阅读说明：本技术 一种前定位深孔拉铰刀 (Front positioning deep hole broaching reamer ) 是由 刘战锋 杜登攀 张�浩 徐凯 李永安 于 2020-12-29 设计创作，主要内容包括：一种前定位深孔拉铰刀,包括刀体,所述刀体一端设置有切削部,另一端设置有螺纹连接部位,刀体中间设置有导向柱,所述切削部与导向柱之间有连接部,导向柱与螺纹连接部位之间有连接部。本发明避免因加工深孔时的孔的偏斜,大大提高了加工效率和成品率。(The front-positioning deep-hole broaching reamer comprises a reamer body, wherein one end of the reamer body is provided with a cutting part, the other end of the reamer body is provided with a threaded connection part, a guide column is arranged in the middle of the reamer body, a connecting part is arranged between the cutting part and the guide column, and a connecting part is arranged between the guide column and the threaded connection part. The invention avoids the deflection of the hole when processing the deep hole, and greatly improves the processing efficiency and the yield.)

1. The front-positioning deep-hole broaching reamer is characterized by comprising a reamer body (1), wherein one end of the reamer body (1) is provided with a cutting part (2), the other end of the reamer body is provided with a threaded connection part (6), a guide column (4) is arranged in the middle of the reamer body (1), a connection part (3) is arranged between the cutting part (2) and the guide column (4), and a connection part (5) is arranged between the guide column (4) and the thread (6).

2. A front positioning deep hole reamer according to claim 1, wherein the cutting portion (2) is provided with 4 insert grooves (8) and 4 chip removal portions (9) at equal intervals around the circumference of the reamer body, and the insert grooves (8) are welded with the inserts (7).

3. A front positioning deep hole broaching reamer according to claim 2, characterized in that the blade groove (8) is a convex obtuse angle structure, a chip removal part (9) is arranged at the concave part of the surface of the convex end close to the cutting part (2), and the chip removal part (9) is an inclined surface.

4. A front positioning deep hole reamer according to claim 1, wherein the guide portion (4) has 4 guide slots (11) and 4 cooling slots (12) equally spaced around the circumference of the cutter body.

5. A front positioning deep hole broaching reamer according to claim 4, characterized in that the self-made shape guide block (10) is welded on the guide groove (11).

6. A front positioning deep hole reamer according to claim 4, wherein the cooling slots (12) are grooves of a right angle configuration.

7. A front positioning deep hole broaching reamer according to claim 1, characterized in that the threaded connection portion (6) is a square thread.

Technical Field

The invention relates to the technical field of deep hole machining, in particular to a front positioning deep hole broaching reamer.

Background

In the existing deep hole reaming process, the cutter generates violent vibration during cutting, so that the straightness of deep hole machining is often influenced, and the machined hole is greatly deflected, thereby causing waste products and failing to meet the machining requirements.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a front positioning deep hole broaching tool, which can reduce tool body vibration during cutting, avoid hole deflection caused by deep hole machining and greatly improve machining efficiency and yield.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a preceding location deep hole reamer, includes cutter body 1, cutter body 1 one end is provided with cutting portion 2, and the other end is provided with threaded connection position 6, is provided with guide post 4 in the middle of the cutter body 1, there is connecting portion 3 between cutting portion 2 and the guide post 4, has connecting portion 5 between guide post 4 and the threaded connection position 6.

The cutting part 2 on distribute 4 blade grooves 8 and 4 chip removal positions 9 around cutter body circumference at intervals, welding blade 7 on the blade groove 8.

Blade groove 8 is bellied obtuse angle structure, and the bellied end is pressed close to the surperficial depressed part of cutting portion 2 and is provided with chip removal position 9, chip removal position 9 is the inclined plane.

4 guide grooves 11 and 4 cooling grooves 12 are distributed on the guide part 4 at intervals around the circumference of the cutter body.

The self-made shape guide block 10 is welded on the guide groove 11.

The cooling groove 12 is a groove with a right-angle structure.

