A two-way compound lathe tool suitable for locomotive wheel hub

Abstract

The utility model provides a kind of two-way composite lathe tool suitable for locomotive hub, solve the problem that the existing lathe tool processing locomotive hub needs multiple tool changing and poor stability, realize the completion of once clamping multiple features processing in hub inner surface, while improve cutting stability and tool life, including tool bar, the lower end of tool bar is provided with blade mounting seat, the front of blade mounting seat is vertical blade mounting face, two symmetrical distribution's tool grooves are equipped on the blade mounting face, first blade and second blade are sequentially mounted in detachable mode from top to bottom in two tool grooves, first blade and second blade are symmetrically distributed in top and bottom;The outer side of blade mounting seat is sequentially provided with first chip guide groove and second chip guide groove from top to bottom, first chip guide groove and second chip guide groove are both arc surface, first chip guide groove and second chip guide groove are respectively aligned with first blade and second blade.

Description

Technical Field

[0001] This utility model relates to the field of metal cutting tool processing, and in particular to a two-way composite turning tool suitable for locomotive wheel hubs. Background Technology

[0002] A lathe tool is a cutting tool with a single cutting section used for turning. It is one of the most widely used cutting tools in machining. The working part of a lathe tool is what generates and handles chips, including the cutting edge, structures that break or coil the chips, spaces for chip removal or storage, and channels for cutting fluid.

[0003] In the field of locomotive manufacturing, the axle holes of locomotive wheel hubs require machining with cutting tools. Traditional single-edged cutting tools require multiple tool changes or adjustments to complete the machining of complex internal surfaces of the hub, such as forward and reverse end faces, inner holes, and transition arcs, resulting in low efficiency. Existing bidirectional cutting tools have a welded structure and fixed insert angles, making them unsuitable for cutting different materials. Furthermore, their poor insert symmetry and unbalanced bidirectional cutting forces lead to short tool life. They also lack chip removal and guiding mechanisms, making deep cavity machining prone to chip entanglement. Utility Model Content

[0004] This invention provides a two-way composite turning tool suitable for locomotive wheel hubs, which solves the problem that existing turning tools require multiple tool changes and have poor stability when machining locomotive wheel hubs. It enables the machining of multiple features on the inner surface of the hub in a single setup, while improving cutting stability and tool life. This utility model is achieved through the following technical solution: A two-way composite turning tool for locomotive wheel hubs includes a tool holder, the lower end of which is provided with a blade mounting seat. The front of the blade mounting seat is a vertical blade mounting surface. The blade mounting surface is provided with two vertically symmetrically distributed tool slots. The two tool slots are detachably mounted with a first blade and a second blade from top to bottom. The first blade and the second blade are vertically symmetrically distributed. The outer side of the blade mounting base is provided with a first chip guide groove and a second chip guide groove from top to bottom. Both the first chip guide groove and the second chip guide groove are arc-shaped surfaces. The first chip guide groove and the second chip guide groove are respectively aligned with the first blade and the second blade.

[0005] Furthermore, both the first and second blades are rhomboid blades, and both the cutting grooves are rhomboid grooves. A threaded hole is provided at the center of each cutting groove, and the first and second blades are connected to each other in the two cutting grooves by screws.

[0006] Furthermore, a damping block is embedded in the lower end of the tool holder on the side away from the mounting base.

[0007] Furthermore, the cutter bar has a channel along its length, the top of the cutter bar has a water inlet hole connected to the channel, and the lower end of the cutter bar has a nozzle connected to the channel, with the nozzle orifice facing the blade mounting surface.

[0008] Furthermore, the principal cutting edge angle of the first blade and the second blade is 35°.

[0009] Furthermore, both the first and second blades are made of cemented carbide material; The cutting edges of the first and second blades are processed using a micron-level passivation process.

