Deep hole drill convenient to retract

Abstract

The deep hole drill convenient to retract comprises a tool handle, the tool handle is connected with a deep hole drill tool body, and the deep hole drill tool body comprises a plurality of spiral deep hole drill tool bodies. The end face of the deep hole drilling tool body comprises a tool body part at the sharp position, and the tool body part is connected with a smooth tool retracting part. The cutter body part is used for rotating the drilling executing part in butt joint with materials when deep hole drilling is carried out, deep hole drilling is completed, the smooth tool retracting part is used for smoothly making contact with the hole wall and avoiding scratching the butt joint part when reverse drilling is carried out after deep hole drilling is completed, and the deep hole drilling setting structure facilitating tool retracting is formed through combination.

Description

Technical Field

[0001] The utility model relates to precision machining equipment and the cutting tools used thereby, and particularly to a deep hole drill which is convenient for tool withdrawal. Background Art

[0002] During the process of deep hole drilling, after the deep hole drilling is completed, it is necessary to withdraw the drill bit from the processed deep hole. Since the diameter of the deep hole is close to the size of the drill bit, it is necessary to withdraw the drill bit while it is rotating to avoid jamming of the drill bit. However, during the tool withdrawal process, the rotation of the drill bit is likely to touch the inner wall of the deep hole, resulting in unqualified processed deep holes.

[0003] Therefore, it is necessary to provide a deep hole drill which is convenient for tool withdrawal to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a deep hole drill which is convenient for tool withdrawal.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A deep hole drill which is convenient for tool withdrawal includes a tool shank, and the tool shank is connected with a deep hole drill body. The deep hole drill body includes a plurality of spiral deep hole drill bodies.

[0007] The end face of the deep hole drill body includes a tool body part at the sharp part, and the tool body part is connected with a smooth tool withdrawal part.

[0008] The tool body part is used as the drilling processing execution part for rotating and docking materials during deep hole drilling to complete deep hole drilling. The smooth tool withdrawal part is used as the docking part for smoothly contacting the hole wall during reverse drilling after deep hole drilling is completed to avoid scratching, and they are combined to form a set structure of a deep hole drill which is convenient for tool withdrawal.

[0009] Further, the number of the deep hole drill bodies is several.

[0010] Further, the number of the deep hole drill bodies is an odd number.

[0011] Further, the number of the deep hole drill bodies is 3 or 5.

[0012] Further, the smooth tool withdrawal part is an arc-shaped connecting body.

[0013] Further, the smooth tool withdrawal part is a connecting body formed by docking a plurality of continuously tapered arc shapes.

[0014] Further, the smooth tool withdrawal part includes at least 2 tapered circular arcs, one of which is a circular arc with a diameter of 2 mm, and the other is a circular arc with a diameter of 1.8 mm.

[0015] Further, the surface of the deep hole drill body is coated with a high-temperature resistant coating.

[0016] Compared with the prior art, the utility model is provided with a smooth tool retraction portion, and after the deep hole drilling is completed, the tool retraction portion can be smoothly contacted with the hole wall during back drilling to avoid scratching the docking portion, thereby ensuring the processing quality of the deep hole drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 Schematic diagram of the deep hole drill body. DETAILED DESCRIPTION

[0019] Example:

[0020] See also Figure 1-2 This embodiment shows a deep hole drill that is easy to withdraw, including a handle 1, the handle 1 is connected to a deep hole drill body 2, and the deep hole drill body 2 includes a plurality of spiral deep hole drill bodies 3;

[0021] The end surface of the deep hole drill body 3 includes a sharp cutter body portion 31, and the cutter body portion 31 is connected to a smooth cutter retreat portion 32;

[0022] The cutter body 31 is used as the drilling execution part for rotating the docking material during deep hole drilling to complete the deep hole drilling process. The smooth tool retraction part 32 is used to smoothly contact the hole wall during back drilling after the deep hole drilling process is completed to avoid scratching the docking part. The combination forms a deep hole drilling setting structure that is easy to retract.

[0023] The number of deep hole drill bodies 3 is several.

[0024] The number of deep hole drill bodies 3 is an odd number.

[0025] The number of the deep hole drill bodies 3 is 3 or 5.

[0026] The smooth retreat portion 32 is an arc-shaped connecting body.

[0027] The smooth retreat portion 32 is a plurality of continuously tapered arc-shaped connecting bodies.

[0028] The smooth knife-retracting portion 32 includes at least two tapered arcs, one of which is an arc with a diameter of 2 mm, and the other is an arc with a diameter of 1.8 mm.

[0029] The surface of the deep hole drill cutter body 3 is coated with a high temperature resistant coating.

[0030] Compared with the prior art, the utility model is provided with a smooth tool retraction portion, and after the deep hole drilling is completed, the tool retraction portion can be smoothly contacted with the hole wall during back drilling to avoid scratching the docking portion, thereby ensuring the processing quality of the deep hole drilling.

[0031] The above are only some embodiments of the present utility model. For those of ordinary skill in the art, without departing from the creative concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. A deep hole drill that is easy to withdraw, characterized in that: The tool holder comprises a deep hole drill cutter body connected to the tool holder, and the deep hole drill cutter body comprises a plurality of spiral deep hole drill cutter bodies; The end face of the deep hole drill body includes a cutter body portion at a sharp point, and the cutter body portion is connected to a smooth cutter retreat portion; The cutter body is used as the drilling execution part to rotate the docking material during deep hole drilling to complete the deep hole drilling process. The smooth tool retraction part is used to smoothly contact the hole wall during back drilling after the deep hole drilling process is completed to avoid scratching the docking part. The combination forms a deep hole drilling setting structure that is easy to retract.

2. A deep hole drill for easy retraction according to claim 1, characterized in that: The number of deep hole drill bodies is several.

3. A deep hole drill for easy retraction according to claim 1 or 2, characterized in that: The number of deep hole drill bodies is an odd number.

4. A deep hole drill for easy retraction according to claim 3, characterized in that: The number of deep hole drill bodies is 3 or 5.

5. The deep hole drill for easy retraction according to claim 4, characterized in that: The smooth knife withdrawal portion is an arc-shaped connector.

6. The deep hole drill for easy retraction according to claim 5, characterized in that: The smooth knife withdrawal portion is a plurality of continuously tapered arc-shaped butt-jointed connecting bodies.

7. The deep hole drill for easy retraction according to claim 6, characterized in that: The smooth knife withdrawal portion includes at least two tapered arcs, one of which is an arc with a diameter of 2 mm, and the other is an arc with a diameter of 1.8 mm.

8. The deep hole drill for easy retraction according to claim 7, characterized in that: The surface of the deep hole drill cutter body is coated with a high temperature resistant coating.

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