CN113510450A - Method for manufacturing bevel gear set and bevel gear set thereof - Google Patents
Method for manufacturing bevel gear set and bevel gear set thereof Download PDFInfo
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- CN113510450A CN113510450A CN202110861996.5A CN202110861996A CN113510450A CN 113510450 A CN113510450 A CN 113510450A CN 202110861996 A CN202110861996 A CN 202110861996A CN 113510450 A CN113510450 A CN 113510450A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000011265 semifinished product Substances 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 210000003781 tooth socket Anatomy 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 238000004512 die casting Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a method for manufacturing a bevel gear set, which comprises the following steps: uniformly mixing the alloy powder according to the proportion; step two: feeding the alloy powder into a die, and pressing the alloy powder into a blank piece; step three: sintering the blank into a semi-finished piece; step four: chamfering or drilling the semi-finished product; step five: quenching the semi-finished product which is subjected to chamfering or drilling; step six: deburring the semi-finished product; step seven, reaming the semi-finished product with the burrs removed; the bevel gear set comprises a first bevel gear and a second bevel gear; in the fourth step, when the first bevel gear is produced, chamfering is performed in the fourth step, and when the second bevel gear is produced, drilling is performed in the fourth step; according to the invention, the production of the bevel gear set can be streamlined through the preset die, the production precision and the production efficiency can be controlled by controlling the die precision, and compared with the traditional cutting process, the method has higher precision and better efficiency.
Description
Technical Field
The invention belongs to the technical field of gear production, and particularly relates to a production method for a bevel gear set
Background
The gear is one of necessary parts in mechanical transmission, especially the bevel gear, the application and the use place are wider, the existing production technology of the bevel gear is produced by adopting the traditional processes of cutting, milling, planing and the like, the production mode has lower production efficiency and high production cost, and the gear teeth on the surface of each bevel gear can be produced by cutting for many times in the production efficiency; in terms of production cost, a large amount of waste materials are inevitably cut in the cutting process, and the waste materials are difficult to utilize, so that the cost is inevitably increased.
Disclosure of Invention
The invention aims to provide a method for a bevel gear set with high strength and the bevel gear set.
To achieve the above object, the present invention provides a method of manufacturing a bevel gear set, the method comprising the steps of:
the method comprises the following steps: uniformly mixing the alloy powder according to the proportion;
step two: feeding the alloy powder into a die, and pressing the alloy powder into a blank piece;
step three: sintering the blank into a semi-finished piece;
the blank piece comprises a disc-shaped gear blank and a cylindrical gear blank, a plurality of first teeth are arranged on the disc-shaped blank, third teeth are arranged on the cylindrical gear blank, the first teeth are meshed with the third teeth, and the first teeth and the third teeth are arranged in an arc shape.
According to the invention, the production of the bevel gear set can be realized in a flow manner through the preset die, the precision of the die is controlled, the production efficiency is high, and the production cost is low.
Optionally, one side of the disc-shaped gear blank has a first gear surface, and the other side of the disc-shaped gear blank has a second gear surface, a plurality of the first teeth are arranged on the first gear surface along the circumferential direction of the disc-shaped gear blank, and the plurality of the first teeth form a first gear set; the cylindrical gear blank circumferential wall has a third gear face on which a plurality of the third teeth are arranged along a circumferential direction of the cylindrical gear blank; and a plurality of third gears form a third gear set.
Optionally, the method further comprises the following steps:
step four: chamfering or drilling the semi-finished product;
step five: quenching the semi-finished product which is subjected to chamfering or drilling;
step six: deburring the semi-finished product;
and seventhly, reaming the semi-finished product with the burrs removed.
