Cutter for machining equidistant screws

Abstract

The utility model discloses a cutter for processing equidistant screws, which comprises a clamping cutter handle clamped on a machine tool. The tool bit is arranged on the clamping tool handle, and one end of the tool bit is fixedly connected with the clamping tool handle. And the blade assembly is arranged at the other end of the tool bit, is symmetrically distributed at the other end of the tool bit, extends to the outer side of the tool bit assembly, is fixedly connected with the tool bit and is used for machining the molded line and the bottom diameter of the screw rod. The blade assembly is used for machining the molded line and the bottom diameter of the screw rod, so that the problem that the profile tolerance consistency is poor due to the tool abrasion problem is effectively solved, the roughness of the surfaces of the molded line and the bottom diameter is smaller, the abrasion resistance, the matching stability and the corrosion resistance of a product are improved, the use performance of the product is improved, human intervention is reduced, and the machining time is saved. And the product quality is more stable.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a tool for machining equidistant screws. Background Technology

[0002] Screw vacuum pumps are important equipment in modern industrial production processes. Their working principle is to use a pair of screws that rotate synchronously at high speed in opposite directions in the pump casing to generate suction and exhaust. They are a replacement product for oil-sealed vacuum pumps and can remove gases containing a large amount of water vapor and a small amount of dust. They are widely used in pharmaceutical, chemical, semiconductor and other industries with high requirements for clean vacuum.

[0003] The equidistant screw is the core component of a screw vacuum pump. During operation, there is no friction between the screws, resulting in smooth operation, low noise, and no need for lubrication in the working chamber. There is a certain gap between the screws. Therefore, dry screw pumps are used in applications requiring the removal of gases containing large amounts of water vapor and small amounts of dust, achieving higher ultimate vacuum and meeting the requirements of cleanliness, oil-free operation, and corrosion resistance. Thus, the precision of the equidistant screw directly affects the performance of the vacuum pump. However, in current manufacturing processes, tool wear during processing cannot guarantee the consistency of the equidistant screw profile. This necessitates manual intervention to adjust the program and compensate for tool wear to ensure the product's profile accuracy. This manual intervention leads to longer processing cycles and inconsistent quality.

[0004] Therefore, due to tool wear, the poor profile consistency of the screw requires human intervention, which prolongs the processing cycle and leads to unstable quality. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a tool for machining equidistant screws, which processes the profile and bottom diameter of equidistant screws by setting a cutting edge assembly on the tool head.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A cutting tool for machining equidistant screws, comprising:

[0008] The tool holder is clamped and held in place on the machine tool.

[0009] The cutting head is mounted on the clamping handle, with one end fixedly connected to the clamping handle.

[0010] The cutting edge assembly is located at the other end of the cutting head, symmetrically distributed at the other end of the cutting head, and extends to the outside of the cutting head assembly. It is fixedly connected to the cutting head and is used to process the profile and bottom diameter of the screw.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The cutting edge assembly processes the screw profile and bottom diameter, effectively solving the problem of poor contour consistency caused by tool wear. It reduces the surface roughness of the profile and bottom diameter, increases the product's wear resistance, fit stability, and corrosion resistance, improves the product's performance, reduces human intervention, saves processing time, and makes the product quality more stable.

[0013] More preferably, the blade assembly includes:

[0014] The first cutting edge is located at the other end of the cutting head, with one side wall fixedly connected to the cutting head, and the working end face extending to the outside of the end face of the cutting head.

[0015] The second cutting edge is located at the other end of the cutting head, opposite to the position of the first cutting edge. One side wall of the second cutting edge is fixedly connected to the cutting head, and its working end face is on the same plane as the working end face of the first cutting edge. The first and second cutting edges are used to process the profile and bottom diameter of the screw.

[0016] By adopting the above technical solution, the bottom diameter and profile of the equidistant screw are processed by the first and second cutting edges, which reduces the surface roughness of the profile and bottom diameter and improves the consistency of the contour.

