CN112935167A - Electronic kiln feeding equipment and hold fever board thereof - Google Patents
Electronic kiln feeding equipment and hold fever board thereof Download PDFInfo
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- CN112935167A CN112935167A CN202110246426.5A CN202110246426A CN112935167A CN 112935167 A CN112935167 A CN 112935167A CN 202110246426 A CN202110246426 A CN 202110246426A CN 112935167 A CN112935167 A CN 112935167A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J17/00—Forge furnaces
- B21J17/02—Forge furnaces electrically heated
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Abstract
The invention relates to the technical field of supporting facilities of electronic kilns, in particular to feeding equipment of an electronic kiln and a burning bearing plate thereof. An electronic kiln feeding device comprises a frame and a pier extruding device. The pier extruding device comprises a burning bearing plate, an upper pressure rod, a lower pressure rod, a movable pressing block and a hydraulic system. The burning board is arranged on the bracket, and a second chamber with a square cross section outline is arranged in the burning board. The hydraulic system comprises a hydraulic cylinder, a piston, an oil inlet channel and a one-way valve. According to the electronic kiln feeding equipment, the periphery of the preset square metal blank is extruded before the metal blank is extruded and upset to be formed, and then the middle of the preset square metal blank is extruded, so that the transverse difference and the longitudinal difference of the internal structure of the metal blank after being formed are reduced, the longitudinal crack and the transverse crack are avoided, and the reliability of the metal blank is high. And compared with the traditional method of manufacturing a cylinder, the method of manufacturing the metal blank into the square body also avoids the waste of the metal blank and saves a large amount of cost.
Description
Technical Field
The invention relates to the technical field of supporting facilities of electronic kilns, in particular to feeding equipment of an electronic kiln and a burning bearing plate thereof.
Background
The electronic kiln mentioned above is a dedicated facility for firing electronic powder materials for manufacturing electronic components, but is not limited to tunnel kiln and chamber furnace for firing (also called sintering) electronic products, such as ceramic inductance substrates, ceramic dielectric substrates, PTC (positive temperature coefficient thermistor), NTC (negative temperature coefficient thermistor), magnetic material green bodies, magnetic material powder, lithium iron phosphate powder, and various kinds of powder for electronic products, and so on.
In the process of firing electronic products by using an electronic kiln, a feeding device is generally used, and a metal blank of the electronic product to be fired in the kiln is fed to a conveying belt by the feeding device, and then the metal blank is introduced into a hearth of the electronic kiln by the conveying belt to be sintered and formed, and then various types of products are manufactured. The traditional metal blank needs repeated extrusion and upsetting in the sintering and forming processes, so that the process can effectively refine the microstructure of a sintered sample and improve the comprehensive mechanical property of the sintered sample under the condition of keeping the initial shape of the blank unchanged. However, in order to ensure the transverse mechanical property and the anisotropic property of the metal blank, the metal blank is usually upset into a cylinder during upsetting in the conventional hydraulic equipment or sintering equipment, but the cylindrical metal blank is difficult to be subsequently processed, and the cut leftover materials are more, which causes waste. If the metal blank is forced into a square, longitudinal cracks can be generated in the upsetting process due to the fact that the distances between the outer edges of the square and the vertical center line are different, and the metal blank is scrapped.
Disclosure of Invention
The invention provides feeding equipment of an electronic kiln and a burning bearing plate thereof, which aim to solve the problem that the existing metal blank cannot be fully utilized.
The invention relates to an electronic kiln feeding device and a burning bearing plate thereof, which adopt the following technical scheme:
an electronic kiln feeding device comprises a frame and a pier extruding device. The pier extruding device comprises a burning bearing plate, an upper pressure rod, a lower pressure rod, a movable pressing block and a hydraulic system. The burning bearing plate is arranged on the support, a first cavity and a second cavity which are communicated up and down and coaxially arranged are arranged in the burning bearing plate, and the cross section of the second cavity is square; the cross-sectional area of the second chamber is greater than the cross-sectional area of the first chamber; the upper pressure lever can be movably arranged on the frame up and down, and the lower end of the upper pressure lever is inserted into the first cavity; the upper end of the lower pressure rod is provided with a square extrusion head, the square extrusion head is positioned in the second chamber, a storage chamber with an upward opening is arranged inside the square extrusion head, and the cross section profile of the storage chamber is the same as that of the first chamber; the movable pressing block is arranged in the storage cavity, when the movable pressing block is located at the lowest position of the movable pressing block relative to the lower pressing rod, the upper surface of the movable pressing block is flush with the upper end face of the lower pressing rod, and the movable pressing block can slide in the first cavity and the storage cavity.
