CN113969342B - Machining process of casting - Google Patents
Machining process of casting Download PDFInfo
- Publication number
- CN113969342B CN113969342B CN202111269849.5A CN202111269849A CN113969342B CN 113969342 B CN113969342 B CN 113969342B CN 202111269849 A CN202111269849 A CN 202111269849A CN 113969342 B CN113969342 B CN 113969342B
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- Prior art keywords
- fixedly connected
- furnace body
- rod
- connecting rod
- workpiece
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention provides a processing technology of a casting piece, which comprises the following steps of designing a die; smelting; cleaning falling sand; surface treatment of a workpiece; carrying out heat treatment on the workpiece with the surface treated; shot blasting is performed on the surface of a workpiece; polishing; the heat treatment furnace in the fifth step comprises a bracket, a furnace body is arranged on the bracket, two rails are fixedly connected on the ground, a loading trolley is connected on the rails in a sliding manner, a layer of refractory bricks is paved on the upper surface of the loading trolley, the lower end of the furnace body is communicated with the outside, a driving mechanism for driving the furnace body to move up and down is arranged on the bracket, and during heat treatment, the lower surface of the furnace body is placed on the upper surface of the loading trolley.
Description
Technical Field
The invention belongs to the technical field of casting processes, and particularly relates to a processing process of a casting.
Background
Casting is a metal hot working process which is relatively early mastered by humans and has been known for about 6000 years. China has entered the full bloom of bronze castings between 1700 and 1000 years before the first official metase, and has reached quite high levels in technology. Casting is a process in which liquid metal is cast into a casting cavity that conforms to the shape of the part, and after it has cooled to solidify, the part or blank is obtained. The casting material is mostly metal (such as copper, iron, aluminum, tin, lead, etc.) which is solid but heated to liquid state, and the casting material can be sand, metal or even ceramic. The method used will also vary according to the requirements.
In the existing casting process, an operator injects molten raw materials into a mold, performs cooling shaping in the mold, then performs surface treatment on a finished product, and performs heat treatment processing on the mold after the treatment is completed.
After the existing heat treatment furnace is used for a long time, the gap between the heat treatment furnace and the trolley is enlarged, so that heat in the heat treatment furnace is lost from the gap when the heat treatment furnace is used for heat treatment of workpieces, and energy consumption is increased.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a processing technology of a casting piece, which has the characteristics of improving the tightness between a furnace body and a loading trolley and reducing the heat loss in the furnace body.
The aim of the invention can be achieved by the following technical scheme:
the processing technology of the casting part comprises the following steps of firstly, designing a mould, designing the mould according to the requirement, and manufacturing the mould; smelting, namely pouring raw material steel into a mold after smelting, and cooling after pouring is completed; step three, sand falling cleaning is carried out, and sand falling on the outer wall of the workpiece is cleaned; fourthly, carrying out surface treatment on the workpiece, and carrying out gas cutting and repair welding on redundant parts of the surface of the workpiece; fifthly, carrying out heat treatment on the surface-treated workpiece, and carrying out heat treatment on the workpiece through a heat treatment furnace; step six, shot blasting is carried out on the surface of the workpiece, and shot blasting treatment is carried out on the surface of the workpiece through a shot blasting machine; step seven, polishing, namely further polishing the surface of the workpiece through a handheld polisher; the heat treatment furnace in the fifth step comprises a support, a furnace body is arranged on the support, two rails are fixedly connected to the ground, a loading trolley is connected to the rails in a sliding mode, a layer of refractory bricks is paved on the upper surface of the loading trolley, the lower end of the furnace body is communicated with the outside, a driving mechanism used for driving the furnace body to move up and down is arranged on the support, and during heat treatment, the lower surface of the furnace body is placed on the upper surface of the loading trolley.
Further, a fireproof cotton layer is fixedly connected to the lower surface of the furnace body, and the furnace body is abutted to the loading trolley through the fireproof cotton layer.
Further, the driving mechanism comprises two windlass fixedly connected to the support, two hanging rings fixedly connected to the upper surface of the furnace body, a positioning rod fixedly connected to the support and a positioning ring fixedly connected to the side wall of the furnace body, the positioning rod is slidably connected to the positioning rod, and one end of a steel wire rope on the windlass is fixedly connected to the hanging rings.
