Novel mechanically-clamped reaming cutter suitable for hydraulic valve machining

Abstract

The utility model discloses a novel mechanically-clamped chambering cutter suitable for hydraulic valve machining, which belongs to the technical field of cutting tools and comprises a cutter handle, a second cutter body and a first cutter body are sequentially, concentrically and fixedly connected to one side of the cutter handle, the second cutter body and the first cutter body are cylindrical, and the radial size of the second cutter body is larger than that of the first cutter body. Through cooling holes are formed in central shafts of the cutter handle, the first cutter body and the second cutter body, a first blade is fixedly connected to the bottom of the first cutter body, a second blade is fixedly connected to one side of the bottom of the first cutter body, a third blade is fixedly connected to one side of the lower end of the second cutter body, and a fourth blade is fixedly connected to the other side of the lower end of the second cutter body. The utility model has the advantage that chips are easy to break.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a new type of machine-clamped reaming cutter suitable for machining of hydraulic valves. 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, a 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 broaches for machining.

[0004] Chinese Patent CN211889262U discloses an internally cooled stepped broach, which includes a first broach column, a first mating port, a second mating port, an oil groove, a second broach column, a docking column, broach blades, a bayonet, a first oil outlet and a second oil outlet. The first broach column, the second broach column, the docking column and the broach blades together form the main structure of the internally cooled stepped broach, and the total length is 170 mm. Through the specific length of the combined type, the use length standard of the stepped broach is achieved. The inclination of the bayonet is 70 degrees. Through the specific accuracy, the cutting accuracy is guaranteed. The diameter of the broach blade is 8.5 mm, reaching the standard cutting hole diameter. The first broach column, the second broach column and the docking column are provided with hollow pipes inside and are on a straight line to ensure the smooth penetration of the oil. Both the first oil outlet and the second oil outlet are connected to the oil groove through the hollow pipes to ensure that the oil can overflow smoothly when the stepped broach is working.

[0005] During the use process, it is found that it has the following deficiencies: 1. For an internally cooled stepped broach, there are annular iron chips in the machining process; 2. For an internally cooled stepped broach, it is easy to break the tool, which is not conducive to market promotion. Summary of the Invention

[0006] The utility model aims to solve the technical problems mentioned in the above background technique, and provides a new type of machine-clamped reaming cutter suitable for machining of hydraulic valves, which forms multi-stage cutting, expands the hole into shape and achieves the chip breaking effect.

[0007] To achieve the above object, the technical solution provided by the present utility model is: a new type of machine - clamped reaming cutter applicable to the machining of hydraulic valves, including a tool shank. On one side of the tool shank, a second cutter body and a first cutter body are fixedly connected concentrically in sequence. The second cutter body and the first cutter body are in a columnar shape, and the radial dimension of the second cutter body is larger than that of the first cutter body. A cooling hole runs through the central axes of the tool shank, the first cutter body, and the second cutter body. At the bottom of the first cutter body, a first cutting blade is fixedly connected. On one side at the bottom of the first cutter body, a second cutting blade is fixedly connected. On one side at the lower end of the second cutter body, a third cutting blade is fixedly connected. On the other side at the lower end of the second cutter body, a fourth cutting blade is fixedly connected.

[0008] In some embodiments, a first positioning groove is provided at the bottom of the first cutter body. The first cutting blade is locked in the first positioning groove by a blade screw, and the cutting edge of the first cutting blade extends along the radial direction of the first cutter body.

[0009] In some embodiments, on the radial side at the bottom of the first cutter body, a second positioning groove is provided. The second cutting blade is locked in the second positioning groove by a blade screw. The cutting edge of the second cutting blade extends along the radial direction of the first cutter body, and the outer side of its cutting edge extends out of the first cutter body and inclines upward.

[0010] In some embodiments, the aperture for the second cutting blade to perform rotary reaming is 24.5 mm, and its dimensional deviation is ±0.05 mm.

[0011] In some embodiments, on the radial side at the bottom of the second cutter body, a fourth positioning groove is provided. The fourth cutting blade is locked in the fourth positioning groove by a blade screw. The fourth cutting blade is quadrilateral, and its cutting edge extends along the radial direction of the second cutter body and inclines upward by 45°.

[0012] In some embodiments, the dimension for the fourth cutting blade to perform rotary reaming is 26.6 mm, and its dimensional deviation is ±0.05 mm.

[0013] In some embodiments, on the radial side at the bottom of the second cutter body, a third positioning groove is provided. The third cutting blade is locked in the third positioning groove by a blade screw. The third cutting blade is quadrilateral, and its cutting edge extends out of the side of the second cutter body and extends along the radial direction of the second cutter body.

[0014] In some embodiments, the dimension for the third cutting blade to perform rotary reaming is 38 mm, and its dimensional deviation is ±0.05 mm.

[0015] The advantages of the present utility model compared with the prior art are as follows: 1. The forming tool body part is designed as a multi-step forming reaming tool. The first blade, the second blade, the third blade, and the fourth blade reasonably distribute the machining allowance to form multi-stage cutting, achieving the chip breaking effect; 2. The first blade, the second blade, the third blade, and the fourth blade are locked on the tool body by blade screws. The tool body has a long service life, and only the corresponding blades need to be replaced subsequently, reducing the tool procurement cost; 3. The first tool body, the second tool body, and the tool handle are coaxially connected to ensure that the reaming coaxiality ≤ φ0.02mm.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the reaming tool according to an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the hole machined by the rotation of the reaming tool shown in

[0019] In the drawings: 1. The first blade; 2. The second blade; 3. The third blade; 4. The fourth blade; 5. The tool handle; 6. The first tool body; 7. The second tool body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further elaborates on the present utility model in detail.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not intended to limit the scope of the present utility model.

