CN1252331A - Machining process of high-accuracy and great-depth small hole - Google Patents

Abstract

The present invention is that preprocessing is carried out on machined material matrix, preset holes are first processed on the position of setting processing Fine and Deep Hole, then it is put into prefabricated cold-drawing stainless steel bars elongated tubular in hole, solder is put around the outer wall of pipe, can be obtained high-precision Fine and Deep Hole after soldering. The present invention solves aperture within the scope of 0.10mm-1.50mm, and the ratio between hole depth and aperture are greater than 15: 1 high-accuracy and great-depth small hole. The roughness of Fine and Deep Hole inner circle is low, reaches 11, maximum aspect ratio is up to 200: 1, and simple process, at low cost, a large amount of high in machining efficiency.

Description

Machining process of high-accuracy and great-depth small hole

What the present invention relates to is a kind of machining process of high-accuracy and great-depth small hole, belongs to the retrofit field of metal material.

Traditional metal material deep hole machining method has: 1, Mechanical Method, and adopt the Mechanical Method of bit drills aperture can only process aperture more than aperture 0.5mm, the degree of depth is generally less than 3mm, and endoporus roughness is larger; 2, laser method, adopts the method for laser boring can obtain the aperture of minor diameter, but also has depth as shallow, the problem that endoporus is coarse; 3, electric spark method, adopting spark erosion technique is to process at present the main method of dark aperture, the aperture of processing can be as small as 0.005mm, but its endoporus is coarse.Limited by rigid electrode, the aspect ratio of this method institute machining small is also restricted.Still lack at present a kind of can be on Steel material machining small and endoporus roughness is little, aspect ratio is large method.Through the retrieval to existing document, not yet finding that there is so far the matrix of steel and other metal materials is in 0.10mm-1.0mm at dark small aperture, and little hole depth and diameter ratio are greater than the new technology of the high-accuracy and great-depth small hole processing of 15: 1.

The object of the invention is to overcome deficiency of the prior art, adopt a kind of new process, on the matrix of stainless steel and other metal materials, implement machining process of high-accuracy and great-depth small hole, to meet the requirement that obtains high-accuracy and great-depth small hole on the matrix of this class material.

Technical scheme of the present invention for carrying out preprocessing on machined material matrix, on the position of setting the dark aperture of processing, first process preset fabrication hole, then in hole, put into prefabricated cold-drawing stainless steel bars elongated tubular, the outer wall of pipe is put scolder around, can obtain high-precision dark aperture after heating in vacuum soldering.Soldering processes condition is: heating in vacuum 10 ^-3pa, 1050 ℃-1150 ℃.

The present invention has significant effect and substantive distinguishing features, solved within the scope of machined for a long time insurmountable aperture within the scope of 0.10mm-1.0mm, the high-accuracy and great-depth small hole that the ratio in hole depth and aperture is greater than 15: 1, the roughness of longhole inner circle is low, reaches 11, and maximum aspect ratio can reach 200: 1, and technique is simple, cost is low, and a large amount of working (machining) efficiencies are high, is specially adapted to the occasion of a large amount of dark apertures of processing on a matrix.The present invention is that basic machine manufacture technique has been filled up a kind of new technology, as a new processing technology, for the development that promotes new and high technology, plays a kind of strong facilitation.

Below with reference to accompanying drawing, further describe

Fig. 1 mouth material preprocessing to be processed mode one schematic diagram

Fig. 2 mouth material preprocessing to be processed mode two schematic diagrames

As shown in Figure 1 and Figure 2, first the present invention carries out preprocessing perforate 2 in material matrix 1 to be processed, perforate 2 can utilize line cutting to bore a fabrication hole 6 near the position of setting the dark aperture of processing, penetrate line of cut, along aperture position, cut, then in machining small 2 positions, put into the stainless elongated tubular 3 of prefabricated cold-drawn, carry out lead welding and shaping after putting scolder on pipe outside and line cutting seam 5.Fabrication hole 6 soldering simultaneously sealing.Soldering processes condition is: heating in vacuum 10 ^-3pa, 1050 ℃-1150 ℃.After soldering, can obtain high-accuracy and great-depth small hole.Also can be by material to be processed along machining small 2 positions to cutting, in aperture 2 positions, open respectively fine groove, then put into cold-drawing stainless steel bars elongated tubular 3 and put scolder in pipe outside, under special fixture 4 is fixing, carry out equally heating in vacuum soldering, and to matrix 1 welding of cutting, obtain high-precision dark aperture.

Claims (2)

1, a kind of machining process of high-accuracy and great-depth small hole, it is characterized in that carrying out preprocessing on machined material matrix 1, on the position of setting the dark aperture of processing, first process preset holes 2, then in hole 2, put into prefabricated cold-drawing stainless steel bars elongated tubular 3, the outer wall of pipe is put scolder around, can obtain high-precision dark aperture after soldering.

2, this machining process of high-accuracy and great-depth small hole according to claim 1, is further characterized in that soldering processes condition is: heating in vacuum 10 ^-3pa, 1050 ℃-1150 ℃.

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