Multi-edge reamer suitable for valve element hole machining

Abstract

The utility model discloses a multi-cutting-edge reamer suitable for valve element hole machining. The multi-cutting-edge reamer comprises a reamer head part, a reamer rod part and a reamer handle part. The whole tool bit part is a cylinder, a plurality of spiral grooves are evenly formed in the radial outer circumferential face of the tool bit part at intervals in the whole circumferential direction, and then the welding tool bit is of a multi-blade spiral structure. The whole cutter bar part is a cylinder, a plurality of linear guide strips are uniformly arranged on the radial outer circumferential surface of the cutter bar part at intervals in the whole circumferential direction, and the guide strips need to transversely penetrate through the neutral position of a valve element hole and can be supported to 2-3 steps of the valve element hole; the whole cutter handle part is a cylinder, and the cutter handle part, the cutter head part and the cutter bar part jointly form a coaxial cylinder with the same central axis as the center. According to the multi-way valve machining tool, the machining efficiency is improved, the tool purchasing cost is reduced, and the multi-way valve machining tool has good applicability to machining of various multi-way valves.

Description

Technical Field

[0001] The utility model relates to a multi-edge reamer applicable to the machining of spool holes, belonging to the technical field of reamers. Background Technique

[0002] The hydraulic multi-way valve is the core control component of the hydraulic system of construction machinery, and the valve body is the core component. At present, the casting structure is mostly adopted. Among them, for the casting valve body with a spool structure, the machining quality of the spool hole, cartridge valve hole, etc. directly affects the working performance and service life of the hydraulic multi-way valve, while the machining cost directly affects the competitiveness of the product in the market. At present, many foreign manufacturers have realized the mass production of casting valve bodies with high efficiency and low cost, and are developing towards the direction of high efficiency, high integration, intelligence and flexibility.

[0003] The machining accuracy of the spool hole is high. Before machining, it is mostly a casting hole. The general machining method is to use general tools such as drills, reaming cutters, and reamers for machining. It not only cannot guarantee the coaxiality, hole diameter tolerance and roughness, but also there are annular iron chips.

[0004] The existing patent discloses an internal cooling stepped reamer (publication number: CN111014825A), and this technology has the following deficiencies:

[0005] 1. For the internal cooling stepped reamer mentioned in the patent, there are annular iron chips in the machining process;

[0006] 2. For the internal cooling stepped reamer described in the patent, the tool is easy to break, which is not conducive to market promotion. Summary of the Invention

[0007] In view of the deficiencies of the existing technology, the utility model provides a multi-edge reamer applicable to the machining of spool holes, which not only improves the machining efficiency, but also reduces the tool procurement cost, and has good applicability to the machining of various multi-way valves.

[0008] The utility model is realized according to the following technical solutions:

[0009] A multi-edge reamer applicable to the machining of spool holes, comprising:

[0010] The cutter head part is a cylinder as a whole, and a plurality of spiral grooves are evenly arranged on its radial outer peripheral surface along the entire circumference, so that the cutter head part forms a multi-edge spiral structure;

[0011] The cutter rod part is a cylinder as a whole, and a plurality of straight guide bars are evenly arranged on its radial outer peripheral surface along the entire circumference, and the length of the guide bar is required to cross the empty space of the spool hole and can support 2-3 spool hole steps;

[0012] The handle part is a cylinder as a whole, and together with the cutter head part and the cutter bar part, it forms coaxial cylinders centered on the same central axis.

[0013] In some embodiments, a six-edge spiral structure is formed by providing six spiral grooves on the radially outer peripheral surface of the cutter head part.

[0014] In some embodiments, six straight guide strips are provided on the radially outer peripheral surface of the cutter bar part.

[0015] In some embodiments, both end faces of the guide strip in the length direction thereof are provided as inclined surfaces.

[0016] In some embodiments, the angle of the inclined surface is set to 20 degrees.

[0017] In some embodiments, the upper surface of the guide strip is 0.01 mm lower than the cutter head part.

[0018] In some embodiments, the cutter head part is a stepped cylinder with a narrow front end and a wide rear end, and the front diameter of the cutter head part is 0.3 mm smaller than the rear diameter. On the one hand, it is used to support and guide the entire multi-edge reamer, and on the other hand, it is used for reaming and correction.

