Arenaceous belt grinding and design of its machine tool

Keywords:APreface of Grinding1 of 　 of Grinding Machine of 　 of Brasive Belt Grinding is arenaceous taking grinding is a basis workpiece appearance, the arenaceous belt that with corresponding contact means and high speed move has a kind of of grinding and polish new technology to workpiece surface. The progress as industry of car, building materials, adornment, mould industry and other light industry and development, to metal and metalloid material especially difficult treatment material was like the exterior machining quality such as plastic, leather, balata, stainless steel, pottery and porcelain, productivity and work environment to raise taller and taller requirement, with the cutting of common tradition treatment method already satisfied these requirements hard. In the past 5, inside 60 years, arenaceous belt grinding serves as a kind of new technology, in these treatment the domain is producing bigger and bigger effect. Arenaceous belt grinder basically is used as kibble, go grinding of burr, large surplus, essence is ground, fine grind, adornment polish, inadvertently grind and of figuration grinding with. In modern industry, arenaceous belt the treatment characteristic that grinding technology provides alone with its is regarded as to be a kind of very important treatment method. Abroad has an expert ever arenaceous belt grinder comparing is done " prospective giant " will try to comment. 2 arenaceous belts grinding principle implementation is arenaceous the main method that takes grinding treatment has: Arenaceous belt is free the Zhang Jin law, roll that contains osculatory annulus arenaceous belt law and receive standard of edges for doors. The most commonly used is the standard of roll arenaceous band that contains osculatory annulus. If the graph shows 1 times: Graph 1 　 arenaceous belt is covered it is on the outside face of transmission annulus, contact annulus, make arenaceous belt Zhang Jin and high speed motion, according to workpiece appearance and treatment requirement, undertake grinding or polish to workpiece with contacting means and proper grinding parameter accordingly. Arenaceous belt the main part of grinding has: (Gearing of 1) main shaft. Have sheet fast or the gearshift drive that has bigger flexibility, fashionable dress has reversible electromotor, in order to change the athletic way of arenaceous belt. Leather belt speed is 10 ～ 50m/min, take 16 ～ 30m/min normally, advocate the power of gearing, be on the arenaceous area with every wide 10mm 0.

3 ～ 0.

7kW. (2) is arenaceous carry tension station. Maintain grinding to reach the proper tension of arenaceous belt when directing to be in arenaceous belt has main effect in grinding process, it affects surface roughness of the cutting function of arenaceous belt and surface of treatment spare parts. Should raise arenaceous area when pulling force, can raise a metal to excise a quantity, but also raise exterior surface roughness to be worth the wastage with abrasive overburden at the same time. Make clear via the experiment, the tension of arenaceous belt is inside limits of 6 ～ 8N/mm, when going against grinding every time the journey can cut the largest metal amount. Taut orgnaization has multiform, arrive from simple machinery or bedspring method wide arenaceous area and the pneumatic that weigh laden grinding machine tool to use and hydraulic pressure are taut device. In the meantime, to obtain the biggest productivity, must make change the time of arenaceous belt is least, normally handlers can be in arenaceous belt changes in 1min. (3) arenaceous belt is oriented device. When arenaceous belt works, idler or Zhang Jin annulus ought to can adjust, make arenaceous belt locates reach in be opposite, according to the width of arenaceous belt, this one device is OK the hand is moved or automatic. Arenaceous bandwidth is spent when be more than 200mm, use automatic oriented device normally, make osculatory annulus and Zhang Jin annulus the arenaceous belt between is opposite automatically. (4) is contacted annulus. Osculatory annulus is on grinding dot bearing arenaceous belt, its noumenon is to use aluminium or steeliness to become, annulus on the stretch group that covers balata, fiber, felt or other material to make (ply is 3 ～ 15mm) . According to need, can make all sorts of density oak rubber tyre, annulus the surface makes crisscross open groovy type or smooth style. Use what all sorts of balata compound serve as osculatory annulus to cover a range, want in order to satisfy certain grinding. These compound include: Synthetic rubber of polyethylene of balata of ketone of chloroprene rubber, vinyl, silicon, chloric sulphation. (If 5) installs a template at the back of arenaceous belt (steel, hard alloy or cast-iron flat) will replace osculatory annulus, achievable grind edge, quadrangular, end panel, plane and grinding work of essence of life to make, assure the flatness of the spare parts or linearity. In addition still aspiration system waits. 3 arenaceous belts if the tool of grinding characteristic arenaceous belt and easy attaint is used at the tool photograph such as grinding of odd blade turning, milling, emery wheel to compare, have following characteristic: (1) treatment efficiency is tall. Those who pass concentration is acicular arenaceous bead is used advanced " electrostatic plant arenaceous law " , make arenaceous bead even and erect at mouth of base, Ju Feng up, directional and orderly arrange, it is good to wait for tall sex, the gap that hold bit is big, interface is small, have better cutting performance. The cutting tool that uses much blade of this more than 1 knives undertakes grinding is machined, already amounted to every Mm to the excision rate of rolled steel wide arenaceous area 200 ～ 600mm3/min. (Quality of 2) treatment surface is high. Arenaceous belt small attrition of the interface when grinding is calorific little, and grind bead to come loose hot time-interval is long, reduce workpiece effectively to be out of shape reach burn, cause treatment precision is tall, dimension precision can amount to ± 0.

