CN107252829B - Precise near-net forming process and device for bevel gear shaft - Google Patents
Precise near-net forming process and device for bevel gear shaft Download PDFInfo
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- CN107252829B CN107252829B CN201710693779.3A CN201710693779A CN107252829B CN 107252829 B CN107252829 B CN 107252829B CN 201710693779 A CN201710693779 A CN 201710693779A CN 107252829 B CN107252829 B CN 107252829B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 22
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 20
- 238000003754 machining Methods 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 230000001050 lubricating effect Effects 0.000 claims abstract description 8
- 238000005461 lubrication Methods 0.000 claims abstract description 7
- 238000000137 annealing Methods 0.000 claims abstract description 6
- 239000010705 motor oil Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
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- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005242 forging Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000010913 used oil Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/14—Making other products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to a precise near-net forming process and a device for a bevel gear shaft. The process comprises the following steps: a. precisely sawing and blanking the bar stock; b. annealing treatment; c. lubricating the blank by adopting a macromolecular lubricant; d. cold heading preformed cone blank: a room temperature cold heading method is adopted to preliminarily perform a blank according to the tooth taper angle of the bevel gear shaft and the shape of the shaft step, and a foundation is laid for the next step of near-net forming of the bevel gear and the step shaft; e. lubrication by using molybdenum disulfide: uniformly stirring molybdenum disulfide powder and engine oil according to the weight percentage of 30-40% to 60-70%, then coating the prepared molybdenum disulfide on the surface of a preformed cone blank, and directly placing the preformed cone blank into a near-net forming die for forming; f. precision near-net shaping: forming a bevel gear shaft on a precise near-net forming device; g. machining according to the requirement; h. and (5) finishing. The forming device comprises a set of combined bevel gear die, a set of combined step shaft die, a reinforcing plate and an ejection limiting block.
Description
Technical Field
The invention relates to a bevel gear (bevel gear) shaft and metal material control forming technology, belonging to the field of mechanical equipment manufacturing. In particular to a precise near-net forming process and a device for bevel gear (bevel gear) shafts, which are suitable for precise near-net forming of bevel gear shaft parts of automobiles, tractors, motorcycles, aviation, ships, tanks and the like in large batch.
Background
At present, bevel gear shaft parts are generally machined by cutting or hot die forging by using a milling machine. The machining has the problems of short service life of a cutter, high cost, poor size uniformity of products, low production efficiency, low material utilization rate and the like. The hot die forging requires refinishing due to poor surface roughness of the bevel gear and the shaft, and has multiple processes and high energy consumption. With the rapid development and high performance requirements of the steam-supported industry and military equipment such as helicopters, ships, tanks and the like, the traditional milling machine mechanical chip processing and hot die forging method cannot meet the market demands of increasing mass and high quality.
Disclosure of Invention
The invention aims to provide a process and a device for precise near-net forming of a bevel gear shaft aiming at the defects in the prior art.
The purpose of the invention is realized by the following technical scheme:
the precise near-net forming process of the bevel gear shaft comprises the following steps of:
a. precisely sawing and blanking bars;
b. annealing treatment;
c. lubricating the blank by using an FM-4 water-based polymer lubricant;
d. cold heading preformed cone blank: a room temperature cold heading method is adopted to preliminarily perform blanks according to the tooth taper angle of the bevel gear shaft and the shape of the shaft step, and a foundation is laid for the next step of near-net forming of the bevel gear and the step shaft;
e. lubrication by using molybdenum disulfide: uniformly stirring molybdenum disulfide powder and engine oil according to the weight percentage of 30-40% to 60-70%, then coating the prepared molybdenum disulfide on the surface of a preformed cone blank, and directly placing the preformed cone blank into a near-net forming die for forming;
f. precision near-net shaping: forming a bevel gear shaft on a precise near-net forming device;
g. machining according to the requirement;
h. and (5) finishing.
The precise near-net forming device comprises an upper combined bevel gear die, a lower combined step shaft die, a reinforced base plate and an ejection limiting block which are sequentially arranged from top to bottom; the upper combined bevel gear die comprises a bevel gear core die, a core die fastening sleeve and a core die reinforced reinforcing sleeve which are sequentially sleeved together from inside to outside; the lower combined step shaft die is formed by combining a step shaft die, a step shaft die sleeve and a step shaft die fixing ring which are sequentially sleeved together in an interference fit manner from inside to outside; the reinforced base plate consists of an inner reinforced plate and an outer plate which are sleeved together in an interference fit manner; the ejection limiting block is composed of an ejection rod and a limiting block which are sleeved together from inside to outside, and the upper end of the ejection rod vertically extends upwards to the die cavity of the step shaft die through the central through hole of the inner reinforcing plate.
