CN2920492Y

CN2920492Y - Structure of drill

Info

Publication number: CN2920492Y
Application number: CN 200620122153
Authority: CN
Inventors: 朱爱治
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-04
Filing date: 2006-07-04
Publication date: 2007-07-11
Anticipated expiration: 2016-07-04

Abstract

The utility model relates to a structure of drill, in particular to a structure composed of a drill body on the cylindrical end and a clamping part on the other end; Wherein, the drill body is provided with at least one pair of spiral groove and escaping gap, while the drilling and cutting part of the drill bit is a pair of blades extending from the edge of the top end; the extending part of the blade is connected with the escaping gap; the side edge of the escaping gap forms a blade belt with a predicted width; Wherein, the width of the blade belt gradually shrinks with a predicted width from the drilling and cutting part to the clamping part, or the shrinking width is zero, making the width of the front part of the blade belt larger than that of the rear part of the blade belt. Therefore, when the drill bit is cutting the work pieces, the device can improve such performances as the endured resistance, friction, contact area, service life and so on.

Description

The structure of drill bit

Technical field

The utility model relates to a kind of structure of drill bit, refers to a kind of design of being carried out on the land of drill bit especially, improving drill bit when digging into workpiece, the resistance that it bore, frictional force, contact area, and service life etc. performance.

Background technology

Along with communication product, consumption electronic products move towards Portable, lightening development, and march toward the growth stage, make no matter be machinery industry or its technology to each other of electronics industry, reached inseparable from stage, for example, general tellite (Printed Circuit Board, be called for short PCB) be the indispensable material of electronics industry, and a kind of drilling tool, for example: drill bit, then be often to use and not strange drilling tool on the mechanical industry, drill bit be a kind of can be on metal parts fast and be easy to generate the instrument in hole, it can be used for high-accuracy boring, for example: and the boring on the tellite (PCB), and it is long owing to the life-span, high penetration and extensively being favored; If say the prosperous closely bound up reality of drill bit industry and tellite (PCB) industry be not.

In addition, because high-accuracy, lightening, Portable development that computer, communication and consumption electronic products move towards, and then cause tellite (PCB) and move towards multilayer, high density, and pliability development, and the tellite of high density fine rule, aperture, slim sandwich construction (PCB) then is the inexorable trend of present production development; Because the rising of soft board and crystal covered carrier-board demand relatively promotes tellite (PCB) the drill bit demand less to the aperture, also promotes the quality and quantity in solid drill demand market virtually.

So drill bit is a necessary consumptive material in tellite (PCB) production process, and along with the prosperous lasting hot network of tellite (PCB) industry, the also related prosperous market that draw high consumptive materials such as drill bit; Yet the electronics dealer progressively prolongs or changes the life cycle of its consumptive material for saving cost, especially with the drill bit of maximum consumptive material in its processing procedure for very, therefore, the electronics dealer is fully loaded and avoid influencing the product yield for reaching production capacity, the normal replacement and the life-span of drill bit consumptive material, particular importance promptly seems.

But, because existing drill bit bad in the land design often caused when digging into workpiece, forming very big resistance, relative friction forces is bigger, and contact area is big, and then causes shorten the service life of drill bit.

So, designer of the present utility model is perceiving existing drill configurations weak point, and on fast changing market, have the product that constantly creates uniqueness and tool innovation effect only, be only manufacturer's key to win, so, how on market with keen competition, to show one's talent, to promote the competitive strength of dealer in this series products, be the purpose of this utility model.

Summary of the invention

Main purpose of the present utility model is to overcome the deficiencies in the prior art and defective, effectively solve existing drill bit bad in the land design, every shortcomings such as the bit life shortening that is caused, provide a kind of when digging into workpiece simultaneously, it is little to have a resistance, and frictional force is little, contact area is little, increase by percent 50 drill configurations service life, meet the environmental protection notion to reach, and promote its competitiveness on market.

Secondary objective of the present utility model is that the brill footpath that limits drill bit further is smaller or equal to 0.3 millimeter (mm), and the land length of drill bit then between 0.2 millimeter (mm)～7.0 millimeter (mm), can obtain preferable and stable feeding.

For reaching above-mentioned purpose, the utility model provides a kind of structure of drill bit, formed by the brill body of one end and the clamping part of the other end, wherein boring body provides the helical groove of at least one pair of and escapes the crack, and a pair of at least blade extends by its most advanced and sophisticated crest line in the drilling portion of drill bit, and the blade extending part with escape the crack and join, and escape the lateral margin in crack, be formed with the land of a preset width, it is characterized in that, the width of this land is prolonging direction convergent one preset width of clamping part from drilling portion, or to be tapered to width be zero, is wide with the width that forms the land leading portion than the width of land back segment.

