CN202180242U

CN202180242U - Improved junk slot structure of drill bit

Info

Publication number: CN202180242U
Application number: CN201120143866XU
Authority: CN
Inventors: 陈招阳; 罗兆钧; 曾士哲
Original assignee: TOP POINT TECHNOLOGY Co Ltd
Priority date: 2011-05-06
Filing date: 2011-05-06
Publication date: 2012-04-04
Anticipated expiration: 2021-05-06

Abstract

The utility model relates to an improved junk slot structure of a drill bit, wherein the drill bit comprises a drill body part and a drill slot part, wherein two opposite cutting edges are arranged at one end, which away from the drill body part, of the drill slot part; gaps are concavely arranged at the peripheries of the two opposite cutting edges respectively; and two junk slots with different spiral angles are arranged along the sides of the two cutting edges respectively towards the direction of the drill body part and are arranged on the drill slot part in a surrounding way, so that the two junk slots with different spiral angles can spiral in a crossed manner but not in a paralleled manner with equal or unequal length in the drill slot part, thereby generating a junk slot with a large width, reinforcing the center thickness of the drill bit in the junk slots, achieving the purpose of guiding junks generated by cutting to be removed outside along the junk slots fast, preventing the junk accumulation in the junk slots from affecting the structural strength and reducing the situation of drill bit cracking.

Description

The flute of drill structure of improvement

Technical field

The utility model relates to a kind of chip area structure of drill bit; Especially the chip area structure that refers to quick chip removal when auxiliary drill bit carries out cutting operation; The drill flute portion that utilizes drill bit is in two cutting blade two sides; The chip area that is two different spiral angles respectively makes two chip areas be not parallel but crossing, and has good chip removal effect.

Background technology

In the various mechanical type operations, except procedures such as basic turner, pincers worker, planing, miller, welder, when making finished product; Also use the processing mode of boring through regular meeting, no matter and be the enforcement of that a kind of operations, all need utilize process tool to carry out operation; Employed drill bit when boring, the process tool that the most often is employed in the general machining, and the cutter head of drill bit part must possess set angle, size and edge length; For carrying out bore operation smoothly, then drill bit is being holed, in the working angles, must the scrap of cutting discharged outside the hole; Prevent that drill bit from producing the phenomenon that the scrap blocking can't be holed in bore operation, and supply bore operation smooth and easyly to carry out, the right drill bit that supplies bore operation to use at present; All be two blades, the two edge drill bit shafts of drill bit to, mode is curled up and is provided with chip area in the shape of a spiral, the scrap that two blades are cut discharges along two limit chip areas; But consider the spiral angle of bit size and two chip areas; So two chip areas on drill bit all only are less width conduits, also influence the smooth degree of drill bit when chip removal, and in actual bore operation process; But there are inconvenience and puzzlement, as:

(1) two chip areas on the drill bit so width of chip space is restricted, only have width smaller because of presenting the alternating expression spiral surrounding; Also cause chip area when carrying out chip removal; Stopped up or blocking by scrap easily, influence chip removal and have some setbacks, and cause the drill bit fracture easily.

(2) diameter of drill bit must be equipped with screw type two chip areas; With causing the thick significantly reduction of the inner drill bit heart of two chip areas; Also cause drill bit structure intensity variation, so that drill bit is when carrying out the drilling operation, the resistance that forms during easily because of drilling causes the drill bit fracture.

Therefore; How to solve existing drill bit and influence structural strength and the bad problem of chip removal easily because of the mode of chip area setting; And two adjacent interlaced helical of chip area around; Cause disappearances such as the thick reduction of the drill bit heart, structural strength variation, be the utility model designer and the relevant manufacturer that is engaged in the industry, the direction place that the research of desiring most ardently improves.

Summary of the invention

To the deficiency of prior art, the purpose of the utility model is: a kind of flute of drill structure of improvement is provided, improves drill bit chip removal situation, make its smooth and easy chip removal be difficult for blocking, and strengthen the structural strength of drill bit.

For realizing above-mentioned purpose, the technical scheme that the utility model adopts is:

A kind of flute of drill structure of improvement comprises drill body part, by the drill flute portion that drill body part one side extends, and this drill flute portion one end has two relative cutting blades, it is characterized in that:

This drill flute portion is provided with the chip area of different spiral angles at two cutting blade sides towards drill body part, and these two different spiral angle chip areas are not parallel and crossing setting in drill flute portion.

Wherein: this drill bit is a microbit, and the diameter of this microbit is between 0.05mm～0.80mm.

Wherein: the spiral angle difference of these two different spiral angle chip areas is between 2 °～55 °.

Wherein: the chip area of these two different spiral angles is to equate or unequal length.

