Special drill bit for machining steel rail frog

Abstract

The utility model discloses a special drill bit for processing a steel rail frog, which is applied to the processing of a high manganese steel frog steel rail web bolt connecting hole and comprises an alloy blade (1), a cutter body (2) and a cutter handle (3), the alloy blade (1) is arranged at the front end of the cutter body (2), and the cutter handle (3) is arranged at the other end of the cutter body (2). The alloy blade (1) is of a three-tool-nose structure, and a main tool nose (1.1) in the middle is provided with a chisel edge and is slightly higher than auxiliary tool noses (1.2) on the two sides. According to the drill bit special for machining the steel rail frog, the blade is of a three-tool-nose structure, the spiral groove is formed in the blade body, durability and heat dissipation performance of the drill bit special for machining the steel rail frog are improved, and the service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool cutters, in particular to a special drill bit for machining rail frogs. Background Art

[0002] During the processing of high manganese steel frog machines, since the rails and frogs need to be connected, it is necessary to drill the joint bolt holes on the rail waist at the connection of the high manganese steel frog. High manganese steel has work hardening characteristics, which makes traditional welding alloy drills face many challenges when processing. These conventional drills mostly use a single-tip structure, which is not only easy to break, but also has poor rigidity, resulting in a short tool life and increased costs. With the increasingly fierce market competition, companies are also more stringent in cost control. Traditional welding drills can no longer meet market demand. Utility Model Content

[0003] The utility model provides a special drill bit for processing a rail frog, which is suitable for the needs of enterprises and has durability and good processing quality.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A special drill bit for rail frog processing is used for processing the waist bolt connection holes of high manganese steel frog rails. The drill bit comprises an alloy blade, a blade body and a handle. The alloy blade is installed at the front end of the blade body, and the other end of the blade body is the handle. The alloy blade has a three-tip structure, and the main blade tip in the middle has a transverse edge and is slightly higher than the auxiliary blade tips on both sides.

[0006] Furthermore, the three blade tips of the alloy blade form a bent serrated shape.

[0007] Furthermore, chip removal grooves are provided on both sides of the main tool tip.

[0008] Furthermore, a spiral groove is arranged on the blade.

[0009] Furthermore, the spiral groove extends to the alloy insert and is connected to the chip groove, the depression between the main tool tip and the auxiliary tool tip.

[0010] Furthermore, the tool handle and the drill machine tool are detachably mounted.

[0011] Furthermore, the main tool tip angle is 120 degrees, and the angle at which the drill tip of the alloy blade intersects with the outer circle is 70 degrees.

[0012] Based on the above technical solution, the following technical effects can be produced:

[0013] The utility model provides a special drill bit for rail frog processing, which adopts a three-tip structure with a central main tip having a transverse edge and slightly higher than the auxiliary tips on both sides. When drilling, the three-tip structure cuts smaller materials, and the chips are easily broken and discharged. At the same time, chip grooves are arranged on both sides of the main tip, and the chip grooves and the spiral grooves on the blade are connected to make chip removal smoother. At the same time, the three-tip structure adopted in the present application has a larger contact surface between the cutting edge and the workpiece when drilling, and the heat dissipation effect is better, thereby reducing the thermal wear of the tool and extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a two-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a cross-sectional view of the alloy blade in the utility model.

[0017] In the figure: 1-alloy blade, 1.1-main blade tip, 1.2-secondary blade tip, 2-blade body, 2.1-spiral groove, 3-handle. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 3As shown, a special drill bit for rail frog processing is used for processing the bolt connection holes of the waist of high manganese steel frog rails, comprising an alloy blade 1, a blade body 2 and a handle 3. The alloy blade 1 is installed at the front end of the blade body 2, and the other end of the blade body 2 is the handle 3. The alloy blade 1 is a three-tip structure, and the central main tip 1.1 has a transverse edge and is slightly higher than the auxiliary tips 1.2 on both sides.

[0023] According to one embodiment of the utility model, the three blade tips of the alloy blade 1 form a bent serrated shape, and chip grooves are provided on both sides of the main blade tip 1.1. The main blade tip 1.1 plays a centering role when drilling, and the three-blade tip structure is smoother in chip removal than the traditional single blade tip structure. The traditional blade tip has a large cutting surface, produces wide iron chips, and has high requirements for the chip removal space of the tool. The three-blade tip structure uses three blade tips to cut, and the width of the iron chips produced is narrower, which makes chip removal smoother; reduces the groove space requirement and effectively improves the rigidity of the tool. At the same time, when drilling holes of the same diameter, the three-blade tip structure has a larger contact surface between the blade and the workpiece, and has a better heat dissipation effect, which avoids thermal wear of the tool and extends the service life of the tool. In actual use, an internal cooling structure can also be set on the drill bit according to the situation. The internal cooling structure is a prior art and will not be described in detail here.

[0024] According to an embodiment of the utility model, a spiral groove 2.1 is provided on the blade body 2, and the spiral groove 2.1 extends to the alloy blade 1 and communicates with the chip groove, the low-lying part between the main blade tip 1.1 and the auxiliary blade tip 1.2. When drilling, the main blade tip 1.1 first contacts the surface of the workpiece, and the chips cut by the main blade tip 1.1 will pass through the chip grooves on both sides and finally be discharged from the spiral groove 2.1, which is more conducive to chip removal.

[0025] According to an embodiment of the utility model, the tool handle 3 is detachably mounted on the drill bit machine. The tool handle 3 can be selected with a suitable mounting structure according to the processing equipment, such as a straight handle, a flattened handle, a Morse taper handle, etc.

[0026] According to one embodiment of the utility model, the main cutting edge 1.1 has a cutting edge angle of 120 degrees, and the angle at which the drill tip of the alloy blade 1 intersects with the outer circle is 70 degrees. In this embodiment, the thickness of the alloy blade 1 is customized to 6 mm, which effectively improves the processing stability and anti-chipping performance of the tool.

[0027] The utility model is described in detail above with reference to the accompanying drawings and embodiments, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of ordinary technicians in the field without departing from the purpose of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope of protection of the utility model.

Claims

1. A special drill bit for processing rail frogs, used for processing the bolt connection holes of high manganese steel frog rails, comprising an alloy blade (1), a blade body (2) and a handle (3), characterized in that: The alloy blade (1) is mounted on the front end of a blade body (2), and the other end of the blade body (2) is a blade handle (3). The alloy blade (1) has a three-tip structure, and a central main tip (1.1) has a transverse edge and is slightly higher than the secondary tips (1.2) on both sides.

2. A special drill bit for rail frog machining according to claim 1, characterized in that: The three blade tips of the alloy blade (1) form a bent sawtooth shape.

3. A special drill bit for rail frog machining according to claim 1, characterized in that: Chip removal grooves are provided on both sides of the main tool tip (1.1).

4. A special drill bit for rail frog machining according to claim 3, characterized in that: The blade body (2) is provided with a spiral groove (2.1).

5. A special drill bit for rail frog machining according to claim 4, characterized in that: The spiral groove (2.1) extends to the alloy blade (1) and is connected to the chip removal groove, the low-lying portion between the main blade tip (1.1) and the auxiliary blade tip (1.2).

6. The special drill bit for rail frog machining according to claim 1, characterized in that: The tool handle (3) is detachably mounted on the drill bit machine tool.

7. The special drill bit for rail frog machining according to claim 1, characterized in that: The main cutting edge (1.1) has a cutting edge angle of 120 degrees, and the angle at which the drill tip of the alloy blade (1) intersects with the outer circle is 70 degrees.

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