CN112588857B

CN112588857B - Method for extruding small wires by large-scale reversing machine

Info

Publication number: CN112588857B
Application number: CN202011280158.0A
Authority: CN
Inventors: 宋卡迪; 聂青友; 沈守稳; 张超; 郎滨
Original assignee: Ningbo Changzhen Copper Co ltd
Current assignee: Ningbo Changzhen Copper Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-06-17
Anticipated expiration: 2040-11-16
Also published as: CN112588857A

Abstract

The invention provides a method for extruding small wires by a large-scale reverse machine, which aims to overcome the technical problems that an extruder in the prior art is limited by an extrusion ratio, so that the processing period for producing 1.0-4.0 small wires is longer, and the processing cost is higher, and comprises the following steps: a) adjusting the length L of a sizing band of the die, reducing resistance by a demoulding angle, and matching die demoulding with the diversion trench; b) heating the brass ingot to T according to the heating process; c) adjusting the extrusion speed according to the speed regulation process; d) and (4) matching the take-up parameter setting of the extruder with the speed of the take-up reel to be consistent. The method can break the extrusion ratio and solve the technical problem of extruding small wires with large tonnage.

Description

Method for extruding small wires by large-scale reversing machine

Technical Field

The invention relates to the technical field of metal processing, in particular to a method for extruding small wires by a large-scale reversing machine.

Background

China is the biggest country producing copper processing materials, the country of trade and the country of consumption in the world at present, the regeneration performance of copper is good, and brass is widely applied based on outstanding conductivity, wear resistance, corrosion resistance and cutting performance. The industries include refrigeration industry, automobile parts, valves, water heating industry, bathroom industry, instruments, electronic appliances, earphone plug-in machines, pen points, communication equipment and the like, wherein the production processes of earphones, pen point small wires and mobile phone parts are long, the cost is high, and the contradiction is increasingly prominent.

Chinese patent publication No. CN100393437C provides an apparatus for producing an extruded product using a single-groove continuous extruder, comprising: the oxide layer removing device for removing the oxide layers on the surfaces of the two copper rods is internally provided with an adjustable wheel brush mechanism which rotates at the speed of 300-600R/Min, the gap between the two copper rods and the wheel brush is adjustable, and the oxide layers on the welding surfaces of the two copper rods are brushed by depending on the tangency of the copper rods and the outer edge of the wheel brush; the anti-twist device is horizontally fixed at the front end of the extrusion wheel and is positioned on the same central axis with the extrusion wheel groove, the upper copper rod and the lower copper rod in the device respectively pass through corresponding guide dies and guide rollers, and the direction of the guide dies is adjusted and transposed once at an interval of 30-300 seconds; the double-hole outgoing line extrusion cavity, the double-hole die and the cavity cover are arranged for ensuring double-end outgoing lines, the double-hole die is connected to the rear of an orifice on the double-hole outgoing line extrusion cavity, two hole patterns are arranged between the double-hole die and the cavity cover, and the double-hole die is connected to the middle part of the cavity cover; the anti-bonding device is arranged for preventing bonding of the wires and has the functions of separating, guiding and drying two products.

The device improves the single-wheel groove extruder, has higher practical value, and its problem lies in that, present extruder receives the extrusion ratio restriction, and crowded xiao mian has certain limitation, leads to producing 1.0 ~ 4.0 xiao mian process flow cycle length, and the processing cost is high.

Disclosure of Invention

The invention provides a method for extruding small wires by a large-scale reversing machine, which can break the extrusion ratio and solve the technical problem of extruding small wires with large tonnage, and aims to overcome the technical problems that the processing period for producing 1.0-4.0 small wires is long and the processing cost is high due to the fact that an extruder is limited by the extrusion ratio in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions.

A method for extruding small wires by a large-scale reversing machine comprises the following steps:

a) adjusting the length L of a sizing belt of the die, reducing resistance by a demoulding angle, and matching the demoulding of the die with the diversion trench;

b) heating the temperature of the brass ingot to T according to the heating process;

c) adjusting the extrusion speed according to the speed regulation process;

d) and (4) matching the take-up parameter setting of the extruder with the speed of the take-up reel consistently.

Preferably, the length of the bearing in the step a is in the following range: l is more than or equal to 5mm and less than or equal to 7 mm.

Preferably, the heating process in the step b comprises preheating, heating, heat preservation, constant temperature homogenization and gradient heating.

Preferably, the value range of the brass ingot in the step b after the temperature is raised is as follows: t is more than or equal to 690 ℃ and less than or equal to 710 ℃.

Preferably, the speed regulation process in the step c comprises three regulation stages of slow speed, fast speed and slow speed.

Preferably, isothermal extrusion is performed after uniform temperature heating and gradient heating.

Preferably, the extrusion ratio is up to 1500.

