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Method for forging mold cavity (female mold) module

A cavity and concave core technology, which is applied in the field of metal forging, can solve the problems of long time consumption, waste of metal materials, and many processing steps, and achieve the effect of reducing processing steps, avoiding waste and saving time.

Active Publication Date: 2016-01-06
FUSHUN SPECIAL STEEL SHARES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When manufacturing small-section special-shaped forgings at home and abroad, there are problems such as uneven iron running of metal billets, uneven structure of forgings, difficult performance indicators to meet standards, and poor surface appearance. The present invention also draws on some methods to solve the above problems
When manufacturing large-scale molds at home and abroad, most of them use forging modules and then machine them into molds. In the process of machining molds, there are many processing steps, time-consuming, and waste of metal materials.

Method used

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  • Method for forging mold cavity (female mold) module
  • Method for forging mold cavity (female mold) module
  • Method for forging mold cavity (female mold) module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The size and shape are (900+20 / -0×1000+20 / -0) mm cavity (concave) module.

[0035] 1. Smelting: UHP+LF+VD steelmaking is adopted, one 30t ingot is poured, the VD tapping temperature is 1565°C, furnace number: 13203013752;

[0036] 2. Forging: ①When forging, heat the steel ingot to 1230°C in the first fire, press the clamp after holding it for 18 hours; The height of the ingot is 1150mm, the upsetting ratio is ≥ 2, and it is drawn once to grow into a flat square of 1300mm×1200mm with a length of 2550mm; ③The steel ingot is returned to the furnace and heated to 1230°C with three fires, and then secondly upset after 5 hours of heat preservation. The height of the ingot before upsetting is 2550mm, and the height of the ingot after upsetting 1270mm, upsetting ratio ≥ 2; figure 1 , figure 2 As shown, there are two heavy pressings in the second drawing, the reduction in the first pass is 190mm, and the reduction in the second pass is 180mm to ensure the deformation of the c...

Embodiment 2

[0048] The size and shape are (850+20 / -0×970+20 / -0) mm cavity (concave) module.

[0049] 1. Smelting: UHP+LF+VD steelmaking is adopted, one 27t ingot is poured, the VD tapping temperature is 1565°C, furnace number: 13203013752;

[0050] 2. Forging: ①When forging, heat the steel ingot to 1230°C in the first fire, press the pliers after holding it for 18 hours; The height of the ingot is 1150mm, the upsetting ratio is ≥ 2, and it is drawn once to grow into a 1200mm×1100mm flat square with a length of 2580mm; ③The steel ingot is returned to the furnace and heated to 1230°C with three fires, and then secondly upset after 5 hours of heat preservation. The height of the ingot before upsetting is 2580mm, and the height of the ingot after upsetting 1270mm, upsetting ratio ≥ 2; image 3 , Figure 4 As shown, there are two heavy pressings in the second drawing, the reduction of the first pass is 180mm, and the reduction of the second pass is 180mm to ensure the deformation of the core. ...

Embodiment 3

[0062] The size and shape are 982+20 / -0mm×1015+20 / -0mm cavity (concave center) module.

[0063] 1. Smelting: UHP+LF+VD steelmaking is adopted, one 33t ingot is poured, the VD tapping temperature is 1560℃, furnace number: 13203023903;

[0064] 2. Forging: ①When forging, heat the steel ingot to 1230°C in the first fire, press the pliers after holding it for 20 hours; The steel ingot height is 1160mm, the upsetting ratio is ≥ 2, and the length of the steel ingot is 1300mm×1200mm flat and 2560mm in one drawing; ③The steel ingot is returned to the furnace and heated to 1230°C with three fires, and the second time is upsetting after 5 hours of heat preservation. 1250mm, upsetting ratio ≥ 2; Figure 5 , Figure 6 As shown, there are two heavy pressings in the second drawing, the reduction in the first pass is 200mm, and the reduction in the second pass is 195mm to ensure the deformation of the core. It is forged into a 1060mm×1090mm module with a wide anvil, and the width and thick...

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Abstract

The invention discloses a method for forging a mold cavity (concavity) module. By means of hot machining, multi-heating-number and multi-direction forging is adopted, rolling reduction of different heating numbers and in different directions is controlled, and internal structures are improved. According to the mold cavity (concavity) forged through forging tools such as a wide anvil, a narrow anvil, a marking knife and a big platform, it is guaranteed that the dimension and appearance are qualified. Normalizing and tempering are adopted in heat treatment, so that structure hardness is uniform. Compared with the prior art, the method has the advantages that 1, the smelting steel tapping temperature is controlled, big ingot as-cast structures are improved, and composition segregation is reduced; 2, by means of the multi-heating-number and multi-direction forging mode, the mechanical properties of the large-cross-section module can meet standard requirements; 3, according to the mold cavity (concavity) forged through the forging tools such as the wide anvil, the narrow anvil, the marking knife and the big platform, the defect that billet iron smelting is nonuniform is overcome, and dimension and appearance requirements are met; and 4, the mold cavity (concavity) module which approximates to a mold in appearance is forged, machining procedures during mechanical mold machining can be simplified, time is saved, and waste of metal materials is reduced.

Description

technical field [0001] The invention belongs to a metal forging method, in particular to a forging method of a cavity (concave center) module, which is used for manufacturing plastic molds for producing plastic products. Background technique [0002] Mold steel is a special alloy steel, among which plastic mold steel is mainly used to manufacture various molds for plastic products by molding, including carbon plastic mold steel, pre-hardened plastic mold steel, free-cutting plastic mold steel, Corrosion-resistant plastic mold steel, age-hardening plastic mold steel, high wear-resistant plastic mold steel, etc. The large cross-section, cavity (concave) module belongs to carbon plastic mold steel. After the module is made into a mold, the mold must bear pressure from all directions during the plastic molding process. In order to maintain dimensional accuracy, high mechanical properties and hardness are required. Therefore, Higher mechanical properties and hardness are importa...

Claims

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Application Information

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IPC IPC(8): B21J5/00C22C38/40B21J5/06B21J5/08B21K29/00
Inventor 马野于海鹏刘振天燕云牟风刘玉芬刘晓刘明刘宝石冯淑玲孙秀华杨天亮汝亚彬康爱军曹丽红
Owner FUSHUN SPECIAL STEEL SHARES
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