CN102094582B - Processing method of bimetallic oil distributing sleeve for full-hydraulic drilling machine - Google Patents
Processing method of bimetallic oil distributing sleeve for full-hydraulic drilling machine Download PDFInfo
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- CN102094582B CN102094582B CN2010105746049A CN201010574604A CN102094582B CN 102094582 B CN102094582 B CN 102094582B CN 2010105746049 A CN2010105746049 A CN 2010105746049A CN 201010574604 A CN201010574604 A CN 201010574604A CN 102094582 B CN102094582 B CN 102094582B
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Abstract
The invention relates to the field of coal mine gallery drilling machinery, and relates to a floating type bimetallic oil distributing sleeve which is applied on a full-hydraulic power head drilling machine for realizing oil distribution on a hydraulic chuck of the drilling machine and a processing method thereof. Currently, an embedded type coupling mode by mechanical pressing is adopted between a substrate and an inner sleeve of the oil distributing sleeve, hydraulic oil frequently leaks from a coupling gap to make hydraulic transmission efficiency of the drilling machine reduced. The invention aims to develop the bimetallic oil distributing sleeve for the full-hydraulic drilling machine and the processing method thereof. The processing method comprises the steps of developing a PQT (Plumbum Bronze Copper) copper alloy material and compounding the PQT copper alloy material with carbon steel by centrifugally casting and a vacuum-sintering process technology. The invention has the advantages that: the oil distributing sleeve has high wear resistance and seizure resistance, the lead freely distributed in an alloy layer of the PQT copper alloy material plays a role as a boundary lubricant, the frictional coefficient is greatly reduced under the condition of lubrication, and the problems of quick wearing of the oil distributing sleeve, large leakage, easiness in locking of a drawing sleeve and the like are solved.
Description
One, technical field
The present invention relates to the boring mechanic field, is that a kind of novel dual metal that is applied on the all-hydraulic drill is joined oil jacket, and promptly the all-hydraulic drill bimetallic is joined oil jacket and processing method thereof.
Two, background technology
At present, in the work of all-hydraulic power head rig oild chuck, need hydraulic oil be sent into the main shaft of rotation from non-rotary unit head casing through joining oil jacket, the axial oilhole on main shaft arrives chuck again.Join between oil jacket and the main shaft and should allow the high speed relative motion, realize that again pressurize joins oil.The oil jacket of joining of tunnel, colliery all-hydraulic drill wearing and tearing in use occur comparatively fast, causes hydraulic system leakage bigger, causes rig efficient to reduce.Join the inserted connecting mode that adopts machinery to be pressed between oil jacket matrix and the interior cover and hydraulic oil often occurs, make the reduction of rig hydraulicefficiency from connecting the slit leakage.Simultaneously, between matrix and the interior cover because connecting mode limit, be prone to generation and become flexible and pull out the cover phenomenon.
Three, summary of the invention
Leak, pull out deficiencies such as cover in order to overcome lower, the easy generation of oil jacket anti-wear performance of joining that exists in the above-mentioned background technology, the invention provides a kind of all-hydraulic drill bimetallic and join oil jacket and processing method thereof.Improve abrasion resistance and the application life thereof join oil jacket, solve leakage, the cover quick abrasion of joining oil jacket, be prone to locking, pull out problem such as cover.
Solving the technical scheme that its technical problem adopts is:
The all-hydraulic drill bimetallic is joined oil jacket; It is characterized in that: closely being combined as a whole by cover in matrix and the copper alloy and forming, is metallurgical diffusion layer between the cover in matrix and the copper alloy, and joining has distributor port on the oil jacket; (with the radial center is symmetrical centre to be distributed with many groups in the ring; Each is one group together the both sides, center, and many groups refer to many groups balancing slits of making by actual needs, for example can be 3 groups, 4 groups, 5 groups etc.) the ring-type balancing slit.
