The method of the finishing milling
(57) Abstract:The invention relates to mechanical engineering, in particular to the cutting process. Effect: improve the quality of the workpiece, the processing capacity, the expansion of technological capabilities. Is achieved by the fact that when fine milling in the direction of the working movement of the cutting edges of the cutter's axis tilt to the direction of milling in the direction of the output ends of the cutting edges. The speed milling can be increased with a corresponding decrease in the speed of the working movement of the edges, the reduced slope of the edges, and increased the angle of the axis of the cutter. 1 C.p. f-crystals, 2 Il. The present invention relates to mechanical engineering, in particular to the cutting process.Known (C. F. Beavers. Fundamentals of theory of metal cutting. M. the motor cycle", 1976, S. 66 - 74) the method of cylindrical milling cutter. The technological capabilities of its quality and performance is limited by the height of the unevenness of processing.Known (and. with SU 1009646, 23 B C 3/00, 1983) method of milling end face of the body of rotation of a cylindrical milling cutter with an inclination to the axis of the cutter to the direction of milling. The drawback is the uneven slope of f is the Objective of the proposed method is the expansion of technological capabilities, simplifying, improving the quality and performance milling in the direction of the working movement of the cutting edges of the cutters with the tilt axis to the direction of milling.The problem is solved by tilting axis in the direction of the output ends of the cutting edges, increasing speed milling with a corresponding decrease in the speed of the working movement of the edges, the angle of inclination and the increase of inclination of the cutter.The method explain the diagram (Fig. 1 and 2), which marked the height of the cut plane, the angle of inclination of the cutting edges of the cutter, the angle of inclination of the axis of the cutter from the perpendicular to the direction of milling, the angle of inclination of the ridges cut by forming cutters, Sz- feeding speed S during rotation of the cutter tooth with velocity V, D is the diameter of the cutter.From the diagrams it is obvious that with increasing angle of inclination of the cutting edges increases the angle of the crests of the cutting and decreases the distance H between them. To spur cutters H = KOn the basis of the scheme are:
< / BR>The plus sign corresponds to the symbols on the diagram and corresponds to the inclination of the axis of the cutter in the direction of the output ends of the cutting edges. The sign "minus" means in the first bracket, the direction of velocity V in a reversed pattern with the visible usefulness of inclination of the axis of the cutter in the direction of the output ends of the cutting edges and its increase. Significant performance improvement is achieved by increasing the speed ratio S/V within their amount, not exceeding the normal cutting speed S + V Vn. When speed milling S, much greater speed V of rotation of the cutters, screw cutting edge becomes the source of the cut surface finish. The decrease in the slope of the edges reduces this danger. The best results in terms of performance, quality, simplicity, and expanding technological capabilities are achieved when milling at a speed several times greater speed of rotation of the spur cutters with a large tilt axis to the direction of milling. When V = 0, the method degenerates into the wide planing cutter with a small angle of its edges to the planing direction with speed S = Vn.The method can be widely used for finish milling of surfaces. 1. The method of the finishing milling in the direction of the working movement of the cutting edges of the cutters with the tilt axis to the direction of milling, characterized in that the milled with an inclination to the axis of the cutter in the direction of the output ends of the cutting edges.2. The method according to p. 1, characterized in that the milled more skorosti tilt axis of the cutter.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to machining of cellular fillers on five-coordinate numerically-controlled machine tools. Method comes to setting plane of rotation cutting tool at angle to surface to be machined. To improve accuracy owing to corresponding space orientation of cutting tool in process of machining of machining, alignment of axis of cutting tool with plane determined by straight line connecting point of touch with following support point and vector of normal to machined surface are provided by additionally turning axis of cutting tool around vector of its linear displacement. Disk cutter can be used as cutting tool.
EFFECT: improved accuracy of machining.
2 cl, 3 dwg
FIELD: metal cutting processes and equipment, milling by means of end milling cutter blades of one-piece impellers of gas turbine engines in number program control machine tools.
SUBSTANCE: method comprises steps of rough working for cutting inter-blade grooves of the same width in radial direction and finishing for milling blade along height. Both types of working are performed at one mounting operation. In order to improve accuracy, working is performed along lines and depth of each line is set more than thickness of deformed layer of blank after previous working. For each line deformation value of worked surface of impeller is set more than deformation value of worked surface after working i-line.
EFFECT: enhanced accuracy of working.
4 cl, 5 dwg
FIELD: engineering tools, particularly to repair axle openings of side freight car truck frame inside wagon depot.
SUBSTANCE: milling machine comprises bed with horizontal guiding means, frame fixedly secured to the bed, slider with spindle head, spindle with mill vertically inserted in the head, mill drive and positioning device having pressing means mounted on frame and adapted for article to be processed fixation. Spindle head is additionally provided with two parallel horizontal spindles having drive. Each horizontal spindle has mills, wherein one mill is arranged from each opposite slider side.
EFFECT: increased productivity.
4 cl, 5 dwg
FIELD: machine tool manufacture, working elongated or short parts.
SUBSTANCE: machine tool includes housing for mounting worked part and milling module with milling cutter. Milling module is arranged in rest that may move long and across worked part. In order to enhance accuracy of working due to lowered influence of cutting efforts upon worked part absorption of temperature stresses occurred in system and provision of high parameters of micro-irregularities, roller stops are mounted in housing for mounting working envelope made of elastic material with worked part molded into it. At both sides of milling cutter in milling module height-regulated supporting skies are arranged; said skies engage with elastic supporting sites of working envelope of part. Milling module is mounted in one end of tie rod rocking in articulation joint of rest. Counter-weight is arranged on other end of tie rod and it is spaced by adjustable distance from said articulation joint.
