CN1075417C - Method for mfg. of diamond thin-wall drill bit - Google Patents
Method for mfg. of diamond thin-wall drill bit Download PDFInfo
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- CN1075417C CN1075417C CN 99111363 CN99111363A CN1075417C CN 1075417 C CN1075417 C CN 1075417C CN 99111363 CN99111363 CN 99111363 CN 99111363 A CN99111363 A CN 99111363A CN 1075417 C CN1075417 C CN 1075417C
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- drill bit
- wall drill
- diamond thin
- diamond
- steel pipe
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Abstract
The present invention belongs to the field of a metal processing tool, which is mainly suitable for manufacturing a diamond thin-wall drill bit. In the present invention, a special die for manufacturing a diamond thin-wall drill bit is used; diamond powder and a steel pipe base are put or assembled into a male die of the die which is provided with a press head, and then the combined machine is put into a hydraulic machine to be pressed into a diamond thin-wall drill bit blank which comprises the steel pipe base; the blank is put into a sintering furnace with protective atmosphere for sintering to form the diamond thin-wall drill bit. The present invention has the advantages of high production efficiency and low cost, and the diamond drill bit is combined firmly with the steel pipe base and has long service life.
Description
The invention belongs to metal machining tool field.Mainly be applicable to the manufacturing of diamond thin-wall drill bit.
Such as diamond thin-wall drill bit, because the superiority of itself, and can significantly improve productivity ratio, and reduce product cost etc., obtained to use more and more widely.Usually diamond thin-wall drill bit is to be combined by diamond bit and steel pipe matrix.
In the prior art, the manufacture method of diamond thin-wall drill bit has two kinds, i.e. thermocompression bonding connection and hot pressing sintering method.
The thermocompression bonding connection is to produce diamond segment by hot press earlier, by high-frequency induction welder cutter head is welded on the steel pipe matrix then, because diamond segment compacting and welding are all slower, therefore production efficiency is very low, and because therefore the at high temperature easy scaling loss of the graphite jig of compacting cutter head causes the tip size deviation bigger, often need more mold exchange, and welding is difficult to guarantee that cutter head is welded on the same circular arc, causes percent defective to increase, and cost increases.The principal character of hot-pressing sintering method is that hot pressed sintering in graphite jig forms with diamond dust and steel pipe matrix, though solved the problem of the different circles of cutter head, but the loss of high-strength graphite mould is very big, cost is very high, and the press time is longer, production efficiency also low (" superhard material and instrument " Guo Zhimeng work, metallurgical industry publishing house, 1996,144-158).
The object of the present invention is to provide the manufacture method of the diamond thin-wall drill bit that a kind of performance is good, efficient is high and production cost is low.
At above-mentioned purpose, the present invention has adopted following technical scheme: at first adopt the diamond thin-wall drill bit mfg. moulding die (application number 99217763.4) of the applicant in first to file, then diamond dust and steel pipe matrix are packed in the former of this mould, and load onto pressure head, then the above-mentioned unitary mould that comprises diamond dust and steel pipe matrix that assembles being put into hydraulic press suppresses, be pressed into the diamond thin-wall drill bit blank that comprises the steel pipe matrix, this diamond thin-wall drill bit blank is put into sintering furnace carry out sintering, after the sintering, promptly become diamond thin-wall drill bit of the present invention.
Now in conjunction with the accompanying drawings, the invention will be further described
Accompanying drawing 1 is the structural representation of the used diamond thin-wall drill bit mfg. moulding die of the present invention.
Found out by accompanying drawing 1, the used diamond thin-wall drill bit mfg. moulding die of the present invention by pressure head 1, former 3, Mould core stripper rings 4, mould core 5 and spacing ring 7 form; Pressure head 1 interlocks with the mould core and matches former 3 places Circle outside pressure head 1, and interlock, mould core stripper rings 4 is in cylindrical and the lower end of former 3, spacing ring 7 are between mould core stripper rings 4 and the former 3. Among the figure, 2 is the diamond powder in addition, and 6 is the steel pipe base Body.
Several vertically from top to bottom grooves are arranged, correspondingly in former 3 in the outside of pressure head 1 The same number of protruding tooth is from top to bottom also arranged on the side.
The technology step of the manufacture method of diamond thin-wall drill bit of the present invention is as follows:
[1] at first the diamond dust 2 for preparing and steel pipe matrix 6 are packed in the former 3 of diamond thin-wall drill bit mould, and load onto pressure head 1;
[2] the above-mentioned unitary mould that comprises diamond dust 2 and steel pipe matrix 6 that assembles is put into hydraulic press and suppress, pressing pressure is 2-5t/cm
2, the dwell time is 1-60 second.During compacting, the double wedge on the groove on the pressure head 1 and the former 3 is the embedding coupling mutually, finally makes to put into former 3 diamond dusts and be pressed into the same number of drill bit blank of the number of teeth and groove and double wedge.
The diamond thin-wall drill bit blank that comprises the steel pipe matrix that [3] will suppress is put into sintering furnace and is carried out sintering, and sintering temperature is 800-1000 ℃, and temperature retention time is 0.5-2.0 hour, feeds reducibility gas or inert gas shielding in the stove.
