CN102003522A - Manufacturing method for planetary support of electric power tool gear box - Google Patents
Manufacturing method for planetary support of electric power tool gear box Download PDFInfo
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- CN102003522A CN102003522A CN 201010534728 CN201010534728A CN102003522A CN 102003522 A CN102003522 A CN 102003522A CN 201010534728 CN201010534728 CN 201010534728 CN 201010534728 A CN201010534728 A CN 201010534728A CN 102003522 A CN102003522 A CN 102003522A
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- lower cover
- loam cake
- electric tool
- tool gear
- planet stent
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Abstract
The invention discloses a manufacturing method for a planetary support of an electric power tool gear box. The method comprises the following steps: respectively extruding to form an upper cover with a flange and a lower cover with a support section; respectively presintering the upper cover and the lower cover; then primarily jointing the upper cover and the lower cover by a locating pin; integrally welding through sintering; carrying out heat treatment and then releasing the locating pin; and using a specific jig to press a planetary gear and a functional pin. In the invention, the planetary support of the electric power tool gear box is decomposed into two independent powder metallurgy parts, and after being subject to extrusion forming, the two metallurgy parts are subject to welding assembly. As extrusion forming is carried out respectively, the density of each support leg part is up to 6.9-7.0g/cm<3>, the anti-torsion of products can be improved, and crackles on the root part of each support leg are avoided. Two major parts are respectively manufactured, thereby being more convenient for ensuring the accuracy of the products. In the invention, products with complex structures can be processed featuring low cost, high accuracy and high efficiency.
Description
Technical field
The present invention relates to a kind of processing technique of component of machine, be specifically related to a kind of preparation method of electric tool gear-box planet stent.
Background technique
Traditional means of a powder metallurgy technique is because manufacturing procedure complexity, difficulty of processing are big, the assembly low precision, stock utilization is low, price is high, can't manufacturing structure unusual complicated parts.Electric tool gear-box planet stent is the critical component that gear-box is produced, it is made up of upper and lower two disc type parts, in order between two disks, to arrange planet wheel, distribution between two disks two supporting legs, adopted the forging machinery processing technique of traditional complexity in the past, caused that production technology is numerous and diverse, processing cost is high.
Summary of the invention
Goal of the invention: at the deficiencies in the prior art, the purpose of this invention is to provide a kind of preparation method of electric tool gear-box planet stent, to realize being easy to production operation, be beneficial to saving cost, product precision height, increase work efficiency.
Technological scheme: in order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
A kind of method for preparing electric tool gear-box planet stent, be crushed to a flanged (FLGD) loam cake and a lower cover that has supporting section respectively, with loam cake and lower cover presintering respectively, be press-fitted locating stud, then, supporting leg sintering with loam cake and lower cover is welded into one again, under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated again, return locating stud afterwards, compress function pin and planetary pinion at last.
Described loam cake and lower cover all adopt each component powders metallurgy of following parts by weight to make: 0～1.0%C, 1.0～5.0%Ni, 0.2～2.0%Mo, residue are Fe.This formula materials suppression performance is good, and sintered dimensions is stable, intensity height, characteristics such as wear-resistant.
Described loam cake and lower cover be presintering in 700～1200 ℃ common mesh-belt furnace all.In the reducing gas shielding gas atmosphere, carry out once sinteredly, make product have certain intensity, avoid producing the characteristics such as damage, crackle that collapse.
The described locating stud that is press-fitted is for being placed in the tool punching press on the aerostatic press of 3T with loam cake and lower cover and locating stud.Upper and lower covers tentatively is bonded together, can plays positioning action during the sintering weldering.
In order to make two welding between parts more firm, when flanged (FLGD) loam cake is made in extruding, end face at loam cake is provided with several circular holes, after loam cake and lower cover have been press-fitted locating stud, naturally form groove at loam cake and lower cover engaging portion, when freezing, in this groove, place scolder, under the locating stud assist location, loam cake, lower cover freezed to be integral.
Described scolder comprises each component of following parts by weight: 30～45%Ni, 30～45%Cu, 10～25%Mn.Special solder formulations fusing point is low, generally at 500～1200 ℃, at first melts in the double sintering process, melts by the capillarity of matrix part to be seeped in the matrix part, when cooling the matrix part is welded together.
