CN103963173A - High-strength sustainable diamond thin-wall drill - Google Patents
High-strength sustainable diamond thin-wall drill Download PDFInfo
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- CN103963173A CN103963173A CN201410211813.5A CN201410211813A CN103963173A CN 103963173 A CN103963173 A CN 103963173A CN 201410211813 A CN201410211813 A CN 201410211813A CN 103963173 A CN103963173 A CN 103963173A
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Abstract
The invention relates to a high-strength sustainable diamond thin-wall drill. The high-strength sustainable diamond thin-wall drill comprises a thin-wall drill body and a diamond tool bit, wherein diamond protective layers are formed on the inner surface and the outer surface of the thin-wall drill body in an electroplate mode, the diamond tool bit is welded to the end of the thin-wall drill body through a laser welding process, each diamond protective layer is composed of a nickel base electroplated coating with the thickness ranging from 1.0 mm to 1.5 mm and diamonds which are mixed up with the electroplated coating, the static-pressure strength of the diamonds ranges from 20 kilograms to 30 kilograms, and the concentration of the diamonds in each diamond protective layer ranges from 30% to 90%. According to the high-strength sustainable diamond thin-wall drill, on the premise that different types of operational performance are ensured, safety performance of the thin-wall drill can be improved, drilling efficiency is improved, drill pipe abrasion is reduced, and therefore the purposes that the thin-wall drill can be repeatedly used, and the material cost is reduced can be achieved.
Description
Technical field
The present invention relates to the technical field of diamond composite drill bit, more particularly, the present invention relates to a kind of for the boring of the hard brittle materia such as concrete, glass, pottery and refractory material or get the high strength sustainable use diamond core drill bit of core.
Background technology
In building trade, diamond core drill bit has been widely used in concrete at present, granite, refractory brick, and in the hard brittle materia Drilling operation activities in production such as glass, pottery, hole as wide open in wall air-conditioning, granite surface drilling etc.Traditional diamond core drill bit adopts silver soldering technique, weld strength is low, easily in drilling process, falling tooth causes thin-walled drill to work even to scrap, tradition diamond core drill bit body is owing to there is no diamond layer protection, easily produce friction at drilling process middle tube body and rapidoprint and cause rate of penetration slow, rapidoprint is difficult to cause and cannot process continuously from coming off in managing; Under normal circumstances, it is over half that thin-walled drill body cost accounts for totle drilling cost, and traditional thin diamond wall is drilled in drilling process rapidoprint and tube wall is produced to wearing and tearing easily makes tube wall attenuation, thereby body cannot reuse and causes significant wastage.How to improve rate of penetration, strengthen Product Safety, reduce transducer wall ' s abrasion, be a diamond tool manufacturing enterprise difficult problem extremely to be solved thereby body can be reused reach reduction material cost object always.
Summary of the invention
In order to solve above-mentioned technical problem of the prior art, the object of the present invention is to provide a kind of high strength sustainable use diamond core drill bit.Thin-walled drill of the present invention, ensureing in every serviceability situation, can to improve the security performance of thin-walled drill, improves drilling efficiency, reduces drilling pipe wearing and tearing, thereby can realize and reach repeatedly recycling, reduces the object of material cost.
In order to solve the described technical problem of invention and to realize goal of the invention, the present invention has adopted following technical scheme:
A kind of high strength sustainable use diamond core drill bit, comprises thin-walled drill drill body and diamond segment; It is characterized in that: described thin-walled drill drill body surfaces externally and internally is electroplated and is formed with dlc protective layer; The end of described thin-walled drill drill body is welded with diamond segment by laser welding process.
Wherein, described diamond segment is by metal powder and high-strength diamond sinter molding, and wherein said metal powder comprises the copper of 20～30wt%, the brill of 60～70wt%, the tin of 3～8wt%, and the nickel of 3～10wt%.
Wherein, described adamantine isostatic pressing strength is 30～40 kilograms, and concentration is 30～40%.
Wherein, described dlc protective layer is by the Ni-based electrodeposited coating of 1.0～1.5mm be mixed in isostatic pressing strength therebetween and formed by the diamond of 20～30 kilograms; And be 30～90% in adamantine concentration described in described dlc protective layer.
Wherein, described thin-walled drill drill body is made up of seamless steel pipe, and it contains C:0.17～0.24wt% in chemical composition, Si:0.17～0.37wt%, Mn:0.35～0.65wt%, S≤0.035wt%, P≤0.035wt%, Cr≤0.25wt%, Ni≤0.25wt%, Cu≤0.25wt%.
Tensile strength sigma b >=the 450MPa of wherein said seamless steel pipe; Yield strength σ s >=275MPa; Percentage elongation δ 5 >=24%.
Compared with immediate prior art, high strength sustainable use diamond core drill bit of the present invention has following beneficial effect:
1. the diamond core drill bit weld strength that adopts the present invention to produce is high, and security is good, can be because impulsive force is large in drilling process, and body generates heat and causes diamond segment to come off.
2. the diamond core drill bit rate of penetration that adopts the present invention to produce is fast, creeps into power little, and rapidoprint easily comes off in body, can not produce that rapidoprint is stuck cannot process phenomenon continuously.