Behind sintering, promptly become diamond thin-wall drill bit of the present invention.
Compared with prior art, the present invention has following advantage:
(1) adhesion of diamond segment and steel pipe matrix is strong, and in conjunction with firm, drilling life of bit is long.
(2) because this mould is a steel die, die life is more than 5000 times, and the punching block compacting, the production efficiency height, so cost is low, its cost only is 1/20 of thermocompression bonding connection.
(3) with punching block compacting diamond thin-wall drill bit body, so the bit body profile is good, size is accurate, and cutter head and is evenly distributed on same circular arc, and presentation quality is good.
Embodiment
Manufacture method according to diamond thin-wall drill bit of the present invention has prepared three batches of diamond thin-wall drill bits.Grade of steel and size that the specification of three batches of diamond dusts that drill bit adopted, granularity and steel pipe matrix are adopted are as shown in table 1.Diamond dust and steel pipe matrix in the mould for preparing in advance of in batches packing into, are suppressed and sintering after determining then, and compacting and sintering process parameter are as shown in table 2.Sampling respectively after the sinter molding, the performance of three batches of drill bits of test, its result is as shown in table 3.In order to contrast, the identical performance of the diamond thin-wall drill bit of thermocompression bonding same-type that connection obtains and specification is also listed in the table 3.
The diamond dust specification that table 1 embodiment adopts and the grade of steel and the size of steel pipe matrix
Compacting and sintering process parameter that table 2 embodiment adopts
* production cost is 10 to make radix with the cost of hot weld connection, and the unit daily output is 100 to make radix with the daily output of thermocompression bonding connection unit.
Claims (1)
1, a kind of manufacture method of diamond thin-wall drill bit is characterized in that:
[1] at first the diamond dust (2) for preparing and steel pipe matrix (6) are packed in the former (3) of diamond thin-wall drill bit mould, and load onto pressure head (1);
[2] the above-mentioned unitary mould that comprises diamond dust (2) and steel pipe matrix (6) that assembles is put into hydraulic press and suppress, pressing pressure is 2-5t/cm
2, the dwell time is 1-60 second;
The diamond thin-wall drill bit blank that comprises the steel pipe matrix that [3] will suppress is put into sintering furnace and is carried out sintering, and sintering temperature is 800-1000 ℃, and temperature retention time is 0.5-2.0 hour, feeds reducibility gas or inert gas shielding in the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111363 CN1075417C (en) | 1999-08-12 | 1999-08-12 | Method for mfg. of diamond thin-wall drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99111363 CN1075417C (en) | 1999-08-12 | 1999-08-12 | Method for mfg. of diamond thin-wall drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1243053A CN1243053A (en) | 2000-02-02 |
| CN1075417C true CN1075417C (en) | 2001-11-28 |
Family
ID=5275045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99111363 Expired - Fee Related CN1075417C (en) | 1999-08-12 | 1999-08-12 | Method for mfg. of diamond thin-wall drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1075417C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101166608B (en) * | 2005-04-26 | 2012-07-11 | 吉凯恩烧结金属公司 | Improved powder metal processing tool and method of assembly |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446912C (en) * | 2005-02-04 | 2008-12-31 | 阎冠欣 | Technology for making diamond composite sheet drill bit body by hot press method and drill bit body |
| CN102274972B (en) * | 2010-06-13 | 2013-07-17 | 博深工具股份有限公司 | Manufacturing method of annular ultrathin diamond drill bit |
| CN102555274A (en) * | 2011-12-09 | 2012-07-11 | 苏州工业园区高登威科技有限公司 | Hydraulic press |
| CN105537586B (en) * | 2015-12-14 | 2018-02-16 | 中国石油大学(北京) | Processing method, mould and the wear-resistant belt of projective table type diamond composite wear-resistant belt |
| KR102371064B1 (en) | 2016-12-14 | 2022-03-07 | 현대자동차주식회사 | Method for manufacturing endpiece for cam shaft and the endpiece |
| CN107812950B (en) * | 2017-10-30 | 2019-11-05 | 中国有色桂林矿产地质研究院有限公司 | The method that thin diamond wall jacking grooved bit monoblock type bores tooth is prepared using pressureless sintering method |
| CN110756808B (en) * | 2019-12-13 | 2021-09-28 | 哈尔滨工业大学 | Powder increment sintering forming method for complex closed hollow thin-wall part |
| CN115401197B (en) * | 2022-08-17 | 2024-01-23 | 中铁第四勘察设计院集团有限公司 | Diamond-impregnated drill bit manufacturing die, manufacturing method and diamond-impregnated drill bit |
-
1999
- 1999-08-12 CN CN 99111363 patent/CN1075417C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101166608B (en) * | 2005-04-26 | 2012-07-11 | 吉凯恩烧结金属公司 | Improved powder metal processing tool and method of assembly |
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| Publication number | Publication date |
|---|---|
| CN1243053A (en) | 2000-02-02 |
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