CN2458120Y

CN2458120Y - Inner conical surface drill edge grinder

Info

Publication number: CN2458120Y
Application number: CN 00226971
Authority: CN
Inventors: 王忠魁; 何宁; 刘忠仁; 戴俊平; 燕小慧; 黎汉杰; 刘玉周
Original assignee: Shaanxi Polytechnic Institute
Current assignee: Shaanxi Polytechnic Institute
Priority date: 2000-11-01
Filing date: 2000-11-01
Publication date: 2001-11-07
Anticipated expiration: 2010-11-01

Abstract

The utility model relates to an inner conical surface drill bit edge grinder, which changes the grinding wheel of the edge grinder into an inner conical surface grinding wheel, three stepping motors of the edge grinder, namely a vertical stepping motor 3, a rotary stepping motor 13 and a horizontal stepping motor 21 are externally connected with a singlechip, and the singlechip controls the operation of the three stepping motors according to five edge grinding parameters, namely, a half cone angle delta, an axial angle theta, a deviation distance e, a cone top distance A and a drill bit rotation angle beta. The utility model has the advantages that twist drill of its sharpening, its relief angle, chisel edge oblique angle precision are high to be fit for many varieties, small batch, change frequent drill bit sharpening, the sharpening is efficient.

Description

Inner cone grinding of twist drills

The utility model relates to a kind of Sharpening device of cutter, and what be specifically related to is a kind of blade milling machine of fluted drill cutter.

Fluted drill is a kind of aperture knife tool of use amount maximum, and it is mainly used in boring, also can be used to reaming, thereby the workload of fluted drill sharpening is very big.Fluted drill is with two kinds of grinding methods are arranged after blunt at present: the one, and hand grinding promptly carries out sharpening to drill bit on general abrasive machine, and its shortcoming is: 1. grinding quality is low; 2. the own high material consumption of drill bit.Another kind method is a male cone (strobilus masculinus) machinery sharpening method, promptly carries out sharpening with special drill sharpening lathe.The sharpening bit part of this cutter grinding machine is swing anchor clamps of realizing imaginary cone, the workman earlier rule of thumb, anchor clamps are adjusted to a certain position, try mill, use apparatus measures (only measuring the relief angle of drill bit main cutting edge outer rim point) then, measure undesirable, readjust anchor clamps, examination mill, measurement again, qualified up to measuring, illustrate that just anchor clamps adjust to the right place, can large quantities ofly carry out sharpening this moment.This method shortcoming is: 1. this swing anchor clamps adjustment bothers; 2. only be fit to few specification, drill sharpening in enormous quantities, be not suitable for many specifications, small lot and change frequent drill sharpening; 3. the chisel edge oblique angle can not strictly be protected; 4. the tail amount of sticking up of knife face can not strict guarantee behind the drill bit.

Task of the present utility model is to adopt the inner conical surface grinding technology, designs a kind of inner cone grinding of twist drills, utilizes single-chip microcomputer according to three stepper motors of grinding parameter control of optimizing, and drill bit is carried out intellectuality processing.It can carry out accurate sharpening fast to the fluted drill of plurality of specifications.

The technical scheme of finishing above-mentioned task is that the emery wheel with blade milling machine changes into an inner conical surface emery wheel, three stepper motors of blade milling machine are vertical stepper motor 3, rotating stepper motor 13 and horizontal stepper motor 21 external single-chip microcomputers, and single-chip microcomputer is according to five grinding parameters: 1. semi-cone angle δ; 2. interaxial angle θ; 3. offset distance e; 4. the vertex of a cone is controlled the running of three stepper motors apart from A and drill bit anglec of rotation β.

Advantage of the present utility model is as follows:

(1) fluted drill of its sharpening, its relief angle, chisel edge angle precision height (grinding quality height);

(2) the tail amount of sticking up of knife face can strict guarantee (grinding quality height) behind the drill bit

(3) be fit to many kinds, small lot, the frequent drill sharpening of variation, and the sharpening efficiency height;

(4) this body is long-pending little, in light weight, simple in structure, ratio of performance to price height.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is a plan structure schematic diagram of the present utility model;

Fig. 3 is the schematic diagram that concerns of inner conical surface emery wheel of the present utility model and workpiece;

Fig. 4 is the schematic diagram that concerns of the emery wheel of male cone (strobilus masculinus) sharpening method and workpiece;

Fig. 5 is the spatial relationship figure of drill bit and the straight taper seat of grinding;

As depicted in figs. 1 and 2, inner cone grinding of twist drills described in the utility model is made up of control panel 1, base 2, vertical stepper motor 3, vertical dovetail pair 4, down-feed screw pair of nut 5, main motor 7, inner conical surface emery wheel 8, four paws self-centering chuck 10, main shaft 11, main spindle box 12, rotating stepper motor 13, feed dovetail pair 14, feed screw pair 15, feed dovetail handle 16, revolute 17, horizontal dovetail pair 18, horizontal screw lead pair of nut 19, horizontal dovetail handle 20, horizontal stepper motor 21 etc.Main motor 7 is in the upper end of support 6, and support 6 is fixed on the slip dovetail of vertical dovetail pair, and inner conical surface emery wheel 8 is connected on the axle of main motor 7 by the emery wheel joint, and the drill bit 9 of sharpening is installed on the four paws self-centering chuck 10.Three above-mentioned stepper motors are connected with a single-chip microcomputer, and single-chip microcomputer is according to the i.e. 1. semi-cone angle δ of the grinding parameter of five optimizations; 2. interaxial angle θ; 3. offset distance e; 4. the vertex of a cone is controlled the running of three stepper motors apart from A and drill bit anglec of rotation β, thereby realizes the intellectuality to drill sharpening.