Make above-mentioned all-hydraulic drill bimetallic and join the processing method of oil jacket, it is characterized in that:
(1) makes cover blank and matrix blank in the copper alloy: on vertical centrifugal-casting machine, overlap blank in the copper alloy of utilization die cast dense structure, high comprehensive performance; The matrix blank is to adopt carbon steel material to process;
(2) make cover bimetallic complex in carbon steel matrix and the copper alloy with the pressurization vacuum sintering technology: cover blank and carbon steel matrix blank form cover and carbon steel matrix in the copper alloy layer after pressing the design drawing preliminary working in the copper alloy; Eliminating stress and removing under the prerequisite of oxide layer; Cover in the copper alloy layer is pressed in the carbon steel substrate ring, is positioned in the vacuum sintering furnace on the support ring iron, vacuum sintering furnace brings into operation; The furnace gas vacuum state of being found time gradually to form, vacuum is 2-3*10
-3Pa; Insulation 10min when body of heater is warming up to 790 ℃; After guaranteeing that object temperature reaches unanimity in the temperature and stove in the stove, hydraulic jack begins pressurization and gives the pressurization core, and is sheathed in respect of the small tapering that cooperates in pressurize core and the copper alloy layer; Tapering is 1:16, forms trickle relative motion; Temperature rises to 890 ℃ in the 40min final vacuum agglomerating furnace stove; Hydraulic jack imposed on the pressure of pressurization on the core and reached 10MPa this moment, closed vacuum sintering furnace after being incubated 60 min, and the pressure that reduces the pressurization oil cylinder gradually is to atmospheric pressure state; Can reach tapping temperature behind 20～40min, workpiece is come out of the stove; Carbon steel matrix and the interior cover of copper alloy that bimetallic is joined oil jacket adopt the organic seam of pressurization vacuum sintering technology, form bimetallic complex workpiece;
(3) fine finishining is processed the all-hydraulic drill bimetallic and is joined oil jacket: will above the workpiece of coming out of the stove utilize special tooling, diamond bit on Digit Control Machine Tool, to carry out fine finishining by drawing; The oil jacket finished product is joined in formation; Its copper alloy layer thickness is not more than 4mm, through putting into storehouse after the assay was approved.
Described all-hydraulic drill bimetallic is joined oil jacket, it is characterized in that: the mass percent that bimetallic is joined the interior cover of new copper alloy (12) composition of oil jacket is C: 9.24%, Ni:2.44～2.68%, Zn:3.3～3.6%, Sn: 5.1～6.5%, Pb:6～7%, surplus are Cu.
Described all-hydraulic drill bimetallic is joined oil jacket, it is characterized in that: can realize joining that oil jacket floats on the symmetric double distributor port of dynamic head main spindle state at work and the ring-type balancing slit of arrangement forms the floating type oil film of perforation under the duty.
Develop in the novel PQT copper alloy and overlap in the alternative traditional tin bronze of cover; Adopt centrifugal casting, pressurization vacuum sintering technology technology; Make cover and the organic seam of Fine Steel Casting iron matrix in the PQT copper alloy, form the bimetallic complex, be processed into by design drawing then and join oil jacket.PQT implication wherein: P refers to lead, and Q refers to bronze, and T refers to copper.
The invention has the beneficial effects as follows:
1, cover in the novel PQT copper alloy has high-wearing feature and seizure resistance, and the free lead that is distributed in the copper alloy layer can play the effect of boundary lubricant, and friction factor significantly reduces under lubricated condition, and performance obviously is superior to traditional tin bronze.
2, cover adopts centrifugal casting technique to make in the PQT copper alloy; Because action of centrifugal force when casting has been improved the feeding condition, gas and nonmetal inclusion also are easy in liquid metals, discharge; The dense structure of the centrifugal casting that obtains, defective such as reduced shrinkage porosite hole, pore, be mingled with; Owing to taked metal mold, get rid of the floating sand problem that sand mold itself is brought simultaneously, improved castability.Novelly join that cover forms with overcoat employing vacuum pressed high temperature sintering in the oil jacket,
3, join solder bond between the interior cover of oil jacket and two kinds of unlike materials of overcoat, formed tangible bimetallic diffusion layer, in conjunction with as a whole, the jail is inseparable.
