CN111468906A - Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank - Google Patents

Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank Download PDF

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Publication number
CN111468906A
CN111468906A CN202010389141.2A CN202010389141A CN111468906A CN 111468906 A CN111468906 A CN 111468906A CN 202010389141 A CN202010389141 A CN 202010389141A CN 111468906 A CN111468906 A CN 111468906A
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China
Prior art keywords
molten steel
smelting
hub
annular blank
machine
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Pending
Application number
CN202010389141.2A
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Chinese (zh)
Inventor
肖晓波
蔡璀靓
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肖晓波
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Priority to CN202010389141.2A priority Critical patent/CN111468906A/en
Publication of CN111468906A publication Critical patent/CN111468906A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02Stamping using rigid devices or tools
    • B21D22/022Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/26Making other particular articles wheels or the like
    • B21D53/268Making other particular articles wheels or the like wheels having spokes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/26Making other particular articles wheels or the like
    • B21D53/30Making other particular articles wheels or the like wheel rims
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00Centrifugal casting; Casting by using centrifugal force
    • B22D13/04Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry

Abstract

The invention discloses a manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank, wherein the blank is processed according to the weight and the volume of the steel automobile hub, and then is subjected to hot extrusion molding and hot spinning molding and finally molded; the invention combines thermoplastic molding to further strengthen the metallographic structure of the steel. The material quality of steel is improved by more than 50%, and the weight of the steel automobile hub is reduced by more than 20%. The purposes of high quality, high strength and light weight are achieved; the structure of the material is protected from being damaged by hot spinning stretching.

