阅读说明：本技术 一种铰滚组合成型刀 (Hinge and roller combined forming cutter ) 是由 史东丽 高建国 周岳 商闯 高文娟 于 2019-09-09 设计创作，主要内容包括：本发明属于钻削工具领域,涉及一种铰滚组合成型刀。一种铰滚组合成型刀,第一部分为直柄直槽铰刀,第三部分为滚压刀,两部分通过轴颈联接,轴颈为第二部分,第四部分为柄部,柄部与机床主轴联接。所述的直柄直槽铰刀呈均匀分布有六个切削刃,切削刃间设有容屑槽,切削锥面与水平面形成的第一切削锥角为45度；切削锥的倒角锥面与水平面形成的第二切削锥角为15度。本发明通过将铰孔和滚压同时加工,加工工序减少,缩短了加工时间,加工效率大大提高；通过将铰滚孔一次加工,减少了加工装夹次数,加工精度大大提高,有效保证产品质量,合格率升高。此发明结构简单,生产及加工工艺简单,降低了工人操作难度,加工成本大大降低。(The invention belongs to the field of drilling tools, and relates to a hinge-roller combined forming cutter. A reamer and roller combined forming cutter is characterized in that a first part is a straight-shank straight-groove reamer, a third part is a rolling cutter, the two parts are connected through a shaft neck, the shaft neck is a second part, a fourth part is a handle part, and the handle part is connected with a machine tool spindle. Six cutting edges are uniformly distributed on the straight-shank straight-flute reamer, chip pockets are arranged among the cutting edges, and a first cutting cone angle formed by a cutting conical surface and a horizontal plane is 45 degrees; the chamfer conical surface of the cutting cone forms a second cutting cone angle of 15 degrees with the horizontal plane. By simultaneously processing reaming and rolling, the processing procedures are reduced, the processing time is shortened, and the processing efficiency is greatly improved; through once processing the hinge roll hole, reduced processing clamping number of times, the machining precision improves greatly, effectively guarantees product quality, and the qualification rate risees. The invention has simple structure and simple production and processing technology, reduces the operation difficulty of workers and greatly reduces the processing cost.)

1. A reaming and rolling combined forming cutter is characterized by comprising four parts, wherein the first part is a straight-shank straight-groove reamer, the third part is a rolling cutter, the two parts are connected through a shaft neck (3), the shaft neck (3) is the second part, the fourth part is a handle part, and the handle part is connected with a machine tool spindle;

Six cutting edges (1) are uniformly distributed on the straight-shank straight-flute reamer, chip flutes (2) are arranged among the cutting edges (1), and a first cutting cone angle (10) formed by a cutting cone surface (lead-in cone) and a horizontal plane is 45 degrees; a second cutting cone angle (9) formed by the chamfer conical surface of the cutting cone and the horizontal plane is 15 degrees;

Length l of the cutting cone of the second cutting cone angle (9)₁A length l of the cutting cone of the first cutting cone angle (10) of 2mm₂＝l₁The width of the blade land is 1.25l₁；

6 air outlet holes (4) are uniformly distributed on the shaft neck (3) along the circumferential direction, the tail part of the chip pocket (2) adopts circular arc transition, the top end of the tail part of the chip pocket is correspondingly provided with the air outlet holes (4), the included angle (11) between the air outlet holes and the air holes is 35-45 degrees, and metal chips are discharged along the chip pocket (2) through air pressure in the reaming process, so that the rolling of the holes is facilitated;

The third part of the hob is uniformly distributed with 6 rollers (5) along the circumference, and the diameter of each roller (5) is 2l₁Length of 6l₁Embedded in the roller groove (6); air holes (8) along the central line of the shaft are formed in the second part, the third part and the fourth part, the mandrel (7) is arranged in the air holes (8), and the rollers (5) are supported through the matching of the mandrel (7) and the air holes (8).

2. The reaming and rolling composite forming cutter as claimed in claim 1, wherein the material of the roller (5) is GCr15 or high-speed steel W18Cr 4V.

3. A reaming and rolling combined profile knife according to claim 1, characterised in that the angle (11) is designed to be 45 degrees.

4. a reaming and rolling combined profile knife according to claim 2, characterised in that the angle (11) is designed to be 45 degrees.

Technical Field

The invention belongs to the field of drilling tools, and relates to a hinge-roller combined forming cutter.

Background

For the precise deep hole processing with the aperture smaller than 30mm, at present, a traditional processing technology of drilling, rough reaming, fine reaming and honing is often adopted, a plurality of cutters are adopted in a plurality of processes, the mode needs to be changed, the processing time is long, the efficiency is low, and the processing cost is high. Therefore, the hinge and roller combined forming cutter is designed to solve the problems.

disclosure of Invention

The invention aims to solve the technical problems that when precise small-diameter deep hole machining is carried out, the production efficiency of the traditional machining process is low, the machining cost is high, the reaming and rolling holes are machined simultaneously, the machining time is saved, the equipment utilization rate is improved, and the product quality is effectively ensured by one-time machining.

