The utility model content
The purpose of this utility model provides a kind of rough milling machine, is used for the roughing of major diameter curved tooth awl tooth.
The technical scheme that adopts:
A kind of rough milling machine comprises that lathe bed, slide unit, unit head, workpiece clamp indexing means, facing cutter, milling cutter, electric cabinet and oil cooling system, is characterized in that:
Lathe bed connects into an overall structure by first lathe bed and second lathe bed by bolt, on the lathe bed upper surface rectangular guideway is arranged, and on the lower surface of slide unit plastic-sticking guiding rail is arranged, and plastic-sticking guiding rail and rectangular guideway form the rail plate pair;
Unit head is fixed on the upper surface of slide unit, slide unit is provided with leading screw screw mechanism, the leading screw outer end is connected with the output shaft of worm and gear and planetary gear reducing mechanism, the power shaft of worm and gear and gear reduction is connected with the output shaft of first variable-frequency motor, and unit head and slide unit can move along the rectangular guideway on the lathe bed upper surface;
Milling cutter is fixed on the facing cutter, and facing cutter is fixed on the front end face of facing cutter main shaft, and the facing cutter rear-end of spindle is connected with the output shaft of gear reduction unit, and the power shaft of gear reduction unit is connected with the output shaft of second variable-frequency motor;
Workpiece clamps indexing means, comprises that spur gear protractor, workpiece spindle box, workpiece clamp pallet and tray for work pieces main shaft; The spur gear protractor is installed in the tray for work pieces rear-end of spindle, and the tray for work pieces main shaft passes and clamps pallet with workpiece behind the workpiece axis hole on the workpiece spindle box and fixedly connected; The second lathe bed upper surface is provided with arc track, is provided with trapezoidal slide block in arc track, and trapezoidal upper end of slide block is connected with workpiece spindle box, and workpiece spindle box can move along arc track.
Described second lathe bed is provided with protective cover.
The elemental motion principle of rough milling machine is: at first, workpiece clamp is clamped and calibration, secondly, rotation and feed motion by cutter realize cutting function, and suitable operation control system and necessary protection facility will be arranged at last.As shown in Figure 1: this lathe is by lathe bed, mechanical skid plateform (feeding), unit head (dish milling cutter), workpiece box (workpiece), calibration clamping device, Hydraulic Station, cooling system, and protective cover and electric cabinet are formed.The course of work of rough milling machine is simply described as follows: at first workpiece is installed on the anchor clamps, turn over a root angle around fixing pivot, move laterally to position and locking according to the horizontal range of calculating good workpiece and cutter shaft, hydraulic clamp is coiled the milling cutter rotation and is gone forward side by side to carrying out plunge milling then, finishes the processing of a teeth groove, manual rotational workpieces and locate then by the index dial calibration, hydraulic contracting carries out the processing of next tooth, all finishes until all teeth.
The utility model advantage is:
As shown in Figure 1, for the ease of making and processing, lathe bed 1,2 is all formed by high-intensity grey iron casting, uses Bolt Connection.Lathe bed adopts edge system steel quenching rectangular guideway and forms the rail plate pair with the plastic-sticking guiding rail of mechanical skid plateform, and mechanical dynamics property and antifriction characteristic are preferably arranged, and the huge tilting moment that can be hard to bear produces during Tool in Cutting.The rotation of dish milling cutter is to be driven, passed on the facing cutter main shaft of mounting disc milling cutter through gear reduction box by variable-frequency motor; The feed motion of dish milling cutter is to drive worm and wormwheel and planetary gear reducing mechanism by another variable-frequency motor, and then drives the secondary amount of feeding of realizing being low to moderate 0.01mm of major diameter trapezoidal screw screw.At the less situation of product category, we adopt through the accurately machined spur gear of gear hobbing (number of teeth is identical with product) as index dial, have avoided expensive numerical control worm and gear indexing system.The clamping mode of main shaft adopts hydraulic contracting.Adopt PLC to control the automatic do action of lathe, make circuit comparatively simple, more economical and practical than the digital control system of costliness.Owing to coil the milling cutter costliness and guarantee the technology allowance; thereby their protections are just seemed especially important, therefore, we not only have feeding to stop travel switch on circuit design; and when feeding stops the stroke malfunctioning switch, also be provided with protection switch cutter and workpiece are all stood intact.
In addition, owing to adopt the fluid cooling and wash away the iron filings mode, jumbo fuel tank and large discharge pump have also been designed, the effect that reduce the oil temperature, strengthens cooling and dash bits, protective disc milling cutter.
The specific embodiment
A kind of rough milling machine comprises that lathe bed 1 and 2, unit head 4, slide unit 3, workpiece clamp indexing means, facing cutter 5, milling cutter 6, oil cooling system and electric cabinet 7.Oil cooling system wherein, electric cabinet 7 and Hydraulic Station are known technology.
Lathe bed is two body structures, is connected and composed by bolt by first lathe bed 1 and second lathe bed 2.Rectangular guideway 8 is arranged on the lathe bed upper surface.Plastic-sticking guiding rail 9 is arranged on the lower surface of slide unit 3, and slide unit 3 is arranged on first lathe bed 1, and plastic-sticking guiding rail 9 forms the rail plate pair with rectangular guideway 8.Unit head 4 is fixed on the upper surface of slide unit 3.Slide unit 3 is provided with leading screw screw mechanism, leading screw 27 outer ends are connected with the output shaft of reducing gear 13, reducing gear 13 is worm and gear and planetary gear reducing mechanism, the power shaft of reducing gear 13 is connected with the output shaft of first variable-frequency motor 12, realizes that first variable-frequency motor 12 drives the feed motion of slide unit 3 on rectangular guideway.Facing cutter 5 is fixed on the front end face of facing cutter main shaft 10, and facing cutter main shaft 10 is linked to each other through the power shaft of shaft coupling 29 with gear reduction unit 30 by second variable-frequency motor 11, and the output shaft of gear reduction unit 30 and facing cutter main shaft 10 are direct-connected, drives the milling cutter rotation; Clamp mechanism is a hydraulic clamping system; Workpiece clamps indexing means, comprise spur gear protractor 28, the hydraulic control that workpiece spindle box 14, workpiece clamp pallet 15, tray for work pieces main shaft 16, protective cover 17, be installed in tray for work pieces main shaft 16 rear ends is held tightly or is declutched and hydraulic clamp, navigation system (see figure 4).Spur gear protractor 28 is installed in tray for work pieces main shaft 16 rear ends.Tray for work pieces main shaft 16 passes and clamps pallet 15 with workpiece behind the workpiece axis hole on the workpiece spindle box 14 and fixedly connected, and workpiece 18 clamps pallet 15 by workpiece and is fixedly clamped.Be useful on the arc track 25 of regulating root angle on the lathe bed 2, be provided with trapezoidal slide block 26 in arc track 25, trapezoidal slide block 26 is connected with workpiece spindle box 14 bolts.Working-spindle case 14 can move along arc track 25.
Hydraulic clamp navigation system: comprise that Hydraulic Station 19, first holds oil cylinder 20, second tightly and hold oil cylinder 21 tightly, realize the hydraulicdirectional control valve 22 (holding tightly and declutching in order to Control Shaft) that workpiece spindle is held tightly or declutched, jam-pack oil cylinder 23, location jam-pack when realizing calibration and the hydraulicdirectional control valve 24 that unclamps, and (in order to realize calibration location jam-pack calibration spur gear alignment pin or change tooth add withdraw from the calibration alignment pin man-hour).