CN2757979Y

CN2757979Y - Structure of cutting tool for multi screw angle

Info

Publication number: CN2757979Y
Application number: CN 200420122239
Authority: CN
Inventors: 郑黄铮
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-31
Filing date: 2004-12-31
Publication date: 2006-02-15
Anticipated expiration: 2014-12-31

Abstract

The utility model relates to a multiple screw angle cutting tool structure. The drilling tool mainly comprises a knife holder and a drill edge part, wherein spiral inclination angles are spirally arranged on the drill edge part by a drill tip, the drill edge part comprise a groove length composed of at least two spiral inclination angles, each of the spiral inclination angles is different, the angle arrangement between the front spiral inclination angle and the back spiral inclination angle displayed by a centerline of the drill edge part is decreased from bigness to smallness, and the area of the groove is added simultaneously. According to the multiple spiral angle structural design provided by the utility model, a drill core which is gradually thickened is arranged between the spiral inclination angles of the drill edge part and a web plate, the spiral inclination angles which are arranged on the drill edge part are from deep to shallow, and the area of the groove is added simultaneously. The cutting quantity is enough, and cutting powder can not be blocked in a hole diameter easily. Therefore, the thickness of the drill core of the drill edge part is gradually added, and the rigidity of the drilling tool is improved simultaneously. When drilling with higher rotational speed is carried out, the performance of the accuracy of the hole position is better, and the states of deviation and needle breakingcan not be seen easily.

Description

Multi-spiral Angle Cutting Tool Structure

Technical field

The utility model is a Multi-spiral Angle Cutting Tool Structure of specializing in the drilling aperture about a kind of, be meant especially by the variation of multistage inclination angle groove is provided, promoted the structural strength of cutting element, the Multi-spiral Angle Cutting Tool Structure of the preferable chip resistance of performance.

Background technology

General drilling tool be if will there be good drilling performance, and drill bit must in addition suitable grinding, wherein the correct grinding of drill point angle must look closely desire the material of drilling and decide, to obtain preferable drilling performance.

In addition, the quality of a drilling tool has the inclination angle design of the drill lip portion that concerns.As shown in Figures 1 and 2, it in the icon drilling cutters 10 of a known drawbore, handle of a knife 101 and drill lip portion 102 mainly have been distinguished into, it is long that this drill lip portion 102 has one section helical angle ditch, and differentiation has multistage inclination angle 103 to constitute, and the angle at each inclination angle 103 is impartial, cuts function because drilling cutters 10 its relative inclination angle 103 degree of depth of single spiral angle can only reach certain row; And higher to drilling hardness during with the sheet material that is difficult to cut, it bores power and must strengthen relatively, therefore for 10 of drilling cutters easily wearing and tearing or because of rigidity not enough and crooked even broken needle.

Therefore, habit has drilling cutters 10 to sheet material 3 ' enforcement drawbore position the time, because rigidity deficiency and solid capacity are few, when drill for high-speed, block the chip removal groove easily because of the bits material again, therefore to multi-disc sheet material 3 ' enforcement aperture drilling the time, stacked below sheet material 3 makes drilling aperture 4 ' generation be offset more situation easily because of the rigidity deficiency and the solid capacity of drilling cutters 10 are few easily, so the bad sheet material 3 that must be eliminated ' promote many relatively.

Summary of the invention

The utility model is only to have single drilling helix angle in view of known drilling cutters, therefore be subject to helix angle relation and rotating speed problem, so drilling cutters is crooked easily, broken needle and row thereof cut effect not clear (particularly under the more situation of lamination number), therefore the purpose of this utility model is the defective that overcomes above-mentioned prior art, it is studied improvement, and then provide a kind of many spiral angles cutting element, it changes by providing drill lip portion to have the multistage spiral angle, make the helix angle of drill lip portion to having the unbearable of progressive additive between the web, and the designed helix angle of drill lip portion is also shallow by being deep to, with leading portion and the angle setting between the back segment helix angle that center line was presented is to be successively decreased by gradually for a short time greatly, its groove area also promotes thereupon, so its row's amount of cutting foot is difficult for making the bits material to block in the chip removal groove; In addition, during for drilling, this drilling cutters with many spiral angles is during for boring, and the performance of its position, hole precision is also better.