The upper part of the bevel gear core mold is reserved with the ventilating and shunting holes which can ensure that the bevel gear is full of tooth form and facilitate shunting of redundant metal, and can effectively improve the stress distribution condition of the mold, so that the service life of the bevel mold can be greatly prolonged; the diameter of the ventilation diversion hole can be neither large nor small, so that metal is large and easy to flow into the hole, and the bevel gear is not full; too small will increase the deformation resistance of the metal and cause cracking of the mold. The diameter D = 0.15-0.2D (bevel gear large end diameter) of the tap hole is empirically considered to be suitable.
In the apparatus of the present invention, the reinforcing mat composed of the inner reinforcing plate and the outer plate is distinguished from the conventional mat. The conventional backing plate is generally made of common alloy steel integrally, and the hardness and the strength of the heat treatment are not high, while the split combined type reinforced backing plate adopted by the invention can be made of die steel or alloy steel, and the hardness and the strength of the split combined type reinforced backing plate can be better than those of the conventional backing plate. Not only is difficult to deform, collapse and crack, but also can effectively protect the damage of the step shaft die, and in addition, the inner reinforcing plate can be replaced according to the requirement so as to be used interchangeably in multiple occasions, thereby reducing the number of the backing plates and saving die materials.
The cold-heading preformed cone blank in the invention is different from a hot-die forging preformed blank. The hot die forging is mostly performed by machining, turning and blanking. The burrs of the blank need special treatment, and a large amount of lathes, knives, measuring tools, manpower and the like are needed. Hot forging also employs a hot forged preform but the surface scale must be removed. The process adopts a room temperature cold heading method, and performs blanks preliminarily according to the tooth taper angle of the bevel gear shaft and the shape of the shaft step, thereby laying a foundation for next near-net forming of the bevel gear and the step shaft.
The molybdenum disulfide lubrication in the invention refers to that molybdenum disulfide powder and engine oil are uniformly stirred according to a certain proportion and placed in a small container, an oil press operator manually sticks molybdenum disulfide on the surface of a preformed cone blank and directly places the preformed cone blank into a near-net forming die for forming, large-scale heating, rust removal and lubrication processes are not needed, but the purposes of reducing friction resistance and improving the surface finish of a workpiece are achieved. Because the polymer lubricant in the previous lubricating process is still adhered to the surface of the cone blank, the molybdenum disulfide lubricating process is secondary supplement of the lubricant, so that the complicated conventional lubrication is omitted, and the lubricating oil is convenient to operate, energy-saving, pollution-free and good in effect.
The finished product is a bevel gear shaft part.
More specifically, the forming process of the invention comprises the following steps: precisely sawing a bar by using a high-speed band saw, then performing softening annealing treatment, removing oxide skin on the surface of the bar by using shot blasting, cleaning, derusting and heating, lubricating a blank by using a high-molecular lubricant, and then performing cold heading on the preformed cone blank. And (3) after molybdenum disulfide is supplemented and lubricated, putting the preformed cone blank into a bevel gear shaft precision near-net forming device to form a bevel gear shaft. When the bevel gear shaft workpiece is formed, the die is assembled, and the bevel gear die and the step shaft die are carefully and cautiously adjusted and centered to ensure the size precision of the bevel gear shaft.
The upper combined bevel gear die can be used by being directly installed in a universal upper die frame of an oil press, is convenient and easy to operate, and is economical and practical. When the ejection limiting block, the reinforcing base plate and the lower combined step shaft die are applied, the ejection limiting block, the reinforcing base plate and the lower combined step shaft die are sequentially placed in a universal lower die frame of an oil press from bottom to top, and the bevel gear shaft can be precisely formed in a near-net mode by adjusting the centering of the upper die and the lower die according to needs.