4, thoroughly eliminated bonding gap between two kinds of different metals that the traditional mechanical embedded structure produced, solved join the oil jacket quick abrasion, leak big, be prone to locking and pull out problems such as cover.
Four, description of drawings
Fig. 1 overlaps sketch map for novel joining in the oil jacket centrifugal casting copper alloy.Fig. 2 is the novel oil jacket sintering sketch map under vacuum, pressurized conditions of joining.Fig. 3 is novel structural representation of joining oil jacket.Fig. 4 is the enlarged drawing of A1 portion among Fig. 3, also is the bimetallic combination layer partial enlarged drawing of joining oil jacket oil leab (balancing slit) and forming.
Label declaration among the above-mentioned figure: 1. casting ladle, 2. casting mold, 3. liquid copper alloy, 4. belt pulley and belt, 5. axis of rotation is 6. analysed and observe the copper alloy blank, 7. motor; 8. hydraulic jack, 9. vacuum sintering furnace, 10. pressurization core, cover in 11. matrixes, 12. copper alloys, 13. support ring iron; 14. distributor port, 15. balancing slits, 16. diffusion layers.
Five, the specific embodiment
Among Fig. 1, be cover sketch map in the centrifugal casting copper alloy, on vertical centrifugal-casting machine, overlap in the utilization die cast copper alloy.Motor 7 rotates through belt pulley and belt 4 driven rotary axles 5; Casting mold 2 fixing on the axis of rotation 5 also rotates thereupon; Casting ladle 1 waters liquid copper alloy 3 and is filled in the casting mold 2 with certain speed and temperature, because action of centrifugal force, liquid copper alloy 3 obtains flowing fully; Filling capacity is strengthened in casting mold 2 die cavities, has formed to organize cover blank 6 in the very fine and close copper alloy.The existence of centrifugal force has simultaneously improved the feeding condition of cover blank 6 in the copper alloy, and gas and impurity also are easy to from liquid, discharge, and what obtain is cover blank 6 in the less copper alloy of foundry goods dense structure, defective.
Among Fig. 2, be to join oil jacket sintering sketch map under vacuum, pressurized conditions.Joining oil jacket is closely fixed by cover 12 in matrix 11 and the copper alloy and forms.In the copper alloy after 6 roughing of cover blank with rough machined 45
# Steel matrix 11 matches, and promptly 45
# Steel matrix 11 overlaps 12 by what form after the design drawing preliminary working with copper alloy layer is interior, is eliminating stress and is removing under the prerequisite of oxide layer, and cover 12 in the copper alloy layer is pressed into 45
# Steel matrix 11 is positioned in the vacuum sintering furnace 9 on the support ring iron 13.Vacuum sintering furnace 9 brings into operation, and furnace gas is found time to form vacuum state gradually, and (vacuum is 2-3*10
-3Pa).Insulation 10min when body of heater is warming up to 790 ℃ guarantees that object temperature reaches unanimity in interior temperature of stove and the stove.The oil cylinder 8 that pressurizes begins pressurization and gives pressurization core 10, and pressurization core 10 is designed with the small tapering (tapering is 1:10, and forming tapering is in order to pressurization condition to be provided) that cooperates with the interior cover 12 of copper alloy layer and forms trickle relative motion.Temperature rises to 890 ℃ in 40min final vacuum agglomerating furnace 9 stoves; The oil cylinder 8 that pressurizes this moment imposes on the pressure of pressurization on the core 10 and reaches 10MPa, closes vacuum sintering furnace 9 after being incubated 60 min, and the pressure that reduces pressurization oil cylinder 8 gradually is to atmospheric pressure state; Can reach tapping temperature behind about 30min, workpiece is come out of the stove.
