Self-lubricating method of textured coating of gear cold extrusion die

A cold extrusion and texturing technology, which is applied in metal extrusion forming tools, coatings, metal extrusion, etc., can solve the problems of environmental pollution, mold wear, poor lubrication effect of cold extrusion molds, etc., and achieve improved Anti-wear and anti-friction performance, prolong service life and improve lubrication effect

Active Publication Date: 2020-08-25
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above technical problems, the present invention proposes a self-lubricating method of textured coating of a gear cold extrusion die, combining surface coating technology, surface micro-modeling technology, solid lubricant technology and lubricant filling technology, in the cold extrusion of gears The surface of the mold is prepared with a textured coating self-lubricating surface, which improves the anti-wear and anti-friction performance of the cold extrusion mold surface, improves the lubrication effect of the mold surface, improves the forming quality, and prolongs the service life of the mold. Poor lubrication effect, severe mold wear and environmental pollution caused by traditional lubrication methods

Method used

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  • Self-lubricating method of textured coating of gear cold extrusion die

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Effect test

Embodiment 1

[0040] Self-lubrication of textured coating based on gear cold extrusion die surface

[0041] Equipment used: Swiss PLATITπ300 nanocomposite coating equipment, Nd:YAG laser, PG-2 floor metallographic polishing machine, KYX25-2400L ultrasonic cleaning machine, Ohaus Discovery measuring and analyzing balance, ultrasonic filling and pressing device.

[0042] A method for self-lubricating a textured coating of a gear cold extrusion die, comprising the following steps:

[0043] Step 1: Deposit TiAlN Coating

[0044] First, ultrasonically clean the inner ring 5 of the cold extrusion die for 15 minutes, then put the inner ring 5 of the die into the vacuum furnace cavity of the Swiss PLATIT π300 nanocomposite coating equipment, turn on the mechanical pump, and stabilize the pressure of the furnace cavity at 5×10 -3 Pa, the concave mold 5 is radiated and heated by a heater and stabilized at 450° C., the rotation speed of the built-in fixture in the furnace cavity is set to 3 r / min, an...

Embodiment 2

[0052] A method for self-lubricating a textured coating of a gear cold extrusion die, comprising the following steps:

[0053] Step 1: Deposit TiAlN Coating

[0054] First, ultrasonically clean the inner ring 15 of the cold extrusion die for 15 minutes, then put the inner ring 15 of the die into the vacuum furnace cavity of the Swiss PLATIT π300 nanocomposite coating equipment, turn on the mechanical pump, and stabilize the pressure of the furnace cavity at 5×10 -3 Pa, the concave mold 15 is radiated and heated by a heater and stabilized at 450° C., the rotating speed of the fixture built in the furnace cavity is set to 3 r / min, and the concave mold 15 is plasma cleaned for 16 minutes in an argon atmosphere. Using Si target and AlTi (67% Ti, 33% Al) alloy target as the arc source, the deposition time is 150min, and a TiAlN coating 6 with a thickness T of 4 μm is obtained, as figure 1 shown.

[0055] Step 2: Surface micro-modelling

[0056] Utilize two-stage pumping Nd:YAG l...

Embodiment 3

[0062] A method for self-lubricating a textured coating of a gear cold extrusion die, comprising the following steps:

[0063] Step 1: Deposit TiCN coating

[0064] First, ultrasonically clean the inner ring 5 of the cold extrusion die for 15 minutes, then put the inner ring 5 of the die into the vacuum furnace cavity of the Swiss PLATIT π300 nanocomposite coating equipment, turn on the mechanical pump, and stabilize the pressure of the furnace cavity at 5×10 -3 Pa, the concave mold 5 is radiated and heated by a heater and stabilized at 450° C., the rotation speed of the built-in fixture in the furnace cavity is set to 3 r / min, and the concave mold 5 is plasma cleaned for 16 minutes in an argon atmosphere. Using Si target and Ti target as the arc source, the deposition time is 150 min, and the TiCN coating 6 with a thickness T of 3 μm is obtained, as figure 1 shown.

[0065] Step 2: Surface micro-modeling

[0066] Utilize two-stage pumping Nd:YAG laser to carry out micromod...

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Abstract

The invention provides a self-lubricating method of a textured coating of a gear cold extrusion die. The method includes the following steps that the coating is deposited, wherein the hard coating isdeposited on the surface of the inner ring of a female die of the cold extrusion die through a PVD technology; the surface is micro-modeled, wherein a micro-texture is prepared on the surface of the hard coating on the inner ring of the female die of the cold extrusion die; a lubricant is prepared, wherein the composite solid lubricant is prepared; and filling of the lubricant is carried out, wherein the surface micro-texture of the hard coating on the inner ring of the female die is filled with the composite solid lubricant. In combination with a surface coating technology, a surface micro-modeling technology, a solid lubricant technology and a lubricant filling technology, the textured coating is prepared on the surface of the gear cold extrusion die for self-lubricating the surface, theanti-wear and friction-reducing performance of the surface of the cold extrusion die is improved, the lubricating effect of the surface of the die is improved, the forming quality is improved, the service life of the die is prolonged, and the problems that in the forming process of the cold extrusion die, the lubricating effect is poor, the die is seriously abraded, and the environment is polluted in a traditional lubricating manner are solved.

Description

technical field [0001] The invention belongs to the technical field of die surface treatment, and in particular relates to a self-lubricating method for a textured coating of a gear cold extrusion die, which can improve the lubricating performance of the gear cold extrusion die surface and the service life of the die, improve the forming quality of the gear, and reduce the production cost of the enterprise. cost. Background technique [0002] Cold extrusion is an important production process for manufacturing gears. It has the unique advantages of high quality, high efficiency and low cost, and is being highly valued by the equipment manufacturing industry. However, during the process of cold extrusion forming gears, the contact pressure between the billet and the mold is as high as 1000MPa-2500MPa, resulting in poor lubrication conditions, resulting in a huge friction force between the billet and the die cavity, which not only increases the metal deformation resistance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/10B21C23/32C23C14/06C23C14/58F16N15/00
CPCB21C25/10B21C23/32C23C14/5886C23C14/0664C23C14/0641F16N15/00Y02P70/10
Inventor 彭锐张培耘解玄华希俊张彦虎陈诚曹晓彬尹必峰
Owner JIANGSU UNIV
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