Description of drawings

Fig. 1 is a schematic appearance of the present utility model;

Fig. 2 is the A-A generalized section of Fig. 1;

Fig. 3 is the B-B generalized section of Fig. 1;

Fig. 4 is the C-C generalized section of Fig. 1.

Symbol description among the figure

1 drill bit

11 bore body 13 drilling portions

111 escape crack 131 blades

112 helical grooves, 14 lands

12 clamping parts

The specific embodiment

For technological means of the present utility model and operation are had further understanding and understanding, now, be described in detail as follows for the embodiment conjunction with figs..

The utility model is a kind of structure of drill bit, see also shown in Figure 1, a preferred embodiment of the present utility model, drill bit 1 mainly is made up of the brill body 11 of column type one end and the clamping part 12 of the other end, wherein, clamping part 12 provides the chuck of boring bar tool fixing usefulness, and boring body 11 then provides the helical groove 112 of at least one pair of and escape crack 111; Again, it is conical that the drilling portion 13 of drill bit 1 is, and extends a pair of at least blade 131 by its most advanced and sophisticated crest line, and blade 131 extending parts with escape crack 111 and join, and escape the lateral margin in crack 111, promptly be formed with the land 14 of a preset width.

By above-mentioned composition member, be able to implement technical characterictic of the present utility model as follows:

See also again shown in Fig. 1,2,3 and 4, be the A-A generalized section of schematic appearance of the present utility model, Fig. 1, the B-B generalized section of Fig. 1, the C-C generalized section of Fig. 1, wherein, the width of land 14 is prolonging direction convergent one preset width of clamping part 12 from drilling portion 13, or to be tapered to width be zero, the width that forms land 14 leading portions can be by width as shown in Figure 2, the width that becomes than land 14 back segments is wide, width as shown in Figure 3, or land 14 width that become as shown in Figure 4 are zero; And best land 14 length of a preset width of this convergent are between 0.2 millimeter (mm)～7.0 millimeter (mm), and the brill footpath that cooperates drill bit 1 again can obtain preferable and stable feeding during smaller or equal to 0.3 millimeter (mm).

Can know thus and learn, the utility model with the width of land 14 by existing consistent width, be designed to prolonging direction convergent one preset width (length is between 0.2 millimeter (mm)～7.0 millimeter (mm)) of clamping part 12 by drilling portion 13, because drill bit 1 is when the drilling workpiece, main by drilling portion 13, blade 131 and land 14 leading portions carry out the operation of drilling, land 14 back segment position deals are then compared leading portion for light, so the utility model is prolonging the width of land 14 direction convergent one preset width of clamping part 12 from drilling portion 13, or to be tapered to width be zero, main beyond the normal operation that does not influence drilling, the detritus that still can make workpiece successfully is expelled to beyond the surface of the work via boring the helical groove 112 on the body 11 and escaping crack 111, and then improve drill bit 1 effectively when digging into workpiece, because of the width of land 14 front and back sections all consistent, and then the resistance that causes it to bear, frictional force, contact area, and performance such as life-span is relatively influenced.

In sum, we are appreciated that, prolonging direction convergent one preset width of clamping part 12 from drilling portion 13 by the width of the utility model land 14, or to be tapered to width be zero, can make that its resistance reduces relatively, frictional force reduces because of the taper in width of land 14 back segments, and make can increase by percent five ten the service life of drill bit 1 simultaneously, have to reach and meet the environmental protection notion, and promote its advantage and practical value such as competitiveness on market.

The above, only be a specific embodiment of the utility model the best, but skill feature of the present utility model is not limited thereto, all those skilled in the art are in the utility model field, can think easily and variation or modification, should all covered in the scope of claims.

Claims

1. the structure of a drill bit, formed by the brill body of one end and the clamping part of the other end, wherein boring body provides the helical groove of at least one pair of and escapes the crack, and a pair of at least blade extends by its most advanced and sophisticated crest line in the drilling portion of drill bit, and the blade extending part with escape the crack and join, and escape the lateral margin in crack, and be formed with the land of a preset width, it is characterized in that:

The width of this land is prolonging direction convergent one preset width of clamping part from drilling portion, or to be tapered to width be zero, is wide with the width that forms the land leading portion than the width of land back segment.

2. the structure of drill bit as claimed in claim 1 is characterized in that, a predetermined length of this land convergent, and promptly the length of land is between 0.2 millimeter～7.0 millimeters.

3. the structure of drill bit as claimed in claim 1 is characterized in that, the brill footpath of this drill bit is smaller or equal to 0.3 millimeter.