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A device and method for molybdenum crucible double-wheel staggered hot-state powerful spinning

A technology of spinning forming and powerful spinning, which is applied in the field of powerful spinning, can solve the problems of reducing the roughness of the inner surface, achieve the effect of improving the quality of the inner surface, reducing the amount of single deformation, and solving the effects of poor working environment

Active Publication Date: 2020-03-27
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, in the existing hot spinning process, the heating is mostly carried out by manual hand-held heating torches.
Furthermore, although the circumferential layout of the rotary wheels has been determined, the axial layout of the 2-3 rotary wheels has not yet been designed in detail, which is very important for ensuring the circumferential consistency of the wall thickness of the spinning parts and the axial variation of the wall thickness. Continuity, reduction of inner surface roughness, and improvement of forming efficiency have a great influence. Therefore, a reasonable axial stagger structure of the roller must be designed.

Method used

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  • A device and method for molybdenum crucible double-wheel staggered hot-state powerful spinning
  • A device and method for molybdenum crucible double-wheel staggered hot-state powerful spinning
  • A device and method for molybdenum crucible double-wheel staggered hot-state powerful spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] preparation A spinning molybdenum crucible with a height of 400mm and a bottom thickness of 2.0mm, such as Figure 6-7 shown;

[0096] (1) Using 5CrNiMo alloy as raw material, with Image 6 The inner size of the molybdenum crucible shown is the outer size of the mandrel. After forging, tempering, rough machining, quenching and tempering, and fine machining, the surface roughness of the prepared mandrel reaches Ra0.8μm, and the surface hardness is ≥HRC55. The fit clearance of the press spindle is -0.08mm. After fastening the mandrel on the spinning equipment, the no-load axial runout of the mandrel does not exceed 0.15mm, and the no-load radial runout does not exceed 0.1mm.

[0097] (2) Using H13 as the raw material, 40°, 30°, 22°, and 5° are respectively used as the spinning forming angles of the front knife, back knife, feed, and molding curves, and then the curves are smoothly connected according to three arcs Design the contours of the front spinner wheel and th...

Embodiment 2

[0108] The prepared diameter is A spinning molybdenum crucible with a height of 469.9mm and a bottom thickness of 4.5mm, such as Figure 8-9 shown;

[0109] Referring to Example 1, the process conditions different from Example 1 and related parameters are shown in Table 1.

[0110] The processing parameter of table 1 embodiment 2 and relevant data

[0111]

Embodiment 3

[0113] preparation A spinning molybdenum crucible with a height of 406.4mm and a bottom thickness of 4.5mm, such as Figure 10-11 As shown, referring to embodiment 1, the process conditions different from embodiment 1 and relevant parameters are as shown in table 2.

[0114] The processing parameter of table 2 embodiment 3 and relevant data

[0115]

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Abstract

The invention discloses a molybdenum crucible double-wheel staggered thermal state powerful spinning forming device, which includes a setting system, two sets of spinning forming systems and two sets of automatic online heating systems; the two sets of spinning forming systems are distributed in axial staggered distances On both sides of the shaping system, two sets of automatic online heating systems are respectively distributed on both sides of the shaping system; the shaping system is used for shaping the molybdenum plate, the spinning forming system is used The molybdenum sheet is heated during press forming. The device can use the molybdenum plate as the raw material to produce molybdenum metal rotary products with large length-to-diameter ratio, variable cross-section and curved generatrix at one time without interruption. The molybdenum crucible prepared by the spinning forming method of the device has uniform circumferential wall thickness, uniform wall thickness thinning transition in the height direction, accurate size, no cracks, and no surface defects.

Description

technical field [0001] The invention belongs to the technical field of powerful spinning, and in particular relates to a molybdenum crucible double-wheel staggered thermal state powerful spinning forming device, and the invention also relates to a method for using the device to carry out molybdenum crucible double-wheel staggered thermal state strong spinning forming method. Background technique [0002] Molybdenum crucible is a kind of important molybdenum and molybdenum alloy special-shaped structural parts, which are widely used as containers for sapphire single crystal crystallization, glass smelting, rare earth smelting, zinc smelting, and high-temperature furnace lining components. Press) + machining", stamping and other methods of processing. However, for molybdenum crucibles with large size, large aspect ratio, high surface quality requirements, and small and variable wall thickness, the "sintering + forging (extrusion) + machining" method not only has too low materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/16B21D37/16B21D51/18
CPCB21D22/16B21D37/16B21D51/18
Inventor 冯鹏发党晓明张常乐左羽飞赵虎王娜陈二雷胡林张铁军
Owner JINDUICHENG MOLYBDENUM CO LTD
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