CN220659324U - Trepanning cutter - Google Patents

Abstract

The utility model provides a trepanning cutter convenient for chip removal, and relates to the technical field of cutting tools. The material sleeving cutter comprises a cutter body and a plurality of material sleeving blades which are arranged at the front end of the cutter body and circumferentially arranged along the axis of the cutter body, wherein the material sleeving blades are arranged on concentric circles with different radiuses and with the axis of the cutter body as the center, and cutting edges of the material sleeving blades on adjacent concentric circles are arranged in a crossed cutting mode. The utility model is more beneficial to the discharge of scrap iron from the outside, the processing efficiency is higher, and the cutter is especially suitable for deep hole trepanning processing with narrower scrap containing space.

Description

Trepanning cutter

Technical Field

The utility model relates to the technical field of cutting tools, in particular to a trepanning tool.

Background

The trepanning cutter comprises a cutter body and a trepanning cutter blade arranged at the front end of the cutter body, wherein the cutter body is generally hollow and cylindrical, and the trepanning cutter is a necessary cutter in deep hole processing technology. The trepanning cutter has the following advantages: under the condition that the workpiece and the cutter rotate, the metal cutting rate is higher; when the workpiece material is expensive or the core is to be tested and analyzed, the complete material core material can be reserved, so that the cost is reduced.

The nuclear power product and the power station product belong to special forging materials, and belong to difficult-to-process materials, and at present, in the trepanning processing, particularly in the deep hole trepanning processing process, the existing trepanning cutter has the conditions of difficult discharge of scrap iron and easy tipping, and the processing efficiency is affected.

Disclosure of Invention

The utility model aims to provide a trepanning cutter convenient for chip removal.

The technical scheme adopted for solving the technical problems is as follows: the material sleeving cutter comprises a cutter body and a plurality of material sleeving blades which are arranged at the front end of the cutter body and circumferentially arranged along the axis of the cutter body, wherein the material sleeving blades are arranged on concentric circles with different radiuses and with the axis of the cutter body as the center, and cutting edges of the material sleeving blades on adjacent concentric circles are arranged in a crossed cutting mode.

Further, the nesting blades are provided with even handles, and are correspondingly arranged in pairs.

Further, the trepanning blade is a hexagonal blade and is formed by chamfering the regular triangle blade to one side,

further, two corresponding nesting blades are oppositely arranged.

Further, the trepanning blade is formed by chamfering a regular triangle blade to one side by 40 °.

Further, the trepanning blades on the concentric circle with the largest radius are correspondingly arranged with the trepanning blades on the concentric circle with the smallest radius.

Further, the jacking blade is fixed on the cutter body through a diagonal screw arranged along the tangential direction of the cutter body.

Further, a guide key is arranged on the periphery of the cutter body.

The beneficial effects of the utility model are as follows: according to the trepanning cutter, as the cutting edges of the trepanning blades on the adjacent concentric circles are arranged in a cross cutting manner, the iron filings taken down in the trepanning process can be divided into smaller iron filings, so that the iron filings are more favorably discharged from the outside, the processing efficiency is higher, and the cutter is particularly suitable for deep hole trepanning processing with narrower chip containing space.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the mounting structure of the trepanning blade;

FIG. 3 is a cross-sectional view taken along line F-F of FIG. 2;

FIG. 4 is a schematic view of a cutting edge cross-draft arrangement of a trepanning blade;

FIG. 5 is a schematic view of the opposite installation of a correspondingly positioned trepanning blade;

FIG. 6 is a schematic view of an arrangement of stay screws;

the figure shows: the tool comprises a tool body 1, a trepanning blade 2, concentric circles 3, a tool holder 4, a diagonal screw 5, a guide key 6, a chip groove 11 and a cutting edge 21.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

As shown in fig. 1 to 3, the trepanning cutter of the present utility model comprises a cutter body 1 and a plurality of trepanning blades 2 arranged at the front end of the cutter body 1 and circumferentially arranged along the axis of the cutter body 1, wherein the cutter body 1 is cylindrical, chip grooves 11 are arranged on the cutter body 1, the trepanning blades 2 are mounted on concentric circles 3 with different radiuses centered on the axis of the cutter body 1, and cutting edges 21 of the trepanning blades 2 on adjacent concentric circles 3 are arranged in a cross-cutting manner.

The number of trepanning blades 2 may be 2 or any number above 2. The trepanning blades 2 are mounted on concentric circles 3 of different radii centered on the axis of the cutter body 1, i.e. the distance from the trepanning blades 2 to the axis of the cutter body 1 is arranged from near to far, to achieve a portion of the material cut per trepanning blade 2. The cutting edges 21 of the trepanning blades 2 on the adjacent concentric circles 3 are disposed to intersect and draft, as shown in fig. 3, that is, when the two blades of the adjacent concentric circles 3 are moved to the same straight line in the radial direction of the blade body 1, the cutting edges 21 thereof intersect each other.