The operation procedure of the forming apparatus of the present invention is as follows: the bevel gear core mold is in interference fit with the core mold fastening sleeve, then is in interference press fit with the core mold reinforcing sleeve, and then the upper combined bevel gear mold is installed in a universal upper mold frame of an oil press. And (3) performing interference fit on the step shaft die and the step shaft die sleeve, and then performing interference fit on the step shaft die and the step shaft die fixing ring. And pressing the inner reinforced plate and the outer plate together in an interference manner to form the reinforced plate. When the combined step shaft die is applied, the limiting block and the ejector rod are firstly placed in a universal lower die frame of a used oil press, then a reinforcing plate formed by an inner reinforcing plate and an outer plate is placed in the die frame, then the combined step shaft die is placed, and the upper die and the lower die are adjusted to be centered according to requirements. And (3) placing the cold-heading preformed cone blank into the lower combined step shaft die, and forcing the metal to flow and extrude to form the bevel gear shaft along with the descending of the press. When the cold extrusion precision forming bevel gear shaft reaches the set requirement, the press stops descending and returning, the upper part of the bevel gear shaft workpiece is separated from the bevel gear core mold, and the lower part of the bevel gear shaft workpiece is ejected out through the ejector rod 10. The bevel gear shaft parts can be produced in large batch by the circulation reciprocating.
The invention has the following beneficial effects:
1. the bevel gear shaft formed by the precision near-net forming process and the equipment has continuous metal fiber streamline, avoids the defects of knife mark, microcrack, poor finish degree and the like formed at the tooth root during the machining of mechanical cutting, and has more compact material organization, so parts have wear resistance, high strength and greatly prolonged service life.
2. The bevel gear shaft formed by the precision near-net forming process and the equipment can greatly shorten the processing time, the production efficiency is about 15 to 20 times of that of machining, a large amount of tools, clamps and equipment, manpower and energy sources required by machining can be saved, the utilization rate of materials is greatly improved, the size identity of parts is good, the quality is high, and the bevel gear shaft has remarkable economic and social benefits and is very suitable for mass production and application.
3. The process and the device are suitable for the precise near-net forming of the bevel gear shaft. The forming device has the advantages of simple and novel structure, easy processing and manufacturing, convenient use and operation, long service life of the die and suitability for mass production and application. The upper part of the bevel gear core mold is provided with the air-permeable shunting hole, so that the bevel gear can be fully filled with tooth shapes, the surplus metal shunting is facilitated, and meanwhile, the stress distribution condition of the mold can be effectively improved, so that the service life of the bevel mold can be greatly prolonged. The reinforced base plate is different from the conventional base plate, the hardness and the strength of the reinforced base plate are superior to those of the conventional base plate, the reinforced base plate is not easy to crush and deform, meanwhile, the damage of a step shaft die can be effectively prevented, in addition, the inner reinforced plate can be replaced according to the requirement so as to be used interchangeably in multiple occasions, therefore, the number of the base plates can be reduced, expensive die materials are saved, and the economic benefit is remarkable.
4. In the precise near-net forming process of the bevel gear shaft, molybdenum disulfide is adopted to supplement and lubricate a preformed blank, so that the friction force can be effectively reduced, and the surface finish of the bevel gear shaft is improved. The molybdenum disulfide is lubricated, pollution-free, non-toxic, energy-saving and simple to operate.
5. The forming device has simple and innovative structure, is easy to process and manufacture, greatly saves expensive die materials, and has remarkable economic benefit. Meanwhile, the use and operation are convenient, the service life of the die is long, the replacement is easy, and the die is suitable for mass production and application.
6. The precision near-net forming process adopted by the invention has reasonable determined process parameters, and the surface smoothness, precision, size and the like of the bevel gear shaft part formed by the precision near-net forming process can meet the design requirements of the part and can be used without machining.
Drawings
Fig. 1 is a schematic structural view of a precision net-forming apparatus for a bevel gear shaft according to the present invention.
Number in the figure: the bevel gear core mold comprises a bevel gear core mold 1, a core mold fastening sleeve 2, a bevel gear shaft workpiece 3, a core mold reinforcing sleeve 4, a step shaft mold 5, a step shaft mold sleeve 6, a step shaft mold fixing ring 7, an inner reinforcing plate 8, an outer plate 9, an ejector rod 10 and a limiting block 11.
Detailed Description
The invention will be further described with reference to the following examples (drawings):
the purpose of the invention is realized by the following technical scheme:
the precise near-net forming process of the bevel gear shaft comprises the following steps of:
a. precisely sawing and blanking bars;
b. annealing treatment;
c. lubricating the blank by using a high FM-4 molecular lubricant;
d. cold heading preformed cone blank: a room temperature cold heading method is adopted to preliminarily perform blanks according to the tooth taper angle of the bevel gear shaft and the shape of the shaft step, and a foundation is laid for the next step of near-net forming of the bevel gear and the step shaft;
e. lubrication by using molybdenum disulfide: uniformly stirring molybdenum disulfide powder and engine oil according to the weight percentage of 30-40% to 60-70%, then coating the prepared molybdenum disulfide on the surface of a preformed cone blank, and directly placing the preformed cone blank into a near-net forming die for forming;
f. precision near-net forming: forming a bevel gear shaft on a precise near-net forming device;
g. machining according to the requirement;
h. and (5) finishing.
