CN113787164B - Method for manufacturing connecting nut blank for hydraulic system of engineering equipment - Google Patents
Method for manufacturing connecting nut blank for hydraulic system of engineering equipment Download PDFInfo
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- CN113787164B CN113787164B CN202110966203.6A CN202110966203A CN113787164B CN 113787164 B CN113787164 B CN 113787164B CN 202110966203 A CN202110966203 A CN 202110966203A CN 113787164 B CN113787164 B CN 113787164B
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- hydraulic system
- engineering equipment
- connecting nut
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/64—Making machine elements nuts
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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
- B21J5/008—Incremental forging
-
- 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
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a manufacturing method of a connecting nut blank for an engineering equipment hydraulic system, which is characterized in that the connecting nut blank for the engineering equipment hydraulic system is directly manufactured through cold extrusion six-die manufacturing, the appearance structure of the connecting nut blank for the engineering equipment hydraulic system comprises a regular hexagonal prism main body, two ends of the connecting nut blank for the engineering equipment hydraulic system are cylindrical ends which are concentric with the regular hexagonal prism main body and internally tangent with a regular hexagonal outline of the cross section of the regular hexagonal prism main body, and a central hole of the connecting nut blank for the engineering equipment hydraulic system is a step hole. The method can improve the utilization rate and quality of raw materials and the production efficiency, and has high appearance quality and high product strength.
Description
Technical Field
The invention relates to the technical field of multi-station cold heading, in particular to a manufacturing method of a connecting nut blank for an oil hydraulic system of engineering equipment.
Background
With the continuous progress of industrial economy at home and abroad, the connecting device for engineering equipment oil hydraulic systems such as a plastic machine, a digging machine, an automobile and the like is rapidly developed, the appearance structure of the connecting nut blank for the engineering equipment oil hydraulic system comprises a regular hexagonal prism main body, two ends of the connecting nut blank for the engineering equipment oil hydraulic system are cylindrical ends which are concentric with the regular hexagonal prism main body and inscribe with the regular hexagonal outline of the cross section of the regular hexagonal prism main body, and the central hole of the connecting nut blank for the engineering equipment oil hydraulic system is a stepped hole, wherein the length of a large central hole section with a larger diameter extends from the first end of the connecting nut blank for the engineering equipment oil hydraulic system to be close to the second end, and the ratio of the length of a small central hole section with a smaller diameter to the length of the cylindrical end of the second end is 1.5-2.5:1.
The connecting nuts for the oil pressure systems of engineering equipment in the market at present are all in the shape of hexagonal nuts by cold heading, and then are machined, so that the machining speed is low, the cost is high, and the material waste is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a manufacturing method of a connecting nut blank for an oil hydraulic system of engineering equipment, which can directly manufacture the connecting nut for the oil hydraulic system of the engineering equipment by a multi-station cold extrusion method, thereby improving the utilization rate and quality of raw materials and improving the production efficiency. For this purpose, the invention adopts the following technical scheme:
the method for manufacturing the connecting nut blank for the hydraulic system of the engineering equipment is characterized in that the appearance structure of the method for manufacturing the connecting nut for the hydraulic system of the engineering equipment comprises a regular hexagonal prism main body, two ends of the connecting nut blank for the hydraulic system of the engineering equipment are cylindrical ends which are concentric with the regular hexagonal prism main body and inscribe with the regular hexagonal outline of the cross section of the regular hexagonal prism main body, a central hole of the connecting nut blank for the hydraulic system of the engineering equipment is a stepped hole, wherein the length of a large central hole section with a larger diameter extends from the first end of the connecting nut blank for the hydraulic system of the engineering equipment to be close to the second end, and the ratio of the length of a small central hole section with a smaller diameter to the length of the cylindrical end of the second end is 1.5-2.5:1;
the manufacturing method comprises the following steps:
(1) Feeding a disc round material into a cold heading forming machine, automatically cutting the disc round material into a single connecting nut blank raw material piece for an oil hydraulic system of engineering equipment, wherein the diameter of the disc round material is smaller than that of the cylindrical end, and the length of the raw material piece is shorter than that of a regular hexagonal prism main body;
