Cutter sharpening device of deep hole drill bit

Abstract

The utility model relates to a cutter sharpening device, in particular to a cutter sharpening device of a deep hole drill bit, and solves the problems that blades of an existing welding type deep hole drill bit are wasted, and cutter sharpening is inconvenient. According to the technical scheme, the tool comprises a rectangular body, inserting holes are symmetrically formed in the front side and the rear side of the body, a plurality of pressing holes with internal threads are symmetrically formed in the left side and the right side of the body, the tail ends of pressing bolts penetrate through the pressing holes to be inserted into the inserting holes, and a round scale base plate is arranged at the bottom of the body. And the body is connected with the scale chassis through a screw rod and a nut. The cutter sharpening device is extremely simple in structure, the inner cutter and the outer cutter can be fixed at the same time, and the cutting edge inclination angle and the cutting edge sharpening height of a drill bit can be conveniently adjusted during cutting edge sharpening.

Description

Technical Field

[0001] The utility model relates to a tool grinding device, specifically a grinding device for deep hole drills. Background Art

[0002] The drill bits of deep hole drills are divided into welded deep hole drill bits and machined deep hole drill bits. Deep hole drill bits all use internal chip removal. The blades of welded deep hole drill bits cannot be replaced and are disposable. The blades of machined deep hole drill bits can be replaced. After the blades of welded deep hole drill bits are worn after a period of use, grinding is very difficult and they are often directly discarded and cannot be reused. Due to the high value of the blades, it causes great waste.

[0003] The reasons for the difficult grinding of welded deep hole drill bits are as follows: 1) The welded deep hole drill bit is divided into an inner blade and an outer blade. The tool holders of both the inner blade and the outer blade are extremely short, less than 50 mm, and cannot be held by hand. To grind, the tool holder needs to be extended.

[0004] 2) It is difficult to ensure the blade inclination angle required by the tool design with the naked eye after grinding the inner blade and the outer blade.

[0005] 3) It is impossible to well control the height after grinding the inner blade and the outer blade. If not controlled well, during subsequent deep hole machining, it is easy for the inner blade and the outer blade to fail to work together, resulting in chipping, and even product scrapping, causing great economic losses to the company. Summary of the Invention

[0006] The purpose of the utility model is to solve the above technical problems and provide a grinding device for deep hole drill bits with a very simple structure, which can fix the inner blade and the outer blade at the same time, and can conveniently adjust the blade inclination angle and the grinding height of the drill bit during grinding.

[0007] The technical solution includes a rectangular body. Insertion holes are symmetrically opened on the front and rear sides of the body. A plurality of compression holes with internal threads are symmetrically opened on the left and right sides. The end of the compression bolt passes through the compression hole and is inserted into the insertion hole. A circular scale chassis is arranged at the bottom of the body. The body and the scale chassis are connected by a screw rod and a nut.

[0008] Extension parts are arranged below the insertion holes on both sides of the body.

[0009] An arc-shaped positioning groove is opened on the top surface of the extension part.

[0010] The screw rod is a center double-headed screw rod.

[0011] The bottom surface of the scale chassis has an internal groove, and the nut connecting the lower end of the screw rod is located in the internal groove.

[0012] A magnet is embedded in the scale chassis.

[0013] Beneficial effects:

[0014] 1) The rectangular body is used to insert and install the inner tool and the outer tool at the same time, realizing the function of extending the tool handle and meeting the fixed requirements during edge grinding; the pressing bolts cooperate with the pressing holes with internal threads. By tightening the pressing bolts, the ends of the pressing bolts on both sides can correspondingly abut against the tool handle to fix the inner tool and the outer tool; loosening the pressing bolts can conveniently adjust the axial position of the tool handle in the insertion hole, so that the tool extends or retracts by a corresponding distance, thereby controlling the effective heights of the inner tool and the outer tool to be consistent after edge grinding.

[0015] 2) The body and the scale chassis are connected by screws and nuts. The angle of rotation of the body is precisely adjusted by using the scale on the scale chassis, and finally the purpose of adjustable edge inclination angle of the tool is achieved.

[0016] 3) Extension parts are provided below the insertion holes on both sides of the body. An arc-shaped positioning groove is opened on the top surface of the long part, so that the cylindrical surface of the drill bit fits with the arc-shaped groove, playing a positioning role.

