CN105397155A - Two-tooth countersinking tool - Google Patents

Abstract

The invention belongs to the field of mechanical processing and provides a two-tooth scribing tool, comprising: a cutter body and a guide cylinder, the front end of the guide cylinder is a cylinder and the rear end is a tapered cylinder, the front end of the cutter body is processed with a rectangular groove surface, and the center of the rectangular groove surface is tapered The taper cylinder is inserted into the taper hole from the front; the front end of the rake face on each side of the cutter body is processed with a reverse slope to form the flank face of the cutter teeth, and the upper surface of the cutter body is processed with a curved surface to form the rake face of the cutter teeth. The side of the body is processed with a curved surface to form the secondary flank of the cutter tooth. The flank and the rake face intersect to form the main cutting edge. The rake face and the secondary flank intersect to form the secondary cutting edge. There are steps in the processing; the rear end of the cutter body is processed with a handle, the handle is coaxial with the taper hole, and the handle is connected with the pneumatic tool backward.

Description

A two-tooth piercing tool

technical field

The invention belongs to the field of mechanical processing and relates to a two-tooth piercing tool.

Background technique

When machining holes with a diameter larger than that of the Jiao on composite parts, we usually use a circular scribing drill, which is composed of a ring-shaped cutter head and a cutter bar. Since composite material parts usually have relatively large structural dimensions, their thickness is generally 8 to 3MM. At the same time, it is often encountered that the surface of composite material parts is composed of irregular curved surfaces. When machining holes on the surface, a certain degree of difficulty is added. Especially when machining a round hole with a relatively large aperture size, it is often encountered that the circular slitting drill cannot work normally on the pneumatic tool, such as: due to the relatively large machining hole of the part, the cutting amount of the tool is too large, resulting in large The cutting resistance makes the pneumatic tool unable to rotate. Sometimes during the cutting process, the chips of the composite material may also fill up the toothed groove of the circular scribing drill and affect the normal work of the tool.

Contents of the invention

The technical problem to be solved by the present invention is to provide a two-tooth piercing cutter, which can avoid the phenomenon of cutter blocking under different working conditions, and can smoothly remove chips and improve processing efficiency at the same time.

The technical solution of the present invention: a two-tooth piercing cutter, comprising:

Cutter body (1) and guide cylinder (2), the front end of guide cylinder (2) is a cylinder (12) and the rear end is a tapered cylinder (13), the front end of cutter body (1) is processed with a rectangular groove surface (3), the rectangular groove surface (3) A taper hole (11) is opened in the center, a taper cylinder (13) is inserted into the taper hole (11) from the front and the taper cylinder (13) is interference fit with the taper hole (11);

The front end of the rake face on each side of the cutter body (1) is processed with a flank face (4) formed by a reverse slope, and a rake face (5) formed by a curved surface is processed on the upper surface of the cutter body. The side surface is processed with a curved surface forming the auxiliary flank (6) of the cutter tooth, the flank (4) and the rake face (5) intersect to form the main cutting edge (7), the rake face (5) and the auxiliary flank The surfaces (6) intersect to form a secondary cutting edge (8), and a step (9) is also processed on the top of the cutter body; the rear end of the cutter body is processed with a handle (10), and the handle (10) and the taper hole (11 ) coaxial, and the handle of a knife (10) is connected with the pneumatic tool backward.

Further, the flank (4) forms a relief angle α=10°-15° with the cutting speed direction, the rake face (5) forms a rake angle γ=10°-15° with the direction perpendicular to the cutting speed, and the auxiliary flank (6) A secondary relief angle β=8°-10° is formed with the cutting speed direction.

The beneficial effect of the present invention: it can ensure that the pneumatic tool can rotate freely when processing composite material parts with relatively large apertures, and there will be no jamming of the tool under different working conditions, and smooth chip removal can improve the processing efficiency at the same time More than 2 times.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the piercing tool of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the cutter body (1) of the present invention.

Fig. 3 is a structural schematic diagram of the guide cylinder (2) of the present invention.

Fig. 4 is a schematic structural view of the cutter body (1) of the present invention.

FIG. 5 is a schematic cross-sectional view along D-D of FIG. 4 .

FIG. 6 is a schematic diagram of the view along the A direction of FIG. 4 .

FIG. 7 is a schematic cross-sectional view along line E-E of FIG. 6 .

detailed description

Technical scheme of the present invention comprises:

Cutter body (1) and guide cylinder (2), the front end of guide cylinder (2) is a cylinder (12) and the rear end is a tapered cylinder (13), the front end of cutter body (1) is processed with a rectangular groove surface (3), the rectangular groove surface (3) A taper hole (11) is opened in the center, a taper cylinder (13) is inserted into the taper hole (11) from the front and the taper cylinder (13) is interference fit with the taper hole (11);

The front end of the rake face on each side of the cutter body (1) is processed with a flank face (4) formed by a reverse slope, and a rake face (5) formed by a curved surface is processed on the upper surface of the cutter body. The side surface is processed with a curved surface forming the auxiliary flank (6) of the cutter tooth, the flank (4) and the rake face (5) intersect to form the main cutting edge (7), the rake face (5) and the auxiliary flank The surfaces (6) intersect to form a secondary cutting edge (8), and a step (9) is also processed on the top of the cutter body; the rear end of the cutter body is processed with a handle (10), and the handle (10) and the taper hole (11 ) coaxial, and the handle of a knife (10) is connected with the pneumatic tool backward.

