The necessity that numerical control of bed of press coming back transforms and main content

The necessity that numerical control of bed of press coming back transforms: Gross of our country press coming back hundreds of, and among them numerical control machine tool is very little. Equipment of the production of most production industry and enterprise, treatment counts the machine tool that is a tradition greatly absolutely, and most above is enlistment age the old machine tool in 10 years of above, manufacturing equipment and technology are dated and backward. The product that with this kind equipment treatment comes out exists generally quality difference, class low, cost is high, offer goods period to grow, be in thereby international, home market, army taste and civilian taste competition ability of the lack on the market, affect the product of an enterprise, market, beneficial result directly, affect a business live and develop. The numerical control that must improve press coming back energetically so is changed rate. Because old press coming back uses time long, schism electron component all serious already ageing, breakdown is frequent, and essential nowhere buys all sorts of machinery and electronic component, cause maintenance difficulty, some cannot have been used normally. At present very much press coming back has copy treatment with handiwork, it is labor intensity big, time is long, 2 it is to control a level to lag behind quite, precision is lower. Because this uses traditional hand to move mode of operation to machine consistency difference, effect is small, treatment quality is couldn't get assure, after investment of press coming back uses the numerical control that uses treatment of numerical control technology to already became inevitable trend to transform, because systematic operation is agile, use convenient, treatment function increases, agree with relatively complex model the treatment of face workpiece, improved manufacturing efficiency, assured to machine precision. 2.

Numerical control of press coming back changes transform main content: It is to restore primary function firstly, the breakdown part that exists to the machine tool undertakes diagnose and resumptive; It is Nc is changed secondly, on common press coming back addend controls a system, transform Cnc machine tool; It is face-lifting thirdly, to raise precision, efficiency and automation rate, undertake face-lifting to mechanical, electric part, assemble treatment afresh to mechanical part, restore former precision; The Cnc system that not contented to its production asks undertakes updating with newest Cnc; Its 4 it is the technology is updated or the technology innovates, to increase function or class, or to use new technology, new technology, in original basis the technology with aspirant more extensive travel is updated or the technology innovates, relatively what increase level and class substantially is newer transform. 3.

Transform plan: ? ? .

1 machinery transforms a new numerical control to come back press, want to achieve on the design: Have tall static dynamic stiffness; 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. Cannot think numerical control device and general accuracy machine tool join was together to achieve the requirement of numerical control machine tool, still answer main part to undertake proper design asks be transforminged accordingly making its are achieved, ability obtains anticipated transforming purpose. 3.

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Deputy logarithm of 1 sliding slideway accuses press coming back for, slideway is divided should have common press coming back outside oriented precision and craft sex, have even be able to bear or endure goodly attrition, wear away characteristic, reduce because of attrition obstruction deadly area. Want to have enough stiffness at the same time, be out of shape in order to reduce guide the influence to machining precision, should have reasonable slideway defends and lubricate. 3.

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Of guide screw of 2 ball guide screw choose basically depend on the precision that adds workpiece asks and procrastinate move torque to ask. Loss of attrition of ball guide screw is small, efficiency is tall, its drive efficiency can be in 90% above; Precision is tall, life is long; The moment of force when the moment of force that start and motion is conterminous close, can reduce electric machinery to start moment of force. Because this can be satisfied relatively high accuracy spare parts machines a requirement. 3.

Drive of 2 main shaft transforms type selecting to control the demand of craft according to coming back, main shaft designs stepless speed regulation commonly. To communicating main shaft electric machinery, use frequency control control. If vector of Xi Menzi 6se70 controls system of source of three-phase alternating voltage frequency control, its timing and it is good to have property of apply the brake, factor of efficient, high power and section report effect, wide suitable scope and other a lot of advantages and the timing pattern that is thought to have development outlook most by domestic grandfather. To electric machinery of dc main shaft, if use device of timing of direct current of word of total number of Xi Menzi 6ra70,replace original timing system. 6ra70 is three-phase alternating current source the total number control equipment of direct power supply, bulk small, structure is compact, use at dc Electromechanical center and excitation power supply to finish timing job. The advantage of this one device depends on: Itself contains parameter set unit, any additional facility that do not need other can complete the set of parameter, and all control, adjust, surveillance and add function come true by microprocessor. 3.

The company manufacturer that 3 numerical control and feed drive system produce numerical control system currently is more, of foreign well-known company be like company of Fanuc of German Siemens company, French Num company, Japan; Domestic company if company of group of system of numerical control of machine tool of spaceflight of company of Chinese Mount Everest, Beijing, China in numerical control company and Shenyang are high-grade research center of project of numerical control country. The particular case such as the requirement of the power that electric machinery of all sorts of precision that the machine tool after be being transformed according to numerical control should achieve, drive basically is when selecting numerical control system and user undertakes choosing 　 3.