As shown in Figure 4, what this was that at present some cutter manufacturers adopt fluted drill machinery sharpening is male cone (strobilus masculinus) sharpening method, and the used sharpening cone of this method is an imaginary cone.It has four grinding parameters: 1. semi-cone angle δ; 2. interaxial angle θ; 3. offset distance e; 4. the vertex of a cone is apart from A, and the spatial relationship of its drill bit and straight taper seat is shown in Fig. 5 (a).When according to Fig. 4 and Fig. 5 (a) fluted drill being carried out sharpening, if grinding parameter is selected improperly, the phenomenon that knife face is upturned behind the drill bit usually can occur, we call " sticking up tail " to this phenomenon.

As shown in Figure 3, this is the inner conical surface sharpening method that inner cone grinding of twist drills described in the utility model adopts, and the imaginary cone that is about to represent with double dot dash line among Fig. 4 changes an out and out inner conical surface into.And on the basis of four grinding parameters of former male cone (strobilus masculinus), increased a drill bit anglec of rotation β parameter, promptly allowed drill bit 9 on the basis of Fig. 5 (a), the axis around oneself is rotated counterclockwise a β angle again, at this moment, the spatial relationship of drill bit and straight taper seat is shown in Fig. 5 (b).This angle that increases newly can reduce and overcome " sticking up tail " phenomenon that the afterbody of knife face is upturned behind the drill bit effectively.

The operation principle of inner cone grinding of twist drills:

In five grinding parameters, semi-cone angle δ and axial angle θ are respectively constants, and be all the same to all drill bits of sharpening, and other three grinding parameters are different and different with bit diameter.For the drill bit of each given diameter, these five grinding parameters all on calculating machine optimize.Wherein optimizing the axis of grinding parameter offset distance e by vertical stepper motor 3 control inner conical surface emery wheels 8 moves up and down and guarantees; Optimizing grinding parameter drill bit anglec of rotation β guarantees by stepper motor 13; Optimizing the grinding parameter vertex of a cone guarantees by horizontal stepper motor 21 apart from A.When this blade milling machine made five grinding parameters all reach optimal value automatically, four object functions behind the sharpening (relief angle α, chisel edge angle ψ, drift angle 2 φ, tail clearance angle WXJ) reached our needed value naturally.

Three stepper motor single-chip microcomputer Based Intelligent Control:

All drill bits from φ 4～φ 35mm in the national standard all are optimized on computers, then, the final optimization pass grinding parameter value of each diameter drill bit is stored in the chip of single-chip microcomputer, during work, as long as input needs the bit diameter of sharpening on the control panel of this machine, the grinding parameter vertex of a cone that horizontal stepper motor 21 at first guarantees to optimize is apart from A; Then, vertical stepper motor 3 guarantees the grinding parameter offset distance e of optimization, and is last, and at this moment the grinding parameter drill bit anglec of rotation β that rotating stepper motor 13 assurances are optimized carries out sharpening to this drill bit, and four object functions behind the sharpening are exactly the value that we need naturally.

Claims

1. inner cone grinding of twist drills, it is by control panel 1, base 2, vertical stepper motor 3, vertical dovetail pair 4, down-feed screw pair of nut 5, main motor 7, emery wheel 8, four paws self-centering chuck 10, main shaft 11, main spindle box 12, rotating stepper motor 13, feed dovetail pair 14, feed screw pair 15, feed dovetail handle 16, revolute 17, horizontal dovetail pair 18, horizontal screw lead pair of nut 19, horizontal dovetail handle 20, horizontal stepper motor 21 compositions such as grade, it is characterized in that: emery wheel 8 is inner conical surface emery wheels, main motor 7 is in the upper end of support 6, support 6 is fixed on the slip dovetail of vertical dovetail pair 4, inner conical surface emery wheel 8 is connected on the axle of main motor 7 by the emery wheel joint

Three above-mentioned stepper motors are vertical stepper motor 3, rotating stepper motor 13 and horizontal stepper motor 21 and one according to the i.e. 1. semi-cone angle δ of the grinding parameter of five optimizations; 2. interaxial angle θ; 3. offset distance e; 4. the vertex of a cone is controlled the single-chip microcomputer electrical connection of three stepper motor runnings apart from A and drill bit anglec of rotation β.