CN103962544A - Automatic production line for precise investment casting - Google Patents
Automatic production line for precise investment casting Download PDFInfo
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- CN103962544A CN103962544A CN201410233438.4A CN201410233438A CN103962544A CN 103962544 A CN103962544 A CN 103962544A CN 201410233438 A CN201410233438 A CN 201410233438A CN 103962544 A CN103962544 A CN 103962544A
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- 238000005495 investment casting Methods 0.000 title claims abstract description 29
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Abstract
The invention relates to an automatic production line for precise investment casting, mainly aiming at solving the problems of low working efficiency, great energy consumption, high heat energy use ratio and instable casting quality due to manual operation during shell roasting and casting. The automatic production line is characterized in that a shell conveying device is arranged on one side of a roasting furnace (1) and comprises a driving chain wheel (4), a driven chain wheel (5), a chain (6), a chain plate type conveyer belt (7) and a chain driving device (8); a heat insulation plate (9) and a positioning plate (11) for holding shells (10) are sequentially arranged on the chain plate type conveyer belt (7); a casting device (2) is arranged at the outlet side of a channel (3) of the roasting furnace (1). By virtue of the automatic production line, the heat energy loss of the roasting furnace is reduced, the working efficiency and the heat energy use ratio are improved, the roasting operation and the casting operation are in perfect linkage, the casting quality is stable, a production environment is also improved, potential safety hazards and environmental pollution are eliminated, and the requirements on energy conservation and emission reduction are met.
Description
Technical field
The present invention relates to a kind of precision-investment casting device, be specifically related to a kind of precision-investment casting automatic production line.
Background technology
Precision-investment casting (Investment Casting) claims again lost wax casting or lost-wax casting (Lost-wax Casting), that this casting technique can be produced is accurate complicated, close to product final form, the metallic element obtaining by this casting technique can carry out machining or adopt a small amount of processing just can directly use, and is widely used in the process industries such as aviation, automobile, lathe, boats and ships, internal combustion engine, gas-turbine, telecommunication equipment, weapon, medicine equipment and cutter.The production procedure of precision-investment casting is mainly divided into presses wax, shell processed, Baking, cast, shelling, post processing, inspection etc., the metallic element of processing generally carries out batch duplicating taking fusible material (as wax material, plastics etc.) as copy, first suppress meltability mould with metal die penetrating on wax machine, then on meltability mould, apply multiple layer refractory, after the dry sclerosis of refractory coating, form shell, then the fusible material fusing in shell is made it to flow out.It is firm that shell makes it after roasting, and the liquid metal of fusing is poured in shell, and liquid metal shells after cooled and solidified in shell, obtains needed metallic element.Precision-investment casting has the following advantages: 1. because investment-casting has higher dimensional accuracy and surface smoothness, so can reduce machining work, a little allowance is stayed at the position of just having relatively high expectations on part, even some foundry goods only stays polishing, polishing surplus, needn't machining can use, significantly save raw material metal.2. model casting can be some soldering group component cast solids, save combination and welding sequence, have avoided the deviation and the thermal stress deformation that cause because of welding simultaneously.3. material selection is flexible, can cast the intricate casting of various alloys, particularly the special substance foundry goods such as casting heat-resistant steel, high temperature alloy, stainless steel.As shift fork, wheel hub etc. in auto parts machinery, the parts that almost cannot complete with mechanical processing technique.4. can quantize to produce, ensure the uniformity of parts, and avoid the stress of residual knife mark after machining to concentrate.
At present, in precision-investment casting process, Baking and cast mostly adopt manual operation, there is no continuous and automatic production line equipment, and in the roasting process of shell, energy consumes hugely, and energy utilization rate is low.Because the roasting shell of a stove, temperature in stove is greatly about 1200 DEG C of left and right, in the time of casting, need to manually open fire door, shell is taken out singly with specific purpose tool, when shell takes out, fire door opens wide, furnace heat is Quick diffusing to the outside, simultaneously, the heat of shell also heat radiation towards periphery itself is also very fast, cause the temperature fast-descending of shell, cause a large amount of heat energy losses and waste, directly affect the stability of shell temperature, the temperature of shell in the time of casting is inconsistent, cause the fluctuation of casting dimension accuracy, as the linear change amount of shell, make casting quality unstable, increase the workload of postorder operation.In said process, except in roaster and a large amount of heat energy losses of shell itself, also can produce dust and pernicious gas (as sulfur dioxide), serious environment pollution, make workshop environment become very severe, workman is subject to serious hyperthermia radiation, dust and pernicious gas and corrodes, and part producing workshop temperature reaches degree more than 40, has a strong impact on operator's physical and mental health.In addition, high temperature, the easy initiation fire of high radiant heat and blast, production accidents such as easily injuring by a crashing object, damage, scald, burn when manual operation, energy average utilization is 17%, energy consumption is about 2 times of casting developed country.According to statistics, the input of material and the energy accounts for 55%-70% of the output value, and labour drops into more, belongs to labor-intensive industry.In casting cycle, operational motion varies with each individual, and part operation is lack of standardization, also makes to smelt the contained dissipation of heat of liquid metals very fast, makes a large amount of thermal waste, easily produces the waste products such as casting crack, is difficult to ensure the stability of technique, affects casting quality.
