The design of boring cutter of fine tuning of whorl differential type and make

8 ～ 1.

6µm, common type has type of boring cutter of boring cutter of whorl type fine tuning, prejudicial type fine tuning, chute double blade boring cutter and float boring cutter. These fine tuning boring cutter provide a characteristic each, get applied extensively in actual production, among them conception of boring cutter of fine tuning of whorl differential type is original, fine tuning precision is tall, can eliminate whorl gap automatically, it is a kind of fine tuning boring tool that has development outlook. The design that article key introduces this cutting tool and production point. 1.

Knife head body 2.

Boring cutter lever 3.

Whorl directs inside set 4.

Radial decides bolt closely 5.

Bedspring 6.

Adjust set 7.

Axial decides bolt closely 8.

Bolt of connection of knife head body 9.

Decide oriented bolt closely 10.

Impaction bolt pursues structure of boring cutter of fine tuning of type of 1 whorl differential pursues the clearance of 5 eliminates 2 bedspring principle the design of boring cutter of fine tuning of type of 1 whorl differential and boring cutter of production fine tuning by knife head body 1, inside whorl is oriented set 3, adjust set 6 wait for composition, installation is in boring cutter lever 2 on, adjust among them set 6 with inside whorl directs whorl is a connection of 3 M27 × 1.

5-7H, and whorl of join of knife head body 8 with adjust cover the connection whorl of 6 to be M12 × 1.

25-6H(left) . To prevent inside whorl directs a roll of 3 and shift, use a radial to decide bolt closely respectively 4 decide bolt closely with an axial 7. Move to ensure the axial of knife head body is oriented and secure do not move, used two to decide bolt closely 9, 10. To eliminate × of connection whorl M27 1.

The clearance of 5-6H, used compress bedspring 5. Bedspring the action of 5 is to make adjust set 6 move right, adjust when fine tuning set of 6 outside whorl M27 × 1.

The right side of 5 and inside whorl directs a M27 × 1.

The left side posture of 5 is contacted, the extruding force way that the effect way of this bedspring force and cutting tool produce in cutting is consistent, when so boring cutter works, won't become loose, this force decides bolt closely through radial and axial 4, 7, pass to boring cutter lever directly 2 on (2) seeing a picture. Cover in exchange part 6 when undertaking fine tuning, as a result of this connection outside whorl M27 × 1.

5 it is dextral whorl, reason arranges hour hand when its when rotational a week, will make towards the left of knife head body (before) mobile 1.

5mm; Because adjust,cover meanwhile with × of M12 of whorl of connective of knife head body 1.

25 it is left whorl, when its arrange a week of hour hand roll, grain of this Zun Luo will make again knife head body right (hind) mobile 1.

25mm, right now so the real shift of knife head body is L=1.

5-1.

25=0.

25(mm) namely boring cutter is actual an extension forward 0.

25mm. Because adjust,cover there is scale of divide into equal parts on 6 right end panel 50 case, so section of modulate coming back covers 6 every fine tuning the feed quantity of the boring cutter when one case is 0.

25 ÷ 50=0.

005(mm/ case) =5µm/ case the body of head of knife of the point that make of boring cutter of fine tuning of type of 2 whorl differential whorl of 1 connection of body of the head that reach a knife 8 choose 35CrMoA material, the intensity of this kind of material and tenacity are taller (hardness is 30-38HRC) , material quenchs be out of shape small, intensity of the creep below high temperature is high, can work for a long time below 600 ℃ temperature. Adjust cover 6 appropriate to choose 40Cr material, this material contains carbolic moderate, integrated and mechanical performance is good, it is good that temper by dipping in water appears a gender, heat is out of shape small, heat treatment attune pledges hardness is 260-290HBS. Whorl directs inside set 3 choose 20Cr material, it is inside its whorl M27 × 1.

5 surfaces and inside aperture F20 surface uses cementite or nitriding, make hardness of the surface inside its amounts to 55-58HRC; Round face does not make cementite or nitriding processing outside, its hardness is 22-25HRC, with boring cutter lever the hardness close of 2. Whorl directs inside surface of the cylinder outside covering two of 3, choose F26 H7/k6 respectively, f34 H9/d9; F26 H7/k6 is assemble fiducial aperture, two outside columnar surface and inside the different axis of aperture spends allow to differ for 0.

01mm less than, will arise otherwise assemble stress. Whorl directs inside set of 3 inside of aperture and knife head body outside it is better that the circle cooperates to choose F20H8/g7, in order to ensure knife head body produces vibration not easily when cutting. Adjust set 6 with × of M12 of whorl of connection of knife head body 1.

25-6H(left) , whorl of its inside and outside should press DH, dh precision is machined, right now of whorl of inside and outside cooperate clearance to be Xmin=EI-es=0, can raise its to adjust precision, reduce whorl gap. Bedspring 5 choose 60SiMn, hardness is 45-50HRC, the norms of bedspring is 1.

6 × 24&time;12, n=3 circle, beforehand pressure is about 50 - 60N. Next two columnar surfaces that decide oriented bolt closely had better use 20Cr, undertake cementite is handled, of the size that its decide oriented and columnar part closely and width of keyway of knife head body cooperate to use, cementite surface is 50-55HRC. The installation of boring cutter of 3 fine tuning and adjust installation Shi Yingxian will inside whorl is oriented set 3 circumferential lever of boring cutter of on two prefab Kong Duizheng 2 go up two decide oriented bolt aperture closely, load boring cutter lever the Kong Zhong of 2, twist again decide oriented bolt closely, make inside whorl directs a 3 basic fixed position, be in next boring cutter lever is corresponding locally, with inside whorl is oriented set 3 deserve to get, tap and mount radial and axial decide bolt closely, make inside whorl is oriented set 3 completely fixed. Pigheaded give two to decide oriented bolt closely, load bedspring 5 and adjust set 6, make bedspring is compressed make an appointment with 10mm, basically obtain a provision beforehand pressure; Fixed adjustment set 6 make its not rotational, body of the pigheaded head that enter a knife and whorl of connection of knife head body the combination of 8, make M12 × 1.

25 whorl enter deepness to make an appointment with) buckle whorl, again right the keyway on knife head body and the position that decide oriented bolt aperture closely twist two to decide oriented bolt closely 9, 10, make knife head body 1 not rotational, boring cutter is assembled entirely namely end. When adjusting, must use pair of knife plate or dial gauge to reach preliminary adjustments of boring cutter point of a knife first theoretical size (± 0.

1mm limits) inside, loosen two are tightened a little decide oriented bolt, again rotational double whorl adjusts set 6 undertake fine tuning. After fine tuning is fine, decide two closely oriented bolt to screw again, boring cutter can work. Carry out a proof via production, precision of fine tuning of boring cutter of fine tuning of pitch differential type is tall, the operation goes to the lavatory simply, working stability is good, when treatment not easy vibration, can eliminate M27 × automatically 1.

The clearance of 5 whorl; In the meantime, the knife head body of boring cutter of this fine tuning is used but dislocation razor blade, tear open easily outfit change, the accurate Kong Jia that can be used extensively on coordinate boring machine and numerical control machine tool is versed in. Adjusting range of boring cutter of this fine tuning is small, to get used to the treatment of large hole, can adopt system of change knife head the different length of 1 in order to enlarge adjusting range. CNC Milling CNC Machining