Further, a rotating rod is rotatably connected to the end faces of two ends of the furnace body, a mounting plate is fixedly connected to one end of the rotating rod, a sealing plate is fixedly connected between the two mounting plates, a gap is formed between the upper surface of the sealing plate and the lower surface of the furnace body, and a driving piece for driving the rotating rod to rotate is arranged between the support and the rotating rod.
Further, the driving piece comprises a driving gear fixedly connected to the outer wall of the rotating rod and a driving rack fixedly connected to the support, and the driving rack is vertically arranged and meshed with the driving gear.
Further, a support frame is fixedly connected to the end faces of two ends of the furnace body, two sliding rods are fixedly connected to the support frame, a sliding groove is formed in the opposite faces of the two sliding rods, a sliding plate is slidably connected to the two sliding grooves, one end of the rotating rod is rotatably connected to the sliding plate, and a connecting mechanism for driving the sliding plate to move upwards when the furnace body moves upwards is arranged between the support frame and the support frame.
Further, coupling mechanism includes the connecting rod of fixed connection on the support frame, rotates connecting rod, fixed connection branch on the support, fixed connection on the connecting plate of one side lateral wall that the dwang was kept away from to the sliding plate, branch is vertical setting and branch lower extreme and connecting rod one end alignment, the connecting rod is greater than the connecting rod to the one end distance that the connecting rod is close to the branch to the one end that the branch was kept away from to the connecting rod, fixedly connected with balancing weight on the one end lower surface that the branch was kept away from to the connecting rod fixedly connected with baffle on the furnace body outer wall, the one end butt that the connecting rod is close to the branch is on the baffle lower surface, the connecting rod is the slope setting and the one end butt that the branch was kept away from to the connecting rod is on the connecting plate lower surface.
Further, a first groove is formed in the end face of one end, far away from the supporting rod, of the connecting rod, a first roller is rotationally connected in the first groove, a second groove is formed in the lower surface of the supporting rod, and a second roller is rotationally connected in the second groove.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the workpieces are stacked on the loading trolley, the loading trolley is moved to a preset place, the furnace body is driven to move downwards through the driving mechanism, the lower surface of the furnace body is abutted against the upper surface of the loading trolley, and through the arrangement, the structure is simple, the operation is convenient, the tightness between the furnace body and the loading trolley is improved, and the heat loss in the furnace body is reduced.
2. After the processing of the workpieces is finished, the driving mechanism drives the furnace body to move upwards, the driving gear is meshed with the driving rack, the driving rack drives the driving gear to move, the driving gear drives the rotating rod to move, the rotating rod drives the mounting plate to move, the mounting plate drives the sealing plate to move, and the sealing plate moves to the lower part of the furnace body.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a driving member in the present invention.
Fig. 3 is a schematic view of the structure of the back surface of the sliding plate in the present invention.
In the figure, 1, a bracket; 2. a furnace body; 3. a track; 4. a loading trolley; 5. refractory bricks; 6. a driving mechanism; 7. a fireproof cotton layer; 8. a hoist; 9. a hanging ring; 10. a positioning rod; 11. a positioning ring; 12. a rotating lever; 13. a mounting plate; 14. a closing plate; 15. a driving member; 16. a drive gear; 17. a drive rack; 18. a support frame; 19. a slide bar; 20. a chute; 21. a sliding plate; 22. a connecting mechanism; 23. a connecting rod; 24. a connecting rod; 25. a support rod; 26. a connecting plate; 27. balancing weight; 28. a baffle; 29. a first groove; 30. a first roller; 31. a second groove; 32. and a second roller.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, a process for machining a cast member includes the steps of:
step one, designing a mould, designing the mould according to the requirement, and manufacturing the mould;
smelting, namely pouring raw material steel into a mold after smelting, and cooling after pouring is completed;
step three, sand falling cleaning is carried out, and sand falling on the outer wall of the workpiece is cleaned;
fourthly, carrying out surface treatment on the workpiece, and carrying out gas cutting and repair welding on redundant parts of the surface of the workpiece;
fifthly, carrying out heat treatment on the surface-treated workpiece, and carrying out heat treatment on the workpiece through a heat treatment furnace;
step six, shot blasting is carried out on the surface of the workpiece, and shot blasting treatment is carried out on the surface of the workpiece through a shot blasting machine;
and seventhly, polishing, namely further polishing the surface of the workpiece through a handheld polisher.
