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Large copper end-ring manufacturing process

A preparation process and technology of copper end rings, which are applied in the fields of casting, machining and smelting, can solve the problems of production efficiency of difficult blank parts, affecting the quality of the whole machine, and short service life, so as to reduce equipment investment costs, improve physical performance, The effect of shortening the production cycle

Active Publication Date: 2012-10-24
武汉雄驰机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation methods basically cannot produce large-scale copper end rings with an outer diameter of more than 1500 mm or a copper end ring with a weight of more than 200 kilograms. It has been proved that all test data and service life are not up to standard, which seriously affects the quality of the whole machine. The specific manifestations are: micro-crack pores, poor density, poor electrical conductivity, weak tensile strength, etc. The basic reason is that it is difficult to obtain materials Blank parts and low production efficiency, short service life

Method used

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Effect test

Embodiment 1

[0041] Embodiment 1: Product φ1602 (outer diameter)*φ1490 (inner diameter)*48 (thickness) unit mm (Cr contains 0.3%, the rest is Cu)

[0042] 1) Melting: The total weight of the alloy solution is 234 kg, the electrolytic (cathode) copper is 217.2 kg, the copper-chromium master alloy (Cr content 4%) is 16.8 kg, the power of the intermediate frequency furnace is 200kw, and the graphite crucible is 250#. First, a small amount of charcoal is placed at the bottom of the crucible. Gradually add electrolytic (cathode) copper to quickly heat up and melt to 1150-1200 ° C, remove charcoal, add a mixture of 25% perlite, 65% electrode powder and 10% cryolite as a covering agent by weight, and the amount of covering agent added is based on complete coverage. Standard, use 0.234 kg of copper-magnesium alloy for deoxidation. Then add 16.8 kg of preheated copper-chromium master alloy (Cr contains 4%, and the rest is Cu) and rapidly raise the temperature to 1350-1450°C for heat preservation, a...

Embodiment 2

[0048] Embodiment 2: product φ2406*φ2302*57 unit mm (Cr contains 0.3%, all the other are Cu)

[0049] 1) Melting: The total weight of the alloy liquid is 402 kg, the electrolytic (cathode) copper is 371.85 kg, the copper-chromium master alloy (Cr content 4%) is 30.15 kg, the power of the intermediate frequency furnace is 240kw, and the graphite crucible is 500#. Firstly, a small amount of charcoal is placed at the bottom of the crucible, Gradually add electrolytic (cathode) copper to quickly heat up and melt to 1150-1200 ° C, remove charcoal, add a mixture of 25% perlite, 65% electrode powder and 10% cryolite as a covering agent by weight, and the amount of covering agent added is based on complete coverage. Standard, use 0.402 kg of copper-magnesium alloy for deoxidation. Then add 30.15 kg of preheated copper-chromium master alloy (Cr contains 4%, the rest is Cu) and stir carefully, rapidly heat up to 1350-1450°C for heat preservation, adjust the liquid temperature to 1250-13...

Embodiment 3

[0055] Embodiment 3: product φ2238*φ2078*74 unit mm (Zr contains 0.16%, all the other are Cu)

[0056] 1) Melting: electrolytic (cathode) copper 677.914 kg, zirconium 1.086 kg, intermediate frequency furnace power 240kw, zirconia crucible 700# or magnesia furnace volume 700, first add 1.086 kg zirconium and 120 kg electrolytic (cathode) copper to melt (the remaining Electrolytic (cathode) copper preheating), argon environment protection Add the remaining preheated electrolytic (cathode) copper when melting to 1900 ° C, melt and adjust the temperature to 1350 ° C and stir carefully, the melting time is about 100 minutes, adding 0.005-0.01 of the liquid weight % copper-magnesium alloy as a deoxidizer to deoxidize, and make a test rod.

[0057] 2) Centrifugal casting billet: choose a mold with an inner diameter of φ1125mm and a length of 300mm, adjust the length to 242mm with an inner push plate, the mold temperature is 166°C-200°C, the casting temperature is 1280°C, the casting ...

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Abstract

A large copper end-ring manufacturing process comprises the following steps: smelting chromium copper alloy or copper zirconium alloy; centrifugally casting blank; heating and forging; heating, rolling and reaming; lathe processing; project inspection and the like. The process has the following advantages that the addition of microelements chromium or zirconium improves the physical property of an end-ring and prolongs the service life of a product with little influence on the conductive property of the end-ring. Centrifugal casting is adopted so as to overcome the defect that the device such as an extruder can not be used for an end-ring product with a diameter more than 1500mm and blank weight more than 200 kilogram. According to the large copper end-ring manufacturing process, the device investment cost is reduced on one hand, and on the other hand the production processes of rod blanking and circular piece embryonic form blank forging are reduced, the production period is shortened, and the purposes of energy saving, material saving, consumption reduction and economic benefit improvement are achieved. The rolling and reaming technology is adopted, so as to overcome the high cost and hidden quality danger caused by the use of a multi-segment spliced welding mode because an air hammer can not forge the end-ring blank with the diameter more than 1500mm.

Description

technical field [0001] The invention belongs to the technical fields of smelting, casting and mechanical processing. More specifically, it is a preparation process for large-scale copper end rings. The outer diameter of its copper end ring product specification is more than 1500mm, and the weight of the copper end ring is more than 200 kg. Background technique [0002] The methods used to prepare copper end rings include sand casting, metal casting, welding of multiple profiles, cutting and forging of profile rods, etc. However, the existing preparation methods basically cannot produce large-scale copper end rings with an outer diameter of more than 1500 mm or a copper end ring with a weight of more than 200 kilograms. It has been proved that all test data and service life are not up to standard, which seriously affects the quality of the whole machine. The specific manifestations are: micro-crack pores, poor density, poor electrical conductivity, weak tensile strength, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C22C9/00C22C1/03B22D13/04
Inventor 周尤利汤胜华
Owner 武汉雄驰机电设备有限公司