A spiral rotor hobbing tool

Abstract

The present invention provides a spiral rotor rolling tool, which relates to the field of metal processing technology and solves the current technical problems of low spiral rotor processing accuracy and low processing efficiency. The spiral rotor rolling tool comprises a flange 1 (1), a plurality of knife blocks (2), a plurality of blades (4) and a flange 2 (3). The present invention forms a complete spiral rotor forming surface cutting edge by overlapping the blades (4) installed on the knife blocks (2). The tool and the workpiece perform mutual meshing movement, which not only improves the spiral rotor processing accuracy but also improves the processing efficiency. The convex square platform (11) and the concave square groove (12) between the knife blocks (2) cooperate to fix the circumferential position between adjacent knife blocks (4). At the same time, the adjacent knife blocks (2) are fixed by a locking screw 2 (7). Then, the flange 1 (1), the flange 2 (3) and the knife block (2) are connected as a whole by the locking screw 1 (6). The structure is compact.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a spiral rotor rolling tool. Background Art

[0002] The helical rotor compressor has the advantages of small size, light weight, and easy maintenance. It is currently a rapidly developing type of refrigeration compressor. This has led to great progress in the screw profile design and structural design, and also puts forward higher requirements for the processing accuracy and efficiency of the helical rotor. At present, the screw rotor mainly uses special milling machines and special grinders, which to a large extent ensure the processing accuracy and efficiency of the key parts of the helical rotor, so that the performance of the helical rotor compressor has been effectively improved. Due to the continuous improvement of the working reliability of the helical rotor compressor, it has gradually replaced the reciprocating compressor in the medium refrigeration capacity range and occupied part of the market of the centrifugal compressor.

[0003] As the demand for spiral rotor compressors grows, more requirements for spiral rotor processing tools have emerged. On the one hand, the main processing method currently used is to first use milling to process, leaving a certain margin, and then use a special grinder for grinding. Because the milling method is to process one spiral groove after processing the next spiral groove, the spiral grooves processed one by one have a certain error in the circumferential indexing accuracy. On the other hand, due to the very high price of special grinders, this has also formed a certain restriction on the processing accuracy of spiral rotors in some companies. Summary of the invention

[0004] The purpose of the present invention is to provide a spiral rotor rolling tool, wherein the blades installed on the blade block overlap each other to form a complete spiral rotor forming surface cutting edge, and the required profile is processed by rolling. There are convex square platforms and concave square grooves between the blade blocks to fix the circumferential position of the blade block between the blade blocks, and the blade blocks are connected by locking screws. Finally, the left and right flanges and the blade blocks are connected as a whole by locking screws. The structure is compact, and very few spare parts are used to ensure the accuracy of the final blade cutting edge on the theoretical spiral surface. The rolling method is more efficient, and even for some spiral rotors, fine rolling can be directly performed without grinding. The tool rotates one circle, the spiral rotor rotates one tooth groove, and the tool and the workpiece engage with each other, which not only improves the processing accuracy of the spiral rotor, but also improves the processing efficiency, and solves the current technical problems of low processing accuracy and low processing efficiency of spiral rotors. The many technical effects that can be produced by the preferred technical scheme among the many technical schemes provided by the present invention are described in detail below.

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

[0006] A spiral rotor hobbing tool comprises a flange 1, a plurality of tool blocks, a plurality of blades and a flange 2; wherein:

[0007] Each of the blade blocks is provided with a plurality of screw holes;

[0008] The flange 1 and the flange 2 are both mounted on the blade block via a plurality of locking screws;

[0009] The locking screws include locking screw 1 and locking screw 2;

[0010] Each of the blade blocks is provided with a plurality of blade slots;

[0011] A plurality of said blades are installed in corresponding blade slots in the form of a helical surface;

[0012] The blade block is provided with a convex square platform at one end and a concave square groove at the other end;

[0013] The convex square platform and the concave square groove cooperate with each other;

[0014] Each of the blades is provided with an inner groove;

[0015] The flange 1 is provided with a concave square groove 2 corresponding to the convex square platform 1;

[0016] The second flange is provided with a second convex square platform corresponding to the first concave square groove;

[0017] The flange 1, the blade block and the flange 2 are all provided with corresponding through holes, keyways and locking screw holes corresponding to the locking screws.

[0018] Optionally or preferably, each of the blades is mounted in the blade slot by a compression screw.

[0019] Optionally or preferably, a side positioning surface and a radial positioning surface are provided beside the blade slot.

[0020] Optionally or preferably, the blade slot is provided with a blade locking screw hole corresponding to the clamping screw.

