CN113000754B

CN113000754B - Novel process for forging Christmas tree

Info

Publication number: CN113000754B
Application number: CN202110288254.8A
Authority: CN
Inventors: 赵吉; 钮秋华
Original assignee: Badu Mechanical Forging Suzhou Co ltd
Current assignee: Badu Mechanical Forging Suzhou Co ltd
Filing date: 2021-03-18
Publication date: 2024-06-11
Anticipated expiration: 2041-03-18

Abstract

The invention discloses a novel process for producing a Christmas tree forging piece, which comprises the steps of cogging and blanking, wherein a billet raw material is subjected to upsetting and drawing to obtain a phi 320-specification cogged ingot, sawing and blanking is performed through sawing equipment, forging is performed, twice heating is performed during forging, forging is completed after the twice heating is finished, the billet is heated through a natural gas heat accumulating type heating furnace during the first heating, heat is preserved, the billet is preserved until the initial forging temperature is reached, when the initial forging temperature is preserved, the billet is forged out of the furnace, the billet is separated after oxide is removed, a small foot is pinched by a press shoulder 110 to phi 245 round, the pinched small foot is fed into a first-channel cogged ingot mould, the mould is upsetted, and the billet is heated in a furnace after the ingot is ejected. The beneficial effects of the invention are as follows: according to the novel process for the Christmas tree forgings, batch small-shape complex forgings are obtained in a combined mode of free forging and die forging on the hammers, so that the production efficiency is improved, the weight of the forgings is reduced, people can conveniently and rapidly produce and manufacture the forgings, and the working progress is greatly improved.

Description

Novel process for forging Christmas tree

Technical Field

The invention relates to a hammer forging process, in particular to a novel process for a Christmas tree forging, and belongs to the technical field of hot forming.

Background

The free forging on the hammer has the advantages of larger flexibility, short production period, lower production efficiency than die forging, lower equipment precision, simple shape, low dimensional precision, rough surface, high labor intensity of workers, lower relative technical level and difficult realization of mechanized mass production; the die forging is relatively high in production efficiency, and can obtain a forging with a relatively complex shape, but the investment of die forging equipment corresponding to a relatively large forging is far higher than that of free forging equipment on a hammer, and the die forging equipment is limited by equipment capacity, so that the investment cost of the equipment is relatively high, and the manufacturing period of a professional forging die is long and the cost is high. At present, how to improve the overall performance of the forging, improve the production efficiency, reduce the weight of the forging and save the cost is key in the production of the forging with small batch and complex shape.

Disclosure of Invention

The invention aims to provide a novel process for a Christmas tree forging, which aims to solve the problems in the background technology.

The invention realizes the aim through the following technical scheme, and the novel process for the Christmas tree forging comprises the following steps:

Step one: cogging and blanking, wherein the billet raw material is subjected to upsetting and drawing processes to obtain a cogged material with the specification phi of 320 mm;

Step two: sawing and blanking by sawing machine equipment;

step three: forging, namely performing twice firing, and completing forging after the twice firing is finished.

Preferably, the height-diameter ratio of the blank is controlled to be 2.0-2.5mm.

Preferably, in the first firing, the blank is heated by a natural gas heat accumulating type heating furnace, and the blank is heated and is kept at the initial forging temperature.

Preferably, when the initial forging temperature is kept, discharging and forging, dividing the blank after removing oxide skin, pinching a small foot 110mm long to phi 245mm round, feeding the pinched blank into a head channel and discharging the blank from the die, upsetting the die, discharging the blank, and returning the blank to the furnace for heating.

Preferably, after removing oxide skin from the blank of the head die, the small feet are covered by a cover die for preforming.

Preferably, the cover die is controlled not to be eccentric, then the cover die is fed into a forming die to be die-forged into small feet, and finally the forging is completed.

The beneficial effects of the invention are as follows: according to the process, the batch small-shape complex forgings are obtained through a combined mode of free forging and die forging on the hammer, so that the production efficiency is improved, the weight of the forgings is reduced, the cost is saved, the rapid production and manufacturing of people are facilitated, and the working progress is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the main structure of a forging of the present invention;

FIG. 2 is a schematic view of a prefabricated composite mold according to the present invention;

FIG. 3 is a schematic view of a forming mold assembly according to the present invention;

FIG. 4 is a schematic view of a cover mold structure according to the present invention;

FIG. 5 is a schematic diagram of the structure of the blank according to the present invention;

fig. 6 is a schematic diagram of a process of separating and pinching small feet according to the invention;

FIG. 7 is a schematic view of a preform forming structure of the pier nose of the present invention;

fig. 8 is a schematic diagram of a mold forming structure according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, a novel process for producing a tree forging comprises the following steps:

and (3) blanking, namely upsetting and drawing a billet raw material to obtain a blank with the specification of phi 320mm, sawing and blanking by using sawing machine equipment, forging, and performing twice firing when forging, and completing forging after the twice firing is finished.