Therefore, the Baking that can be continuously produced and the automatic production line equipment of cast are provided, substitute beyond doubt current manually-operated trend, to improve productivity ratio and the casting quality of precision-investment casting, reduce energy resource consumption, improve production environment, accomplish to substitute with machine, zero fail-safe is produced, reduce or stop environmental pollution, accomplish green production, reduce production costs, improve international competitiveness.
Summary of the invention
Adopt manual operation inefficiency when solving in precision-investment casting process Baking and cast, energy resource consumption is large, heat utilization rate is low and the unsettled problem of casting quality, the invention provides a kind of precision-investment casting automatic production line, this automatic production line effectively reduces the heat-energy losses of roaster, operating efficiency and heat utilization rate are improved, make perfect linking between roasting operation and casting operation, casting quality is stable, improved production environment simultaneously, stop potential safety hazard and environmental pollution, met the requirement of energy-saving and emission-reduction.
Technical scheme of the present invention is: this precision-investment casting automatic production line, comprise roaster and pouring device, the bottom of described roaster is provided with the passage running through, one side of roaster is provided with shell conveying device, described shell conveying device comprises drive sprocket, by movable sprocket, chain, chain-plate type conveyer belt and chain drive, chain-plate type conveyer belt is connected to the upper end of chain, on chain-plate type conveyer belt, be provided with successively the positioning disk of thermal insulation board and placement shell, chain is driven cycle operation and is driven chain-plate type conveyer belt by chain drive, thermal insulation board and positioning disk enter from passage one end of roaster, the other end passes, the import of described passage and outlet flexible sealing all and between shell, the bottom of described passage is provided with the guide rail of the board-like conveyer belt of support chain, described pouring device is arranged on the channel outlet side of roaster.
Described guide rail below is provided with air-cooled passage.
The sidewall of described roaster is provided with burner, and one end of air-cooled passage communicates with the air feed system of burner.
Described guide rail inside is provided with water cooling tube.
The cross section of described roaster is " bow " font falling down, and roaster is divided into two combustion chambers, and two combustion chambers are connected by passage.
Described pouring device comprises intermediate frequency furnace, reduction box and servomotor, and servomotor control intermediate frequency furnace is pressed fixed angle and rotated, and controls the angle of inclination of intermediate frequency furnace, and intermediate frequency furnace below is provided with funnel, is provided with the light-controller of monitoring casting liquid level in funnel.
Described chain-plate type conveyer belt comprises multiple carrier bars, carrier bar the inner is trapezoidal, carrier bar is connected on chain, described thermal insulation board is stepped, thermal insulation board is connected on carrier bar, the ladder of two adjacent thermal insulation boards is relative, fits at drive sprocket with by the inner both sides between the adjacent carrier bar of revolution place of movable sprocket, and the inner of adjacent thermal insulation board overlaps mutually.
Between the channel outlet of described roaster and pouring device, be provided with the station of 3-4 positioning disk, and be provided with insulation passage at this station place.
Described positioning disk is provided with passage of flame, and passage of flame connects to shell bottom.
Described passage of flame is opened the circumference at positioning disk along radially setting and its entrance of positioning disk.
The present invention has following beneficial effect: owing to taking technique scheme, effectively reduce the heat-energy losses of roaster, operating efficiency and heat utilization rate are improved, make perfect linking between roasting operation and casting operation, casting quality is stable, improve production environment simultaneously, stopped potential safety hazard and environmental pollution, met the requirement of energy-saving and emission-reduction.
Brief description of the drawings
Accompanying drawing 1 is structure cutaway view of the present invention.
Accompanying drawing 2 is top views of Fig. 1.