Wherein: these two chip areas are second chip area and first chip areas that are equal or unequal length, and this first chip area length is 20%～100% of this second chip area length.

Wherein: two cutting blades of the drill flute portion of this drill bit are concaved with the gap respectively or are not provided with the gap at lateral border.

Wherein: two cutting blades of the drill flute portion of this drill bit, be concaved with the gap respectively at lateral border, then the depth dimensions of each clearance recess is 1%～40% of a bit diameter.

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be:

The utility model has extended drill flute portion at this drill bit by drill body part one side; And drill flute portion has two relative cutting blades in an end; The lateral border of two cutting blades is concaved with the gap respectively, again along two cutting blade sides, is provided with the chip area of two different spiral angles respectively towards the drill body part direction; And the circulating type setting that the chip area of two different spiral angles is in drill flute portion; Then can supply two different spiral angles chip area, be and equate or unequal length curls up in drill flute portion and produces not parallel but crossing mode, to produce the chip area of big width, the purpose that the scrap when reaching the guiding drilling discharges along chip area fast; And can supply chip area to avoid producing the Integrated Chip phenomenon, reduce the drill bit crack conditions.

The utility model is at the chip area of this drill bit in two set different spiral angles of drill flute portion; Can be configured as two equates or first chip area, second chip area of unequal length; And supply the first chip area back segment to be communicated in second chip area, and and expand the width of chip area, increase the chip removal space, help the operation of quick chip removal; And increase the thick size of the drill bit heart, the lifting drill bit structure intensity of drill flute location, can reduce the drill bit phenomenon of rupture.

The utility model is provided with the chip area of two different spiral angles at this drill bit in drill flute portion helical ring, and two different spiral angles differ between about 2 °～55 °; And the first chip area length be about the second chip area length 20%～100% between.

Description of drawings

Fig. 1 is the stereo appearance figure of the utility model;

Fig. 2 is the side view of the utility model;

Fig. 3 is the front view of the utility model cutting blade direction.

Description of reference numerals: 1-drill bit; The 11-drill body part; The 15-chip area; 12-drill flute portion; 151-first chip area; The 13-cutting blade; 152-second chip area; The 14-gap.

The specific embodiment

For reaching above-mentioned purpose and effect, technological means that the utility model adopted and structure thereof are drawn now and are explained in detail that with regard to the preferred embodiment of the utility model its characteristic and function are following, understand in order to do profit fully.

Seeing also Fig. 1, Fig. 2, shown in Figure 3, is stereo appearance figure, the side view of the utility model, the front view of cutting blade direction, finds out that by knowing shown in the figure drill bit 1 of the utility model comprises drill body part 11, drill flute portion 12, wherein:

This drill bit 1 is in drill body part 11 1 sides; Extended drill flute portion 12 outwardly; And drill flute portion 12 is provided with the cutting blade 13 of two relative formulas at the end away from drill body part 11, and is concaved with gap 14 respectively in the lateral border of two cutting blades 13; And at two cutting blades 13, two sides in addition; Towards drill body part 11 directions, be provided with the chip area 15 of two different spiral angles along drill flute portion 12 helical rings respectively, then the chip area 15 of two different spiral angles also can be two and equates or unequal length is located on drill flute portion 12, and two chip areas 15 comprise first chip area 151, second chip area 152; First chip area 151, second chip area 152 are located on drill flute portion 12 for being different spiral angles again; Promptly supply first chip area 151, second chip area 152 in drill flute portion 12 places, be not parallel but crossing mode around, and then constitute the drill bit 1 of the utility model.

And the drill bit 1 of above-mentioned the utility model can be the drill bit 1 or microbit 1 isotype of general pattern; If use with microbit 1 mode, the diameter of this microbit 1 then is between 0.05mm～0.80mm.

Moreover two cutting blades 13 of the drill flute portion 12 of drill bit 1 can not be provided with gap 14 in lateral border, also can be concaved with gap 14 respectively, then the depth dimensions of each gap 14 depressions be about drill bit 1 diameter 1%～40% between.

Again; This drill bit 1 is provided with two chip areas 15 of two different spiral angles in drill flute portion 12; And two chip areas 15 form and equate or unequal length is surrounded on drill flute portion 12; Then two different spiral angles, for equating or first chip area 151, second chip area 152 of the chip area 15 of unequal length; Supply spiral angle between first chip area 151, second chip area 152 between 2 °～55 °, and supply the length of first chip area, 151 spiral surroundings, be about second chip area 152 20%～100% between; Then supply first chip area 151 in drill flute portion 12 spiral surroundings and connect, then can increase the width of chip area 15 and can promote the speed of chip removal in second chip area 152, and most of length distance in the drill flute portion 12; Only be provided with second chip area 152; Also can increase drill bit 1 diameter size, promote drill bit 1 whole with drill flute portion 12 structural strengths, can supply drill bit 1 when the drilling operation, through drill flute portion 12 two equate or the chip area 15 of different length, different spiral angles; Auxiliary quick chip removal; Reduce becomes clogged with dirt in the disappearance of chip area 15, reduce drill bit 1 phenomenon of rupture takes place when the drilling operation, and the hole quality Yi Gengjia of drilling.

