CN202316977U - Rotary pull-down device for directional solidification of high-temperature alloy - Google Patents
Rotary pull-down device for directional solidification of high-temperature alloy Download PDFInfo
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- CN202316977U CN202316977U CN2011204149869U CN201120414986U CN202316977U CN 202316977 U CN202316977 U CN 202316977U CN 2011204149869 U CN2011204149869 U CN 2011204149869U CN 201120414986 U CN201120414986 U CN 201120414986U CN 202316977 U CN202316977 U CN 202316977U
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- directional solidification
- pull bar
- movable block
- pull
- temperature alloy
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Abstract
The utility model discloses a rotary pull-down device for directional solidification of a high-temperature alloy. The device comprises at least four guide rods which are parallel to one another and are vertically arranged, and the two ends of each of the guide rod are connected with an upper fixing plate and a bottom fixing plate respectively. A moving block moves up and down along the guide rod; a directional solidification pull rod passes through the upper fixing plate and the moving block and is movably connected with the moving block through a pull rod rotation mechanism; the moving block does not generate relative slip along the axial direction of the directional solidification pull rod; a screw rod parallel to the guide rod also passes through the upper fixing plate and the moving block; the screw rod and the moving block are connected through a screw thread pair; the tail part of the bottom end of the screw rod is rotatably connected with the bottom fixing plate through a bearing; the head part of the upper end of the screw rod is fixedly connected with a transmission spindle of a pull rod traction motor; and a transmission spindle of a pull rod rotation motor drives the directional solidification pull rod to rotate. The device disclosed by the utility model realizes rotation at the time of original down pulling in the directional solidification process, and eliminates radial temperature gradient so as to straighten the curved liquid-solid interface, reduce defects and improve efficiency.
Description
Technical field
The utility model relates to a kind of pull device of high temperature alloy directional solidification, is applicable to the control of crystal growth pattern, belongs to technical field of metal material preparation.
Background technology
Compare with the equiax crystal foundry goods blade that the conventional cast method obtains; The elevated temperature strength of directionally solidified superalloy, DS superalloy column crystal and single crystal blade, creep resistant and enduring quality, thermal fatigue property are greatly improved, and become the use first-selection and the development trend of advanced in recent years aviation and gas engine important spare part.
But because design of alloy and control of process parameters problem; Number of drawbacks such as directional solidification single crystal super alloy foundry goods possibly occur that freckle, low-angle boundary, subgrain, dendrite are dispersed, recrystal grain and shrinkage porosite; Reduce its yield rate, had a strong impact on its serviceability.Liquid-solid boundary crooked in the directional solidification process can be aggravated the formation of these defectives.When the freezing interface was protruding interface, foundry goods absorbed the side direction hot-fluid, and directed tissue is outwards dispersed, and the dried foundry goods geometric center degree that departs from of dendrite increases, and stray crystal forms probability and increases; When the interface is concavity, foundry goods will have the side direction hot-fluid to get rid of, and inwardly organize and shrink, and not only cause crystallographic axis to deflect, and cause that interdendritic free convection strengthens, and freckle forms probability and increases, the interdendritic shrinkage property enhancing at edge.Straight solid liquid interface can derive the heat of alloy melt from single direction perpendicular to the interface, helped reducing the formation of defective.
Single crystal super alloy thermograde and freezing rate in directional solidification are in dynamic variation; Make liquid-solid boundary be difficult to keep flat shape; And the complex-shaped especially turbo blade of foundry goods; At the position of shape sudden change, more aggravated the formation at protruding or recessed interface, also become numerous defectives and produce part.For producing high-quality product satisfying the demand of modern industry, Recent study person has developed technology such as liquid metal cooling, area electron beam be molten and has improved thermograde and cooldown rate in the directional solidification, to eliminate these defectives.The device of existing control crystal growth pattern is complex structure mostly, and is wayward, and effect is also not ideal enough.
The utility model content
The purpose of the utility model is to overcome the not enough of prior art and a kind of rotation pull device that is used for the high temperature alloy directional solidification is provided; Under the situation that does not change original longitudinal temperature gradient and freezing rate; Make the directional solidification pull bar when descending, can also rotate, eliminate radial symmetry gradient; Make and the freezing interface straightened reduce the formation of defective.
