded to both ends of the hollow rotor using a laser welding process. Then, threaded holes need to be made on the connectors, and center holes need to be made on the end caps. The threaded holes and center holes need to be coaxial.

[0004] The applicant has discovered at least the following technical problems in the prior art: when machining threaded holes and center holes, the lack of positioning leads to low machining accuracy, the coaxiality cannot meet the requirements, and it also cannot meet the needs of mass production. Utility Model Content

[0005] The purpose of this utility model is to provide a hollow screw rotor processing device to solve the technical problems existing in the prior art. The various technical effects of the preferred technical solutions among the many technical solutions provided by this utility model are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A hollow screw rotor processing device includes a positioning block and a tooling body. The positioning block is connected to the tooling body. A positioning part is provided at one end of the positioning block away from the tooling body. Either end of the hollow screw rotor can extend into the tooling body and the positioning block and contact the positioning part to form a positioning end. At the same time, the other end can extend out of the tooling body to form a processing end. A locking part is provided at one end of the tooling body away from the positioning block. The locking part can lock and fix the hollow screw rotor.

[0008] Preferably, the hollow screw rotor includes an end cap, a screw rotor body, and a connector connected in sequence. The end cap can form the positioning end and the connector can form the end to be processed, or the connector can form the positioning end and the end cap can form the end to be processed.

[0009] Preferably, the positioning block is integrally connected to the tooling body.

[0010] Preferably, the positioning block further includes a first connecting part connected to the positioning portion, and the tooling body further includes a second connecting part connected to the locking portion, wherein the first connecting part is connected to the second connecting part.

[0011] Preferably, the first connecting part and the second connecting part are detachably connected.

[0012] Preferably, the first connecting part and the second connecting part are bolted together by fixing bolts.

[0013] Preferably, the positioning part includes an end plate and a side plate, the end plate is connected to the side plate, the side plate is connected to the first connecting part, and the end of the positioning end can contact the end plate.

[0014] Preferably, the side plate is annular and has a notch.

[0015] Preferably, the locking part is a tubular structure, and the locking part is provided with a dividing groove and is divided by the dividing groove to form a first locking half tube and a second locking half tube. In the circumferential direction, one end of the first locking half tube is fixedly connected to one end of the second locking half tube, and the other end of the first locking half tube and the other end of the second locking half tube are detachably connected by a locking bolt.

[0016] Preferably, the connection end where the first locking half tube and the second locking half tube are fixedly connected is cut to form a flat surface.

[0017] The beneficial effects of this utility model are as follows: a positioning part is provided at the end of the positioning block away from the tooling body, and any end of the hollow screw rotor can extend into the tooling body and the positioning block and contact the positioning part to form a positioning end, while the other end can pass through the tooling body to form a processing end. That is, the two ends of the hollow screw rotor can be switched between the positioning end and the processing end, so that both ends of the hollow screw rotor can be processed by the hollow screw rotor processing device and are limited at the other end during processing.

[0018] A locking part is provided at the end of the tooling body away from the positioning block. After the hollow screw rotor is installed into the hollow screw rotor processing device, the locking part can be adjusted. The locking part can lock and fix the hollow screw rotor. In this state, the hollow screw rotor can be connected with the processing device and maintain synchronous movement. When the CNC lathe drives the processing device to rotate, it can drive the hollow screw rotor to rotate synchronously.

[0019] With the cooperation of the positioning block and the tooling body, the hollow screw rotor processing device has higher positioning accuracy, thus improving the processing accuracy of the hollow screw rotor and effectively ensuring coaxiality. The accuracy of the hollow screw rotor after processing is basically the same as that of the solid screw rotor, which can meet the usage requirements. At the same time, it is easy to disassemble and assemble, making it more suitable for mass production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural view of the present invention from another perspective;

[0023] Figure 3 This is a cross-sectional view of the end cap as the positioning end and the connector as the end to be processed in this utility model.

[0024] Figure 4 This is a front view of the end cap as the positioning end and the connector as the end to be processed in this utility model.

[0025] Figure 5 This is a cross-sectional view of the connector of this utility model as the positioning end and the end cap as the end to be processed.

[0026] Figure 6 This is a front view of the connector of this utility model as the positioning end and the end cap as the end to be processed.

