Manufacturing method of ultrahigh cylindrical parts

A manufacturing method and cylinder technology, applied in metal rolling, metal rolling, etc., can solve the problems of complex preparation process, difficult punching, long process, etc., and achieve low process cost, short batch production cycle, and high yield Effect

Active Publication Date: 2016-02-03
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The current methods for producing tubular parts have several technical benefits that make them faster and cheaper compared to previous techniques like casting or machining processes. However they also result in smaller sizes due to their larger inner diameters (approximately 650 - 900 mm) and thinner walls at certain points along its length. This limits how flexible it may design different types of pipes based on these standards.

Problems solved by technology

This patents discusses different methods for producing nonmetallic materials called cylindrically shaped components without requiring excessive time or resources during manufacturing compared to traditional casting techniques like die castings. These new technologies have advantages over existing ones due to their ability to produce these types of products at higher speeds while maintaining product quality standards.

Method used

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  • Manufacturing method of ultrahigh cylindrical parts
  • Manufacturing method of ultrahigh cylindrical parts
  • Manufacturing method of ultrahigh cylindrical parts

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The specifications of the cylinder parts produced in this embodiment are as follows: outer diameter Φ690mm, wall thickness 60mm and height 870mm, and the height-to-diameter ratio reaches 1.3.

[0035] The specific production method is as follows:

[0036] (1) Tube blank production (45MN fast forging machine): 30Si2MnCrMoVE steel vacuum consumable ingot Φ638mm×2400mm, such as figure 1 Shown; Φ500mm×3800mm bar is forged by 45MN fast forging machine, such as figure 2 shown.

[0037] Key process parameters: the heating temperature of the vacuum consumable ingot is 1200°C, and the holding time is 5h; the parameters of the forging process are set: the forging start temperature is 1060°C, and the forging stop temperature is 860°C.

[0038] (2) Tube blank annealing (annealing furnace): the annealing heating temperature is 670°C, the holding time is 25h, the cooling rate is 30°C / h, the furnace temperature is 350°C, and the cooling method after the furnace is air cooling;

[...

Embodiment 2

[0049] The specifications of the cylinder parts produced in this embodiment are as follows: outer diameter Φ650mm, wall thickness 60mm and height 745mm.

[0050] The specific production method is as follows:

[0051] (1) Tube billet production (45MN fast forging machine): 30Si2MnCrMoVE steel vacuum consumable ingot Φ638mm×2400mm; 45MN fast forging machine forging Φ500mm×3800mm bar.

[0052] Set process parameters: heating temperature of vacuum consumable ingot is 1170°C, holding time 6h; forging process parameters: start forging temperature 1150°C, stop forging temperature 900°C;

[0053] (2) Tube blank annealing (annealing furnace): annealing temperature 660°C, holding time 25h, cooling rate 30°C / h, furnace temperature 320°C, cooling method after furnace is air cooling;

[0054] (3) Raw pipe production (unit 460): heat the pipe billet at a temperature of 1220°C, holding time for 2.5 hours, the specification after the first fire piercing is Φ520*90, and the specification afte...

Embodiment 3

[0063] The specifications of the cylindrical body obtained in this embodiment are as follows: the outer diameter is 700 mm, the wall thickness is 90 mm, and the height is 890 mm.

[0064] The specific production method is as follows:

[0065] (1) Tube billet production (45MN fast forging machine): 30Si2MnCrMoVE steel vacuum consumable ingot Φ638mm is used to forge Φ500mm tube billet through 45MN fast forging machine,

[0066] Set process parameters: heating temperature 1170°C, holding time 6h; forging process parameters: start forging temperature 1150°C, stop forging temperature 900°C;

[0067] (2) Tube blank annealing (annealing furnace): annealing temperature 660°C, holding time 25h, cooling rate 30°C / h, furnace temperature 320°C, cooling method after furnace is air cooling;

[0068] (3) Raw pipe production (unit 460): heat the pipe billet at a temperature of 1220°C, holding time for 2.5 hours, the specification after the first fire piercing is Φ520*90, and the specificatio...

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Abstract

The invention discloses a manufacturing method of ultrahigh cylindrical parts. The specification range of the cylindrical parts produced by the method is characterized in that the outer diameter is 650-900mm, the height is 700-900mm, and the height-to-diameter ratio is 1-1.3. The method comprises the following steps: melting and pouring, forging, annealing bars or tube blanks, thermally piercing, annealing pierced billets or annular blanks, grinding rings and annealing the cylindrical parts. The method has the advantages of short batch production cycle, high qualified product ratio and low process cost.

Description

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Claims

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Application Information

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Owner DAYE SPECIAL STEEL CO LTD
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