WO2018133626A1 - 一种金属毛细管内表面磁力研磨抛光方法及装置 - Google Patents

一种金属毛细管内表面磁力研磨抛光方法及装置 Download PDF

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WO2018133626A1
WO2018133626A1 PCT/CN2017/118194 CN2017118194W WO2018133626A1 WO 2018133626 A1 WO2018133626 A1 WO 2018133626A1 CN 2017118194 W CN2017118194 W CN 2017118194W WO 2018133626 A1 WO2018133626 A1 WO 2018133626A1
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magnetic
grinding
metal capillary
polishing
liquid
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PCT/CN2017/118194
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English (en)
French (fr)
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刘中群
刘长军
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深圳中科康森瑞特科技发展有限公司
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Publication of WO2018133626A1 publication Critical patent/WO2018133626A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/112—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces

Definitions

  • the invention relates to a method for polishing the inner wall of a metal capillary, in particular to a method and a device for magnetic grinding and polishing of the inner surface of a metal capillary.
  • a capillary tube generally refers to a thin tube having an inner diameter of 1 mm or less, which is called a capillary tube because of its fineness as a tube.
  • a metal capillary refers to a capillary made of a metal material, and generally refers to a metal tube having an inner diameter smaller than ⁇ 1. It can now be seen in medicine and on construction materials. When the capillary is inserted into the liquid, the liquid surface is sucked up, that is, the liquid level in the tube is higher than the liquid level outside the tube.
  • metal capillaries are basically manufactured by cold drawing, and the manufacturing precision depends on factors such as manufacturing equipment and processes.
  • the inner wall may wrinkle and the appearance of scale, which causes the inner wall of the pipe to be uneven and the inner wall roughness level is poor.
  • the medical and other industries require a level of Ra ⁇ 0.15 ⁇ m or higher for the inner wall of the metal capillary, it is necessary to polish the metal capillary inner wall used in the industry to make the inner wall roughness level reach the mirror level. Due to the very small inner diameter of the capillary, the conventional physical polishing in China cannot be carried out in such a small space.
  • the common polishing method is electrochemical polishing, but the polishing quality level Ra is about 0.4 ⁇ m, which cannot meet the needs of automation equipment in the pharmaceutical industry. Requires, and destroys the structure of the inner wall of the capillary.
  • the object of the present invention is to solve the problem that the inner surface polishing of the metal capillary does not meet the requirements of the medical industry, and provides a magnetic capillary polishing method and device for the inner surface of the metal capillary.
  • the present invention adopts the following technical solutions:
  • a magnetic capillary grinding and polishing method for a metal capillary inner surface includes the following steps:
  • the magnetic grinding suspension comprises hard magnetic particles and a liquid.
  • the magnetic grinding suspension comprises hard magnetic particles, non-magnetic particles having a smaller particle diameter than the hard magnetic particles, and a liquid.
  • the magnetic suspension comprises 50-10000 mesh iron powder or iron-containing alloy powder, 0.5-5 micron diamond and liquid, and the liquid is an aqueous liquid or an oily liquid.
  • the ratio of the iron powder to the diamond is not less than 1:1.
  • the metal capillary to be ground is one or more simultaneously ground.
  • the transport of the magnetic grinding suspension to the metal capillary to be ground as described in S3 is one-way delivery or two-way delivery.
  • a metal capillary inner surface magnetic grinding and polishing apparatus for realizing any of the methods of claims 1-7.
  • an electromagnet or permanent magnet that produces a parallel magnetic field is included.
  • the permanent magnets are two pieces and are respectively placed at the N-S or S-N magnetic poles, and the two permanent magnets respectively attract the magnetic poles to form a magnetic circuit.
  • the beneficial effect of the present invention is that by transporting the magnetic grinding suspension into the metal capillary to be ground, the magnetic particles in the grinding suspension under the action of the magnetic field force will accumulate on one side of the inner wall of the metal capillary due to the magnetic property. After the particles are accumulated inside the metal capillary, they will be subjected to both the fluid thrust and the magnetic force of the magnetic field relative to 360° rotation. The magnetic particles are rubbed on the inner surface of the metal capillary to achieve polishing of the inner surface, which can meet the requirements of the medical industry.