Be with, the above is merely the preferred embodiment of the utility model, non-so the limitation the utility model claim; The drill bit 1 of the utility model is in drill flute portion 12 set two cutting blades 13, for be respectively equipped with the chip area 15 of different spiral angles in two sides, also form and equates or unequal length is surrounded on drill flute portion 12; And supply first chip area 151, second chip area 152 of two chip areas 15 to be not parallel but crossing pattern; Helical ring is located in the drill flute portion 12, and reaches through the purpose that two chip area 15 width increase, auxiliary drill bit 1 carries out quick chip removal, and the scrap in the time of can be with drilling discharges fast, prevents that scrap from accumulating, blocking in two chip areas 15; And through the 15 equal or unequal length settings of two chip areas; Increase the thick size of drill bit 1 heart, and promote drill bit 1 structural strength, reduce drill bit 1 function that crack conditions takes place when the drilling operation; Contained by the utility model so can reach structure, the device of aforementioned effect such as; Simple and easy modification of this kind and equivalent structure change, and all should in like manner be contained in the claim of the utility model, close and give Chen Ming.

The flute of drill structure of the improvement of above-mentioned the utility model when reality is used, for can having following advantage, as:

(1) drill bit 1 is provided with the chip area 15 of different spiral angles in drill flute portion 12; And two chip areas 15 can form two and equate or unequal length is looped around drill flute portion 12; Be not parallel but crossing mode and be provided with, can effectively increase chip area 15 width, auxiliary drill bit 1 is when carrying out the drilling operation; Chip removal is difficult for accumulating scrap or causes obstruction fast, reduces drill bit 1 crack conditions when the drilling operation.

(2) drill bit 1 is provided with two chip areas 15 in drill flute portion 12; Two chip areas 15 then comprise and equating or first chip area 151, second chip area 152 of different length; And supply first chip area 151 and the not parallel but crossing setting of second chip area 152,, can increase the thick size of drill bit 1 heart of drill flute portion 12 positions in drill flute portion 12 most of length tool second chip area 152 only; Increase drill flute portion 12 and drill bit 1 overall construction intensity, reduce drill bit 1 crack conditions when the drilling operation.

So; The utility model is the design that is primarily aimed at the chip area of drill bit, utilizes drill bit to be provided with the chip area of two different spiral angles in drill flute portion, and two chip areas can comprise that also two equate or first chip area, second chip area of unequal length; Be not parallel but crossing pattern setting in drill flute portion; And increase width of chip space, can assist drill bit to carry out quick chip removal is main key protection point, and first chip area is switched to second chip area at latter end, can increase the thick diameter of the drill bit heart of drill flute location; Be only make that drill bit whole promotes with drill flute portion structural strength, the drilling operation advantage of easy fracture not, can supply drill bit drilling effect also better.

More than explanation is just illustrative as far as the utility model; And nonrestrictive, those of ordinary skills understand, under the situation of spirit that does not break away from claim and limited and scope; Can make many modifications, variation or equivalence, but all will fall within the protection domain of the utility model.

Claims

1. the flute of drill structure of an improvement comprises drill body part, by the drill flute portion that drill body part one side extends, and this drill flute portion one end has two relative cutting blades, it is characterized in that:

2. the flute of drill structure of improvement according to claim 1, it is characterized in that: this drill bit is a microbit, the diameter of this microbit is between 0.05mm～0.80mm.

3. the flute of drill structure of improvement according to claim 1, it is characterized in that: the spiral angle difference of these two different spiral angle chip areas is between 2 °～55 °.

4. the flute of drill structure of improvement according to claim 1 is characterized in that: the chip area of these two different spiral angles is to equate or unequal length.

5. the flute of drill structure of improvement according to claim 4; It is characterized in that: these two chip areas are second chip area and first chip areas that are equal or unequal length, and this first chip area length is 20%～100% of this second chip area length.

6. the flute of drill structure of improvement according to claim 1, it is characterized in that: two cutting blades of the drill flute portion of this drill bit are concaved with the gap respectively or are not provided with the gap at lateral border.

7. the flute of drill structure of improvement according to claim 1 is characterized in that: two cutting blades of the drill flute portion of this drill bit, be concaved with the gap respectively at lateral border, and then the depth dimensions of each clearance recess is 1%～40% of a bit diameter.