A kind of fraise jig
The utility model relates to a kind of fraise jig that can carry out quick-clamping to the workpiece of needs milling simultaneously two vertical channel, belongs to metal working technical area.
Use milling machine when carrying out Milling Process to workpiece, should first by accurate for workpiece clamping on fixture, clamping precision directly has influence on machining accuracy.Traditional fraise jig generally adopts the method for scoring determination location of workpiece, then utilizes moving press plate by Work-sheet pressing.For out-of-shape workpiece, this fixture is difficult to the positional precision ensureing workpiece, and operates also more complicated.
Some workpiece utilizing milling machine to process has two orthogonal groove millings, and the clamping operation of this workpiece is more complicated.During workpiece such as shown in manuscript 1 and Fig. 2, just need to carry out twice clamping, the horizontal groove milling 16(of first time clamping aft-loaded airfoil or longitudinal groove milling 17), until horizontal groove milling 16(or longitudinal groove milling 17) after completion of processing, workpiece must be unloaded, longitudinal groove milling 17(or horizontal groove milling 16 could be processed) after re-starting clamping, because second time clamping should ensure the positional precision of workpiece, consider the perpendicularity of two groove millings again, therefore clamping difficulty can be larger, so just greatly reduces the working (machining) efficiency of workpiece.Therefore, be necessary to design a kind of fraise jig that can carry out quick-clamping to the workpiece with vertical groove milling, to improve working (machining) efficiency and the machining accuracy of this type of workpiece.
Utility model content
The purpose of this utility model is the drawback for prior art, provides a kind of fraise jig, to improve working (machining) efficiency and the machining accuracy of the workpiece with two vertical groove millings.
Problem described in the utility model realizes with following technical proposals:
A kind of fraise jig, formation comprises base plate, base, central minor axis, apotting spindle, alignment pin and pressing plate, described base plate is fixed on milling machine, the bottom center of described base is rotationally connected by central minor axis and base plate, and the fastening bolt by arranging around central minor axis between base with base plate is fixedly connected with; Described apotting spindle is inserted in the through hole of workpiece to be processed, and its one end is fixedly connected with base; Affixed with base on the locating surface that described alignment pin leans against workpiece; Described pressing plate is pressed on workpiece, and its one end is bolted on base.
Above-mentioned fraise jig, also comprises Screw tail cone pin in formation, and described Screw tail cone pin is arranged in the locating hole of base and base plate.
Above-mentioned fraise jig, also comprises feeler block in formation, and described feeler block to be positioned on base by straight pin and to be fixedly connected with base by feeler block hold-down screw.
Above-mentioned fraise jig, the fastening bolt between described base and base plate arranges individual, and their distribute along even circumferential coaxial with central minor axis.
Above-mentioned fraise jig, the described base plate one side corresponding with milling machine is provided with positioning key.
Above-mentioned fraise jig, described fastening bolt is T-slot bolt.
The utility model utilizes apotting spindle and alignment pin to position workpiece, and utilizes pressing plate by Work-sheet pressing.Only base need be rotated corresponding angle around central minor axis during processing second groove milling, so just enormously simplify clamping operation, thus improve working (machining) efficiency and the machining accuracy of workpiece.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is a kind of structural representation of workpiece;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is the top view of Fig. 3;
Fig. 5 is the clamping schematic diagram of workpiece;
In figure, each label is: 1, alignment pin; 2, straight pin; 3, feeler block; 4, feeler block hold-down screw; 5, apotting spindle; 6, pressing plate; 7, Screw tail cone pin; 8, hex nut; 9, fastening bolt; 10, central minor axis; 11, base; 12, base plate; 13, positioning key hold-down screw; 14, positioning key; 15, workpiece; 16, horizontal groove milling; 17, longitudinal groove milling.
Detailed description of the invention
Referring to Fig. 3 ~ Fig. 5, the utility model comprises alignment pin 1, straight pin 2, feeler block 3, feeler block hold-down screw 4, apotting spindle 5, pressing plate 6, Screw tail cone pin 7, hex nut 8, fastening bolt 9, central minor axis 10, base 11, base plate 12, positioning key hold-down screw 13 and positioning key 14.Base plate 12 is accurately located by positioning key 14 and milling machine; Base 11 is connected by central minor axis 10, Screw tail cone pin 7 and T-slot fastening bolt 9 with base plate 12, and after removing Screw tail cone pin 7 and fastening bolt 9, base 11 freely can rotate around central minor axis 10, to adjust machining angle.Screw tail cone pin 7 is for realizing the accurate location of base 11, and T-slot fastening bolt 9 is for being fixed on base plate 12 by base 11.Base 11 is provided with apotting spindle 5, alignment pin 1 and hook pressure plate 6, and the through hole that apotting spindle 5 and workpiece have been processed matches, and alignment pin 1 is corresponding with the locating surface of workpiece, and pressing plate 6 is for workpiece pressing.Feeler block 3 is fixed on the side of base 11.
It should be noted that, Screw tail cone pin 7 can arrange one, also can arrange multiple, when only having a Screw tail cone pin 7, a locating hole can be set on the pedestal 11, base plate 12 arranges two locating holes, during processing first groove milling, Screw tail cone pin 7 is inserted in a locating hole on base plate 12, and during processing second groove milling, Screw tail cone pin 7 is inserted in another locating hole of base plate 12.Certainly, also two locating holes can be set on the pedestal 11, and a locating hole is set on base plate 12.The method for arranging of locating hole is determined according to the angle of two groove millings.
The utility model finished hole on workpiece, as positioning datum, adopts the datum level of alignment pin 1 positioning workpieces, is completed the clamping of workpiece by hook pressure plate 6 simultaneously.Can make base 11 on base plate 12, rotate 90o(or other angle by central minor axis 10), reach the object of two the vertical groove millings of milling simultaneously.The specific works process of this fixture is as follows:
During clamping workpiece, workpiece to be enclosed within apotting spindle 5 and to make the locating surface of workpiece lean against on alignment pin 1, compressing hook pressure plate 6, workpiece and fixture are fixed as one.A groove milling of milling workpiece.Screw tail cone pin 7 is extracted after machining, unclamp T-slot fastening bolt 9, base 11 is rotated 90o, insert Screw tail cone pin 7, tighten T-slot fastening bolt 9, base 11 and base plate 12 are fixed, cutter is aligned by feeler block 3, another groove milling of processing work, unclamps hook pressure plate 6 after completing, take out workpiece.