  • FIG. 1 is a schematic view of a magnetic capillary grinding and polishing apparatus for a metal capillary inner surface according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the installation of a high-pressure hose and a metal capillary tube according to an embodiment of the present invention.
  • FIG 3 is a structural view of a pipe end lock hoop according to an embodiment of the present invention.
  • 1-electromagnet mounting base 2-bearing, 3-electromagnet mounting bracket, 4-belt, 5-electromagnet rotating motor, 6-control panel bracket, 7-control panel, 8-metal capillary to be ground , 9-metal capillary mounting frame, 10-electromagnet, 11-high pressure hose, 12-hydraulic pump, 13-liquid bottle, 14-magnetic grinding suspension, 15-sheath, 16-tube end lock, 17- Locking block one, 18 locking block two, 19-locking screw.
  • the magnetic capillary grinding and polishing method for the inner surface of the metal capillary provided by the invention comprises the following steps:
  • the outer diameter of the high-pressure hose inserted into the metal capillary select the appropriate size of the sheath (the inner diameter of the sheath should be smaller than the outer diameter of the high-pressure hose), and install the sheath on the high-pressure hose and the metal capillary.
  • the length of the sheath installation must be greater than or equal to the length of the metal capillary and the high pressure hose plug joint.
  • a 200-mesh iron powder was added to a diamond suspension of W0.5 at a ratio of 1 mg/ml to carry out a magnetic grinding suspension configuration, and after being shaken, it was placed in a liquid bottle.
  • the inner surface of the metal capillary can be polished and polished by grinding and polishing the metal capillary for 10 to 36 hours according to the roughness of the inner surface before the metal capillary polishing.
  • the prepared grinding suspension is placed in a grinding suspension storage tank, and the metal capillary tube is fixedly placed in a 360-degree rotating variable magnetic field, and the metal capillary tube may be one or more; the grinding is performed by a bidirectional variable hydraulic pump.
  • the suspension is transported into the system fluid path.
  • the magnetic particles in the grinding suspension will accumulate on one side of the inner wall of the metal capillary, due to the accumulation of magnetic particles inside the metal capillary. After that, it will be subjected to the fluid thrust from the bidirectional variable hydraulic pump output and the magnetic force from the 360-degree rotating variable magnetic field.
  • the size of the magnetic parameter can be By controlling the current parameters of the electromagnetic field of the 360-degree rotating variable, the size parameter of the liquid thrust can be controlled by the direction and magnitude of the displacement parameter and the direction selection parameter of the bidirectional variable variable hydraulic pump, and the corresponding parameters of the magnetic force and the liquid thrust are adopted. Control to achieve friction control, in friction parameters Under certain circumstances, different grinding effects can be achieved by adjusting different grinding times. Since the direction of the variable electromagnetic field can be rotated 360 degrees, different angles and full angles of the inner wall of the metal capillary can be ground by adjusting the rotation angle of the electromagnetic field. The sample comparison method can be used to judge the grinding result during the grinding process, and the grinding is finished.
  • a one-way hydraulic pump can be employed.
  • the magnetic field is stationary and the metal capillary to be ground is rotated 360°.
  • the magnetic abrasive suspension may comprise only hard magnetic particles and liquids.
  • Hard magnetic particles, non-magnetic particles having a smaller particle diameter than hard magnetic particles, and a liquid may also be included. If only hard magnetic particles need to control the size of the external magnetic field, the magnetic force is prevented from being excessively large; the addition of non-magnetic particles having a small particle size can make the friction more sufficient.
  • the magnetic suspension comprises 50 mesh iron powder, 5 micron diamond, and liquid, the liquid being an aqueous liquid or an oily liquid.
  • the ratio of iron powder to diamond is 1:1.
  • the magnetic suspension comprises 10,000 mesh iron powder, 0.5 micron diamond, and liquid, the liquid being an aqueous liquid or an oily liquid.
  • the ratio of iron powder to diamond is 2:1.
  • the magnetic particles in the magnetic suspension are selected from iron-containing alloy powders such as ferric oxide powder.
  • a metal capillary inner surface magnetic grinding and polishing device includes
  • the working area in the middle of the electromagnet is preferably square, which makes the magnetic field more uniform.
  • the magnetic size of the electromagnet is adjustable.
  • a permanent magnet can be used in place of the electromagnet.
  • the permanent magnets are two pieces and are respectively placed at the N-S or S-N magnetic poles, and the two permanent magnets are respectively attracted to the magnetic pole faces to form a magnetic circuit.