[0022] Combined with Figure 1 shown, the first blade 1 is a center reaming blade, and the second blade 2, the third blade 3, and the fourth blade 4 are step reaming blades.

[0023] The bottom of the first tool body 6 is fixedly connected with the first blade 1 by a blade screw, one side of the bottom of the first tool body 6 is fixedly connected with the second blade 2 by a blade screw, one side of the lower end of the second tool body 7 is fixedly connected with the third blade 3 by a blade screw, and the other side of the lower end of the second tool body 7 is fixedly connected with the fourth blade 4 by a blade screw.

[0024] Combined with Figure 2As shown, the cutting edge of the first blade 1 extends along the radial direction of the first tool body 6, and the cutting edge of the second blade 2 extends along the radial direction of the first tool body 6, and the outer side of its cutting edge extends out of the first tool body 6 and inclines upward. The aperture size of the hole reaming processed by the rotation of the second blade 2 is 24.5 mm, and its dimensional deviation is ±0.05 mm.

[0025] The fourth blade 4 is quadrilateral, its cutting edge extends along the radial direction of the second tool body 7 and inclines upward by 45°, the size of the hole reaming processed by the rotation of the fourth blade 4 is 26.6 mm, and its dimensional deviation is ±0.05 mm. The third blade 3 is quadrilateral, its cutting edge extends out of the side of the second tool body 7 and extends along the radial direction of the second tool body 7. The size of the hole reaming processed by the rotation of the third blade 3 is 38 mm, and its dimensional deviation is ±0.05 mm.

[0026] Internal cooling holes are designed inside the tool handle 5, the first tool body 6, and the second tool body 7. The cooling water flushes the bottom of the hole, which can effectively remove the iron chips generated during the machining process in a timely manner.

[0027] The formed parts of the first tool body 6 and the second tool body 7 are designed as multi-step forming reaming cutters. The first blade 1, the second blade 2, the fourth blade 4, and the third blade 3 reasonably distribute the machining allowance to form multi-stage cutting, which helps to break the chips and avoid forming annular chips.

[0028] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A new type of machine - clamped reaming cutter applicable to the machining of hydraulic valves, comprising a tool shank (5), characterized in that: On one side of the tool shank (5), a second tool body (7) and a first tool body (6) are fixedly connected concentrically in sequence. The second tool body (7) and the first tool body (6) are in a cylindrical shape, and the radial dimension of the second tool body (7) is larger than that of the first tool body (6). A cooling hole penetrating through is provided on the central axis of the tool shank (5), the first tool body (6), and the second tool body (7). A first cutting blade (1) is fixedly connected to the bottom of the first tool body (6), a second cutting blade (2) is fixedly connected to one side at the bottom of the first tool body (6), a third cutting blade (3) is fixedly connected to one side at the lower end of the second tool body (7), and a fourth cutting blade (4) is fixedly connected to the other side at the lower end of the second tool body (7).

2. The novel indexable hole expanding tool applicable to the machining of hydraulic valves according to claim 1, wherein: A first positioning groove is provided at the bottom of the first tool body (6). The first cutting blade (1) is locked in the first positioning groove by a blade screw. The cutting edge of the first cutting blade (1) extends along the radial direction of the first tool body (6).

3. The novel indexable reamer applicable to the machining of hydraulic valves according to claim 1, characterized in that: A second positioning groove is provided on the radial side at the bottom of the first tool body (6). The second cutting blade (2) is locked in the second positioning groove by a blade screw. The cutting edge of the second cutting blade (2) extends along the radial direction of the first tool body (6), and the outer side of its cutting edge extends out of the first tool body (6) and inclines upward.

4. The new indexable reamer applicable to the machining of hydraulic valves according to claim 3, wherein: The aperture of the hole processed by rotary reaming of the second cutting blade (2) is 24.5 mm, and its dimensional deviation is ±0.05 mm.

5. The novel indexable hole expanding cutter applicable to the machining of hydraulic valves according to claim 1, characterized in that: A fourth positioning groove is provided on the radial side at the bottom of the second tool body (7). The fourth cutting blade (4) is locked in the fourth positioning groove by a blade screw. The fourth cutting blade (4) is quadrilateral, and its cutting edge extends along the radial direction of the second tool body (7) and inclines upward by 45°.

6. The new indexable reamer applicable to the machining of hydraulic valves according to claim 5, characterized in that: The size of the hole processed by rotary reaming of the fourth cutting blade (4) is 26.6 mm, and its dimensional deviation is ±0.05 mm.

7. The new indexable reamer applicable to the machining of hydraulic valves according to claim 1, characterized in that: A third positioning groove is provided on the radial side at the bottom of the second tool body (7). The third cutting blade (3) is locked in the third positioning groove by a blade screw. The third cutting blade (3) is quadrilateral, and its cutting edge extends out of the side of the second tool body (7) and extends along the radial direction of the second tool body (7).

8. The new indexable reamer applicable to the machining of hydraulic valves according to claim 7, characterized in that: The size of the hole processed by rotary reaming of the third cutting blade (3) is 38 mm, and its dimensional deviation is ±0.05 mm.

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