Among Fig. 3 and Fig. 4, under vacuum, hot conditions, through the pressurization of pressurization oil cylinder, 45
#Produce metallurgical diffusion between the cover 12 in steel matrix 11 and the copper alloy layer, formed tangible diffusion layer 16 (see figure 4)s.45
# Steel matrix 11 combines as a whole, firm inseparable with the interior cover of copper alloy layer 12 two parts through diffusion layer 16.
The interior cover of copper alloy after processing blank 6 is processed bimetallic and is joined the oil jacket base substrate behind sintering under vacuum, the pressurized conditions; After bimetallic is joined the carbon steel matrix and the organic seam of copper alloy interior cover employing pressurization vacuum sintering technology of oil jacket; Utilize special tooling, diamond bit on Digit Control Machine Tool, to process again by drawing; Turning forms balancing slit 15, processes and joins the oil jacket finished product, and its copper alloy layer thickness is not more than 4mm.
Need to prove at last:
1, joins oil jacket and be combined into one through pressurization vacuum-sintering, join oil jacket and be provided with distributor port 14 and many group ring-type balancing slits 15 by cover 12 in matrix 11 and the copper alloy.
2, require bimetallic to join cover composition (mass fraction in the new copper alloy of oil jacket; Be Cu %) for 9.24C, 2.44～2.68 Ni, 3.3～3.6 Zn, 5.1～6.5 Sn, 6～7 Pb, surplus; Adopt metal pattern high speed centrifugation pouring technology to form base substrate, processing makes cover 12 in the copper alloy body.
3, bimetallic is joined oil jacket employing symmetric double distributor port 14 and is organized 15 designs of ring-type balancing slit more, realizes that joining oil jacket floats on the dynamic head main spindle state at work.
4, matrix 11 adopts carbon steel, comprises 45
# Carbon steel such as steel, A3 steel.
Claims (3)
1. an all-hydraulic drill bimetallic is joined the processing method of oil jacket, it is characterized in that:
The all-hydraulic drill bimetallic is joined oil jacket and is closely as one by cover (12) in matrix (11) and the copper alloy and forms; Be metallurgical diffusion layer (16) between the cover (12) in matrix (11) and the copper alloy; Joining has distributor port (14) on the oil jacket, be distributed with ring-type balancing slit (15) in the ring;
The process steps that described all-hydraulic drill bimetallic is joined oil jacket is following:
(1) makes cover blank (6) and matrix (11) blank in the copper alloy: on vertical centrifugal-casting machine, overlap blank (6) in the copper alloy of utilization die cast dense structure, high comprehensive performance; Matrix (11) blank is to adopt carbon steel material to process;
(2) make cover (12) bimetallic complex in carbon steel matrix (11) and the copper alloy with the pressurization vacuum sintering technology: cover blank (6) and carbon steel matrix (11) blank form cover (12) and carbon steel matrix (11) in the copper alloy layer after pressing the design drawing preliminary working in the copper alloy; Eliminating stress and removing under the prerequisite of oxide layer; Cover (12) in the copper alloy layer is pressed in carbon steel matrix (11) ring; Be positioned on the middle support ring iron (13) of vacuum sintering furnace (9); Vacuum sintering furnace (9) brings into operation, the furnace gas vacuum state of being found time gradually to form, and vacuum is 2-3*10
-3Pa; Insulation 10min when body of heater is warming up to 790 ℃; After guaranteeing that object temperature reaches unanimity in interior temperature of stove and the stove; Hydraulic jack (8) begins pressurization and gives pressurization core (10); Pressurization core (10) is designed with the small tapering that cooperates with the interior cover of copper alloy layer (12), and tapering is 1:10, forms trickle relative motion; Temperature rises to 890 ℃ in 40min final vacuum agglomerating furnace (9) stove; The pressure that hydraulic jack this moment (8) imposes on the pressurization core (10) reaches 10MPa; Close vacuum sintering furnace (9) after being incubated 60 min; The pressure that reduces pressurization oil cylinder (8) gradually can reach tapping temperature to atmospheric pressure state behind 20～40min, and workpiece is come out of the stove; The carbon steel matrix (11) that bimetallic is joined oil jacket adopts the organic seam of pressurization vacuum sintering technology with the interior cover of copper alloy (12), forms bimetallic complex workpiece;
(3) fine finishining is processed the all-hydraulic drill bimetallic and is joined oil jacket: will above the workpiece of coming out of the stove utilize special tooling, diamond bit on Digit Control Machine Tool, to carry out fine finishining by drawing; The oil jacket finished product is joined in formation; Its copper alloy layer thickness is not more than 4mm, through putting into storehouse after the assay was approved.