Abstract

一种金属毛细管内表面磁力研磨抛光方法及装置，该方法包括如下步骤：将待研磨的金属毛细管（8）固定在金属毛细管安装架（9）上；配置磁性研磨悬浮液（14）；将该磁性研磨悬浮液（14）输送到待研磨的金属毛细管（8）中，并在可相对旋转360°的磁场力的作用下开始研磨；采用样品对比法判断研磨结果，结束研磨。该装置包括电磁铁安装基座（1）、轴承（2）、电磁铁安装架（3）、传动带（4）、电磁铁旋转电机（5）、控制面板支架（6）、控制面板（7）、待研磨的金属毛细管（8）、金属毛细管安装架（9）、电磁铁（10）或永久磁铁、高压软管（11）、液压泵（12）、液体瓶（13）、磁性研磨悬浮液（14）。磁性研磨悬浮液（14）在磁力和液体推力的作用下对金属毛细管（8）内表面进行高精密的研磨抛光。

Description

一种金属毛细管内表面磁力研磨抛光方法及装置 【技术领域】
本发明涉及一种金属毛细管内壁的抛光方法，尤其涉及一种金属毛细管内表面磁力研磨抛光方法及装置。
【背景技术】
毛细管通常指的是内径等于或小于1毫米的细管，因管径有的细如毛发故称毛细管。金属毛细管是指用金属材质制造的毛细管，通常指内径小于Φ1的金属管。目前可以在医学上，建筑材料上都能看得到。毛细管插入液体中，会产生液面倒吸现象，即管子内液面高于管外液面。
一般金属毛细管基本都采用冷拔拉伸的方式制造，制造精度取决于制造的设备、工艺等因素有关。金属毛细管在制作过程中，内壁会发生褶皱并有氧化皮的出现，造成管材内壁不平整，内壁粗糙度水平较差。由于医学等行业对金属毛细管的内壁要求Ra≤0.15μm甚至更高的水平，因此需要对该类行业上使用的金属毛细内壁进行抛光处理使其内壁粗糙度水平达镜面水平。由于毛细管内径尺寸非常长小，目前国内常规的物理抛光无法在如此狭小的空间内进行，常见的抛光方法为电化学抛光，但抛光质量水平Ra在0.4μm左右无法满足医药行业上自动化设备的使用要求，且破坏毛细管内壁的结构。
【发明内容】
本发明的目的是解决金属毛细管内表面抛光达不到医学行业要求的问题，提供了一种金属毛细管内表面磁力研磨抛光方法及其装置。
为解决上述技术问题，本发明采用以下技术方案：
一种金属毛细管内表面磁力研磨抛光方法，包括如下步骤：
S1：将待研磨的金属毛细管固定在磁场中；
S2：配置磁性研磨悬浮液；
S3：将所述磁性研磨悬浮液输送到所述待研磨的金属毛细管中，并在磁场的磁场力和液体推力的作用下开始研磨，所述磁场力和所述待研磨的金属毛细管具有相对的360°的旋转。
优选地，所述磁性研磨悬浮液包括硬质磁性粒子和液体。
优选地，所述磁性研磨悬浮液包括硬质磁性粒子、粒径小于硬质磁性粒子的非磁性粒子和液体。
优选地，所述磁性悬浮液包括50-10000目的铁粉或含铁的合金粉、0.5-5微米的金刚石和液体，所述液体是水性液体或油性液体。
优选地，所述铁粉与金刚石的比例不小于1:1。
优选地，待研磨的金属毛细管是一根或多根同时研磨。
优选地，S3中所述将所述磁性研磨悬浮液输送到所述待研磨的金属毛细管是单向输送或双向输送。
一种实现权利要求1-7所述的任一方法的金属毛细管内表面磁力研磨抛光装置。
优选地，包括产生平行磁场的电磁铁或永久磁铁。
优选地，所述永久磁铁是两块并分别以N-S或S-N磁极端安放，两块永久磁铁分别相对磁极端面相吸形成磁回路。
本发明的有益效果为通过将所述磁性研磨悬浮液输送到所述待研磨的金属毛细管中，在磁场力的作用下研磨悬浮液中的磁性颗粒将堆积在金属毛细管内壁的一侧，由于磁性颗粒在金属毛细管内部堆积后将同时受到流体推力及相对360°旋转的磁场的磁力的作用，磁性颗粒在金属毛细管内表面进行摩擦，实现对内表面的抛光，可以达到医学行业的要求。
【附图说明】
图1是本发明实施例的金属毛细管内表面磁力研磨抛光装置示意图。
图2是本发明实施例的高压软管与金属毛细管插接安装示意图。
图3是本发明实施例的管端锁箍结构图。
其中，1-电磁铁安装基座、2-轴承、3-电磁铁安装架、4-传动带、5-电磁铁旋转电机、6-控制面板支架、7-控制面板、8-待研磨的金属毛细管、9-金属毛细管安装架、10-电磁铁、11-高压软管、12-液压泵、13-液体瓶、14-磁性研磨悬浮液，15-护套，16-管端锁箍，17-锁紧块一，18锁紧块二，19-锁紧螺杆。
【具体实施方式】
实施例1
本发明提供的一种金属毛细管内表面磁力研磨抛光方法包括以下步骤：
(1)根据金属毛细管两端的外径尺寸选取合适尺寸的高压软管(高压软管内径尺寸需比金属毛细管外径尺寸小)插入金属毛细管两端，插入长度5mm以上。
(2)根据插接金属毛细管的高压软管的外径尺寸选取合适尺寸的护套(护套内径需比高压软管的外径尺寸小)，将护套安装在高压软管与金属毛细管的插接结合处，护套安装长度需大于等于金属毛细管与高压软管插接结合处长度。