[0017] A further preferred embodiment is that the bottom wall of both the first and second cutting edges is a 1 / 4 circular arc surface.

[0018] By adopting the above technical solution, it is ensured that the weld can be firmly attached to the cutter head.

[0019] More preferably, the working end of the cutter head has two cutting grooves, which are symmetrically arranged. The bottom surface of the cutting groove is a 1 / 4 arc surface, and the first cutting edge and the second cutting edge are located in the two cutting grooves respectively.

[0020] Using the above technical solution, the bottom surfaces of the two cutting edge grooves are respectively welded to the bottom walls of the first cutting edge and the second cutting edge via arc surface welding.

[0021] Further optimization involves welding the sidewall of the first cutting edge to the inner sidewall of a cutting edge groove, welding the bottom wall of the first cutting edge to the bottom wall of a cutting edge groove, welding the sidewall of the second cutting edge to the inner sidewall of another cutting edge groove, and welding the bottom wall of the second cutting edge to the bottom wall of another cutting edge groove.

[0022] By adopting the above technical solution, the first and second cutting edges are firmly welded into the cutting edge groove, thereby improving the strength of the cutting head.

[0023] Further optimization involves both the working end faces of the first and second cutting edges being right-angled trapezoids, with the inclined surfaces of the first and second cutting edges extending beyond the outer side of the blade head's end face.

[0024] Using the above technical solution, the first and second cutting edges, which are right-angled trapezoids, can fit completely with the cutting edge groove, can be firmly connected together, and can smoothly process the bottom diameter and profile of the equidistant screw on the outside of the cutting head.

[0025] A further optimization is that the angle between the end face of the first cutting edge along the cutting head direction and the end face of the second cutting edge along the cutting head direction is an obtuse angle.

[0026] Further optimization involves ensuring that the lengths of both the first and second cutting edges are greater than the length of the cutting groove.

[0027] By adopting the above technical solution, it is ensured that the bottom diameter and profile can be smoothly machined between adjacent wheels in the equidistant screw, thereby improving the consistency of the profile.

[0028] Further optimization involves using carbide to hold the tool handle.

[0029] The above technical solution provides a tool holder with high hardness and high strength.

[0030] Further optimization involves using cubic boron nitride as the material for the first and second cutting edges.

[0031] By adopting the above technical solution, the blade assembly has excellent hardness, strength, wear resistance and corrosion resistance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0033] Figure 2 This is a schematic diagram of the cutter head in this embodiment.

[0034] Figure 3 This is a side view of the cutter head in this embodiment.

[0035] Figure 4 This is a front view schematic diagram of the cutter head in this embodiment.

[0036] Figure 5 This is a schematic diagram of the equidistant screw in this embodiment.

[0037] Figure 6 This is a schematic diagram of the blade groove in this embodiment.

[0038] Reference numerals: 1-Clamping handle; 2-Cutter head; 21-Cutting groove; 3-Cutting assembly; 31-First cutting edge; 32-Second cutting edge; 4-Equally spaced screw; 41-Bottom diameter; 42-Profile. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-6 This utility model will be described in further detail.

[0040] A tool for machining equidistant screws, such as Figure 1 As shown, it includes:

[0041] Tool holder 1, which is clamped on the machine tool, is made of cemented carbide.

[0042] The cutting head 2 is mounted on the clamping handle 1, and one end of it is fixedly connected to the clamping handle 1.

[0043] The cutting edge assembly 3 is located at the other end of the cutting head 2, symmetrically distributed at the other end of the cutting head 2, and extends to the outside of the cutting head 2 assembly. It is fixedly connected to the cutting head 2 and is used to process the profile 42 and the bottom diameter 41 of the screw.