Description

Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank
Technical Field
The invention relates to the technical field of hub manufacturing, in particular to a manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank.
Background
The steel automobile wheel hub generally adopted in the market at present is formed by welding an automobile spoke and an automobile rim which are manufactured by cold pressing, cold spinning and cold punching of a formed steel plate.
The automobile spoke production technology is that a rectangular steel plate or a coiled plate with the thickness required by the spoke is processed by an oil press and a spinning machine to manufacture the spoke. The rectangular steel plate or coiled plate is fed into an oil press by a manual feeding machine, the oil press is used for cold stamping the steel plate or coiled plate into a circular blank with a specified size, the circular blank is manually fed into a next station oil pressure punching machine for cold stamping a central hole to form an annular blank. Then manually sending the annular blank to a spinning machine for cold spinning and stretching the annular blank to an outer circle to form a required arc shape. And then, manually conveying the arc-shaped blank to a multi-head drilling machine for drilling and milling a screw hole, then conveying to a punching machine for punching an air hole, and then conveying to an oil pressure shaping machine for carrying out die cavity finishing and forming. Then, the blank is sent to a vertical lathe for burr trimming and precise dimension correction. Thus, the finished automobile spoke is produced. The problems with such an operation are: (1) the material consumption is huge, the utilization rate of raw materials is only 60%, and redundant rough selvedge materials can only be processed according to scrap steel. The waste steel is recycled and rebuilt, which brings the problem of environmental protection and energy consumption. (2) The cold extrusion, cold stamping and cold spinning in the production process can cause different damages to raw steel, so that the potential safety hazards of different degrees appear in the use process of the automobile spoke. For example: (1) the fine cracks caused by the step of cold stamping the air holes can lead to the automobile spoke to be cracked in the using process, so that the hub is scrapped, the tire is damaged, and the great safety problem is brought. (2) After the cold spinning stretch forming in the production process is finished, the automobile spoke has good reaction in a static state. However, in the moving state, the thermal attraction is released due to friction heating, the radial strips of the automobile spokes become unstable, the tire is worn too fast or the tire burst phenomenon occurs, and the safety problem occurs.
There are two manufacturing techniques for automobile rims: one is roll forming before butt welding. One is butt welding and then rolling forming. Both are formed by welding. The disadvantages of such production techniques are: (1) the missing welding generates air leakage. (2) Welding points are easy to crack, the anti-fatigue degree is poor, automobile wheel hubs are scrapped, and potential safety hazards are brought.
And manufacturing the automobile hub by welding the automobile spoke and the automobile rim. The disadvantages are that: (1) in the welding process, the generated thermal gravitation enables the automobile spoke and the automobile rim to deform, the automobile spoke radial strip becomes unstable, the phenomenon of tire abrasion or tire burst occurs, and the safety problem is caused. (2) The phenomenon of infirm welding, welding missing or slag inclusion, welding contact cracking, hub scrapping and great potential safety hazard are caused. (3) The material consumption is large, and the automobile hub is heavy and poor in strength.
The problems of strength and light weight of the steel automobile hub can not be solved even if a thermoplastic molding process is used.
At present, three approaches are mainly used for realizing the light weight of the automobile, namely ⑴ structural optimization to thin the wall, hollowing, miniaturizing or compounding parts, ⑵ use of new materials, such as high-strength steel, aluminum, magnesium alloy and some non-metallic materials, and ⑶ process improvement, which mainly comprises a forming technology and a connecting technology, wherein the high-strength steel has the characteristics of high strength, light weight, low cost and the like, is beneficial to the light weight of the automobile, and can improve the safety.
Disclosure of Invention
The invention aims to solve the problems that: the manufacturing method for manufacturing the automobile hub by using the centrifugal casting annular blank is combined with thermoplastic molding to further strengthen the metallographic structure of steel. The material quality of steel is improved by more than 50%, and the weight of the steel automobile hub is reduced by more than 20%. The purposes of high quality, high strength and light weight are achieved.
The technical scheme provided by the invention for solving the problems is as follows: a manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank comprises the following steps,
(1) manufacturing a rim: sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting; after the molten steel is smelted, the molten steel is tested to reach the standard, and then the molten steel is weighed for later use according to the required volume and weight of the rim; pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine; placing the annular blank after molding into a rolling die of a rounding machine, and rounding and stretching the annular blank into a barrel-shaped blank; after the barrel-shaped blank reaches the required standard specification and diameter, entering a roll forming machine for roll forming to the required shape, performing burr repairing, and finishing the rim for standby;
(2) manufacturing the spoke: sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting; after the molten steel is smelted, the molten steel is tested to reach the standard, and then weighing is carried out for later use according to the required volume and weight of the spoke; pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine; after being formed, the annular blank enters a lower die of an oil press, and the lower die is extruded and subjected to hot shaping by an upper die; after the thermoplastic shape reaches the required standard specification, feeding the thermoplastic shape into a spinning machine for spinning forming; after spinning forming, drilling and milling a screw hole by using a multi-head drilling machine, and punching and milling an air hole; feeding the spoke into an oil press for fine shaping, and finishing the manufacturing of the spoke for later use;
(3) the rim and the spoke are combined into a hub: and carrying out butt welding after the spoke and the rim are coordinated, carrying out fine shaping, cleaning and surface antioxidant treatment on the hub after welding, and finishing the finished hub.
A manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank comprises the following steps,
(1) sorting raw materials, selecting raw materials meeting the requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting;
(2) after the molten steel after smelting is detected and tested to reach the standard, weighing for later use according to the required volume and weight of the hub;
(3) pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine;
(4) after the annular blank is formed, feeding the annular blank into an oil press for multiple thermoplastic forming;
(5) after the required standard specification is reached, placing a spinning machine for spinning forming;
(6) after molding, drilling and milling a screw hole and punching and milling an air hole by using a multi-head drilling machine;
(7) and after the hub reaches the specified size and is qualified through inspection, finishing, cleaning and surface oxidation resistance treatment are carried out to finish the finished hub.
Compared with the prior art, the invention has the advantages that:
1. uniform crystallization, fine crystal, good density, high strength and good toughness.
2. And the metallographic structure of the steel is further strengthened by combining thermoplastic molding. The material quality of steel is improved by more than 50%, and the weight of the steel automobile hub is reduced by more than 20%. The purposes of high quality, high strength and light weight are achieved.
3. The structure of the material is protected from being damaged by hot spinning stretching.
4. Energy conservation and consumption reduction. The material consumption is low, and the utilization rate of raw materials is more than 95%.
5. The economic benefit is high.
6. The invention adopts a flexible processing technology, does not cause processing damage to the hub, and can effectively improve the quality of the hub.
7. The welding mode or the non-welding mode can be flexibly applied.
8. The external limit of the centrifugal casting annular blank is low, and the centrifugal casting annular blank can be flexibly applied to a combined hub or an integrated hub.
Detailed Description
The embodiments of the present invention will be described in detail with reference to specific embodiments, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
In order to adapt to hubs of different models and different synthetic structure modes, the requirements of different varieties of centrifugal casting annular blanks are specially set to be adapted to:
secondly, respectively manufacturing the rim and the spoke by using a centrifugal casting annular blank mode to assemble the hub
1. Manufacture of wheel rims
1.1. Sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting;
1.2. after the molten steel is smelted, the molten steel is tested to reach the standard, and then the molten steel is weighed for later use according to the required volume and weight of the rim;
1.3. pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine;
1.4. placing the annular blank after molding into a rolling die of a rounding machine, and rounding and stretching the annular blank into a barrel-shaped blank;
1.5. after the barrel-shaped blank reaches the required standard specification and diameter, entering a roll forming machine for roll forming to the required shape, and performing burr repairing;
1.6. the rim is ready for use.
2. Manufacture of wheel spokes
2.1. Sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting;
2.2. after the molten steel is smelted, the molten steel is tested to reach the standard, and then weighing is carried out for later use according to the required volume and weight of the spoke;
2.3. pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine;
2.4. after being formed, the annular blank enters a lower die of an oil press, and the lower die is extruded and subjected to hot shaping by an upper die;
2.5. after the thermoplastic shape reaches the required standard specification, feeding the thermoplastic shape into a spinning machine for spinning forming;
2.6. after spinning forming, drilling and milling a screw hole by using a multi-head drilling machine, and punching and milling an air hole;
2.7. feeding into an oil press for fine shaping;
2.8. the spokes are completed for use.
3. Wheel hub formed by combining wheel rim and spoke
3.1. Carrying out butt welding after the spoke and the rim are coordinated, carrying out fine shaping, cleaning and surface antioxidant treatment on the hub after welding
3.2. And finishing the finished hub.
Secondly, manufacturing the integrated hub by using a centrifugal casting annular blank mode
1. Sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting;
2. after the molten steel is smelted, the molten steel is tested to reach the standard, and then the molten steel is weighed for later use according to the required volume and weight of the hub;
3. pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine;
4. after being formed, the annular blank enters an oil press for multiple thermoplastic forming;
5. after the required standard specification is reached, placing a spinning machine for spinning forming;
6. after molding, drilling and milling a screw hole and punching and milling an air hole by using a multi-head drilling machine;
7. after the specified size is detected to be qualified, finishing, cleaning and surface oxidation resistance treatment are carried out;
8. and finishing the finished hub.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.