(3)根据插接处毛细管外径、高压软管厚度及护套厚度选取合适尺寸的端部插接锁箍(端部插接锁箍内径＝毛细管外径+高压软管厚度*2*0.7+护套厚度*2*0.7)并将端部插接锁箍所致端部插接部位进行紧固,高压软管与金属毛细管插接安装图见图1及图2。
(4)将与高压软管插接装配好的金属毛细管固定在金属毛细管安装架上(设计上金属毛细管安装架与电磁铁垂直方向平行),该步骤安装图见图3。
(5)将200目的铁粉以1mg/ml的比例加入W0.5的金刚石悬浮液中进行磁性研磨悬浮液配置，在使用摇匀后装入液体瓶内。
(6)开启控制面板上的液压泵动力电机电源开关，在压力泵输出压力为7MPa条件下通过控制面板上的液压泵动力电机转速调节旋钮(500～1800转/分钟可调以使流量在4000ml/分钟至14400ml/分钟可调)调节转速至500转/分钟并运行1分钟左右检查金属毛细管两端高压软管插接结合处无液体漏出，再调节液压泵动力电机转速至1800转/分钟并运行一分钟左右检查金属毛细管两端高压软管插接结合处无液体漏出，在确保液路连接密闭性良好后将液压泵动力电机转速调制1000转/分钟左右。
(7)开启控制面板上的电磁铁电流调节旋钮(0-10A可调，用以调节电磁铁磁场强度)至10A并运行1分钟左右检查检查金属毛细管两端高压软管插接结合处无液体漏出且管路内液体流通顺畅后将电磁铁电流调节至6A左右。
(8)开启控制面板上的电磁铁旋转电机速度调节旋钮(0-1200rpm)调节电磁铁旋转速度至600转/分。
(9)在上述参数设定条件下根据金属毛细管抛光前内表面粗糙情况不同对金属毛细管研磨抛光10～36小时即可完成金属毛细管内表面的研磨抛光。
(10)上述参数设定条件下对一SUS316L内径为0.7mm的医用不锈钢毛细管进行18小时研磨抛光后将金属毛细管进行检测内壁粗糙度Ra＝0.003μm，符合医学行业需求。
实施例2
本发明将配制好的研磨悬浮液置于研磨悬浮液存储罐中，将金属毛细管固定放置 于360度旋转变量磁场中，金属毛细管可以是一根也可以是多根；通过双向变量液压泵将研磨悬浮液输送至系统液路中，当研磨悬浮液流经金属毛细管时由于受到磁场力的作用，研磨悬浮液中的磁性颗粒将堆积在金属毛细管内壁的一侧，由于磁性颗粒在金属毛细管内部堆积后将同时受到来自双向变量液压泵输出的流体推力及来自360度旋转变量磁场的磁力的作用，在两个力的共同作用下产生磁性颗粒对金属毛细管内壁的摩擦力，磁力的参数的大小可通过对360度旋转变量电磁场的电流参数进行控制，液体推力的大小参数可通过对双向可变量液压泵的排量参数及方向选择参数进行方向及大小的控制，通过对磁力及液体推力对应参数的控制从而实现对摩擦力的控制，在摩擦力参数一定的情况下通过调整不同的研磨时间从而可实现不同的研磨效果。由于变量电磁场的方向为可以360度旋转，因此可通过调整电磁场的旋转角度实现对金属毛细管内壁的不同角度及全角度的研磨。研磨过程中可采用样品对比法判断研磨结果，结束研磨。
在另一实施例中，可以采用单向液压泵。
在另一实施例中，磁场是固定不动的，待研磨的金属毛细管旋转360°。
实施例3
磁性研磨悬浮液的配置：
磁性研磨悬浮液可以只包括硬质磁性粒子和液体。也可以包括硬质磁性粒子、粒径小于硬质磁性粒子的非磁性粒子和液体。如果只有硬质磁性粒子需要控制外界磁场大小，防止磁力过大；加入粒径小的非磁性粒子可以使摩擦更充分。
在一种实施例中，磁性悬浮液包括50目的铁粉、5微米的金刚石和液体，所述液体是水性液体或油性液体。其中，铁粉与金刚石的比例为1:1。
在另一种实施例中，磁性悬浮液包括10000目的铁粉、0.5微米的金刚石和液体，所述液体是水性液体或油性液体。其中，铁粉与金刚石的比例为2:1。
在另一种实施例中，磁性悬浮液中的磁性粒子选用含铁的合金粉，比如三氧化二铁粉。
实施例4
如图1所示，一种金属毛细管内表面磁力研磨抛光装置，包括
电磁铁安装基座1、轴承2、电磁铁安装架3、传动带4、电磁铁旋转电机5、控制面板支架6、控制面板7、待研磨的金属毛细管8、金属毛细管安装架9、电磁铁10、 高压软管11、液压泵12、液体瓶13、磁性研磨悬浮液14。电磁铁中间的工作区优选的为正方形，可以使磁场更均匀。电磁铁的磁性大小是可以调节的。
在一种实施例中，可以用永久磁铁代替电磁铁。
永久磁铁是两块并分别以N-S或S-N磁极端安放，两块永久磁铁分别相对磁极端面相吸形成磁回路。
以上内容是结合具体/优选的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，其还可以对这些已描述的实施方式做出若干替代或变型，而这些替代或变型方式都应当视为属于本发明的保护范围。比如其他配置磁性悬浮液的方法，产生平行磁场的方法都应视为本发明的保护范围。

