CN101264570A - Processing method of full-grinding twist drill after milling groove porcessing and processing positioning device - Google Patents
Processing method of full-grinding twist drill after milling groove porcessing and processing positioning device Download PDFInfo
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- CN101264570A CN101264570A CNA2007100205764A CN200710020576A CN101264570A CN 101264570 A CN101264570 A CN 101264570A CN A2007100205764 A CNA2007100205764 A CN A2007100205764A CN 200710020576 A CN200710020576 A CN 200710020576A CN 101264570 A CN101264570 A CN 101264570A
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Abstract
The invention relates to a processing method and a machining and locating device of all ground twist drill after milling grooves for producing large dimension twist drills, belonging to the technical field of metal cutting tools. The method comprises at least the following steps: a. machining the end part of the bar material to obtain taper shank and flat tail; b. machining the bar material with taper shank and flat tail by common groove milling method to obtain the grooved semi-finished products, the back width of the semi-finished cutting tool and the core thickness of the drilling bit reserve the grinding allowance as compared with the nominal dimension; c. grinding roughly the external circle of the semi-finished product and then grinding the grooves by a groove grinder after completing the heat treatment and the grinding of external circle; d. starting the groove grinder to grind and machine the grooves up to nominal dimension after locating the workpiece. The method and device thereof can be used for producing the large dimension twist drills and enhancing the production efficiency and machining precision at the same time.
Description
Technical field
The invention belongs to the manufacturing technology of metal cutting tool, relate to a kind of processing method and processing and positioning device that is used for complete wear fluted drill after the groove milling that big specification fluted drill makes.
Background technology
The production of fluted drill has the history in more than 100 year, according to the method difference that produces groove, its production technology mainly contain groove milling technology, slot grinding process (less than φ 32mm), plastic deformation process (four rollings, four plates rub with the hands, roll turn round, technology such as extruding), these several production technologies are still adopted widely at present.They respectively have pluses and minuses, slot grinding process is owing to need a large amount of grindings, its production efficiency will be significantly less than groove milling technology, plastic deformation process, but slot grinding process is compared with plastic deformation process with groove milling technology, can obtain higher machining accuracy, thereby along with the raising of machinery system required precision already just must employing to the product of drill bit.
Summary of the invention
Technical problem to be solved by this invention is that a kind of processing method and processing and positioning device that can obtain simultaneously than complete wear fluted drill after the groove milling of high efficiency and machining accuracy is provided.
The processing method of complete wear fluted drill may further comprise the steps at least after the groove milling of the present invention:
A. the bar afterbody is carried out machining, obtain taper shank and tang;
The bar that b. will have taper shank and a tang processes the semi-finished product that have groove with the groove milling method of routine, and half-finished land width is compared with nominal dimension with core thickness of drilling bit and reserved grinding allowance; Before above-mentioned groove milling processing, the bar that has taper shank and tang is positioned, when making groove milling processing beginning, have relative definite axial location, radial position and circumferential angle position between the start-up portion of tang and taper shank and groove with processing and positioning device; The scope of described allowance can be selected between 0.5～0.8mm according to product specification;
C. will process the semi-finished product corase grind cylindrical of groove by the groove milling method, and behind Overheating Treatment, cylindrical grinding, deliver to mill ditch machine then and grind ditch processing;
D. grinding the ditch first being processed, use and the identical device of processing and positioning device described in the above-mentioned steps b, position with axial location, radial position and the circumferential angle position of identical method workpiece, thereby make and have definite initial Working position between groove and the abrasive grinding wheel, clamping work pieces started mill ditch machine then groove was carried out grinding until nominal dimension this moment.
The main body of the processing and positioning device that uses in the inventive method is a collet that has taper hole, the taper shank tapering of the tapering of taper hole and workpiece to be processed adapts, have a flat groove in the bottom of taper hole, the tang thickness of the width of flat groove and workpiece to be processed adapts, and the degree of depth of flat groove and the length of tang adapt.
The fluted drill that adopts processing method of the present invention and processing and positioning device to produce, its advantage applies exists: it has groove milling processing fluted drill advantage on the one hand, that is and, thereby production efficiency is high and the waste utilization rate height is saved a large amount of valuable high-speed steel; It has the advantage of complete wear fluted drill on the other hand, that is, product size precision height, surface roughness is good, borehole accuracy is high, the life-span of boring disperse little, can carry out face coat; In addition, because its stock removal is less, thus brought emery wheel consume little, the crushing number of times reduces, golden steel loss is few, by abrasive drilling head burn alleviate, during grinding oil smoke reduce, to ambient air contamination alleviate, beneficial effect such as machine motor power can reduce, the lathe wearing and tearing alleviate.
Description of drawings
Fig. 1 is the structural representation of processing and positioning device of the present invention.
The specific embodiment
An embodiment of the inventive method and device is as follows:
The processing nominal diameter is the fluted drill of φ 50, the process following steps:
(1) the blank bar is obtained to have the bar of taper shank and tang behind fracture, welding, Vehicle Processing, cylindrical grinding;
(2) bar that will have taper shank and tang carries out groove milling processing, the processing and positioning device of structure shown in Figure 1 is installed on groove milling equipment, after the bar that has taper shank and tang positioned, process the semi-finished product that have groove with the groove milling method, half-finished land width and core thickness of drilling bit are reserved the grinding allowance of 0.8mm;
(3) semi-finished product that have groove after the groove milling are delivered to mill ditch machine behind Overheating Treatment, cylindrical grinding and ground ditch processing;
(4) installing collet that a collet positioner that has a gain uses taper hole additional on common automatic mill ditch machine limits the radial position of workpiece to be processed, axial location to workpiece to be processed after the taper shank tang inserts limits, taper shank tang and groove are matched, thereby the circumferential angle position of groove is limited;
(5) grinding the processing and positioning device that structure shown in Figure 1 is installed on the ditch machine automatically, workpiece after the groove milling is positioned, behind the location, the relative abrasive grinding wheel of workpiece has definite initial Working position, this moment clamping work pieces, start abrasive grinding wheel then groove is carried out grinding, remove grinding allowance until nominal dimension;
After (6) one side trench machined, the lathe calibration was finished the grinding of opposite side groove, obtained final products.