The described locating stud of returning is: the product after Overheating Treatment again of sintering postwelding is placed on moves back in the pin tool, return locating stud on the 3T oil hydraulic press.After the positioning action, locating stud no longer needs when finishing the assisted sintering weldering, for follow-up planetary pinion and the function pin of being press-fitted, and must the stripping locating stud.
Describedly press the function pin and planetary pinion is: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.Finish final products.
The electric tool gear-box planet stent that the above-mentioned method for preparing electric tool gear-box planet stent is prepared.The loam cake and the lower cover of this electric tool gear-box planet stent form an integral body by the sintering postwelding.
The present invention is resolved into two independently powdered metal parts with electric tool gear-box planet stent: a flanged (FLGD) loam cake and a lower cover that has supporting section, behind the extrusion moulding, weld respectively again.Because extrusion moulding can make leg-supporting density reach 6.9～7.0g/cm respectively
3, and the torsional property of raising product, avoid the root of two supporting legs to crack phenomenon.Make two big parts respectively, be more convenient for guaranteeing the precision of each parts of product, make the existing higher hardness of product, intensity, plasticity, toughness are preferably arranged again, the present invention has realized the low cost of labyrinth product, highi degree of accuracy, processing purpose that manufacturing efficiency is high.
Beneficial effect: the present invention is resolved into two independently powdered metal parts with electric tool gear-box planet stent, behind the extrusion moulding, welds respectively again.Because extrusion moulding can make leg-supporting density reach 6.9～7.0g/cm respectively
3, and the torsional property of raising product, avoid the root of each supporting leg to crack phenomenon.Make two big parts respectively, be more convenient for guaranteeing the precision of each parts of product.The present invention has realized the low cost of labyrinth product, highi degree of accuracy, processing purpose that manufacturing efficiency is high.
Description of drawings
Fig. 1 is the loam cake plan view of electric tool gear-box planet stent of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the lower cover plan view of electric tool gear-box planet stent of the present invention.
Fig. 4 is the sectional view of Fig. 3
Fig. 5 is the sectional view of the integral body of loam cake of the present invention and lower cover sintering postwelding.
Fig. 6 is the sectional view of electric tool gear-box planet stent assembling gear of the present invention.
Fig. 7 is the plan view of electric tool gear-box planet stent assembling gear of the present invention.
Embodiment
The present invention will be further explained below in conjunction with accompanying drawing
The ingredients by weight of loam cake and lower cover is formed: 0.5%C, 3%Ni, 1.5%Mo, residue are Fe.
The ingredients by weight of scolder is formed: 40%Ni, 40%Cu, 20%Mn.
The preparation method comprises:
(1) batching: prepare burden according to above-mentioned prescription.
(2) be shaped: electric tool gear-box planet stent resolves into two independently powdered metal parts: a flanged (FLGD) loam cake and a lower cover that has supporting section, adopt 60 tons of powder extrusion forming machines, the powder metallurgical component material is formed separately by the die cavity extruding.The leg-supporting density of lower cover reaches 6.9～7.0g/cm
3, and guarantee the root flawless of two supporting legs.On the loam cake end face, groove is set.
(3) presintering: respectively loam cake and lower cover are placed common mesh-belt furnace sintering 20min～1h of 700～1200 ℃.
(4) press locating stud: loam cake and lower cover and locating stud are placed in the tool punching press on the aerostatic press of 3T.Upper and lower covers tentatively is bonded together.
(5) sintering weldering: 800～1300 ℃ of body temperatures; in the sintering furnace of speed 50～150mm/mim; under the protection of reducing atmosphere; carry out double sintering; in this process; the effect of oozing of melting by between solder powder and two the parts powder reaches the welding between the part, the high strength electric tool gear-box planet stent that finally is made.
(6) heat treatment: under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated.
(7) move back locating stud: with the integral body of sintering postwelding again the product after Overheating Treatment be placed on special-purpose moving back in the pin tool, on the 3T oil hydraulic press, return locating stud.
(8) press function pin and planetary pinion: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.
