CN102357788B - Machining method for solid carbide reamer - Google Patents

Abstract

The invention relates to a machining method for a solid carbide reamer. The machining method is characterized by comprising the following steps of: 1) machining a carbon steel false center; 2) welding the false center; 3) turning the false center; 4) machining a reamer; and 5) taking the false center out and removing the false center. By the method, the coaxiality and dimensional tolerance of a high-accuracy cutter product can be effectively ensured, unnecessary raw material and equipment loss and grinding machining working hours can be reduced, and simultaneously, a tooth profile and a clearance angle can be aligned and ground in machining to prevent blade breaking conditions in the grinding and reduce waste products.

Description

Machining method for solid carbide reamer

Technical field

The present invention relates to a kind of machining method for solid carbide reamer, be used for the processing solid carbide reamer.

Background technology

During small diameter bore on fine finishining titanium alloy or the high-duty steel part, the inserted alloy reamer of general employing, inserted blade reamer processing technology comparative maturity, manufacture also than being easier to, but there is in use the cracked phenomenon of cutter tooth, part to be processed was scrapped owing to dimension overproof or bad causing of surface luminous intensity.In order to address this problem, we have used solid carbide reamer, and profile of tooth is processed with numerical control knife sharpener, and this cutter has well solved the cracked problem of cutter tooth.The processing method of this cutter is first the hard alloy bar two ends to be worn into 60 ° top, then uses alloy cylindrical grinder processing excircles size.But also produced new problem and shortage simultaneously: the top fineness that 1) grinds is bad, causes the grinding reference precision not high.Bowlder outside grinding, blade and each outer circles of guiding are not smart, and high-precision size also can't be guaranteed.2) spillage of material is larger.Because two ends all will lengthen and make counter center about 5mm during the blanking of this processing method requirement cutter, cut away at last; Simultaneously along with cylindrical increases, 60 ° of counter centers want and anti-nest preparation sharpening, and elongated portion must be along with lengthening, and draw one will be cut away cutter more than the 10mm, cause the huge waste in raw material, equipment loss and grinding man-hour.3) when sharpening machine-cut tooth and relief angle, because benchmark is inaccurate, very easy do not have the land mill, and the situation of disconnected sword occurs, and causes waste product.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of machining method for solid carbide reamer, the method can not only effectively guarantee axiality and the dimensional tolerance of high precision cutting tools product, and can save unnecessary raw material, equipment loss and grinding man-hour, add simultaneously centering grinding profile of tooth and relief angle in man-hour, disconnected sword situation occurs when preventing grinding, reduces waste product.

For overcoming the above problems, concrete technical scheme of the present invention is as follows: a kind of machining method for solid carbide reamer is characterized in that may further comprise the steps:

1) processing carbon steel false center: an end of false center is cylindrical, the diameter of cylinder is greater than the outside diameter of carbide-tipped reamer to be processed, the other end turning of false center goes out groove, and groove is trapezoidal truncated conical shape, and the top end diameter of trapezoidal round platform is the disk of Ф 1;

2) welding false center: the face of cylinder of the false center that processes is downward, and carbide alloy bar bottom surface overlaps also coaxial with the disk of Ф 1, with spelter solder carbide alloy bar and false center are welded and fixed;

3) turning false center: with lathe false center is carried out turning to the size less than finished product reamer outside diameter, and make centre bore at end face, and by pincers worker grinding center hole, with the quality of controlled working benchmark;

4) processing reamer: the carbide alloy bar is processed, reached the specification requirement of cutter;

5) take out false center: after reamer machines, remove false center and get final product.

This machining method for solid carbide reamer has effectively changed the in the past bad difficult problem of high accuracy Integral alloy cutter size Control, can also save the expenses such as raw material, stops grinding and produces waste product, and its security has also obtained checking.

Description of drawings

Fig. 1 is the sketch of accepting of solid carbide reamer.

Fig. 2 is the false center schematic diagram.

Fig. 3 is the welding schematic diagram of false center and carbide alloy bar.

Fig. 4 is false center turning schematic diagram.

Wherein 1 is false center; 2 are brazing; 3 is the carbide alloy bar.

The specific embodiment

As shown in Figure 1, rapidoprint is that Y300 whole hard alloy bar carries out solid carbide reamer, and the axiality of this reamer and blade precision are 0.004mm all, and processing method may further comprise the steps:

1) as shown in Figure 2, processing carbon steel false center: an end of false center is cylindrical, and the diameter of cylinder is greater than the outside diameter of carbide-tipped reamer to be processed, and the other end turning of false center goes out groove, groove is trapezoidal truncated conical shape, and the top end diameter of trapezoidal round platform is the disk of Ф 1;

2) as shown in Figure 3, welding false center: the face of cylinder of the false center that processes is downward, and carbide alloy bar bottom surface overlaps also coaxial with the disk of Ф 1, with spelter solder carbide alloy bar and false center are welded and fixed;

3) as shown in Figure 4, the turning false center: with lathe false center is carried out turning to the size less than finished product reamer outside diameter, and make centre bore at end face, and by pincers worker grinding center hole, with the quality of controlled working benchmark;

4) processing reamer: the carbide alloy bar is processed, reached the specification requirement of cutter;

5) take out false center: after reamer machines, remove false center and get final product.

Advantage of the present invention is:

1) the again change by the benchmark mode, the problem that makes the required precision of puzzlement Integral alloy cutter be difficult to realize is solved.

2) expenses such as raw material, equipment loss and machining period have greatly been saved.

Disconnected sword no longer occurs when 3) grinding profile of tooth and relief angle, has reduced percent defective.

The method can be widely used in the processing of the solid carbides such as high precision reamer, reamer, milling cutter.

Claims (1)

1. machining method for solid carbide reamer is characterized in that may further comprise the steps:

1) processing carbon steel false center: an end of false center is cylindrical, the diameter of cylinder is greater than the outside diameter of carbide-tipped reamer to be processed, the other end turning of false center goes out groove, and groove is trapezoidal truncated conical shape, and the top end diameter of trapezoidal round platform is the disk of Ф 1;

2) welding false center: the face of cylinder of the false center that processes is downward, and carbide alloy bar bottom surface overlaps also coaxial with the disk of Ф 1, with spelter solder carbide alloy bar and false center are welded and fixed;

3) turning false center: with lathe false center is carried out turning to the size less than finished product reamer outside diameter, and make centre bore at end face, and by pincers worker grinding center hole, with the quality of controlled working benchmark;

4) processing reamer: the carbide alloy bar is processed, reached the specification requirement of cutter;

5) take out false center: after reamer machines, remove false center and get final product.

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