CN2757979Y - Multi-helix angle cutting tool structure - Google Patents

Abstract

The utility model relates to a many spiral angles cutting tool structure, this drilling cutter mainly including handle of a knife and drilling part, wherein set up the spiral inclination by drill point end spiral on the drilling part, include the groove length that the spiral inclination more than two-section at least constitutes on this drilling part, each section spiral inclination is different to the angle setting between anterior segment that the central line of drilling part appears and the back end spiral inclination is steadilys decrease by big gradually, and its ditch groove area also promotes thereupon. According to the design of the multi-spiral angle structure provided by the utility model, a drill center with gradually thickened thickness is arranged between the spiral inclination angle of the drill edge part and the web plate, and the spiral inclination angle arranged on the drill edge part is also increased from deep to shallow, so the cutting amount is sufficient, and the scraps are not easy to block in the aperture; therefore, the thickness of the drill core at the drill edge part is gradually increased, so that the rigidity of the drilling tool is also improved, when the drilling is carried out at higher rotating speed, the performance of the hole site precision is better, and the situations of deflection and broken needles are not easy to see.

Description

Multi-helix angle cutting tool structure

technical field

The utility model relates to a multi-helical angle cutting tool structure specially used for drilling apertures, in particular to a multi-helical multi-helix that can improve the structural strength of the cutting tool and exert better chip removal performance by providing changes in multi-section inclination angle grooves. Angled cutting tool structure.

Background technique

For general drilling tools to have good drilling performance, the drill bit must be properly ground, and the correct grinding of the drill tip angle must depend on the material to be drilled to obtain better drilling performance.

In addition, the quality of a drilling tool is related to the design of the inclination angle of the drill edge. As shown in Fig. 1 and Fig. 2, the drilling tool 10 of a conventional drilling hole is shown in the icon, mainly divided into a handle 101 and a drill portion 102, the drill portion 102 has a helical angle groove length, and It is distinguished that there are multiple stages of inclination angles 103, and the angles of each inclination angle 103 are equal. Because the relative inclination angle 103 depth of the drilling tool 10 with a single helix angle can only achieve a certain cutting function; When dealing with difficult-to-cut plates, the drilling power must be strengthened, so the drilling tool 10 is prone to wear or the needle may be skewed or even broken due to insufficient rigidity.

Therefore, when the conventional drilling tool 10 implements the drilling hole position to the plate 3', due to insufficient rigidity and low chip removal rate, and because the chips are easy to block the chip removal groove during high-speed drilling, the chip removal groove is easily blocked by the chip material when drilling at a high speed. When the plate 3' is drilled with the hole diameter, the stacked lower plate 3 is likely to have a large deviation of the drilled hole 4' due to the insufficient rigidity of the drilling tool 10 and the small amount of chip removal, so it must be eliminated. Plate 3' is relatively elevated.

Contents of the invention

The utility model is based on the fact that the known drilling tool only has a single drilling helical inclination angle, so it is limited by the relationship between the helical inclination angle and the rotational speed, so the drilling tool is easy to be skewed, the needle is broken, and its cutting effect is not good (especially in stacked In the case of a large number of plates), the purpose of this utility model is to overcome the above-mentioned defects of the prior art, research and improve it, and then provide a multi-helix angle cutting tool, which has a multi-stage helix angle by providing the drill edge Change, so that there is a gradually thickened drill core between the helical inclination of the drill edge and the web, and the helical inclination designed for the drill edge is also from deep to shallow, between the front and rear helix angles presented by the center line The angle setting is gradually decreasing from large to small, and the groove area is also increased accordingly, so the amount of removal is sufficient, and it is not easy to block the chips in the chip removal groove; in addition, for drilling, it has multiple helix angles. The drilling tool has a better performance in hole position accuracy when drilling holes.

In addition, another purpose of the present utility model is to provide a drilling tool with good chip removal performance. The groove length of the drill edge portion of the drilling tool has a multi-helix angle structure design, and the helix angle (θ) Gradually decreases, so the relative chip removal volume will also increase, avoiding the drilling process from being easily blocked in the chip removal groove.