Further, the flank (4) forms a relief angle α=10°-15° with the cutting speed direction, the rake face (5) forms a rake angle γ=10°-15° with the direction perpendicular to the cutting speed, and the auxiliary flank (6) A secondary relief angle β=8°-10° is formed with the cutting speed direction.

The present invention will be described in further detail below by way of examples.

Example

Referring to Fig. 1-Fig. 7, a two-tooth piercing tool is composed of a cutter body (1) and a guide cylinder (2). One end of the cutter body (1) is processed with cutter teeth for cutting workpieces. The other end of cutter body is processed with handle of a knife (10), and handle of a knife (10) is used for the installation of pneumatic tool. The guide cylinder (2) is installed in the tapered hole (11) of the cutter body (1). Form a complete two-tooth piercing tool. One end of the cutter body (1) is processed with a rectangular groove surface (3) to ensure the effective width (B) of the cutter tooth and the length (H) of the cutter tooth, and is processed with an inclined surface to form the flank of the cutter tooth (4), A rake surface (5) with a curved surface forming cutter teeth is processed on the upper surface of the cutter body. A secondary flank (6) with a curved surface forming cutter teeth is processed on the side of the cutter body. The flank (4) intersects with the rake face (5) to form a main cutting edge (7), and the rake face (5) intersects with a secondary flank (6) to form a secondary cutting edge (8). Also be processed with step (9) above cutter body, be to form the effective thickness of cutter tooth. A cylinder is processed at the other end of the cutter body to be a handle of a knife (10). On the rectangular groove surface (3) of cutter body, be processed with taper hole (11) and coaxial with the axial center of knife handle (10), the purpose of taper hole (11) is to be with the taper cylinder ( 13) Match. One end of the guide cylinder (2) is a cylinder (12) with a semicircular head, and the other end is a tapered cylinder (13), which matches the tapered hole (11).

The flank (4) forms a relief angle α=10°-15° with the cutting speed direction, the rake surface (5) forms a rake angle γ=10°-15° perpendicular to the cutting speed direction, and the auxiliary flank (6) Form secondary relief angle β=8°-10° with cutting speed direction.

The working principle of the present invention is:

Install the guide cylinder (2) in the tapered hole (11) of the cutter body (1). Form a complete two-tooth piercing tool. Since the hole diameter of the slitting tool is relatively large, in order to ensure the stability of the tool when processing the part or product, the positioning initial hole must be processed on the part or product first. The semicircular head cylinder (12) on (2) is corresponding. When using this scribing tool to process a hole, first extend the semicircular head cylinder (12) on the guide cylinder (2) into the positioning hole of the part or product, and position the scribing tool through the positioning hole to ensure that the hole processed by the scribing tool Concentric with the positioning hole of the part or product.

The following table provides the parameters of 3 embodiments of the present invention

example 1 Example 2 Example 3 A 50 70 90 K 15 20 25 h 8 9 10 B 8 9 12 gamma 10° 12° 13° beta 10° 8° 10° alpha 10° 8° 10°

Claims (2)

1. two teeth draw a spot facing cutter, it is characterized in that, comprising:

Cutter hub (1) and guide cylinder (2), guide cylinder (2) front end is cylinder (12) rear end is tapering cylinder (13), cutter hub (1) front end is processed with rectangle groove face (3), tapered hole (11) is opened at rectangle groove face (3) center, and tapering cylinder (13) inserts tapered hole (11) from front and tapering cylinder (13) and tapered hole (11) interference fit;

The every rake face front end, side of cutter hub (1) is processed with the rear knife face (4) that reverse slope forms cutter tooth, the rake face (5) of Surface forming cutter tooth is processed with at the upper surface of cutter hub, the minor flank (6) of Surface forming cutter tooth is processed with in the side of cutter hub, rear knife face (4) and rake face (5) intersect, form main cutting edge (7), rake face (5) and minor flank (6) intersect, form front cutting edge (8), on cutter hub, be also processed with step (9); The rear end of cutter hub is processed with handle of a knife (10), and handle of a knife (10) is coaxial with tapered hole (11), and described handle of a knife (10) is connected with pneumatic tools backward.

2. a kind of two teeth draw spot facing cutter as claimed in claim 1, it is characterized in that, rear knife face (4) and cutting speed direction form °-15 °, relief angle α=10, rake face (5) and cutting speed vertical direction form °-15 °, anterior angle γ=10, and minor flank (6) and cutting speed direction form °-10 °, front clearance β=8.