For reaching the foregoing invention purpose, the present invention adopts following technical proposals:
A kind of rotation pull device that is used for the high temperature alloy directional solidification; Comprise device support stand; Device support stand comprises the guide post that has four parallel to each other and vertical settings at least; The apical support of guide post also is fixedly connected a top tie plate, and the bottom of guide post is fixedly connected on a bottom fixed board, the setting parallel to each other of top tie plate and bottom fixed board.A movable block is installed on guide post; Movable block moves up and down along guide post, and the directional solidification pull bar of drop-down metal freezing strand also laterally arranges with guide post, and top tie plate and movable block are passed in the bottom of directional solidification pull bar; Directional solidification pull bar and movable block flexibly connect through the pull bar rotating mechanism; Movable block slides along the axial nothing of directional solidification pull bar relatively, and promptly movable block moves down along guide post and promptly draws the drop-down ingot casting of directional solidification pull bar, and a rhizoid bar parallel with guide post also passes top tie plate and movable block; Screw mandrel is connected through screw thread pair with movable block; The bottom afterbody of screw mandrel is rotationally connected through first spring bearing and bottom fixed board, and screw mandrel also is rotationally connected through second spring bearing and top tie plate, and the upper end head of screw mandrel is fixedly connected with the transmission main shaft of pull bar traction electric machine; The pull bar traction electric machine is fixed on the top tie plate; Movable block is fixedly connected with the pull bar electric rotating machine through fixture, and the pull bar electric rotating machine is positioned at the movable block below, and the transmission main shaft of pull bar electric rotating machine drives the directional solidification pull bar and rotates.
Above-mentioned pull bar rotating mechanism comprises that is embedded in a sleeve, and the two ends up and down of sleeve closely contact with the outer ring of two thrust ball bearings respectively, and the inner ring side and the sleeve lining of two thrust ball bearings surround the cavity that the directional solidification pull bar passes.
The downward overhanging end capitiform that movable block is passed in the bottom of above-mentioned directional solidification pull bar becomes pull bar by driving end, and the pull bar electric rotating machine is rotated by driving end and then drive directional solidification pull bar through space conical gear drive drive stay.
Major diameter bevel gear in the above-mentioned conical gear drive preferably is fixedly connected by driving end with pull bar.
The said apparatus bracing frame comprises four guide posts.
The preferred DC servo motor of above-mentioned pull bar electric rotating machine.
Above-mentioned thrust ball bearing, first spring bearing and second spring bearing all preferably adopt no gap bearing.
Above-mentioned first spring bearing and second spring bearing all preferably adopt cylinder roller bearing.
The utility model has following substantive distinguishing features and advantage compared with prior art:
1. the utility model is used for the movable block and the screw mandrel interlock of the rotation pull device of high temperature alloy directional solidification; Played fixing effect; And let 4 vertical guide posts pass through, and guarantee the lubricity between movable block and the guide post, just can be allowed to condition on the vertical direction and freely move downwards.Fixing motor on movable block moves down above that and can drive simultaneously motor moving up and down, the bevel gear that is overlapping above the motor so just can keep constantly with pull bar on the bevel gear that overlapping mesh.
2. the utility model has utilized thrust ball bearing, because in doing the directional solidification process of high temperature alloy, pull bar can receive the pressure of very big vertical direction, utilizes thrust ball bearing just can guarantee that pull bar when bearing big load, can rotate freely.In addition, when carrying out the directional solidification of high temperature alloy, guarantee that the vibrations of pull bar are as much as possible little, load onto two the same thrust ball bearings, guarantee the stability of pull bar at the different parts of pull bar.
3. the utility model has been installed two independent motor, opens the motor that is connected with screw mandrel, and regulates its speed, just can drive the rotation of screw mandrel, and meanwhile movable block will move down; Open and regulate being fixed on the motor on the movable block, just can drive the rotation of pull bar, realized independent operation between the two.
4. the utility model can independently be realized rotation and drop-down two actions of pull bar, and liquid-solid boundary levels off to planar interface in the time of making high temperature alloy directed, reduces defective, makes sample under higher pulling rate, also can realize plane interface growth, has improved production efficiency.In addition, device is simple, and convenient disassembly is simple to operate.
Description of drawings
Fig. 1 is the rotation pull device structural representation that the utility model is used for the high temperature alloy directional solidification.