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1 hand in / dc servo electric machinery procrastinates move, detecting element of system of half closed circuit installs the system of half closed-loop control that coder feedbacks inter drive on, indirect measurement carries out the position of the component. It can compensate the error of component of part of interior of systematic annulus road only, accordingly, its precision is lower than the precision of closed circuit system, but its structure and debug relatively closed circuit system is simple. For instance Xi Menzi's 1ft5, 1ft6 communicates servo electric machinery, stable and reliable, servo performance is good. 3.

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2 asynchronous electromotor or dc electric machinery procrastinate move, the closed-loop control system that grating surveys feedback the distinction of this system and open loop system is: Detect by the position such as grating the signal of real position feedback that device measures, undertake comparative with set-point at any time, will both difference is worth enlarge and commutation, drive actuator. System of closed circuit feed is more complex than system of open loop feed on the structure, cost is high also, design and be being debugged is more difficult than open loop system. But can obtain taller than system of open loop feed precision, the characteristic index with drive greater power. 3.

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3 servo a powerful person / servo oil cylinder, the closed-loop control system that grating surveys feedback is be expert at Cheng is shorter, the circumstance with big demand of pressure coming back, by servo a powerful person, the closed-loop control system that servo oil cylinder forms is a very good choice. 4.

Does machine tool numerical control transform main measure: ? ? .

After the 1 transforms certainly feasibility analysis that transforms program is passed, can show in the light of craft and machine tool besides transform program certainly, include commonly: 4.

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1 machinery is repaired with electric transform photograph band generally speaking, need to undertake electric transformed machine tool, need to undertake machinery is repaired. Of mechanical function in good condition it is electric the base that transforms a success. 4.

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2 first local hind when whole transforms measure certainly, should transform whole and electric part divide into a certain number of stature systems to undertake first, exactly the amount controls a system, measure control of system of system, main shaft, feed, face plate and strong report part to wait, after waiting for each system to shape basically again interconnection finishs whole system to work. 4.

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System of use condition selection is aimed at 3 basises use environment, temperature, humidity, dirt, power source, light, have even deny rat to feel substandard group use condition, of electrical system of this pair of selections defend function, interference rejection function, can wait from filterability of cool performance, air can provide correct basis, the electrical system after making transform had reliable use to assure. 4.

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Electrical system of machine tool of the 4 numerical control when transforming limits to have certainly is transformed, do not include this machine tool certainly whole electrical system, answer to decide according to determine scientificly and be being analysed its transform limits. 4.

The technology before 2 transformed technologies prepare to transform prepares to fill dispenses to deny, deciding to transform greatly whether gain a success. The technology prepares to include: 4.

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1 machinery prepares to be partly cooperate electric the measurement that the mechanical overhaul that transform and needs to undertake transforms, computation, design, plot, spare parts is made etc should in advance is finished. 4.

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Electric data digests 2 old systems to only electric to old system data undertakes be digestived adequately, ability understands the design ideology previously, gift is nicer complete new old system join with changeover. 4.

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Electric data digests 3 new systems new system has a lot of new functions, new technology, be familiar with technical data because of before this is transformed, answering, include attempt of systematic principle specification, line, Plc echelon graph and text, installation to debug specification, use manual, process designing manual to wait. 4.

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The changeover of interface of 4 new old systems designs overall situation to transform, should design Electromechanical to change contact of part of control of face plate of interface, operation and configuration, interconnection to wait, ask operation and maintenance are convenient, reasonable, circuit moves toward clear and coherent, join the place is little, interference of strong weak report is small, stock makes rich appropriately the quantity. Local transform, the property that still needs to consider new old system matchs, changeover of position of voltage polarity and size commutation, installation, digital-to-analogue. 4.

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5 debug measure to debug the job to involve surely really mechanical, hydraulic pressure, electric, debug measure to be able to conform to the principle of simplicity numerous, arrive as a child big, from outside to in undertake, also but first local hind overall situation, the system is rectified to undertake after subsystem first. 4.

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The 6 decides checking and accept a standard is pair of new systems assessment that check and accept a standard, when making must be practical and realistic. 4.

After be in order of 3 transformed executive preparation work, can enter transformed executive phase. Executive phase content presses time order cent to be: 4.

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Of 1 primary machine tool maintain in the round after machine tool classics is used for a long time, land of can different level is in the respect existence problem such as mechanical, hydraulic pressure, lubricant, cleanness, want to undertake maintaining in the round above all so. Next, answer a machine tool to make the geometrical precision before changing, dimension precision measure, on record. Can have directive and referenced effect to transforming the job already so, can make comparative analysis use when transforming an end again. 4.

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If be made to electrical system,the electric part maximize of 2 reservation is adjusted local transform, answer reservation electric part undertakes maximize is adjusted maintaining mixing. If the spare parts of strong report part changes, of electric machinery maintain, the drying of transformer is isolated from, contaminative cleanness, of ventilated and cooling device clean, the maximize of servo actuating device is adjusted, of ageing wire cable newer, join close solid is waited a moment. 4.