The existing extruder is limited by an extrusion ratio, so that the processing period for producing 1.0-4.0 small wires is long, and the processing cost is high. The application provides a method for extruding small wires by a large-scale reverser, the extrusion ratio reaches 1500, the problem of phi 200 multiplied by 800 extruding double holes phi 4.0mm is solved, and the technical problem of extruding small wires by large tonnage is solved. Specifically, the step of extruding the small wires comprises the following steps: (1) heating the brass ingot, wherein the heating process sequentially comprises preheating → heating → heat preservation → constant temperature homogenization → gradient heating, and the value range of the temperature T of the brass ingot after the temperature is raised is that T is more than or equal to 690 ℃ and less than or equal to 710 ℃; (2) the length of the die sizing belt is well designed, the value range of the length L of the die sizing belt is that L is not less than 5mm and not more than 7mm, the resistance is reduced by the demoulding angle, and the demoulding of the die is matched with the diversion trench; (3) adjusting the extrusion speed according to the speed regulation process, wherein the extrusion speed is from extrusion start slow → fast → slow; (4) and (4) matching the take-up parameter setting of the extruder with the speed of the take-up reel consistently. After the extrusion by the method, two extension steps and two annealing steps are reduced, so that the production cost is effectively reduced; furthermore, the method can realize quick turnover, shorten the delivery period and improve the productivity; in addition, this application reducible small-tonnage extruder realizes crowded stick, crowded line two unification production.

In conclusion, the invention has the following beneficial effects: (1) after the extrusion by the method, two extension and two annealing processes can be reduced, so that the production cost is reduced; (2) the method can realize quick turnover, shorten the delivery period and improve the productivity; (3) the method can reduce a small-tonnage extruder and realize rod extrusion and wire extrusion two-in-one production; (4) under the condition that the quality performance is unchanged, the extrusion ratio of brass is broken, the problem of extruding small wires is solved, the productivity of the small wires is released, and the production cost can be effectively reduced.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The following examples are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and in order to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

c) adjusting the extrusion speed according to the speed regulation process;

The value range of the length of the die sizing belt in the step a is as follows: l is more than or equal to 5mm and less than or equal to 7 mm; the heating process in the step b comprises preheating, heating, heat preservation, constant temperature homogenization and gradient heating; in the step b, the value range of the brass ingot after the temperature is raised is as follows: t is more than or equal to 690 ℃ and less than or equal to 710 ℃; the speed regulation process in the step c comprises three regulation stages of slow speed, fast speed and slow speed; after the temperature is heated uniformly, the isothermal extrusion is needed to be carried out after the gradient heating; the extrusion ratio reached 1500.

The existing extruder is limited by an extrusion ratio, so that the processing period for producing 1.0-4.0 small wires is long, and the processing cost is high. The application provides a method for extruding small wires by a large-scale reverser, the extrusion ratio reaches 1500, the problem of phi 200 multiplied by 800 extruding double holes phi 4.0mm is solved, and the technical problem of extruding small wires by large tonnage is solved. Specifically, the step of extruding the small wires comprises the following steps: (1) heating the brass ingot, wherein the heating process sequentially comprises preheating → heating → heat preservation → constant temperature homogenization → gradient heating, and the value range of the temperature T of the brass ingot after the temperature is raised is that T is more than or equal to 690 ℃ and less than or equal to 710 ℃; (2) the length of the die sizing belt is well designed, the value range of the length L of the die sizing belt is that L is not less than 5mm and not more than 7mm, the resistance is reduced by the demoulding angle, and the demoulding of the die is matched with the diversion trench; (3) adjusting the extrusion speed according to the speed regulation process, wherein the extrusion speed is from extrusion start slow → fast → slow; (4) and (4) matching the take-up parameter setting of the extruder with the speed of the take-up reel consistently. After the extrusion by the method, two extension steps and two annealing steps are reduced, so that the production cost is effectively reduced; furthermore, the method can realize quick turnover, shorten the delivery period and improve the productivity; in addition, this application reducible small-tonnage extruder realizes crowded stick, crowded line two unification production. According to the method for extruding the small wires by the large-scale reversing machine, under the condition that the quality performance is not changed, the extrusion ratio of brass is broken, the problem of extruding the small wires is solved, the productivity of the small wires is released, and the production cost can be effectively reduced.

Claims

1. A method for extruding small wires by a large-scale reversing machine is characterized by comprising the following steps:

b) heating the temperature of the brass ingot to T according to a heating process, wherein the heating process comprises preheating, heating, heat preservation, constant-temperature homogenization and gradient heating; the value range of the brass ingot after temperature rise is as follows: t is more than or equal to 690 ℃ and less than or equal to 710 ℃;

c) adjusting the extrusion speed according to a speed adjusting process, wherein the speed adjusting process comprises three adjusting stages of slow speed, fast speed and slow speed;

2. The method for extruding the small wires by the large reversing machine according to claim 1, wherein the range of the length of the bearing belt of the die in the step a is as follows: l is more than or equal to 5mm and less than or equal to 7 mm.

3. The method for extruding the small wires by the large-scale reversing machine according to claim 1, wherein isothermal extrusion is required after uniform temperature heating and gradient heating.

4. A method of miniwire with a large reverse machine according to claim 1 or 2, characterized in that the extrusion ratio is 1500.