After testing, the Key Performance Indicator of product comprises: leg-supporting density 7.0g/cm
3Width 4.30～4.40mm between groove; Function pin centre distance 17.04 ± 0.03mm; Take off pull out force (short pin) 100～120kgf; Take off pull out force (having strong market potential) 200～250kgf.
The ingredients by weight of loam cake and lower cover is formed: 1.0%C, 1.0%Ni, 0.5%Mo, residue are Fe.
The ingredients by weight of scolder is formed: 45%Ni, 30%Cu, 25%Mn.
The preparation method comprises:
(1) batching: prepare burden according to above-mentioned prescription.
(2) be shaped: electric tool gear-box planet stent resolves into two independently powdered metal parts: a flanged (FLGD) loam cake and a lower cover that has supporting section, adopt 60 tons of powder extrusion forming machines, the powder metallurgical component material is formed separately by the die cavity extruding.The leg-supporting density of lower cover reaches 6.9～7.0g/cm
3, and guarantee the root flawless of two supporting legs.On the loam cake end face, groove is set.
(3) presintering: respectively loam cake and lower cover are placed common mesh-belt furnace sintering 20min～1h of 700～1200 ℃.
(4) press locating stud: loam cake and lower cover and locating stud are placed in the tool punching press on the aerostatic press of 3T.Upper and lower covers tentatively is bonded together.
(5) sintering weldering: 800～1300 ℃ of body temperatures; in the sintering furnace of speed 50～150mm/mim; under the protection of reducing atmosphere; carry out double sintering; in this process; the effect of oozing of melting by between solder powder and two the parts powder reaches the welding between the part, the high strength electric tool gear-box planet stent that finally is made.
(6) heat treatment: under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated.
(7) move back locating stud: with the integral body of sintering postwelding again the product after Overheating Treatment be placed on special-purpose moving back in the pin tool, on the 3T oil hydraulic press, return locating stud.
(8) press function pin and planetary pinion: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.
After testing, the Key Performance Indicator of product comprises: leg-supporting density 6.9g/cm3; Width 4.30～4.45mm between groove; Function pin centre distance 17.04 ± 0.04mm; Take off pull out force (short pin) 100～110kgf; Take off pull out force (having strong market potential) 200～240kgf.
Embodiment 3
The ingredients by weight of loam cake and lower cover is formed: 0.2%C, 2.0%Ni, 2.0%Mo, residue are Fe.
The ingredients by weight of scolder is formed: 30%Ni, 45%Cu, 25%Mn.
The preparation method comprises:
(1) batching: prepare burden according to above-mentioned prescription.
(2) be shaped: electric tool gear-box planet stent resolves into two independently powdered metal parts: a flanged (FLGD) loam cake and a lower cover that has supporting section, adopt 60 tons of powder extrusion forming machines, the powder metallurgical component material is formed separately by the die cavity extruding.The leg-supporting density of lower cover reaches 6.9～7.0g/cm
3, and guarantee the root flawless of two supporting legs.On the loam cake end face, groove is set.
(3) presintering: respectively loam cake and lower cover are placed common mesh-belt furnace sintering 20min～1h of 700～1200 ℃.
(4) press locating stud: loam cake and lower cover and locating stud are placed in the tool punching press on the aerostatic press of 3T.Upper and lower covers tentatively is bonded together.
(5) sintering weldering: 800～1300 ℃ of body temperatures; in the sintering furnace of speed 50～150mm/mim; under the protection of reducing atmosphere; carry out double sintering; in this process; the effect of oozing of melting by between solder powder and two the parts powder reaches the welding between the part, the high strength electric tool gear-box planet stent that finally is made.
(6) heat treatment: under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated.
(7) move back locating stud: with the integral body of sintering postwelding again the product after Overheating Treatment be placed on special-purpose moving back in the pin tool, on the 3T oil hydraulic press, return locating stud.
(8) press function pin and planetary pinion: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.
After testing, the Key Performance Indicator of product comprises: leg-supporting density 7.0g/cm3; Width 4.35～4.40mm between groove; Function pin centre distance 17.04 ± 0.05mm; Take off pull out force (short pin) 110～120kgf; Take off pull out force (having strong market potential) 210～250kgf.