As shown in fig. 2, the heat treatment furnace in the fifth step comprises a bracket 1, a furnace body 2 is installed on the bracket 1, two sliding rails are fixedly connected on the ground, a loading trolley 4 is slidably connected on a rail 3, a layer of refractory bricks 5 is paved on a trademark of the loading trolley 4, the furnace body 2 is hollow and the lower end is communicated with the outside, a driving mechanism 6 for driving the furnace body 2 to move up and down is arranged on the bracket 1, a workpiece is placed on the loading trolley 4, and the lower surface of the furnace body 2 is abutted on the loading trolley 4.
As shown in fig. 1 and 2, the driving mechanism 6 comprises a hoist 8, a lifting ring 9, a positioning rod 10 and a positioning ring 11, wherein the hoist 8 is fixedly connected to the upper surface of the support 1, two hoists 8 are fixedly connected to the upper surface of the support 1, the lifting ring 9 is fixedly connected to the upper surface of the furnace body 2, two lifting rings 9 are fixedly connected to the upper surface of the furnace body 2, one end of a steel wire rope on the hoist 8 is fixedly connected to the lifting ring 9, the positioning rod 10 is fixedly connected to the support 1, the positioning rod 10 is vertically arranged, the positioning ring 11 is fixedly connected to the side wall of the furnace body 2, and the positioning rod 10 is slidably connected to the positioning ring 11.
As shown in fig. 1, in order to improve the tightness between the furnace body 2 and the loading trolley 4, a fireproof cotton layer 7 is fixedly connected to the lower surface of the furnace body 2, and the furnace body 2 is abutted against the upper surface of the loading trolley 4 through the fireproof cotton layer 7.
As shown in fig. 1 and 2, a rotating rod 12 is rotatably connected to the end surfaces of two ends of the furnace body 2, one end of the rotating rod 12 is fixedly connected with a mounting plate 13, a sealing plate 14 is fixedly connected between the two mounting plates 13, a gap is formed between the sealing plate 14 and the lower surface of the furnace body 2, and a driving piece 15 for driving the rotating rod 12 to rotate is arranged between the bracket 1 and the rotating rod 12.
As shown in fig. 1 and 2, the driving member 15 includes a driving gear 16 and a driving rack 17, the driving rack 17 is fixedly connected to the bracket 1, the driving rack 17 is disposed along a vertical direction, the driving gear 16 is fixedly connected to an outer wall of the rotating rod 12, and the driving rack 17 is meshed with the driving gear 16.
As shown in fig. 1, 2 and 3, for convenience, an operator supports the closing plate 14 against the lower surface of the furnace body 2, two end faces at two ends of the furnace body 2 are fixedly connected with a supporting frame 18, two sliding rods 19 are fixedly connected with the supporting frame 18, the two sliding rods 19 are vertically arranged and are arranged in parallel, two sliding grooves 20 are formed in opposite faces of the two sliding rods 19, a sliding plate 21 is slidably connected in the two sliding grooves 20, one end of the rotating rod 12 is rotatably connected to the sliding plate 21, and a connecting mechanism 22 for driving the sliding plate 21 to move upwards when the furnace body 2 moves upwards is arranged between the supporting frame 18 and the supporting frame 1.
As shown in fig. 1, fig. 2 and fig. 3, the connecting mechanism 22 comprises a connecting rod 23, a connecting rod 24, a supporting rod 25 and a connecting plate 26, the connecting rod 23 is fixedly connected to the supporting frame 18, the connecting rod 24 is rotationally connected to the connecting rod 23, the connecting rod 24 and the connecting rod 23 are vertically arranged, one end of the supporting rod 25 is fixedly connected to the bracket 1, the supporting rod 25 is vertically arranged, the distance from the connecting rod 23 to one end of the connecting rod 24, which is close to the supporting rod 25, is smaller than the distance from the connecting rod 23 to one end of the connecting rod 24, which is far away from the supporting rod 25, the lower end of the supporting rod 25 is aligned with one end of the connecting rod 24, the connecting plate 26 is fixedly connected to the side wall of the sliding plate 21, which is far away from the rotating rod 12, a balancing weight 27 is fixedly connected to the lower surface of one end of the connecting rod 24, which is far away from the supporting rod 25, is abutted to the lower surface of the connecting plate 26 under the action of the balancing weight 27.