The hydraulic system comprises a hydraulic cylinder, a piston, an oil inlet channel and a one-way valve; the hydraulic cylinder is arranged on the frame and is positioned below the burning bearing plate, and the bottom of the hydraulic cylinder is externally connected with an oil pump; the piston is arranged at the lower end of the lower pressure rod and is positioned in the hydraulic cylinder; the oil inlet channel is communicated with the lower side of the piston and the storage cavity and comprises a first channel, an expansion cavity and a second channel which are sequentially arranged from bottom to top; the cross-sectional area of the second passage is less than the cross-sectional area of the expansion chamber; the check valve passes through the connecting rod to be installed in the activity briquetting, and the up end of activity briquetting is in the top of the up end of depression bar down, and the distance between the up end of activity briquetting and the up end of depression bar down is greater than when predetermineeing the distance, and the check valve is located the second passageway and only allows hydraulic oil to get into from the downside of piston and stores the chamber, and when the up end of activity briquetting was parallel and level with the up end of depression bar down, the check valve was located the inflation intracavity and allows hydraulic oil to get into the downside of piston from storing the chamber via the clearance between check valve and the inflation chamber.
Further, the storage cavity comprises a third cavity and a fourth cavity which are coaxially arranged, the cross section contour of the third cavity is the same as that of the first cavity, and the area of the cross section of the fourth cavity is smaller than that of the third cavity; the movable pressing block comprises an extrusion section and a connecting section, and the maximum height of the extrusion section does not exceed the height of the extrusion section. And when the movable pressing block is located at the lowest position of the movable pressing block relative to the lower pressing rod, the joint of the extrusion section and the connecting section is flush with the lower end face of the third chamber, and a distance is reserved between the lower surface of the connecting section and the bottom face of the fourth chamber.
Further, the cross-sectional profiles of the first, third and fourth chambers are circular.
Further, the upper end opening of the second passage is provided with a stop ring to prevent the check valve from sliding out of the second passage.
Furthermore, the feeding equipment of the electronic kiln further comprises a heating device, wherein the heating device is arranged on the rack and heats the metal blank through the burning bearing plate.
Further, the cross-sectional area of the first passage is less than the cross-sectional area of the expansion chamber; the cross-sectional area of the second passage is greater than the cross-sectional area of the first passage.
The outer contour of the cross section of the burning bearing plate is circular, a first cavity and a second cavity which are communicated up and down and are coaxially arranged are formed in the burning bearing plate, and the cross section of the second cavity is square. The cross-sectional area of the second chamber is greater than the cross-sectional area of the first chamber.
Further, the cross-sectional profile of the first chamber is circular, the diameter of the circle being smaller than the side length of the square.
The invention has the beneficial effects that: the feeding equipment of the electronic kiln can overcome the defect that the traditional extrusion upsetting device cannot upset metal blanks into square bodies when extruding and upsetting the metal blanks. Specifically, according to the feeding equipment for the electronic kiln, the periphery of the preset square metal blank is extruded before the metal blank is extruded and subjected to upsetting forming, and then the middle of the preset square metal blank is extruded, so that the transverse difference and the longitudinal difference of the internal structure of the metal blank after forming are reduced, longitudinal cracks and transverse cracks are avoided, the mass difference between the periphery and the center of the square metal blank is reduced, and the reliability of the metal blank is high. And compared with the traditional method of manufacturing a cylinder, the method of manufacturing the metal blank into the square body also avoids the waste of the metal blank and saves a large amount of cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a sectional view of a pier extruding device of an embodiment of the feeding equipment of the electronic kiln.