Accompanying drawing 3 is sectional views of roaster 1 in Fig. 1.
Accompanying drawing 4 is structural representations of pouring device 2 in Fig. 1.
Accompanying drawing 5 is A place structure enlarged drawings in Fig. 1.
Accompanying drawing 6 is B place structure enlarged drawings in Fig. 3.
Accompanying drawing 7 is structure cutaway views of positioning disk 11 in Fig. 1.
Accompanying drawing 8 is top views of Fig. 7.
Accompanying drawing 9 is structural representations of thermal insulation board 9 in Fig. 5.
Accompanying drawing 10 is structure cutaway views of thermal insulation board 9 in Fig. 5.
Accompanying drawing 11 is structural representations of Fig. 5 intermediate plate 23.
1-roaster in figure, 2-pouring device, 3-passage, 4-drive sprocket, 5-is by movable sprocket, 6-chain, 7-chain-plate type conveyer belt, 8-chain drive, 9-thermal insulation board, 10-shell, 11-positioning disk, 12-guide rail, the air-cooled passage of 13-, 14-burner, 15-water cooling tube, 16-combustion chamber, 17-passage of flame, 18-intermediate frequency furnace, 19-reduction box, 20-servomotor, 21-funnel, 22-light-controller, 23-carrier bar, 24-is incubated passage.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
Shown in Fig. 1～Figure 11, this precision-investment casting automatic production line, comprise roaster 1 and pouring device 2, the bottom of described roaster 1 is provided with the passage 3 running through, one side of roaster 1 is provided with shell conveying device, described shell conveying device comprises drive sprocket 4, by movable sprocket 5, chain 6, chain-plate type conveyer belt 7 and chain drive 8, chain-plate type conveyer belt 7 is connected to the upper end of chain 6, on chain-plate type conveyer belt 7, be provided with successively the positioning disk 11 of thermal insulation board 9 and placement shell 10, chain 6 is driven cycle operation and is driven chain-plate type conveyer belt 7 by chain drive 8, thermal insulation board 9 and positioning disk 11 enter from passage 3 one end of roaster 1, the other end passes, the import of described passage 3 and outlet flexible sealing all and between shell 10, the bottom of described passage 3 is provided with the guide rail 12 of the board-like conveyer belt 7 of support chain, described pouring device 2 is arranged on passage 3 outlet sides of roaster 1.
Described guide rail 12 belows are provided with air-cooled passage 13.
The sidewall of described roaster 1 is provided with burner 14, and one end of air-cooled passage 13 communicates with the air feed system of burner 14.
Described guide rail 12 inside are provided with water cooling tube 15.
The cross section of described roaster 1 is " bow " font falling down, and roaster 1 is divided into 16, two combustion chambers 16 of two combustion chambers and is connected by passage 3.Chain-plate type conveyer belt 7, in traveling process, extends the heat time of shell 10, can also ensure the continuity of automated production simultaneously.
Described pouring device 2 comprises intermediate frequency furnace 18, reduction box 19 and servomotor 20, the angle of inclination of intermediate frequency furnace 18 controlled intermediate frequency furnace 18 and rotates and control by fixed angle by servomotor 20, intermediate frequency furnace 18 belows are provided with funnel 21, are provided with the light-controller 22 of monitoring casting liquid level in funnel 21.
Described chain-plate type conveyer belt 7 comprises multiple carrier bars 23, carrier bar 23 the inners are trapezoidal, carrier bar 23 is connected on chain 6, described thermal insulation board 9 is stepped, thermal insulation board 9 is connected on carrier bar 23, the ladder of two adjacent thermal insulation boards 9 is relative, fits at drive sprocket 4 with by the inner both sides between the adjacent carrier bar 23 of revolution place of movable sprocket 5, and the inner of adjacent thermal insulation board 9 overlaps mutually.
Between passage 3 outlets of described roaster 1 and pouring device 2, be provided with the station of 3-4 positioning disk 11, and be provided with insulation passage 24 at this station place.
Described positioning disk 11 is provided with passage of flame 17, and passage of flame 17 connects to shell 10 bottoms.
Described passage of flame 17 is opened the circumference at positioning disk 11 along radially setting and its entrance of positioning disk 11.