The height-diameter ratio of the blank is controlled to be 2.0-2.5mm. During the first time, heating the blank through a natural gas heat accumulating type heating furnace, preserving heat while heating, preserving heat to a forging temperature, discharging and forging the blank after removing the oxide skin, dividing the blank into small feet with the length of 110mm by pinching a head to a circle of phi 245mm, feeding the blank with the small feet into a head and discharging a blank mold, upsetting the blank to fill the mold, returning the blank to the furnace after discharging the mold, removing the oxide skin from the blank discharged from the head mold, covering the small feet with a cover mold for preforming, controlling the cover mold not to be eccentric, feeding the small feet into the forming mold by using upper die forging, and finally completing forging.

The working principle of the invention is as follows: the process obtains batch small-shape complex forgings through a combined mode of free forging and die forging on a hammer, as shown in figure 1.

The first step: and (5) blanking, namely upsetting and drawing the billet raw material to obtain an opened billet with the specification phi of 320 mm. The method is characterized in that the cogging step mainly comprises the steps of eliminating original defects such as internal looseness of billet raw materials, providing round billets with optimal specification for subsequent forging, controlling the height-diameter ratio of the ideal billets to be 2.0-2.5mm, mainly avoiding forging defects such as folding and the like caused by subsequent forging, and sawing and blanking by sawing machine equipment according to the blanking weight of the forgings required by the forging process;

and a second step of: forging:

(1) First heat: heating the blank by a natural gas heat accumulating type heating furnace, preserving heat for a certain time to the initial forging temperature, discharging and forging, dividing the blank after removing oxide skin, pinching a small foot with a length of 110mm by a shoulder press to phi 245mm, feeding the pinched small foot blank into a head channel blank discharging mold (figure 2) and upsetting the mold, discharging the blank, returning the blank to the furnace for heating, and mainly controlling the proper firing time to avoid forging defects such as folding and the like or the insufficient stamping of the small foot of the divided material to a forming mold (figure 3) caused by subsequent forging;

(2) Second heat time: removing oxide skin from the blank of the head die, covering the small foot preform by using a cover die (figure 4), controlling the cover die not to be eccentric, and then feeding the small foot preform into a forming die (figure 3) to stamp the small foot; and (5) completing forging. In fig. 7, the pier head preform is formed, and in fig. 8, the cap tip is molded in a mold. The process obtains batch small-shape complex forgings through a combination mode of free forging and die forging on a hammer, and the small-shape complex forgings are shown in figure 1. The invention designs and prefabricates a set of assembling die in advance, comprising a first-pass blank-out assembling die, shown in figure 2, a prefabricating forming assembling die, shown in figure 3, and a prefabricating cover die, shown in figure 4. According to the process, the batch small-shape complex forgings are obtained through a combined mode of free forging and die forging on the hammer, so that the production efficiency is improved, the weight of the forgings is reduced, the cost is saved, the rapid production and manufacturing of people are facilitated, and the working progress is greatly improved.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Standard parts used by the invention can be purchased from the market, and special-shaped parts can be customized according to the description of the specification and the drawings.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A process for forging a Christmas tree is characterized in that: the method comprises the following steps:

Step two: sawing and blanking by sawing machine equipment;

Step three: forging, during forging, twice firing is carried out, the forging is completed after the twice firing is finished, during the first firing, the blank is heated through a natural gas heat accumulating type heating furnace, heat is preserved while heating, the temperature is preserved to the initial forging temperature, when the temperature is preserved to the initial forging temperature, the blank is discharged for forging, after oxide skin is removed, the blank is divided, a shoulder is pressed for 110mm long, a small foot is pinched to phi 245mm round, the blank with the small foot is pinched is fed into a blank feeding mold, the mold is upset, after the mold is ejected, the blank is returned to the furnace for heating, after oxide skin is removed from the blank feeding mold, the small foot is covered by a cover mold for preforming, the cover mold is controlled not to be eccentric, and then the small foot is stamped by the upper die forging mold, and finally the forging is completed.

2. The process of a tree forging according to claim 1, wherein: the height-diameter ratio of the blank is controlled to be 2.0-2.5.