A wear-resistant multi-blade honing knife

Abstract

This utility model discloses a wear-resistant multi-blade honing cutter, including a cutter body. The surface of the cutter body is shaped like two sections of a cylindrical tube with different radii. The surface of the cutter body is provided with external threads. The surface of the cutter body is provided with two main and secondary cutting edges. A filter section is fixedly provided on one side of the main cutting edge. A tapered section is provided at the front end of the cutter body. A guide section is provided at the front end of the tapered section. The surface of the filter section is inclined and has several wear-resistant protrusions. This utility model adopts a two-section cylindrical cutter body. The front end is provided with a tapered section and a guide section in sequence. The contact blocks evenly distributed on the surface of the guide section can ensure the coaxiality of the cutter and the machining hole. The design of its side diameter being the same as the end face area of ​​the tapered section effectively reduces the initial contact stress and avoids the hole opening deviation. The main and secondary cutting edges are combined with spiral and straight chip removal grooves. The spiral chip removal groove located in the connection area of ​​the filter section uses centrifugal force to discharge chips along the spiral trajectory, preventing chip blockage and affecting the surface roughness of the machined surface.

Description

Technical Field

[0001] This utility model relates to the field of honing tools, and in particular to a wear-resistant multi-blade honing tool. Background Technology

[0002] Honing (including honing and reaming) is a finishing process that uses honing tools to finish the surface of a workpiece. During honing, the workpiece is mounted on the honing machine table or in a special fixture. The honing tool is inserted into the pre-machined hole, and the machine tool spindle drives the honing tool to rotate and reciprocate axially. The honing strips on the honing tool contact the wall of the hole to be machined with a certain pressure, thus removing a very thin layer of metal.

[0003] Traditional machining methods use single-edged reamers or separate honing tools, which suffer from unbalanced cutting forces due to their single-edged structure. This can easily cause "chatter" during deep hole machining, leading to excessive hole wall roughness. Furthermore, the chip removal groove structure is simple, and when machining tough materials, chips can become entangled in the tool, causing safety accidents.

[0004] Therefore, we propose a wear-resistant multi-blade honing tool. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a wear-resistant multi-blade honing tool.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wear-resistant multi-blade honing cutter includes a blade body. The surface of the blade body is shaped like two sections of cylindrical tubes with different radii. The surface of the blade body has external threads and two main and secondary cutting edges. A filter section is fixedly provided on the side of the main cutting edge away from the end face of the blade body. The front end of the blade body has a tapered section, and the front end of the tapered section has a guide section. The surface of the filter section is inclined and has several wear-resistant protrusions. It is worth noting that the wear-resistant protrusions should be made of cemented carbide or ceramic coating. This allows only the front end module of the blade body to be replaced after wear, rather than the entire blade body being scrapped. At the same time, because the surface of the blade body is shaped like two sections of cylindrical tubes with different radii, it is more suitable for the transition stage of the inner wall of the irregular inner hole during operation, avoiding the complete scrapping due to direct contact with the blade.

[0007] As a further improvement of this utility model: a connecting sleeve is movably provided on one side of the blade body. The connecting sleeve is in the shape of a round tube and has a connecting hole on its end face. A rubber pad tube is provided at the other end of the connecting sleeve. A blade handle is fixedly provided on the other side of the connecting sleeve. A rubber pad tube is provided at the end face of the connecting sleeve. In the internal control operation of installing the blade handle, a certain amount of blade vibration can be reduced, and the direct damage caused by stress contact between the transmission device, the processing components and the blade can be reduced.

[0008] As a further improvement of this utility model: the knife handle is engaged with the connecting sleeve, and a number of positioning grooves are provided on the surface of the knife handle. The positioning grooves are used to lock the knife handle and the connecting sleeve, so that the rubber pad tube forms a stable transition.

[0009] As a further improvement of this utility model: the surfaces of the main and secondary cutting edges are provided with several chip removal grooves extending along their axial direction, and the surface of the tapered section is provided with several extended notches.

[0010] As a further improvement of this utility model: the chip removal grooves on the surfaces of the main and secondary cutting edges connected to the filter section are spiral-shaped, and the extended notch and another part of the chip removal grooves are straight-line. The spiral grooves solve the problem of long chip removal, the straight grooves handle broken chips, and the extended notch increases the chip capacity, thereby improving the chip removal efficiency.

[0011] As a further improvement of this utility model: the surface of the guide section is provided with a plurality of contact blocks, the contact blocks are evenly distributed around the guide section and protrude from the surface of the guide section, and the side diameter of the plurality of contact blocks is the same as the end face area of ​​the tapered section. The coaxial calibration structure of the guide section contact blocks and the tapered section, through the circumferential distribution of the contact blocks and the matching of the end face area, realizes automatic centering in the initial stage of processing.