Optionally, in the first step, the alloy powder for producing the first bevel gear contains, by mass, iron: 91.6-98.4, nickel: 1.0 to 3.0, carbon: 0.6-0.9, copper: 0 to 2.5;
in the first step, the alloy powder for producing the second bevel gear comprises the following components in percentage by mass: 93.15-96.45, carbon: 0.3-0.6, nickel: 1.55-1.95, copper: 1.3-1.7, molybdenum: 0.4 to 0.6
The present invention has been made to achieve the above objects, and provides a bevel gear set, produced by a method of manufacturing a bevel gear set, including a first bevel gear and a second bevel gear;
the first bevel gear is of a disc-shaped structure with a first gear through hole, the first bevel gear is provided with a first gear surface, a first tooth group is arranged on the first gear surface, the first tooth group comprises a plurality of first spiral-arc teeth arranged along the circumferential direction of the first bevel gear, and each first spiral-arc tooth extends from inside to outside along the radial direction of the first bevel gear;
a second bevel gear having a cylindrical structure with a second gear through hole, the circumferential wall of the second bevel gear having a third gear surface, wherein the third gear surface is provided with a third tooth group, the third tooth group includes a plurality of third curved teeth arranged along the circumferential direction of the second bevel gear, and each third curved tooth extends upward from the lower end of the second bevel gear along the axial direction of the second bevel gear; each first arc tooth and each third arc tooth are arranged in an arc shape;
optionally, one side of the first bevel gear has a first gear surface, and the other side of the first bevel gear has a second gear surface, the second gear surface is provided with a second tooth group, the second tooth group comprises a plurality of second arc teeth arranged along the circumferential direction of the first bevel gear, and each second arc tooth extends outwards from the radial direction of the first bevel gear; and each tooth crest of the first tooth group is in one-to-one correspondence with each tooth socket of the second tooth group.
Optionally, the first tooth group is gradually increased in distance from the tooth crest to the tooth trough along the radial direction of the first bevel gear from outside to inside, and the second tooth group is gradually increased in distance from the tooth crest to the tooth trough along the radial direction of the first bevel gear from outside to inside.
Optionally, along the radial direction of the first bevel gear, an upper end surface is formed on the surface of the first gear from the central axis of the first bevel gear to the starting end of the first spiral tooth generation, and the upper end surface is flush with the tooth crest of the first spiral tooth; and a lower end surface is formed on the surface of the second gear from the central axis of the first bevel gear to the starting end generated by the second arc teeth along the radial direction of the first bevel gear, and the lower end surface is flush with the tooth grooves of the second arc teeth.
Optionally, the second bevel gear includes straight section and conic section, from up down, along the axial direction of second bevel gear, the circumference wall that conic section of second bevel gear corresponds gradually to the axis of second bevel gear is drawn close.
To sum up the above
The raw material utilization rate of metal powder pressing is high, the production efficiency is high, and the method is a common manufacturing mode in the existing metal parts; however, the part manufactured by the production process has low strength, and particularly, the part which protrudes outwards and is thin is easy to deform and break after being pressed; therefore, although the metal powder die casting process is applied to the manufacture of gears or other metal parts, the process is not generally used in the manufacture of bevel gear sets. The main factor is limited by the use scene of the bevel gear set, when the bevel gear set is meshed, a particularly large impact force is generated, and mechanical impact is unavoidable through improving the precision of parts, so that the strength requirement on the gear teeth on the bevel gear set is high, and if a metal powder die casting process is adopted, the strength of the gear teeth is inevitably difficult to achieve the expected purpose. In the bevel gear set manufactured by the metal powder die-casting process, the gear teeth on the surface of the bevel gear set are designed into arc shapes, and the structure of the arc-shaped secondary teeth is more suitable for bearing larger pressure compared with straight teeth, so that the gear teeth can be arranged in the arc shapes, the strength of the gear teeth is increased, and the problem of the bevel gear manufactured by the metal powder die-casting process in the strength of the gear teeth is solved;
therefore, when the gear teeth on the bevel gear set are subjected to strong pressure, the problems of deformation, fracture and the like can be avoided; compared with the prior art, the invention innovatively applies the metal powder die-casting process and the gear teeth arranged in an arc shape to the manufacture of the bevel gear, so that the bevel gear set produced by the process has the following advantages;
1. through the preset die, the production of the bevel gear set can be streamlined, the production precision and the production efficiency can be controlled by controlling the die precision, and compared with the traditional cutting process, the method has higher precision and better efficiency.
2. Compared with the existing bevel gear set, the bevel gear set has the advantages that the gear teeth are arranged in the arc shape, so that the tooth strength of the arc-shaped bevel gear set is higher in the working process of the bevel gear set, and the problem that the tooth strength of the bevel gear set is lower due to the fact that a metal powder pressing process is used can be solved
Drawings
Fig. 1 is a perspective view of a first bevel gear produced by the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a bottom view of fig. 1.