[0010] The beneficial effects achieved by this utility model compared with the prior art are as follows: 1. The blade mounting surface of this utility model is provided with two symmetrically distributed blade grooves. The first blade and the second blade are detachably installed in the two blade grooves from top to bottom. The two blades are clamped at one time, which can realize the processing of two processes in both directions, avoid the cumulative error caused by repeated positioning, and greatly improve the processing efficiency. The first and second cutting inserts are symmetrically distributed vertically and are installed in a detachable manner, allowing for insert replacement as needed. They have good symmetry, ensuring bidirectional cutting force balance, improving stability, and thus increasing tool life. The first and second chip guide grooves are aligned with the first and second blades, respectively, which can separate and discharge chips to prevent chips from entangled in the tool or flying and injuring people, thus reducing the risk of workplace injuries. 2. Traditional single-edged turning tools require multiple tool changes or adjustments to complete the machining of complex internal surfaces of the hub, such as forward and reverse end faces, inner holes, and transition arcs, which is inefficient. The design of this application reduces the number of tools. The original process required multiple tools (internal hole tool, end face tool, chamfering tool), but now only one composite tool is needed, saving tool costs and tool change time, increasing the tool utilization rate by 30%, and reducing the overall cost. 3. A damping block is embedded on the lower end of the tool holder on the side away from the mounting base, which overcomes the problem that single-edged tools are prone to vibration due to insufficient rigidity when machining deep cavity structures, resulting in poor surface roughness and reducing vibration; 4. Both the first and second blades are rhomboid blades, and the blade grooves are all rhomboid grooves, which makes installation and positioning convenient. They are fixed by screws, and the operation is simple and convenient. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the bidirectional composite turning tool for locomotive wheel hubs described in this utility model; Figure 2 for Figure 1 Enlarged diagram of part A in the middle; Figure 3A schematic diagram of a blade mounting bracket without the first and second blades installed; Figure 4 This is a schematic diagram of the installation of the damping and shock-absorbing block described in this utility model; Figure 5 A schematic diagram of the locomotive wheel hub workpiece manufactured under this utility model; Figure 6 This is a schematic diagram of the first and second chip guide grooves of the blade mounting seat described in this utility model; In the figure: 1. Tool holder, 2. Blade mounting base, 3. Blade mounting surface, 4. Tool groove, 5. First blade, 6. Second blade, 7. First chip guide groove, 8. Second chip guide groove, 9. Damping shock absorber block, 10. Water inlet, 11. Nozzle. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0013] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", 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 the 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 the utility model.

[0014] Example 1 This embodiment discloses a two-way composite turning tool suitable for locomotive wheel hubs, such as... Figure 1-2 As shown, the main components include a tool holder 1, a blade mounting base 2, a first blade 5, and a second blade 6. The tool holder 1 is made of conventional metal material, and the lower end of the tool holder 1 is fixedly connected to the blade mounting base 2. A vertical plane is machined into the blade mounting base 2 and defined as the front surface, which is the vertical blade mounting surface 3.

[0015] Both the first blade 5 and the second blade 6 are rhomboid blades made of cemented carbide. Their cutting edges are processed using a micron-level passivation process, which reduces the risk of chipping. In this embodiment, the principal cutting edge angle of the first blade 5 and the second blade 6 is 35°. Figure 3As shown, to facilitate the positioning and installation of the first blade 5 and the second blade 6, two symmetrically distributed cutting grooves 4 are machined on the blade mounting surface 3. Both cutting grooves 4 are diamond-shaped grooves, which facilitate the insertion of the first blade and the second blade. A threaded hole is machined at the center of the cutting groove 4, and the first blade 5 and the second blade 6 are connected to the threaded holes of the two cutting grooves 4 by screws.

[0016] like Figure 6 As shown, the outer surface of the blade mounting base 2 is machined with a first chip guide groove 7 and a second chip guide groove 8 from top to bottom. Both the first chip guide groove 7 and the second chip guide groove 8 adopt an arc-shaped surface design, and are aligned with the first blade 5 and the second blade 6, respectively. This design allows for the separation and removal of chips when the corresponding blades are cutting, preventing chips from entangled in the tool or flying and causing injury, thus reducing the risk of workplace injuries.

[0017] The cutting tool generates heat during operation. To effectively cool it down, a channel is provided inside the tool holder 1 along its length. A water inlet 10 connecting the channel is provided at the top of the tool holder 1, and a nozzle 11 connecting the channel is installed at the lower end of the tool holder 1, with the nozzle 11 facing the cutting tool mounting surface 3.