Fig. 2 is a partial exploded view of a pier extruding device of an embodiment of the feeding equipment of the electronic kiln.
Fig. 3 is a schematic structural diagram of a lower pressing rod of a pier extruding device according to an embodiment of the feeding equipment of the electronic kiln.
Fig. 4 is a schematic structural diagram of a bearing plate of a pier extruding device according to an embodiment of the feeding equipment of the electronic kiln.
Fig. 5 is a partial state diagram of a first stage of the operation of the pier extruding device of the embodiment of the electronic kiln feeding equipment.
Fig. 6 is a partial state diagram of a second stage of the operation of the upsetting device of the embodiment of the feeding equipment of the electronic kiln.
Fig. 7 is a partial state view of a third stage in operation of the pier extruding device of the embodiment of the electronic kiln feeding equipment of the invention.
In the figure: 1. a setter plate; 11. a first chamber; 12. a second chamber; 2. an upper pressure lever; 21. a square extrusion head; 22. a third chamber; 23. a fourth chamber; 3. a hydraulic cylinder; 31. a lower pressure lever; 32. a piston; 33. a one-way valve; 34. an oil liquid port; 35. a connecting rod; 41. a first channel; 42. an expansion chamber; 43. a second channel; 5. a movable pressing block; 6. a metal blank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the feeding device of the electronic kiln, as shown in fig. 1 to 7, the feeding device of the electronic kiln comprises a frame (not shown) and a pier extruding device. The pier extruding device comprises a burning bearing plate 1, an upper pressure rod 2, a lower pressure rod 31, a movable pressing block 5 and a hydraulic system. The burning board 1 is arranged on the bracket, a first cavity 11 and a second cavity 12 which are communicated up and down and coaxially arranged are arranged in the burning board 1, and the cross section outline of the second cavity 12 is square. The cross-sectional area of the second chamber 12 is larger than the cross-sectional area of the first chamber 11. The upper pressure lever 2 can be movably arranged on the frame up and down, and the lower end of the upper pressure lever 2 is inserted into the first chamber 11. The upper end of the lower pressure rod 31 is provided with a square extrusion head 21, the square extrusion head 21 is positioned in the second chamber 12, the square extrusion head 21 is internally provided with a storage cavity with an upward opening, and the cross section contour of the storage cavity is the same as that of the first chamber 11. The movable pressing block 5 is arranged in the storage cavity, when the movable pressing block 5 is located at the lowest position of the movable pressing block 5 relative to the lower pressing rod 31, the upper surface of the movable pressing block 5 is flush with the upper end surface of the lower pressing rod 31, and the movable pressing block 5 can slide in the first cavity 11 and the storage cavity.
The hydraulic system comprises a hydraulic cylinder 3, a piston 32, an oil inlet channel and a non-return valve 33. The pneumatic cylinder 3 is installed in the frame, and is in the below of holding fever board 1, and the external oil pump of fluid opening 34 is passed through to the bottom of pneumatic cylinder 3. The piston 32 is mounted to the lower end of the lower pressing rod 31 and is located inside the hydraulic cylinder 3. The oil inlet passage communicates the lower side of the piston 32 with the reservoir chamber, and includes a first passage 41, an expansion chamber 42, and a second passage 43 that are provided in this order from the bottom up. The cross-sectional area of the second passage 43 is smaller than the cross-sectional area of the expansion chamber 42. The cross-sectional area of the first passage 41 is smaller than the cross-sectional area of the expansion chamber 42. The cross-sectional area of the second passage 43 is larger than the cross-sectional area of the first passage 41. The check valve 33 is installed at the lower end of the movable pressing block 5 through the connecting rod 35, the upper end face of the movable pressing block 5 is located above the upper end face of the lower pressing rod 31, and when the distance between the upper end face of the movable pressing block 5 and the upper end face of the lower pressing rod 31 is larger than a preset distance, the check valve 33 is located in the second channel 43 and only allows hydraulic oil to enter the storage cavity from the lower side of the piston 32, and when the upper end face of the movable pressing block 5 is flush with the upper end face of the lower pressing rod 31, the check valve 33 is located in the expansion cavity 42 and allows the hydraulic oil to enter the lower side of the piston 32 from the storage cavity through a gap between the check valve 33 and the expansion cavity 42.