As shown in fig. 1, 2 and 3, in order to improve the stability of the movement of the connecting rod 24 driven by the supporting rod 25, a second groove 31 is formed on the end surface of the lower end of the supporting rod 25, a second roller 32 is rotatably connected between the inner walls of the two sides of the second groove 31, the second roller 32 is abutted against the outer wall of the connecting rod 24, in order to improve the stability of the movement of the connecting rod 26 driven by the connecting rod 24, a first groove 29 is formed on the end surface of one end of the connecting rod 24, a first roller 30 is rotatably connected between the inner walls of the two sides of the first groove 29, and the first roller 30 is abutted against the lower surface of the connecting rod 26.
The working principle of the embodiment of the invention is as follows: stacking the workpieces on the loading trolley 4, driving the loading trolley 4 to a preset place, driving the furnace body 2 to move downwards by the winch 8, and abutting the furnace body 2 on the upper surface of the loading trolley 4;
after the heat treatment is finished, the winch 8 drives the furnace body 2 to move upwards, the driving gear 16 is meshed with the driving rack 17, the driving gear 16 rotates, the driving gear 16 drives the rotating rod 12 to move, the rotating rod 12 drives the mounting plate 13 to rotate, the mounting plate 13 drives the sealing plate 14 to move, the sealing plate 14 moves to the lower part of the furnace body 2, at the moment, the driving gear 16 is separated from the driving rack 17, a second roller 32 on one end of the supporting rod 25 is abutted to one end of the connecting rod 24, the supporting rod 25 drives the connecting rod 24 to rotate, the connecting rod 24 drives the sliding plate 21 to slide upwards, the sliding plate 21 drives the rotating rod 12 to move upwards, the rotating rod 12 drives the sealing plate 14 to move upwards through the mounting plate 13, and the sealing plate 14 is abutted to the lower surface of the furnace body 2.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although such terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (1)
1. A processing technology of a casting piece is characterized by comprising the following steps,
step one, designing a mould, designing the mould according to the requirement, and manufacturing the mould;
smelting, namely pouring raw material steel into a mold after smelting, and cooling after pouring is completed;
step three, sand falling cleaning is carried out, and sand falling on the outer wall of the workpiece is cleaned;
fourthly, carrying out surface treatment on the workpiece, and carrying out gas cutting and repair welding on redundant parts of the surface of the workpiece;
fifthly, carrying out heat treatment on the surface-treated workpiece, and carrying out heat treatment on the workpiece through a heat treatment furnace;
step six, shot blasting is carried out on the surface of the workpiece, and shot blasting treatment is carried out on the surface of the workpiece through a shot blasting machine;
step seven, polishing, namely further polishing the surface of the workpiece through a handheld polisher;
the heat treatment furnace in the fifth step comprises a bracket (1), wherein a furnace body (2) is arranged on the bracket (1), two rails (3) are fixedly connected on the ground, a loading trolley (4) is slidably connected on the rails (3), a layer of refractory bricks (5) is paved on the upper surface of the loading trolley (4), the lower end of the furnace body (2) is communicated with the outside, a driving mechanism (6) for driving the furnace body (2) to move up and down is arranged on the bracket (1), and during heat treatment, the lower surface of the furnace body (2) is placed on the upper surface of the loading trolley (4); a fireproof cotton layer (7) is fixedly connected to the lower surface of the furnace body (2), and the furnace body (2) is abutted against the loading trolley (4) through the fireproof cotton layer (7); the driving mechanism (6) comprises two windlass (8) fixedly connected to the bracket (1), two hanging rings (9) fixedly connected to the upper surface of the furnace body (2), a positioning rod (10) fixedly connected to the bracket (1) and a positioning ring (11) fixedly connected to the side wall of the furnace body (2), wherein the positioning rod (10) is slidably connected to the positioning ring (11), and one end of a steel wire rope on the windlass (8) is fixedly connected to the hanging rings (9); a rotating rod (12) is rotationally connected to the end surfaces of two ends of the furnace body (2), one end of the rotating rod (12) is fixedly connected with a mounting plate (13), a sealing plate (14) is fixedly connected between