A kind of fixture for machining gears inclined oil hole of air and using method thereof
Technical field
The frock clamp and the method and technology field that the invention belongs to machining, relate in particular to a kind of fixture for machining gears inclined oil hole of air and using method thereof.
Background technology
Traction gear is one of key components and parts of track traffic traction drive, its effect is the moment of torsion of traction electric machine to be delivered to axletree effectively and train is accelerated, or to traction electric machine generating, make train deceleration, the quality of its service behaviour directly have influence on reliability and the security of train operation the transmission of torque of axletree.Traction driven gear and axletree are general adopts large interference fit to connect, and adopts the mode of noting hydraulic oil to move back to unload.The position of oilhole is generally positioned on gear hub, and at same plane and become certain angle of inclination, oilhole top is larger flat counterbore with Gear axis, and middle part is gas thread, and bottom is 90 ° or 120 ° of angle conical surfaces and the less through hole sealing.Oilhole bottom through-hole must with bore in endless oil groove pass through mutually, if there is relatively large deviation, by directly affecting gear, move back to unload and even occur moving back the situation of unloading failure.At present, such inclined oil hole of air generally adopts numerical control device to carry out milling and drilling processing, has that clamping is complicated, working (machining) efficiency is low, high in cost of production shortcoming.
Summary of the invention
Defect in view of above-mentioned prior art exists, the object of the invention is to propose a kind of fixture for machining gears inclined oil hole of air and using method thereof, has convenient mounting and clamping, positioning precision is good, working (machining) efficiency is high, low cost and other advantages.
Object of the present invention will be achieved by the following technical programs:
For a fixture for machining gears inclined oil hole of air, comprise oilhole positioner, cover board arrangement, bracing or strutting arrangement and hold down gag; Described oilhole positioner comprises a drill jig and a drill bushing, and described drill jig is provided with an inclined-plane, offers a drill jig hole corresponding with inclined oil hole of air to be bored on described inclined-plane, and described drill jig is set with a drill bushing in hole; Described cover board arrangement comprises a pressing plate and the central layer being fixedly connected with, and described pressing plate is fixedly connected with described drill jig near a side of described central layer; Described bracing or strutting arrangement comprises a base and the eccentric disk being fixedly connected with; Described hold down gag comprises a studs; Inclined oil hole of air described to be bored is arranged on the upper surface of gear, the upper surface of described gear and described central layer fit, the lower surface of described gear and described eccentric disk fit, and described studs passes successively described cover board arrangement and gear and described bracing or strutting arrangement and is threaded connection.
Preferably, described drill jig hole is connected by interference fit with described drill bushing.
Preferably, described drill jig is square shape, and described drill bushing is cylindrical.
Preferably, described pressing plate is strip, and described central layer is circular.
Preferably, between described pressing plate and described central layer, by soket head cap screw, be fixedly connected with pin.
Preferably, between described pressing plate and described drill jig, by soket head cap screw, be fixedly connected with pin.
Preferably, described base is circular, and described eccentric disk is arc.
Preferably, between described base and described eccentric disk, by soket head cap screw, be fixedly connected with pin.
Preferably, described bracing or strutting arrangement is fixedly connected on the workbench of Rotatable indexing or the support of fixed angle by hex bolts.
A using method for the fixture of machining gears inclined oil hole of air, comprises the following steps:
1) gear is contained on described bracing or strutting arrangement, by described studs, clamps in advance;
2) horizontal centering on described drill jig, and clamp described gear by described studs;
3) utilize the technique pilot hole of described drill bushing and drill bit processing inclined oil hole of air;
4) described pressing plate rotation is left, used the special-purpose slotting cutter of tape guide socket cap to process flat counterbore;
5) use drill bit and screw tap machining screw bottom outlet, through hole and gas thread successively.
Beneficial effect of the present invention is: a kind of clamp structure for machining gears inclined oil hole of air of the present invention is simple, convenient mounting and clamping, positioning precision is good, working (machining) efficiency is high, can use plain radial drilling machine to substitute numerical control device, optimized Gearmaking Technology flow process, when batch production, can significantly reduce costs; And the present invention easily forms seriation, can be applied to the processing of the field of track traffic traction driven gear inclined oil hole of air such as electric locomotive, diesel locomotive, EMUs, city rail subway, can also be applicable to the processing of other similar gear inclined oilholes.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, so that technical solution of the present invention is easier to understand, grasp.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of the embodiment of the present invention;
Fig. 2 is the left view of the embodiment of the present invention;
Fig. 3 is the structural representation of the pressing plate of the embodiment of the present invention;
Fig. 4 is the structural representation of the drill jig of the embodiment of the present invention;
Fig. 5 is the structural representation of the central layer of the embodiment of the present invention;
Fig. 6 is the structural representation of the eccentric disk of the embodiment of the present invention;
Fig. 7 is the partial structurtes schematic diagram of the inclined oil hole of air to be bored of the embodiment of the present invention.