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2 primary systems dismantle primary system demolish must contrast former blueprint, undertake carefully, number is made in time on blueprint, prevent to omit or tear open too (local transform the) below the circumstance. Also can discover in the process that tear open a few new systems design medium defective part, should seasonable complement and amend.

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New system of position of new system of 3 reasonable arrangement and wiring ground designs blueprint, reasonable undertake new system is configured, include casing fixed, face plate is put, circuit is moved toward and fixed, adjust yuan of parts of an apparatus the position, sealed reach necessary adornment to wait. Should ensure means of standard of the craft that connect a line, line is not had suitably, correctly by accident, reliable and beautiful. 4.

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4 debug debug must undertake by the move that defines beforehand and requirement. Debug personnel to be recorded at any time, so that discovery is mixed,solve a problem. Sensitivity of safe protection system tries above all in debugging, prevent accident of person, equipment to happen; Each motion coordinate procrastinates board be in position of total travel center; Can carry a test for nothing, the to load after carrying for nothing first; Can of imitating test, first the fact after imitate is moved; Hotshot moves, after on the offensive is moved automatic. 4.

4 test stop work for the day is made reach groom check and accept the job to should invite the personnel that concern to attend jointly, check and accept a standard to undertake by what already made, content includes: 4.

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Function of machinery of 1 machine tool checks and accept a course to machinery is repaired and be transformed and maintain in the round, each mechanical function of the machine tool should achieve a requirement, geometrical precision should be inside formulary limits. 4.

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Function of 2 electric control and control precision check and accept electric pilot it is normal that each function must reach an action, acute and reliable. Metrological implement of standard of control precision application (wait like measuring instrument of laser interferometer, coordinate) contrast examination, reach precision range in. Still answer to make contrast with each function of the machine tool before transforming and precision at the same time, obtain quantified index difference. 4.

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3 test specimen check and accept test specimen to be able to check and accept contrail of machine tool stiffness, force, motion, related action to wait. 4.

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After 4 blueprint, data checks and accept a machine tool to be transformed, should seasonable blueprint (include graph of principle graph, configuration plan, hookup, echelon to wait) , data (include of all kinds manual) , transform archives (before including to transform, all sorts of records after) collect, arrange, file. Those who carry a data is complete, effective, successive, of this pair of this equipment it is very important that stability will move henceforth. 4.

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The technology of personnel of 5 operations, process designing grooms 　 5.

Transform what the effect is the same as other machine tool to transform photograph comparing, the numerical control of press coming back is transformed less. Assessing numerical control to change transformed average level is devoted little, pay back period is brief, investment return rate is high; Especially army tasted certain press coming back cannot be purchased from the foreign country at all, if have, also be to offer money time and price to cannot be accepted, transform to showing numerical control of some press coming back to change so, will obtain tremendous society and economic benefits. The row if 1995, plant of container of saddle hill high pressure transforms two to come back pressure implement product line of binding off machine. Already moved 7 years, still run normally up to now, get user reputably. 6.

Numerical control changes transformed advantages and disadvantages 　 6.

1 reduce investment, date of delivery short purchase to come back newly together press photograph is compared, can save 60% ～ commonly the charge of 80% . Especially cost saving of large press coming back especially apparent. 6.

2 mechanical function are stable and reliable, the structure accepts the base such as the existing lathe bed that is restricted to use it is heavy and solid cast component part, is not the sort of soldering component part, the sex of machine tool steel after transforming is good, performance is steady. But get the limitation of rigid before structure, unfavorable do transform revolutionarily. 6.

When maintenance of equipment of 3 familiar understanding, facilitating operation buys new facility, do not understand new facility to whether can satisfy its to machine a requirement. Transform criterion otherwise, know a bed accurately child 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. 6.

4 can 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. At the same time core model reachs periphery tool also can recycle. Come back commonly those who press tool charge to want to hold cost of whole machine tool 10% the left and right sides. 6.

The 5 development rate that can use newest control technology to be able to be innovated according to the technology, improve the automation level of press coming back and efficiency in time, increase equipment quality and class. 7.

Conclusion 　 1) presses a machine tool to undertake technical reformation to coming back, after the system is designing installation to debug, can reach main technique target of the regulation, move can stabilize reliable. 2) system software increased a lot of special functions, went to the lavatory user process designing, expanded the treatment craft limits of press coming back. 3) presses a machine tool to undertake Cnc technical reformation to coming back, feed system precision can rise somewhat than before; To using the press coming back of communication servo technical reformation, system of its feed drive uses communication servo electric machinery, function is reliable, precision is more stable. 4) presses a machine tool to undertake Cnc technical reformation to coming back, social benefit and economic benefits are obvious. CNC Milling