Fig. 4 is a cross-sectional view taken at a-a in fig. 2.
Fig. 5 is a top view of fig. 1 and shows specific parameters of the first bevel gear.
Fig. 6 is a sectional view of fig. 1, and shows specific parameters of the first bevel gear.
FIG. 7 is a perspective view of a second bevel gear produced by the present invention.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a cross-sectional view at B-B in fig. 8.
FIG. 10 is a top view of FIG. 7 and shows specific parameters of a second bevel gear.
FIG. 11 is a cross-sectional view of FIG. 7 and shows specific parameters of a second bevel gear.
Fig. 12 is a sectional view of the first bevel gear, and shows a pitch angle, a face angle, and a root angle of the first bevel gear.
FIG. 13 is a cross-sectional view of a first bevel gear and shows the pitch, face and root angles of a second bevel gear.
Fig. 14 is a perspective view of bevel gears in a conventional bevel gear set.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
Referring to fig. 14, the teeth of the bevel gears of the conventional bevel gear set are all arranged in a straight line shape, and the teeth of the bevel gears are arranged in such a shape that the teeth of the gears need to have sufficient strength, otherwise the bevel gear set has a problem of tooth breakage during meshing. Based on the problem, when the bevel gear set is produced, in the traditional production process, the required gear shape can be carved on the metal block only by selecting cutting, planing and other modes, so that the strength of the gear teeth on the bevel gear can be ensured; if a bevel gear set is manufactured by pressing metal powder which is newer than the metal powder, the strength of the gear teeth of the bevel gear set is low due to the inherent defects of the metal powder pressing process; the invention provides the following scheme for the purpose.
Referring to fig. 1-13, a method of manufacturing a bevel gear set includes, as steps,
the method comprises the following steps: uniformly mixing the alloy powder according to the proportion;
step two: feeding the alloy powder into a die, and pressing the alloy powder into a blank piece;
step three: sintering the blank into a semi-finished piece;
step four: chamfering or drilling the semi-finished product;
step five: quenching the semi-finished product which is subjected to chamfering or drilling;
step six: deburring the semi-finished product;
step seven, reaming the semi-finished product with the burrs removed;
the bevel gear set comprises a first bevel gear and a second bevel gear;
in the fourth step, when the first bevel gear is produced, chamfering is performed in the fourth step, and when the second bevel gear is produced, drilling is performed in the fourth step;
in the seventh step, when the first bevel gear is produced, grinding an angle R is needed after hole reaming is finished;
in the first step, the alloy powder for producing the first bevel gear comprises the following components in percentage by mass: 91.6-98.4, nickel: 1.0 to 3.0, carbon: 0.6-0.9, copper: 0 to 2.5;
in the first step, the alloy powder for producing the second bevel gear comprises the following components in percentage by mass: 93.15-96.45, carbon: 0.3-0.6, nickel: 1.55-1.95, copper: 1.3-1.7, molybdenum: 0.4 to 0.6.
In the second step, the blank piece formed by pressing is characterized by comprising a disc-shaped blank piece and a columnar blank piece, wherein one side of the disc-shaped blank piece is provided with a first gear surface, the other side of the disc-shaped blank piece is provided with a second gear surface, the first gear surface is provided with a plurality of first teeth which are arranged along the circumferential direction of the disc-shaped blank piece, the second teeth are arc-shaped, and the first gears form a first gear set; the cylindrical gear blank circumferential wall is provided with a third gear surface, a plurality of third teeth are arranged along the circumferential direction of the second bevel gear, the third teeth are arc-shaped, and a third gear set is formed by the plurality of third gears; the first set of teeth and the third set of teeth are intermeshed.
After the first and second bevel gears are produced, oil immersion treatment is required to prevent corrosion during storage.
The production method provided by the invention is used for producing the bevel gear set, firstly, the production method of the bevel gear set is changed into metal powder pressing, and compared with the traditional processes of cutting, planing and the like, the production method is low in production cost and high in production efficiency. Simultaneously, to the problem that the gear teeth intensity that appears in the metal powder die-casting technology is low, through setting up the blank piece upper teeth into the arc to the intensity of the gear teeth on the bevel gear has been increased, so be used for remedying the gear teeth intensity that uses metal powder pressing technology to be difficult to avoid and hang down the problem.