The thread connecting part 6 is provided with square thread.

The invention has the beneficial effects that:

the invention can reduce the vibration of the cutter body during cutting, meet the requirement of machining precision during deep hole machining, and greatly improve the machining efficiency and the yield.

The cutter has the characteristics of simple structure, vibration suppression, deflection prevention, straightness guarantee and workpiece machining size precision guarantee, and can be widely used for reaming of the through deep hole.

The cutting part of the invention is alternately distributed with 4 blade grooves and 4 chip removal parts around the circumference of the cutter body, and the chip removal part is an inclined plane and has large space, thus being beneficial to smooth chip removal.

The guide part of the invention is provided with 4 guide grooves and 4 cooling grooves at intervals around the circumference of the cutter body, and the cooling grooves have the functions of increasing the input of cooling liquid, eliminating heat and ensuring smoother chip removal.

The blade groove is welded with the blade, and the welding blade is economical, practical, firm and reliable.

The guide block is welded on the guide groove, plays a role in guiding and supporting, and can effectively inhibit vibration and prevent deflection.

The thread connecting part of the invention is provided with the square thread, and the connection straightness of the square thread and the cutter bar is good, and the disassembly and the assembly are convenient.

Drawings

FIG. 1 is a front view of the overall structure of the present invention

FIG. 2 is a sectional view taken along line A-A of FIG. 1

Fig. 3 is a sectional view taken along line B-B of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, the front positioning deep hole broaching reamer is composed of a reamer body 1 and a blade 7, wherein the blade 7 is made of hard alloy. A plurality of blade grooves 8 are uniformly distributed on the cutter body 1 along the periphery, and the blades 7 are fixed in the blade grooves 8 by brazing. A section of cylinder is arranged in the middle of the cutter body 1 and serves as a guide post 4 for ensuring the machining stability of the cutter in a hole, a plurality of guide grooves 11 and cooling grooves 12 are uniformly distributed on the guide post, a guide block is fixed in the guide grooves 11 through brazing, and cooling liquid passes through the cooling grooves 12. The handle of the cutter body 1 is a section of threaded connection part 6 matched with the cutter rod.

The cutter teeth are an important parameter of the reamer. The cooling groove is used for reducing heat generated during machining and ensuring machining precision. The guide post 4 is used for ensuring the processing stability of the cutter in the hole. The guide block is used for reducing conductor vibration, ensuring the straightness of the machined hole and further reducing the deflection of the machined hole.

In fig. 1, one end of a cutter body 1 is provided with a cutting part 2, the other end of the cutter body is provided with a threaded connection part 6, and a guide part 4 is arranged in the middle; a connecting portion 3 is provided between the cutting portion 2 and the guide portion 4, and a connecting portion 5 is provided between the guide portion 4 and the screw connecting portion 6.

In fig. 2, the cutting part 2 is provided with 4 insert grooves 8 and 4 chip removal parts 9, and the insert grooves 8 and the chip removal parts 9 are distributed around the circumference of the cutter body 1 at intervals; the blade 7 is welded to the blade groove 8.

In fig. 3, the guide portion 4 has 4 guide grooves 11 and 4 cooling grooves 12; the guide grooves 11 and the cooling grooves 12 are distributed around the circumference of the cutter body 1 at intervals; the guide groove 11 is welded with a guide block 10.

When the front positioning pull reamer is used for processing a workpiece, firstly, the cutter bar extends out of a through hole of the workpiece to the left end of the workpiece, the threaded connection part 6 of the cutter is connected with the cutter bar, the workpiece rotates, the cutter moves linearly rightwards, the guide part 4 enters an inner hole of the workpiece, and the processing stability of the cutter in the hole is ensured; the guide block 10 on the guide part 4 is contacted with the inner hole wall of the processed workpiece, and has a front positioning function in the movement of the cutter, so that the vibration can be effectively inhibited, the deflection is prevented, and the straightness is ensured; the cooling groove 12 on the guide part 4 is used for increasing the input of cooling liquid and ensuring smoother chip removal.