Embodiment 4
The ingredients by weight of loam cake and lower cover is formed: 5.0%Ni, 0.2%Mo, residue are Fe.
The ingredients by weight of scolder is formed: 45%Ni, 45%Cu, 10%Mn.
The preparation method comprises:
(1) batching: prepare burden according to above-mentioned prescription.
(2) be shaped: electric tool gear-box planet stent resolves into two independently powdered metal parts: a flanged (FLGD) loam cake and a lower cover that has supporting section, adopt 60 tons of powder extrusion forming machines, the powder metallurgical component material is formed separately by the die cavity extruding.The leg-supporting density of lower cover reaches 6.9～7.0g/cm
3, and guarantee the root flawless of two supporting legs.On the loam cake end face, groove is set.
(3) presintering: respectively loam cake and lower cover are placed common mesh-belt furnace sintering 20min～1h of 700～1200 ℃.
(4) press locating stud: loam cake and lower cover and locating stud are placed in the tool punching press on the aerostatic press of 3T.Upper and lower covers tentatively is bonded together.
(5) sintering weldering: 800～1300 ℃ of body temperatures; in the sintering furnace of speed 50～150mm/mim; under the protection of reducing atmosphere; carry out double sintering; in this process; the effect of oozing of melting by between solder powder and two the parts powder reaches the welding between the part, the high strength electric tool gear-box planet stent that finally is made.
(6) heat treatment: under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated.
(7) move back locating stud: with the integral body of sintering postwelding again the product after Overheating Treatment be placed on special-purpose moving back in the pin tool, on the 3T oil hydraulic press, return locating stud.
(8) press function pin and planetary pinion: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.
After testing, the Key Performance Indicator of product comprises: leg-supporting density 6.8g/cm
3Width 4.25～4.45mm between groove; Function pin centre distance 17.04 ± 0.05mm; Take off pull out force (short pin) 90～120kgf; Take off pull out force (having strong market potential) 200～260kgf.
Embodiment 5
The electric tool gear-box planet stent that above-mentioned arbitrary embodiment is prepared.
As depicted in figs. 1 and 2, be the loam cake of electric tool gear-box planet stent, loam cake is provided with flange.As shown in Figure 3 and Figure 4, be the lower cover of electric tool gear-box planet stent, lower cover is provided with supporting section.As shown in Figure 6, be the integral body of the loam cake and the lower cover sintering postwelding of electric tool gear-box planet stent.As shown in Figure 6 and Figure 7, this electric tool gear-box planet stent comprises loam cake 1 and the lower cover 2 that cooperatively interacts and use, and is provided with planetary pinion between loam cake 1 and lower cover 2.Loam cake 1 and lower cover 2 form an integral body by the sintering postwelding.
Claims (10)
1. method for preparing electric tool gear-box planet stent, it is characterized in that: be crushed to a flanged (FLGD) loam cake and a lower cover that has supporting section respectively, with loam cake and lower cover presintering respectively, be press-fitted locating stud, then, supporting leg sintering with loam cake and lower cover is welded into one again, under 550～1050 ℃ temperature, the product that is welded as a whole is heat-treated again, return locating stud afterwards, compress function pin and planetary pinion at last.
2. the method for preparing electric tool gear-box planet stent according to claim 1 is characterized in that: described loam cake and lower cover all adopt each component powders metallurgy of following parts by weight to make: 0～1.0%C, 1～5%Ni, 0.2～2.0%Mo, residue are Fe.
3. the method for preparing electric tool gear-box planet stent according to claim 1 is characterized in that: described loam cake and lower cover be presintering in 700～1200 ℃ common mesh-belt furnace all.
4. the method for preparing electric tool gear-box planet stent according to claim 1 is characterized in that: the described locating stud that is press-fitted is for being placed in the tool punching press on the aerostatic press of 3T with loam cake and lower cover and locating stud.
5. the method for preparing electric tool gear-box planet stent according to claim 1, it is characterized in that: when flanged (FLGD) loam cake is made in extruding, end face at loam cake is provided with several circular holes, after loam cake and lower cover have been press-fitted locating stud, form groove at loam cake and lower cover mating part, when freezing, in this groove, place scolder, under the locating stud assist location, loam cake, lower cover freezed to be integral.
