The differentiate of quality of aperture of bore with a reamer reachs his to solve measure

6 ～ 0.

4. In be machined actually, problem of common quality of aperture of bore with a reamer has exterior surface roughness and dimension precision difference, orifice shows horn shape to wait. Analyse its now generation reason and improve a method. The reason with 1 surface poor surface roughness and its countermeasure bore with a reamer cut speed to cross big bore with a reamer to cut dosage each element is right the exterior surface roughness of aperture of bore with a reamer all influential, cut rate with bore with a reamer among them the impact is the biggest, if use opening of bore with a reamer of high-speed steel reamer, want to obtain better surface roughness Ra0.

63µ ; M, to workpiece of medium carbon steel, bore with a reamer cuts speed to should not exceed 5m/min, because produce the tumor that accumulate bits not easily right now, and rate is not high also; And bore with a reamer is cut cast-iron when, it is because of cutting bits to break graininess, won't form the tumour that accumulate bits, incident rate can rise 8 ～ 10m/min. If use hard alloy reamer, bore with a reamer cuts speed to be able to raise 90 ～ 130m/min, dan Yingxiu makes the certain point of view of reamer, make knife appearance with avoiding to appear. Bore with a reamer cuts surplus impropriety, feed crosses big general bore with a reamer to cut surplus for 0.

1 ～ 0.

25mm, to the aperture of bigger diameter, surplus cannot is more than 0.

3mm, otherwise exterior surface roughness is very poor. Thick bore with a reamer and departure of bore with a reamer of essence of life can be taken when cause surplus is too large, in order to make sure the technology asks. Surplus is too small, cannot normal cutting also can make exterior surface roughness poor. The value of surface roughness Ra of aperture of bore with a reamer follows the addition of feed and increase, but feed spends a hour, meet those who cause radial attrition strength increase, cause reamer to vibrate, make the surface of aperture roughs. So, if use reamer of standard high-speed steel to process steel, want to get Ra0 of exterior surface roughness.

63µ ; M, criterion feed cannot exceed 0.

5mm/r, to cast-iron, can increase to 0.

85mm/r. Reamer the crucial point is not sharp, first flank is coarse and general standard reamer all without abrade, affect the exterior surface roughness of aperture of bore with a reamer, because this must is opposite,new reamer undertakes abrade. Abrade when the boundary that wants the cutting part that notices reamer and calibration part, because inside aperture is here finally figuration, the surface roughness of cutting tool also is mirrorred to the wall of aperture of bore with a reamer in the place. So when abrade reamer, should special attention uses oilstone general the place gently careful and abrade, polish, make of cutting part and calibration part hand over glide is in a circle to cross. Via abrade reamer, surface roughness of first flank of face of the knife after cutting blade gets ameliorative, the surface roughness of cutting part and calibration part boundary also gets ameliorative, it is the surface roughness that improved reamer itself actually, reason is helpful for improving the exterior surface roughness of aperture of bore with a reamer. Lubricating fluid was not used when lubricating fluid was not used when aperture of bore with a reamer or using opening of undeserved lubricating fluid bore with a reamer, criterion of reamer job section hind knife face and hole wall can produce dry clash, make the exterior surface roughness of aperture poor. Same, the lubricating fluid of use impropriety, not only cannot improve attrition condition, can make chafe instead aggravate, affect exterior surface roughness. When cutting carbon steel with bore with a reamer of high-speed steel reamer, can use 10% ～ the emulsion of 15% or sulfurized oil, can get better exterior surface roughness. Bore with a reamer is cut cast-iron when, general need not lubricating fluid. Reamer inverts the meeting when exiting makes exterior surface roughness becomes poor reamer inverts when exiting, because of cutting extruding reamer, and cut hole wall, after reason bore with a reamer is over, should pull reamer from direction of feed of the edge inside aperture outside aperture, be more than the reamer of workpiece part to petiole diameter, should maintain with cutting when identical change direction exit. The origin of aperture of 2 horns shape and settle written complaint of horn of Kongwei of measure bore with a reamer main reason is: The cutting part of reamer and bottom outlet are not homocentric, feed direction and workpiece rotate the center is abhorrent etc. Solve measure to be as follows: The oriented performance that improves reamer can use nicety to direct set, make reamer is cut along bore with a reamer of a narrow passage providing the only means of access to a certain place, if the condition does not allow to use,direct set, can use float collet to install clip reamer, also can reduce the horn form of aperture so. Shorten reamer standard length will improve horn form its method has 2 kinds: The standard length of ① reamer takes 4 ～ 12mm, others diameter is ground small 0.

2 ～ 0.

7mm; ② takes the standard part of reamer to be 4 ～ 12mm, others is ground piece bigger oppose drill, these 2 kinds of methods all can shorten standard length, it is better to be helpful for reamer the job, a kind of method directs the gender is reduced somewhat after, the 1st kind of method is used in real work middling. 3 prevent bore diameter to expand begin aperture of bore with a reamer, aperture bigger the aperture that begins aperture of bore with a reamer is bigger. Because equipment, reamer is certain,its reason is general blemish and bore with a reamer cut dosage to choose misgivings, ought to check mutual place so correct, whether homocentric, main shaft or collet have reamer and workpiece to beat without radial wait for an element. If these do not have a problem, the cutting dosage that considers an option is right. Generally speaking, the accretion of bore diameter is to follow cutting to speed, feed and bore with a reamer cut the accretion of surplus and increase, choose proper lubricating fluid to be able to improve the dilate of bore diameter. Anyhow, must concrete analysis research, find out a reason, ability is solved. The aperture when beginning aperture of bore with a reamer is accurate, bore diameter increases this kind of aperture to enlarge a reason later is the tumour that accumulate bits is formed on tooth, or first flank sticks bits and cause. Divide to high-speed steel reamer outside quenching, still need case hardening processing, when bore with a reamer is cut, use extremely press the measure such as lube. All can improve condition sticking bits. Additional, choose cutting career correctly, also can decrease stick bits, general work data is weaker, bore with a reamer cuts speed to should be jumped over small. In addition, to improve quality of aperture of bore with a reamer, the knife mark on purify hole wall, reamer should be designed not equidistant tooth. Curtly of 4 epilogue above talked to concern the quality issue of aperture of bore with a reamer, but in whole treatment process, influencing factor is very much, reason is in concrete analysis answers to specific issue in actual production, find out a reason from which, make countermeasure, in order to improve quality of aperture of bore with a reamer. CNC Milling CNC Machining