(2) Transferring the raw material piece into a first die port of a cold heading forming machine, ejecting the raw material piece into the first die by a punching tool at the front end of the first die, and manufacturing the raw material piece by cold heading in the first die, so that the front end of a first molded finished product is headed out of a first central positioning hole, and the rear end of the first molded finished product is headed out of a second central positioning hole and a round angle;
(3) The first molded finished product is turned and transferred to a second die opening, the first molded finished product is ejected into the second die by a punching tool at the front end of the second die, and is manufactured by cold heading in the second die, so that the front end of the second molded finished product is leveled under the condition of reserving a second center positioning hole, and the rear end is headed with a round angle on the basis of reserving a first center positioning hole;
(4) The method comprises the steps of transferring a second molded finished product to a third mold opening, ejecting the second molded finished product into the third mold by a punching tool at the front end of the third mold, and manufacturing the third molded finished product by cold heading in the third mold, so that a front-shaped hole with a large central hole section is formed at the front end of the third molded finished product, the main body of the third molded finished product is in a regular hexagonal prism shape consistent with the outer profile of the cross section of a regular hexagonal prism main body of a connecting nut blank for an engineering equipment hydraulic system, and a circle of conical surfaces are respectively formed at the outer sides of the two ends of the third molded finished product, wherein the conical surface positioned at the outer side of the rear end is longer than the axial length of the conical surface positioned at the outer side of the front end;
(5) The method comprises the steps of transferring a third molded finished product to a fourth die opening, ejecting the third molded finished product into the fourth die by a punch at the front end of the fourth die, manufacturing the third molded finished product by cold heading in the fourth die, wherein a rear end beam rod of the fourth molded finished product is a cylindrical end of a first end of a connecting nut blank for an engineering equipment hydraulic system and deepens a front-shaped hole of a large central hole section, forming a front-shaped hole of a small central hole section at the front end of the fourth molded finished product and reducing the axial length of a conical surface of the end, wherein the diameter of the front-shaped hole of the small central hole section is consistent with that of the small central hole section, and the depth is shorter than the length of the small central hole section;
(6) The method comprises the steps of transferring a fourth molded finished product to a fifth mold opening, ejecting the fourth molded finished product into the fifth mold by a punching tool at the front end of the fifth mold, upsetting the fifth molded finished product into a large central hole section on the basis of a front-shaped hole of the large central hole section through cold upsetting in the fifth mold, upsetting a regular hexagonal prism main body of the fifth molded finished product to be the length of a regular hexagonal prism main body of a connecting nut blank for an engineering equipment oil hydraulic system, and bundling a rear end bundled rod of the fifth molded finished product to be a cylindrical end of a second end of the connecting nut blank for the engineering equipment oil hydraulic system;
(7) And turning and transferring the molded product No. five to a mold opening No. six, ejecting the molded product No. five into the mold No. six by a punching tool at the front end of the mold No. six, punching an iron core to form a small central hole section, and manufacturing a connecting nut blank for the hydraulic system of engineering equipment.
According to the invention, through reasonable station task arrangement, a full-automatic 6-station forming machine is adopted, and through reverse cold extrusion, round holes with the size of a product are formed at one time to manufacture a connecting nut for an oil pressure system of engineering equipment; the cold extrusion makes the blank plastically deformed, changes its shape, and the streamline is not broken, so that it can raise the mechanical property of product and ensure the quality of product. Compared with the prior art, the invention omits the process of turning the outer diameter and the flat head at the two ends, and has stable size. The speed is improved by 2-4 times than the original process speed; 45g of the material is needed in the original processing mode, and only 39g of the material is needed, so that 13.4% of the material can be saved, and the cost is greatly reduced.
Drawings
FIG. 1 is a schematic illustration of a process flow of the manufacturing method of the present invention.
Fig. 2 is a bottom view of a fifth molded article.
Fig. 3 is a top view of a sixth molded product, namely, a coupling nut blank for an hydraulic system of an engineering apparatus manufactured by the present invention.