[0019] In some embodiments, the coaxial cylinder formed by the handle part, the cutter bar part, and the cutter head part is provided with an axial central through hole for injecting coolant from the handle part to the cutter head part to prevent the temperature of the cutter head part from being too high during reaming.

[0020] In some embodiments, the cutter head part and the cutter bar part are welded together; the guide strip and the cutter bar part are welded together.

[0021] Advantages of the present utility model:

[0022] 1. Facilitate drilling and chip removal: The cutter head part is designed in a multi-edge spiral form, and multiple edges participate in reaming simultaneously, improving the stability of reaming and the service life of the tool.

[0023] 2. Good reaming effect for supporting the spool hole: The carbide guide strip is symmetrically welded in a ring on the upper surface of the cutter bar part and is 0.01 mm lower than the cutter head part. The length of the guide strip is required to cross the empty space of the spool hole and can support 2-3 spool hole steps, improving the rigidity of the tool and playing a role in guiding the strip to support the reaming of the spool hole.

[0024] The present utility model not only improves the processing efficiency but also reduces the tool procurement cost, has good applicability to various multi-way valve machining, and has certain reference significance for peer enterprises in the hydraulic valve manufacturing industry. Description of the Drawings

[0025] The accompanying drawings, as part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] In the accompanying drawings:

[0027] Figure 1 It is an overall schematic diagram of a multi-edge reamer applicable to the machining of the valve core hole of the present utility model;

[0028] Figure 2 It is a schematic cross-sectional view of the cutter head part of the present utility model;

[0029] Figure 3 It is a schematic cross-sectional view of the tool shank part of the present utility model.

[0030] Reference signs in the drawings: 1 - cutter head part, 2 - guide bar, 3 - tool shank part, 4 - tool holder part, 5 - central through hole.

[0031] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific embodiments

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] As Figure 1 shown, the present utility model provides a multi-edge reamer applicable to the machining of valve core holes, including a cutter head part 1, a cutter rod part 3, and a tool handle part 4; the cutter head part 1 is a cylinder as a whole, and on its radial outer circumferential surface and along the entire circumference, a plurality of spiral grooves are evenly arranged at intervals, thereby forming a multi-edge spiral structure for the cutter head part 1; the cutter rod part 3 is a cylinder as a whole, and on its radial outer circumferential surface and along the entire circumference, a plurality of straight guide strips 2 are evenly arranged at intervals, and the length of the guide strip 2 is required to cross the empty space of the valve core hole and be able to support 2-3 valve core hole steps; the tool handle part 4 is a cylinder as a whole, and together with the cutter head part 1 and the cutter rod part 3, it forms a coaxial cylinder centered on the same central axis.

[0036] A further solution is as Figure 1 、 Figure 2 shown, on the radial outer circumferential surface of the cutter head part 1, a six-edge spiral structure is formed by arranging six spiral grooves, and multiple edges participate in reaming simultaneously, improving the stability of reaming and the service life of the tool.

[0037] A further solution is as Figure 1 、 Figure 3 shown, six straight guide strips are arranged on the radial outer circumferential surface of the cutter rod part 3.

[0038] A further solution is as Figure 1 shown, both end faces of the guide strip 2 along its length direction are set as inclined planes. The angle of the inclined plane is set to 20 degrees.

[0039] A further solution is as Figure 1 shown, the guide strip 2 is a cemented carbide guide strip, which is symmetrically welded on the upper surface of the cutter rod part 3 and is 0.01 mm lower than the cutter head part. The length of the welded guide strip is required to cross the empty space of the valve core hole and be able to support 2-3 valve core hole steps, improving the rigidity of the tool and playing a role in guiding the reaming of the valve core hole by the guide strip.

[0040] A further solution is as Figure 1 shown, the cutter head part 1 is a stepped cylinder with a narrow front end and a wide rear end, and the front end diameter of the cutter head part 1 is 0.3 mm smaller than the rear end diameter. On the one hand, it is used to support and guide the entire multi-edge reamer, and on the other hand, it is used for reaming and correction to reduce the runout of the rear part of the cutter head part during reaming.

