Special treatment machine tool introduces compressor odd screw

005mm. Use main shaft case but a machine tool of transverse shift can machine diametical φ between 385mm of 95 ～ φ the screw of a kind of any norms. Because machine φ the screw of diameter of 385mm of 95 ～ φ , the distance difference of the end panel before causing main shaft and space of cutting tool centre of turning circle has been been worth big, design the machine tool of two kinds of norms when applying actually accordingly, a machine tool machines φ the screw of diameter of 205mm of 95 ～ φ , another machine tool machines φ the screw of diameter of 385mm of 180 ～ φ . Advantage: The machine tool can get used to the treatment of a variety of norms screw, the screw of every kinds of norms does not need to provide corresponding treatment machine tool. Defect: The assembly of the structure of the machine tool and machine tool relatively before 2 kinds of machine tools are complex, the cost of the machine tool also relatively before 2 kinds of machine tools are tall. 2, the discretion of the main shaft precision of the vertical on the horizontal main shaft of the case of main shaft of machine tool of main shaft structure that introduces a machine tool and base decided to be machined the precision of screw, when at the same time screw rotates with the thousands of speed high speed that turn in compressor, the screw with poorer precision can make compressor produces calorific, oscillatory, efficiency low, wear away to wait for a phenomenon quickly. The structure of main shaft of machine tool of odd screw treatment that home has at present has roughly the following two kinds of plan. The first kind: The bearing before the main shaft of main shaft structure with bearing radial not adjustable windage uses cylinder of a biserial roller bearing and combination of two thrust ball bearing, bearing of roller of cylinder of use biserial of this main shaft bears radial cutting force, use two thrust ball bearing to bear axial cutting force. The bearing after main shaft uses cylinder of a biserial commonly roller bearing or use an afferent ball bearing. The advantage of structure of this kind of main shaft: Machine and assemble of main shaft simple, cost is inferior. Defect 1: Because the radial windage of main shaft bearing cannot be adjusted, main shaft precision is so poorer. Although can use the internal diameter of bearing and axial means be filled with the radial windage that cooperates to eliminate bearing too, but the internal diameter of every bearing and radial windage are not a fixed cost, give accurate axis very hard the fits tolerance of diameter and bearing internal diameter because of this is designed and adding man-hour. Defect 2: Buy very hard in the market homebred or the thrust ball bearing of class of class of the C of the entrance, D or P4, P5, bearing of commonly used and average level replaces machine tool manufacturer use, this action also affected main shaft precision rise. The main shaft structure with bearing radial not adjustable windage applies to the general accuracy machine tool of general precision, do not apply to taller to requirement of main shaft precision machine tool. The 2nd kind: Afferent thrust ball bearing combines the bearing of biserial cylinder roller that the bearing before the main shaft of main shaft structure with bearing radial adjustable windage uses round taper hole of class of a P4 and a biserial of P4 class. The bearing of biserial cylinder roller that this main shaft uses conic opening bears radial cutting force, use biserial is afferent thrust ball bearing bears axial cutting force and force of partial radial cutting. The bearing of biserial cylinder roller that the bearing after main shaft uses conic opening of class of a P5 commonly. The inner ring of bearing of roller of cylinder of conic aperture biserial and cooperate axial diameter to all be 1: 12 conic, bearing of locking of the nut that use a circle makes bearing produces a displacement to make the inner ring of bearing expands in axial, achieve the goal that decrease or eliminates bearing radial windage thereby. The advantage of structure of this kind of main shaft: Main shaft precision is taller. The end panel that measures main shaft on diameter of 230mm of φ of face of main shaft front beats the value is 0.

010mm. The radial and jumpy value that measures main shaft on the circle outside 230mm of φ of main shaft front is 0.

