CN206153632U - Solid carbide composite drill bit - Google Patents

Abstract

The utility model provides a solid carbide composite drill bit, including spiral bit and centering drill bit, the centering drill bit is connected and to be put at spiral bit front end central point, and spiral bit's front end shoulder is equipped with and mills the sword, and the unbearable angle of centering drill bit is greater than waits to process the inclined plane inclination, and the core of centering drill bit is thick in 1.1mm, and the closed angle department of milling the sword is equipped with a 0.1mm radius angle, and mills and be equipped with 0.1mm closed angle protection on the rake face of sword. Through set up a centering drill bit at spiral bit front end central part, the centering drill bit of front end plays location and guiding function to drilling on the one hand, can make the drill bit not have under the circumstances of preprocessing, easily realizes inclined plane location and drilling, and on the other hand has combined spiral bit high -speed machining's advantage, and then has solved high -speed on the inclined plane, stable problem of holing, has improved machining efficiency and product stability to the position and the smooth finish of drilling have been guaranteed simultaneously.

Description

A kind of whole hard alloy composite drill bit

Technical field

The utility model is related to cutter manufacture field, more particularly to a kind of whole hard alloy composite drill bit.

Background technology

Existing spiral bit has the disadvantages that：One be each point on main cutting edge anterior angle numerical value change it is very big, be close to It has been negative rake at drill core, machining condition is poor；Two is that chisel edge is oversize, there is very big sword drift angle, there is very big negative rake again, is cut Cut condition worse, thus axial direction drag is big, cutting energy consumption is big, easily skidding, it is impossible to quickly and accurately feel relieved.Therefore drill bit is worked as When directly drilling on the inclined-plane of workpiece, the position in hole easily trains off, and with the increase of bevel angle, fractureing for drill bit is several Rate is substantially increased, and is that this generally mills out in the plane plane with milling cutter, allows drill bit and is pierced with the plane perpendicular to preprocessing, but this Sample has slowed down processing beat, considerably reduces operating efficiency.

Utility model content

The purpose of this utility model is to provide a kind of whole hard alloy composite drill bit such that it is able to which effectively solving is zero Cutter life short problem when drilling on the inclined-plane of part.

For achieving the above object, the utility model proposes whole hard alloy composite drill bit, including spiral bit and fixed Heart drill bit, the pilot bit is connected to spiral bit front end center position, and the nose shoulder of the spiral bit is provided with milling Sword, the unbearable angle of the pilot bit is more than inclination angle of inclined plane to be processed, and the core thickness of the pilot bit is 1.1mm, the milling The sharp corner for cutting sword is provided with Radius for 0.1mm roundings, and the rake face of the milling edge be provided with a width for 0.1mm it is sharp Protect at angle.

Further, in the whole hard alloy composite drill bit, the pilot bit is integrated into spiral bit Shape.

Further, in the whole hard alloy composite drill bit, the indent of the spiral bit bottom is 3 °.

Further, in the whole hard alloy composite drill bit, a width of 0.2mm of land of the spiral bit, shovel Back of the body depth is 0.15mm.

Further, in the whole hard alloy composite drill bit, the angle of cutting edge of the spiral bit is 1 °.

Further, in the whole hard alloy composite drill bit, the unbearable angle is 120 °.

Compared with prior art, the beneficial effects of the utility model are：By arranging one in spiral bit front end center portion Pilot bit, the pilot bit of one side front end plays positioning and guiding function to drilling, enables to drill bit without pre-add In the case of work, contour localization and drilling are easily realized, on the other hand combine the advantage of spiral bit High-speed machining, and then solved Determined on inclined-plane at a high speed, the problem of stable drilling, improve working (machining) efficiency and product stability, and while ensure that drilling Position and fineness.

Description of the drawings

Fig. 1 is the schematic diagram of the embodiment whole hard alloy composite drill bit of the utility model one；

Fig. 2 is the top view of the embodiment whole hard alloy composite drill bit of the utility model one；

Fig. 3 is the machining sketch chart of the embodiment whole hard alloy composite drill bit of the utility model one.