A bevel gear set comprises a first bevel gear 1 and a second bevel gear 2, wherein a disc-shaped blank is used for producing the first bevel gear and a cylindrical blank is used for producing the second bevel gear.
The first bevel gear 1 has a disk-like structure as a whole having a first gear through hole 10, and a shaft is inserted into the first gear through hole 10.
Referring to fig. 1 to 4, the first bevel gear 1 includes a first gear surface 1a and a second gear surface 1b, wherein the first gear surface 1a is formed at an upper end of the first bevel gear 1, the second gear surface 1b is formed at a lower end of the second bevel gear 1, a first tooth group 11a is provided on the first bevel gear surface 1a, the first tooth group 11a includes a plurality of first curved teeth 111a arranged along a circumferential direction of the first bevel gear 1, each of the first curved teeth 111a extends outward along a radial direction of the first bevel gear 1, and the first curved teeth 111a are arc-shaped.
The second gear surface 1b is formed at the lower end of the first bevel gear 1, a second tooth group 11b is arranged on the second gear surface 1b, the second tooth group 11b includes a plurality of second curved teeth 111b arranged along the circumferential direction of the first gear 1, each second curved tooth 111b extends outwards along the radial direction of the first bevel gear 1, and the second curved teeth 111b are arc-shaped.
In order to increase the thickness of the first bevel gear, the tooth spaces of the first tooth group 11a and the tooth spaces of the second tooth group 11b may be offset from each other, that is, the tooth spaces of the first tooth group 11a and the tooth spaces of the second tooth group 11b correspond to each other, so that the thicknesses corresponding to the first tooth group 11a and the second tooth group 11b may be prevented from being excessively low, and the thicknesses of the tooth spaces of the first tooth group 11a and the tooth spaces of the second tooth group 11b may be thicknesses between the tooth spaces of the curved teeth and the tooth spaces of the first tooth group 11a and the tooth spaces of the second tooth group 11 b. Specifically, each tooth crest of the first tooth group 11a corresponds to each tooth groove of the second tooth group 11 b.
The first tooth group 11a is gradually increased in distance from the tooth crest to the tooth trough along the radial direction of the first bevel gear from outside to inside, and the second tooth group 11b is gradually increased in distance from the tooth crest to the tooth trough along the radial direction of the first bevel gear 1 from outside to inside, so that it is not difficult to find that the thicknesses of the first arc tooth 111a of the first tooth group 11a and the second arc tooth 111b of the second tooth group 11b are gradually increased, so that the first tooth group 11a and the second tooth group 11b of the first bevel gear 2 are inclined at a certain angle.
Further, the first tooth group 11a does not completely occupy the entire first gear surface 1a, so that an upper end surface 12a is formed at the upper end of the first bevel gear, specifically, along the radial direction of the first bevel gear, from the central axis of the first bevel gear to the start end of the first spiral tooth generation, and the upper end surface 12a and the tooth tips of the first tooth group 11a are flush with each other. Wherein the first gear through hole 10 is disposed on the upper end surface 12a, and in order to increase the connection strength of the first bevel gear 1 with the shaft, a protrusion 10a is further disposed on the upper end surface 12a, wherein the first gear through hole 10 is disposed on the protrusion 10a and penetrates through the protrusion 10a, and the protrusion 10a is provided with a first annular groove 101 a.
Further, the second tooth group 11b does not completely occupy the second bevel gear surface 1b, and a lower end surface 12b is formed at the lower end of the first bevel gear, specifically, the lower end surface 12b is formed from the central axis of the first bevel gear to the start end of the second spiral tooth 111b, and the lower end surface 12b and the tooth space surface of the second tooth group 11b are flush with each other, so that the lower end surface 12b is a plane sinking up and down of the second bevel gear surface 1b relative to the tooth crest of the second tooth group 11 b. The first gear through hole 10 penetrates the boss 10a and then penetrates the lower end surface 12 b. And the lower end surface 12b is further provided with a plurality of holes 120b, the holes 120b do not penetrate through the first bevel gear, and the holes 120b are at least two holes 120b, in this embodiment, there are three holes, the arrangement of the holes 120b is formed by taking the center of circle of the first gear through hole 10 as the center of circle and forming a circumferential array on the lower end surface 12b, that is, the distance from the center of circle of each hole 120b to the center of circle of the first gear through hole 10 is equal, so that the center of circle of each hole 120b is arranged on a circle, and the arc lengths of the centers of two adjacent holes 120b corresponding to the center of circle are equal. The hole 120 may reduce the weight of the gear and may be used to scram the first bevel gear when the first bevel gear is in use.
