An Outer Cover and Method for Eliminating Dimension Deviation of Rib Structure in Powder Metallurgy Components

A technology of powder metallurgy and structure size, which is applied in the field of powder metallurgy, can solve the problems of secondary processing, etc., and achieve the effect of eliminating sharp corners, improving size deviation, and eliminating concave phenomenon

Active Publication Date: 2020-11-20
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide an outer sheath and a method for eliminating the structural dimension deviation of ribs in powder metallurgy components, to design a reasonable groove of the outer sheath forming die, and to solve the need for The problem of secondary processing

Method used

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  • An Outer Cover and Method for Eliminating Dimension Deviation of Rib Structure in Powder Metallurgy Components
  • An Outer Cover and Method for Eliminating Dimension Deviation of Rib Structure in Powder Metallurgy Components
  • An Outer Cover and Method for Eliminating Dimension Deviation of Rib Structure in Powder Metallurgy Components

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Embodiment

[0065] For attached figure 1 For the product in the example, the rib height is 10mm, and the rib width is 6mm, which are optimized from four aspects: groove width, groove depth, inclination angle and fillet.

[0066] 1. Design of groove depth

[0067] The rib height of the rib is 10mm, according to the empirical formula, the groove depth can be designed as 11.63±0.05mm.

[0068] 2. Design of groove width

[0069] The width of the rib is 6mm. According to the empirical formula, the groove width can be designed as 6.62±0.05mm.

[0070] 3. The design of the inclination angle of the groove

[0071] For this rib, the inclination angle can be designed as 2°30'.

[0072] 4. Design of rounded corners

[0073] The process fillet at the bottom of the groove should be spliced ​​by two arcs with a diameter of 3mm. Figure 5 shown.

[0074] Through the optimization of the groove of the forming die, the measured value of the height dimension of the rib after forming is 10±0.10mm, and...

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Abstract

The invention discloses an outer sheath and method capable of removing size deviation of a rib structure in a powder metallurgical component. The outer sheath is of a groove structure containing ribs,the groove depth and the groove width are both larger than the theoretical height and the theoretical rib width of the ribs, the bottom plane and the side walls of the groove are in transition through an arc splicing structure, and the side walls of the groove incline outwards from the bottom. Through design of the reasonable outer sheath, a die groove is formed, and the problem that after the ribs are formed, secondary machining is needed is solved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and relates to the structural design aspect of an envelope forming die in net shape / near net shape of powder metallurgy. Background technique [0002] Powder metallurgy grid rib components can reduce product weight while maintaining good structural rigidity, and are widely used in air intake mechanisms and casing components of aerospace models. The structural diagram is as follows figure 1 shown. [0003] In the powder metallurgy process, the powder is filled in the cavity and densified after hot isostatic pressing, such as figure 2 shown. Among them, the outer grid ribs are formed by shrinking powder filled in the groove of the forming die. [0004] During the hot isostatic pressing process, the powder will shrink and deform to a certain extent, which will cause a certain amount of deformation in the preset grooves in the outer sheath, and eventually lead to a certain deviation in the struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/15
CPCB22F3/1208B22F3/15
Inventor 徐桂华邓太庆姚草根阴中炜
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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