Drill bit capable of improving hole machining precision

Abstract

The utility model relates to the technical field of machinery, in particular to a drill bit capable of improving hole machining precision. According to the technical scheme, the cutter comprises a cutter handle, cutter handle grooves are formed in the two sides of the outer wall of the cutter handle, a cutter body is arranged at one end of the cutter handle, a cutter handle hole is formed in the center of one end of the cutter handle, three sets of threaded grooves are formed in the outer wall of the cutter body, and blades are arranged on the edges of the threaded grooves. When the device is used, the cutter handle is installed on the cutter rest of the milling machine through the cutter handle groove, the milling machine is used for driving the drill bit to rotate at a high speed, when the drill bit drills a workpiece, the positioning cutter point firstly makes contact with the workpiece, a positioning hole is drilled in the surface of the workpiece, the drill bit can go deep subsequently, and three sets of blades continuously drill the workpiece. And when the blades are abraded, the blades can be detached by screwing the screws, replacement is facilitated, and meanwhile the drilling precision cannot be affected even if one blade is abraded.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field, concretely is a drill bit of improving hole processing accuracy. BACKGROUND

[0002] The process method that drills a hole on solid material with a drill bit is called drilling, drilling is one of the basic methods of hole processing, drilling is usually carried out on a drill press or a lathe, and can also be carried out on a boring machine or a milling machine, the drill press is the main machine tool for hole processing, and drilling holes on the drill press mainly uses drill bits, when drilling holes on a lathe, the workpiece rotates, and the tool makes a feed motion, while when processing on a drill press, the workpiece does not move, and the tool makes a rotational main motion while moving along the axial direction to make a feed motion, so the drill press is suitable for processing holes on workpieces that do not have a symmetrical axis of rotation, especially for multi-hole processing, such as processing holes on box bodies, racks and other parts, but in actual use, similar drill bits still have many defects, such as: the existing drill bits are prone to wear during use, when the cutting edge is worn, the accuracy of the drilled hole will decrease, resulting in low smoothness of the hole, thereby affecting the product yield. SUMMARY

[0003] The utility model discloses a drill bit for improving hole processing accuracy to solve the problems in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a drill bit for improving hole processing accuracy, including the handle of a knife, the both sides of handle's outer wall all are seted up handle groove, the one end of handle is provided with the cutter body, the one end center of handle is seted up handle hole, the outer wall of cutter body is seted up three groups of thread grooves, and the edge of thread groove is provided with the cutting edge.

[0005] When the drill bit for improving hole processing accuracy is used, the handle is installed on the tool rest of the milling machine through the handle groove, the milling machine is used to drive the drill bit to rotate at high speed, when the drill bit drills the workpiece, the positioning tip first contacts the workpiece, a positioning hole is drilled on the surface of the workpiece, which facilitates the subsequent drilling of the drill bit, and the three groups of blades continuously drill the workpiece, thereby reducing the wear of a single blade, when the blade is worn, the blade can be removed by screwing the screw, which is convenient for replacement, and the accuracy of drilling is not affected when one blade is worn, the handle hole is arranged at one end of the handle, the cutting fluid flows to the drain hole through the handle hole, the drain hole is arranged at the position of the blade back, the waste chips do not block the drain hole during drilling, the cutting fluid can cool the blade, and the service life is increased.

[0006] As a preferred technical scheme of the utility model, the distal end of the cutting edge is provided with a cutting edge groove, and a threaded hole is arranged at the center of the cutting edge groove.

[0007] As a preferred technical scheme of the utility model, the inside of the blade slot is provided with a blade, a through hole is formed in the center of the blade, and the through hole is concentrically matched with the threaded hole; the threaded hole is provided, the screw is installed into the threaded hole through the through hole, and the blade is fixed.

[0008] As a preferred technical scheme of the utility model, the inside of the through hole is penetrated by a screw, and one end of the screw is engagedly installed in the inside of the threaded hole; the screw is provided, and the worn blade is conveniently replaced.

[0009] As a preferred technical scheme of the utility model, the one end center of the blade body is fixedly provided with a positioning blade tip, the positioning blade tip is made of high-speed steel material, the high-speed steel material is used for the positioning blade tip, the drill bit has good toughness, and can bear greater cutting force and impact force.

[0010] As a preferred technical scheme of the utility model, the other side of the blade edge is a blade back, a drainage hole is formed in the center of the blade back, and the drainage hole is communicated with the shank hole.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. When the drill bit for improving the machining precision of the hole is used, the shank is installed on the tool rest of the milling machine through the shank slot, the milling machine is used to drive the drill bit to rotate at high speed, the positioning blade tip first contacts the workpiece when the drill bit drills the workpiece, the positioning hole is drilled on the surface of the workpiece, the subsequent drill bit is conveniently deepened, the three groups of blades continuously drill the workpiece, the wear of the single blade is reduced, the blade can be disassembled by screwing the screw when the blade is worn, the blade is conveniently replaced, and the precision of the drilling is not affected when one blade is worn.