Again, another purpose of the present utility model, the drilling cutters that provides a kind of chip resistance good promptly is provided, has many spiral angles structural design by ditch length by the drill lip portion of drilling cutters, and this helix angle (θ) reduces gradually, therefore relative chip removal cubical content also can increase, and avoids drilling process to block easily among the chip removal groove.

Below with regard to many spiral angles of the utility model cutting element (A) and habit the hole position precision comparison sheet of drilling cutters when reality is holed of single thread angle cutting tool (B) arranged:

Position, hole precision: F3.3-multi-angle--the 3rd back side
						A
	1	2	3	4	5	A
	1	2	3	4	5	3000 holes	1.310	0.997	1.231	1.311	1.556
2500 holes	1.269	1.056	1.349	1.551	1.692	3000 holes	1.310	0.997	1.231	1.311	1.556
2500 holes	1.269	1.056	1.349	1.551	1.692	2000 holes	1.273	1.077	1.371	1.578	1.662
1500 holes	1.408	1.129	1.376	1.559	1.645	2000 holes	1.273	1.077	1.371	1.578	1.662
1500 holes	1.408	1.129	1.376	1.559	1.645	1000 holes	1.693	1.208	1.448	1.555	1.960

Single angle--the 3rd back side of position, hole precision: F3.3-
						B	1	2	3	4	5
3000 holes	1.186	0.754	0.891	0.580	0.592	B	1	2	3	4	5
3000 holes	1.186	0.754	0.891	0.580	0.592	2500 holes	1.182	0.751	0.913	0.664	0.626
2000 holes	1.158	0.758	1.015	0.670	0.760	2500 holes	1.182	0.751	0.913	0.664	0.626
2000 holes	1.158	0.758	1.015	0.670	0.760	1500 holes	1.094	0.770	1.102	0.670	0.812
1000 holes	1.257	0.772	1.094	0.719	0.883	1500 holes	1.094	0.770	1.102	0.670	0.812

Position, hole precision: F3.9--multi-angle--the 3rd back side
						A
	1	2	3	4	5	A
	1	2	3	4	5	3000 holes	1.079	0.941	0.769	0.833	1.218
2500 holes	1.200	1.015	0.947	0.980	1.316	3000 holes	1.079	0.941	0.769	0.833	1.218
2500 holes	1.200	1.015	0.947	0.980	1.316	2000 holes	1.318	1.394	1.377	1.082	1.361
1500 holes	1.416	1.400	1.590	1.094	1.378	2000 holes	1.318	1.394	1.377	1.082	1.361
1500 holes	1.416	1.400	1.590	1.094	1.378	1000 holes	1.476	1.478	1.594	1.165	1.521

Single angle--the 3rd back side of position, hole precision: F3.9--
						B	1	2	3	4	5
3000 holes	1.088	0.809	0.642	0.517	0.673	B	1	2	3	4	5
3000 holes	1.088	0.809	0.642	0.517	0.673	2500 holes	1.125	0.823	0.716	0.596	0.735
2000 holes	1.128	0.908	0.861	0.628	0.738	2500 holes	1.125	0.823	0.716	0.596	0.735
2000 holes	1.128	0.908	0.861	0.628	0.738	1500 holes	1.162	0.983	0.854	0.651	0.764
1000 holes	1.355	1.141	1.073	0.789	0.923	1500 holes	1.162	0.983	0.854	0.651	0.764

Position, hole precision: F3.3--multi-angle--second back side
						A
	1	2	3	4	5	A
	1	2	3	4	5	3000 holes	2.500	1.760	2.189	2.366	2.390

Single angle--second back side of position, hole precision: F3.3--
						B	1	2	3	4	5
3000 holes	2.151	1.417	1.713	1.112	1.150	B	1	2	3	4	5

Position, hole precision: F3.9--multi-angle--second back side
						A
	1	2	3	4	5	A
	1	2	3	4	5	3000 holes	2.033	1.679	1.574	1.543	1.974

Single angle--second back side of position, hole precision: F3.9--
						B	1	2	3	4	5
3000 holes	2.097	1.619	1.199	0.903	1.306	B	1	2	3	4	5

The drilling enforcement table that is reached multi-disc sheet material by above position, two kinds of holes precision can demonstrate, and polygonal helicity cutting element of the present utility model (A) has the precision performance of position, better hole than existing cutting element (B) drill point really, and there is no the broken needle phenomenon.

