CN105057737A - Discontinuous deep hole drilling guide device - Google Patents
Discontinuous deep hole drilling guide device Download PDFInfo
- Publication number
- CN105057737A CN105057737A CN201510456813.6A CN201510456813A CN105057737A CN 105057737 A CN105057737 A CN 105057737A CN 201510456813 A CN201510456813 A CN 201510456813A CN 105057737 A CN105057737 A CN 105057737A
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- China
- Prior art keywords
- hole
- limiting plate
- locating shaft
- processed
- drill bushing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/02—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/02—Boring templates or bushings
Abstract
The invention discloses a discontinuous deep hole drilling guide device. The discontinuous deep hole drilling guide device comprises a limiting plate, a first locating shaft, a second locating shaft and a drill bushing. The first locating shaft moveably penetrates through a first installation hole in the limiting plate. The second locating shaft is fixed into a second installation hole in the limiting plate through a locating pin. The drill bushing is detachably installed on the second locating shaft. The two locating shafts are used for locating a plunger hole and an upper hole of a part. A cutter is arranged in the drill bushing. The distance between the end face of the limiting plate and the center of the drill bushing meets the formula that L= m-n, wherein m is the distance between the attachment face between a part to be machined and the limiting plate and the center of a cam shaft hole, and n is the distance between the part to be machined and the attachment face of the limiting plate and the center of the drill bushing. By the adoption of the discontinuous deep hole drilling guide device, according to the structural features of the part to be machined, the locating shafts and the limiting plate are designed to be combined, the discontinuous deep hole drilling guide device is good in perpendicularity of deep hole machining, high in machining efficiency and precision, easy to operate, high in reliability, low in cost and suitable for batch machining of deep holes of parts.
Description
Technical field
The invention belongs to Deep-Hole Drilling Technology field, relate to a kind of interrupted gun drilling guiding device.
Background technology
Certain model oil injection pump of high-power diesel engine body belongs to frame-type complex casing part, the interrupted long deep hole that a diameter is φ 6mm, degree of depth 594mm is processed in designing requirement at plunger hole place, this Kong Yaoyu 12 φ 23 plunger holes are through, according to dimension chain calculating, the distance of center, φ 6 hole and plunger hole top φ 27 bore edges end face is 4.65mm ~ 5.35mm, and its holes Wall-Thickness Difference is only 2.325mm ~ 2.665mm.Former processing scheme employing process equipment is radial drilling machine, cutter is lengthening spiral bit, from the two ends drilling processing respectively of fuel injection pump housing.Deep hole designing requirement and processing scheme to be shown in Fig. 1 shown in a figure and b figure.
Composition graphs 1 is analyzed, and adopts the major technique defect of original processing scheme, is because φ 6 drill bit is interrupted drilling, tool nose and φ 23 hole are arc contact, when getting into second φ 23 hole, cutter is easy to when not feeling relieved spacing bore partially, along with the degree of depth of interrupted drilling increases, bit central offsets gradually, cause the bottom face in φ 6 hole and φ 27 hole to run through, cause part rejection, Product processing qualification rate is only 10%, the time 30min of a processing product, efficiency is low, the cycle is long.This process technology has not only had a strong impact on product development progress, and cannot meet the demand that product processing quality and lean research and develop.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: provide a kind of interrupted gun drilling guiding device, part design itself structure is utilized to position, realize the interrupted long deep hole machining of oil injection pump of high-power diesel engine body, improve deep hole machining efficiency and quality, meet batch production requirements.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of interrupted gun drilling guiding device, it comprises:
Limiting plate, it offers the first installing hole and the second installing hole, and the second mounting hole site is in the top of the first installing hole, and the center of two installing holes lays respectively on the central axis of limiting plate;
First locating shaft, its diameter is consistent with the plunger hole upper hole diameter of big L/D ratio deep hole to be processed, and for the location of part plunger hole upper hole to be processed, the first locating shaft through the first installing hole, and can slide in the first installing hole;
Second locating shaft, its diameter is consistent with the plunger hole diameter of big L/D ratio deep hole to be processed, and for the location of part plunger hole to be processed, the second locating shaft through the second installing hole, and is fixed on limiting plate by alignment pin by the second locating shaft;
Drill bushing, is removably mounted on the second locating shaft, and through the cutter for processing big L/D ratio deep hole to be processed in it, the diameter of drill bushing centre bore is consistent with big L/D ratio deep hole diameter to be processed;
The distance L=m-n at described limiting plate end face and drill bushing center, wherein m is the binding face of part to be processed and limiting plate and the distance at camshaft hole center, and n is the binding face of part to be processed and limiting plate and the distance at drill bushing center.