Detailed Description
Reference is made to the accompanying drawings. The connecting nut blank 6 for the hydraulic system of the engineering equipment, which is manufactured by the invention, has the external structure comprising a regular hexagonal prism main body 60, two ends of the connecting nut blank 6 for the hydraulic system of the engineering equipment are provided with cylindrical ends 61 and 62 which are concentric with the regular hexagonal prism main body 60 and inscribe with the regular hexagonal outline of the cross section of the regular hexagonal prism main body 60, and a central hole of the connecting nut blank 6 for the hydraulic system of the engineering equipment is a stepped hole, wherein the length of a large central hole section 63 with larger diameter extends from the first end of the connecting nut blank 6 for the hydraulic system of the engineering equipment to the position close to the second end, a small central hole section 64 with smaller diameter is positioned at the second section, and the ratio of the length of the small central hole section to the length of the cylindrical end 62 at the second end is 1.5-2.5:1.
The manufacturing method comprises the steps of performing heat treatment and spheroidization on a round plate material, performing phosphate surface treatment, performing fine drawing and sizing treatment, and performing cold extrusion manufacturing in the following steps:
(1) The method comprises the steps of feeding a disc material into a cold heading forming machine, automatically cutting the disc material into a single connecting nut blank raw material piece 100 for an engineering equipment hydraulic system, wherein the diameter of the disc material is smaller than that of a cylindrical end, and the length of the raw material piece 100 is shorter than that of a regular hexagonal prism main body 6.
(2) The raw material piece 100 is moved into a first die port of a six-station cold heading forming machine, the punching tool at the front end of the first die pushes the raw material piece 100 into the first die, and the front end of the first molded finished product 1 is headed out of a first central positioning hole 11 and the rear end is headed out of a second central positioning hole 12 and a round corner 13 through cold heading manufacturing in the first die.
(3) And the first molded product 1 is turned and transferred to a second die opening, the first molded product 1 is ejected into the second die by a punch at the front end of the second die, and is manufactured by cold heading in the second die, so that the front end of the second molded product 2 is leveled under the condition of keeping the second central positioning hole 12, and the rear end is headed with a round angle 21 on the basis of keeping the first central positioning hole 11. For cold heading of the first and second dies, the cylinder diameters of the first and second molded products 1 and 2 remain unchanged, consistent with the diameter of the stock piece 100, at most only with natural slight differences due to the sleeve die.
(4) The second molded product 2 is turned and transferred to a third mold opening, the second molded product 2 is ejected into the third mold by a punch at the front end of the third mold, and is manufactured by cold heading in the third mold, so that the front end of the third molded product 3 forms a front-shaped hole 31 of a large central hole section 63, the diameter of the front-shaped hole 31 is consistent with or slightly smaller than the diameter of the large central hole section 63, the main body of the third molded product 3 is in a regular hexagonal prism shape 32 consistent with the outer cross section contour of a regular hexagonal prism main body 60 of a connecting nut blank 6 for an engineering equipment hydraulic system, and the outer sides of two ends of the third molded product 3 respectively form a circle of conical surfaces, wherein the conical surface 34 positioned at the outer side of the rear end is larger than the axial length of the conical surface 33 positioned at the outer side of the front end. The depth of the front shaped aperture 31 is substantially identical to the length of the cylindrical end 61 of the first end. The external profiles of the cross sections of the regular hexagonal prisms of the main bodies of the third molded product 3, the fourth molded product 4 and the fifth molded product 5 are kept unchanged, and at most, the external profiles of the cross sections of the regular hexagonal prisms of the connecting nut blank 6 for the hydraulic system of engineering equipment are consistent only because of natural slight differences generated by the sleeve mold.
(5) The third molded product 3 is turned and transferred to a fourth die opening, the third molded product is jacked into the fourth die by a punching tool at the front end of the fourth die, the third molded product is manufactured by cold heading in the fourth die, a rear end beam rod of the fourth molded product 4 is a cylindrical end 61 of a first end of a connecting nut blank for an engineering equipment hydraulic system and deepens a front-shaped hole 31 of a large central hole section 63, and the number of the deepened front-shaped hole is 41; meanwhile, the front hole 42 of the small central hole section 64 is formed at the front end of the fourth molded product, the axial length of the conical surface 34 is reduced, the conical surface after the reduction is denoted by the reference numeral 43, the diameter of the front hole 42 of the small central hole section is consistent with the diameter of the small central hole section 64, and the depth is shorter than the length of the small central hole section 64.