3. between the diamond core drill bit drilling pipe that employing the present invention produces and rapidoprint, rub very little, drilling pipe is not easy to wear, and after diamond segment wearing and tearing, drilling pipe can reuse, and greatly reduces material cost.
Brief description of the drawings
Fig. 1 is the structural representation of high strength sustainable use diamond core drill bit of the present invention.
Detailed description of the invention
Below with reference to specific embodiment, high strength sustainable use diamond core drill bit of the present invention is further elaborated, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technical scheme; It is to be noted that the description of related structure in embodiment, function and material etc. is all exemplary, and do not refer to the restriction to invention protection domain.
As shown in Figure 1, high strength sustainable use diamond core drill bit shown in the present, comprises thin-walled drill drill body 10 and diamond segment 20; Described thin-walled drill drill body 10 surfaces externally and internallies are electroplated and are formed with interior dlc protective layer 30 and outer dlc protective layer 40; The end of described thin-walled drill drill body is welded with diamond segment by laser welding process.Wherein, described diamond segment is by metal powder and high-strength diamond sinter molding, and wherein said metal powder comprises the copper of 20～30wt%, the cobalt of 60～70wt%, the tin of 3～8wt%, and the nickel of 3～10wt%; Described adamantine isostatic pressing strength is 30～40 kilograms, and concentration is 30～40%.Described dlc protective layer is by the chemical Ni-plating layer of 1.0～1.5mm and be mixed in isostatic pressing strength therebetween and formed by the diamond of 20～30 kilograms; And be 30～90% in adamantine concentration described in described dlc protective layer.High strength sustainable use diamond core drill bit of the present invention can adopt the operation comprising the following steps to prepare: (1) body processing: according to drawing requirement, welding tractor machining needs thin-walled drill body; (2) chemical plating dlc protective layer: by after thin-walled drill body degreasing and rust removal, put into chemical plating fluid according to different size demand, adding intensity is 20～30 kilograms of diamonds, adopts chemical plating process, by do not stop stir, by diamond uniform plating in body surface; (3) diamond segment sheet sinter molding processed: according to concrete instructions for use, choose different component copper, cobalt, tin, nickel, adopt varying strength granularity, concentration diamond, after mixing by compressing, hot pressed sintering, grinder buffing is prepared diamond segment, its hot pressed sintering temperature is 780～870 DEG C, pressure 250～350kg/cm
2, temperature retention time 3～5min; (4) laser weld: the thin-walled drilling pipe after chemical plating is arranged on laser weld frame, puts into diamond segment, regulate laser power 1500～1800W, rotating speed 1000～1400mm/ minute, adjusts welding position, opens laser machine and welds; (5) polish, spray paint, check: thin-walled drill special grinding wheel after welding is put the first edge on a knife or a pair of scissors diamond segment is polished diamond is fully exposed, then carry out surface lacquer, dry, finally with 600N/mm
2strength criterion carries out bending resistance detection to each diamond segment, qualified rear printing packaging warehouse-in.
Embodiment 1
The preparation of diamond segment sintered body: mixed with diamond by metallic bond, after compacting, hot pressed sintering forms; The temperature of hot pressed sintering is 850 DEG C, and pressure is 300kg/cm
2, temperature retention time is 4 minutes; Wherein, described adamantine isostatic pressing strength is 35%, and adamantine concentration is 30%; The proportioning of metallic bond in each sample (powder stock, particle diameter is 1～5 micron, material purity is higher than 99.0%) is as shown in table 1:
Table 1wt%
| Sample | Sn | Ni | Cu | Mn | Cr | Co |
| Sample 1 | 3 | 5 | 22 | / | / | 70 |
| Sample 2 | 3 | 5 | 20 | 12 | / | 60 |
| Sample 3 | 3 | 5 | 20 | / | 12 | 60 |
| Sample 4 | 3 | 5 | 20 | 4 | 8 | 60 |
"/" represents not add this component.
Measure by the following method golden bending strength and the wear resistance ratio of above-mentioned diamond segment sintered body sample: wear resistance ratio is measured according to JB3/T3235-1999; By the hard rock cutter head sintered body of 40mm × 5mm × 5mm being placed directly on two bearings of the 30mm of being separated by, in the middle of interval, give power, until sample fracture.Result is as shown in table 2:
The performance of table 2 diamond segment sintered body
| Performance | Sample 1 | Sample 2 | Sample 3 | Sample 4 |
| Bending strength (MPa) | 1120 | 690 | 780 | 1250 |
| Wear resistance ratio (ten thousand) | 1.5 | 0.7 | 0.9 | 2.4 |
Embodiment 2
Chemical plating dlc protective layer: the consisting of of described chemical plating fluid: nickelous sulfate: 30～40g/L, inferior sodium phosphate: 35～40g/L, sodium potassium tartrate tetrahydrate: 8～10g/L, fluoboric acid: 5～8g/L, ethylenediamine: 3～5g/L, diamond: 0.1～1.0g/L.The temperature of chemical plating is 30～50 DEG C, and the time is 15～20 minutes.Described adamantine intensity is 20～30 kilograms.By above-mentioned chemical plating process, after thin-walled drill body surface chemical plating dlc protective layer, its coefficient of friction can reach between 0.08～0.12, and lubricity is good especially, and hardness is high.During with use, and between material, friction is very little, and body is not easy to wear, and after diamond segment wearing and tearing, drilling pipe can reuse for several times to tens of inferior.Table 3 shows the chemical plating fluid composition (chemical plating temperature is 30 DEG C, and the time is 20 minutes) of each sample.