[0013] 2. The cutting fluid flows to the drainage hole through the shank hole, the drainage hole is arranged at the position of the blade back, the waste chip does not block the drainage hole in the drilling process, the cutting fluid is conveniently cooled to the blade, and the service life is increased. DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0016] Figure 3 It is an explosion structural schematic diagram of the utility model;

[0017] Figure 4 It is an enlarged schematic diagram of the structure of A in the utility model.

[0018] In the diagram: 1. Handle; 2. Handle groove; 3. Blade body; 4. Blade edge; 5. Threaded groove; 6. Positioning tip; 7. Handle hole; 8. Blade groove; 9. Threaded hole; 10. Blade; 11. Through hole; 12. Screw; 13. Back of blade; 14. Drain hole. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figure 1 - Figure 4 As shown, the present invention proposes a drill bit for improving hole machining accuracy, including a shank 1, shank grooves 2 on both sides of the outer wall of the shank 1, a cutter body 3 at one end of the shank 1, a shank hole 7 at the center of one end of the shank 1, three sets of threaded grooves 5 on the outer wall of the cutter body 3, and a cutting edge 4 at the edge of the threaded grooves 5.

[0022] The blade 4 has a blade groove 8 at its end, and a threaded hole 9 is provided at the center of the blade groove 8.

[0023] The blade 10 is installed inside the blade groove 8. A through hole 11 is provided at the center of the blade 10. The through hole 11 is concentrically fitted with the threaded hole 9.

[0024] The working principle of a drill bit for improving hole machining accuracy based on Embodiment 1 is as follows: When using the drill bit for improving hole machining accuracy, the tool holder 1 is installed on the tool post of the milling machine through the tool holder groove 2. The milling machine drives the drill bit to rotate at high speed. When the drill bit drills the workpiece, the positioning tip 6 first contacts the workpiece and drills a positioning hole on the workpiece surface to facilitate the subsequent drilling. The three sets of cutting inserts 10 continuously drill the workpiece, thereby reducing the wear of individual cutting inserts 10. When the cutting insert 10 is worn, it can be removed by turning the screw 12 for easy replacement. The wear of one cutting insert 10 will not affect the drilling accuracy. A tool holder hole 7 is opened at one end of the tool holder 1. The cutting fluid flows to the drain hole 14 through the tool holder hole 7. Since the drain hole 14 is located at the back of the tool 13, the waste chips will not block the drain hole 14 during the drilling process, which facilitates the cooling of the cutting fluid on the cutting insert 10 and increases its service life.

[0025] Example 2

[0026] like Figure 1 - Figure 4As shown in the figure, the utility model provides a drill bit of improving hole machining precision, compared with embodiment one, this embodiment still includes: the through hole 11 is penetrated by screw 12, one end of screw 12 is engaged and installed in the threaded hole 9, the one end center of cutter body 3 is fixedly provided with positioning blade tip 6, positioning blade tip 6 adopts high speed steel material, the other side of cutting edge 4 is blade back 13, the center of blade back 13 is provided with drainage hole 14, and drainage hole 14 is communicated with tool shank hole 7.

[0027] In the embodiment, as shown in the figure, Figure 1 Screw 12 is installed into threaded hole 9 through through hole 11, so that blade 10 is fixed; as shown in the figure, Figure 3 Screw 12 is arranged, so that worn blade 10 can be replaced conveniently; as shown in the figure, Figure 3 Positioning blade tip 6 is made of high speed steel material, so that drill bit has good toughness and can bear greater cutting force and impact force.

[0028] The above specific embodiments are only several preferred technical scheme embodiments of the utility model, and based on the technical scheme of the utility model and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A drill bit for improving the accuracy of hole machining, comprising a shank (1), characterized in that: The outer wall of the tool holder (1) is provided with a tool holder groove (2) on both sides, one end of the tool holder (1) is provided with a tool body (3), a tool holder hole (7) is arranged at the center of one end of the tool holder (1), three groups of thread grooves (5) are arranged on the outer wall of the tool body (3), and cutting edges (4) are arranged at the edges of the thread grooves (5).

2. The drill bit of claim 1, wherein: The end of the cutting edge (4) is provided with a cutting edge groove (8), and a threaded hole (9) is arranged at the center of the cutting edge groove (8).

3. The drill bit of claim 2, wherein: The inside of the cutting edge groove (8) is provided with a blade (10), a through hole (11) is arranged at the center of the blade (10), and the through hole (11) is in concentric cooperation with the threaded hole (9).

4. The drill bit of claim 3, wherein: The inside of the through hole (11) is penetrated by a screw (12), and one end of the screw (12) is engaged and arranged in the threaded hole (9).

5. The drill bit of claim 1, wherein: The center of one end of the tool body (3) is fixedly provided with a positioning tool tip (6), and the positioning tool tip (6) is made of high-speed steel.

6. The drill bit of claim 1, wherein: The other side of the cutting edge (4) is a tool back (13), a drainage hole (14) is arranged at the center of the tool back (13), and the drainage hole (14) is communicated with the tool holder hole (7).

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