EFFECT: enhanced accuracy of milling part.
FIELD: nuclear power engineering, dismounting radioactive equipment of nuclear power plants.
SUBSTANCE: method comprises steps of using standard metal cutting tools. In order to enhance safety, there are used: rotary dismounted basic lid of biological protection with slits for moving ropes, suspended unit-modules and cargo-lifting machines with flexible cargo-carrying member in the form of rope to which changeable module-units are joined for cutting body of radioactive equipment by fragments. Module-units are based on inner surface and on edges of said radioactive equipment and they include cutting units with disc milling cutters; feeding units for linear motion of cutting units in guides and assemblies for mounting module-units.
EFFECT: enhanced efficiency and safety of method.
FIELD: metal machining.
SUBSTANCE: method comprises setting the device for securing the blade in the machine-tool, securing the blade to the device, measuring deviation of its actual position from the position of the reference blade, and orienting the device together with the blade until the axis of the blade and axis of the machine-tool is aligned. The device has lid and plungers. The lid is mounted inside the housing and closed with respect to it. The lid receives plungers and clamping members that are unmovable. The plungers pass through the housing, are spring-loaded with respect to it, and can axially move.
EFFECT: enhanced precision of machining and simplified structure.
2 cl, 3 dwg
FIELD: working parts by cutting, namely processes and equipment for making aircraft engines.
SUBSTANCE: in order to enlarge manufacturing possibilities and to improve efficiency, cutting of back, trough and bottom of inter-blade duct is realized simultaneously for one technological procedure by means of one annular cutting tool and blade edges are further worked before finishing them. Rotation axes of tool and mono-impeller are arranged in such a way that they cross by predetermined angle depending upon curvature of worked surfaces while providing rectilinear motion of cutting tool along three axes of three-dimensional coordinate system and rotation of cutting tool around said three axes. Tool includes cutting end members arranged along annular perimeter of body. Tool is in the form of T-shaped cutting members arranged uniformly along perimeter of annular body with width equal to that of inter-blade duct in root cross section. T-shaped cutting members have end, outer and inner lateral cutting edges. Diameter of circle described around outer lateral cutting edges of tool is equal to that of circle inscribed to trough profile of mean cross section of blade by three points. Non-equal legs of outer and inner lateral cutting edges of trough profile correspond to twisting value of blades along height and spacing from rotation axis of cutting tool till projections of nearest points of inlet and outlet edges of boundary cross section of inter-blade duct on rotation plane of tool. Length of T-shaped cutting member is determined by value exceeding depth of inter-blade duct.
EFFECT: enlarged manufacturing possibilities, improved efficiency.
2 cl, 6 dwg
FIELD: machine engineering, working profiles of rolling surfaces of wheel pair of railway road transport vehicles.
SUBSTANCE: method comprises steps of imparting rotation and feed motion along worked surface to blank and to milling cutter in body of which cutters having round cutting tips of hard alloy are mounted. In order to enhance efficiency and quality of working milling cutter is provided with damping member in the form of washer like corrugated spring. Body of milling cutter has trapezoidal radial grooves enlarged to axis of milling cutter and designed for placing said cutters with cutting tips of hard alloy engaged with damping member. Surfaces of radial grooves are faced with bronze porous self-lubricating plates. All said plates except one lateral plate are plane-parallel and they are fixed to body. Said lateral plate is in the form of wedge and it is designed for adjusting gap between it and cutter with use of screw. Cutters in the form of trapezium reciprocal to radial groove of milling cutter body are mounted in said grooves by sliding fit and they are hold in grooves by means of first lid at one end and by means of damping member and second lid at other end. Lids are secured to body by means of screws designed for adjusting elasticity of damping member.
EFFECT: enhanced operational reliability, increased vibration resistance of milling cutter.
2 cl, 7 dwg
FIELD: metal working, in particular, working of rolling surface profile of wheel pairs for railway transport.
SUBSTANCE: method involves transmitting rotational motion and feeding motion to profile cutter mounted on holder and to blank; using cutter located on mandrel for rotation in slider bearings formed as bushings and in thrust roller bearings. One end of cutter is made corrugated for joining to mated corrugated end of coupling mounted on mandrel in slots for axial displacement and biased by nut to cutter with the help of damping member formed as disk spring. Other end of cutter is biased with the help of nut through one of thrust roller bearings. Before machining, resiliency of damping member may be regulated for increasing resistance to vibration, providing continuous-intermittent bringing into contact and separation of cutter teeth from contact with surface under machining process, said surface having thermomechanical and other defects.
EFFECT: increased durability, enhanced reliability in operation and increased efficiency.
3 cl, 7 dwg
FIELD: working materials by cutting, cutting tools.
SUBSTANCE: head includes two cutter heads kinematically connected one with other and having at least two similar cutters. One cutter head is adjusted for preliminary rough working and other cutter head is adjusted for finish working at axial feed. Cutter heads are arranged one opposite to other by inclination angle (determined according to given formula) relative to plane normal to blank axis and passing through center of worked spherical surface. Paths of rotation of head cutter apexes have common point arranged in lengthwise axis of blank. Heads may be rotated from one drive unit at the same revolution number for timing motion of cutters due to successive alternative passing of said common point by cutters of rough and finish heads.
EFFECT: enhanced efficiency of turning high quality and high accuracy spherical surfaces.