Owing to taking technique scheme, the shell 10 for the treatment of roasting is placed in the positioning disk 11 on import department's chain-plate type conveyer belt 7 of passage 3, the present embodiment adopts artificial placement, and chain-plate type conveyer belt 7 is along carrying clockwise, and putting interval time is about 30 minutes.Shell 10 is along with chain-plate type conveyer belt 7 enters in roaster 1, each shell 10 is at the interior roasting 25-30 minute of roaster 1, make shell 10 roastings to 1100 DEG C left and right, the transporting velocity of chain-plate type conveyer belt 7 and beat can be by technique initializations, and and then the shell 10 transporting out just casts in the exit of passage 3, and the temperature drop of shell 10 is less, and the temperature difference of multiple shells 10 is less, can keep higher uniformity, casting technique is stable, can guarantee the quality of mo(u)lded piece.Meanwhile, can be controlled and be set the duration of pouring by PLC, carries out automation casting, to obtain the best disposal pouring time, the uniformity of the duration of pouring is also very high, so, can effectively improve qualified casting, experiment shows that yield rate is up to more than 99 percent.
The present invention compares and has the following advantages with background technology:
1. owing to not needing to open the fire door of roaster 1 in the process of shell 10 roastings and casting, heat in burner hearth can be to unofficial biography conduction and radiation, keep the temperature stabilization in burner hearth, the thermal efficiency is improved greatly, make the heat time of shell 10 shorten about 15 minutes, adopted this automatic production line, can save energy resource consumption more than 40%, reduce environmental pollution, the generation of stopping workman's occupational disease, economic benefit and social benefit have realized maximization.
2. ensure the roasting of shell 10 and the continuity of casting, avoided the dissipation of heat of shell 10 in moved by hand process, improved the thermal efficiency, energy-conserving and environment-protective.
3. adopt PLC programming Control, programming is convenient, and the roasting time of shell 10 and the casting time of liquid metal can be set to optimum value, have improved operating efficiency more than 4 times, saves and has reduced a large amount of manual operations process time.Meanwhile, solve the thick and large section of foundry goods in the past and had the problem such as gross segregation, coarse grains, improved the quality of products preferably.
4. thermal insulation board 9 has intercepted the downward heat radiation of the naked light in burner hearth and heat conduction, has improved the thermal efficiency, ensures equipment trouble-free operation, has saved the energy.
5. adopt light-controller 22, guarantee the amount liquid metal of cast, make the appropriate benefit of liquid metal consumption, meanwhile, adopt the control of cast angular progression, carry out dual fail-safe control to watering fluence, guarantee to pour into a mould safety, save consumption 5% left and right than artificial cast.If have the situation of crackle just in case run into shell 10, while occurring that liquid metal leaks outside, light-controller 22 can catch in time this information and stop the casting to this shell 10, after this waste product shell 10 passes through, next shell 10 is cast, the liquid metal having entered with crackle shell 10 is discharged safely by overflow pipe again.
6. utilize air-cooled waste heat, heating enters the air in burner hearth, has improved the thermal efficiency, accomplishes energy-conserving and environment-protective.Also can set up water-cooling system, improve the using adaptability of equipment.
7. positioning disk 11 is designed to the structure of porous, makes the flame in roaster 1 to enter shell 10 bottoms by passage of flame 25, shell 10 is heated more even, ensures the roasting quality of shell 10.
Shell 10 on time intermittence enter in roaster 1, while having avoided manual operation, open fire door completely, shell 10 is put together, and is made the interior temperature of roaster 1 lower; Variations in temperature in the present invention in roaster 1 is less, can make shell 10 heated fast, has saved the heat time of shell 10, improve productivity ratio, meanwhile, water vapour contained in shell 10 can be got rid of preferably, has ensured roasting and the casting quality of shell 10.
Claims (10)
1. a precision-investment casting automatic production line, comprise roaster (1) and pouring device (2), it is characterized in that: the bottom of described roaster (1) is provided with the passage (3) running through, one side of roaster (1) is provided with shell conveying device, described shell conveying device comprises drive sprocket (4), by movable sprocket (5), chain (6), chain-plate type conveyer belt (7) and chain drive (8), chain-plate type conveyer belt (7) is connected to the upper end of chain (6), on chain-plate type conveyer belt (7), be provided with successively the positioning disk (11) of thermal insulation board (9) and placement shell (10), chain (6) is driven cycle operation and is driven chain-plate type conveyer belt (7) by chain drive (8), thermal insulation board (9) and positioning disk (11) enter from passage (3) one end of roaster (1), the other end passes, the import of described passage (3) and outlet flexible sealing all and between shell (10), the bottom of described passage (3) is provided with the guide rail (12) of the board-like conveyer belt of support chain (7), described pouring device (2) is arranged on passage (3) outlet side of roaster (1).