Wherein, described first locating shaft and limiting plate adopt carbon steel to make, heat treatment 28 ~ 32HRC; Second locating shaft adopts carbon tool steel to make, heat treatment 58 ~ 62HRC.
Wherein, the diameter of described first locating shaft is 27mm, the diameter of the second locating shaft is 23mm, the center-hole diameter of drill bushing is 6mm, the binding face of part to be processed and limiting plate and the distance at camshaft hole center are 217mm, the binding face of part to be processed and limiting plate and the distance at drill bushing center are 144mm, and the distance of the central axis distance limiting plate end face of drill bushing centre bore is (73 ± 0.02) mm.
(3) beneficial effect
The interrupted gun drilling guiding device that technique scheme provides, according to the design feature of part to be processed, devises and combines to realize deep hole machining perpendicularity well, the guiding device that working (machining) efficiency is high, precision is high by locating shaft and limiting plate; Guiding device is simple to operate, reliability is strong, cost is low, is applicable to the batch machining of part deep-hole.
Accompanying drawing explanation
Fig. 1 is the design of fuel injection pump housing deep hole and processing scheme schematic diagram in prior art;
Fig. 2 is the structural representation of the interrupted gun drilling guiding device of the embodiment of the present invention.
In figure, 1-limiting plate; 2-alignment pin; 3-first locating shaft; 4-drill bushing; 5-second locating shaft.
Detailed description of the invention
For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
According to Element Design structure and precision analysis, coordinate basis and φ 27 hole, φ 23 hole of the design of φ 6 hole are identical, and all at camshaft hole center, the special fixture positioning datum of routine should be consistent with design basis.If there is the shortcomings such as clamp structure complexity, inconvenient operation with camshaft hole Position Design fixture.According to Usability analysis, fuel injection pump housing upper surface and φ 27 hole and φ 23 hole are that work in-process heart clamped one time completes processing, the design basis of fuel injection pump housing small end face coordinate dimension is in fuel injection pump housing lower surface, by dimension chain calculating and control, can determine that fuel injection pump housing small end face is 217 ± 0.05mm to the process at camshaft hole center, center, φ 6 hole is 73 ± 0.15mm to the process of fuel injection pump housing small end face, thus utilize φ 27 hole and φ 23 hole and fuel injection pump housing upper surface to locate, the fixture of design is conducive to the requirement ensureing φ 6 hole and φ 27 bore edges end face Wall-Thickness Difference.
According to above analysis, with reference to shown in Fig. 2, the interrupted gun drilling guiding device of the present embodiment comprises limiting plate 1, first locating shaft 3, second locating shaft 5, alignment pin 2 and drill bushing 4.
Limiting plate 1, it offers the first installing hole and the second installing hole, and the second mounting hole site is in the top of the first installing hole, and the center of two installing holes lays respectively on the central axis of limiting plate 1;
First locating shaft 3, its diameter is consistent with the plunger hole upper hole diameter of big L/D ratio deep hole to be processed, and center, hole and this upper hole edge end face of big L/D ratio deep hole to be processed are close, and holes Wall-Thickness Difference is less; In the present embodiment, the first locating shaft 3 diameter is φ 27, and for the location in part φ 27 hole to be processed, the first locating shaft 3 through the first installing hole, and can slide in the first installing hole, and the clamping realizing the first locating shaft 3 is quick and easy.
Second locating shaft 5, its diameter is consistent with the plunger hole diameter of big L/D ratio deep hole to be processed, in the present embodiment, the second locating shaft 5 diameter is φ 23, for the location in part φ 23 hole to be processed, second locating shaft 5 through the second installing hole, and is fixed on limiting plate 1 by alignment pin 2 by the second locating shaft 5; By the connected mode of alignment pin 2 between second locating shaft 5 and limiting plate 1, it is the key ensureing drill bushing central perpendicularity.
Drill bushing 4, is removably mounted on the second locating shaft 5, and through the cutter for processing big L/D ratio deep hole to be processed in it, the diameter of drill bushing 4 centre bore is consistent with big L/D ratio deep hole diameter to be processed, and in the present embodiment, its diameter is φ 6.
