CN2421112Y

CN2421112Y - Clamp for sharpening drilling bit

Info

Publication number: CN2421112Y
Application number: CN 00223003
Authority: CN
Inventors: 胡松
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University; Xian Jiaotong University
Priority date: 2000-05-12
Filing date: 2000-05-12
Publication date: 2001-02-28
Anticipated expiration: 2010-05-12

Abstract

The utility model provides a drill head sharpening clamping device, which is composed of a support bracket, a hanger rod, a chassis, a rotary table, a mopping plate, a fixed sleeve, a graduation sleeve, a drill head clamping sleeve, etc. The drill head is positioned by a conical surface of an end handle, a front angle can be adjusted by the rotary table, a back angle can be adjusted by the rotary hanger rod, and grinding amount can be adjusted via the motion of the mopping plate and the rotary of the drill head clamping sleeve. The sharpening amount of a third inclined plane can be adjusted via the lateral motion of a work table, and the utility model can be used for sharpening 'three tilt angle' drill heads with high efficiency.

Description

The drill sharpening anchor clamps

The invention belongs to the tool sharpening technical field in the machining.

In the machined industry, fluted drill is a kind of use hole machining tool very widely, but because its complex structure, sharpening is very difficult, the irrationality of cutting tip geometric parameter and bad machining condition in addition, often limiting it can only be as a kind of roughing tool, and durability is very low.Since the fifties, increasingly extensive along with computer application, Study on Mathematic Model is also day by day ripe, and the structural parameters of drill bit constantly are improved simultaneously, and new brill type constantly occurs." three inclination angles " drill bit is the brill type of French RJ Reynolds Tobacco Holdings ,Inc. invention, also has some documents to be referred to as three plane drill bits, and English is referred to as " six-facetdrill ".Compare with the standard fluted drill, " three inclination angles " drill bit drilling drag has reduced by 25～50%, and the life-span has been improved 2～3 times, and the drilling amount of feeding has improved 1～2 times, drilling quality is improved, and improved drilling efficiency.But " three inclination angles " drill bit needs special cutter grinding machine to carry out sharpening, and this has just limited its extensive use.At present, the domestic unit that does not still have this lathe of production; Though production (as the AVYAC drill point grinder manufacturing company of France) is arranged abroad, mostly be the Digit Control Machine Tool of multi-coordinate interlock, the price comparison costliness not too is fit to China's actual conditions.In addition, in the sharpening field of drill bit, the development of the mechanical sharpening equipment of Ni Zhifu drill is very active always in Chinese machine-building circle, but still not overripened up to now, also not too is suitable for using aborning.

In view of the complexity of the expensive expense of " three inclination angles " drill sharpening lathe and Ni Zhifu drill machinery grinding parameter, sharpening is simple and its good cost performance is showed in exploitation " three inclination angles " drill sharpening equipment that cutting ability is good especially.

The object of the present invention is to provide a kind of " three inclination angles " drill sharpening anchor clamps, can be assemblied on the general cutter and tool grinding machine, therefore reduced manufacturing cost, and the structure of " three inclination angles " drill bit itself has determined it than the good much better sharpening performance of Ni Zhifu drill, grinding parameter is stable, regulate easily, can greatly make things convenient for workman's operation.

Purpose of the present invention can realize by following technical scheme, these anchor clamps by be installed in support on the Grinder bench, around the suspension rod of this carriage center hole rotation, with the chassis of suspension rod spiral marking connection, around the rotating disk of this chassis rotation and be installed in planker, fixed muffle on the rotating disk, parts such as knife bar, index sleeve, drill jig holding sleeve and mandrel are formed.All parts that are installed on the chassis rotate around support rotary hole axis by suspension rod; All parts that are installed on the rotating disk rotate relative to the chassis by the mandrel axis; And the axis of support rotary hole and the axis that rotates the heart all be positioned at the vertical plane to knife bar, and overlap with the end face of abrasive grinding wheel.And the apex point of the axes intersect of mandrel axis and support rotary hole drill bit when tool setting.The assisted machining sword that grinding is come out passes through apex point just, and is positioned on the radius of drill bit.A torsionspring has been installed between support and the suspension rod in relative rotation, has been used for part on the balance suspension rod because the flywheel moment that deadweight produces.A spring holder has been installed between index sleeve and the drill jig holding sleeve, and sharpening is over and just can carries out the sharpening of another lobe behind the lobe cutting edge very soon like this, and symmetry is good.A knurled nut has been installed on the drill jig holding sleeve, and its end face is close to index sleeve, can make like this drill jig holding sleeve axially by the front end face location of fixed muffle, for the clamping of index sleeve and fixed muffle booster action is also arranged.With suspension rod Cross section Design camber, be the interference of suspension rod and grinding carriage during knife face behind sharpening.The chassis being designed to semicircular, then is that to regulate sharp angle easy in order to rotate rotating disk.