Claims (2)

1. A manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank is characterized by comprising the following steps of: the method comprises the following steps of,
(1) manufacturing a rim: sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting; after the molten steel is smelted, the molten steel is tested to reach the standard, and then the molten steel is weighed for later use according to the required volume and weight of the rim; pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine; placing the annular blank after molding into a rolling die of a rounding machine, and rounding and stretching the annular blank into a barrel-shaped blank; after the barrel-shaped blank reaches the required standard specification and diameter, entering a roll forming machine for roll forming to the required shape, performing burr repairing, and finishing the rim for standby;
(2) manufacturing the spoke: sorting raw materials, selecting raw materials meeting requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting; after the molten steel is smelted, the molten steel is tested to reach the standard, and then weighing is carried out for later use according to the required volume and weight of the spoke; pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine; after being formed, the annular blank enters a lower die of an oil press, and the lower die is extruded and subjected to hot shaping by an upper die; after the thermoplastic shape reaches the required standard specification, feeding the thermoplastic shape into a spinning machine for spinning forming; after spinning forming, drilling and milling a screw hole by using a multi-head drilling machine, and punching and milling an air hole; feeding the spoke into an oil press for fine shaping, and finishing the manufacturing of the spoke for later use;
(3) the rim and the spoke are combined into a hub: and carrying out butt welding after the spoke and the rim are coordinated, carrying out fine shaping, cleaning and surface antioxidant treatment on the hub after welding, and finishing the finished hub.
2. A manufacturing method for manufacturing an automobile hub by using a centrifugal casting annular blank is characterized by comprising the following steps of: the method comprises the following steps of,
(1) sorting raw materials, selecting raw materials meeting the requirements for smelting, adding alloy into molten steel after smelting, and finishing smelting;
(2) after the molten steel after smelting is detected and tested to reach the standard, weighing for later use according to the required volume and weight of the hub;
(3) pouring the weighed molten steel into a centrifugal casting mold, and pouring into a required annular blank by using a centrifugal machine;
(4) after the annular blank is formed, feeding the annular blank into an oil press for multiple thermoplastic forming;
(5) after the required standard specification is reached, placing a spinning machine for spinning forming;
(6) after molding, drilling and milling a screw hole and punching and milling an air hole by using a multi-head drilling machine;
(7) and after the hub reaches the specified size and is qualified through inspection, finishing, cleaning and surface oxidation resistance treatment are carried out to finish the finished hub.
CN202010389141.2A 2020-05-09 2020-05-09 Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank Pending CN111468906A (en)