In the present embodiment, according to design of part size design, because the wall thickness between φ 27 hole on φ 23 plunger hole top and big L/D ratio deep hole to be processed is less, if there is axial dipole field in big L/D ratio deep hole machining process, then there will be the phenomenon that φ 27 hole drill is worn, so in guiding device, the range accuracy at limiting plate end face and drill bushing center is the key of the directly interrupted long deep hole positional precision of impact.For the part of different size, the distance L=m-n at limiting plate end face and drill bushing center, wherein m is the binding face of part to be processed and limiting plate and the distance at camshaft hole center, and n is the binding face of part to be processed and limiting plate and the distance at drill bushing center.
Based on the concrete structure design in the present embodiment, the process of calculation analysis following (unit of following parameter is mm) of above-mentioned L:
Analyze from part drawing 1, part upper surface (i.e. the binding face of part and limiting plate) belongs to process to the distance at camshaft hole center, and (this is of a size of associative ring, and part total height 275 has just become closed-loop), be designed to 217 ± 0.05, from set up 217 ± 0.05,144 ± 0.2 and
center, hole is to the dimension-chain analysis of part end face (right flank of Fig. 1) distance, and 144 ± 0.2 is closed-loop, and 217 ± 0.05 for increasing ring,
center, hole for subtracting ring, adopts Process Dimension Chain Calculating (maximin method) as follows to part end face (right flank of Fig. 1) distance:
(1) gained is calculated according to " closed-loop basic size=increasing ring basic size-subtract ring basic size ",
center, hole is 217-144=73 to the basic size of part end face (right flank of Fig. 1);
(2) gained is calculated according to " closed-loop lower deviation=increasing ring lower deviation-subtract ring lower deviation " again,
center, hole is to the basic size upper deviation=-0.05+0.2=+0.15 of part end face (right flank of Fig. 1);
(3) gained is calculated according to the closed-loop upper deviation=increasing ring upper deviation-subtract ring lower deviation again,
center, hole is to the basic size lower deviation=0.05-0.2=-0.15 of part end face (right flank of Fig. 1);
(4) namely
center, hole is 73 ± 0.15 to part end face (right flank of Fig. 1) distance, gets 1/3 of actual size tolerance value according to jig Design principle, but considers
hole bottom face, to camshaft hole scale error situation, ensures to more be added with pin
deep hole with
wall-Thickness Difference 2.325mm ~ 2.665mm requirement of hole bottom face, by fixture
drill bushing center is designed to 73 ± 0.02 to the distance of limiting plate medial surface.
Based on above-mentioned concrete structure and size design, the present embodiment guiding device appearance and size is 150mm × 60mm × 100mm, and volume is little, and structure is simple.First locating shaft 3 and limiting plate 1 adopt carbon steel to make, heat treatment 28 ~ 32HRC, low cost of manufacture, good economy performance.In order to improve precision stability and the service life of the second locating shaft 5, it adopts quality carbon tool steel to make, heat treatment 58 ~ 62HRC, devises φ 6 drill bushing that can change simultaneously, further increases service life and the functional reliability of guiding device on the second locating shaft 5.
The process using the present embodiment guiding device to carry out big L/D ratio deep hole machining is: the vertical clamping of part to be processed on the table, second locating shaft 5 is loaded in first φ 23 plunger hole of part, limiting plate 1 is adjacent to part end face, and inserts in φ 27 hole of part by the first locating shaft 3; Then cutter is loaded in drill bushing 4, use cutter deep hole processing vertically downward; By the evolution of guiding device two locating shafts in hole in piece part, realize cutter ensure that deep hole positional precision by the spacing drill bushing of the second locating shaft, man-hour is added when batch carries out part deep-hole, many cover guiding device clamped one times can be adopted to process well simultaneously, reduce the replacing construction of guiding device position, enhance productivity.
As can be seen from the above technical solutions, the design feature that the present invention utilizes part to be processed itself to design, have developed simple to operate, that reliability is strong, cost is low suitability guiding device dexterously, achieve the big L/D ratio deep hole machining that the long aperture of 594mm and end face Wall-Thickness Difference are only the interrupted drilling of 2.325mm ~ 2.665mm, its deep hole processing technology method has certain originality and advance.
