Unlock instant, AI-driven research and patent intelligence for your innovation.

Variable valve high-density powder metallurgy VVT rotor and manufacturing method thereof

A powder metallurgy, high-density technology, used in machines/engines, mechanical equipment, engine components, etc., can solve the problem of difficult to achieve high density, high strength and high precision of VVT rotors, high production and processing costs, and increased process complexity. and other problems, to achieve the effect of light weight, low production cost and beautiful appearance

Active Publication Date: 2015-08-26
LAIWU XINYI SINTERED METAL PROD CO LTD
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used VVT rotor includes a cylindrical rotor body with a smooth outer surface, a central hole for installing the camshaft, a limit boss, a blade installation groove, a weight-reducing hole and a positioning pin hole, and the positioning pin hole is set on the limit boss There are 4 blade grooves, 3 of which are set on half of the peripheral wall of the columnar body, and the other 1 blade groove is set on the outer wall side of the limiting boss. The blade groove is relatively shallow, and the blade groove position requires Only 0.02mm, the strength and precision requirements are very high, and the precision reaches 6.5 grades; the limit boss is set on one side of the column, and the width accounts for 1/7 of the surrounding wall of the column, and the positioning pin hole is set on the limit boss. In the middle; there are 5 weight-reducing holes arranged equidistantly in the cylinder of the cylindrical body rotor, and the weight-reducing holes are blind holes; at present, this kind of VVT rotor is made of medium carbon steel or alloy steel through processing and heat treatment, and its disadvantages are: due to The shape of the VVT ​​rotor is complex, and the dimensional

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Variable valve high-density powder metallurgy VVT rotor and manufacturing method thereof
  • Variable valve high-density powder metallurgy VVT rotor and manufacturing method thereof
  • Variable valve high-density powder metallurgy VVT rotor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 An embodiment of the invention is given. Reference figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 Make the present invention. The variable valve high-density powder metallurgy VVT rotor includes a cylindrical body 1, a central hole 2, a weight-reducing hole 3, and a blade slot 5 with a smooth outer surface. The axis of the central hole 2 coincides with the axis of the cylinder 1, and In the installation of the camshaft; the blade grooves 5 are arranged equidistantly on the circumference of the cylinder 1, and the outer side of the blade groove 5 is open, and the bottom wall of the blade groove 5 is a circular arc transition, which is used for inserting the blade; : The said blade grooves 5 are arranged at equal distances in five, among which two adjacent blade grooves 5 are provided with positioning pin holes 4 for installing the locking device; other adjacent blade grooves 5 are provided with reducing T...

Embodiment 2

[0044] The structure of the variable valve high-density powder metallurgy VVT rotor is the same as the first embodiment.

[0045] The manufacturing method of variable valve high-density powder metallurgy VVT rotor is characterized by:

[0046] The weight percentages of the chemical components of the high-density powder metallurgy raw materials are: 0.2% of plasticizer (Polylub), 1.0% of carbon powder, 1.0% of copper powder, 5.0% of nickel, 0.4% of micronized wax, and the balance is water atomization Iron powder.

[0047] The manufacturing method of the variable valve high-density powder metallurgy VVT rotor includes the following manufacturing steps:

[0048] (1) Mixing with a blender: the plasticizer (Polylub) 0.2%, carbon powder 1.0%, copper powder 1.0%, nickel 5.0%, micro powder wax 0.4%, and the balance is water atomized iron powder Weigh 100 pieces of raw materials, put them in the mixer, mix for 50 minutes, and store them in the mixer for 20 hours.

[0049] (2) Pressing into a v...

Embodiment 3

[0055] The structure of the variable valve high-density powder metallurgy VVT rotor is the same as the first embodiment.

[0056] The manufacturing method of variable valve high-density powder metallurgy VVT rotor is characterized by:

[0057] The weight percentages of the chemical components of the raw materials of high-density powder metallurgy are: plasticizer (Polylub) 0.4%, carbon powder 0.2%, copper powder 5.0%, nickel 1.0%, micro powder wax 0.6%, and the balance is water atomization Iron powder.

[0058] The manufacturing method of the variable valve high-density powder metallurgy VVT rotor includes the following manufacturing steps:

[0059] (1) Mixing with a blender: the plasticizer (Polylub) 0.4%, carbon powder 0.2%, copper powder 5.0%, nickel 1.0%, micro powder wax 0.6%, and the balance is water atomized iron powder Weigh out 100 pieces of raw materials, put them in the mixer, mix for 80 minutes, and store them in the mixer for 28 hours.

[0060] (2) Pressing into a variabl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Heightaaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a variable valve high-density powder metallurgy VVT rotor and a manufacturing method thereof. The rotor comprises a cylinder, a center hole, weight reducing holes and vane grooves. The rotor is characterized in that five vane grooves are arrayed at equal distance, a locating pin hole is formed between two adjacent vane grooves, the weight reducing holes are formed between other adjacent vane grooves, and the cylinder, the center hole, the weight reducing holes, the vane grooves and a locating pin are subjected to material mixing, pressing and sintering to form a whole with plasticizer, carbon powder, copper powder, polymeric wax and the balance of water atomization iron powder which are weighed according to proportion as raw materials. The variable valve high-density powder metallurgy VVT rotor is reasonable in structure and attractive in appearance, alloying is promoted by plastifying high-temperature sintering, accordingly, accuracy is high, density is high, hardness is high, weight is low, production cost is low, efficiency can be improved, service life can be prolonged, the product density reaches 7.4 g/cm<3>-7.5 g/cm<3>, and the tensile strength reaches 800 mpa.

Description

Technical field [0001] The invention relates to an improvement of a variable valve VVT ​​rotor and a manufacturing method thereof, in particular to a variable valve high-density powder metallurgy VVT rotor and a manufacturing method thereof. Background technique [0002] As we all know, the VVT ​​rotor is a variable valve adjustment device, used to adjust the valve intake at different speeds, improve combustion rate, increase engine power and reduce exhaust emissions. The currently used VVT rotor includes a cylindrical rotor body with a smooth outer surface, a center hole for camshaft installation, a limiting boss, a blade mounting groove, a weight reduction hole and a positioning pin hole, and the positioning pin hole is set on the limiting boss On the upper side, there are 4 blade grooves, of which 3 blade grooves are provided on half of the peripheral wall of the cylindrical body, and the other blade groove is provided on the side of the outer wall of the limiting boss. The bl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F01L1/34C22C38/16C22C33/02B22F3/16B22F5/10
Inventor 吕元之
Owner LAIWU XINYI SINTERED METAL PROD CO LTD