Improved diamond thin-wall dry drill bit

Abstract

The utility model provides an improved diamond thin-wall dry drill bit which comprises a base body and a plurality of tool bits formed by sintering a plurality of layers of cold-pressed blanks, and the tool bits are welded to the front end of the base body. The cold-pressed blank comprises a working layer and a welding layer, a plurality of rows of diamond particles are evenly and orderly arranged on the working layer, the diamond particles are vertically arranged in the direction of a tool edge of the tool bit, and every two adjacent rows of diamond particles are arranged in a staggered mode. An improved diamond thin-wall dry drill bit can achieve efficient chip removal and rapid heat dissipation, and meanwhile has extremely high initial sharpness and lasting cutting capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to drill bit technical field, concretely is an improved diamond thin wall dry drilling drill bit. BACKGROUND

[0002] In recent years, with the development of world economy, people's life quality requirement is higher and higher. Diamond thin wall dry drilling drill bit is widely used in the dry type drilling operation of the wall or ground which has been decorated. However, the existing diamond thin wall dry drilling drill bit in practical use, especially when drilling the concrete containing steel bar or above C35, often faces two prominent technical problems:

[0003] 1. Poor chip removal and poor heat dissipation: since dry drilling does not flush water, a large amount of drill chips and heat generated by cutting cannot be taken away in time; drill chips are easy to block between drill bit and hole wall, resulting in increased friction resistance, drill bit overheating, and even causing the diamond of the drill bit to be burned and fail, which seriously affects the drilling efficiency and service life.

[0004] 2. Difficulty in cutting and poor sharpness retention: when facing high-hardness concrete, the traditional drill bit design is unreasonable, resulting in large cutting force, easy to slip, and the cutting edge (diamond) cannot be updated in time after dulling, so the sharpness decays rapidly, making the drilling process slow and laborious. INVENTION CONTENTS

[0005] In view of the deficiencies of the prior art dry drilling drill bit, the utility model provides an improved diamond thin wall dry drilling drill bit, which can realize efficient chip removal, rapid heat dissipation, and at the same time has high initial sharpness and long cutting capacity.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: an improved diamond thin wall dry drilling drill bit, comprising a base body and a plurality of drill bits sintered from a plurality of cold compacts, a plurality of drill bits are welded at the front end of the base body; the cold compact comprises a working layer and a welding layer, a plurality of rows of diamond particles are uniformly and orderly arranged on the working layer, the diamond particles are vertically arranged along the cutting edge direction of the drill bit, and the adjacent two rows of diamond particles are staggered.

[0007] Further, the base body is a cylindrical base body, and a plurality of drill bits are circumferentially spaced and welded to one end of the cylindrical base body.

[0008] Further, the drill bit comprises a first side face towards the center and a second side face away from the center; the first side face is stamped to form a first groove, and the second side face is stamped to form a second groove; the first groove extends from the welding end of the welding layer to the cutting edge of the working layer, and the second groove extends from the welding end of the welding layer to the cutting edge of the working layer.

[0009] Further, the cutter head is provided with a plurality of arc-shaped protrusions on the cutting edge end, and the plurality of arc-shaped protrusions are arranged one by one corresponding to each first groove and second groove.

[0010] Further, the number of the first grooves is a plurality, and the plurality of first grooves are equidistantly spaced; the number of the second grooves is a plurality, and the plurality of second grooves are equidistantly spaced.

[0011] Further, the outer wall of the base body forms a continuous spiral groove.

[0012] Further, the base body is formed with a through structure on the wall body.

[0013] Further, the through structure comprises at least one group of through holes arranged along the outer circumferential direction of the base body.

[0014] Further, the through hole group comprises a plurality of spaced through holes.

[0015] The improved diamond thin-wall dry drilling drill bit of the utility model realizes the improvement of sharpness, chip removal efficiency and heat dissipation performance of the dry drilling drill bit through the innovative structure of "vertically staggered and orderly arranged diamond in working layer", "cutter head side groove and cutting edge arc-shaped protrusion" and "base body spiral groove and through hole group", and has the following beneficial effects:

[0016] 1. By arranging the diamond particles in the cutter head in the innovative structure of vertical and adjacent staggered arrangement, the number of diamond particles participating in drilling at a time is significantly increased, and a multi-point and staggered drilling track is formed, thereby greatly improving the overall sharpness and cutting efficiency of the dry drilling drill bit; at the same time, the ordered structure ensures that the outer layer of blunt diamond can be timely removed, and the next layer of sharp diamond particles can be timely sharpened, thereby realizing an ideal and controllable diamond sharpening state.

[0017] 2. The grooves extending to the cutting edge are formed on the two sides of the cutter head by stamping, and this design innovatively forms an additional chip removal channel on the cutter head, which can effectively guide the drill chips to be discharged from the groove, greatly reducing the blockage and accumulation of the drill chips near the cutter head, thereby reducing the working resistance and temperature, avoiding the burning and slipping of the cutter head caused by poor chip removal; the equidistantly spaced grooves ensure the uniformity of the chip removal channel and the symmetry of the cutting force, thereby ensuring the smooth operation of the drill bit during the working process and avoiding vibration and eccentric wear caused by uneven stress.

