Preparation method for high-wear-resistance and repairable conical double cylinders

A high wear-resistant, barrel technology, applied in the field of extruder components, can solve the problems of insufficient wear resistance of the bushing, uneven distribution of alloys, insufficient bonding strength, etc., to save replacement costs, improve production efficiency, High bonding strength

Active Publication Date: 2015-12-23
NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear resistance of the bushing of this machine barrel is not good enough, resulting in frequent replacement of the bushing and increasing the cost
[0004] In addition, the barrel of the existing extruder discharge section also adopts the process of centrifugally casting wear-resistant alloy materials, but due to the conical structure, the distribution of the alloy in the centrifugal state is uneven, the bonding strength is not enough, and it is easy to fall off during use

Method used

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  • Preparation method for high-wear-resistance and repairable conical double cylinders
  • Preparation method for high-wear-resistance and repairable conical double cylinders
  • Preparation method for high-wear-resistance and repairable conical double cylinders

Examples

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Effect test

Embodiment 1

[0034] A preparation method of a highly wear-resistant and repairable conical double barrel, which is made by the following method:

[0035] (1) Boring the 45 steel forgings, processing it into a conical double-barrel blank 1 with two intersecting inner holes and a figure-eight cross-section, such as figure 1 and figure 2 shown;

[0036] (2) Use ordinary steel to process the mandrel 2 with the same taper as the inner hole of the barrel, such as image 3 and Figure 4 As shown, the size of the mandrel is 1 mm longer than the inner hole of the barrel, and a layer of iron-based self-fluxing alloy wear-resistant layer 3 is spray-welded on the surface of the two mandrels 2. After the surface is ground, the distance from the size of the head The outer diameter at 1mm is the same as the inner hole size of the end face of the barrel, and then cut off the excess material of the two mandrels according to the inner hole size of the tapered double barrel, such as Figure 5 and Imag...

Embodiment 2

[0045] A preparation method of a highly wear-resistant and repairable conical double barrel, which is made by the following method:

[0046] (1) Boring the 40Cr forgings and processing them into conical double-barrel blanks with inner holes intersecting two circles and cross-sections in a figure-eight ring;

[0047] (2) Use ordinary steel to process a mandrel with the same taper as the inner hole of the barrel. The size of the mandrel is 2mm longer than the inner hole of the barrel. Wear-resistant layer, after grinding the surface, the size of the outer diameter at 2mm from the big and small heads is the same as the inner hole size of the end face of the barrel, and then cut off the excess material of the two mandrels according to the inner hole size of the tapered double barrel, and the cone The double-shaped barrel mandrel is inserted into the barrel blank hole and pressed tightly to form a barrel assembly;

[0048] (3) Put the barrel assembly in a vacuum furnace and heat i...

Embodiment 3

[0056] A preparation method of a highly wear-resistant and repairable conical double barrel, which is made by the following method:

[0057] (1) The 42CrMo forging is bored and processed into a conical double-barrel blank with two intersecting inner holes and a figure-eight cross-section;

[0058] (2) Use ordinary steel to process mandrels with the same taper as the inner hole of the barrel. The size of the mandrels is 3mm longer than the inner hole of the barrel, and a layer of cobalt-based self-fluxing alloy is spray-welded on the surface of the two mandrels. Wear-resistant layer, after grinding the surface, the outer diameter at 3mm from the big and small heads is the same as the inner hole size of the end face of the barrel, and then cut off the excess material of the two mandrels according to the inner hole size of the tapered double barrel, and the cone The double-shaped barrel mandrel is inserted into the barrel blank hole and pressed tightly to form a barrel assembly; ...

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Abstract

The invention discloses a preparation method for high-wear-resistance and repairable conical double cylinders. The preparation method comprises the following steps: carrying out boring machining on a round steel forged piece to form conical double cylinder blanks with inner holes which are two intersected circles and with cross sections which are splayed rings respectively; machining common steel into mandrels having the same conicity as the conicity of the inner holes of the cylinders, spraying and welding a low-melting-point alloy wear-resistant layer on the surfaces of the two mandrels respectively, sleeving the conical double cylinder mandrels in the holes of the cylinder blanks, and compacting to form cylinder assemblies; placing the cylinder assemblies in a vacuum furnace and carrying out heating treatment; and removing redundant mandrel materials on a large head and a small head of each assembly through turning machining, carrying out boring machining on the cylinders, and removing the mandrel materials inlaid in the holes of the cylinders. The preparation method disclosed by the invention solves the problem that the conical double cylinders are difficult to realize centrifugal compound casting, the alloy wear-resistant layers and the inner holes of the conical holes realize metallurgical bonding in a vacuum sintering state, the bonding strength of the metallurgical bonding is higher than that of inlaying hard alloy materials, and the wear-resistant layers cannot fall off during a use process; and moreover, the production efficiency of an extruder is increased, the replacement cost is saved, and the economic benefits are improved.

Description

technical field [0001] The invention relates to the technical field of extruder components, in particular to a preparation method of a highly wear-resistant and repairable conical double barrel. Background technique [0002] As a common extruder equipment, the extruder is used in the plastic processing industry. It is mainly used to extrude thermoplastics such as soft and hard polyvinyl chloride and polyethylene. It can process a variety of plastic products, such as blown film and extruded tubes. , pressing plate, drawing ribbon, etc., can also be used for melt granulation. Existing extruders generally adopt conical twin-screw extruders, and the design structure is relatively simple. The discharge section is subject to large forces and is easy to wear. Finally, the whole machine barrel cannot be used well, the service life is short, and the product quality cannot be guaranteed. [0003] Chinese utility model patent (CN201420250245) discloses an improved conical double-barr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B29C48/68
CPCB23P15/00B29C48/682B29C48/68
Inventor 钱兵孙书刚
Owner NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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