[0021] Optionally or preferably, an axial adjustment gasket and a radial adjustment gasket are installed on the side positioning surface, the axial adjustment gasket is in contact with the blade groove, and the radial adjustment gasket is in contact with the inner groove and the positioning surface respectively.

[0022] Optionally or preferably, the axis of the clamping screw has a certain angle with the blade slot.

[0023] Optionally or preferably, a locking countersunk hole corresponding to the locking screw is provided on the second flange.

[0024] Based on the above technical solution, the following technical effects can be produced:

[0025] The present invention provides a spiral rotor rolling tool, which is suitable for spiral rotor processing operations. The present invention overlaps the blades installed on the tool blocks to form a complete spiral rotor forming surface cutting edge, and processes the required profile by rolling. There are convex square platforms and concave square grooves between the tool blocks to fix the circumferential position of the tool blocks between the tool blocks. At the same time, there are locking screws between the tool blocks, and finally the left and right flanges and the tool blocks are connected as a whole by locking screws. The structure is compact and uses very few spare parts to ensure the accuracy of the final blade cutting edge on the theoretical spiral surface. The rolling method is more efficient. Even for some spiral rotors, fine rolling can be directly performed without grinding. The tool rotates one circle, the spiral rotor rotates one tooth groove, and the tool and the workpiece engage with each other, which not only improves the processing accuracy of the spiral rotor, but also improves the processing efficiency. The current technical problems of low processing accuracy and low processing efficiency of spiral rotors are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram (front view) of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the present invention (right view);

[0029] Figure 3 It is a structural schematic diagram (cross-sectional view) of the present invention;

[0030] Figure 4 It is the structural diagram of the knife block (left view);

[0031] Figure 5 It is the structural diagram of the knife block (right view);

[0032] Figure 6 It is a schematic diagram of the structure for installing the blade;

[0033] Figure 7 It is a structural schematic diagram of flange 1;

[0034] Figure 8 It is the structural schematic diagram of flange 2;

[0035] In the figure: 1. Flange 1; 2. Blade block; 3. Flange 2; 4. Blade; 5. Locking countersunk hole; 6. Locking screw 1; 7. Locking screw 2; 8. Compression screw; 9. Axial adjustment gasket; 10. Radial adjustment gasket; 11. Convex platform 1; 12. Concave square groove 1; 13. Through hole; 14. Keyway; 15. Locking screw hole; 16. Side positioning surface; 17. Blade groove; 18. Radial positioning surface; 19. Blade locking screw hole; 20. Inner groove; 21. Convex platform 2; 22. Concave square groove 2; 23. Screw through hole. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0038] like Figure 1-8 As shown:

[0039] The present invention provides a spiral rotor hobbing tool, comprising a flange 1, a plurality of tool blocks 2, a plurality of blades 4 and a flange 3, wherein:

[0040] Each of the blade blocks 2 is provided with a plurality of screw holes 23;

[0041] The flange 1 and flange 2 3 are both mounted on the blade block 2 via a plurality of locking screws;

[0042] The locking screws include a locking screw 1 6 and a locking screw 2 7;

[0043] Each of the blade blocks 2 is provided with a plurality of blade slots 17;

[0044] The plurality of blades 4 are installed in corresponding blade slots 17 in a spiral manner;

[0045] The blade block 2 is provided with a convex square platform 11 at one end and a concave square groove 12 at the other end;

[0046] The convex square platform 11 and the concave square groove 12 cooperate with each other;

[0047] Each of the blades 4 is provided with an inner groove 20;

[0048] The flange 1 is provided with a concave square groove 22 corresponding to the convex square platform 11;

[0049] The flange 2 3 is provided with a convex square platform 21 corresponding to the concave square groove 12;

[0050] The flange 1, the blade block 2 and the flange 2 3 are all provided with corresponding through holes 13, keyways 14 and locking screw holes 15 corresponding to the locking screws.

[0051] As an optional embodiment, each of the blades 4 is installed in the blade slot 17 by a tightening screw 8 .

[0052] As an optional implementation, a lateral positioning surface 16 and a radial positioning surface 18 are provided beside the insert slot 17 .

[0053] As an optional implementation, the blade slot 17 is provided with a blade locking screw hole 19 corresponding to the clamping screw 8 .

[0054] As an optional implementation, an axial adjustment gasket 9 and a radial adjustment gasket 10 are installed on the side positioning surface 16, the axial adjustment gasket 9 is in contact with the blade groove 17, and the radial adjustment gasket 10 is respectively in contact with the inner groove 20 and the positioning surface 18, and the blade 4 and the adjustment gasket are fastened in the corresponding blade groove 17 by the blade clamping screw 8, so that the cutting edge position of the blade 4 can be fine-tuned by axial adjustment gaskets 9 and radial adjustment gaskets 10 of different thicknesses, so as to ensure the accuracy requirements of the blade cutting edge.