[0044] The cutting edge assembly 3 processes the screw profile 42 and the bottom diameter 41, effectively solving the problem of poor contour consistency caused by tool wear. This results in less surface roughness on the profile 42 and the bottom diameter 41, increasing the product's wear resistance, fit stability, and corrosion resistance. It also improves the product's performance, reduces human intervention, saves processing time, and makes the product quality more stable.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the blade assembly 3 includes:

[0046] The first cutting edge 31 is located at the other end of the cutting head 2, with one side wall fixedly connected to the cutting head 2, and the working end face extending to the outside of the end face of the cutting head 2.

[0047] The second cutting edge 32 is located at the other end of the cutting head 2, opposite to the position of the first cutting edge 31. One side wall of the second cutting edge 32 is fixedly connected to the cutting head 2. Its working end face is on the same plane as the working end face of the first cutting edge 31. The first cutting edge 31 and the second cutting edge 32 are used to process the profile and bottom diameter 41 of the screw.

[0048] The bottom diameter 41 and profile 42 of the equidistant screw 4 are machined by the first cutting edge 31 and the second cutting edge 32, which reduces the surface roughness of the profile 42 and the bottom diameter 41 and improves the consistency of the profile.

[0049] Specifically, such as Figure 1 , Figure 3 as well as Figure 6 As shown, in this embodiment, the bottom wall of the first blade 31 and the bottom wall of the second blade 32 are both 1 / 4 arc surfaces to ensure that they can be firmly welded to the blade head 2.

[0050] Specifically, such as Figure 1 and Figure 2As shown, in this embodiment, the working end of the cutter head 2 is provided with two cutting grooves 21. The two cutting grooves 21 are symmetrically arranged. The bottom surface of the cutting groove 21 is a 1 / 4 arc surface. The first cutting edge 31 and the second cutting edge 32 are respectively located in the two cutting grooves 21. The bottom surface of the two cutting grooves 21 is welded to the bottom wall of the first cutting edge 31 and the bottom wall of the second cutting edge 32 through the arc surface.

[0051] Specifically, such as Figure 2 , Figure 3 as well as Figure 4 As shown, in this embodiment, the side wall of the first cutting edge 31 is welded to the inner side wall of a cutting edge groove 21, the bottom wall of the first cutting edge 31 is welded to the bottom wall of a cutting edge groove 21, the side wall of the second cutting edge 32 is welded to the inner side wall of another cutting edge groove 21, and the bottom wall of the second cutting edge 32 is welded to the bottom wall of another cutting edge groove 21, so that the first cutting edge 31 and the second cutting edge 32 are firmly welded in the cutting edge groove 21, thereby improving the strength of the cutting head 2.

[0052] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, the working end face of the first cutting edge 31 and the working end face of the second cutting edge 32 are both right-angled trapezoids. The inclined surfaces of the first cutting edge 31 and the second cutting edge 32 extend outward from the end face of the cutter head 2. The right-angled trapezoidal first cutting edge 31 and the second cutting edge 32 can fit completely into the cutting edge groove 21 and be firmly connected together. They can also smoothly process the bottom diameter 41 and profile 42 of the equidistant screw 4 on the outside of the cutter head 2.

[0053] Specifically, such as Figure 2 , Figure 3 , Figure 4 As shown, in this embodiment, the angle between the end face of the first blade 31 along the direction of the blade head 2 and the end face of the second blade 32 along the direction of the blade head 2 is an obtuse angle.

[0054] Specifically, such as Figure 4 and Figure 5 As shown, in this embodiment, the lengths of the first cutting edge 31 and the second cutting edge 32 are both greater than the length of the cutting edge groove 21, ensuring that the bottom diameter 41 and profile 42 can be smoothly machined between adjacent wheels in the equidistant screw 4, thereby improving the consistency of the contour.

[0055] Specifically, such as Figure 4 and Figure 5 As shown, the tool holder 1 is made of cemented carbide, and the tool holder 1 has the characteristics of high hardness and high strength.

