CN110523790A - 液压冷拔机扩径、制头自动定尺装置及方法 - Google Patents

液压冷拔机扩径、制头自动定尺装置及方法 Download PDF

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CN110523790A
CN110523790A CN201910842532.2A CN201910842532A CN110523790A CN 110523790 A CN110523790 A CN 110523790A CN 201910842532 A CN201910842532 A CN 201910842532A CN 110523790 A CN110523790 A CN 110523790A
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oil cylinder
pressure
pusher oil
displacement
expanding
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CN110523790B (zh
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王家聪
刘庆教
梁浩华
刘贤翠
韦金钰
翟新颖
汤宝石
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Xuzhou XCMG Hydraulics Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02Dies; Selection of material therefor; Cleaning thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C5/00Pointing; Push-pointing
    • B21C5/003Pointing; Push-pointing of hollow material, e.g. tube
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08Tube expanders
    • B21D39/20Tube expanders with mandrels, e.g. expandable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Metal Extraction Processes (AREA)

Abstract

本发明公布一种液压冷拔机扩径、制头自动定尺装置及方法,属于管技术领域。步骤一,将坯管安装在冷拔机上;步骤二,启动推料油缸,推料油缸经推梁推动坯管沿模具运动;步骤三,位移传感器实时监测推料油缸的位移,压力传感器实时监测推料油缸的压力;步骤四,压力传感器最先检测到的突然急剧增大的压力作为压力信号拾取点;步骤五,位移传感器在压力信号拾取点处检测的位移作为测距起点,推料油缸从测距起点运动到设定值时,推料油缸停止前进,冷拔结束。本发明通过在推料油缸中连接位移传感器、压力传感器,结合坯管完全进入模具后,推料油缸压力趋于稳定的特性,在坯管拉拔起点处作为拾取压力传感信号加以区分,控制推料油缸行程实现定尺。

Description

液压冷拔机扩径、制头自动定尺装置及方法
技术领域
本发明涉及冷拔机拔管技术领域,具体是一种液压冷拔机扩径、制头自动定尺装置及方法。
背景技术
在液压冷拔机动作功能中,扩径(涨管)、自动制头(拔头)是目前液压冷拔机拔管过程中必备功能。涨管是指将钢管管径通过内模进行扩大,因此也称扩径。制头是指将需冷拔的钢管通过外力(推料油缸)将其推入外模,并通过外模给拉拔小车一定尺寸的夹持长度,因此也称拔头。
传统的液压冷拔机在扩径(涨管)、制头(拔头)过程中均用目测或计量工具通过人工测定。在操作和生产效率上存在一定的安全隐患和不足。手动操控扩径(涨管)、制头(拔头)容易使管头超出所需尺寸范围,不易复位,浪費材料。
发明内容
为解决上述技术问题,本发明提供一种液压冷拔机扩径、制头自动定尺装置及方法。
本发明通过以下技术方案实现:一种液压冷拔机扩径、制头自动定尺装置,包括内模、外模,内模连接有芯杆,芯杆上套装有推梁;所述推梁连接有推料油缸;所述推料油缸的进油口联接有压力传感器,推料油缸上还安装有用于检测推力油缸形成的位移传感器。
优选的:所述推料油缸连接有液压供油系统,液压供油系统连接有控制器,所述压力传感器、位移传感器将信号传输至控制器。
一种液压冷拔机扩径、制头自动定尺装置方法,
步骤一,将坯管安装在冷拔机上;
步骤二,启动推料油缸,推料油缸经推梁推动坯管沿模具运动;
步骤三,位移传感器实时监测推料油缸的位移,压力传感器实时监测推料油缸的压力;
步骤四,压力传感器最先检测到的突然急剧增大的压力作为压力信号拾取点;
步骤五,位移传感器在压力信号拾取点处检测的位移作为测距起点,推料油缸从测距起点运动到设定值时,推料油缸停止前进,冷拔结束。
优选的:所述冷拔机包括内模、外模,内模通过内模并帽连接有芯杆,芯杆上套装有推梁。
优选的:所述推料油缸连接有液压供油系统,控制器控制液压供油系统;所述压力传感器、位移传感器将信号传输至控制器。
优选的:所述控制器以位移传感器检测的位移为x轴,以压力传感器检测的压力为y轴绘制曲线图;将曲线图上突然急剧增加的压力点作为压力信号拾取点,压力信号拾取点对应的位移作为测距起点;从测距起点开始,曲线图沿y轴位移到达设定值时,控制器控制推料油缸停止前进,冷拔结束。
与现有技术相比,本发明的有益效果是:通过在推料油缸中连接位移传感器、压力传感器,结合坯管完全进入模具后,推料油缸压力趋于稳定的特性,在坯管拉拔起点处作为拾取压力传感信号加以区分,控制推料油缸行程实现定尺;本发明结构紧凑、合理,不改变原有推料油缸外形与特征,成本低,安装操作方便,且安全高效,控制精度高,不易失控。
附图说明
图1是本发明实施例一扩径时结构示意图;
图2是本发明实施例一制头时结构示意图;
图3是本发明实施例二中曲线图。
具体实施方式
以下是本发明的具体实施例,现结合附图对本发明做进一步说明。
实施例一
结合图1和图2所示,一种液压冷拔机扩径、制头自动定尺装置,包括内模1、外模2,内模1通过内模并帽5连接芯杆3,芯杆3上套装推梁4;推梁4连接推料油缸,推料油缸连接有液压供油系统。
本实施例改进之处在于:
推料油缸的进油口联接压力传感器,在工作时,压力传感器实时监测推料油缸的无杆腔压力。推料油缸的活塞杆上安装位移传感器,在工作时,位移传感器用于实时监测推料油缸活塞杆的位移。
液压供油系统连接有控制器,在工作时,压力传感器、位移传感器将信号传输至控制器,控制器根据信号来控制推料油缸的伸缩、启停。
实施例二
在上述实施例一的基础上,再结合图3所示,一种液压冷拔机扩径、制头自动定尺装置方法,
步骤一,将坯管6安装在冷拔机上;
步骤二,启动推料油缸,推料油缸经推梁4推动坯管6沿模具(内模1,或者内模1和外模2)运动;
步骤三,位移传感器实时监测推料油缸的位移,压力传感器实时监测推料油缸的压力;控制器以位移传感器检测的位移为x轴,以压力传感器检测的压力为y轴绘制曲线图,如图3所示;
步骤四,压力传感器最先检测到的突然急剧增加的压力作为压力信号拾取点;对应于曲线图,也就是线上最先开始急剧增大的压力点作为压力信号拾取点,压力信号拾取点对应的位移作为测距起点;
步骤五,位移传感器在压力信号拾取点处检测的位移作为测距起点,推料油缸从测距起点运动到设定值时,控制器控制推料油缸停止前进,冷拔结束。
本发明通过在推料油缸中连接位移传感器、压力传感器,结合坯管完全进入模具后,推料油缸压力趋于稳定的特性,在坯管拉拔起点处作为拾取压力传感信号加以区分,控制推料油缸行程实现定尺。
本发明结构紧凑、合理,不改变原有推料油缸外形与特征,成本低,安装操作方便,且安全高效,控制精度高,不易失控。设定值可根据需要进行设置,减少了人工测定误差,保障安全生产,提高生产效率。