[0055] As an optional implementation, the axis of the clamping screw 8 has a certain angle with the blade groove 17. When the clamping screw 8 locks the blade 4 in the blade locking screw hole 19, it not only clamps the blade 4 and the axial adjustment gasket 9, but also applies a component force to the radial adjustment gasket 10, so that the entire adjustment system is tightened and reliable.

[0056] As an optional implementation, the flange 2 3 is provided with a locking countersunk hole 5 corresponding to the locking screw.

[0057] As an optional implementation, a plurality of blades 4 are installed in corresponding blade grooves 17 in the form of a helical surface, forming a complete axial cutting edge.

[0058] As an optional implementation, the convex square platform 11 and the concave square groove 12 cooperate with each other, and the convex square platform 11 of the blade block 2 and the concave square groove 12 of the adjacent blade block 2 precisely cooperate with each other to fix their circumferential positions, while also ensuring the coaxiality requirements of the mutual through holes 13.

[0059] As an optional implementation, the locking screw includes a locking screw 1 6 and a locking screw 2 7. The two locking screws 2 7 are connected to the locking screw holes 15 of adjacent tool blocks 2. The blades 4 on one tool block 2 are combined into a complete spiral blade shape within a pitch. In this way, continuous splicing and combination of tool blocks can flexibly meet the requirements of different tool axial blade lengths.

[0060] As an optional implementation, the flange 1 is provided with a concave square groove 22 corresponding to the convex square platform 11, and the flange 23 is provided with a convex square platform 21 corresponding to the concave square groove 12. The concave square groove 22 is precisely matched with the convex square platform 11 on the leftmost blade block 2, and is connected to the leftmost blade block 2 by the locking screw 27 through the locking screw hole 15. The convex square platform 21 is precisely matched with the concave square groove 12 on the rightmost blade block 2, and is locked to the locking screw hole 15 on the rightmost blade block 2 by the locking screw 27 through the locking countersunk hole 5; finally, four locking screws 16 are locked to the locking screw hole 15 through the corresponding locking countersunk holes 5, so that the flange 1, the blade block 2, and the flange 23 are connected into a more reliable whole. At the same time, the accurate position of the circumference of the keyway 14 of the flange 1, the blade block 2, and the flange 23 is also guaranteed.

Claims

1. A spiral rotor hobbing tool, characterized in that: It comprises flange 1 (1), a plurality of blade blocks (2), a plurality of blades (4) and flange 2 (3), wherein: Each of the blade blocks (2) is provided with a plurality of screw through holes (23); The flange 1 (1) and the flange 2 (3) are both mounted on the blade block (2) via a plurality of locking screws; The locking screws include locking screw 1 (6) and locking screw 2 (7); Each of the blade blocks (2) is provided with a plurality of blade slots (17); The plurality of blades (4) are installed in corresponding blade grooves (17) in the form of a helical surface; The blade block (2) has a convex square platform (11) at one end and a concave square groove (12) at the other end; The convex square platform 1 (11) and the concave square groove 1 (12) cooperate with each other; Each of the blades (4) is provided with an inner groove (20); The flange 1 (1) is provided with a concave square groove 2 (22) corresponding to the convex square platform 1 (11); The second flange (3) is provided with a second convex square platform (21) corresponding to the first concave square groove (12); The flange one (1), the blade block (2) and the flange two (3) are all provided with corresponding through holes (13), keyways (14) and locking screw holes (15) corresponding to the locking screws.

2. A spiral rotor hobbing tool according to claim 1, characterized in that: Each of the blades (4) is mounted in a blade slot (17) via a clamping screw (8).

3. The spiral rotor hobbing tool according to claim 1, characterized in that: A side positioning surface (16) and a radial positioning surface (18) are provided next to the blade groove (17).

4. The spiral rotor hobbing tool according to claim 1, characterized in that: The blade slot (17) is provided with a blade locking screw hole (19) corresponding to the pressing screw (8).

5. The spiral rotor hobbing tool according to claim 3, characterized in that: It also includes an axial adjustment gasket (9) and a radial adjustment gasket (10) mounted on the side positioning surface (16), wherein the axial adjustment gasket (9) fits with the blade groove (17), and the radial adjustment gasket (10) fits with the inner groove (20) and the positioning surface (18) respectively.

6. A spiral rotor hobbing tool according to claim 2, characterized in that: The axis of the pressing screw (8) and the blade slot (17) form a certain angle.

7. The spiral rotor hobbing tool according to claim 1, characterized in that: The second flange (3) is provided with a locking countersunk hole (5) corresponding to the locking screw.

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