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Mold for achieving in-mold rapid forming and quenching

A mold and solid technology, applied in the direction of forming tools, quenching devices, manufacturing tools, etc., can solve the problems of mutual influence, affecting the forming performance of sheet metal, and the rapid drop of local temperature of hot metal slabs, etc., to achieve small heat capacity, skin thin effect

Active Publication Date: 2019-03-08
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that in the hot forming process of existing sheet metal parts, when all the forming dies are in a cold state (hot stamping) or a certain side of the die is in a cold state (cold and hot composite die forming), it is easy to appear a hot state metal plate. Due to the rapid drop in the local temperature of the billet, which affects the formability of the sheet metal, the forming process and the quenching process are coupled, interacted, and cannot be reasonably coordinated. A mold that realizes rapid forming and quenching in the mold is proposed.

Method used

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  • Mold for achieving in-mold rapid forming and quenching
  • Mold for achieving in-mold rapid forming and quenching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] combine figure 1 And Fig. 2 illustrates, a kind of mold that realizes in-mold rapid prototyping and quenching, (1) forming mold comprises upper mold and lower mold, and lower mold is a traditional overall structure; The thin-walled skin is tightly wrapped on the internal solid core; (3) The shape and size of the outer surface of the thin-walled skin are the same as the shape and size of the part; (4) The surface of the internal solid core is provided with vertical ribs and mutual Connected grooves, thin-walled skins and grooves form specific channels after contact; (5) Medium inlet holes and outlet holes are provided on the internal solid core, and are connected to the channels formed by the skin and grooves.

[0039] The above-mentioned mold for realizing rapid forming and quenching in the mold, its working process is carried out according to the following steps:

[0040] Step 1. According to the material type, complexity, precision requirements, etc. of the metal she...

Embodiment 2

[0048] combine image 3 And Fig. 4 illustrates, another kind of mold that realizes rapid prototyping and quenching in the mold, (1) forming mold comprises upper mold and lower mold, and upper mold and lower mold are all composite structures; (2) upper mold and lower mold are all made of The thin-walled skin and the internal solid mold core are composed, and the thin-walled skin is tightly wrapped on the internal solid mold core; (3) the shape and size of the outer surface of the thin-walled skin are the same as the shape and size of the part; (4) the surface of the internal solid mold core is provided with Ribs and interconnected grooves, the thin-walled skin and the grooves contact to form a specific channel; (5) There are medium inlet holes and outlet holes on the internal solid mold core, which are connected to the channel formed by the skin and grooves. connect.

[0049] The working process of the above-mentioned mold for rapid forming and quenching in the mold is the sam...

Embodiment 3

[0051] Example Three: Combining figure 1 As shown in Fig. 4, a mold for realizing rapid prototyping and quenching in the mold, in step 1, the thin-walled skin in the combined mold adopts a metal sheet with good thermal conductivity, small heat capacity, high strength, and wear resistance, such as a stainless steel plate , high-temperature alloy plate or titanium alloy plate, etc., the thickness of the thin-walled skin is 0.2-0.5mm, and the thin-walled skin is in close contact with the vertical ribs of the internal solid mold core and does not deform during the contact process with the metal slab. Others are the same as the first and second embodiments.

[0052] Due to the thin wall thickness and small heat capacity of the skin, during the forming stage, when the hot metal slab contacts the skin, the temperature of the skin will rise quickly but will not conduct much away from the hot metal slab The heat will not cause the temperature of the hot metal slab to drop rapidly. Ad...

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Abstract

The invention provides a mold for achieving in-mold rapid forming and quenching. The mold comprises an upper mold, a binder ring and a lower mold, the upper mold is composed of an inner solid mold core and a thin-walled skin, and interconnected grooves are formed between the inner solid mold core and the thin-walled skin. In the forming stage, no heat insulation material such as filler or fillinggas exists in the grooves, and a low-temperature medium is introduced into the grooves in the quenching stage. The mold has the advantages that the forming and quenching processes are relatively independent and have little influence on each other, the skin is small in wall thickness and small in heat capacity, the grooves are filled with the heat insulation materials, the problem that a hot plateblank and a cold mold are rapidly cooled after making contact during forming can be avoided, and rapid cooling and quenching of the formed hot plate blank can be achieved. The mold core is prepared from common mold materials through common machining equipment, the mold manufacturing period is short, and the cost is low. The mold can be used for achieving rapid forming and quenching of metal materials of different types and thicknesses.

Description

technical field [0001] The invention relates to a mold for forming metal plate parts, in particular to a mold capable of realizing rapid forming and quenching of metal plate parts in the mold. Background technique [0002] For metal sheet parts that can be strengthened by heat treatment (such as 2000 series, 6000 series, 7000 series aluminum alloy sheets, 22MnB5 boron steel sheets), heat treatment strengthening is usually required for the formed parts (for aluminum alloy sheets, solid solution quenching is first performed to form Supersaturated solid solution, and then artificial aging precipitation strengthening; for 22MnB5 boron steel plate, first heating and heat preservation to austenitize, and then rapid cooling and quenching to form martensite). However, since the sheet metal parts need to undergo multiple heating and cooling during the heat treatment process, the shape and size of the parts are easily changed due to uneven thermal expansion and contraction, thermal st...

Claims

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Application Information

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IPC IPC(8): B21D37/10B21D37/16C21D1/673
CPCB21D37/10B21D37/16C21D1/673B21D22/208B21D37/01B21D22/022B21D37/02B21D37/08
Inventor 苑世剑何祝斌凡晓波林艳丽王国峰亓昌
Owner DALIAN UNIV OF TECH
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