In this embodiment, the reservoir comprises a third chamber 22 and a fourth chamber 23 arranged coaxially, the third chamber 22 having a cross-sectional profile identical to the cross-sectional profile of the first chamber 11, the fourth chamber 23 having a cross-sectional area smaller than the cross-sectional area of the third chamber 22. The movable pressing block 5 comprises an extrusion section and a connection section, the maximum height of the extrusion section does not exceed the height of the extrusion section, and the metal powder 6 is prevented from entering the third chamber 22 when the lower pressing rod 31 and the movable pressing block 5 integrally descend. And when the movable pressing block 5 is located at the lowest position of the movable pressing block 5 relative to the lower pressing rod 31, the joint of the extrusion section and the connecting section is flush with the lower end face of the third chamber 22, and a distance is reserved between the lower surface of the connecting section and the bottom face of the fourth chamber 23, so that the hydraulic oil has enough compression space.
In this embodiment, the cross-sectional profiles of the first chamber 11, the third chamber 22 and the fourth chamber 23 are circular, facilitating the sliding of the movable pressure piece 5.
In the present embodiment, the upper end opening of the second passage 43 is provided with a stopper ring to prevent the check valve 33 from slipping out of the second passage 43.
In this embodiment, the feeding device of the electronic kiln further includes a heating device, the heating device is disposed on the frame, and heats the metal blank 6 through the burning board 1, so that the metal blank 6 is plastically deformed.
The outer contour of the cross section of a burning plate 1 used by feeding equipment of an electronic kiln is circular, a first cavity 11 and a second cavity 12 which are communicated up and down and are coaxially arranged are arranged in the burning plate 1, and the cross section contour of the second cavity 12 is square. The cross-sectional area of the second chamber 12 is larger than the cross-sectional area of the first chamber 11. The cross-sectional profile of the first chamber 11 is circular, the diameter of the circle being smaller than the side length of the square.
The metal blank heating device comprises three stages during use, in the first stage, a conveying belt introduces a metal blank 6 into a first cavity 11, an oil pump is started, hydraulic oil enters a hydraulic cylinder 3 from an oil liquid through hole 34, enters a fourth cavity 23 along an oil inlet channel and upwards pushes a movable pressing block 5, the movable pressing block 5 ascends along the cavity wall of a second cavity 12, the oil liquid through hole 34 is closed after a period of time, an upper pressing rod 2 downwards pre-presses the metal blank 6, the metal blank 6 is kept in the first cavity 11 under the action of the movable pressing block 5 and the upper pressing rod 2, and meanwhile, the heating device heats the metal blank 6 through a burning bearing plate 1.
And in the second stage, the oil liquid port 34 is opened, the hydraulic oil in the hydraulic cylinder 3 is pumped out by using an oil pump, the one-way valve 33 prevents the hydraulic oil from flowing downwards from the fourth chamber 23, so that the lower pressing rod 31 and the movable pressing block 5 synchronously move downwards, the oil liquid port 34 is closed again after the lower pressing rod moves downwards to the corresponding position, the lower pressing rod 31 stops moving, the upper pressing rod 2 continuously presses downwards, the pressing speed of the upper pressing rod 2 is higher than that of the lower pressing rod 31 and the movable pressing block 5, the metal blank 6 is kept in a pressed state, and when the upper end surface of the pressing section descends below the upper end surface of the second chamber 12, the metal blank 6 firstly enters the outer end surface of the pressing section, the cavity wall of the second chamber 12 and a cavity formed by the upper end surface of the square pressing head 21 under the pressing of the upper pressing rod 2.