[0017] 4) A magnet is installed inside the scale chassis. By using the magnetic attraction function of the magnet, the new practical device can be conveniently and flexibly fixed on the tooling table for convenient edge grinding operation.

[0018] 5) The structure of the present utility model is extremely simple, the inner tool and the outer tool can be fixed at the same time, and the edge inclination angle and the edge grinding height of the drill bit during edge grinding can be conveniently adjusted, improving the processing quality of the product. Description of the drawings

[0019] Figure 1 is a three-dimensional view of the present utility model.

[0020] Figure 2 is a top view of the present utility model.

[0021] Figure 3 is an installation schematic diagram of the inner tool.

[0022] Among them, 1-scale chassis, 11-inner groove, 2-body, 21-insertion hole, 22-pressing hole, 23-pressing bolt, 24-extension part, 25-arc-shaped positioning groove, 3-center double-headed screw, 31-nut, 32-nut, 5-inner tool. Detailed implementation manners

[0023] The present utility model will be further explained below with reference to the drawings:

[0024] See Figure 1, including a rectangular body 2, insertion holes 21 are symmetrically opened along the front and rear sides of the body 2, and a plurality of pressing holes 22 with internal threads are symmetrically opened on the left and right sides. The end of the pressing bolt 23 passes through the pressing hole 22 and is inserted into the insertion hole 21. A circular scale chassis 1 is provided at the bottom of the body. The scale chassis has a 360° scale, which can meet the angle requirements of different drills. The body 2 and the scale chassis 1 are connected by a screw 3 (preferably a central double-headed screw) and a nut 31. Extension parts 24 are provided below the insertion holes 21 on both sides of the body 2, and an arc-shaped positioning groove 25 is opened on the top surface of the extension part 24 for installation positioning to ensure that the heights of the inner blade and the outer blade are equal during edge grinding.

[0025] The bottom surface of the scale chassis 1 has an inner groove 11, and the nut connecting the lower end of the screw is located in the inner groove 11. A magnet (not shown in the figure) is installed in the scale chassis 1.

[0026] During use, the shanks of the inner blade 5 and the outer blade of the drill are respectively inserted into the insertion holes 21 on both sides of the body 2. After adjusting the appropriate axial position, they are correspondingly pressed by a plurality of pressing bolts 23. Then loosen the nut at any end of the screw 3, and adjust the rotation angle of the body 1 according to the scale on the scale chassis 1, so as to control the edge inclination angle and adjust the tool angle to make the cutting edge perpendicular to the grinding head, and the edge inclination angle designed on the tool drawing can be accurately controlled, with strong versatility. Then tighten the nut again to complete the clamping and adjustment of the inner blade 5 and the outer blade of the drill. Finally, the whole device of the present invention equipped with the inner blade and the outer blade is placed at the designated position on the tooling table and magnetically fixed for convenient edge grinding operation. Refer to the state diagram of the inner blade 5 after installation Figure 3 . After edge grinding, it is required that the L distances of the inner blade 5 and the outer blade are equal.

Claims

1. A grinding device for a deep-hole drill bit, comprising a rectangular body, characterized in that, Insertion holes are symmetrically opened on the front and rear sides of the body, and a plurality of compression holes with internal threads are symmetrically opened on the left and right sides. The end of the compression bolt passes through the compression hole and is inserted into the insertion hole. A circular scale chassis is provided at the bottom of the body, and the body and the scale chassis are connected by a screw rod and a nut.

2. The edge grinding device for the deep hole drill bit according to claim 1, characterized in that, Extension parts are provided below the insertion holes on both sides of the body.

3. The edge grinding device for the deep hole drill bit according to claim 2, characterized in that, An arc-shaped positioning groove is opened on the top surface of the extension part.

4. The edge grinding device for the deep hole drill bit according to any one of claims 1-3, characterized in that The screw rod is a center double-headed screw rod.

5. The grinding device for the deep hole drill bit according to any one of claims 1-3, characterized in that The bottom surface of the scale chassis has an inner groove, and the nut connecting the lower end of the screw rod is located in the inner groove.

6. The edge grinding device for the deep hole drill bit according to claim 5, characterized in that A magnet is embedded in the scale chassis.

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