Raise numerical control machine tool to transform precision method to discuss

  • Time:
  • Click:99
  • source:PERFSO CNC Machining
Summary: ?  of joke of stir-fry before stewing of head of mother of refute of  Tao  guides commonplace ば favour touchs instrument to flinch τ confusing chews  of Tao of  of miscellaneous banter of Cong Jiaobei  feed Xin Shuo of  of Jing of an ancient nationality in China of cerebral Lan grandma treats ∩ of  of hoarse of Gua of ⒃ of  of an ancient drinking vessel unoccupied place accumulate  of Tao of Gou Ling  ! " numerical control of Piao  ? ; Machine tool; Before precision is introductive a few years, a lot of units of our country were introduced from abroad a lot of in machine tool of high-grade numerical control, some enlisting in army expire, some cannot work normally, be in unused, create waste of huge natural resources. The place with these common machine tools consists mechanical share basic and in good condition, precision is taller, because numerical control system appears,basically be problem and purchase fittings hard, the treatment of the need that cannot satisfy normal production and contemporary high accuracy, high rate and high reliability asks. If use number of feed inlet to control a system,undertake counting accusing to change transforming to having numerical control facility, need hundred thousands of yuan of effect that can produce existing equipment only, and the capital that the numerical control machine tool that purchases to be the same as function newly needs millions of very consummate ten million, accordingly, to our country the numerical control of numerical control machine tool is changed transform have obvious economic benefits and social beneficial result, very pressing. The measure that the article is based on this to transform precision to raising numerical control machine tool commonly on the foundation that discussed numerical control machine tool to transform a characteristic undertook more detailed elaborate. The characteristic numerical control that machine tool of 1 numerical control transforms transforms a technology the application in machining industry is wider and wider, is because is numerical control transformed,this basically the following respects highlight characteristic and advantage: ? ?1) investment little, date of delivery is short purchase photograph of new machine tool to compare together, can save the cost of 60%-80% commonly, transform expense low, especially large, special machine tool especially apparent. General and large machine tool is transformed, it is the 1/3 that new machine tool purchases cost only, date of delivery is short. Although have some of special case, if high speed main shaft, tray hands in those who trade unit automatically to make,take a lot of work too with installation, costly, transform this tall also 2-3 times, but with purchase photograph of new machine tool to compare, also can save investment 50% the left and right sides. (The foundation such as the lathe bed that stability of 2) mechanical function uses reliably, pillar it is heavy and of give attention to two or morethings cast component part, is not the sort of soldering component part, the machine tool function after transforming tall, quality is good, can continue to use as new facility old. (When 3) is familiar with maintenance of understanding equipment, facilitating operation to buy new facility, do not understand new facility to whether satisfy its to machine a requirement. Transform criterion otherwise, accurately computation gives machine tool ground process capability, additional, because be used for years, handlers understands the character of the machine tool already, be used in the operation and maintain a respect to groom time is short, get effective fast. Transformed machine tool has been installed, can realize full load movement. (4) can use the development rate that newest control technology can innovate according to the technology, improve level of automation of manufacturing facilities land and efficiency in time, increase equipment and class, will old equipment changes the machine tool of current level. Make full use of existing condition can make full use of existing foundation, when need not resembling purchasing new facility, need to build foundation afresh in that way. Accordingly but managing charge, reduce transform cost, also can shorten at the same time manufacturing preparation is periodic. (The treatment precision that 5) raises product quality and work efficiency to be able to solve complex part is controlled, the product measure consistency of treatment good, percent of pass of tall, percent defective, manufacturing efficiency is tall. Be like machine tool of economy numerical control, can raise work efficiency 3-7 commonly times. To complex part character, difficulty is taller, the work efficiency that improve is more apparent. Still can reduce labor intensity of the worker in addition, raise worker quality to accelerate gain of science and technology gain ground and apply, for " physical strength " to " intelligence " change creates a condition. The machine tools of 2 common method numerical control that raise numerical control machine tool to transform precision should achieve tall static dynamic stiffness on the design, the coefficient of friction between kinematic pair is small, transmission does not have clearance, power is great; Facilitating operation and maintenance. Afore-mentioned requirements should be achieved as far as possible when machine tool numerical control is transformed, still answer main part to undertake proper design asks be transforminged accordingly making its are achieved, ability obtains anticipated transforming purpose, common machine tool transforms a method to be as follows. 2.

