New energy vehicle transmission gearshift mechanism special-shaped powder metallurgy support and manufacturing method thereof

A new energy vehicle and shifting mechanism technology, applied in mechanical equipment, transmission control, metal processing equipment, etc., can solve the problems of low material utilization rate, low product qualification rate, complex structure, etc., and achieve high material utilization rate, The effect of high dimensional accuracy and simplified process

Inactive Publication Date: 2018-10-19
丁妙严
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two manufacturing methods can process the new energy vehicle gear shift mechanism support that meets the requirements of use, but there are obvious shortcomings: the new energy vehicle gear shift mechanism support is a special-shaped component, the structure is complex, and the precision requirements are high. Higher comprehensive mechanical properties are required. Using the above two manufacturing methods, the entire manufacturing process is complicated, costing materials and labor, and the product qualification rate is low; when manufacturing new energy vehicle transmission and shifting mechanism supports in batches, the material used for a single piece is 930g About, the cutting process takes more than 2 hours of work, but the net weight of the final product is only 240g, and the material utilization rate is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In the prefabricated mold, the alloy powder material with a uniform particle size ≥ 100 objects is filled through sealing, stirring and mixing, and the ingredients are 4.5% Cu, 3% Ni, 2.5% Mo, 1.0% C, 0.5% zinc stearate in proportion by weight, The rest is Fe powder; pressed into an alloy steel billet at 10tf / ㎝²; the billet is sintered at a high temperature of 1140±2°C, kept in a reducing gas for 2.5h, and then cooled to room temperature through a water jacket; the formed The blank is placed in the finishing die for extrusion; the extruded product is partially cut and trimmed.

[0033] Compared with the processing of blanks made of 45 steel or cast steel, this embodiment has a simple process, saves a lot of raw materials, and improves processing accuracy, but the comprehensive mechanical properties of the product such as tensile strength and fatigue strength are poor, and the powder metallurgy used More expensive non-ferrous metals such as copper, nickel, and molybdenum...

Embodiment 2

[0035] Fill the prefabricated mold with alloy powder materials with a particle size ≥ 100 meshes that have been sealed, stirred and mixed uniformly. The ingredients are 2.5% Cu, 1.5% Ni, 1% Mo, 2% Ti, 1.0% C, 0.5% Hard Zinc fatty acid, the rest is Fe powder; pressed into an alloy steel billet at 10tf / ㎝²; the billet is sintered at a high temperature of 1110±2°C, kept in a reducing gas for 2.5h, and then cooled to room temperature through a water jacket ; Put the formed billet into the finishing die for extrusion; carry out local cutting and trimming on the extruded product.

[0036] Compared with Example 1, this embodiment reduces the consumption of more expensive non-ferrous metals such as Cu, Ni, Mo, etc., the sintering temperature is lowered, the tensile strength and fatigue strength are similar, and the wear resistance and corrosion resistance are obviously improved; The volume change of the final product is close to zero, and high dimensional accuracy can be obtained.

Embodiment 3

[0038] Fill the prefabricated mold with alloy powder materials with particle size ≥ 100 meshes that have been sealed, stirred and mixed uniformly. The ingredients are 2.5% Cu, 1.5% Ni, 1% Mo, 2% Ti, 0.5-1% rare earth element La , 1.0% C, 0.5% zinc stearate, and the rest is Fe powder; it is pressed into an alloy steel blank at 10tf / ㎝², and the rare earth element La is represented by the rare earth compound La 2 o 3 Add in the form; the billet is sintered at a high temperature of 1110±5°C, and kept in a reducing gas for 2.5 hours, and then cooled to room temperature through a water jacket; the formed billet is placed in a finishing die for extrusion; after extrusion The products are partially cut and trimmed.

[0039] Compared with Example 2, the main mechanical properties of the product in this embodiment are greatly improved: the tensile strength is doubled, the impact energy is doubled, the forged metallographic structure pearlite content reaches 90%, and other indicators su...

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Abstract

The invention discloses a new energy vehicle transmission gearshift mechanism special-shaped powder metallurgy support and a manufacturing method thereof. The new energy vehicle transmission gearshiftmechanism special-shaped powder metallurgy support and the manufacturing method thereof are applied to a powder metallurgy technology, ally elements like C, Cu, Ni, Mo and Ti and rare earth element La are added on an iron-based material to be prepared into a blank with the alloy steel property, high-temperature sintering, cooling, hot forging shaping and extrusion are conducted, and finally, little cutting and trimming shaping are conducted. The process is simple, the additive amount of valuable non-ferrous metals is low, the utilization rate of the material is high, labor time is saved, theintensity and abrasion resistance requirements can be met without need of high-frequency quenching, deformation and discoloring defects caused by quenching are overcome, the manufacturing cost is low,the manufacturing precision is high, and the comprehensive mechanical performance is good. The production efficiency is high, and the comprehensive cost is low.

Description

technical field [0001] The invention relates to a support for a shifting mechanism of an automobile transmission and a manufacturing method thereof. More specifically, the present invention relates to a special-shaped powder metallurgy support for a shifting mechanism of a new energy vehicle transmission and a manufacturing method thereof. Background technique [0002] In the gear shifting mechanism of new energy vehicles, the support is a special-shaped component used for gear shifting. It is in frequent motion and is a key part of the gear shifting mechanism. It not only needs to have a high size and Shape accuracy, and requires comprehensive mechanical properties such as high tensile strength, fatigue resistance and wear resistance. The support of the existing new energy vehicle transmission and shifting mechanism is usually made of 45 steel or cast steel as a blank, and then it is made through multiple processes such as mechanical cutting and heat treatment. Both of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00F16H63/30C22C38/16C22C38/08C22C38/12C22C38/14
CPCF16H63/30C22C38/005C22C38/08C22C38/12C22C38/14C22C38/16B22F5/00B22F2998/10B22F1/10B22F3/02B22F3/10B22F2003/175B22F3/20B22F2003/247
Inventor 丁妙严
Owner 丁妙严
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