6. the method for preparing electric tool gear-box planet stent according to claim 5 is characterized in that: described scolder comprises each component of following parts by weight: 30～45%Ni, 30～45%Cu, 10～25%Mn.
7. the method for preparing electric tool gear-box planet stent according to claim 1 is characterized in that: the described locating stud of returning is: the product after Overheating Treatment again of sintering postwelding is placed on moves back in the pin tool, return locating stud on the 3T oil hydraulic press.
8. the method for preparing electric tool gear-box planet stent according to claim 1, it is characterized in that: describedly press the function pin and planetary pinion is: the product that will return behind the locating stud is put tool into together with planetary pinion and function pin, and punching press presses planetary pinion and function pin on the 3T oil hydraulic press.
9. the electric tool gear-box planet stent prepared of the described method for preparing electric tool gear-box planet stent of claim 1.
10. the electric tool gear-box planet stent that the method for preparing electric tool gear-box planet stent according to claim 9 is prepared is characterized in that: the loam cake and the lower cover of electric tool gear-box planet stent form an integral body by the sintering postwelding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534728 CN102003522A (en) | 2010-11-08 | 2010-11-08 | Manufacturing method for planetary support of electric power tool gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534728 CN102003522A (en) | 2010-11-08 | 2010-11-08 | Manufacturing method for planetary support of electric power tool gear box |
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| CN102003522A true CN102003522A (en) | 2011-04-06 |
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| CN 201010534728 Pending CN102003522A (en) | 2010-11-08 | 2010-11-08 | Manufacturing method for planetary support of electric power tool gear box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954200A (en) * | 2011-08-22 | 2013-03-06 | 张家港市九鼎机械有限公司 | Planet carrier output shaft mechanism and processing process thereof |
| CN105643569A (en) * | 2016-03-14 | 2016-06-08 | 扬州保来得科技实业有限公司 | Powder metallurgy stop block |
| CN109312845A (en) * | 2016-06-14 | 2019-02-05 | 舍弗勒技术股份两合公司 | Planetary gear pin with end-side mounting markings and method for producing a planetary gear pin |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793214A (en) * | 1985-11-14 | 1988-12-27 | Fichtel & Sachs Ag | Planet wheel carrier |
| WO2003076825A2 (en) * | 2002-03-05 | 2003-09-18 | Metal Forming & Coining Corporation | Pinion carrier for planetary gear train and method of making same |
| CN101007352A (en) * | 2007-01-30 | 2007-08-01 | 扬州保来得科技实业有限公司 | Processing method of gear supporter in automatic gearbox of automobile |
| CN101474674A (en) * | 2009-01-16 | 2009-07-08 | 扬州保来得科技实业有限公司 | Powder metallurgy production method of internal helical gear |
-
2010
- 2010-11-08 CN CN 201010534728 patent/CN102003522A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793214A (en) * | 1985-11-14 | 1988-12-27 | Fichtel & Sachs Ag | Planet wheel carrier |
| WO2003076825A2 (en) * | 2002-03-05 | 2003-09-18 | Metal Forming & Coining Corporation | Pinion carrier for planetary gear train and method of making same |
| CN101007352A (en) * | 2007-01-30 | 2007-08-01 | 扬州保来得科技实业有限公司 | Processing method of gear supporter in automatic gearbox of automobile |
| CN101474674A (en) * | 2009-01-16 | 2009-07-08 | 扬州保来得科技实业有限公司 | Powder metallurgy production method of internal helical gear |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954200A (en) * | 2011-08-22 | 2013-03-06 | 张家港市九鼎机械有限公司 | Planet carrier output shaft mechanism and processing process thereof |
| CN102954200B (en) * | 2011-08-22 | 2015-08-26 | 张家港市九鼎机械有限公司 | A kind of planet carrier output shaft mechanism and processing technology thereof |
| CN105643569A (en) * | 2016-03-14 | 2016-06-08 | 扬州保来得科技实业有限公司 | Powder metallurgy stop block |
| CN109312845A (en) * | 2016-06-14 | 2019-02-05 | 舍弗勒技术股份两合公司 | Planetary gear pin with end-side mounting markings and method for producing a planetary gear pin |
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Application publication date: 20110406 |