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CN202010389141.2A CN111468906A (en) 2020-05-09 2020-05-09 Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank

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CN202010389141.2A CN111468906A (en) 2020-05-09 2020-05-09 Manufacturing method for manufacturing automobile hub by using centrifugal casting annular blank

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2078636A (en) * 1980-05-12 1982-01-13 Competition Wheels Ltd A road wheel for a vehicle
JPH0596901A (en) * 1991-10-04 1993-04-20 Hitachi Metals Ltd Aluminum wheel and manufacture thereof
CN101020286A (en) * 2007-02-14 2007-08-22 嘉兴市四通车轮制造有限公司 Process of making integral automobile wheel
CN101579728A (en) * 2008-06-10 2009-11-18 万丰奥特控股集团有限公司 Centrifugal casting method and device of magnesium alloy hub
CN101722401A (en) * 2008-10-22 2010-06-09 上海保隆汽车科技股份有限公司 Process for manufacturing magnesium alloy wheel and process for manufacturing wheel rim of magnesium alloy wheel
CN102601338A (en) * 2012-03-21 2012-07-25 重庆大学 Method for producing large magnesium alloy ring by means of centrifugal casting
CN103056611A (en) * 2012-12-20 2013-04-24 河北立中有色金属集团有限公司 Magnesium alloy automobile hub casting spinning compound molding method
CN205184265U (en) * 2015-11-30 2016-04-27 内蒙古华唐伟业再生资源有限公司 System for be used for producing big minibus passenger train aluminum alloy wheel hub

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2078636A (en) * 1980-05-12 1982-01-13 Competition Wheels Ltd A road wheel for a vehicle
JPH0596901A (en) * 1991-10-04 1993-04-20 Hitachi Metals Ltd Aluminum wheel and manufacture thereof
CN101020286A (en) * 2007-02-14 2007-08-22 嘉兴市四通车轮制造有限公司 Process of making integral automobile wheel
CN101579728A (en) * 2008-06-10 2009-11-18 万丰奥特控股集团有限公司 Centrifugal casting method and device of magnesium alloy hub
CN101722401A (en) * 2008-10-22 2010-06-09 上海保隆汽车科技股份有限公司 Process for manufacturing magnesium alloy wheel and process for manufacturing wheel rim of magnesium alloy wheel
CN102601338A (en) * 2012-03-21 2012-07-25 重庆大学 Method for producing large magnesium alloy ring by means of centrifugal casting
CN103056611A (en) * 2012-12-20 2013-04-24 河北立中有色金属集团有限公司 Magnesium alloy automobile hub casting spinning compound molding method
CN205184265U (en) * 2015-11-30 2016-04-27 内蒙古华唐伟业再生资源有限公司 System for be used for producing big minibus passenger train aluminum alloy wheel hub

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李建等: "H 形铝合金车轮辗锻工艺研究", 《汽车零部件》 *

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