Further, the invention adopts a high-speed band saw to precisely saw and cut the bar stock, then carries out softening annealing treatment to remove oxide skin on the surface of the blank, adopts a macromolecular lubricant to lubricate the blank, and then carries out cold heading on the preformed cone blank. And lubricating the preformed cone blank by molybdenum disulfide, and then placing the preformed cone blank on a bevel gear shaft precision near-net forming device to form a bevel gear shaft. When the bevel gear shaft workpiece is formed, the die is assembled, and the bevel gear die and the step shaft die are carefully and cautiously adjusted and centered, so that the size precision of the bevel gear shaft is ensured.
The forming apparatus of the present invention is further described in connection with FIG. 1:
the precise near-net forming device comprises an upper combined bevel gear die, a lower combined step shaft die, a reinforced base plate and an ejection limiting block which are sequentially arranged from top to bottom; the upper combined bevel tooth die comprises a bevel gear core die (1), a core die fastening sleeve (2) and a core die reinforcing sleeve (4) which are sequentially sleeved together from inside to outside; the lower combined step shaft die is formed by combining a step shaft die (5), a step shaft die sleeve (6) and a step shaft die fixing ring (7) which are sequentially sleeved together in an interference fit manner from inside to outside; the reinforced base plate consists of an inner reinforced plate (8) and an outer plate (9) which are sleeved together in an interference fit manner; the ejection limiting block is composed of an ejection rod (10) and a limiting block (11) which are sleeved together from inside to outside, and the upper end of the ejection rod (10) vertically and upwards extends into a die cavity of the step shaft die (5) through a central through hole of the inner reinforcing plate (8).
The upper part of the bevel gear core mold (1) is reserved with a ventilating and shunting hole which can ensure that the bevel gear is full of tooth form and is beneficial to shunting of redundant metal, and can effectively improve the stress distribution condition of the mold, so that the service life of the bevel mold can be greatly prolonged; the diameter of the ventilation diversion hole can be neither large nor small, so that metal is large and easy to flow into the hole, and the bevel gear is not full; too little will increase the resistance to deformation of the metal, resulting in die cracking. The diameter D = 0.15-0.2D (bevel gear large end diameter) of the tap hole is empirically considered to be suitable.
In the device of the invention, the reinforcing mat consisting of an inner reinforcing plate (8) and an outer plate (9) is distinguished from conventional mats. The conventional backing plate is generally integrally made of common alloy steel, and the hardness and the strength of the heat treatment are not high, while the split combined type reinforced backing plate adopted by the invention can be made of die steel or alloy steel, and the hardness and the strength of the split combined type reinforced backing plate can be better than those of the conventional backing plate. Not only is difficult to deform, collapse and crack, but also can effectively protect the damage of the step shaft die, and in addition, the inner reinforcing plate can be replaced according to the requirement so as to be used interchangeably in multiple occasions, thereby reducing the number of the backing plates and saving die materials.
The specific assembly mode of the device of the invention is as follows: firstly, a bevel gear core mold (1) is in interference fit with a core mold fastening sleeve (2), then is in press fit with a core mold reinforcing sleeve (4), and then the upper combined bevel gear mold is installed in a universal upper mold frame of an oil press; the step shaft die (5) is in interference fit with the step shaft die sleeve (6), and then is in interference press fit with the step shaft die fixing ring (7); the inner reinforced plate (8) and the outer plate (9) are pressed together in an interference fit manner to form the reinforced plate. When the combined step shaft die is used, the limiting block (11) and the ejector rod (10) are placed into a universal lower die frame of a used oil press, then the reinforcing plate is placed into the die frame, the combined step shaft die is placed, the upper die and the lower die are adjusted to be centered according to needs, and finally the upper die and the lower die are fixed.
And (3) placing the cone blank preformed by cold heading into a lower combined step shaft die, and forcing metal to flow and extrude to form the cone gear shaft along with the descending of an oil press. When the cold extruded bevel gear shaft workpiece meets the design requirement, the press stops descending and returning, the upper part of the bevel gear shaft workpiece is separated from the bevel gear core mold, and the lower part of the bevel gear shaft workpiece ejects the workpiece through the ejector rod 10. The bevel gear shaft parts can be produced in large batch by the circulation reciprocating.