2. precision-investment casting automatic production line according to claim 1, is characterized in that: described guide rail (12) below is provided with air-cooled passage (13).
3. precision-investment casting automatic production line according to claim 2, it is characterized in that: the sidewall of described roaster (1) is provided with burner (14), one end of air-cooled passage (13) communicates with the air feed system of burner (14).
4. precision-investment casting automatic production line according to claim 1, is characterized in that: described guide rail (12) inside is provided with water cooling tube (15).
5. according to the precision-investment casting automatic production line described in claim 1,2,3 or 4, it is characterized in that: the cross section of described roaster (1) is " bow " font falling down, roaster (1) is divided into two combustion chambers (16), and two combustion chambers (16) are connected by passage (3).
6. according to the precision-investment casting automatic production line described in claim 1,2,3 or 4, it is characterized in that: described pouring device (2) comprises intermediate frequency furnace (18), reduction box (19) and servomotor (20), servomotor (20) control intermediate frequency furnace (18) rotates and controls the angle of inclination of intermediate frequency furnace (18) by fixed angle, intermediate frequency furnace (18) below is provided with funnel (21), is provided with the light-controller (22) of monitoring casting liquid level in funnel (21).
7. according to claim 1, 2, precision-investment casting automatic production line described in 3 or 4, it is characterized in that: described chain-plate type conveyer belt (7) comprises multiple carrier bars (23), carrier bar (23) the inner is trapezoidal, carrier bar (23) is connected on chain (6), described thermal insulation board (9) is stepped, thermal insulation board (9) is connected on carrier bar (23), the ladder of adjacent two thermal insulation boards (9) is relative, fit at drive sprocket (4) with by the inner both sides between the adjacent carrier bar of revolution place (23) of movable sprocket (5), the inner of adjacent thermal insulation board (9) overlaps mutually.
8. according to the precision-investment casting automatic production line described in claim 1,2,3 or 4, it is characterized in that: between passage (3) outlet of described roaster (1) and pouring device (2), be provided with the station of 3-4 positioning disk (11), and be provided with insulation passage (24) at this station place.
9. according to the precision-investment casting automatic production line described in claim 1,2,3 or 4, it is characterized in that: described positioning disk (11) is provided with passage of flame (17), passage of flame (17) connects to shell (10) bottom.
10. precision-investment casting automatic production line according to claim 9, is characterized in that: described passage of flame (17) is opened the circumference in positioning disk (11) along radially setting and its entrance of positioning disk (11).
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| CN201410233438.4A CN103962544B (en) | 2014-05-29 | 2014-05-29 | Precision-investment casting automatic production line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105772634A (en) * | 2016-03-09 | 2016-07-20 | 镇江新航精密铸造有限公司 | Dewaxing system |
| CN106825413A (en) * | 2017-04-06 | 2017-06-13 | 温州职业技术学院 | Model casting casing equipment processed automatically |
| CN106938317A (en) * | 2017-04-13 | 2017-07-11 | 鹰普（中国）有限公司 | A kind of model casting automatic casting system |
| CN112276007A (en) * | 2020-10-30 | 2021-01-29 | 嵊州市金霖机械制造有限公司 | Roasting device for plough by investment casting |
| CN115194137A (en) * | 2022-07-29 | 2022-10-18 | 中机第一设计研究院有限公司 | Automatic pouring production line and pouring method |
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| CN106825413A (en) * | 2017-04-06 | 2017-06-13 | 温州职业技术学院 | Model casting casing equipment processed automatically |
| CN106825413B (en) * | 2017-04-06 | 2018-11-02 | 温州职业技术学院 | Model casting casing equipment processed automatically |
| CN106938317A (en) * | 2017-04-13 | 2017-07-11 | 鹰普（中国）有限公司 | A kind of model casting automatic casting system |
| CN106938317B (en) * | 2017-04-13 | 2020-04-14 | 鹰普（中国）有限公司 | Automatic casting system for investment casting |
| CN112276007A (en) * | 2020-10-30 | 2021-01-29 | 嵊州市金霖机械制造有限公司 | Roasting device for plough by investment casting |
| CN115194137A (en) * | 2022-07-29 | 2022-10-18 | 中机第一设计研究院有限公司 | Automatic pouring production line and pouring method |
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| CN103962544B (en) | 2015-11-11 |
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