Referring to fig. 5 to 6, the parameters of the first bevel gear 1 will be described below, the diameter of the projection 10a is 22mm, and the diameter of the lower end surface 12b is 36 mm; the diameter of the first bevel gear is 46 mm; the vertical distance from the top end of the protrusion 10a to the upper end surface 12a is 7.5 mm; the height of the first bevel gear is 14.3-15.3 mm; the vertical distance from the top end of the projection 10a to the lower end face 12b is 12.3.
The diameter of the hole 120 is 7.3mm, and the diameter of a circle on which the hole 120 is arranged is 24.9-25.01 mm; the inner diameter of the first gear through hole 10 is 11.84 mm.
Referring to fig. 7 to 9, the second bevel gear 2 is a cylindrical structure having a second gear through hole 20, a third gear surface 21 is provided on a circumferential wall of the second bevel gear 2, a third gear 211 is provided on the third gear surface 21, the third tooth group 211 includes a plurality of third curved teeth 210 arranged along a circumferential direction of the second bevel gear 2, and each third curved tooth 210 extends upward from a lower end of the second bevel gear along an axial direction of the second bevel gear 2, and the third curved teeth are arranged in an arc shape.
Specifically, the circumferential wall of the second bevel gear 2 is divided into a straight section 201 and a tapered section 202, wherein the circumferential wall corresponding to the straight section 201 is enclosed to form a cylindrical structure, and the circumferential wall corresponding to the tapered section 202 is enclosed to form a tapered structure. Along the central axis of the second bevel gear, the corresponding circumferential wall of the conical section 202 of the second bevel gear gradually draws close to the axis of the second bevel gear from the straight section 201 to the conical section 202, and a certain twist is generated at the part of each third curved tooth arranged on the conical section 202. A second annular groove 212 is arranged on the third tooth group 211 corresponding to the straight section 201.
With reference to fig. 10-11, the parameters of the second bevel gear 2 are described below; the height of the second bevel gear 2 is 13.5mm, and the inner diameter of the through hole of the second bevel gear is 6.5 mm. The diameter of the top end of the conical end 201 is 9.87mm, and the diameter of the straight section is 14 mm.
It will be appreciated that the disk-shaped blank corresponds to the first bevel gear, and thus the first gear face corresponds to the first gear surface 1a, the first set of gears corresponds to the first set of teeth 11a, and the first tooth corresponds to the first curved tooth 111 a. In the method for manufacturing a bevel gear set disclosed in the present invention, the method for manufacturing a bevel gear set is the same as the method for manufacturing a first gear surface and the structure on the first gear surface, and the description of the method is omitted.
The teeth of the first bevel gear 1 and the second bevel gear 2 described above are both arc teeth, that is, curved bevel gears, which have the advantages of high contact ratio, strong bearing capacity, stable transmission and low noise, but the production difficulty is high, the conventional mode is to produce by cutting, milling, planing and other processing technologies, the processing mode has low production efficiency, poor production precision, poor quality of mass-produced products, and the quality control is difficult to promote.
The first bevel gear produced by the present invention has the tooth tops and tooth spaces of the first tooth group and the second tooth group corresponding to each other, so that the density of the pressed metal powder can be higher at the portions where the first curved teeth and the second curved teeth correspond to each other, thereby enhancing the strength of the first curved teeth and the second curved teeth.
Referring to fig. 12-13, the first bevel gear has a pitch cone angle of 73 °, a face cone angle of 76.3 °, and a root cone angle of 67.95 °; the pitch cone angle of the second bevel gear is 16.99 degrees, the face cone angle is 22.41 degrees and the root cone angle is 13.7 degrees.
It is to be understood that the described embodiments are merely a few embodiments of the invention and not all 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.