[0027] In the figure: 1. Positioning block; 11. Positioning part; 111. End plate; 112. Side plate; 12. First connecting part;

[0028] 2. Fixture body; 21. Locking part; 211. First locking half-pipe; 212. Second locking half-pipe; 213. Locking bolt; 214. Dividing groove; 215. Plane; 22. Second connecting part;

[0029] 3. Hollow screw rotor; 31. End cap; 32. Screw rotor body; 33. Connector;

[0030] 4. Fixing bolts. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "side," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Reference Figures 1 to 6 This utility model provides a hollow screw rotor processing device, including a positioning block 1 and a tooling body 2. The positioning block 1 is connected to the tooling body 2, and the hollow screw rotor processing device can be clamped on a CNC lathe through the tooling body 2.

[0035] A positioning part 11 is provided at the end of the positioning block 1 away from the tooling body 2. Either end of the hollow screw rotor 3 can extend into the tooling body 2 and the positioning block 1 and contact the positioning part 11 to form a positioning end. At the same time, the other end can pass through the tooling body 2 to form a processing end. That is, the two ends of the hollow screw rotor 3 can be switched between the positioning end and the processing end, so that both ends of the hollow screw rotor 3 can be processed by the hollow screw rotor processing device and are limited at the other end during processing.

[0036] A locking part 21 is provided at the end of the tooling body 2 away from the positioning block 1. After the hollow screw rotor 3 is installed into the hollow screw rotor processing device, the locking part 21 can be adjusted. The locking part 21 can lock and fix the hollow screw rotor 3. In this state, the hollow screw rotor 3 can be connected with the processing device and maintain synchronous movement. When the CNC lathe drives the processing device to rotate, it can drive the hollow screw rotor 3 to rotate synchronously.

[0037] In this embodiment, the hollow screw rotor 3 includes an end cover 31, a screw rotor body 32, and a connector 33 connected in sequence. In actual use, the end cover 31 and the connector 33 can switch between a positioning end and a processing end. The end cover 31 can form a positioning end and the connector 33 can form a processing end, or the connector 33 can form a positioning end and the end cover 31 can form a processing end.

[0038] In the actual processing, the processing can be divided into two steps. In the first step, the main body of the tooling 2 is clamped on the CNC lathe, and then the hollow screw rotor 3 is placed in the processing device and locked and fixed using the locking part 21. In this step, the end cover 31 is used as the positioning end and forms a positioning contact with the positioning part 11. The connector 33 is used as the end to be processed. The end face and threaded hole of the connector 33 are processed using the CNC lathe. With the cooperation of the positioning block 1 and the main body of the tooling 2, it can effectively ensure that the threaded hole and the screw rotor body 32 are coaxial and the end face and the threaded hole are perpendicular to each other.

[0039] In the second step, first release the locking part 21, then take out the hollow screw rotor 3, reverse it and put it into the processing device, and lock it again using the locking part 21. In this step, the connector 33 is used as the positioning end to form a positioning contact with the positioning part 11, and the end cover 31 is used as the end to be processed. The center hole of the end cover 31 is processed using a CNC lathe. With the cooperation of the positioning block 1 and the tooling body 2, the D coaxiality of the center hole and the screw rotor body 32 can be effectively guaranteed, and the accurate coaxiality of the threaded hole and the center hole can be achieved. Subsequent processing can use the threaded hole and the center hole as a reference to perform subsequent operations such as rolling polishing.

[0040] With the cooperation of positioning block 1 and tooling body 2, the hollow screw rotor processing device has higher positioning accuracy, thus improving the processing accuracy of the hollow screw rotor and effectively ensuring coaxiality. The accuracy of the hollow screw rotor after processing is basically the same as that of the solid screw rotor, so it can meet the usage requirements. At the same time, it is easy to disassemble and assemble, making it more suitable for mass production.

[0041] As an optional implementation, the positioning block 1 and the tooling body 2 can be connected in an integrated manner, and the two can be made into an integrated structure during the production and processing.

[0042] The positioning block 1 and the tooling body 2 can also be connected in a detachable manner. When this connection method is adopted, the positioning block 1 preferably includes a first connecting part 12 connected to the positioning part 11, and the tooling body 2 preferably includes a second connecting part 22 connected to the locking part 21. The positioning block 1 and the tooling body 2 are connected through the first connecting part 12 and the second connecting part 22.

[0043] Furthermore, the first connecting part 12 and the second connecting part 22 are preferably connected by fixing bolts 4. The fixing bolts 4 are preferably evenly distributed in the circumferential direction. The bolt connection has good connection strength and is easier to disassemble and assemble.

[0044] As an optional implementation, the positioning part 11 includes an end plate 111 and a side plate 112, the end plate 111 is connected to the side plate 112, and the side plate 112 is connected to the first connecting part 12;

[0045] The inner wall of the end plate 111 is flat and can match the end face of the end cover 31 or the connector 33. The end of the positioning end can contact the end plate 111.