(6) The fourth molded product 4 is turned and transferred to a fifth die opening, the fourth molded product 4 is ejected into the fifth die by a punch at the front end of the fifth die, the fifth molded product is made by cold heading in the fifth die, the fifth molded product is headed into a large central hole section 63 on the basis of a front-shaped hole 41 of the large central hole section, the regular hexagonal prism main body of the fifth molded product 5 is mounded to be the length of the regular hexagonal prism main body 60 of the connecting nut blank 6 for the engineering equipment hydraulic system, and the rear end of the fifth molded product 5 is bunched to be a cylindrical end 62 of the second end of the connecting nut blank 6 for the engineering equipment hydraulic system
(7) And (3) transferring the molded product 5 to a mold port No. six, ejecting the molded product 5 into the mold No. six by a punching tool at the front end of the mold No. six, and forming a small central hole section 64 through an iron core 101 to manufacture the connecting nut blank 6 for the hydraulic system of engineering equipment.
The above embodiments are merely examples of the present invention, but the present invention is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present invention.
Claims (1)
1. The method for manufacturing the connecting nut blank for the hydraulic system of the engineering equipment is characterized in that the appearance structure of the method for manufacturing the connecting nut for the hydraulic system of the engineering equipment comprises a regular hexagonal prism main body, two ends of the connecting nut blank for the hydraulic system of the engineering equipment are cylindrical ends which are concentric with the regular hexagonal prism main body and inscribe with the regular hexagonal outline of the cross section of the regular hexagonal prism main body, a central hole of the connecting nut blank for the hydraulic system of the engineering equipment is a stepped hole, wherein the length of a large central hole section with a larger diameter extends from the first end of the connecting nut blank for the hydraulic system of the engineering equipment to be close to the second end, and the ratio of the length of a small central hole section with a smaller diameter to the length of the cylindrical end of the second end is 1.5-2.5:1;
the manufacturing method comprises the following steps:
(1) Feeding a disc round material into a cold heading forming machine, automatically cutting the disc round material into a single connecting nut blank raw material piece for an oil hydraulic system of engineering equipment, wherein the diameter of the disc round material is smaller than that of the cylindrical end, and the length of the raw material piece is shorter than that of a regular hexagonal prism main body;
(2) Transferring the raw material piece into a first die port of a cold heading forming machine, ejecting the raw material piece into the first die by a punching tool at the front end of the first die, and manufacturing the raw material piece by cold heading in the first die, so that the front end of a first molded finished product is headed out of a first central positioning hole, and the rear end of the first molded finished product is headed out of a second central positioning hole and a round angle;
(3) The first molded finished product is turned and transferred to a second die opening, the first molded finished product is ejected into the second die by a punching tool at the front end of the second die, and is manufactured by cold heading in the second die, so that the front end of the second molded finished product is leveled under the condition of reserving a second center positioning hole, and the rear end is headed with a round angle on the basis of reserving a first center positioning hole;
(4) The method comprises the steps of transferring a second molded finished product to a third mold opening, ejecting the second molded finished product into the third mold by a punching tool at the front end of the third mold, and manufacturing the third molded finished product by cold heading in the third mold, so that a front-shaped hole with a large central hole section is formed at the front end of the third molded finished product, the main body of the third molded finished product is in a regular hexagonal prism shape consistent with the outer profile of the cross section of a regular hexagonal prism main body of a connecting nut blank for an engineering equipment hydraulic system, and a circle of conical surfaces are respectively formed at the outer sides of the two ends of the third molded finished product, wherein the conical surface positioned at the outer side of the rear end is longer than the axial length of the conical surface positioned at the outer side of the front end;
