Forming hole extruding cutter

Abstract

The forming hole extruding cutter comprises a cutter handle, the cutter handle is connected with a cutter body portion, the cutter body portion comprises a cutter body located at the tail end, the cutter body is in a polygonal shape, a plurality of acute angle portions of the polygon form tip contact cutting edges, and areas between the adjacent tip contact cutting edges form material avoiding areas for hole extruding forming. And the cutter body is provided with an inclined cutter entering part opposite to the cutter handle, and is provided with a machining chip discharging slope facing the cutter handle.

Description

Technical Field

[0001] The utility model relates to precision processing equipment and a tool used therefor, in particular to a forming hole extrusion tool. Background Art

[0002] Internal hole forming is a common mechanical processing method. The extrusion forming cutter currently used is generally a round cutter head with a tapered insertion portion and an annular avoidance groove on the cutter body. Due to the opening of the avoidance groove, the overall strength of the cutter body of the current extrusion forming cutter is low and the processing is difficult.

[0003] Therefore, it is necessary to provide a forming hole extrusion knife to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a forming hole extrusion knife.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A forming hole extrusion knife includes a knife handle connected to a knife body, the knife body including a knife body at the end, the knife body is polygonal, and a plurality of acute angles of the polygon form a tip contacting a blade, and adjacent tips contact an area between the blades to form a material avoidance area for hole extrusion forming;

[0007] The cutter body has an inclined cutting portion facing away from the tool holder and a chip discharge slope facing the tool holder.

[0008] Furthermore, a blade processing body plane portion is provided between the inclined cutting portion and the chip discharge slope on the cutter body.

[0009] Furthermore, the inclined cutting portion and the chip discharge slope on the cutter body are at an angle of 114 degrees.

[0010] Furthermore, the tip contacting blade has a blade flat point area.

[0011] Furthermore, the width of the flat point area of ​​the blade portion is 0.08-0.1 mm.

[0012] Furthermore, the cutter body includes a connecting column, which is cylindrical and has a diameter of 80-85% of a processing circle formed by rotating the plurality of acute angle portions.

[0013] Furthermore, the width difference between the connecting column and the cutter body forms a chip discharge area.

[0014] Furthermore, the connecting column is connected to the tool handle via a gentle slope.

[0015] Furthermore, the gradient of the transition slope is 60-65 degrees.

[0016] Compared with the existing ones, the utility model uses a polygonal cutter body, and several sharp corners of the polygon form a tip contacting the blade, and the area between adjacent tip contacting the blade forms a material avoidance area for extrusion forming. The processing difficulty is low, and there is no need to process the avoidance groove area of ​​the cutter body, which reduces the damage to the overall strength of the cutter body. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a schematic diagram of the inclined cutting part and the chip discharge slope of the utility model.

[0019] Figure 3 Schematic diagram of the structure of the knife body.

[0020] Figure 4 Figure 3 Enlarged view of part A. DETAILED DESCRIPTION

[0021] Example:

[0022] See Figure 1-4 This embodiment shows a forming hole extrusion knife, including a knife handle 1, the knife handle 1 is connected to a knife body 2, the knife body 2 includes a knife body 3 located at the end, the knife body 3 is polygonal, and a plurality of acute angles of the polygon form a tip contact blade 31, and the area between adjacent tip contact blades 31 forms a material avoidance area 32 for hole extrusion molding;

[0023] The tool body 3 has an inclined cutting portion 33 facing away from the tool handle 1 and a chip discharge slope 34 facing the tool handle 1 .

[0024] A blade processing body flat surface portion 35 is provided between the inclined cutting portion 33 and the chip discharge slope 34 on the cutter body.

[0025] The inclined cutting portion 33 and the chip discharge slope 34 on the cutter body are at an angle of 114 degrees.

[0026] The tip contact blade 31 has a blade flat point area 36 .

[0027] The width of the flat point area 36 of the blade portion is 0.08-0.1 mm.

[0028] The cutter body 2 includes a connecting column 4, which is cylindrical and has a diameter of 80-85% of a processing circle formed by rotating a plurality of acute angle portions.

[0029] The width difference between the connecting column 4 and the cutter body 3 forms a chip discharge area.

[0030] The connecting column 4 is connected to the tool handle 1 through a gentle slope 5 .

[0031] The gradient of the transition slope 5 is 60-65 degrees.

[0032] Compared with the existing ones, the utility model uses a polygonal cutter body, and several sharp corners of the polygon form a tip contacting the blade, and the area between adjacent tip contacting the blade forms a material avoidance area for extrusion forming. The processing difficulty is low, and there is no need to process the avoidance groove area of ​​the cutter body, which reduces the damage to the overall strength of the cutter body.

[0033] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A forming hole extrusion knife, characterized by: The knife body comprises a knife handle connected to the knife handle, the knife body comprises a knife body at the end, the knife body is polygonal, and a plurality of acute angles of the polygon form a tip contacting a knife edge, and an area between adjacent tips contacting the knife edges to form a material avoidance area for extrusion forming; The cutter body has an inclined cutting portion facing away from the tool holder and a chip discharge slope facing the tool holder.

2. The forming hole extrusion knife according to claim 1, characterized in that: The blade processing body flat portion is provided between the inclined cutting portion and the chip discharge slope on the blade body.

3. The forming hole extrusion knife according to claim 2, characterized in that: The inclined cutting part and chip discharge slope on the cutter body are at an angle of 114 degrees.

4. The forming hole extrusion knife according to claim 3, characterized in that: The tip contact blade has a blade flat point area.

5. The forming hole extrusion knife according to claim 4, characterized in that: The width of the flat point area of ​​the blade is 0.08-0.1mm.

6. The forming hole extrusion knife according to claim 5, characterized in that: The cutter body comprises a connecting column, which is cylindrical and has a diameter of 80-85% of a processing circle formed by rotating a plurality of acute angle parts.

7. The forming hole extrusion knife according to claim 6, characterized in that: The width difference between the connecting column and the cutter body forms a chip discharge area.

8. The forming hole extrusion knife according to claim 7, characterized in that: The connecting column is connected to the tool handle through a gradual slope.

9. The forming hole extrusion knife according to claim 8, characterized in that: The gradient of the transition slope is 60-65°.

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