CN110434568A - A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique - Google Patents
A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique Download PDFInfo
- Publication number
- CN110434568A CN110434568A CN201810416311.4A CN201810416311A CN110434568A CN 110434568 A CN110434568 A CN 110434568A CN 201810416311 A CN201810416311 A CN 201810416311A CN 110434568 A CN110434568 A CN 110434568A
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- CN
- China
- Prior art keywords
- bevel gear
- spiral bevel
- metallurgical technique
- powder metallurgical
- low module
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
Lack number of teeth spiral bevel gear powder metallurgical technique the invention discloses a kind of low module the following steps are included: determining the structure of screw conic tooth using three-dimensional digital-to-analogue mode, and in the case where engaging emulation mode, carries out the shape in associated contact area and the test of drive noise；Powder pressing forming will be matched after helical angle and pressure angle correction of the flank shape to screw conic tooth；The product of compression moulding is placed on close furnace to be sintered；Inner hole and end face are machined, precision processing is carried out to product.The present invention uses advanced powder metallurgical technique, can carry out industrial mass production and go out complicated low module lacking number of teeth powder metallurgy spiral bevel gear, any surface finish, noise when engagement is small, product teeth portion even density, manufacturing cost is low, can meet mass production requirement.
Description
Technical field
The present invention relates to gear manufacturing technology, in particular to a kind of low module lacks number of teeth spiral bevel gear powder metallurgy work
Skill.
Background technique
It is a kind of common gear of industry manufacture that low module, which lacks number of teeth spiral bevel gear,.Domestic and international industrialized production always with
To rely on dedicated spiral bevel gear cutting production.Equipment investment is big, and production efficiency is low, at high cost, unstable quality, Wu Faman
The requirement of the quality and quantity produced in enormous quantities enough.
Summary of the invention
To overcome micron order low module helical gear high production cost existing in the prior art, production efficiency is low to be asked
Topic, the present invention provides a kind of low modules to lack number of teeth spiral bevel gear powder metallurgical technique.
Specific technical solution is as follows:
A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique, comprising the following steps:
Step 1: determining the structure of screw conic tooth using three-dimensional digital-to-analogue mode, and in the case where engaging emulation mode, carry out related
The shape of contact zone and the test of drive noise；
Step 2: by dosed powder compression moulding after the helical angle and pressure angle correction of the flank shape to screw conic tooth；
Step 3: the product of compression moulding being placed on close furnace and is sintered；
Step 4: machining inner hole and end face carry out precision processing to product.
Preferably, the gear mass in the step 1 in screw conic tooth is provided with reinforcing rib.
Preferably, the cone tooth tooth top in the step 1 in screw conic tooth and tooth root are rounded corner.
Preferably, the helical angle of screw conic tooth carries out -35 °~35 ° of correction of the flank shape in the step 2.
Preferably, the pressure angle of screw conic tooth carries out 0 °~35 ° of correction of the flank shape in the step 2.
Preferably, when suppressing powder in the step 2, density is carried out to gear upper, middle and lower and is accurately controlled, and density is 6.8
~7.6 grams/mm, 5~10 tons/mm of pressing pressure.
Preferably, when suppressing powder in the step 2, concentricity inside and outside gear is accurately controlled, and concentricity is less than
0.02mm。
Preferably, the temperature being sintered in the step 3 is 2/3~3/4 times of parent metal fusing point.
Preferably, the temperature being sintered in the step 3 is 1100 °~1250 °, speed 60~150mm/ minutes.
Preferably, the step 3 further includes carrying out carburizing heat treatment to product by Multifunctional heat treatment furnace, so that product
Hardness be greater than Hv650, the temperature of carburizing heat treatment is 760~950 °, and soaking time is 60~200 minutes.
Compared with the prior art, the invention has the following beneficial effects:
The present invention uses advanced powder metallurgical technique, can carry out industrial mass production and go out complicated low module
Few number of teeth powder metallurgy spiral bevel gear, any surface finish, noise when engagement is small, and product teeth portion even density, manufacturing cost is low,
Mass production requirement can be met.
Detailed description of the invention
Fig. 1 is that a kind of low module of the present invention lacks number of teeth spiral bevel gear powder metallurgical technique flow chart.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
The invention discloses a kind of low modules to lack number of teeth spiral bevel gear powder metallurgical technique, as shown in Figure 1, including following
Step:
Step 1: determining the structure of screw conic tooth using three-dimensional digital-to-analogue mode, and in the case where engaging emulation mode, carry out related
The shape of contact zone and the test of drive noise；Preferably, the gear mass in the present invention in screw conic tooth is provided with reinforcing rib, and
Cone tooth tooth top and tooth root in screw conic tooth are rounded corner.
