A glass tube drawing machine, which comprises a frame, a frame arranged at the upper end of the vertical channel with a heater and a material guide bracket; setting at least one pulley in the material guide bracket; a guide rope winding roller is arranged on the machine frame, guide pulley sliding around the strength of the outer end is provided with a glass. Tube clamp; set up a pair of pull roller in the middle of the frame, the pull roller has a heat resistant rubber jacket; the center line of the vertical channel glass tube clamping device, the heater and the pull roller spacing center in a vertical line; which is characterized in that the motor speed reducer motor control circuit with the first end the speed adjusting gear are respectively connected to the end of the first positive and negative input terminal of amplifier on the second gear speed regulation in the first end is connected with the output end of the amplification circuit; the positive and negative control side respectively with the positive and negative voltage On the other side are connected through a stepless speed regulating end and an adjustable resistor connected to the GND terminal, the movable contact of the adjustable resistor is connected to the first output terminal of the amplifying circuit; the first amplifying circuit through the two stage operational amplifier, is connected with the output end of a sawtooth wave signal generator after the joint is connected with a zero negative input terminal, the zero output end of the comparator and a base control transistor is connected to the collector of the triode control; and the gear motor reverse conduction control circuit are connected through a triode tube inverting function and the gear motor forward conduction control circuit is connected to the drive.
【技术实现步骤摘要】
本技术涉及一种玻璃拔管机,特别是涉及一种将粗管拉成细管的拔管机。
技术介绍
现有的普通玻璃拔管机是从熔化玻璃液中直接拉制玻璃管,还有一种利用较粗玻璃管加工较细玻璃管。前一种方式,容易造成产品质量不稳,特别是对于产品尺寸需要经常变化,而且需求量又较小的用户,尤其是加工毛细玻璃管,此种拔管机就显得无能为力。后一种方式虽然能够解决前一种方式存在的不足,但是存在着驱动玻璃管下移的减速电机,在精确、平稳和无级变速控制方面的问题,使得拔出的毛细管管径均匀性仍然不十分理想。
技术实现思路
本技术所述的一种玻璃拔管机可以解决减速电机精确、平稳和无级调速控制的问题,以使玻璃拔管机生产的产品质量稳定可靠。本技术所述的一种玻璃拔管机包括机架、机架上端设置的具有垂直通道的加热器及一个导料支架;在导料支架上设置至少一个滑轮在机架上设置一个引导索缠绕辊,引导索可滑动地绕过所述的滑轮,其外端设有一个玻璃管夹紧器;在机架的中部设置一对拉料辊,在拉料辊上套有耐热胶外套;玻璃管夹紧器、加热器的垂直通道的中心线与拉料辊间距中心处在一条垂直线上;其特征在于减速电机控制电路的电机测速端与第一挡快慢调节端分别连接在第一个放大电路的正负输入端上,第二挡快慢调节端接在第一个放大电路的输出端上;正、反转控制端一侧分别与正、负电压端相连接,另一侧通过无级调速端和一个可调电阻串接至GND端,所述可调电阻的活动触点接在所述第一个放大电路的输出端上;所述第一个放大电路通过二级运放后,与一个锯齿波信号发生器的输出端相连接后,共同与一个过零比较器的负输入端相连接,该过零比较器输出端与一个控制三极管的基极相连接;该控制三 ...
【技术保护点】
【技术特征摘要】
【专利技术属性】
技术研发人员:左铁军,刘宝生,杨鲁义,
申请(专利权)人:北京科鸿阳经济技术发展公司,
类型:实用新型
国别省市:
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