Claims (10)
1. A method of manufacturing a bevel gear set, characterized in that the method comprises the steps of:
the method comprises the following steps: uniformly mixing the alloy powder according to the proportion;
step two: feeding the alloy powder into a die, and pressing the alloy powder into a blank piece;
step three: sintering the blank into a semi-finished piece;
the blank piece comprises a disc-shaped gear blank and a cylindrical gear blank, a plurality of first teeth are arranged on the disc-shaped blank, third teeth are arranged on the cylindrical gear blank, the first teeth are meshed with the third teeth, and the first teeth and the third teeth are arranged in an arc shape.
2. A method of manufacturing a bevel gear set according to claim 1, wherein said disc-shaped gear blank has a first gear face on one side and a second gear face on the other side, a plurality of said first teeth being arranged on said first gear face in a circumferential direction of said disc-shaped gear blank, a plurality of said first gears constituting a first gear set; the cylindrical gear blank circumferential wall has a third gear face on which a plurality of the third teeth are arranged along a circumferential direction of the cylindrical gear blank; and a plurality of third gears form a third gear set.
3. The method of manufacturing a bevel gear set according to claim 1, further comprising the steps of:
step four: chamfering or drilling the semi-finished product;
step five: quenching the semi-finished product which is subjected to chamfering or drilling;
step six: deburring the semi-finished product;
and seventhly, reaming the semi-finished product with the burrs removed.
4. The method of manufacturing a bevel gear set according to claim 1, wherein in the first step, the alloy powder for producing the first bevel gear contains, in mass fraction, iron: 91.6-98.4, nickel: 1.0 to 3.0, carbon: 0.6-0.9, copper: 0 to 2.5;
in the first step, the alloy powder for producing the second bevel gear comprises the following components in percentage by mass: 93.15-96.45, carbon: 0.3-0.6, nickel: 1.55-1.95, copper: 1.3-1.7, molybdenum: 0.4 to 0.6.
5. A bevel gear set produced by a method of manufacturing a bevel gear set according to any one of claims 1 to 4, comprising a first bevel gear and a second bevel gear;
the first bevel gear is of a disc-shaped structure with a first gear through hole, the first bevel gear is provided with a first gear surface, a first tooth group is arranged on the first gear surface, the first tooth group comprises a plurality of first spiral-arc teeth arranged along the circumferential direction of the first bevel gear, and each first spiral-arc tooth extends from inside to outside along the radial direction of the first bevel gear;
a second bevel gear having a cylindrical structure with a second gear through hole, the circumferential wall of the second bevel gear having a third gear surface, wherein the third gear surface is provided with a third tooth group, the third tooth group includes a plurality of third curved teeth arranged along the circumferential direction of the second bevel gear, and each third curved tooth extends upward from the lower end of the second bevel gear along the axial direction of the second bevel gear; each first arc tooth and each third arc tooth are arranged in an arc shape.
6. The bevel gear set according to claim 5 wherein said first bevel gear has a first gear surface on one side and a second gear surface on another side, said second gear surface being provided with a second set of teeth comprising a plurality of second spiral teeth arranged in a circumferential direction of said first bevel gear, and each of said second spiral teeth extending outwardly from a radial direction along said first bevel gear; and each tooth crest of the first tooth group is in one-to-one correspondence with each tooth socket of the second tooth group.
7. The bevel gear set according to claim 6, wherein the first tooth set has a distance from the tooth crest to the tooth trough that gradually increases from outside to inside along the radial direction of the first bevel gear, and the second tooth set has a distance from the tooth crest to the tooth trough that gradually increases from outside to inside along the radial direction of the first bevel gear.
8. The bevel gear set according to claim 6, wherein an upper end surface is formed on the first gear surface along a radial direction of the first bevel gear from a central axis of the first bevel gear to a start end of the first spiral tooth generation, the upper end surface being flush with a crest of the first spiral tooth; and a lower end surface is formed on the surface of the second gear from the central axis of the first bevel gear to the starting end generated by the second arc teeth along the radial direction of the first bevel gear, and the lower end surface is flush with the tooth grooves of the second arc teeth.
9. The bevel gear set according to claim 5, wherein the second bevel gear comprises a straight section and a conical section, and the circumferential wall corresponding to the conical section of the second bevel gear gradually gets closer to the central axis of the second bevel gear along the axial direction of the second bevel gear from bottom to top.
10. The bevel gear set of claim 9 wherein said third set of teeth corresponding to said straight section has a second ring groove formed therein.
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