[0056] Specifically, such as Figure 2 As shown, the first cutting edge 31 and the second cutting edge 32 are made of cubic boron nitride, which gives the cutting edge assembly 3 excellent hardness, strength, wear resistance and corrosion resistance.

[0057] In summary, the non-standard cutting tool composed of the first cutting edge 31 and the second cutting edge 32, made of artificial cubic boron nitride, possesses characteristics of high hardness, wear resistance, high strength, heat resistance, and corrosion resistance. During the machining process, as the equidistant screw 4 rotates at high speed, the first cutting edge 31 and the second cutting edge 32 cut between adjacent wheel surfaces on the screw, enabling the machining of profile 42 and the surface of the bottom diameter 41 with smaller roughness. This improves the consistency of the profile of the equidistant screw 4, reduces the number of human interventions during machining, and improves machining efficiency and the stability of the quality of the equidistant screw 4.

[0058] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A cutting tool for machining equidistant screws, characterized in that, include: The tool holder (1) is clamped on the machine tool; The cutting head (2) is set on the clamping handle (1), and one end of it is fixedly connected to the clamping handle (1); The cutting edge assembly (3) is disposed at the other end of the cutting head (2), symmetrically distributed at the other end of the cutting head (2), and extends to the outside of the cutting head (2) assembly, and is fixedly connected to the cutting head (2), for processing the profile (42) and bottom diameter (41) of the screw.

2. The cutting tool for machining equidistant screws according to claim 1, characterized in that, The blade assembly (3) includes: The first cutting edge (31) is located at the other end of the cutting head (2), with one side wall fixedly connected to the cutting head (2), and the working end face extending to the outside of the end face of the cutting head (2); The second cutting edge (32) is located at the other end of the cutter head (2) and is opposite to the position of the first cutting edge (31). One side wall of the second cutting edge (32) is fixedly connected to the cutter head (2), and its working end face is on the same plane as the working end face of the first cutting edge (31). The first cutting edge (31) and the second cutting edge (32) are used to process the profile and bottom diameter (41) of the screw.

3. The cutting tool for machining equidistant screws according to claim 2, characterized in that, The bottom wall of the first blade (31) and the bottom wall of the second blade (32) are both 1 / 4 arc surfaces.

4. The cutting tool for machining equidistant screws according to claim 2, characterized in that, The working end of the cutter head (2) is provided with two cutting edge grooves (21), which are arranged symmetrically. The bottom surface of the cutting edge groove (21) is a 1 / 4 arc surface. The first cutting edge (31) and the second cutting edge (32) are respectively located in the two cutting edge grooves (21).

5. The cutting tool for machining equidistant screws according to claim 4, characterized in that, The sidewall of the first blade (31) is welded to the inner sidewall of one of the blade grooves (21), the bottom wall of the first blade (31) is welded to the bottom wall of one of the blade grooves (21), the sidewall of the second blade (32) is welded to the inner sidewall of another blade groove (21), and the bottom wall of the second blade (32) is welded to the bottom wall of another blade groove (21).

6. The cutting tool for machining equidistant screws according to claim 4, characterized in that, The working end face of the first blade (31) and the working end face of the second blade (32) are both right-angled trapezoids, and the inclined surface of the first blade (31) and the inclined surface of the second blade (32) extend outward from the end face of the blade head (2).

7. The cutting tool for machining equidistant screws according to claim 2, characterized in that, The angle between the end face of the first cutting edge (31) along the direction of the blade head (2) and the end face of the second cutting edge (32) along the direction of the blade head (2) is an obtuse angle.

8. The cutting tool for machining equidistant screws according to claim 4, characterized in that, The length of the first blade (31) and the length of the second blade (32) are both greater than the length of the blade groove (21).

9. The cutting tool for machining equidistant screws according to claim 1, characterized in that, The clamping handle (1) is made of cemented carbide.

10. The cutting tool for machining equidistant screws according to claim 2, characterized in that, The first cutting edge (31) and the second cutting edge (32) are made of cubic boron nitride.

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