The precision near-net-shape bevel gear shaft part is used by using the device of the invention to net-shape the bevel gear surface and the shaft step part of the bevel gear shaft without machining, or slightly machining the shaft step part. Therefore, when the bevel gear shaft forming device is applied, the bevel gear core mold and the step shaft mold are carefully adjusted to be vertically centered, so that the precision of the formed bevel gear shaft workpiece is ensured to meet the design requirement.
Claims (1)
1. A precise near-net forming process of a bevel gear shaft is characterized by comprising the following steps: the process comprises the following steps:
a. precisely sawing and blanking the bar stock;
b. annealing treatment;
c. lubricating the blank by using an FM-4 water-based polymer lubricant;
d. cold heading preformed cone blank: a room temperature cold heading method is adopted to preliminarily perform blanks according to the tooth taper angle of the bevel gear shaft and the shape of the shaft step, and a foundation is laid for the next step of near-net forming of the bevel gear and the step shaft;
e. lubrication by using molybdenum disulfide: uniformly stirring molybdenum disulfide powder and engine oil according to the weight percentage of 30-40% to 60-70%, then coating the prepared molybdenum disulfide on the surface of a preformed cone blank, and directly placing the preformed cone blank into a near-net forming die for forming;
f. precision near-net forming: forming a bevel gear shaft on a precise near-net forming device;
g. machining according to the requirement;
h. obtaining a finished product;
i. the device adopted by the process comprises an upper combined bevel gear die, a lower combined step shaft die, a reinforced base plate and an ejection limiting block which are sequentially arranged from top to bottom; the upper combined bevel tooth die comprises a bevel gear core die (1), a core die fastening sleeve (2) and a core die reinforcing sleeve (4) which are sequentially sleeved together from inside to outside; the lower combined step shaft die is formed by combining a step shaft die (5), a step shaft die sleeve (6) and a step shaft die fixing ring (7) which are sequentially sleeved together in an interference fit manner from inside to outside; the reinforced base plate consists of an inner reinforced plate (8) and an outer plate (9) which are sleeved together in an interference fit manner; the ejection limiting block is composed of an ejection rod (10) and a limiting block (11) which are sleeved together from inside to outside, and the upper end of the ejection rod (10) vertically and upwards extends into a die cavity of the step shaft die (5) through a central through hole of the inner reinforcing plate (8); and the upper part of the bevel gear core mold (1) is reserved with a ventilation and flow distribution hole which can ensure that the bevel gear is full of tooth form, is beneficial to flow distribution of redundant metal and can effectively improve the stress distribution condition of the mold.
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| CN201710693779.3A CN107252829B (en) | 2017-08-14 | 2017-08-14 | Precise near-net forming process and device for bevel gear shaft |
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| CN201710693779.3A CN107252829B (en) | 2017-08-14 | 2017-08-14 | Precise near-net forming process and device for bevel gear shaft |
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| CN107252829B true CN107252829B (en) | 2023-03-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109550802A (en) * | 2018-12-14 | 2019-04-02 | 江西福格新能源传动技术有限公司 | A kind of differential gear axial direction shunting cold-extrusion shaping apparatus and method |
| CN109483187A (en) * | 2019-01-03 | 2019-03-19 | 盐城金刚星精密锻造有限公司 | A kind of big specification spiral bevel gear near-net-shape technique |
| CN110982599B (en) * | 2019-12-17 | 2022-06-24 | 南京工程学院 | Near-net-shape forming lubricant and preparation method thereof |
| CN111546020A (en) * | 2020-05-27 | 2020-08-18 | 苏州联咏成精密机械有限公司 | Shunting cold extrusion high-precision forming method for automobile spiral bevel gear |
| CN113478188B (en) * | 2021-07-28 | 2022-07-29 | 重庆创精温锻成型有限公司 | Parking gear tooth profile lateral extrusion forming method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1993023186A1 (en) * | 1992-05-21 | 1993-11-25 | Nichidai Corporation | Method of manufacturing shaft of bevel gear |
| CN101712062A (en) * | 2009-11-05 | 2010-05-26 | 郑州机械研究所 | Plastic precise forming process and device of internal bevel gear or spiral involute internal spline |
| CN203526435U (en) * | 2013-09-27 | 2014-04-09 | 江苏太平洋精锻科技股份有限公司 | Bevel gear shaft forging die |
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2017
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