[0046] As an optional implementation, the side plate 112 is preferably an annular structure, and when necessary, the side plate 112 can be set to a completely closed state;

[0047] When necessary, the side plate 112 preferably has a notch. Since some debris may fall into the positioning block 1 and the tooling body 2 during the processing of the hollow screw rotor 3, which is not easy to clean, if ventilation is selected at one end of the locking part 21 with the help of an external blowing device, the debris can be blown out from the notch of the side plate 112 at one end of the positioning part 11, making it easier to clean.

[0048] Furthermore, since the threaded hole formed in the first step will be located at the end plate 111 in the second step, the burrs formed during the opening process of the threaded hole can damage the end plate 111. Therefore, it is preferable to set the opening at the center of the end plate 111. The opening can avoid the burrs and prevent damage.

[0049] As an optional implementation, the locking part 21 is a tubular structure. The locking part 21 is provided with a dividing groove 214 and is divided by the dividing groove 214 to form a first locking half tube 211 and a second locking half tube 212. In the circumferential direction, one end of the first locking half tube 211 is fixedly connected to one end of the second locking half tube 212, and the other end of the first locking half tube 211 and the other end of the second locking half tube 212 are detachably connected by a locking bolt 213.

[0050] With this configuration, the second locking half tube 212 has a certain degree of elasticity relative to the first locking half tube 211, and can deform to a certain extent under stress. Therefore, only all the locking bolts 213 need to be adjusted to fix the locking part 21 to the hollow screw rotor 3, making the adjustment more convenient and quick.

[0051] As an optional implementation, the connection end where the first locking half tube 211 and the second locking half tube 212 are fixedly connected is cut to form a plane 215. The plane 215 can reduce the rigidity of the second locking half tube 212, giving it greater elasticity and facilitating the use of the locking bolt 213.

[0052] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hollow screw rotor processing device, characterized in that, The fixture includes a positioning block (1) and a tooling body (2). The positioning block (1) is connected to the tooling body (2). A positioning part (11) is provided at one end of the positioning block (1) away from the tooling body (2). Either end of the hollow screw rotor (3) can extend into the tooling body (2) and the positioning block (1) and contact the positioning part (11) to form a positioning end. At the same time, the other end can pass through the tooling body (2) to form a processing end. A locking part (21) is provided at one end of the tooling body (2) away from the positioning block (1). The locking part (21) can lock and fix the hollow screw rotor (3).

2. The hollow screw rotor processing device according to claim 1, characterized in that, The hollow screw rotor (3) includes an end cap (31), a screw rotor body (32), and a connector (33) connected in sequence. The end cap (31) can form the positioning end and the connector (33) can form the end to be processed, or the connector (33) can form the positioning end and the end cap (31) can form the end to be processed.

3. The hollow screw rotor processing device according to claim 1, characterized in that, The positioning block (1) is integrally connected to the tooling body (2).

4. The hollow screw rotor processing device according to claim 1, characterized in that, The positioning block (1) further includes a first connecting part (12) connected to the positioning part (11), and the tooling body (2) further includes a second connecting part (22) connected to the locking part (21), wherein the first connecting part (12) is connected to the second connecting part (22).

5. The hollow screw rotor processing device according to claim 4, characterized in that, The first connecting part (12) and the second connecting part (22) are detachably connected.

6. The hollow screw rotor processing device according to claim 5, characterized in that, The first connecting part (12) and the second connecting part (22) are bolted together by fixing bolts (4).

7. The hollow screw rotor processing device according to claim 4, characterized in that, The positioning part (11) includes an end plate (111) and a side plate (112). The end plate (111) is connected to the side plate (112), and the side plate (112) is connected to the first connecting part (12). The end of the positioning end can contact the end plate (111).

8. The hollow screw rotor processing device according to claim 7, characterized in that, The side plate (112) is annular and has a notch.

9. The hollow screw rotor processing device according to claim 1, characterized in that, The locking part (21) is a tubular structure. The locking part (21) is provided with a dividing groove (214) and is divided by the dividing groove (214) to form a first locking half tube (211) and a second locking half tube (212). In the circumferential direction, one end of the first locking half tube (211) is fixedly connected to one end of the second locking half tube (212), and the other end of the first locking half tube (211) and the other end of the second locking half tube (212) are detachably connected by a locking bolt (213).

10. The hollow screw rotor processing device according to claim 9, characterized in that, The connection end of the first locking half tube (211) and the second locking half tube (212) that are fixedly connected is cut to form a flat surface (215).

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