The trepanning cutter of the present utility model performs trepanning cutting through the cutting edge 21 of the trepanning blade 2, and each trepanning blade 2 cuts a portion of the material. In the utility model, as the cutting edges 21 of the trepanning blades 2 on the adjacent concentric circles 3 are arranged in a cross cutting way, the iron filings which are sleeved and removed can be separated into smaller iron filings in the processing process, thereby being more beneficial to the discharge of the iron filings from the outside.

The nesting blades 2 may be odd or even in number, and in order to ensure that the forces on the cutter are more balanced, reduce vibration during machining of the cutter, etc., it is preferable that the nesting blades 2 be even in number and are correspondingly arranged in pairs (see fig. 2). In such a way, the stress on the two sides of the cutter body 1 is more balanced during processing.

The trepanning blade 2 may be a triangular, prismatic or rectangular blade, etc. In the utility model, the trepanning blade 2 is a hexagonal blade and is formed by chamfering the regular triangle blade to one side. The chamfer angle may be arbitrarily set, typically at 20 ° to 60 °, and in the present utility model, the chamfer angle is preferably 40 °. When the chamfer angle is 40 degrees, practice shows that the chamfering tool is least prone to tipping. As shown in fig. 4, the trepanning blade 2 can form a U-shaped cutting edge after being installed, the stress is more balanced, the vibration of a cutter can be reduced, and the cutting edge is not easy to collapse during processing. In addition, a plurality of cross points can be formed between the cutting edges of the sleeve blades 2 on the adjacent concentric circles, so that the sleeved scrap iron can be separated into smaller pieces, and the scrap removal is facilitated. In order to better ensure that the forces of the cutter are more balanced, the vibration is reduced, and the two corresponding material sleeving blades 2 are oppositely arranged (see figure 5). Thus, the stress on the two sides of the cutter is more balanced, and the vibration is smaller.

Since the outermost and innermost trepanning blades 2 have the largest cutting area and the greatest stress, optimally, the trepanning blades 2 on the concentric circle having the largest radius are disposed corresponding to the trepanning blades 2 on the concentric circle having the smallest radius. That is, the outermost trepanning blade 2 is provided corresponding to the innermost trepanning blade 2. The arrangement is also beneficial to ensuring the stress balance of the cutter and reducing the processing vibration.

The stock insert 2 may be mounted on the cutter body 1 directly or by means of a holder. In the embodiment of the utility model, the trepanning blade 2 is mounted on the cutter body 1 through the cutter holder 4. The trepanning blade 2 may be fixed by welding or bolting, and in fig. 6, in order to better fix the trepanning blade 2, the trepanning blade 2 is fixed on the cutter body 1 by a diagonal screw 5 disposed along the tangential direction of the cutter body 1.

In order to further reduce the vibrations, the outer circumference of the blade body 1 is provided with guide keys 6. The guide key 6 may be a gold guide key and/or a bakelite guide key.

Claims (8)

1. The utility model provides a trepanning cutter, includes cutter body (1) and a plurality of trepanning blades (2) that set up at cutter body (1) front end and arrange along the axis circumference of cutter body (1), its characterized in that: the trepanning blades (2) are arranged on concentric circles with different radiuses and taking the axis of the cutter body (1) as the center, and cutting edges (21) of the trepanning blades (2) on adjacent concentric circles are arranged in a cross cutting mode.

2. The trepanning tool of claim 1 wherein: the nesting blades (2) are arranged in a pair of corresponding mode, wherein the number of the nesting blades is even.

3. The trepanning tool of claim 2 wherein: the jacking blade (2) is a hexagonal blade and is formed by chamfering the regular triangle blade to one side.

4. A trepanning tool according to claim 3 wherein: the two corresponding nesting blades (2) are oppositely arranged.

5. A trepanning tool according to claim 3 wherein: the trepanning blade (2) is formed by chamfering a regular triangle blade to one side by 40 degrees.

6. The trepanning tool of claim 3, 4 or 5 wherein: the trepanning cutter blades (2) on the concentric circle with the largest radius are correspondingly arranged with the trepanning cutter blades (2) on the concentric circle with the smallest radius.

7. The trepanning tool of claim 1 wherein: the trepanning blade (2) is fixed on the cutter body (1) through a diagonal screw (5) arranged along the tangential direction of the cutter body (1).

8. The trepanning tool of claim 1 wherein: the periphery of the cutter body (1) is provided with a guide key (6).