The numerical control of milling machine of X5030 vertical lifting platform transforms program

Summary: As the computer compositive production technology, intelligence is made, the research that the network makes the new idea that wait and method and development, the Chongzhongzhi that develops numerical control technology to already became our country to promote machinist trade is heavy. Carry out a proof, numerical control is transformed is the only way with machinist feasible job of development our country. Keyword: Odd a numerical control of milling machine of lifting platform of machine X5030 vertical transform 　 one, foreword 　 decides to transform program is old machine tool in undertaking counting accusing to change transforming the most important one annulus, not all old machine tool agrees with change his costume or dress numerical control machine tool, measure appropriate transformed main standard is the machine tool has a state, and numerical control changes transformed economy. Basically be in type selecting of trade off study of numerical control system, technology and economic feasibility analysis, advocate machinery of transmission, feed drive and electric part transform a few respects such as the method to undertake analysis and plan are made. The respect is being analysed in technical feasibility basically is the comprehensive analysis that has the technical current situation such as structure, function, precision to the machine tool that is transformed. Include a machine tool among them original structural design is reasonable; The fundamental component of the machine tool and structural member whether in good condition still; The mechanical drive structure that inspects each reference axis and slideway deputy form applicable; Measure each precision with current machine tool and with leave factory precision undertakes contrast, look to whether be put in difference; Sum up the major hitch that has appeared on the breakdown that at present the machine tool exists and history integratedly. According to analytic result, contrast transform target and typical workpiece, write transform design manual, the advanced sex with accomplish the machine tool after transforming to achieve certain and practical. 2, the installation 　 　 that numerical control transforms each system 1, the installation that controls a system has form of overhead suspension, cabinet, table commonly to wait. Install the make choice of of means, decide the means taking a line of all sorts of join cable and cable length directly, also matter to the convenient sex of operation and maintenance. 2, the installation of drive system, in principle adopts the installation inside electric ark this kind of means, the element of Lv of take an examination has ventilated refrigeration, cable takes line means and length, wait to the interference of other electric equipment. 3, the installation of electromotor, according to the machine tool actual, the type of flange of installation means choice of affirmatory electromotor, base type still takes base flange form, the position that extends case of wiring of direction, electromotor plus the axis, these by electromotor order goods auxiliary parameter decides. 4, the installation that surveys a system, if choose the structural pattern that coder fits inside electromotor, electromotor installation decides, it also decided; Outfit type needs the consideration that checkpost of bouncy shaft coupling, installation, cable walks along line direction and length to wait outside. After the current situation that passes pair of congener CNC Milling refers and be being analysed, put forward to undertake to milling machine numerical control changes transformed technical plan, use namely China in numerical control system (contain driving unit of ark of numerical control unit, PLC, strong report, servo and electric machinery to wait) undertake be transforminged thoroughly to this equipment. 3, the final user that numerical control transforms specific plan 　 to serve as a machine tool, the manufacturer must want to acknowledge the state of system of machine tool machine above all. Be like: At present the precision of the machine tool, the state of mechanical drive catenary, the state of guide screw, slideway, have wait without major hitch, heavy repair in order to decide whether the machine tool wants, long. Because be,charge a machine tool by number of instead of machine tool of blame numerical control, want to consider the feasibility that machinery changes his costume or dress above all so, the most important is the installation of the form of slideway and ball guide screw. Whether do the transmission clearance that should consider mechanical main transfer machinery next and transmission stiffness accord with the requirement of numerical control machine tool. To improve the utilization rate of equipment and manufacturing efficiency, the milling machine of X5030 vertical lifting platform that group of northeast spy steel checks to was purchased 1976, use MCS-51 series sheet piece machine the numerical control device that is core, it is actuating device to undertake transforming to the fore-and-aft, transverse orgnaization of milling machine into electric machinery with the pace, comprise an economy CNC Milling, control a principle. Z2- driving gear ages number transforms milling machine of X5030 vertical lifting platform, choose the ball guide screw of P=6mm, =1 of θ of step pitch horn.

5 ° / pace, =0 of pulse equivalent δ .

01mm/ pace, criterion transmission compares I=(1.

× of ° of 6)/(360 of 5 ° × 0.

01)=2.

