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Clutch inner hub of hybrid gearbox of automobile and manufacturing method thereof

A gearbox and clutch technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low drilling efficiency in the side sintered state, difficult side hole burrs, high raw material cost, etc., to improve product quality stability, solve The effect of low drilling efficiency and reduction of production cost

Pending Publication Date: 2021-05-04
江苏智造新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitations of this powder metallurgy recompression and refiring process are the high cost of D39 raw materials, and the need to use multiple sets of molds, resulting in high cost, low drilling efficiency in the side sintered state, large loss of drill bits, difficulty in removing burrs from the side holes, and additional machines for heat treatment deformation. Processing to ensure dimensional accuracy

Method used

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  • Clutch inner hub of hybrid gearbox of automobile and manufacturing method thereof
  • Clutch inner hub of hybrid gearbox of automobile and manufacturing method thereof
  • Clutch inner hub of hybrid gearbox of automobile and manufacturing method thereof

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Effect test

preparation example Construction

[0036]A hybrid gearbox clutch internal hub preparation method, including the steps of:

[0037]Step 1: Designing the composition and mixing of the materials: mixed according to the mass mass percent;

[0038]Step 2: Temperature die pressing: The finished powder metallurgy raw material is placed in a forming machine, and the cylindrical heating rod and the thermocouple are loaded into the female mold. The mold is heated to a temperature 93 ° C ± 5 ° C;

[0039]Step 3: Edible side punch: the inner hub is performed on the dedicated green processing equipment to form a number of uniformly distributed oil holes;

[0040]Step 4: Sintering hardening: Put the forming green body in a high temperature, sintering, sintering in an aerobic environment, and then performing air-cooled quenching, the cooling rate is 2.5 to 5 ° C / s, resulting in a sintered nub;

[0041]Step 5: Back to the fire: Sintering the hub in the air at 180 ° C ± 5 ° C for 60min for 60 min to restore stress;

[0042]Step Six: Ultrasonic clean...

Embodiment 1

[0045]A hybrid gearbox clutch internal hub preparation method, including the steps of:

[0046](1) Element: Designing the composition and mixing of raw materials, mixing the following raw materials in mass: powder metallurgy component mass: Cr: 1.8%; Ni: 2.0%; C: 0.6%, special lubricant: 0.45%; the remaining is FE and inevitable impurities.

[0047](2) Temperature die pressing: The powder metallurgy material formulated is placed in a forming machine, and the cylindrical heating rod and the thermocouple are loaded into the female model. The mold is heated to the temperature 93 ° C ± 5 ° C, and the product is sintered before the product Forming density 7.35g / cm3, Each forming section divided density ≤0.2g / cm3However, the joints of the green body have no cracks, and the automatic brush of the green brush is released.

[0048](3) The side of the green machine is perforated, forming 24 uniform distributed φ3 oil holes; the clamp containing the internal hub is positive to the drill bit, drille...

Embodiment 2

[0056]A hybrid gearbox clutch internal hub preparation method, including the steps of:

[0057](1) Mix: Designing the composition of the raw material and mixing the following raw materials by mass: powder metallurgy component: CR: 1.7%; Ni: 2.1%; C: 0.54%; special lubricant: 0.5%; the remaining is Fe and inevitable impurities.

[0058](2) Temperature die pressing: The powder metallurgy material formulated is placed in a forming machine, and the cylindrical heating rod and the thermocouple are loaded into the female model. The mold is heated to the temperature 93 ° C ± 5 ° C, and the product is sintered before the product Forming density 7.30g / cm3, Each forming section divided density ≤0.2g / cm3However, the joints of the green body have no cracks, and the automatic brush of the green brush is released.

[0059](3) The side of the green machine is perforated, forming 24 uniform distributed φ3 oil holes; the clamp containing the internal hub is positive to the drill bit, drilled from the sid...

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Abstract

The invention provides a clutch inner hub of a hybrid gearbox of an automobile. According to the component configuration, the clutch inner hub comprises, by mass percentage, 1.7%-1.9% of Cr, 1.9%-2.1% of Ni, 0.54%-0.66% of C, 0.4%-0.5% of special lubricant and the balance Fe and inevitable impurities. The invention further provides a manufacturing method of the clutch inner hub of the hybrid gearbox of the automobile. The manufacturing method comprises the steps of material mixing; warm mold pressing; green body machining side face punching; sintering and hardening; tempering; ultrasonic cleaning, oil immersion and spin-drying operation; and packaging and warehousing. Various parameters of the inner hub which is manufactured according to new material components can meet the assembly and usage requirements of a clutch of the hybrid gearbox. According to the manufacturing method, the warm mold pressing technology and the sintering and hardening technology are combined and cooperate with new materials and the green body machining side face punching technology, the high-performance and low-cost clutch inner hub is produced, and therefore the production cost is greatly reduced, and the product quality stability is improved.

Description

Technical field[0001]The present invention relates generally to the technical field of powder metallurgical auto parts, and in particular, there is a car hybrid gearbox clutch inner hub and a preparation method thereof.Background technique[0002]The low fuel consumption model is the main force of future new energy vehicles, and the hybrid technology route is the trend of automotive development, where the clutch nub is an important part of a mixed gearbox. The hybrid gearbox clutch hub is a structural member having high performance, shape, and the inner hub body provided with an inner hub chamber. The side surface of the inner hub body is provided with a hydrophilic hole of the inner hub, and the oil hole penetrates the side of the inner hub. Connect the inner hub to the outside. The oil hole of the side must not have influencing burrs of the inner hub.[0003]The process of traditional production clutch inner hub is a forging or powder metallurgy compression buffer process, where:[0004...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F1/00
CPCB22F5/00B22F2998/10B22F2999/00B22F1/102
Inventor 施昌旭夏敏石小荣黄亿奇张艳伟
Owner 江苏智造新材有限公司