[0012] As a further embodiment of this utility model: a positioning screw is provided on one side of the surface of the guide section, and a plurality of positioning screw holes are provided on the surface of the guide section. The cutter body passes through the main and secondary cutting edges and the tapered section, and is threadedly connected to the positioning screw, and is locked by means of the positioning screw holes.

[0013] Compared with the prior art, this utility model provides a wear-resistant multi-blade honing knife, which has the following beneficial effects: This invention features a two-section cylindrical cutter body. The front end is sequentially equipped with a tapered section and a guide section. Evenly distributed contact blocks on the guide section surface ensure coaxiality between the cutter and the machining hole. The guide section's side diameter is the same as the end face area of ​​the tapered section, effectively reducing initial contact stress and preventing hole misalignment. The main and secondary cutting edges work in conjunction with helical and linear chip removal grooves. The helical chip removal groove, located in the filter section connection area, uses centrifugal force to discharge chips along a helical trajectory, preventing chip blockage and affecting the surface roughness of the machined part. The linear chip removal groove quickly discharges axial cutting force. The combination of these two features achieves efficient chip removal. The wear-resistant protrusions on the inclined surface of the filter section increase the contact area and friction coefficient, converting radial vibration during machining into heat dissipation, significantly improving tool life.

[0014] In this invention, the tool holder is movably connected to the tool body via a connecting sleeve. The connecting hole on the end face of the connecting sleeve can be adapted to various machine tool spindle interfaces. The rubber pad tube at the other end absorbs axial vibration during high-speed rotation, reducing the rigid impact between the tool and the spindle. The positioning groove on the surface of the tool holder, together with the positioning screw and positioning screw hole of the tool body, form a three-level locking structure. First, the axial position of the tool body is initially fixed by the positioning screw, and then the positioning screw hole is threaded to ensure no relative displacement during high-speed cutting.

[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a wear-resistant multi-blade honing cutter proposed in this utility model. Figure 2 A schematic diagram showing the separate sections of the tapered section and the guide section of a wear-resistant multi-bladed honing cutter proposed in this utility model; Figure 3 A schematic diagram of the split three-dimensional structure of the handle of a wear-resistant multi-blade honing knife proposed in this utility model; Figure 4 This is a schematic diagram of the split structure of the main and secondary cutting edges and the tool body of a wear-resistant multi-blade honing tool proposed in this utility model.

[0017] In the diagram: 1. Tool body; 2. Main and secondary cutting edges; 3. Filtering section; 4. Tapered section; 5. Guide section; 6. Connecting sleeve; 7. Rubber pad tube; 8. Tool holder; 9. Chip removal groove; 10. Extended notch; 11. Contact block; 12. Positioning screw; 13. Positioning screw hole; 14. Wear-resistant protrusion; 15. Connecting hole; 16. Positioning groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Example: A wear-resistant multi-bladed honing knife, such as Figures 1-4As shown, the tool includes a cutter body 1, the surface of which is shaped like two cylindrical sections with different radii. The surface of the cutter body 1 is provided with external threads. The surface of the cutter body 1 is provided with two main and secondary cutting edges 2. A filter section 3 is fixedly provided on one side of the main cutting edge. A tapered section 4 is provided at the front end of the cutter body 1. A guide section 5 is provided at the front end of the tapered section 4. The surface of the filter section 3 is inclined and has several wear-resistant protrusions 14. A connecting sleeve 6 is movably provided on one side of the cutter body 1. The connecting sleeve 6 is cylindrical and has a connecting hole 15 on its end face. A rubber pad tube 7 is provided at the other end of the connecting sleeve 6. A tool holder 8 is fixedly provided on the other side of the connecting sleeve 6. The tapered section 4 and the guide section 5 are arranged sequentially at the front end. The contact blocks 11 evenly distributed on the surface of the guide section 5 can ensure the coaxiality of the tool and the machining hole. The design that its side diameter is the same as the end face area of ​​the tapered section 4 effectively reduces the initial contact stress and avoids the hole opening deviation.

[0021] like Figures 1-4 As shown, the tool holder 8 engages with the connecting sleeve 6. The surface of the tool holder 8 is provided with several positioning grooves 16. The surfaces of the main and secondary cutting edges 2 are provided with several chip removal grooves 9 extending along their axial direction. The surface of the tapered section 4 is provided with several expansion notches 10. The main and secondary cutting edges 2 cooperate with the spiral and straight chip removal grooves 9. The spiral chip removal groove 9 located in the connecting area of ​​the filter section 3 uses centrifugal force to discharge chips along the spiral trajectory, preventing chip blockage from affecting the surface roughness of the machined surface. The straight chip removal groove 9 quickly discharges the axial cutting force. The combination of the two achieves efficient chip removal. The wear-resistant protrusions 14 inclined on the surface of the filter section 3 increase the contact area and friction coefficient, converting the radial vibration during the machining process into heat energy dissipation, significantly improving the tool life.