For further being familiar with and understanding structure of the present utility model and effect thereof, it is as follows to be elaborated for the embodiment conjunction with figs. now, so that it is understood more.

Description of drawings

Shown in Figure 1 is known cutting element outward appearance floor map;

Shown in Figure 2 is that known cutting element is implemented the hole after the drilling of multi-disc sheet material to forming view;

Shown in Figure 3 is outward appearance floor map of the present utility model;

Shown in Figure 4 is another outward appearance floor map of the present utility model;

Shown in Figure 5 is that the utility model is implemented the hole after the drilling of the stacked sheet material of multi-disc to forming view.

Symbol description:

10 drilling cutters, 101 handle of a knifes, 102 drill lip portions, 103 inclination angles 1,1 ' drilling cutters 11,11 ' handle of a knife 12,12 ' drill lip portion 121,121 ' apex point end θ 1, θ 2, θ 3, θ 4, θ 5 helix angles 3,3 ' sheet material 4,4 ' drilling aperture

The specific embodiment

See also shown in Figure 3, cutting element among the figure is mainly a kind of many spiral angles drilling cutters 1, wherein drilling cutters 1 includes handle of a knife 11 and drill lip portion 12, these drill lip portion 12 front ends have includes the flute length that at least two sections helix angle θ 1 and θ 2 constitute drill lip portions 12, and each helix angle θ 1, θ 2 be by inclination angle angle difference, so unbearabling thickness is also obviously different; With center line, helix angle θ 1 to the angle setting between the helix angle θ 2 be by greatly gradually little, and the groove area also promotes thereupon, drill lip portion 12 by apex point end 121 to helix angle θ 1, θ 2 directions, its formed groove is to increase gradually, therefore its solid capacity foot is difficult for causing the broken needle situation because of the bits material blocks in the aperture relatively.

Moreover, because the degree of depth of the helix angle θ 1 of drill lip portion 12, θ 2 every section helix angle when car system is different with angle, therefore relative unbearabling thickness is also by apex point end 121 progressive additive backward, therefore also can promote its rigidity to this drilling cutters 1, guarantee to be difficult for broken needle in its drilling process, and rigidity lifting back also promotes many for the boring precision.

See also Fig. 4 and shown in Figure 5 again, drilling cutters 1 ' in the icon is the embodiment of another kind of many spiral angles cutting element, this drilling cutters 1 ' includes handle of a knife 11 ' and drill lip portion 12 ', this drill lip portion 12 ' front end has includes the flute length that at least three sections helix angle θ 3, θ 4 and θ 5 constitute drill lip portions 12 ', and each helix angle θ 3, θ 4 and θ 5 be because inclination angle angle difference, so unbearabling thickness is also obviously different with the helix angle groove width; Since the helix angle of drill lip portion 12 ' be by θ 3, θ 4 to θ 5 gradually angle reduce, therefore it holds the also lifting relatively of bits amount, can reduce and stopple and broken needle situation when improving the drilling aperture, and be beneficial to and promote the drilling precision, and during the sheet material 3 of drilling multilayer storehouse, the more situation of drilling aperture 4 skews that can avoid drilling cutters 1 ' rigidity deficiency to be produced, the defective products when reducing drilling simultaneously produces.

The above; it only is a preferred embodiment of the present utility model; be not in order to limit scope of the present utility model; allly be familiar with this skill personage; the equivalent structure that utilization the utility model specification and claim are done changes, and ought to be covered by in the claimed claim of the utility model.

Claims

1. Multi-spiral Angle Cutting Tool Structure, this drilling cutters mainly includes handle of a knife and drill lip portion, wherein by apex point end spiral helix angle is set in the drill lip portion; It is characterized in that in: include the flute length that helix angle constituted more than at least two sections in the drill lip portion, each section helix angle difference, the leading portion and the angle setting between the back segment helix angle that are presented with drill lip portion center line are to be successively decreased by gradually for a short time greatly, and its groove area also promotes thereupon.