005mm. The main shaft precision of the 2nd kind of structure rises than precision of the first kind of main shaft 50% the left and right sides. The defect of structure of this kind of main shaft: The treatment technology of main shaft is more sophisticated, the worker that the assembly of main shaft also needs to have experience operates ability to make main shaft precision reachs good numerical value. 3, the deepness that the controls different diameter screw of deepness of cutting tool feed needs to machine helix chamfer is different also, the deepness of helix chamfer differs to more than 100 millimeter from a few millimeter, orgnaization of cutting tool feed needs to rotate about thousands of ability finishs feed the treatment of spare parts of a screw. Because orgnaization of cutting tool feed completes feed action even while cutting tool rotates, so a few commonly used on general accuracy machine tool machinery, electric control cuts deep method not to apply to odd screw to machine a machine tool. The orgnaization of cutting tool feed of machine tool of odd screw treatment uses the method that differs below to be able to achieve the goal that controls feed deepness. The first kind: Attrition clutch and deepness of feed of cutting tool of electric switch control its control principle is cutting tool is cut deep the load of orgnaization of feed of the cutting tool when increasing is twisted be apart from increase, make the attrition clutch in catenary of drive of orgnaization of cutting tool feed skids, a mechanical linkage mechanism sparks electric switch is intercurrent phonate, smooth signal clew handlers, right now handlers operates the power that opens orgnaization of cutting tool feed artificially. This kind of advantage that commands a method is: Control method reachs spare parts treatment and operation simply not to suffer the effect that cuts off the power suddenly. Defect is: The screw that machines different diameter needs those who adjust reed of dish of attrition clutch impaction to tighten force beforehand. Because every density with screw qualitative material, hardness exists,slight difference reachs cutting tool sharp degree also is put in difference, because this makes this kind of precision that controls a method not quite accurate, the deepness common difference that causes screw helix trough possibly is too big. The 2nd kind: In controlling system of feed of cutting tool of deepness of cutting tool feed with combination of electromagnetism clutch, coder, reach a pair to use what cutting tool turns the circle is counted at detecting to measure fast gear and a coder of electromagnetism clutch. Its control principle is the handiwork when cutting tool just contacted screw surface the coder that start writes down several switch, the device that note number begins to note number, rotate when cutting tool when cutting deepness is being achieved namely when the circle of set is counted beforehand, spare parts of handlers of clew of intercurrent phonate, smooth signal already machined the momentum that electromagnetism clutch breaks make sb the first aim of attack automatically to provide feed end. Should detect device shows a watch to show feed encircles number or feed through number. After electromagnetism clutch come away, cutting tool rotates along with vertical scroll of painting or calligraphy only and move without feed. This kind of advantage that commands a method is: The control of deepness public errand of screw helix chamfer is more accurate, because know exactly about sth shows a watch to show the deepness that wants treatment or the deepness that the circle is counted and already machined or circle are counted, very intuitionistic also on the operation and convenient. Defect is: The electric control of the machine tool is more complex if plant area cuts off the power suddenly,at the same time method of this kind of control is in when spare parts treatment, beforehand the data of set will be missing. If accumulator is joined in electric control, make in cut off the power dimension initial stage is maintained detect the job of device, afore-mentioned problems can get settlement. 4, when the machine tool of treatment of control odd screw of positive drive clearance is machining screw, because helix chamfer is,complete treatment below the combination that cutting tool rotates with workpiece. What when just cutting work cutting tool is rotating is tangential get on direction walk along Dao Kang power is greater, cutting tool falls in the action of helix chamfer when will cut a work, what cutting tool is rotating is tangential get on direction walk along Dao Kang lesser, it is to get even the thrust of workpiece helix chamfer. Because existing,aperture of machine tool casing adds all sorts of errors such as labour, gear cutting, the transmission gap of cutting tool runner shaft coming back is too big, common says Kuang Liang is big. Detect the method with transmission too old clearance is motivation input axis is secured and the left and right sides rotates rock take-off, if be to use groovy transmission structure to design production machine tool, the transmission clearance of take-off places horn to go to a few degrees in ten degrees. Transmission clearance causes the helix chamfer of screw to machine the surface to have the apparent mark that receive a knife greatly too, affected the treatment precision of screw thereby. The transmission gap that the machine tool is assembling runner shaft of the cutting tool after finishing coming back is too big, it is the effect that gear suffers all sorts of errors actually, those who create gear backlash is too big. No matter the gear cutting in drive of machine tool machinery uses precision of a few class, the architect is apart from machining error, temperature considering center of the production error of gear, casing ply of change, lube film, assemble the element such as the error, design of machine tool drive must make sure positive drive leaves the backlash with have certain, the size of backlash decided the size of public errand of gear transverse tooth thickness. Of machine tool of odd screw treatment advocate transmission structure has distinction the characteristic at other machine tool. At present to reduce or receive reasonable transmission clearance odd screw machines a machine tool to often adopt below in order to two kinds of measure. The first kind: On take-off installation holds brake in the arms to rotate in cutting tool round radial and symmetrical position contains outside take-off hold brake in the arms, the front that hold brake in the arms withstands cutting tool rotates of take-off outside round, hold brake in the arms to be tightened beforehand for bedspring. The working principle that adopts brake is to rely on the attrition force of the generation that hold brake in the arms to increase take-off damp, the whirl that reduces an axis sensitivity. The advantage is: The structure that hold brake in the arms is simple and do not change structure of original machine tool, the ground connection between this kind of method achieved the goal that reduces transmission gap, there is certain effect in applying actually. Defect 1: Because brought to bear on to the circle outside cutting tool take-off,bedspring holds brake in the arms closely beforehand bigger radial load, the load that increased a machine tool actually is twisted be apart from, cause electric machinery power to increase, at the same time gear, bearing wears away accelerate. Defect 2: Because brought to bear on to the circle outside cutting tool take-off,bedspring holds brake in the arms closely beforehand bigger radial load may be right the geometrical precision of cutting tool take-off causes negative effect. The 2nd kind: Double positive drive advocate the facewidth of all driving gear in transmission increases 1/3 ～ 1/2. all passive gear make it two structures, a gear is original gear, another is to use the gear that reduces transmission gap, its facewidth is the 1/3 ～ 1/2 of original gear facewidth about. Install two gear semifinished product together with several bolt and twist dead age in recycle. After making a tooth-like part of anything, be gear outfit on machine tool transmission shaft, loose gear secures bolt, the gear that will make an appointment with facewidth of 1/3 ～ 1/2 forward the directional roll gear with this gear contrary whirligig, the size of rotational angle with gear backlash of the gear when the long-term job, biggest temperature rise is more than 0. The working principle of double positive drive is to use the wider gear in double gear to transfer power, narrower gear rises to reduce the effect of transmission clearance. The tooth form that treats two gear after adjusting along axes line has minim amlposition. Structural advantage: Be apart from factual machining error according to making center of error, casing actually of gear, wait for an element, adjust what the transmission clearance of gear makes to be in a reasonable range, compare with photograph of the structure that hold brake in the arms more reasonable, applicable. Structural defect: Because gear facewidth increases, the axial dimension of transmission shaft is increased, and stay even on casing gear adjusts used window, the machine tool that this kind of method applies to new design only and the production cost that raised a machine tool. Conclusion: The article introduced home to have odd screw to machine the layout of the machine tool and structure from 4 respects, list actor defect one by one come out, because the odd screw of compressor manufacturer machines machine tool and machine tool data to keep secret external, above introduction hard to avoid has one-sided, inappropriate place, because this supplies manufacturer of odd screw compressor only,consult. CNC Milling