2. all-hydraulic drill bimetallic according to claim 1 is joined the processing method of oil jacket, it is characterized in that: the mass percent that bimetallic is joined the interior cover of new copper alloy (12) composition of oil jacket is C: 9.24%, Ni:2.44～2.68%, Zn:3.3～3.6%, Sn: 5.1～6.5%, Pb:6～7%, surplus are Cu.
3. all-hydraulic drill bimetallic according to claim 1 is joined the processing method of oil jacket, it is characterized in that: can realize joining that oil jacket floats on the symmetric double distributor port (14) of dynamic head main spindle state at work and the ring-type balancing slit (15) arranged forms the floating type oil film of perforation under the duty.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102935584B (en) * | 2012-11-21 | 2014-11-05 | 武汉船用机械有限责任公司 | Method for machining oil distributor shell |
| CN105672871A (en) * | 2016-04-07 | 2016-06-15 | 陕西太合科技有限公司 | All-hydraulic drill power head with rear-mounted floating-ring |
| CN109396397A (en) * | 2018-12-26 | 2019-03-01 | 中煤科工集团重庆研究院有限公司 | All-hydraulic drill three-decker matches the processing method of oil jacket |
| CN110732656B (en) * | 2019-10-21 | 2021-06-29 | 大连船用柴油机有限公司 | White alloy casting method and tool for crosshead slide block of large low-speed marine diesel engine |
| CN116752904B (en) * | 2023-06-26 | 2024-03-08 | 徐州徐工基础工程机械有限公司 | Double-layer structured drill shank and rotary system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034239Y (en) * | 2007-02-07 | 2008-03-12 | 山东天成阀门制造有限公司 | Copper steel bimetal multiple tube/steel bar |
| CN101210631A (en) * | 2006-12-27 | 2008-07-02 | 徐学新 | Gyration type hydraulic operated valve |
| CN101352800A (en) * | 2008-09-10 | 2009-01-28 | 南京高精船用设备有限公司 | Technique for processing oil distribution sleeve in adjustable windstick distributor for marine |
| CN201362358Y (en) * | 2009-02-20 | 2009-12-16 | 南京高精船用设备有限公司 | Oil distributor of adjustable propeller |
| CN201902162U (en) * | 2010-12-06 | 2011-07-20 | 煤炭科学研究总院西安研究院 | Bimetal oil distribution sleeve for full hydraulic drilling machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333850B4 (en) * | 2003-07-24 | 2005-11-17 | Muhr Und Bender Kg | Built camshaft with camshaft adjuster |
-
2010
- 2010-12-06 CN CN2010105746049A patent/CN102094582B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210631A (en) * | 2006-12-27 | 2008-07-02 | 徐学新 | Gyration type hydraulic operated valve |
| CN201034239Y (en) * | 2007-02-07 | 2008-03-12 | 山东天成阀门制造有限公司 | Copper steel bimetal multiple tube/steel bar |
| CN101352800A (en) * | 2008-09-10 | 2009-01-28 | 南京高精船用设备有限公司 | Technique for processing oil distribution sleeve in adjustable windstick distributor for marine |
| CN201362358Y (en) * | 2009-02-20 | 2009-12-16 | 南京高精船用设备有限公司 | Oil distributor of adjustable propeller |
| CN201902162U (en) * | 2010-12-06 | 2011-07-20 | 煤炭科学研究总院西安研究院 | Bimetal oil distribution sleeve for full hydraulic drilling machine |
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