002mm; Flatness can be amounted to 0.

001mm. Additional, arenaceous belt is flexible when grinding contact, have better land grinding, abrade wait for multiple action with polishing, plus grinding system vibration small, grinding rate stability makes surface roughness of exterior treatment quality is worth small, leftover stress position is good, the surface roughness of workpiece can amount to Ra0.

4 ～ 0.

1 μ M, and the surface has even surface roughness. But as a result of arenaceous belt cannot nap, reason arenaceous tape grinding treatment precision compares emery wheel grinding slightly low. (3) craft flexibility is big, adaptability is strong. Arenaceous belt grinding can be used at plane conveniently, outside circle, inside the rough machining grinding under 20mm of surplus of round grinding, sophisticated abnormity face treatment, cutting, go surface of burr and the prior operation that are film spare parts, polish, eliminate board base appearance blemish, blade is ground and. Besides having all sorts of general, special facility, design an arenaceous belt wheelhead can be installed conveniently go up at the groovy and off-the-peg equipment such as lathe, planer and milling machine, can make these machine tool functions expand greatly not only, and be like,can solve part of a few difficult treatment train in excess specified length, exceed large shaft kind, the nicety that wait machines planar spare parts, irregular surface. (4) is arenaceous contain very big flexibility, consequently whole system has taller fight brace up quality. (5) is arenaceous take measure but very big, apply to large area efficient treatment, and equipment is simple, safety in operation, use safeguard convenient, change arenaceous belt and groom time of expenses of personnel of machine tool operation is less. (Arenaceous in machining a process belt grows 6) , appearance and high accuracy of dimension short of, the acerb and prominent place on treatment spare parts and grind difficulty with essence of fine granuality abrasive, the consistence of arenaceous belt is lower, arenaceous below most circumstance belt is impossible at the same time to amend, term of service is so short. 4 arenaceous belts grinder design asks according to some factory, used arenaceous tape to the retort wall of this factory grinding treatment, the purpose is purify the exterior blemish such as skin of oxidation of wall of this spare parts, in order to be helpful for wall enamel. Size of this spare parts is larger, use treatment of emery wheel grinding so, the noise in treatment is very big, cut bits to fly upwards everywhere, working environment extreme difference. Design of this machine tool basically has below 3 parts content (2) seeing a picture: Graph 2 　 　 (1) drive designs drive of this machine tool the design is opposite simpler, basically comprise by 3: Of ① arenaceous belt advocate motion. Drive arenaceous belt directly by electromotor the orgnaization moves, because retort diameter is big. Axial is longer, because the axis of this electromotor front is cantilever type, soldering baseplate structure tigidity is close friends, want to notice solder guides the internal stress that have especially. The feed of ② arenaceous belt moves. The car orgnaization that motion passes the feed of arenaceous belt to be comprised by orgnaization of guide screw nut is driven whole arenaceous belt axial of orgnaization edge retort moves. Make to be when treatment end arenaceous belt orgnaization with be being returned quickly, accordingly this machine tool sets fast electric machinery, join through surmounting clutch between fast electric machinery and feed electric machinery. The feed of ③ workpiece moves. Because work is greater, establish electromotor to pass leather belt annulus and gear to fall alone so fast drive retort roll. (① of 　 of design of 2) main orgnaization is arenaceous carry tension station. This orgnaization basically is the relative position that will adjust osculatory annulus and workpiece through guide screw and bedspring, and the tension that makes Zhang Jin annulus keeps certain. ② contacts round of design. Because size of this spare parts is larger, and be use as rough machining, reason chooses harder balata to contact annulus, osculatory annulus diameter is 250mm, osculatory annulus surface uses wider groove grain and narrower working face, in order to increase intensity of pressure, raise cutting efficiency and arenaceous area life, according to characteristic of this spare parts, groove grain span is taken for 10mm. (Parameter of 3) main technique chooses arenaceous belt speed to spend 20 ～ 30m/s, arenaceous belt length spends 2500 ～ 3150mm, width 200mm, power of arenaceous electrified motive 7.

5kW. 5 last words are arenaceous take grinding to serve as a new technology, already had in the world of all kinds application of product of arenaceous band plane, home still uses level at promotion, its advantage already was known by people place stage by stage. If this one new technology gets be popularizinged further applied, be sure to produce bigger effect to the manufacturing industry of our country, also can be opposite at the same time at present stagnant each medium and small businesses reduces cost, raise efficiency to reach raise a product to machine precision to have main effect. CNC Milling