[0041] A further solution, such as Figure 1 shown, the coaxial cylinder formed by the tool shank part 4, the tool bar part 3, and the tool tip part 1 is provided with an axial central through hole 5 for injecting coolant from the tool shank part 4 to the tool tip part 1 to prevent the tool tip part 1 from overheating during reaming.

[0042] A further solution, such as Figure 1 shown, the tool tip part 1 and the tool bar part 3 are welded together.

[0043] In summary, the present utility model provides a multi-edge reamer applicable to the machining of valve spool holes. In order to facilitate drilling and discharging iron chips, the tool tip part is designed in a multi-edge spiral form, and multiple edges participate in reaming simultaneously, improving the stability of reaming and the service life of the tool; the tool tip part is designed as a stepped cylinder with a narrow front end and a wide rear end, and the front end diameter of the tool tip part is 0.3 mm smaller than the rear end diameter. In addition to the main support and guidance, the front end of the tool tip part also needs to perform partial reaming correction to reduce the runout of the rear part of the tool tip part during reaming; the carbide guide strips are symmetrically welded to the upper surface of the tool bar part and are 0.01 mm lower than the tool tip part. The length of the welded guide strips is required to cross the gap of the valve spool hole and support 2 - 3 steps of the valve spool hole, improving the rigidity of the tool and playing a role in guiding the reaming of the valve spool hole. The present utility model not only improves the processing efficiency but also reduces the tool procurement cost, has good applicability to the machining of various multi-way valves, and has certain reference significance for peer enterprises in the hydraulic valve manufacturing industry.

[0044] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0045] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments rather than other features, the combination of features of different embodiments also means being within the protection scope of the present utility model and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0046] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A multi-edge reamer applicable to machining of valve core holes, characterized in that, Comprising: The cutter head part, which is a cylinder as a whole, and on its radial outer peripheral surface and along the entire circumference, a plurality of spiral grooves are evenly spaced, thereby forming a multi-edge spiral structure for the cutter head part; The cutter bar part, which is a cylinder as a whole, and on its radial outer peripheral surface and along the entire circumference, a plurality of linear guide bars are evenly spaced, and the length of the guide bar is required to cross the empty space of the valve core hole and be able to reach 2-3 valve core hole steps; The handle part, which is a cylinder as a whole, and together with the cutter head part and the cutter bar part, forms a coaxial cylinder centered on the same central axis.

2. The multi-edge reamer applicable to the machining of valve core holes according to claim 1, wherein: On the radial outer peripheral surface of the cutter head part, a six-edge spiral structure is formed by six spiral grooves.

3. The multi-edge reamer applicable to the machining of valve core holes according to claim 1, wherein: Six linear guide bars are provided on the radial outer peripheral surface of the cutter bar part.

4. The multi-edge reamer applicable to the machining of valve core holes according to claim 1, wherein: Both end faces of the guide bar along its length direction are set as inclined planes.

5. The multi-edge reamer applicable to machining of valve core holes according to claim 4, wherein: The angle of the inclined plane is set to 20 degrees.

6. A multi-edge reamer applicable to machining of valve core holes according to claim 1, characterized in that: The upper surface of the guide bar is 0.01 mm lower than the cutter head part.

7. A multi-edge reamer applicable to the machining of valve core holes according to claim 1, characterized in that: The cutter head part is a stepped cylinder with a narrow front end and a wide rear end, and the front diameter of the cutter head part is 0.3 mm smaller than the rear diameter. On the one hand, it is used to support and guide the entire multi-edge reamer, and on the other hand, it is used for reaming and correction.

8. A multi-edge reamer applicable to machining of valve core holes according to claim 1, characterized in that: An axial central through hole is provided in the coaxial cylinder formed by the handle part, the cutter bar part, and the cutter head part, for injecting coolant from the handle part to the cutter head part to prevent the temperature of the cutter head part from being too high during reaming.

9. A multi-edge reamer applicable to machining of valve core holes according to claim 1, characterized in that: The cutter head part and the cutter bar part are welded together; the guide bar and the cutter bar part are welded together.

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