[0018] 3、The outer wall of the base forms a continuous spiral groove, and the spiral groove constitutes a main chip removal channel, which can automatically and continuously throw the drill chips backward by using the rotating centrifugal force, realizing efficient and smooth chip removal; at the same time, the spiral groove reduces the weight of the base, reduces the labor intensity of the operator, reduces the frictional resistance between the base and the drilling, and improves the operation feeling. The base is formed with a through structure on the wall body, and the through structure forms a higher level of chip removal and heat dissipation channel. The plurality of through holes not only provide more paths for chip removal and prevent internal blockage during deep hole drilling, but more importantly, they greatly increase the heat dissipation area of the base, effectively cool the drill bit inside by using air flow, and fundamentally alleviate the problem of heat accumulation in dry drilling operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the improved diamond thin-wall dry drilling drill bit in the utility model.

[0020] Figure 2 It is a structure schematic view of the tool bit in the utility model.

[0021] Figure 3 It is a top view of the tool bit in the utility model.

[0022] Figure 4 It is a front view of the tool bit in the utility model.

[0023] Reference signs: improved diamond thin-wall dry drilling drill bit 100, base 1, spiral groove 11, through structure 12, through hole group 121, through hole 1211, tool bit 2, cold-pressed blank 21, working layer 211, welding layer 212, diamond particles 3, first side surface 22, second side surface 23, first recess 24, second recess 25, arc-shaped protrusion 26, water gap 27. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the utility model specification. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to the drawings in the utility model specification Figures 1-4The utility model provides a kind of improved diamond thin-wall dry drilling drill bit 100, including base body 1 and multiple tool bits 2 sintered by multiple cold compacts 21, multiple tool bits 2 are welded in the front end of base body 1;The cold compact 21 includes working layer 211 and welding layer 212, multiple rows of diamond particles 3 are uniformly and orderly arranged on the working layer 211, the diamond particle 3 is vertically arranged along the cutting edge direction of tool bit 2, and the diamond particle 3 of adjacent two rows is staggered arrangement.Cold compacts 21 are formed with certain strength by arranging diamond particles on the surface of working layer powder, applying certain pressure to mould at room temperature, making powder compact, and the cold compacts 21 are preformed, and multiple cold compacts 21 are finally formed into high-density, solid diamond tool bit by hot-press sintering technology.The diamond particle 3 is arranged in tool bit 2 with vertical and adjacent row staggered innovative structure, the number of diamond particles 3 participating in drilling is significantly increased, and multiple-point, staggered drilling trajectory is formed, so that the overall sharpness and drilling efficiency of improved diamond thin-wall dry drilling drill bit 100 are greatly improved;Meanwhile, this ordered structure ensures that the dull diamond of outer layer can be timely dropped, so that the next layer of sharp diamond particles 3 is timely sharpened, and ideal and controllable diamond sharpening state is realized.

[0026] In the utility model, the base body 1 is cylindrical base body 1, and multiple tool bits 2 are circumferentially spaced and welded on one end of the cylindrical base body 1. The tool bits 2 are circumferentially spaced and welded on the cylindrical base body 1, and the water gap 27 for chip removal is naturally formed between adjacent tool bits 2, realizing the organic combination of drilling and chip removal functions.

[0027] In the utility model, as shown in the accompanying drawings Figures 2-4As shown, the tool head 2 comprises a first side 22 towards the center of the circle and a second side 23 away from the center of the circle; the first side 22 is formed with a first groove 24 by stamping (or hot pressing), and the second side 23 is formed with a second groove 25 by stamping (or hot pressing); the first groove 24 extends from the welding end of the welding layer 212 to the cutting edge of the working layer 211, and the second groove 25 extends from the welding end of the welding layer 212 to the cutting edge of the working layer 211. The grooves are formed on both sides of the tool head 2 and extend to the cutting edge, which innovatively forms an additional chip removal channel on the tool head 2, effectively guiding the drill chips out of the groove, greatly reducing the blockage and accumulation of drill chips near the tool head 2, thereby reducing the working resistance and temperature, and avoiding the tool head 2 from being burned and slipping due to poor chip removal. At the same time, the diamond concentration at the first groove 24 and the second groove 25 is high, and the diamond concentration in the remaining groove-free area is lower than that in the groove area, forming a diamond concentration difference; during operation, the diamond concentration in the groove-free area of the tool head is low, the cutting edge is fast and sharp, but the diamond is more prone to wear and fall off, but in the groove area, the diamond particles are concentrated, the concentration is high, and during drilling, the consumption is slow, the diamond life is high, the two areas are complementary, and the cutting edge forms a sawtooth structure, which can improve the drilling performance of the tool head 2.

[0028] In the utility model, the tool head 2 is provided with a plurality of arc protrusions 26 on the cutting edge end, and the plurality of arc protrusions 26 are correspondingly arranged with each first groove 24 and second groove 25, that is, one first groove 24 corresponds to one arc protrusion 26 on the cutting edge end, and one second groove 25 corresponds to one arc protrusion 26 on the cutting edge end. The arc protrusion 26 can generate pre-stress on the drilling object such as concrete, further improving the cutting ability and sharpness of the dry drilling bit.