Claims (6)

1.一种液压冷拔机扩径、制头自动定尺装置,包括内模、外模,内模连接有芯杆,芯杆上套装有推梁;所述推梁连接有推料油缸;
其特征在于:
所述推料油缸的进油口联接有压力传感器,推料油缸上还安装有用于检测推力油缸形成的位移传感器。
2.根据权利要求1所述的液压冷拔机扩径、制头自动定尺装置,其特征在于:所述推料油缸连接有液压供油系统,液压供油系统连接有控制器,所述压力传感器、位移传感器将信号传输至控制器。
3.一种液压冷拔机扩径、制头自动定尺装置方法,其特征在于:
步骤一,将坯管安装在冷拔机上;
步骤二,启动推料油缸,推料油缸经推梁推动坯管沿模具运动;
步骤三,位移传感器实时监测推料油缸的位移,压力传感器实时监测推料油缸的压力;
步骤四,压力传感器最先检测到的突然急剧增大的压力作为压力信号拾取点;
步骤五,位移传感器在压力信号拾取点处检测的位移作为测距起点,推料油缸从测距起点运动到设定值时,推料油缸停止前进,冷拔结束。
4.根据权利要求3所述的液压冷拔机扩径、制头自动定尺装置方法,其特征在于:所述冷拔机包括内模、外模,内模通过内模并帽连接有芯杆,芯杆上套装有推梁。
5.根据权利要求3所述的液压冷拔机扩径、制头自动定尺装置方法,其特征在于:所述推料油缸连接有液压供油系统,控制器控制液压供油系统;所述压力传感器、位移传感器将信号传输至控制器。
6.根据权利要求5所述的液压冷拔机扩径、制头自动定尺装置方法,其特征在于:所述控制器以位移传感器检测的位移为x轴,以压力传感器检测的压力为y轴绘制曲线图;将曲线图上突然急剧增加的压力点作为压力信号拾取点,压力信号拾取点对应的位移作为测距起点;从测距起点开始,曲线图沿y轴位移到达设定值时,控制器控制推料油缸停止前进,冷拔结束。
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JPS54130462A (en) * 1978-03-31 1979-10-09 Sumitomo Metal Ind Ltd Cold drawing method for steel pipe with fin of irregular shape
US20110048089A1 (en) * 2009-08-28 2011-03-03 Sanwa Kokan Co., Ltd Steel pipe drawing apparatus and drawn steel pipe manufacturing method
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CN202045287U (zh) * 2011-05-06 2011-11-23 金川集团有限公司 一种推管式管材扩径拉拔制头装置
CN104634665A (zh) * 2014-09-12 2015-05-20 北京航空航天大学 一种管材充液胀形试验方法及装置
CN205167651U (zh) * 2015-12-04 2016-04-20 天水锻压机床(集团)有限公司 钢管智能扩径控制系统
CN108346365A (zh) * 2018-01-11 2018-07-31 青岛本末岩控技术有限公司 可改变锚杆支护参数的锚杆锚固拉拔试验教学模型

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130462A (en) * 1978-03-31 1979-10-09 Sumitomo Metal Ind Ltd Cold drawing method for steel pipe with fin of irregular shape
US20110048089A1 (en) * 2009-08-28 2011-03-03 Sanwa Kokan Co., Ltd Steel pipe drawing apparatus and drawn steel pipe manufacturing method
CN102000709A (zh) * 2010-10-27 2011-04-06 常州市腾田液压机械有限公司 一种冷拔钢管的液压油冷的方法及实现冷拔钢管的液压油冷方法的冷拔钢管成型机
CN202045287U (zh) * 2011-05-06 2011-11-23 金川集团有限公司 一种推管式管材扩径拉拔制头装置
CN104634665A (zh) * 2014-09-12 2015-05-20 北京航空航天大学 一种管材充液胀形试验方法及装置
CN205167651U (zh) * 2015-12-04 2016-04-20 天水锻压机床(集团)有限公司 钢管智能扩径控制系统
CN108346365A (zh) * 2018-01-11 2018-07-31 青岛本末岩控技术有限公司 可改变锚杆支护参数的锚杆锚固拉拔试验教学模型

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