The specific embodiment
A kind of fixture for machining gears inclined oil hole of air of the present embodiment, as shown in Fig. 1~Fig. 6, comprises oilhole positioner, cover board arrangement, bracing or strutting arrangement and hold down gag; Oilhole positioner comprises drill jig 1 and drill bushing 2, and drill jig 1 is provided with inclined-plane 3, offers the drill jig hole 4 corresponding with inclined oil hole of air 11 to be bored on inclined-plane 3, in drill jig hole 4, by interference fit, is set with drill bushing 2; Drill jig 1 is square shape, and drill bushing 2 is cylindrical.Cover board arrangement comprises pressing plate 5 and the central layer 6 being fixedly connected with, and pressing plate 5 is strip, and central layer 6 is circular, and pressing plate 5 is fixedly connected with drill jig 1 near a side of central layer 6; Bracing or strutting arrangement comprises base 7 and the eccentric disk 8 being fixedly connected with; Base 7 is circular, and eccentric disk 8 is arc.Hold down gag comprises studs 9; Inclined oil hole of air 11 to be bored is arranged on the upper surface of gear 10, and the upper surface of gear 10 and central layer 6 fit, and the lower surface of gear 10 and eccentric disk 8 fit, and studs 9 is threaded connection with bracing or strutting arrangement through cover board arrangement and gear 10 successively.Bracing or strutting arrangement is fixedly connected on the workbench of Rotatable indexing or the support of fixed angle by hex bolts 12.Between pressing plate 5 and central layer 6, between pressing plate 5 and drill jig 1, between base 7 and eccentric disk 8, by soket head cap screw 13, be fixedly connected with pin 14 respectively.
During application the present embodiment, first, drill bushing 2 is sleeved on drill jig 1, drill jig 1 and central layer 6 are fixed on pressing plate 5 by soket head cap screw 13 and pin 14 respectively, by in 9 one mounting seat 4 of studs, the base having assembled 4 and eccentric disk 5 are fixed on the Rotatable indexing workbench of radial drilling machine or the support of fixed angle by hex bolts 12; Then gear 10 is vertically sling, the lower surface of gear 10 is fitted on eccentric disk 8, and the pressing plate having assembled 5 and central layer 6 are covered on the upper surface of gear 10, by studs 9, clamp in advance, finally use horizon rule, especially the horizon rule of short pencil shape horizontal centering on drill jig 1, aligns the axis of drill axis and drill bushing 2, in case drill bit is not because axis is just injuring drill bushing 2, by studs 9, clamp gears 10.As shown in Figure 7, inclined oil hole of air 11 to be bored is comprised of flat counterbore 111, gas thread 112, thread Pilot hole 113 and through hole 114.Inclined oil hole of air 11 to be bored moves back in the process of unloading and uses at gear, gear moves back to unload and refers to: after gear finished product (having processed oilhole) is installed with axletree (one of gearbox parts) interference fit, gear-box newly make that assembling process is reprocessed or gear-box use procedure in upkeep operation time, the screw plug of a respective tube screw thread is installed at gear oilhole place, connect oil pipe and oil pump, inject hydraulic oil, hydraulic oil is by oilhole and oil groove support gear wheel endoporus, in the situation that applying less axial force, realize the separated of gear wheel and axletree.The Main Function of flat counterbore 111 is to be convenient to follow-up boring, expands the space of this position simultaneously, is convenient to unload in gear process moving back spanner tightening operation when oiling screw plug is installed on oilhole.The conical surface of thread Pilot hole 113 moves back in the process of unloading and seals at gear, therefore higher to the requirement on machining accuracy of the conical surface.Through hole 114 moves back and in the process of unloading, plays conducting oil circuit at gear.Enforcement adds man-hour, (technique pilot hole does not belong to the part of oilhole first to utilize drill bushing 2 to bore the technique pilot hole of inclined oil hole of air of gears 10, but fabrication hole that exist, interim in machining of oil hole process, that play auxiliary guide effect), then after pressing plate 5 being rotated to an angle, use the special-purpose slotting cutter of tape guide socket cap to carry out counterbore 111 millings at the bottom of gear inclined oilhole top horizontal, use and specify specification drill bit, screw tap to carry out the processing of thread Pilot hole 113, gas thread 112 and the through hole 114 of gear inclined oilhole.
A kind of clamp structure for machining gears inclined oil hole of air of the present embodiment is simple, convenient mounting and clamping, positioning precision is good, working (machining) efficiency is high, can use plain radial drilling machine to substitute numerical control device, (new technology is the endless oil groove of elder generation's machining gears endoporus on lathe, then on radial drilling machine, utilizes this frock processing inclined oil hole of air, guarantees aligning of inclined oil hole of air and oil groove to optimize Gearmaking Technology flow process; Old technology mainly contains two kinds: the first, and processing oil groove, oilhole successively on the numerical control device (as machining center) of drive head, processing cost is high; The second, utilize the simple location of revolution tooling platform on plain radial drilling machine after, bore oilhole, the oil groove of machining gears endoporus on lathe again, the quality of this technological borehole and precision are not high, very likely there is the situation that oilhole bottom through-hole can not accurately pass through mutually with bore oil groove, and oil groove process is interrupted cut, affect cutter life, crudy and efficiency), when batch production, can significantly reduce costs; And the present embodiment easily forms seriation, can be applied to the processing of the field of track traffic traction driven gear inclined oil hole of air such as electric locomotive, diesel locomotive, EMUs, city rail subway, can also be applicable to the processing of other similar gear inclined oilholes.
The present invention is not limited to aforementioned embodiments, and those skilled in the art, under the enlightenment of the technology of the present invention marrow, also may make other changes, but as long as function and the present invention of its realization are same or similar, all should belong to protection scope of the present invention.