By producing checking, this guiding device is easy to use, and clamping is rapid, registration, not only ensure that interrupted big L/D ratio deep hole machining qualification rate 100%, and production efficiency rose to 0.25 hour in 0.5 hour by originally processing one, on original basis, working (machining) efficiency improves 50%.This invention be applied to all this structures of high-power diesel engine in-line fuel injection pump body batch production, only percent defective aspect year save loss can reach 99.4 ten thousand yuan.The invention of this kind of interrupted big L/D ratio deep hole drilling apparatus, the part manufacture of the fuel injection pump housing or homogeneous structure that are not only other model diesel engine provides technological borrowing, and the homogeneous structure part that can be future diesel machine provides technological reserve.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (3)
1. an interrupted gun drilling guiding device, is characterized in that, comprising:
Limiting plate, it offers the first installing hole and the second installing hole, and the second mounting hole site is in the top of the first installing hole, and the center of two installing holes lays respectively on the central axis of limiting plate;
First locating shaft, its diameter is consistent with the plunger hole upper hole diameter of big L/D ratio deep hole to be processed, and for the location of part plunger hole upper hole to be processed, the first locating shaft through the first installing hole, and can slide in the first installing hole;
Second locating shaft, its diameter is consistent with the plunger hole diameter of big L/D ratio deep hole to be processed, and for the location of part plunger hole to be processed, the second locating shaft through the second installing hole, and is fixed on limiting plate by alignment pin by the second locating shaft;
Drill bushing, is removably mounted on the second locating shaft, and through the cutter for processing big L/D ratio deep hole to be processed in it, the diameter of drill bushing centre bore is consistent with big L/D ratio deep hole diameter to be processed;
The distance L=m-n at described limiting plate end face and drill bushing center, wherein m is the binding face of part to be processed and limiting plate and the distance at camshaft hole center, and n is the binding face of part to be processed and limiting plate and the distance at drill bushing center.
2. interrupted gun drilling guiding device as claimed in claim 1, is characterized in that, described first locating shaft and limiting plate adopt carbon steel to make, heat treatment 28 ~ 32HRC; Second locating shaft adopts carbon tool steel to make, heat treatment 58 ~ 62HRC.
3. interrupted gun drilling guiding device as claimed in claim 1, it is characterized in that, the diameter of described first locating shaft is 27mm, the diameter of the second locating shaft is 23mm, the center-hole diameter of drill bushing is 6mm, the binding face of part to be processed and limiting plate and the distance at camshaft hole center are 217mm, and the binding face of part to be processed and limiting plate and the distance at drill bushing center are 144mm, and the distance of the central axis distance limiting plate end face of drill bushing centre bore is (73 ± 0.02) mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456813.6A CN105057737B (en) | 2015-07-29 | 2015-07-29 | A kind of discontinuously gun drilling guide device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510456813.6A CN105057737B (en) | 2015-07-29 | 2015-07-29 | A kind of discontinuously gun drilling guide device |
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| Publication Number | Publication Date |
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| CN105057737A true CN105057737A (en) | 2015-11-18 |
| CN105057737B CN105057737B (en) | 2018-02-06 |
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| CN201510456813.6A Active CN105057737B (en) | 2015-07-29 | 2015-07-29 | A kind of discontinuously gun drilling guide device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386079A (en) * | 2008-10-06 | 2009-03-18 | 溧阳市科华机械制造有限公司 | Drilling jig for drilling deep hole on medium-thickness reinforcement bar in vacuum pump |
| CN201505824U (en) * | 2009-09-15 | 2010-06-16 | 中煤张家口煤矿机械有限责任公司 | Positioning and clamping device for rail support bent plate boreholes |
| CN201632856U (en) * | 2010-03-31 | 2010-11-17 | 温州市冠盛汽车零部件集团股份有限公司 | Drilling special fixture for slippage universal joint |
| CN202447720U (en) * | 2011-10-21 | 2012-09-26 | 苏州中鼎冶金有限公司 | Drilling jig for interlocking shifting block |
| CN203171352U (en) * | 2013-03-12 | 2013-09-04 | 徐州工程学院 | Machining fixture for radial holes evenly distributed in circumference |
-
2015
- 2015-07-29 CN CN201510456813.6A patent/CN105057737B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386079A (en) * | 2008-10-06 | 2009-03-18 | 溧阳市科华机械制造有限公司 | Drilling jig for drilling deep hole on medium-thickness reinforcement bar in vacuum pump |
| CN201505824U (en) * | 2009-09-15 | 2010-06-16 | 中煤张家口煤矿机械有限责任公司 | Positioning and clamping device for rail support bent plate boreholes |
| CN201632856U (en) * | 2010-03-31 | 2010-11-17 | 温州市冠盛汽车零部件集团股份有限公司 | Drilling special fixture for slippage universal joint |
| CN202447720U (en) * | 2011-10-21 | 2012-09-26 | 苏州中鼎冶金有限公司 | Drilling jig for interlocking shifting block |
| CN203171352U (en) * | 2013-03-12 | 2013-09-04 | 徐州工程学院 | Machining fixture for radial holes evenly distributed in circumference |
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| CN105057737B (en) | 2018-02-06 |
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