Employed processing and positioning device as shown in Figure 1 in the above-mentioned steps, it is a collet 1 that has taper hole 11, the tapering of the taper shank 21 of the tapering of taper hole and workpiece to be processed 2 adapts, have a flat groove 12 in the bottom of taper hole, the width of flat groove and the tang of workpiece to be processed 22 thickness adapt, and the degree of depth of flat groove and the length of tang adapt.
Its locate mode is: by cooperating of rubber-like taper hole 11 and taper shank 21, the radial position of workpiece to be processed is limited; By the bottom surface of flat groove the tang end is carried out spacingly, make the axial location of the workpiece to be processed of insertion obtain limiting; The tang of workpiece to be processed is inserted, the thickness of taper shank tang and flat groove is matched, thereby the circumferential angle position of workpiece is limited.
Claims (3)
1. the processing method of complete wear fluted drill after the groove milling is characterized in that: may further comprise the steps at least,
A. the bar afterbody is carried out machining, obtain taper shank and tang;
The bar that b. will have taper shank and a tang processes the semi-finished product that have groove with the groove milling method of routine, and half-finished land width is compared with nominal dimension with core thickness of drilling bit and reserved grinding allowance; Before above-mentioned groove milling processing, the bar that has taper shank and tang is positioned, when making groove milling processing beginning, have relative definite axial location, radial position and circumferential angle position between the start-up portion of tang and taper shank and groove with processing and positioning device;
C. will process the semi-finished product corase grind cylindrical of groove by the groove milling method, and behind Overheating Treatment, cylindrical grinding, deliver to mill ditch machine then and grind ditch processing;
D. grinding the ditch first being processed, use and the identical device of processing and positioning device described in the above-mentioned steps b, position with axial location, radial position and the circumferential angle position of identical method workpiece, thereby make and have definite initial Working position between groove and the abrasive grinding wheel, clamping work pieces started mill ditch machine then groove was carried out grinding until nominal dimension this moment.
2. the processing method of complete wear fluted drill after the groove milling according to claim 1 is characterized in that: the scope of the grinding allowance that half-finished land width and core thickness of drilling bit are stayed among the step b is 0.5～0.8mm.
3. the processing and positioning device of complete wear fluted drill after the groove milling, it is characterized in that: this device main body is a collet (1) that has taper hole (11), the taper shank tapering of the tapering of taper hole and workpiece to be processed adapts, have a flat groove (12) in the bottom of taper hole, the tang thickness of the width of flat groove and workpiece to be processed adapts, and the degree of depth of flat groove and the length of tang adapt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100205764A CN101264570A (en) | 2007-03-13 | 2007-03-13 | Processing method of full-grinding twist drill after milling groove porcessing and processing positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100205764A CN101264570A (en) | 2007-03-13 | 2007-03-13 | Processing method of full-grinding twist drill after milling groove porcessing and processing positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101264570A true CN101264570A (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100205764A Pending CN101264570A (en) | 2007-03-13 | 2007-03-13 | Processing method of full-grinding twist drill after milling groove porcessing and processing positioning device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103128520A (en) * | 2013-03-20 | 2013-06-05 | 沈阳飞机工业（集团）有限公司 | Machining method of deep-hole alloy reamer |
| CN105397438A (en) * | 2015-12-31 | 2016-03-16 | 武汉江钻恒立工程钻具股份有限公司 | Manufacture method of way-type drilling unit |
| CN105945545A (en) * | 2016-06-15 | 2016-09-21 | 沈阳飞机工业（集团）有限公司 | Machining method for super-lathy rod expanding drill |
| CN107020486A (en) * | 2017-05-11 | 2017-08-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of welded type lengthened reamer |
| CN111112699A (en) * | 2019-12-25 | 2020-05-08 | 常州机电职业技术学院 | Rotatable twist drill device capable of being positioned |
| CN112846315A (en) * | 2020-12-31 | 2021-05-28 | 苏州用朴精密科技有限公司 | Hard alloy drill bit and machining process thereof |
-
2007
- 2007-03-13 CN CNA2007100205764A patent/CN101264570A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103128520A (en) * | 2013-03-20 | 2013-06-05 | 沈阳飞机工业（集团）有限公司 | Machining method of deep-hole alloy reamer |
| CN105397438A (en) * | 2015-12-31 | 2016-03-16 | 武汉江钻恒立工程钻具股份有限公司 | Manufacture method of way-type drilling unit |
| CN105945545A (en) * | 2016-06-15 | 2016-09-21 | 沈阳飞机工业（集团）有限公司 | Machining method for super-lathy rod expanding drill |
| CN105945545B (en) * | 2016-06-15 | 2018-07-10 | 沈阳飞机工业（集团）有限公司 | A kind of processing method of ultrathin long rod reamer |
| CN107020486A (en) * | 2017-05-11 | 2017-08-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of welded type lengthened reamer |
| CN111112699A (en) * | 2019-12-25 | 2020-05-08 | 常州机电职业技术学院 | Rotatable twist drill device capable of being positioned |
| CN112846315A (en) * | 2020-12-31 | 2021-05-28 | 苏州用朴精密科技有限公司 | Hard alloy drill bit and machining process thereof |
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Open date: 20080917 |