[0022] like Figures 1-3 As shown, the chip removal grooves 9 on the surface of the main and secondary cutting edges 2 connected to the filter section 3 are spiral-shaped, while the extended notch 10 and the other part of the chip removal grooves 9 are straight. The surface of the guide section is provided with several contact blocks 11, which are evenly distributed around the guide section and protrude from the surface of the guide section. The side diameter of several contact blocks 11 is the same as the end face area of ​​the tapered section 4. A positioning screw 12 is provided on one side of the surface of the guide section, and several positioning screw holes 13 are provided on the surface of the guide section. The tool body 1 passes through the main and secondary cutting edges 2 and the tapered section 4, and is threadedly connected to the positioning screw 12. It is locked by means of the positioning screw holes 13. The tool holder 8 is movably connected to the tool body 1 through the connecting sleeve 6. The connecting hole 15 on the end face of the connecting sleeve 6 can be adapted to various machine tool spindle interfaces. The rubber pad tube 7 at the other end absorbs axial vibration during high-speed rotation, reducing the rigid impact between the tool and the spindle. The positioning groove 16 on the surface of the tool holder 8, together with the positioning screw 12 and the positioning screw hole 13 of the tool body 1, form a three-level locking structure.

[0023] Working principle: First, the tool holder 8 is fixed to the machine tool spindle through the connecting hole 15 of the connecting sleeve 6. The rubber pad tube 7 absorbs the initial vibration of the spindle to ensure smooth power transmission. The contact block 11 of the guide section 5 enters the pre-drilled hole first, and the tool axis is calibrated by the evenly distributed circumferential contact points. The expansion notch 10 of the tapered section 4 expands the hole diameter guide space and reduces the entry resistance. The main and secondary cutting edges 2 participate in cutting simultaneously. The spiral chip removal groove 9 generates centrifugal force when rotating, rolling the plastic chips into a spiral shape and discharging them along the filter section 3. The straight chip removal groove 9 quickly discharges brittle and fragmented chips, avoiding chip accumulation and scratching the machined surface. The wear-resistant protrusions 14 of the filter section 3 play a squeezing and flattening role during the hole wall finishing stage.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant multi-blade honing knife, comprising a blade body (1), characterized in that: The surface of the blade (1) is in the shape of two cylindrical tubes with different radii. The surface of the blade (1) is provided with external threads. The surface of the blade (1) is provided with two main and secondary cutting edges (2). A filter section (3) is fixedly provided on the side of the main and secondary cutting edges (2) away from the end face of the blade (1). The front end of the blade (1) is provided with a tapered section (4). The front end of the tapered section (4) is provided with a guide section (5). The surface of the filter section (3) is inclined and has several wear-resistant protrusions (14).

2. The wear-resistant multi-blade honing knife according to claim 1, characterized in that: A connecting sleeve (6) is movably provided on one side of the blade body (1). The connecting sleeve (6) is in the shape of a round tube and has a connecting hole (15) on its end face. A rubber pad tube (7) is provided at the other end of the connecting sleeve (6). A handle (8) is fixedly provided on the other side of the connecting sleeve (6).

3. The wear-resistant multi-blade honing knife according to claim 2, characterized in that: The tool holder (8) engages with the connecting sleeve (6), and the surface of the tool holder (8) is provided with several positioning grooves (16).

4. A wear-resistant multi-blade honing knife according to claim 3, characterized in that: The surfaces of the main and secondary cutting edges (2) are provided with several chip removal grooves (9) extending along their axial direction, and the surfaces of the tapered section (4) are provided with several extended notches (10).

5. A wear-resistant multi-blade honing cutter according to claim 4, characterized in that: The chip removal groove (9) on the surface of the main and secondary cutting edges (2) connected to the filter section (3) is spiral-shaped, and the extended notch (10) and the other part of the chip removal groove (9) are both straight.

6. A wear-resistant multi-blade honing knife according to claim 1, characterized in that: The surface of the guide section (5) is provided with a plurality of contact blocks (11). The contact blocks (11) are evenly distributed around the guide section and protrude from the surface of the guide section, and the side diameter of the plurality of contact blocks (11) is the same as the end face area of ​​the tapered section (4).

7. A wear-resistant multi-blade honing knife according to claim 1, characterized in that: A positioning screw (12) is provided on one side of the surface of the guide section, and a plurality of positioning screw holes (13) are provided on the surface of the guide section. The cutter body (1) passes through the main and secondary cutting edges (2) and the tapered section (4), and is threadedly connected to the positioning screw (12), and is locked by means of the positioning screw holes (13).

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