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Hard tooth face sugar press used reducer and hard tooth face processing method

A processing method and technology of hard tooth surface, applied in mechanical equipment, gear transmission, belt/chain/gear, etc., can solve the problems of short service life, bulky, tooth surface wear, etc., to improve the accuracy level and reduce the volume , the effect of prolonging the service life

Inactive Publication Date: 2007-02-07
NANJING HIGH SPEED & ACCURATE GEAR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hard gear reducer with a medium-hard tooth surface for the actual problems of low yield, serious wear and pitting of the tooth surface, short service life, large volume and low precision when used in a sugar press. Reducer for tooth surface sugar press and processing method for hard tooth surface

Method used

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  • Hard tooth face sugar press used reducer and hard tooth face processing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Depend on figure 1 It can be seen that the structure of the sugar press reducer is: the first-stage gear shaft 1, the first-stage large gear 2, the second-stage gear shaft 3, the second-stage large gear 4, the third-stage gear shaft 5, and the third-stage The gear parts in the large gear assembly 7 are all made of high-strength high-quality alloy steel 20CrNi2MoA, and the hardness of the tooth surface is HRC58-62. They are respectively positioned in the box body 8 through the bearing 6, and are formed according to the double-shunt mode of the central drive power. In this embodiment, the diameter of the addendum circle of the herringbone gear on the first stage gear shaft 1 is φ320mm, and the weight is 0.6 tons; the diameter of the addendum circle of the first stage large gear 2 is φ990mm, and the weight is 0.9 tons; The diameter of the addendum circle of the II-stage gear shaft 3 is φ500mm, and the weight is 0.9 tons; the diameter of the addendum circle of the II-stage ...

Embodiment 2

[0017] Take high-quality, high-strength, and high-quality alloy steel 20CrNi2MoA forgings for normalizing, take samples to test the chemical composition and do mechanical and mechanical performance experiments; after confirming that the material is qualified, the rough car blank is subjected to ultrasonic flaw detection inspection, and hobbing is carried out with a special round-head grinding hob, and then enters Heat treatment process, carburizing and inspecting the workpiece after gear hobbing, carburizing layer depth and metallographic structure, quenching, low-temperature tempering to form a hard tooth surface, and then undergoing root shot peening treatment, finishing each part, and finally grinding the teeth to form High-precision hard tooth surface, the gear accuracy grade is not lower than the 6th grade of ISO1328 international standard. During the specific implementation, the carburizing temperature is 920-930°C, the effective carburizing layer depth of the teeth is 0....

Embodiment 3

[0019] Taking the overall reduction ratio and rated output torque of Example 1 as the design technical requirements, medium-hard tooth surface materials are used. The medium-hard tooth surface materials of large gears at all levels are 35CrMo. The heat treatment is quenched and tempered. The tooth surface hardness ranges from HB250 to 300, the pinion nitriding material is 35CrMoVA, the heat treatment is nitriding after quenching and tempering, the precision is grade 7, and the tooth surface hardness is HV500-550. According to the design of ISO6336-1996 (calculation of bearing capacity of cylindrical spur gear and helical gear) and ISO1328-1997 (international gear accuracy standard in the 1990s), the calculation results of the gear sizes of the reducer at all levels are as follows:

[0020] The addendum circle diameter of the herringbone gear on the first stage gear shaft 1 is φ370mm, which is 50mm larger than the corresponding carburizing and quenching gear, and the increase ra...

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Abstract

The invention relates to a speed reducer of sugar maker with rigid tooth surface, and relative rigid tooth surface treatment, wherein it comprises: the I gear axle, I large gear, II gear axle, II large axle, III gear axle, and III large gear are made from high-strength alloy steel; the rigidity of tooth surface is HRC58-62; the treatment comprises: machining the blank, and rolling tooth on it; immerging carbon, checking the depth of carbon layer and the metal structure, quenching, and tempering at low temperature to form the rigid tooth surface; then strengthening the tooth root, and refining it; abrading the tooth to form high-accuracy rigid tooth surface, whose accuracy level is not lower than six level of ISO1328 standard. And the invention has the advantages that: since all gears have rigid tooth surfaces, the abrasion resistance and load ability of gear are improved to reduce or avoid point corrosion, and prolong the service life, reduce the weight and reduce the volume.

Description

technical field [0001] The invention relates to a reducer for a hard-tooth surface sugar press and a processing method for the hard-tooth surface. Background technique [0002] The reducer is a necessary supporting equipment for the sugar press. In the 1960s and 1970s in my country, the reducer of the sugar press generally used medium-hard tooth surface materials for large gears. Among them, the medium-hard tooth surface materials for large gears were quenched and tempered by 35CrMo or 45. For steel, the heat treatment is quenched and tempered, and then hobbed. The hardness range of the tooth surface is HB250~300; Nitriding of the tooth surface, the precision of the nitriding pinion is generally 7 grades, and the hardness range of the tooth surface is HV500-550. [0003] The speed reducer produced by the above method generally can only satisfy the sugar extractors that squeeze 2, 3,000 tons or 4,000 tons of sugarcane per day. Therefore, under the historical conditions at tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/20C23F17/00C23C8/22C21D1/18
Inventor 陈永道陈励国杨欣荣雷海宁陈逸华
Owner NANJING HIGH SPEED & ACCURATE GEAR GRP
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