The following table compares the hole position accuracy of the multi-helical angle cutting tool (A) of the present invention and the conventional single-thread angle cutting tool (B) in actual drilling: Hole position accuracy: F3.3-multi-angle--the back of the third piece 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 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 Hole position accuracy: F3.3-single angle--the back of the third piece 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 1500 holes 1.094 0.770 1.102 0.670 0.812 1000 holes 1.257 0.772 1.094 0.719 0.883 Hole position accuracy: F3.9--multi-angle--the back of the third piece 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 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 Hole position accuracy: F3.9--single angle--the back of the third piece 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 1500 holes 1.162 0.983 0.854 0.651 0.764 1000 holes 1.355 1.141 1.073 0.789 0.923 Hole position accuracy: F3.3--multi-angle--the back of the second piece A 1 2 3 4 5 3000 holes 2.500 1.760 2.189 2.366 2.390 Hole position accuracy: F3.3--single angle--the back of the second piece B 1 2 3 4 5 3000 holes 2.151 1.417 1.713 1.112 1.150 Hole position accuracy: F3.9--multi-angle--the back of the second piece A 1 2 3 4 5 3000 holes 2.033 1.679 1.574 1.543 1.974 Hole position accuracy: F3.9--single angle--the back of the second piece B 1 2 3 4 5 3000 holes 2.097 1.619 1.199 0.903 1.306

It can be shown that the multi-angle helicity cutting tool (A) of the present utility model has better precision than the existing cutting tool (B) drill bit by the above two kinds of hole position accuracy and the drilling implementation table for multi-sheet plates. The accuracy of the hole position is high, and there is no needle breakage.

In order to further understand and understand the structure of the utility model and its effects, the embodiments are described in detail below in conjunction with the accompanying drawings, so as to better understand it.

Description of drawings

What Fig. 1 shows is the schematic plan view of appearance of conventional cutting tool;

What Fig. 2 shows is that the conventional cutting tool implements the hole is formed state schematic diagram to the drilling of multiple plates;

Shown in Fig. 3 is the appearance plane schematic diagram of the utility model;

What Fig. 4 shows is another appearance plan view of the utility model;

Fig. 5 is a schematic diagram of the hole formation state after the utility model is implemented to drill a plurality of stacked plates.

Symbol Description:

10 Drilling Tool 101 Tool Shank 102 Drilling Edge 103 Angle 1, 1′ Drilling Tool 11, 11′ Shank 12, 12′ Drilling Edge 121, 121′ Drilling Tip θ1, θ2, θ3, θ4, θ5 Helical Inclination 3, 3' plate 4, 4' drilling diameter

Detailed ways

Please refer to Fig. 3, the cutting tool in the figure is mainly a multi-helical angle drilling tool 1, wherein the drilling tool 1 includes a handle 11 and a drill portion 12, and the front end of the drill portion 12 includes At least two helical inclination angles θ1 and θ2 constitute the groove length of the drill edge portion 12, and each helical inclination angle θ1 and θ2 is different from the inclination angle, so the thickness of the drill core is also significantly different; in terms of the center line, the helix inclination angle θ1 to the helix inclination angle The angle between θ2 is set from large to small gradually, and the groove area is also increased accordingly. The groove formed by the drill edge 12 from the drill tip 121 to the direction of the helical inclination θ1 and θ2 is gradually increased, so its The amount of chip removal is sufficient, and it is relatively difficult to cause needle breakage due to chip blocking in the hole.

Furthermore, since the helical inclination angles θ1 and θ2 of the drill edge portion 12 have different depths and angles for each segment of the helical inclination angle during turning, the relative drill core thickness also gradually increases from the drill tip 121 to the rear. 1 It can also improve its rigidity to ensure that the needle is not easy to break during the drilling process, and the drilling accuracy is also greatly improved after the rigidity is improved.

Please refer to Figure 4 and Figure 5 again, the drilling tool 1' in the icon is another embodiment of a cutting tool with multiple helix angles, the drilling tool 1' includes a handle 11' and a drill portion 12' The front end of the drill edge portion 12' includes at least three helical inclination angles θ3, θ4 and θ5 to form the groove length of the drill edge portion 12', and each helical inclination angle θ3, θ4 and θ5 are different inclination angles, so the drill core The thickness and helical inclination groove width are also significantly different; since the helical inclination angle of the drill part 12' gradually decreases from θ3, θ4 to θ5, the chip holding capacity is relatively improved, which can reduce and improve the hole diameter when drilling plug and broken needles, and it is beneficial to improve the drilling accuracy, and when drilling multi-layer stacked plates 3, it can avoid the situation that the drilling hole 4 deviates more due to the insufficient rigidity of the drilling tool 1', and at the same time reduce the drilling Defective products produced during cutting.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model. Those who are familiar with this art can use the equivalent structural changes made by the specification of the utility model and the scope of the patent application. It should be covered within the scope of patents claimed by the utility model.

Claims (1)

1. A multi-helical angle cutting tool structure, the drilling tool mainly includes a handle and a drill portion, wherein the drill tip spirally sets the helix inclination on the drill portion; it is characterized in that: the drill portion includes at least The length of the groove formed by more than two helical inclination angles is different for each helical inclination angle. The angle setting between the front and rear helix inclination angles presented by the center line of the drill edge is gradually reduced from large to small, and the groove area is also It will increase accordingly.

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