In order to solve the technical problems, the technical scheme of the invention is as follows:

A reamer-roller combined forming cutter comprises four parts, wherein the first part is a straight-shank straight-groove reamer, the third part is a rolling cutter, the two parts are connected through a shaft neck, the shaft neck is the second part, the fourth part is a handle part, and the handle part is connected with a machine tool spindle.

Six cutting edges are uniformly distributed on the straight-shank straight-flute reamer, chip pockets are arranged among the cutting edges, and a first cutting cone angle formed by a cutting conical surface and a horizontal plane is 45 degrees; a second cutting cone angle formed by the chamfer conical surface of the cutting cone and the horizontal plane is 15 degrees;

Length l of the cutting cone of the second cutting cone angle₁Length l of the cutting cone of the first cutting cone angle of 2mm₂＝l₁The width of the blade land is 1.25l₁. The first cutting cone angle serves as a guide and the second cutting cone angle serves as a cutting.

The shaft neck is uniformly provided with 6 air outlet holes along the circumferential direction, the tail part of the chip groove is in a circular arc transition shape, the top end of the tail part of the chip groove is correspondingly provided with the air outlet holes, the included angle between each air outlet hole and each air hole is 35-45 degrees, and metal chips are discharged along the chip groove through air pressure in the reaming process, so that the hole is convenient to roll.

Furthermore, the included angle is designed to be 45 degrees, and the metal scrap blowing effect is better.

The third part of the hob is evenly distributed with 6 rollers along the circumference, and the diameter of the rollers is 2l₁Length of 6l₁and is embedded into the roller groove. The second part, the third part and the fourth part are internally provided with air holes along the central line of the shaft, the mandrel is arranged in the air holes, and the rollers are supported by matching the mandrel with the air holes.

further, the roller material is GCr15 or high-speed steel W18Cr 4V.

The invention has the following beneficial effects:

By simultaneously processing reaming and rolling, the processing procedures are reduced, the processing time is shortened, and the processing efficiency is greatly improved; by machining the hinge roll hole at one time, the machining clamping times are reduced, the machining precision is greatly improved, the product quality is effectively guaranteed, the rejection rate is reduced, and the qualification rate is increased. The invention has simple structure and simple production and processing technology, reduces the operation difficulty of workers and greatly reduces the processing cost.

Drawings

FIG. 1 is a schematic view of the structure of the inventive cutter.

Figure 2 is a cross-sectional view of the inventive tool.

Fig. 3 is a bottom view of the inventive knife.

In the figure: 1, cutting edge; 2 chip flutes; 3, a shaft neck; 4, air outlet holes; 5, a roller; 6, roller grooves; 7, a mandrel; 8 air holes; 9 a second cutting cone angle; 10 a first cutting taper angle; 11 the air outlet and the air hole form an included angle.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

the invention adopts the technical scheme that the reaming and rolling combined forming cutter is characterized in that the whole material of the cutter is hard alloy, the material of a roller is GCr15 or high-speed steel W18Cr4V, and a reamer with the diameter of 20mm and the precision of H7 is taken as an example.

The reamer mainly comprises 4 parts, as shown in figure 2, the first part is a straight-shank straight-flute reamer, the third part is a rolling cutter, the two parts are connected through a shaft neck 3, the shaft neck 3 is the second part, the fourth part is a handle part, and the handle part is connected with a machine tool spindle.

As shown in fig. 1, the first partial reamer portion has 6 cutting edges, which are evenly distributed, with chip flutes between the cutting edges, and two cutting cone angles, a first cutting cone angle 10 of 45 degrees, a second cutting cone angle 9 of 15 degrees, a 15 degree cutting cone length of 2mm, a 45 degree cutting cone length of 2mm, and a land width of 2.5 mm. The first cutting cone angle 10 plays a guiding role and the second cutting cone angle 9 plays a cutting role.

The second part is a shaft neck 3, as shown in fig. 2, 6 air outlet holes 4 are uniformly distributed on the shaft neck 3 along the circumferential direction, the tail part of the chip pocket 2 is in a circular arc transition shape, the air outlet holes 4 are correspondingly arranged at the top end of the tail part of the shaft neck 3, the included angle 11 between each air outlet hole and each air hole is 35-45 degrees, and metal chips are discharged along the chip pocket 2 through air pressure in the reaming process, so that the hole rolling is facilitated.

The third part hobbing cutter evenly distributed has 6 roller 5 along the circumference, and the roller diameter is 4mm, and length is 12mm, imbeds in the roller groove 6. The second part, the third part and the fourth part are internally provided with air holes 8 along the central line of the shaft, the mandrel 7 is arranged in the air holes 8, and the roller 5 is supported by the matching of the mandrel 7 and the air holes 8.