Claims (10)

  1. 一种金属毛细管内表面磁力研磨抛光方法，其特征在于，包括如下步骤：
    S1：将待研磨的金属毛细管固定在磁场中；
    S2：配置磁性研磨悬浮液；
    S3：将所述磁性研磨悬浮液输送到所述待研磨的金属毛细管中，并在磁场的磁场力和液体推力的作用下开始研磨，所述磁场和所述待研磨的金属毛细管具有相对的360°的旋转。
  2. 根据权利要求1所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，所述磁性研磨悬浮液包括硬质磁性粒子和液体。
  3. 根据权利要求1所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，所述磁性研磨悬浮液包括硬质磁性粒子、粒径小于硬质磁性粒子的非磁性粒子和液体。
  4. 根据权利要求1所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，所述磁性悬浮液包括50-10000目的铁粉或含铁的合金粉、0.5-5微米的金刚石和液体，所述液体是水性液体或油性液体。
  5. 根据权利要求4所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，所述铁粉与金刚石的比例不小于1:1。
  6. 如权利要求1所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，待研磨的金属毛细管是一根或多根同时研磨。
  7. 如权利要求1所述的金属毛细管内表面磁力研磨抛光方法，其特征在于，S3中所述将所述磁性研磨悬浮液输送到所述待研磨的金属毛细管是单向输送或双向输送。
  8. 一种实现权利要求1-7所述的任一方法的金属毛细管内表面磁力研磨抛光装置。
  9. 如权利要求8所述的金属毛细管内表面磁力研磨抛光装置，其特征在于，包括产生平行磁场的电磁铁或永久磁铁。
  10. 如权利要求8或9任一所述的金属毛细管内表面磁力研磨抛光装置，其特征在于，所述永久磁铁是两块并分别以N-S或S-N磁极端安放，两块永久磁铁分别相对磁极端面相吸形成磁回路。
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