The specific embodiment
The preferred embodiment accompanying drawings of the utility model is following:
Embodiment one:
Referring to Fig. 1; A kind of rotation pull device that is used for the high temperature alloy directional solidification; Comprise device support stand, device support stand comprises the guide post 3 that has four parallel to each other and vertical settings at least, and the apical support of guide post 3 also is fixedly connected a top tie plate 2; The bottom of guide post 3 is fixedly connected on a bottom fixed board 6, top tie plate 2 and bottom fixed board 6 settings parallel to each other.A movable block 4 is installed on guide post 3; Movable block 4 moves up and down along guide post 3, and the directional solidification pull bar 1 of drop-down metal freezing strand also laterally arranges with guide post 3, and top tie plate 2 and movable block 4 are passed in the bottom of directional solidification pull bar 1; Directional solidification pull bar 1 flexibly connects through the pull bar rotating mechanism with movable block 4; Movable block 4 slides along the axial nothing of directional solidification pull bar 1 relatively, and promptly movable block 4 moves down along guide post 3 and promptly draws directional solidification pull bar 1 drop-down ingot casting, also passes top tie plate 2 and movable block 4 with guide post 3 parallel rhizoid bars 9; Screw mandrel 9 and movable block 4 are connected through screw thread pair; The bottom afterbody of screw mandrel 9 is through first spring bearing 15 and bottom fixed board 6) be rotationally connected, screw mandrel 9 also is rotationally connected with top tie plate 2 through second spring bearing 8, and the upper end head of screw mandrel 9 is fixedly connected with the transmission main shaft of pull bar traction electric machine 7; Pull bar traction electric machine 7 is fixed on the top tie plate 2; Movable block 4 is fixedly connected with pull bar electric rotating machine 5 through fixture 14, and pull bar electric rotating machine 5 is positioned at movable block 4 belows, and the transmission main shaft of pull bar electric rotating machine 5 drives directional solidification pull bar 1 and rotates.In the present embodiment; Being installed in pull bar traction electric machine 7 on the top tie plate 2 will rotatablely move and be passed to leading screw 9; Movable block 4 realizes that through guide post 3 guiding pull bar electric rotating machine 5, directional solidification pull bar 1 connect with movable block 4 along the guide rail rectilinear motion; When descending, accomplish rotatablely moving of rotating shaft with movable block 4.In order to obtain highly reliably, to move stably, pull bar traction electric machine 7 and leading screw 9 associated modes have been adopted.This device can make in the high temperature alloy directional solidification process original and realize rotation in drop-down; Make the liquid phase and the solid phase at place, freezing interface be subjected to displacement fricting movement; Eliminate thermograde radially, form, make crooked liquid-solid boundary straightened along the single thermograde of casting flow path direction; Reduce the formation of defective, raise the efficiency.
In the present embodiment; Above-mentioned pull bar rotating mechanism comprises that is embedded in a sleeve 11; The two ends up and down of sleeve 11 closely contact with the outer ring of two thrust ball bearings 10,12 respectively, and the inner ring side of two thrust ball bearings 10,12 and sleeve 11 inwalls surround the cavity that directional solidification pull bar 1 passes.When carrying out the test of high temperature alloy directional solidification; With stretching whirligig horizontal fixed; Passing movable block 4 through two thrust ball bearings 10,12 and the directional solidification pull bar 1 that overlaps upper bush 11 realizes fixing; Open pull bar traction electric machine 7, regulate the speed of rotation and drive screw mandrel 9 rotated, movable block 4 can integral body move up and down during rotation.Open pull bar electric rotating machine 5, regulate the speed of rotating, make of the action of directional solidification pull bar 1 realization limit to the rotation of drop-down limit.
In the present embodiment, the downward overhanging end capitiform that movable block 4 is passed in the bottom of above-mentioned directional solidification pull bar 1 becomes pull bar by driving end, and pull bar electric rotating machine 5 is rotated by driving end and then drive directional solidification pull bar 1 through space conical gear drive drive stay.Open pull bar electric rotating machine 5, regulate the speed of rotating, drive 1 rotation of directional solidification pull bar through the space conical gear drive, directional solidification pull bar 1 just can be realized the action of limit to the rotation of drop-down limit like this.
In the present embodiment, the major diameter bevel gear 13 in the above-mentioned conical gear drive is fixedly connected by driving end with pull bar.Directional solidification pull bar 1 and major diameter bevel gear 13 direct connections are fixed, can be obtained bigger gearratio, make pull bar electric rotating machine 5 low cruises more steady.