Table 3g/L, wherein adamantine content is 0.2g/L, and adamantine intensity is 20～30 kilograms, and granularity is 30/40
Wherein, "/" represents not add this component.
Wherein, sample 5 at normal temperatures with the coefficient of sliding friction minimum on the surface such as stone material, glass, and wearability is the highest; Body section after chemical plating is carried out to milled than test (JB3/T3235-1999), and its wear resistance ratio can reach more than 1.2 ten thousand, and sample 6-9 is all lower than 4000.
For the ordinary skill in the art; specific embodiment is just exemplarily described the present invention; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (6)
1. a high strength sustainable use diamond core drill bit, comprises thin-walled drill drill body and diamond segment; It is characterized in that: described thin-walled drill drill body surfaces externally and internally is electroplated and is formed with dlc protective layer; The end of described thin-walled drill drill body is welded with diamond segment by laser welding process.
2. high strength sustainable use diamond core drill bit according to claim 1, it is characterized in that: described diamond segment is by metal powder and high-strength diamond sinter molding, wherein said metal powder comprises the copper of 20～30wt%, the cobalt of 60～70wt%, the tin of 3～8wt%, and the nickel of 3～10wt%.
3. high strength sustainable use diamond core drill bit according to claim 2, it is characterized in that: the isostatic pressing strength of described high-strength diamond is 30～40 kilograms, and concentration is 30～40%.
4. high strength sustainable use diamond core drill bit according to claim 1, is characterized in that: described dlc protective layer is by the Ni-based electrodeposited coating of 1.0～1.5mm and be mixed in isostatic pressing strength therebetween and formed by the diamond of 20～30 kilograms; And be 30～90% in adamantine concentration described in described dlc protective layer.
5. high strength sustainable use diamond core drill bit according to claim 1, it is characterized in that: described thin-walled drill drill body is made up of seamless steel pipe, it contains C:0.17～0.24wt% in chemical composition, Si:0.17～0.37wt%, Mn:0.35～0.65wt%, S≤0.035wt%, P≤0.035wt%, Cr≤0.25wt%, Ni≤0.25wt%, Cu≤0.25wt%.
6. high strength sustainable use diamond core drill bit according to claim 5, is characterized in that: the tensile strength sigma b >=450MPa of described seamless steel pipe; Yield strength σ s >=275MPa; Percentage elongation δ >=24%.
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| CN201410211813.5A CN103963173B (en) | 2014-05-20 | 2014-05-20 | High strength sustainable use diamond core drill bit |
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| CN201410211813.5A CN103963173B (en) | 2014-05-20 | 2014-05-20 | High strength sustainable use diamond core drill bit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070246266A1 (en) * | 2004-07-01 | 2007-10-25 | Goran Larbo | Drill Bit |
| CN201521248U (en) * | 2009-08-28 | 2010-07-07 | 桂林矿产地质研究院 | Impregnated diamond bit with protective steel body |
| CN202388632U (en) * | 2011-12-28 | 2012-08-22 | 福建万龙金刚石工具有限公司 | Diamond drill bit with higher service efficiency |
| CN202517605U (en) * | 2011-12-26 | 2012-11-07 | 长沙泰维超硬材料有限公司 | Electroforming diamond cutter for picking sapphire ingot |
| RU2473773C1 (en) * | 2011-09-26 | 2013-01-27 | Николай Митрофанович Панин | Diamond crown bit |
| CN103624260A (en) * | 2013-11-30 | 2014-03-12 | 河南鑫鑫金刚石工具有限公司 | Tool bit for cutting granite and manufacturing technology thereof |
-
2014
- 2014-05-20 CN CN201410211813.5A patent/CN103963173B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070246266A1 (en) * | 2004-07-01 | 2007-10-25 | Goran Larbo | Drill Bit |
| CN201521248U (en) * | 2009-08-28 | 2010-07-07 | 桂林矿产地质研究院 | Impregnated diamond bit with protective steel body |
| RU2473773C1 (en) * | 2011-09-26 | 2013-01-27 | Николай Митрофанович Панин | Diamond crown bit |
| CN202517605U (en) * | 2011-12-26 | 2012-11-07 | 长沙泰维超硬材料有限公司 | Electroforming diamond cutter for picking sapphire ingot |
| CN202388632U (en) * | 2011-12-28 | 2012-08-22 | 福建万龙金刚石工具有限公司 | Diamond drill bit with higher service efficiency |
| CN103624260A (en) * | 2013-11-30 | 2014-03-12 | 河南鑫鑫金刚石工具有限公司 | Tool bit for cutting granite and manufacturing technology thereof |
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| CN103963173B (en) | 2015-12-30 |
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