Step 2: by powder pressing forming after the helical angle and pressure angle correction of the flank shape to screw conic tooth, specifically, to screw conic
The helical angle of tooth carries out -35 °~35 ° of correction of the flank shape, and 0 °~35 ° of correction of the flank shape is carried out to the pressure angle of screw conic tooth.When suppressing powder,
It carries out density to gear upper, middle and lower accurately to control, and density is 6.8~7.6 grams/mm, 5~10 tons/mm of pressing pressure.Suppress powder
When material, concentricity inside and outside gear is accurately controlled, and concentricity is less than 0.02mm.Preferably, the pressed density in the present invention is
7.2 grams/mm, pressing pressure is 8 tons,
Step 3: it is parent metal fusing point that the product of compression moulding, which is placed on close furnace to be sintered the temperature of sintering,
2/3~3/4 times.Specifically, the temperature of sintering is 1100 °~1250 °, speed 60~150mm/ minutes.Preferably, in the present invention
Sintering temperature be 1135 °, speed be 120mm/ minutes, step 3 further includes being seeped by Multifunctional heat treatment furnace to product
Carbon heat treatment so that the hardness of product be greater than Hv650, carburizing heat treatment temperature be 760~950 °, soaking time be 60~
200 minutes, it is preferred that the heat treatment temperature in the present invention is 850 °, and soaking time is 90 minutes.
Step 4: machining inner hole and end face carry out precision processing to product.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (10)
1. a kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: the following steps are included:
Step 1: determining the structure of screw conic tooth using three-dimensional digital-to-analogue mode, and in the case where engaging emulation mode, carry out associated contact
The shape in area and the test of drive noise；
Step 2: by dosed powder compression moulding after the helical angle and pressure angle correction of the flank shape to screw conic tooth；
Step 3: the product of compression moulding being placed on close furnace and is sintered；
Step 4: machining inner hole and end face carry out precision processing to product.
2. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
It states the gear mass in step 1 in screw conic tooth and is provided with reinforcing rib.
3. a kind of low module according to claim 2 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
Stating cone tooth tooth top in step 1 in screw conic tooth and tooth root is rounded corner.
4. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
State the correction of the flank shape in step 2 to -35 °~35 ° of the helical angle progress of screw conic tooth.
5. a kind of low module according to claim 4 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
State the correction of the flank shape in step 2 to 0 °~35 ° of the pressure angle progress of screw conic tooth.
6. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
When stating compacting powder in step 2, density is carried out to gear upper, middle and lower and is accurately controlled, and density is 6.8~7.6 grams/mm, compacting pressure
5~10 tons/mm of power.
7. a kind of low module according to claim 6 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
When stating compacting powder in step 2, concentricity inside and outside gear is accurately controlled, and concentricity is less than 0.02mm.
8. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
State 2/3~3/4 times that the temperature being sintered in step 3 is parent metal fusing point.
9. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that: institute
Stating the temperature being sintered in step 3 is 1100 °~1250 °, speed 60~150mm/ minutes.
10. a kind of low module according to claim 1 lacks number of teeth spiral bevel gear powder metallurgical technique, it is characterised in that:
The step 3 further includes carrying out carburizing heat treatment to product by Multifunctional heat treatment furnace, so that the hardness of product is greater than
The temperature of Hv650, the carburizing heat treatment are 760~950 °, and soaking time is 60~200 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810416311.4A CN110434568A (en) | 2018-05-03 | 2018-05-03 | A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810416311.4A CN110434568A (en) | 2018-05-03 | 2018-05-03 | A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110434568A true CN110434568A (en) | 2019-11-12 |
Family
ID=68427536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810416311.4A Pending CN110434568A (en) | 2018-05-03 | 2018-05-03 | A kind of low module lacks number of teeth spiral bevel gear powder metallurgical technique |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1150106A (en) * | 1997-07-31 | 1999-02-23 | Jatco Corp | Porous parts, and production of porous parts |
| CN101502879A (en) * | 2009-01-16 | 2009-08-12 | 马鞍山市华东粉末冶金厂 | Method for producing small modulus duplicate gear from powder metallurgy |
| CN103231051A (en) * | 2013-03-30 | 2013-08-07 | 安徽省恒宇粉末冶金有限公司 | Powder metallurgy bevel gear and preparation method thereof |
| CN105665716A (en) * | 2016-01-25 | 2016-06-15 | 金华市宇辰粉末冶金有限公司 | Powder metallurgy spiral bevel gear and preparation method and application thereof |
| CN207111883U (en) * | 2017-06-29 | 2018-03-16 | 扬州市富恒机械有限公司 | Powder metallurgy spiral bevel gear |
| CN207111880U (en) * | 2017-06-29 | 2018-03-16 | 扬州市富恒机械有限公司 | A kind of powder metallurgy spiral bevel gear |
-
2018
- 2018-05-03 CN CN201810416311.4A patent/CN110434568A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1150106A (en) * | 1997-07-31 | 1999-02-23 | Jatco Corp | Porous parts, and production of porous parts |
| CN101502879A (en) * | 2009-01-16 | 2009-08-12 | 马鞍山市华东粉末冶金厂 | Method for producing small modulus duplicate gear from powder metallurgy |
| CN103231051A (en) * | 2013-03-30 | 2013-08-07 | 安徽省恒宇粉末冶金有限公司 | Powder metallurgy bevel gear and preparation method thereof |
| CN105665716A (en) * | 2016-01-25 | 2016-06-15 | 金华市宇辰粉末冶金有限公司 | Powder metallurgy spiral bevel gear and preparation method and application thereof |
| CN207111883U (en) * | 2017-06-29 | 2018-03-16 | 扬州市富恒机械有限公司 | Powder metallurgy spiral bevel gear |
| CN207111880U (en) * | 2017-06-29 | 2018-03-16 | 扬州市富恒机械有限公司 | A kind of powder metallurgy spiral bevel gear |
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