In the third stage, the upper pressing rod 2 continues to press the metal blank 6 downwards, the metal blank 6 in the first chamber 11 presses the movable pressing block 5 downwards, and the movable pressing block presses the volume of the hydraulic oil below the connecting section, that is, the volume of the hydraulic oil in the fourth chamber 23 is compressed, so that the movable pressing block 5 slowly descends. When the check valve 33 connected to the movable pressing block 5 enters the expansion cavity 42, hydraulic oil enters the lower side of the piston 32 from the storage cavity through a gap between the check valve 33 and the expansion cavity 42, the upper pressing rod 2 continuously presses the metal blank 6 downwards, on one hand, the hydraulic oil entering the lower side of the piston 32 jacks up the lower pressing rod 31, on the other hand, the extrusion section is extruded to be flush with the upper end face of the third cavity 22, and the metal blank 6 is upset into a square shape.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides an electron kiln feeder equipment, includes the frame, its characterized in that: the device also comprises a pier extruding device;
the pier extruding device comprises a burning bearing plate, an upper pressure rod, a lower pressure rod, a movable pressing block and a hydraulic system;
the burning bearing plate is arranged on the support, a first cavity and a second cavity which are communicated up and down and coaxially arranged are arranged in the burning bearing plate, and the cross section of the second cavity is square; the cross-sectional area of the second chamber is greater than the cross-sectional area of the first chamber; the upper pressure lever can be movably arranged on the frame up and down, and the lower end of the upper pressure lever is inserted into the first cavity; the upper end of the lower pressure rod is provided with a square extrusion head, the square extrusion head is positioned in the second chamber, a storage chamber with an upward opening is arranged inside the square extrusion head, and the cross section profile of the storage chamber is the same as that of the first chamber; the movable pressing block is arranged in the storage cavity, when the movable pressing block is located at the lowest position of the movable pressing block relative to the lower pressing rod, the upper surface of the movable pressing block is flush with the upper end surface of the lower pressing rod, and the movable pressing block can slide in the first cavity and the storage cavity;
the hydraulic system comprises a hydraulic cylinder, a piston, an oil inlet channel and a one-way valve; the hydraulic cylinder is arranged on the frame and is positioned below the burning bearing plate, and the bottom of the hydraulic cylinder is externally connected with an oil pump; the piston is arranged at the lower end of the lower pressure rod and is positioned in the hydraulic cylinder; the oil inlet channel is communicated with the lower side of the piston and the storage cavity and comprises a first channel, an expansion cavity and a second channel which are sequentially arranged from bottom to top; the cross-sectional area of the second passage is less than the cross-sectional area of the expansion chamber; the check valve passes through the connecting rod to be installed in the activity briquetting, and the up end of activity briquetting is in the top of the up end of depression bar down, and the distance between the up end of activity briquetting and the up end of depression bar down is greater than when predetermineeing the distance, and the check valve is located the second passageway and only allows hydraulic oil to get into from the downside of piston and stores the chamber, and when the up end of activity briquetting was parallel and level with the up end of depression bar down, the check valve was located the inflation intracavity and allows hydraulic oil to get into the downside of piston from storing the chamber via the clearance between check valve and the inflation chamber.
2. The electronic kiln feeding device as defined in claim 1, wherein: the storage cavity comprises a third cavity and a fourth cavity which are coaxially arranged, the cross section profile of the third cavity is the same as that of the first cavity, and the area of the cross section of the fourth cavity is smaller than that of the third cavity; the movable pressing block comprises an extrusion section and a connecting section, when the movable pressing block is located at the lowest position of the movable pressing block relative to the lower pressing rod, the connection position of the extrusion section and the connecting section is flush with the lower end face of the third chamber, and the lower surface of the connecting section is spaced from the bottom face of the fourth chamber.
3. The electronic kiln feeding device as defined in claim 2, wherein: the maximum height of the extrusion section does not exceed the height of the extrusion section.
4. The electronic kiln feeding device as defined in claim 2, wherein: the cross-sectional profiles of the first, third and fourth chambers are circular.
5. The electronic kiln feeding device as defined in claim 1, wherein: the upper end opening of the second channel is provided with a stop ring to prevent the one-way valve from sliding out of the second channel.
6. The electronic kiln feeding device as defined in claim 1, wherein: the heating device is arranged on the rack and heats the metal blank through the burning bearing plate.