The action of slideway of precision of slideway of 1 rehabilitate machine tool is oriented with bear the weight of. Slideway is in carry for nothing and be in below cutting condition when motion, should have enough oriented precision. It is the foundation of precision of machine tool geometry, so, when the machine tool is being transformed, to achieve expectant precision demand, often must repair slideway precision. To different form slideway, repair a method probably following: ? Does?1) use: of precision of slideway of rehabilitate of coating of slideway of annulus oxygen wear-resisting? Lan of backbone of ぷ Xiao ǖ is able to bear or endure bank is contrary to  fade Qian collects vasting backbone Lan to be able to bear or endure subtle.    of creek free time is short of  of Jie of  of Lu of laying delay lofty this ひ blinks  of rotten joke of τ of S of Song of Zhi of saute of crisp garden of  Ju pond feed  of calamity of  of Ч of  of  of fear of  of cerebral Mao  ! : of?2) cast-iron slideway? Mei of ǖ of any of several hot spice plants of Mu of Jian of cochlea of mildew of cowardly of な of commonplace of  of wood of Lan of   backbone falls?8 of lot of predestined relationship of Xing of modular  nest, 25 bits / square centimeter, in the meantime, must assure lubricant dependability. Such ability as far as possible reduce attrition, and the influence that commands precision to the position. 2.

The 2 main component that restoring main shaft of 　 of main shaft precision is main shaft group. When the machine tool works, by main shaft clip is holding work or cutting tool joins exterior figuration campaign directly, to machining quality and productivity, have main effect. So, when transforming must the precision of repair main shaft. Have comprehensive examination to its are being answered after the main shaft of precision out of tolerance disassembles, so that repair plan certainly. But need to change to the clearance of main shaft bearing, readjust bearing is adjusted and be tightened beforehand mostly. Temperature rise test should have after adjusting, temperature rise provides a value more than, should decrease to tighten a quantity beforehand. After main shaft bearing has been assembled afresh, examine with dial gauge and standard club, whether is line of center of taper hole of examination main shaft mixed the coincide of centre of turning circle of main shaft, if differ bigger, must use appropriative wheelhead, taper hole of new grinding main shaft, the centre of turning circle that makes its centre of turning circle is the same as main shaft is complete coincide. 2.

3 rehabilitate or change the development of 　 of ball guide screw as modern science and technology, mechanical manufacturing industry is facing the new challenge such as high rate, high accuracy ceaselessly. Ball guide screw regards machine tool of contemporary numerical control as the main main transfer machinery of feed, grow life, tall stiffness, efficient, tall sensitivity, very close to each other with its unoccupied place wait for marked characteristic and be able to apply extensively, make the part of important form a complete set of machine tool of of all kinds numerical control, and oneself realized standardization, generalization and commercialization. Basically contemporary numerical control machine tool used ball guide screw, but when be being transformed, must restore its drive precision, or flat change new or more the ball guide screw of high accuracy, only such ability assure the fixed position precision after transforming, it is especially in system of half closed circuit, guide screw should have transmission effect not only, have the effect of rear sight even, coder just measures the revolution of guide screw, as to the distance that workbench walks actually, be equivalent to open loop, the precision that can rely on itself of ball guide screw only assures. 2.

4 use accurate instrument to detect 　 of machine tool precision can combine particular machine tool to transform a process, use advanced laser interferometer to survey a system, undertake metrical to the fixed position precision of the machine tool, use ball lever appearance to check machine tool precision quickly, diagnostic source of error, analyse condition of machine tool precision automatically, check fish backlash, verticality, linearity, periodic error, servo does not match, transmission catenary wears away etc, the basis detects result, undertake necessary analysis, the element such as application of recombine capital investment, new technology is transformed necessarily certainly, repair plan. When adjusting machine tool parameter, especially servo drive parameter, but according to ball lever appearance detect result, undertake the system is optimized, make machine tool parameter more reasonable, the system is stabler. Transforming after finishing, use laser interferometer to undertake metrical to fixed position precision, next, have proper compensation according to the circumstance, can raise the fixed position precision of the machine tool and treatment precision greatly. 2.

The gear of common machine tool basically centers the 5 clearance 　 that reduce transmission link in main shaft box and gear-box. To assure transmission precision, the gear accuracy class that uses on numerical control machine tool is higher than general accuracy machine tool. Want to be able to achieve unoccupied place drive of very close to each other on the structure, when be being transformed consequently, main gear must satisfy the machine tool the requirement of numerical control machine tool, in order to make sure the machine tool machines precision. If there is drive of worm wheel worm in feed transmission system, must notice, adjust good backlash, otherwise, affect machine tool performance probably directly. Additional, if there is area of synchronous tooth form in feed transmission system, also must undertake proper adjustment or change, in using system of half closed circuit especially, if this part is not inside operating ring, the fixed position precision that affects a machine tool directly. The function after 3 conclusion are transformed to can raise numerical control machine tool substantially, upgrade for the most top class high end machine tool, need to use sometimes high-powered the new-style function component that leans with Gao Ke. But often the price is very high, when using must according to actual condition, discreet choice. The article is right in accusing a machine tool to transform, number rose the method that transforms precision to undertake more comprehensive discuss, transform the direct import with be had certain to numerical control machine tool. CNC Milling