CN2081777U

CN2081777U - Fixture for sharpening drill bit and hobbing

Info

Publication number: CN2081777U
Application number: CN 90215608
Authority: CN
Inventors: 杜汇梓
Original assignee: SHANGHAI-YICHU MOTORCYCLE Co Ltd
Current assignee: SHANGHAI-YICHU MOTORCYCLE Co Ltd
Priority date: 1990-12-28
Filing date: 1990-12-28
Publication date: 1991-07-31

Abstract

The utility model discloses a fixture for sharpening a drill bit and a hobbing, overcoming the defects of difficult sharpening processing, complex operation and poor sharpening quality of a drill bit, a key slot hobbing, an end hobbing, etc. The utility model ensures that the cutting edge symmetry of the drill bit, the key slot hobbing and the end hobbing is good; the center is not deflected through using the two jaws self-centering structure. The utility model also improves the work efficiency and the working quality of the cutting edge sharpening processing of the drill bit, the key slot hobbing and the end hobbing. The graduation is simple through using the fixture for sharpening a drill bit and a hobbing. The processing requirement can be satisfied through replacing a corresponding equi-index plate according to the cutting edge processing quantity of the drill bit, the key slot hobbing and the end hobbing. The various different types of relief angles, apical angles and chisel edges can also be processed through the adjustment of the sharpening angle part.

Description

Fixture for sharpening drill bit and hobbing

The utility model belongs to metal processing cutlery grinding class anchor clamps, is specially adapted to the grinding of the drift angle, relief angle, chisel edge etc. of the drill bit, cotter mill cutter, slotting cutter etc. of different-diameter.

The cutting edge grinding of general drill bit except that manual processing, is used special purpose machine tool processing.Add and man-hour the shank of drill bit is fixed, carry out grinding again after with clamping device drill bit being clamped.Longer because of clamping point from the distance of sharpening processing stand, be easy to generate vibration during grinding, influence grinding fineness.The drill bit that generally dispatches from the factory in addition is some bending all, the measured crooked 0.2～0.3mm of matter, and ropy bending surpasses 0.4mm.So clamp between trepanning and the drill bit and need bigger gap, and after fastening bolt screws, workpiece is subjected to the influence of monolateral power, often makes the center line of workpiece of grinding and the center line of clamping device produce skew, thereby it is asymmetric to produce two cutting edges of sharpening processing back cutlery drift angle.Even (drill bit of the measured bending of matter about 0.2mm, experienced operative employee adjusts the drill bit of back sharpening with one heart, and the symmetry of its drift angle two cutting edges still has the above deviation of 0.05mm.）

The purpose of this utility model is to improve the operating efficiency and the work quality of drill bit, milling cutter edge grinding processing, overcomes the defective of drill bit drift angle two cutting edge symmetry differences, alleviates labor intensity of operating personnel and operation easier.

Accompanying drawing is a structure chart of the present utility model:

1 is the Fixture for sharpening base among the figure, the 2nd, wave axle, and the 3rd, wave axle bolt, the 4th, connecting plate, the 5th, wave shaft coupling, the 6th, trip bolt, the 7th, index dial, the 8th, the axis of guide, the 9th, connecting plate lining, the 10th, clamp jaw, the 11st, tapered cup nut, the 12nd, gripping sleeve, the 13rd, collet body, the 14th, calibration retainer spring, the 15th, calibration alignment pin, the 16th, Screw, the 17th, calibration push-piece, the 18th, guide spring, the 19th, guide nut, the 20th, the guiding trip bolt, the 21st, fairlead, the 22nd, turn to body, the 23rd, turn to the body bolt, the 24th, turn to body bushing, the 25th, wrench, the 26th, angle square turns to body.

