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A manufacturing method and equipment for removing defects in the core of a metal billet

A manufacturing method and metal blank technology, applied in the field of high-quality forging blanks, can solve the problems of inconsistent internal and external mechanical properties of mechanical parts, unable to ensure clean removal of core material defects, low material utilization, etc., to achieve high production efficiency and best effect. Excellent, easy removal process

Active Publication Date: 2018-09-07
长沙天赋机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] All metal materials (ferrous metals and non-ferrous metals) are forged or rolled from cast ingots to form round, square, or hexagonal strips. However, during the solidification process of cast ingots, there must be various Although casting defects have been improved after forging or rolling, they cannot be eliminated fundamentally, which leads to inconsistencies in the internal and external mechanical properties of mechanical parts. For ordinary civilian products, this problem is generally not considered; but for special requirements For military products or aerospace products, this problem cannot be ignored
[0004] The defects of the existing billet removal core material generally include billet upsetting, high punch pressure, flipping and trimming punching or machining, wire cutting and digging; there are two problems in the removal technology of the billet core material in the prior art : ① It cannot guarantee that the core material defects are removed completely; ② The process is complicated, the material utilization rate is low, the production efficiency is low, and the cost is high

Method used

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  • A manufacturing method and equipment for removing defects in the core of a metal billet
  • A manufacturing method and equipment for removing defects in the core of a metal billet
  • A manufacturing method and equipment for removing defects in the core of a metal billet

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Effect test

Embodiment 1

[0029] This embodiment provides a device for removing defects in the core of a metal billet, which includes: a metal billet cutting device, a forging press, a semi-closed extrusion die 1, and a metallographic analysis device (not shown in the figure). The metal billet cutting device in this embodiment is used to split the target metal billet along the predetermined cutting line to obtain a small billet with the core of the metal billet exposed, and the forging press is used to cut the small billet in a semi-closed extrusion die. The forging blank is obtained by forging. The metallographic analysis device is used to conduct metallographic analysis on the forging blank 8 from the surface to the inside to determine the size parameters of the unusable parts. The metal blank cutting device is also used to cut the forging blank to remove unusable parts. part.

[0030] Figure 1-6 The billet used in this embodiment, the semi-closed extrusion die 1 and the specific processing process...

Embodiment 2

[0043] This embodiment provides a method for removing defects in the core of a metal billet, and the method is preferably performed by the equipment in Embodiment 1. The method comprises the steps of:

[0044] Step (1) Take the target metal blank, and divide the target metal blank along the predetermined cutting line to obtain a small blank with the core part of the metal blank exposed. Preferably, the target metal blank is cut into four equal parts or more along the section cutting line.

[0045] What needs to be emphasized here is that for metal blanks, it is preferable to cut by diagonal cutting, which has little effect on pure circular blanks, but for cylindrical, oval, rectangular or similar rectangular ingredients There are unexpected benefits. see image 3It can be found that by adopting the diagonal cutting method, after the billet is cut, the top is relatively flat, while the lower part is a relatively sharp protrusion. After the small billet of this shape is buckl...

Embodiment 3

[0051] In this embodiment, a method for removing defects in the core of a metal billet is proposed, the method comprising:

[0052] (1) Determine the length of the metal blank;

[0053] (2) judging whether the length of the metal blank exceeds a predetermined threshold;

[0054] (3) If the length of the metal blank does not exceed a predetermined threshold (this embodiment not only uses cutting equipment, but also uses a drill to remove defects, and the threshold is determined according to the length of the drill), then:

[0055] (3-1) Carry out metallographic analysis on the material from the surface to the inside to determine the size parameters of the unusable parts;

[0056] (3-2) According to the size parameters of the unusable part, select the drill bit of the corresponding size to drill the unusable part;

[0057] (3-3) Use CNC sawing machine or wire cutting method to divide the hollow material into quarters or more along the section;

[0058] (3-4) Forging the split...

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Abstract

The invention relates to a manufacturing method and equipment for removing metal blank core defects. The method comprises the following steps: (1) a target metal blank is taken, and is cut along a preset cutting line to obtain a small blank with a metal blank core part exposed outside; (2) the small blank (6) obtained by cutting in the step (1) is put in a half-closed extrusion mold (1); the placing direction is that the metal blank core part (6-1) is downwards; and the oriented forging extrusion is performed for the small blank by the half-closed extrusion mold (1) to obtain a forged blank (8); and (3) the forged blank (8) is cut to remove unavailable part. The half-closed extrusion forging and the machining are combined with a core removing process, so that the blank core part is removed more thoroughly; the material is forged by two times, so that the effect is better; and blank crystals are refined through forging, so that the removing process is more convenient, and the production efficiency is high.

Description

technical field [0001] The invention relates to the field of mechanical processing and manufacturing, in particular to the field with higher requirements for the internal structure of mechanical parts. The invention can provide high-quality forging blanks. Background technique [0002] All metal materials (ferrous metals and non-ferrous metals) are forged or rolled from cast ingots to form round, square, or hexagonal strips. However, during the solidification process of cast ingots, there must be various Although casting defects have been improved after forging or rolling, they cannot be eliminated fundamentally, which leads to inconsistencies in the internal and external mechanical properties of mechanical parts. For ordinary civilian products, this problem is generally not considered; but for special requirements For military products or aerospace products, this problem cannot be ignored. [0003] Calculated by weight, about 85% of the components on the aircraft are forgi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/02
CPCB21J1/02B21J5/002
Inventor 周朝辉
Owner 长沙天赋机械设备有限公司