[0029] In the utility model, the number of the first grooves 24 is multiple, and the multiple first grooves 24 are equidistantly spaced; the number of the second grooves 25 is multiple, and the multiple second grooves 25 are equidistantly spaced. The equidistant spacing of the grooves ensures the uniformity of the chip removal channel and the symmetry of the cutting force, ensures the smooth operation of the drill bit during the working process, and avoids vibration and eccentric wear caused by uneven stress.

[0030] In the utility model, the outer wall of the base body 1 forms a continuous spiral groove 11. The spiral groove 11 constitutes a main chip removal channel, which can automatically and continuously throw out the drill chips by utilizing the rotating centrifugal force, realizing efficient and smooth chip removal; at the same time, the spiral groove 11 reduces the weight of the base body 1, reduces the labor intensity of the operator, reduces the friction resistance between the base body 1 and the drilling object, and improves the operation feeling.

[0031] In the utility model, the base body 1 is formed with the through structure 12 on the wall body. The through structure 12 includes at least one group of through hole groups 121 arranged along the outer circumferential direction of the base body 1. The through hole group 121 includes a plurality of long strip-shaped through holes 1211 distributed at intervals. The through hole group 121 forms a higher level of chip removal and heat dissipation channel, and the plurality of through holes 1211 not only provide more paths for chip removal while ensuring the strength of the base body 1, prevent internal blockage when drilling deep holes, more importantly, they greatly increase the heat dissipation area of the base body 1, effectively cool the drill bit inside by air flow, fundamentally alleviate the problem of heat accumulation in dry drilling operation. Preferably, the number of through hole groups 121 is 2 groups, and the two groups of through hole groups 121 are distributed along the length direction of the base body 1.

[0032] The improved diamond thin-wall dry drilling drill bit 100 of the utility model realizes the improvement of the sharpness, chip removal efficiency and heat dissipation performance of the dry drilling drill bit through the innovative structure of "the working layer 211 is provided with vertically staggered and orderly arranged diamonds", "the side groove of the tool bit 2 and the arc-shaped protrusion 26 of the cutting edge" and "the spiral groove 11 of the base body 1 and the through hole group 121". The drilling process is light and fast, and the sharpness does not attenuate; the drill chips can be smoothly and continuously discharged through the groove of the tool bit 2, the water gap between the tool bits 2, the spiral groove 11 and the through hole 1211, and the dry drilling blockage problem is solved; meanwhile, the excellent heat dissipation structure ensures that the drill bit can still maintain stable performance at high temperature, and effectively prevents the tool bit 2 from being burned and the base body 1 from overheating. Finally, the improved diamond thin-wall dry drilling drill bit 100 of the utility model is significantly improved in drilling efficiency and service life, and excellent operation experience and comprehensive economic benefits are brought.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An improved diamond thin-wall dry drilling bit, characterized by: The cutting tool comprises a base and a plurality of cutting heads sintered from a plurality of cold-pressed blanks, and the plurality of cutting heads are welded to the front end of the base; the cold-pressed blank comprises a working layer and a welding layer, and a plurality of rows of diamond particles are uniformly and orderly arranged on the working layer, the diamond particles are vertically arranged along the cutting edge direction of the cutting head, and the adjacent two rows of diamond particles are staggered.

2. The improved diamond thin-wall dry drilling drill bit according to claim 1, characterized in that: The base is a cylindrical base, and the plurality of cutting heads are circumferentially and interval ly distributed and welded to one end of the cylindrical base.

3. The improved diamond thin-wall dry drilling drill bit according to claim 2, characterized in that: The cutting head comprises a first side surface towards the center and a second side surface away from the center; the first side surface is formed with a first groove by stamping, and the second side surface is formed with a second groove by stamping; the first groove extends from the welding end of the welding layer to the cutting edge of the working layer, and the second groove extends from the welding end of the welding layer to the cutting edge of the working layer.

4. The improved diamond thin-wall dry drilling drill bit according to claim 3, characterized in that: The cutting head is provided with a plurality of arc-shaped protrusions on the cutting edge end, and the plurality of arc-shaped protrusions are one-to-one corresponding to each first groove and second groove.

5. The improved diamond thin-wall dry-drill bit of claim 4, wherein: The number of the first grooves is a plurality, and the plurality of first grooves are equidistantly and interval ly distributed; the number of the second grooves is a plurality, and the plurality of second grooves are equidistantly and interval ly distributed.

6. The improved diamond thin-wall dry drilling drill bit according to any one of claims 1-5, characterized in that: The outer wall of the base forms a continuous spiral groove.

7. The improved diamond thin-wall dry-drill bit of claim 6, wherein: The base is formed with a through structure on the wall body.

8. The improved diamond thin-wall dry-drill bit of claim 7, wherein: The through structure comprises at least one group of through holes arranged along the outer circumferential direction of the base.

9. The improved diamond thin-wall dry-drill bit of claim 8, wherein: The through hole group comprises a plurality of interval ly distributed through holes.

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