Structure of the present utility model is divided four parts, i.e. (one) retained part, and by collet body, gripping sleeve, clamp jaw, tapered cup nut forms. The workpiece such as drill bit are installed in the collet body, fix with clamp jaw. Clamp jaw is by the axial symmetry setting, and the quantity of clamp jaw can be established 2～3 according to the cutting edge number of processing work. (2) calibration part is by index dial, the calibration retainer spring, and the calibration alignment pin, calibration location push-piece, connecting plate, trip bolt, Screw forms. According to the cutting edge number of the workpiece that is fixed on retained part, mix corresponding index dial and can carry out two, three, four ... five equilibrium. (3) targeting part is by the axis of guide, fairlead, and guide spring, guider screw, guide nut forms. Length according to processing work is adjusted. (4) grinding angle is regulated partly and is formed 01 by connecting plate lining and collet body; Connecting plate and swinging shaft joint form 02; Swinging shaft, swinging shaft bolt and swinging shaft joint form 03; Swinging shaft forms 04 with turning to body bushing; Turn to body and angle square to turn to body to form 05; Fixture for sharpening base and angle square turn to body to form 06. 01,02,03,04,05 and 06 all can adjust respectively. Retained part relies on connecting plate and grinding angle to regulate part and calibration partly makes up, and targeting part is combined on the collet body, and all parts are all used general steel processing and fabricating, and wherein the head of collet body and clamp jaw preferably adopts the higher steel of hardness to make.

Embodiment of the present utility model is as follows:

Utilize two holddown grooves on the Fixture for sharpening base, these anchor clamps are fixed on the platen.Cutting edge number according to the processing cutlery is mixed corresponding equi-index plate, routine fluted drill, index dial is installed in drill bit in the collet body with halving, and fixes with two clamp jaws, adjust simultaneously lead and corresponding angle after just can carry out grinding.Because these anchor clamps adopt two jaw self-centering structures, so to the drill bit of grinding different-diameter, the processing of cotter mill cutter or slotting cutter is very convenient.Clamp jaw is shorter from the distance of grinding face, so rigidity is good, adds and be difficult for to produce vibration man-hour, can improve grinding fineness, and can the maintenance center constant all the time, symmetry be good, the cutting edge of workpiece anterior angle symmetry and can not departing from.Retained part is simple in structure, and is easy to make.Collet body is changed into the cutting edge of slotting cutters such as can also processing the grinding taper shank is thick, serration behind the bellmouth.Equation graduation is easy to use for the operative employee, and fast, the selection of index dial can be determined according to the cutting edge number of cutlery, can process two, three, four ... the cutting edge grinding of five equilibrium arbitrarily no longer needs to carry out five equilibrium with range estimation.Grinding angle is regulated part by adjusting 01,02,03,04 respectively, and 05 or 06 can process cutting edge roundness at any angle.Wherein adjust 04 and can swing grinding, adjustment 06 can be processed the drift angle of cutting edge, adjusts 04,05 or 06 grinding that can process chisel edge.These anchor clamps can be installed in cutter and tool grinding machine, process the sharpening fluted drill on cylindrical grinder or the special purpose machine tool, straight shank drill, taper shank drill, cotter mill cutter, cutting edges such as the drift angle of slotting cutter etc., relief angle and chisel edge.

Claims

1, drill bit, milling cutter edge grinding anchor clamps, it is mounted in the cutting edge of processing sharpening drill bit, cotter mill cutter, slotting cutter on the lathe, it is characterized in that anchor clamps by retained part, the calibration part, targeting part and grinding angle adjusting portion are grouped into.

2, drill bit according to claim 1, the milling cutter edge grinding anchor clamps is characterized in that retained part is made up of collet body, gripping sleeve, clamp jaw and tapered cup nut, and clamp jaw is by the axial symmetry setting, and the quantity of clamp jaw is established 2 or 3 according to the cutting edge number of processing work.

3, drill bit according to claim 1, the milling cutter edge grinding anchor clamps is characterized in that the calibration part by connecting plate, index dial, the calibration retainer spring, calibration alignment pin, calibration push-piece, trip bolt, Screw is formed, and index dial is bisection or the trisection or the quartering, or more than the quartering.

4, drill bit according to claim 1, the milling cutter edge grinding anchor clamps, it is characterized in that grinding angle regulate part by turn to body, angle square to turn to body, wave axle, wave shaft coupling, wave axle bolt, turn to body bushing, Fixture for sharpening base, connecting plate lining, collet body, clench nail form 01 respectively, 02,03,04,05,06 combination, adjust 01,02,03,04,05 or 06 can process sharpening cutting edge at any angle.