7. The electronic kiln feeding device as defined in claim 1, wherein: the cross-sectional area of the first passage is less than the cross-sectional area of the expansion chamber; the cross-sectional area of the second passage is greater than the cross-sectional area of the first passage.
8. The utility model provides a hold fever board that electronic kiln feeding equipment used which characterized in that: the outer contour of the cross section of the burning plate is circular, a first cavity and a second cavity which are communicated up and down and coaxially arranged are arranged in the burning plate, and the cross section contour of the second cavity is square; the cross-sectional area of the second chamber is greater than the cross-sectional area of the first chamber.
9. The electronic kiln feeding device as defined in claim 8, wherein: the cross-sectional profile of the first chamber is circular, the diameter of the circle being smaller than the side length of the square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246426.5A CN112935167B (en) | 2021-03-05 | 2021-03-05 | Electronic kiln feeding equipment and burning-bearing plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246426.5A CN112935167B (en) | 2021-03-05 | 2021-03-05 | Electronic kiln feeding equipment and burning-bearing plate thereof |
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| Publication Number | Publication Date |
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| CN112935167A true CN112935167A (en) | 2021-06-11 |
| CN112935167B CN112935167B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110246426.5A Active CN112935167B (en) | 2021-03-05 | 2021-03-05 | Electronic kiln feeding equipment and burning-bearing plate thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1053801A2 (en) * | 1999-05-18 | 2000-11-22 | FGU Forschungsgesellschaft Umformtechnik m.b.H. | Hydraulic closing-device for the lateral extrusion of workpieces |
| CN103217014A (en) * | 2013-04-11 | 2013-07-24 | 哈尔滨工业大学 | Composite crucible for casting titanium and titanium alloy in vacuum counter-gravity |
| CN103240378A (en) * | 2013-05-30 | 2013-08-14 | 上海保捷汽车零部件锻压有限公司 | Cold-forging mechanism for shaft parts of sedan double clutch transmission, and automatic system of cold-forging mechanism |
| CN205341770U (en) * | 2015-12-10 | 2016-06-29 | 重庆福悦安科技有限公司 | Parallel double -end cold -heading device |
| CN108380802A (en) * | 2018-03-30 | 2018-08-10 | 哈尔滨工业大学 | A kind of cycle revolving die squeezes upsetting building mortion and method |
| CN208333106U (en) * | 2018-05-25 | 2019-01-04 | 深圳陶金材料科技有限公司 | A kind of tube furnace improving burner hearth |
-
2021
- 2021-03-05 CN CN202110246426.5A patent/CN112935167B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1053801A2 (en) * | 1999-05-18 | 2000-11-22 | FGU Forschungsgesellschaft Umformtechnik m.b.H. | Hydraulic closing-device for the lateral extrusion of workpieces |
| CN103217014A (en) * | 2013-04-11 | 2013-07-24 | 哈尔滨工业大学 | Composite crucible for casting titanium and titanium alloy in vacuum counter-gravity |
| CN103240378A (en) * | 2013-05-30 | 2013-08-14 | 上海保捷汽车零部件锻压有限公司 | Cold-forging mechanism for shaft parts of sedan double clutch transmission, and automatic system of cold-forging mechanism |
| CN205341770U (en) * | 2015-12-10 | 2016-06-29 | 重庆福悦安科技有限公司 | Parallel double -end cold -heading device |
| CN108380802A (en) * | 2018-03-30 | 2018-08-10 | 哈尔滨工业大学 | A kind of cycle revolving die squeezes upsetting building mortion and method |
| CN208333106U (en) * | 2018-05-25 | 2019-01-04 | 深圳陶金材料科技有限公司 | A kind of tube furnace improving burner hearth |
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Effective date of registration: 20230531 Address after: 250000 Sanqing, No. 100, Gongye South Road, Lixia District, Jinan City, Shandong Province Room 1611, block a, Fengrun business building Applicant after: Jinan Yisida Automation Engineering Co.,Ltd. Address before: 436001 No.6, 3rd floor, gate 3, building 8, third village, iron mine workers Village, Zelin Town, Echeng District, Ezhou City, Hubei Province Applicant before: Cheng Guilan |
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