Specific embodiment

Whole hard alloy composite drill bit of the present utility model is described in more detail below in conjunction with schematic diagram, its In illustrate preferred embodiment of the present utility model, it should be appreciated that those skilled in the art can change described here practicality It is new, and still realize advantageous effects of the present utility model.Therefore, description below is appreciated that for people in the art Member's is widely known, and is not intended as to restriction of the present utility model.

As depicted in figs. 1 and 2, the utility model proposes whole hard alloy composite drill bit, including spiral bit 1 and fixed Heart drill bit 2, the pilot bit 2 is connected to the front end center position of spiral bit 1, and the nose shoulder of the spiral bit 1 is provided with Milling edge 3, the unbearable angle γ of the pilot bit 2 is more than inclination angle of inclined plane to be processed, and the unbearable angle γ is preferably 120 °, the core thickness w of the pilot bit 2 is 1.1mm, and the sharp corner of the milling edge 3 is provided with Radius for 0.1mm roundings (R1), and the milling edge 3 rake face be provided with a width for 0.1mm wedge angles protect (R2), can effectively prevent milling edge 3 sharp Angle or rake face are excessively sharp, so as to strengthen the rigidity of milling edge 3, it is to avoid milling edge 3 occurs tipping problem.

Specifically, in the present embodiment, the pilot bit 2 is one of the forming with spiral bit 1.

Specifically, in the present embodiment, indent β of the bottom of the spiral bit 1 is 3 °.

Specifically, in the present embodiment, the margin width a of the spiral bit 1 is 0.2mm, and back-off depth b is 0.15mm.

Specifically, in the present embodiment, the angle of cutting edge α of the spiral bit 1 is 1 °.

As shown in figure 3, in the present embodiment, the whole hard alloy composite drill bit when in use, centering described first Drill bit 2 is positioned on inclined-plane to be processed 4, and then 3 pairs of inclined-planes 4 of the milling edge carry out milling, and mill out on inclined-plane 4 One plane, the subsequent spiral bit 1 is drilled on the plane, and milling tool plane is used alone so as to save Operation, while also ensuring the same circumference each point uniform force of the spiral bit 1, significantly improves borehole stability.

To sum up, in the whole hard alloy composite drill bit that the utility model embodiment is provided, by before spiral bit End central part arranges a pilot bit, and the pilot bit of one side front end plays positioning and guiding function, enables to drilling Drill bit easily realizes contour localization and drilling in the case of without preprocessing, on the other hand combines spiral bit and adds at a high speed The advantage of work, and then solve on inclined-plane at a high speed, the problem of stable drilling improves working (machining) efficiency and product stability, and Position and the fineness of drilling is ensure that simultaneously.

Preferred embodiment of the present utility model is above are only, any restriction effect is not played to the utility model. Any person of ordinary skill in the field, in the range of without departing from the technical solution of the utility model, to the utility model The technical scheme and technology contents of exposure makes the variation such as any type of equivalent or modification, belongs to without departing from the utility model Technical scheme content, still fall within protection domain of the present utility model.

Claims (6)

1. a kind of whole hard alloy composite drill bit, it is characterised in that including spiral bit and pilot bit, the pilot bit Spiral bit front end center position is connected to, the nose shoulder of the spiral bit is provided with milling edge, the brill of the pilot bit Heart angle is more than inclination angle of inclined plane to be processed, and the core thickness of the pilot bit is 1.1mm, and the sharp corner of the milling edge is provided with half Footpath is 0.1mm roundings, and the rake face of the milling edge is provided with a width for the protection of 0.1mm wedge angles.

2. whole hard alloy composite drill bit according to claim 1, it is characterised in that the pilot bit and fluted drill Head is one of the forming.

3. whole hard alloy composite drill bit according to claim 1, it is characterised in that the spiral bit bottom it is interior Recessed is 3 °.

4. whole hard alloy composite drill bit according to claim 1, it is characterised in that the margin width of the spiral bit For 0.2mm, back-off depth is 0.15mm.

5. whole hard alloy composite drill bit according to claim 1, it is characterised in that the angle of cutting edge of the spiral bit For 1 °.

6. whole hard alloy composite drill bit according to claim 1, it is characterised in that the unbearable angle is 120 °.