[0018] Taking the machining of the shaft hole of a locomotive wheel hub using the two-way composite turning tool for locomotive wheel hubs described in this embodiment as an example, such as... Figure 5 As shown, the working objective is to machine the inner bore surface at both the upper and lower ends of the shaft hole of the wheel hub workpiece. The tool holder 1 is fixed to the machine head, and the wheel hub to be machined is mounted on the machining table. The tool holder 1 is moved until the second cutting edge reaches the inner bore surface at the upper end of the shaft hole of the wheel hub workpiece. A conventional machining method is used, where the wheel hub workpiece rotates while the tool holder remains stationary, and the second cutting edge cuts the inner bore surface. The generated chips are discharged through the second guide groove to prevent chips from entangled in the tool or flying and causing injury, thus reducing the risk of workplace injury. After machining is completed, the tool holder continues to descend until the first cutting edge reaches the inner bore surface at the lower end of the shaft hole of the wheel hub workpiece, and then cutting is performed. During machining, coolant is introduced through the water inlet and the cutting edge is cooled through nozzles.

[0019] The above scheme allows for the simultaneous clamping of two cutting inserts, enabling machining in both forward and reverse directions. This avoids the cumulative errors caused by repeated positioning and significantly improves machining efficiency. It also features good symmetry, ensuring balanced cutting forces in both directions, improving stability, and thus extending tool life. The first and second chip guide grooves are aligned with the first and second cutting inserts, respectively, enabling directional chip removal and preventing chips from entangled in the tool or flying and causing injury, thereby reducing the risk of workplace injuries.

[0020] Example 2 This embodiment discloses a two-way composite turning tool suitable for locomotive wheel hubs, and further optimizations include... Figure 4As shown, a notch is designed on the lower end of the tool holder 1 on the side away from the mounting base, and a damping block 9 is embedded in the notch. This design overcomes the problem of insufficient rigidity of single-edged tools when machining deep cavity structures, which easily leads to vibration and poor surface roughness, and reduces vibration.

Claims

1. A two-way composite turning tool suitable for locomotive wheel hubs, characterized in that, Includes a tool holder (1), the lower end of which is provided with a blade mounting seat (2), the front of which is a vertical blade mounting surface (3), and the blade mounting surface (3) is provided with two vertically symmetrically distributed cutting grooves (4), and the two cutting grooves (4) are detachably mounted with a first blade (5) and a second blade (6) from top to bottom, and the first blade (5) and the second blade (6) are symmetrically distributed vertically; The outer side of the blade mounting base (2) is provided with a first chip guide groove (7) and a second chip guide groove (8) from top to bottom. The first chip guide groove (7) and the second chip guide groove (8) are both arc-shaped surfaces. The first chip guide groove (7) and the second chip guide groove (8) are respectively aligned with the first blade (5) and the second blade (6).

2. The double-sided composite turning tool for locomotive wheel hubs according to claim 1, characterized in that, The first blade (5) and the second blade (6) are both rhomboid blades, and the cutting grooves (4) are all rhomboid grooves. A threaded hole is provided at the center of the cutting grooves (4). The first blade (5) and the second blade (6) are connected in the two cutting grooves (4) by screws.

3. The double-sided composite turning tool for locomotive wheel hubs according to claim 2, characterized in that, The lower end of the blade holder (1) is fitted with a damping block (9) on the side away from the blade mounting seat.

4. The double-sided composite turning tool for locomotive wheel hubs according to claim 2, characterized in that, The blade (1) has a channel along its length. The top of the blade (1) has a water inlet (10) that connects to the channel. The bottom of the blade (1) has a nozzle (11) that connects to the channel. The nozzle (11) faces the blade mounting surface (3).

5. The double-sided composite turning tool for locomotive wheel hubs according to claim 3, characterized in that, The principal cutting angle of the first blade (5) and the second blade (6) is 35°.

6. The double-sided composite turning tool for locomotive wheel hubs according to any one of claims 2-5, characterized in that, Both the first blade (5) and the second blade (6) are made of cemented carbide material; The cutting edges of the first blade (5) and the second blade (6) are processed by a micron-level passivation process.

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