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A kind of preparation method of high wear-resisting, repairable conical double barrel

A technology of high wear resistance and barrel, applied in the preparation of repairable conical double barrel, high wear resistance field, can solve the problems of insufficient wear resistance of bushings, uneven alloy distribution, insufficient bonding strength, etc. , to achieve the effect of saving replacement cost, improving production efficiency and high bonding strength

Active Publication Date: 2017-04-12
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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  • A kind of preparation method of high wear-resisting, repairable conical double barrel
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  • A kind of preparation method of high wear-resisting, repairable conical double barrel

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Embodiment 1

[0034] Such as Figure 1 to Figure 10 Shown, a kind of preparation method of high wear-resisting, repairable conical double barrel is made by the following method:

[0035] (1) Carry out boring processing to 45 steel forgings, and process it into a conical double-barrel blank 1 whose inner hole is two intersecting circles and whose cross section is a figure-eight ring;

[0036] (2) Use ordinary steel to process the mandrel 2 with the same taper as the inner hole of the machine barrel. The size of the mandrel is 1 mm longer than the axial direction of the inner hole of the machine barrel. The surface of the two mandrels 2 is spray-welded with a layer of iron-based self-melting Wear-resistant alloy layer 3. After grinding the surface, the outer diameter at 1 mm from the size head 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. , put the conic...

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, processing it into a conical double-barrel blank with two intersecting circles in the inner hole and a figure-eight ring in the cross section;

[0047] (2) Use ordinary steel to process a mandrel with the same taper as the inner hole of the machine barrel. The size of the mandrel is 2mm longer than the axial direction of the inner hole of the machine barrel. Spray welding a layer of nickel-based self-fluxing alloy on the surface of the two mandrels 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 t...

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) Boring the 42CrMo forging, and processing it into a conical double-barrel blank whose inner hole is two intersecting circles and whose cross section is a figure-eight ring;

[0058] (2) Use ordinary steel to process a mandrel with the same taper as the inner hole of the machine barrel. The size of the mandrel is 3mm longer than the axial direction of the inner hole of the machine barrel. Spray welding a layer of cobalt-based self-fluxing alloy 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 barre...

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Abstract

The invention discloses a method for preparing a highly wear-resistant and repairable cone-shaped double barrel. Firstly, a round steel forging is subjected to boring processing, and processed into a cone whose inner hole is two intersecting circles and whose cross section is a figure-eight ring. Shaped double-barrel blank; use ordinary steel to process mandrels with the same taper as the inner hole of the barrel, spray and weld a layer of low-melting-point alloy wear-resistant layer on the surface of the two mandrels, and insert the conical double-barrel mandrel into the machine The barrel blank hole is pressed tightly to form a barrel assembly; the barrel assembly is placed in a vacuum furnace to heat up; the excess mandrel material of the above assembly is removed by turning, and the above barrel is bored to remove the machine. The core rod material embedded in the barrel hole. The invention solves the difficult problem of centrifugal compound casting with conical double barrels. Under the vacuum sintering state, the metallurgical combination of the alloy wear-resistant layer and the inner wall of the conical hole is realized, and the bonding strength is higher than that of the inlaid hard alloy material. The grinding layer will not fall off; and the production efficiency of the extruder is improved, the replacement cost is saved, and the economic benefit is 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 Patents(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