(5) The method comprises the steps of transferring a third molded finished product to a fourth die opening, ejecting the third molded finished product into the fourth die by a punch at the front end of the fourth die, manufacturing the third molded finished product by cold heading in the fourth die, wherein a rear end beam rod of the fourth molded finished product is a cylindrical end of a first end of a connecting nut blank for an engineering equipment hydraulic system and deepens a front-shaped hole of a large central hole section, forming a front-shaped hole of a small central hole section at the front end of the fourth molded finished product and reducing the axial length of a conical surface of the end, wherein the diameter of the front-shaped hole of the small central hole section is consistent with that of the small central hole section, and the depth is shorter than the length of the small central hole section;
(6) The method comprises the steps of transferring a fourth molded finished product to a fifth mold opening, ejecting the fourth molded finished product into the fifth mold by a punching tool at the front end of the fifth mold, upsetting the fifth molded finished product into a large central hole section on the basis of a front-shaped hole of the large central hole section through cold upsetting in the fifth mold, upsetting a regular hexagonal prism main body of the fifth molded finished product to be the length of a regular hexagonal prism main body of a connecting nut blank for an engineering equipment oil hydraulic system, and bundling a rear end bundled rod of the fifth molded finished product to be a cylindrical end of a second end of the connecting nut blank for the engineering equipment oil hydraulic system;
(7) And turning and transferring the molded product No. five to a mold opening No. six, ejecting the molded product No. five into the mold No. six by a punching tool at the front end of the mold No. six, punching an iron core to form a small central hole section, and manufacturing a connecting nut blank for the hydraulic system of engineering equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966203.6A CN113787164B (en) | 2021-08-23 | 2021-08-23 | Method for manufacturing connecting nut blank for hydraulic system of engineering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966203.6A CN113787164B (en) | 2021-08-23 | 2021-08-23 | Method for manufacturing connecting nut blank for hydraulic system of engineering equipment |
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| Publication Number | Publication Date |
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| CN113787164A CN113787164A (en) | 2021-12-14 |
| CN113787164B true CN113787164B (en) | 2023-07-07 |
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| CN202110966203.6A Active CN113787164B (en) | 2021-08-23 | 2021-08-23 | Method for manufacturing connecting nut blank for hydraulic system of engineering equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB438725A (en) * | 1934-05-22 | 1935-11-22 | Nat Machinery Co | Improvements in or relating to the manufacture of nuts or the like |
| SU1708485A1 (en) * | 1989-07-18 | 1992-01-30 | Научно-Производственное Объединение По Кузнечно-Прессовому Оборудованию И Гибким Производственным Системам Для Обработки Давлением "Эникмаш" | Method for cold stamping of hexagonal nut billets |
| JP2009202229A (en) * | 2008-02-28 | 2009-09-10 | Sakamura Mach Co Ltd | Press forming method of parts |
| CN101618498A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Manufacturing process of adjusting nut |
| JP2012179651A (en) * | 2011-03-01 | 2012-09-20 | Sakamura Hot Art Co Ltd | Method of manufacturing flange nut |
| CN110586845A (en) * | 2019-08-29 | 2019-12-20 | 宁波安拓实业有限公司 | Manufacturing method of large square nut for automobile chassis connecting system |
-
2021
- 2021-08-23 CN CN202110966203.6A patent/CN113787164B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB438725A (en) * | 1934-05-22 | 1935-11-22 | Nat Machinery Co | Improvements in or relating to the manufacture of nuts or the like |
| SU1708485A1 (en) * | 1989-07-18 | 1992-01-30 | Научно-Производственное Объединение По Кузнечно-Прессовому Оборудованию И Гибким Производственным Системам Для Обработки Давлением "Эникмаш" | Method for cold stamping of hexagonal nut billets |
| JP2009202229A (en) * | 2008-02-28 | 2009-09-10 | Sakamura Mach Co Ltd | Press forming method of parts |
| CN101618498A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Manufacturing process of adjusting nut |
| JP2012179651A (en) * | 2011-03-01 | 2012-09-20 | Sakamura Hot Art Co Ltd | Method of manufacturing flange nut |
| CN110586845A (en) * | 2019-08-29 | 2019-12-20 | 宁波安拓实业有限公司 | Manufacturing method of large square nut for automobile chassis connecting system |
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| CN113787164A (en) | 2021-12-14 |
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