the two mounting plates (13), a gap is formed between the upper surface of the sealing plate (14) and the lower surface of the furnace body (2), and a driving piece (15) for driving the rotating rod (12) to rotate is arranged between the bracket (1) and the rotating rod (12); the driving piece (15) comprises a driving gear (16) fixedly connected to the outer wall of the rotating rod (12) and a driving rack (17) fixedly connected to the bracket (1), wherein the driving rack (17) is vertically arranged and meshed with the driving gear (17); the two end faces of the two ends of the furnace body (2) are fixedly connected with a supporting frame (18), the supporting frame (18) is fixedly connected with two sliding rods (19), the opposite faces of the two sliding rods (19) are provided with sliding grooves (20), the sliding grooves (20) are slidably connected with a sliding plate (21), one end of the rotating rod (12) is rotatably connected to the sliding plate (21), and a connecting mechanism (22) for driving the sliding plate (21) to move upwards when the furnace body (2) moves upwards is arranged between the supporting frame (18) and the bracket (1); the connecting mechanism (22) comprises a connecting rod (23) fixedly connected to the supporting frame (18), a connecting rod (24) rotatably connected to the connecting rod (23), a supporting rod (25) fixedly connected to the bracket (1), and a connecting plate (26) fixedly connected to the side wall of the sliding plate (21) far away from the rotating rod (12), wherein the supporting rod (25) is vertically arranged, the lower end of the supporting rod (25) is aligned with one end of the connecting rod (24), the distance from the connecting rod (23) to one end of the connecting rod (24) far away from the supporting rod (25) is greater than the distance from the connecting rod (23) to one end of the connecting rod (24) near the supporting rod (25), a balancing weight (27) is fixedly connected to the lower surface of one end of the connecting rod (24) far away from the supporting rod (25), a baffle (28) is fixedly connected to the outer wall of the furnace body (2), one end of the connecting rod (24) near the supporting rod (25) is abutted to the lower surface of the baffle (28), the connecting rod (24) is obliquely arranged, and one end of the connecting rod (24) far away from the supporting rod (25) is abutted to the lower surface of the connecting plate (26); a first groove (29) is formed in the end face of one end, far away from the supporting rod (25), of the connecting rod (24), a first roller (30) is rotatably connected in the first groove (29), a second groove (31) is formed in the lower surface of the supporting rod (25), and a second roller (32) is rotatably connected in the second groove (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269849.5A CN113969342B (en) | 2021-10-29 | 2021-10-29 | Machining process of casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269849.5A CN113969342B (en) | 2021-10-29 | 2021-10-29 | Machining process of casting |
Publications (2)
| Publication Number | Publication Date |
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| CN113969342A CN113969342A (en) | 2022-01-25 |
| CN113969342B true CN113969342B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111269849.5A Active CN113969342B (en) | 2021-10-29 | 2021-10-29 | Machining process of casting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008229467A (en) * | 2007-03-20 | 2008-10-02 | Daifuku Co Ltd | Heat treatment apparatus |
| CN108927492A (en) * | 2018-08-16 | 2018-12-04 | 全椒县全动机械有限公司 | A kind of cast steel intermediate product of diesel engine manufacturing process |
| CN111637738A (en) * | 2020-06-05 | 2020-09-08 | 北京北方华创微电子装备有限公司 | Furnace door control device for vertical furnace and vertical furnace |
| CN214193369U (en) * | 2020-12-25 | 2021-09-14 | 河南沃福德环保科技有限公司 | Trolley type resistance furnace with furnace body capable of being positioned and lifted |
-
2021
- 2021-10-29 CN CN202111269849.5A patent/CN113969342B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008229467A (en) * | 2007-03-20 | 2008-10-02 | Daifuku Co Ltd | Heat treatment apparatus |
| CN108927492A (en) * | 2018-08-16 | 2018-12-04 | 全椒县全动机械有限公司 | A kind of cast steel intermediate product of diesel engine manufacturing process |
| CN111637738A (en) * | 2020-06-05 | 2020-09-08 | 北京北方华创微电子装备有限公司 | Furnace door control device for vertical furnace and vertical furnace |
| CN214193369U (en) * | 2020-12-25 | 2021-09-14 | 河南沃福德环保科技有限公司 | Trolley type resistance furnace with furnace body capable of being positioned and lifted |
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| Publication number | Publication date |
|---|---|
| CN113969342A (en) | 2022-01-25 |
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