Compact conformation of the present invention, clamping is easy, adjusting is flexible, reliable clamping, accurate positioning.Utilize the present invention, general workman just can finish the sharpening or the problem of refacing of " three inclination angles " drill bit accurately with a few minutes.Improved the efficient of machining widely.Unit or the workshop big for the hole processing capacity especially seem practical.Compared with prior art, manufacturing cost of the present invention is lower, and grinding parameter is stable, and is also low to workman's industrial grade requirement.

The present invention is further illustrated below in conjunction with drawings and Examples:

Fig. 1 is the basic geometry figure of " three inclination angles " drill bit

The side view of Fig. 2 drill sharpening anchor clamps.

The front view of Fig. 3 drill sharpening anchor clamps

The vertical view of Fig. 4 drill sharpening anchor clamps

Inclined-plane 1 has provided the primary clearance of main cutting edge, and inclined-plane 2 intersects assisted machining sword of formation with inclined-plane 1, just in time by the axle center, is positioned on the radius of drill bit.Chisel edge is radially cut on inclined-plane 3, makes the chisel edge attenuation, and forms little top by drill axis just, not only has shear action but also has self-centering action.

Anchor clamps rely on support 21 to be fixed on the workbench of cutter and tool grinding machine, utilize the grinding points position of adjusting emery wheel that vertically moves of the laterally mobile and anchor clamps of workbench.Drill bit is installed on the drill jig holding sleeve 20 with caudal peduncle conical surface location, and this sleeve carries out axial location by fixed muffle 5.An index sleeve 17 also has been installed between fixed muffle 5 and the drill jig holding sleeve 20, be beneficial to the symmetrical grinding of another lobe cutting edge, index sleeve 17 usefulness trip bolts 13 are tightened, for the ease of operating and play the auxiliary effect that clamps, an alignment pin handle 18 and knurled nut 19 have been installed also between drill jig holding sleeve 20 and the index sleeve 17.All these parts that are installed in fixed muffle 5 are installed on the rotating disk 7 by planker 6, and rotating disk 7 and chassis 1 relatively rotate by mandrel 22, knife bar 8 are installed on the axis of cone of mandrel 22.Be installed in The One On The Chassis all parts by the rotary hole rotation of suspension rod 14 around support 21.A torsionspring 15 has been installed between suspension rod 14 and the support 21, and handle 11 provides this rotary manipulation, and alignment pin 16 positions, and set lever 9 and clamp nut 10 then clamp.The concrete operations of sharpening are as described below:

1. rotational lead screw handle 3 carries out tool setting, and purpose makes apex point be positioned at the lead that relatively rotates an axle center by support and suspension rod

In the vertical plane.

2. utilize handle 2 to drive rotating disk 7 and rotate, adjust the sharp angle of drill sharpening.

3. unclamp trip bolt 13, the knurled nut 19, rotate handwheel 4 tool settings, make cutting edge be positioned at horizontal level, once more

Clockwise rotate handwheel 4 and leading screw handle 3 and unite the sharpening amount of regulating, amount of spin must be according to recommendation.Lock fastening

Screw 13, knurled nut 19 and planker trip bolt 12.

4. utilize handle 11 to rotate the relief angle of suspension rod 14 and chassis 1 adjustment drill sharpening.With clamp nut and set lever

Clamp.

5. release handle 18 and knurled nut rotate 180 degree, lock again, carry out the sharpening of another lobe cutting edge.

6. utilize laterally moving of workbench, regulate the sharpening amount of carrying out inclined-plane 3.Repetitive operation 5 then, and sharpening is right

The title face.

Claims

1. drill sharpening anchor clamps, it comprises: be installed in support (21) on the Grinder bench, suspension rod (14), with chassis (1), the rotating disk (7) of suspension rod spiral marking connection and be installed in planker (6), fixed muffle (5), index sleeve (17) and drill jig holding sleeve (20) part of etc.ing on the rotating disk (7), it is characterized in that: be installed in all parts on the chassis (1) and can pass through suspension rod (14) and center on the rotation of support (21) rotary hole axis; Be installed in all parts on the rotating disk (7) can pass through mandrel (22) relative to the chassis (1) rotate; Between support (21) and the suspension rod (14) torsionspring (15) is arranged in relative rotation; Locate by a spring holder (18) between index sleeve (17) and the drill jig holding sleeve (20); A knurled nut (19) has been installed on the drill jig holding sleeve (20), and its end face is close to index sleeve (17), the axial front end face location with fixed muffle (5) of drill jig holding sleeve (20); The axis of support (21) rotary hole and the axis of mandrel (22) all are positioned at the vertical plane to knife bar (8), and overlap with the end face of abrasive grinding wheel; And the apex point of axes intersect drill bit when tool setting of the axis of mandrel (22) and support (21) rotary hole.

2. according to right 1 described drill sharpening anchor clamps, it is characterized in that: the cross section of suspension rod (14) is an arc; Chassis (1) is semicircular.