CN220407201U - Drilling reamer - Google Patents

Abstract

The utility model discloses a drilling reamer, which comprises a cutter handle and a cutter body, wherein the cutter handle and the cutter body are cylindrical integrated parts, a drilling part is arranged at the end part of the cutter body, a reaming part is arranged at the rear side of the drilling part, two drilling edges are arranged at the drilling part, the vertex angle of each of the two drilling edges is 140 degrees, four reaming edges are arranged at the reaming part, the reaming edges are obliquely arranged on the cutter body at a spiral angle alpha, chip grooves are arranged between the adjacent reaming edges, the chip grooves are spirally arranged, the drilling radius of each drilling edge is 0. 0.2mm-0.3mm smaller than the reaming radius of each reaming edge, the positions of the drilling edges correspond to the positions of the two opposite reaming edges, and the rear ends of the drilling edges are connected with the front ends of the reaming edges through the oblique edge parts. The drilling reamer can finish drilling and reaming at one time, and improves the processing efficiency of workpieces; the reamer is arranged at a certain spiral angle, and compared with the existing straight flute reamer, the reamer has the advantages that the discharge of cutting scraps is smoother, and the machining precision of holes can be improved.

Description

Drilling reamer

Technical Field

The utility model relates to the field of cutters, in particular to a drilling reamer.

Background

Under the working condition of machining hole parts, particularly when parts with high requirements on hole precision are machined, the traditional machining process is to drill holes by using a drill bit, leave about 0.2mm of allowance, then ream holes by using a reamer, and two cutters are needed, so that the requirements of customers cannot be met. In the prior art, some schemes of drilling and reaming tools are disclosed in, for example, patent publication number CN102837044a, wherein a working part comprises a twist drill part arranged at the front end of the working part and a reaming part connected to the rear of the twist drill, and the twist drill is connected with the reaming part through a shoulder; the top angle of the twist drill is set to be 140 degrees; the main deflection angle of the reaming part is 3-4 degrees, and the number of teeth of the reamer is 4. The technical scheme has the defects that the drilling part adopts the twist drill, the length is longer, the reaming part is a straight flute reamer, and the drilling reamer can be processed and molded once, but is only suitable for easily processed parts such as cast iron materials, aluminum materials and the like, and the drilling reamer is not suitable for parts made of steel materials, stainless steel materials and some difficult-to-process materials because of poor chip removal.

Disclosure of Invention

The utility model aims to provide a drill reamer, which aims at solving the problems that the reaming part of the conventional drill reamer in the background art is a straight flute reamer and is not good for chip removal, so that the conventional drill reamer is not suitable for parts made of steel materials, stainless steel materials and some difficult-to-process materials.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a drill reamer, includes handle of a knife and cutter body, is cylindrical integrated into one piece including handle of a knife and cutter body, is equipped with drilling portion at the tip of cutter body, is equipped with reaming portion at the rear side of drilling portion, and drilling portion is equipped with twice drilling sword, and the apex angle of twice drilling sword is 140, and reaming portion is equipped with four reaming sword, and the reaming sword is equipped with the chip groove with spiral angle alpha on the cutter body slope setting between the adjacent reaming sword, chip groove spiral setting, the drilling radius of drilling sword is less than the reaming radius of reaming sword 0.2mm ~ 0.3mm, the position of drilling sword corresponds with the position of two opposite reaming sword, and the rear end of drilling sword passes through bevel connection with the front end of reaming sword.

In the scheme, the inclination angle between the reaming edge and the axial direction of the cutter body is 10-20 degrees. By the arrangement, the reaming edge is arranged at the helix angle of 10-20 degrees, compared with a straight flute reamer, during reaming, cutting scraps can be smoothly discharged along a spiral chip removal groove, the machining precision of a hole is improved, the machining precision can reach IT7 grade, and the smoothness of the inner wall of the machined hole is improved.

In the scheme, the bevel angle of the bevel edge part is 40-50 degrees. Through the arrangement, the transition between the drilling part and the reaming part is smoother, the feed resistance of the reamer is smaller, and the machining precision is improved.

In the scheme, the cutter handle and the cutter body are both hard alloy pieces. The cemented carbide material may be selected according to the material being processed, for example, a K10 grade cemented carbide material may be selected.

The utility model has the positive effects that: 1) The drilling reamer can finish drilling and reaming at one time, and can improve the processing efficiency of workpieces; 2) Compared with the existing straight flute reamer, the reamer is more smooth in discharging cutting scraps, and can improve the machining precision of holes; 3) The drilling reamer disclosed by the utility model has a wider application range, can be used for parts made of cast iron and aluminum materials, and can be suitable for processing steel parts, stainless steel materials and parts made of difficult-to-process materials; 4) According to the reamer, after drilling is completed by the drilling blade, the machining allowance of the reaming blade is adopted, so that the machining quantity of the reaming blade can be reduced, the machining resistance of the reaming blade is reduced, and the machining precision of a hole is improved.