5=75/30=z1/z2, namely driving gear ages number is 30, passive tine teeth of a cogwheel is counted 75, the accuracy class appropriate of two gear uses 7-6CGB2363-80. The key that the pace assembles into electric machinery and guide screw depends on making sure coaxial spends a requirement, eliminate gear backlash and guide screw and nut gap, guide screw should bring to bear on to tighten force beforehand, the workbench after join inside whole journey any ask to move locally phenomenon of the smooth, light, sluggish that do not have block. I use Ao Wei of the Changchun City of limited company of accurate test equipment electro-hydraulic the JKW system of servo type, the advantage of this system is to be able to reduce cost, reduce transform cost. System of this numerical control with MCS-51 sheet piece personal computer is core, use modular structure. There are 4 kinds of pattern plates inside its box, namely the computer board, power source board, interface board and drive board. Its power source uses switch power source, stabilized voltage range is wide, interference rejection capability is strong, its pace enters electric machinery high frequency torsion of the output when moving is big, still can use the computer to install origin. The numerical control that these advantages make its suit this milling machine very much is changed transform, have higher performance/price ratio. The mechanical share of milling machine of X5030 vertical lifting platform has transforming realizing numerical control through the fore-and-aft, transverse orgnaization of milling machine. To make sure milling machine can be controlled by the computer, tear open above all went fore-and-aft, transverse clutch and fore-and-aft, transverse handwheel, handwheel end passes a pair of gear and pace to connect into electric machinery, use a pace to control the shift with transverse, fore-and-aft workbench into electric machinery. The perpendicular feed of workbench still can move implementation with the hand, can make so of the transmission structure of milling machine alter decrease as far as possible, when cent malfunctions, numerical control ministry still can use manual semi-automatic operation. In using, we discover, because fore-and-aft guide screw grows milling machine, use frequent, transverse guide screw to bear the case with big load, answer to change its ball guide screw. Use ball guide screw, must use double nut to eliminate clearance and adjust tighten force beforehand, must change to its stiffness, lead at the same time stability of total sum of errors undertakes careful checking computations. The pace takes the type that the option choose of electric machinery must match with photograph of guide screw pitch. Considering common treatment precision is in 0.

1 ～ 0.

Between 2mm, can choose pulse equivalent for 0.

The pace of 01/step enters electric machinery. Make choice of θ of step pitch horn, pulse equivalent δ , after reaching P of guide screw pitch, can enter the drive between electric machinery and guide screw to compare δ of ° of I=(Θ P)/(360 according to leaving form calculation stage) =z1/z2(z2 is driving gear tine to count, z1 ages for passivity teeth of a cogwheel counts) . Transform milling machine of X5030 vertical lifting platform, choose the ball guide screw of P=6mm, =1 of θ of step pitch horn.

5 ° / Step, =0 of pulse equivalent δ .

01MM/step, criterion transmission compares I=(1.

× of ° of 6)(/360 of 5 ° × 0.

01)=2.

5=75/30=z1/z2, namely driving gear ages number is 30, passive tine teeth of a cogwheel is counted 75, the accuracy class appropriate of two gear uses 7-6CGB2363-80. (Namely precision of group of Ⅰ , Ⅱ , Ⅲ , for 7 class, the precision of △ Ea 〃 is 6 class, backlash type is C kind) the key that the pace assembles into electric machinery and guide screw depends on making sure coaxial spends a requirement, eliminate gear backlash and guide screw and nut gap, guide screw should bring to bear on to tighten force beforehand, the workbench after join is in inside whole journey any phenomenon of the smooth, light, sluggish that do not have block moves on the requirement locally. 4, after system of note 　 numerical control and milling machine are online debug must notice the following: A.

Use above all " the hand is moved " functional examination pace turns into electric machinery and change direction, be like incorrect, exchange situation connects a line into electric machinery. B.

Examination pace enters electric machinery conditions of all sorts of rotate speed movement, if do not enter electric machinery to produce acuteness vibration on some rotate speed, keep away from this one speed need not. C.

Check origin position error, can measure in origin place through securing two dial gauge, if the error is more than 0.

02mm, after should emphasizing examination nut clearance or gear clearance, lower low rate again, the trial goes what when returning origin, can achieve the oldest rate. D.

After the machine tool runs period of time, the machine tool chafes each face namely by rub add up to level to enter stability to wear away level. The on size error that this phase causes because of wearing away is very small, should eliminate transmission gap afresh. After course of this milling machine is transformed, rose to machine efficiency greatly, can raise work efficiency 3- commonly to the treatment of groovy workpiece times, make manufacturing cycle shortens. CNC Milling