In the present embodiment, the said apparatus bracing frame comprises four guide posts 3.Adopt four guide posts 3 to form rectangular frame, simple in structure, easier for installation.
During assembling, at first with the device support stand horizontal fixed, directional solidification pull bar 1 is through two thrust ball bearings 10,12 and after overlapping upper bush 11; Pass movable block 4 and fixing; Open pull bar traction electric machine 7, regulate the speed of rotation and drive screw mandrel 9 rotated, movable block 4 can integral body move down during rotation.Open pull bar electric rotating machine 5, regulate the speed of rotating, drive 1 rotation of directional solidification pull bar through major diameter bevel gear 13, directional solidification pull bar 1 just can be realized the action of limit to the rotation of drop-down limit like this.Thereby make radial temperature and the concentration homogenising that is coupled again, liquid-solid boundary levels off to planar interface, makes sample under higher pulling rate, also can realize plane interface growth, has improved production efficiency.
Embodiment two:
The technical scheme of present embodiment and embodiment one is basic identical, and difference is:
In the present embodiment, pull bar electric rotating machine 5 is the preferred DC servo motor that adopts.The DC servo motor low cruise is more steady; Under utmost point low speed, also can guarantee rotating speed and constant-torque output stably; Rotating speed control accurately makes directional solidification pull bar 1 realization limit to the steadily action of rotation of drop-down limit, makes the freezing interface straightened; Make the control of crystal growth pattern gentlely more, reduce defective.Under carrying than weight body situation, the DC servo motor rotating speed also can suitably be regulated within the specific limits.
Embodiment three:
The technical scheme of present embodiment and embodiment one and embodiment two is basic identical, and difference is:
In the present embodiment, all preferred no gap bearing that adopts of thrust ball bearing 10,12, first spring bearing 15 and second spring bearing 8.What all rotary parts all adopted is no gap bearing, vibrations and error in the time of can reducing device work.
Embodiment four:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, first spring bearing 15 and second spring bearing 8 all preferably adopt cylinder roller bearing, and the bearing part that adopts when screw mandrel 9 is rotated is more easy to use and safeguard reduction equipment part cost.
Combine accompanying drawing that the utility model embodiment is illustrated above; But the utility model is not limited to the foregoing description; Can also make multiple variation according to the purpose that the utility model of the utility model is created; Change, the modification of making under all spirit and principles according to the utility model technical scheme, substitute, combination, simplify; All should be the substitute mode of equivalence,, all belong to the protection domain of the utility model as long as meet the structure and the aufbauprinciple of the rotation pull device that is used for the high temperature alloy directional solidification.
Claims (9)
1. rotation pull device that is used for the high temperature alloy directional solidification; Comprise device support stand; Said device support stand comprises the guide post (3) that has four parallel to each other and vertical settings at least; The apical support of said guide post (3) also is fixedly connected a top tie plate (2); The bottom of said guide post (3) is fixedly connected on a bottom fixed board (6); Said top tie plate (2) and bottom fixed board (6) setting parallel to each other; It is characterized in that: go up at said guide post (3) movable block (4) is installed; Said movable block (4) moves up and down along said guide post (3), and the directional solidification pull bar (1) of drop-down metal freezing strand also laterally arranges with said guide post (3), and said top tie plate (2) and said movable block (4) are passed in the bottom of said directional solidification pull bar (1); Said directional solidification pull bar (1) flexibly connects through the pull bar rotating mechanism with said movable block (4); Said movable block (4) slides along the axial nothing of said directional solidification pull bar (1) relatively, and promptly said movable block (4) moves down along said guide post (3) and promptly draws the drop-down ingot casting of said directional solidification pull bar (1), and a rhizoid bar (9) parallel with said guide post (3) also passes said top tie plate (2) and said movable block (4); Said screw mandrel (9) is connected through screw thread pair with said movable block (4); The bottom afterbody of said screw mandrel (9) is rotationally connected through first spring bearing (15) and said bottom fixed board (6), and said screw mandrel (9) also is rotationally connected through second spring bearing (8) and said top tie plate (2), and the upper end head of said screw mandrel (9) is fixedly connected with the transmission main shaft of pull bar traction electric machine (7); Said pull bar traction electric machine (7) is fixed on the top tie plate (2); Said movable block (4) is fixedly connected with pull bar electric rotating machine (5) through fixture (14), and said pull bar electric rotating machine (5) is positioned at said movable block (4) below, and the transmission main shaft of said pull bar electric rotating machine (5) drives said directional solidification pull bar (1) and rotates.
2. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 1; It is characterized in that: said pull bar rotating mechanism comprises that is embedded in a said sleeve (11); The two ends up and down of said sleeve (11) closely contact with the outer ring of two thrust ball bearings (10,12) respectively, and the inner ring side of said two thrust ball bearings (10,12) and said sleeve (11) inwall surround the cavity that said directional solidification pull bar (1) passes.
3. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 2; It is characterized in that: the downward overhanging end capitiform that said movable block (4) is passed in the bottom of said directional solidification pull bar (1) becomes pull bar by driving end, and said pull bar electric rotating machine (5) drives said pull bar by driving end and then drive said directional solidification pull bar (1) rotation through the space conical gear drive.
4. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 3 is characterized in that: the major diameter bevel gear (13) in the said conical gear drive is fixedly connected by driving end with said pull bar.
5. according to any described rotation pull device that is used for the high temperature alloy directional solidification in the claim 1～4, it is characterized in that: said device support stand comprises four guide posts (3).
6. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 5 is characterized in that: said pull bar electric rotating machine (5) is a DC servo motor.
7. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 5 is characterized in that: said first spring bearing (15) and second spring bearing (8) are no gap bearing.
8. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 5 is characterized in that: said first spring bearing (15) and second spring bearing (8) are cylinder roller bearing.
9. the rotation pull device that is used for the high temperature alloy directional solidification according to claim 2 is characterized in that: said two thrust ball bearings (10,12) are no gap bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204149869U CN202316977U (en) | 2011-10-27 | 2011-10-27 | Rotary pull-down device for directional solidification of high-temperature alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204149869U CN202316977U (en) | 2011-10-27 | 2011-10-27 | Rotary pull-down device for directional solidification of high-temperature alloy |
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| Publication Number | Publication Date |
|---|---|
| CN202316977U true CN202316977U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204149869U Expired - Fee Related CN202316977U (en) | 2011-10-27 | 2011-10-27 | Rotary pull-down device for directional solidification of high-temperature alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752808A (en) * | 2014-01-02 | 2014-04-30 | 西安交通大学 | Method for realizing casting variable withdrawing rate in directional solidification casting |
| CN103882509A (en) * | 2012-12-19 | 2014-06-25 | 北京有色金属研究总院 | Electron beam zone melting furnace and method for carrying out float zone purification on material |
| CN104295689A (en) * | 2014-11-11 | 2015-01-21 | 安徽精诚铜业股份有限公司 | Anti-descending smelted pull-cast screw rod |
| CN106807907A (en) * | 2016-12-23 | 2017-06-09 | 李蔚晶 | The cold crucible vacuum induction melting device for directionally solidifying of low radial symmetry gradient |
| CN112355281A (en) * | 2020-11-12 | 2021-02-12 | 李守忠 | Rotary pull-down device for directional solidification of high-temperature alloy |
-
2011
- 2011-10-27 CN CN2011204149869U patent/CN202316977U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882509A (en) * | 2012-12-19 | 2014-06-25 | 北京有色金属研究总院 | Electron beam zone melting furnace and method for carrying out float zone purification on material |
| CN103882509B (en) * | 2012-12-19 | 2016-12-28 | 北京有色金属研究总院 | A kind of area electron beam smelting furnace that material is carried out suspension zone-refine and method |
| CN103752808A (en) * | 2014-01-02 | 2014-04-30 | 西安交通大学 | Method for realizing casting variable withdrawing rate in directional solidification casting |
| CN103752808B (en) * | 2014-01-02 | 2015-07-01 | 西安交通大学 | Method for realizing casting variable withdrawing rate in directional solidification casting |
| CN104295689A (en) * | 2014-11-11 | 2015-01-21 | 安徽精诚铜业股份有限公司 | Anti-descending smelted pull-cast screw rod |
| CN106807907A (en) * | 2016-12-23 | 2017-06-09 | 李蔚晶 | The cold crucible vacuum induction melting device for directionally solidifying of low radial symmetry gradient |
| CN106807907B (en) * | 2016-12-23 | 2021-04-20 | 李蔚晶 | Low radial temperature gradient cold crucible vacuum induction melting directional solidification device |
| CN112355281A (en) * | 2020-11-12 | 2021-02-12 | 李守忠 | Rotary pull-down device for directional solidification of high-temperature alloy |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121027 |