Drawings

Fig. 1 is a schematic structural view of the reamer of the present utility model.

Fig. 2 is a cross-sectional view A-A of the drill reamer of the present utility model.

The reference numerals in the figures are: the tool comprises a tool handle 1, a tool body 2, a drilling part 3, a reaming part 4, a drilling blade 5, a reaming blade 6, a chip groove 7 and a bevel blade part 8.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described by means of examples, and it is obvious that the described examples are only some, but not all, examples of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A drill reamer as shown in fig. 1 comprises a shank 1 and a body 2.

The tool handle 1 and the tool body 2 are integrally formed, the tool handle 1 and the tool body 2 are all hard alloy pieces, and hard alloy materials can be selected according to processed materials, for example, K10 brand hard alloy materials can be selected.

The knife handle 1 and the knife body 2 are both cylindrical. The end of the cutter body 2 is a drilling part 3, a reaming part 4 is arranged at the rear side of the drilling part 3, two drilling edges 5 are arranged at the drilling part 3, the top angle of the two drilling edges 5 is 140 degrees, four reaming edges 6 are arranged at the reaming part 4, the reaming edges 6 are obliquely arranged on the cutter body 2 at an angle alpha, the inclination angle alpha between the reaming edges 6 and the axial direction of the cutter body 2 is 10-20 degrees, chip grooves 7 are arranged between the four reaming edges 6 in a spiral mode, compared with a straight-groove reamer, cutting chips can be smoothly discharged along the spiral chip grooves 7 during reaming, the machining precision of holes is improved, the machining precision can reach IT7 level, and the smoothness of the machined inner walls of the holes is improved.

The drilling radius of the drilling edge 5 is 0.2-mm-0.3 mm smaller than the reaming radius of the reaming edge 6. After the drilling of the drilling blade 5 is finished, the machining allowance of the reaming blade 6 is processed, the machining amount of the reaming blade 6 can be reduced through the arrangement, the machining resistance of the reaming blade 6 is reduced, and the machining precision of the hole is improved.

Preferably, the positions of the drilling edges 5 of the drilling part 3 correspond to the positions of the two opposite reaming edges 6, and the rear ends of the drilling edges 5 and the front ends of the reaming edges 6 are connected by means of the bevel 8. Through the arrangement, the drilling part 3 and the reaming part 4 can be connected more smoothly, chips generated by cutting of the drilling part 3 can enter the chip removal groove 7 on the reaming part 6 along the chip removal groove 7, so that chip removal is smoother, and the inclined blade part 8 can enable feeding of the reaming part 4 to be smoother, cutting resistance is reduced, and machining precision is improved.

When the reamer is used, the cutter handle is fixedly clamped on the machine tool, the reamer is driven to rotate by the machine tool and feed towards the part of a workpiece needing to be machined, the drilling part is in contact with the workpiece, the drilling part is used for drilling holes, the radius of the drilling hole is 0.2-0.3 mm smaller than that of the designed hole, the rest is required to be machined through the reaming part, the reamer part is continuously fed through the machine tool, the reaming part gradually enters the hole machined by the drilling part to further machine the hole, and the machining resistance is small because the machining quantity of the reaming part is small, and the reaming part is machined through the reaming edge arranged on the spiral angle, so that the chip removal is smooth, the cutting resistance is further reduced, the machining precision is improved, the range of materials which the reamer can be machined is expanded, and the reamer can be used for machining cast iron materials and aluminum materials and parts which are difficult to machine.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. A drill reamer, characterized in that: the cutter comprises a cutter handle and a cutter body, wherein the cutter handle and the cutter body are cylindrical integrated into a whole, a drilling part is arranged at the end part of the cutter body, a reaming part is arranged at the rear side of the drilling part, two drilling edges are arranged at the drilling part, the top angle of each of the two drilling edges is 140 degrees, four reaming edges are arranged at the reaming part, the reaming edges are obliquely arranged on the cutter body at a spiral angle alpha, chip grooves are formed between the adjacent reaming edges, the chip grooves are spirally arranged, the drilling radius of each drilling edge is smaller than the reaming radius of each reaming edge by 0.2-mm-0.3 mm, the positions of the drilling edges correspond to the positions of two opposite reaming edges, and the rear ends of the drilling edges are connected with the front ends of the reaming edges through the inclined edge parts.

2. The drill reamer of claim 1, wherein: the inclination angle between the reaming edge and the axial direction of the cutter body is 10-20 degrees.

3. The drill reamer of claim 1, wherein: the oblique angle of the oblique blade part is 40-50 degrees.

4. The drill reamer of claim 1, wherein: the knife handle and the knife body are both hard alloy pieces.