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自攻螺丝钉螺纹加工的工艺介绍

文章出处:人气:0发表时间:2017-11-04【 返回列表

自攻螺丝钉螺纹加工的工艺介绍如下:

 

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  1、自攻螺丝钉螺纹切削Self-tapping screws thread cutting

 

  一般指用成形刀具或磨具在工件上加工螺纹的方法,主要有车削、铣削、攻丝套丝磨削、研磨和旋风切削等。车削、铣削和磨削螺纹时,工件每转一转,机床的传动链保证车刀、铣刀或砂轮沿工件轴向准确而均匀地移动一个导程。Generally refers to the use of forming tools or grinding tools in the processing of the thread on the workpiece, the main turning, milling, tapping sets wire grinding, grinding and cyclone cutting. Turning, milling and grinding threads, the workpiece per revolution, the machine's drive chain to ensure that the tool, cutter or wheel along the workpiece axis accurately and evenly move a lead.

 

  在攻丝或套丝时,刀具(丝锥或板牙)与工件作相对旋转运动,并由先形成的自攻螺丝螺纹沟槽引导着刀具(或工件)作轴向移动。In tapping or threading, the tool (tap or die) relative rotation of the workpiece, and by the formation of the self-tapping screw thread groove guide the tool (or workpiece) for axial movement.

 

  2、自攻螺丝钉螺纹车削Self tapping screw thread turning

 

在车床上车削螺纹可采用成形车刀或螺纹梳刀(见螺纹加工工具)。用成形车刀车削螺纹,由于刀具结构简单,是单件和小批生产自攻螺丝螺纹工件的常用方法;用螺纹梳刀车削螺纹,生产效率高,但刀具结构复杂,只适于中、大批量生产中车削细牙的短螺纹工件。Turning lathes can be formed by turning or thread combing knife (see thread processing tools). With forming turning lathe thread, the simple structure of the tool, is a single and small batch production of self-tapping screw thread workpiece common method; thread comb cutter thread, high production efficiency, but the tool structure is complicated, only suitable for medium and large Short-thread workpieces for turning fine teeth in mass production.

 

  普通车床车削梯形螺纹的螺距精度一般只能达到8~9级(JB2886-81,下同);在专门化的螺纹车床上加工螺纹,生产率或精度可显著提高。Ordinary lathe turning trapezoidal thread pitch accuracy generally only reach 8 to 9 (JB2886-81, the same below); in the specialized thread lathe processing thread, the productivity or accuracy can be significantly improved.

 

  3、自攻螺丝钉螺纹铣削Self-tapping screws thread milling

 

在螺纹铣床上用盘形铣刀或梳形铣刀进行铣削。盘形铣刀主要用于铣削丝杆、蜗杆等工件上的梯形外螺纹。梳形铣刀用于铣削内、外普通螺纹和锥螺纹,由于是用多刃铣刀铣削、其工作部分的长度又大于被加工螺纹的长度,故工件只需要旋转1.25~1.5转就可加工完成,生产率很高。Milling on a thread milling machine with a disc cutter or comb cutter. Disc cutter is mainly used for milling trapezoidal thread on the workpiece such as screw, worm and so on. The comb type milling cutter is used to mill the inner and outer common thread and taper thread. Because it is milled by multi-blade milling cutter, the length of the working part is longer than the length of the thread to be machined, so the workpiece only needs to be rotated by 1.25 to 1.5 revolutions Complete, high productivity.

 

  自攻螺丝钉螺纹铣削的螺距精度一般能达 8~9级,表面粗糙度为R5~0.63微米。这种方法适用于成批生产一般精度的螺纹工件或磨削前的粗加工。Self-tapping screw thread milling thread pitch accuracy can generally reach 8 to 9, the surface roughness of R5 ~ 0.63 microns. This method is suitable for mass production of general-purpose threaded workpiece or roughing before grinding.

 

  4、自攻螺丝钉螺纹磨削Self-tapping screws thread grinding

 

主要用于在螺纹磨床上加工淬硬工件的精密螺丝螺纹,按砂轮截面形状不同分单线砂轮和多线砂轮磨削两种。单线砂轮磨削能达到的螺距精度为5~6级,表面粗糙度为R1.25~0.08微米,砂轮修整较方便。这种方法适于磨削精密丝杠、螺纹量规、蜗杆、小批量的自攻螺丝螺纹工件和铲磨精密滚刀。Mainly used in the thread grinder machining hardened workpiece precision screw thread, according to different cross-sectional grinding wheel grinder and multi-line grinding two. Single-line grinding wheel can achieve the pitch accuracy of 5 to 6, the surface roughness of R1.25 ~ 0.08 microns, wheel dressing more convenient. This method is suitable for grinding precision screw, thread gauge, worm, small quantities of self-tapping screw thread workpiece and shovel grinding precision hob.

 

  多线砂轮磨削又分纵磨法和切入磨法两种。纵磨法的砂轮宽度小于被磨螺纹长度,砂轮纵向移动一次或数次行程即可把自攻螺丝螺纹磨到最后尺寸。切入磨法的砂轮宽度大于被磨螺纹长度,砂轮径向切入工件表面,工件约转1.25转就可磨好,生产率较高,但精度稍低,砂轮修整比较复杂。切入磨法适于铲磨批量较大的丝锥和磨削某些紧固用的自攻螺丝螺纹。Multi-line grinding wheel is divided into vertical grinding method and cut into the law two. Longitudinal grinding wheel width is less than the length of the thread being ground, the wheel longitudinal movement of one or several trips to self-tapping screw thread to the final size. Cutting into the grinding wheel width greater than the length of the thread being ground, the wheel radial cut into the workpiece surface, the workpiece about 1.25 turn can be polished, high productivity, but slightly lower accuracy, wheel dressing more complicated. Slitting grinding is suitable for shredding larger batches and for grinding some self-tapping screw threads.

 

  5、自攻螺丝钉螺纹研磨Self-tapping screws thread grinding

 

  用铸铁等较软材料制成螺母型或螺杆型的自攻螺丝钉螺纹研具,对工件上已加工的自攻螺丝螺纹存在螺距误差的部位进行正反向旋转研磨,以提高螺距精度。淬硬的内螺纹通常也用研磨的方法消除变形,提高精度。Made of soft material such as cast iron nut or screw-type self-tapping screw thread grinding tool, the workpiece has been processed self-tapping screw thread pitch error of the parts of the forward and reverse rotation grinding to improve pitch accuracy. Hardened internal thread is also usually used to eliminate the deformation of the grinding method to improve accuracy.

 

  6、攻丝和套丝Tapping and threading

 

攻丝是用一定的扭距将丝锥旋入工件上预钻的底孔中加工出内螺纹。套丝是用板牙在棒料(或管料)工件上切出外螺纹。攻丝或套丝的加工精度取决于丝锥或板牙的精度。加工内、外螺纹的方法虽然很多,但小直径的内螺纹只能依靠丝锥加工。攻丝和套丝可用手工操作,也可用车床、钻床、攻丝机和套丝机。Tapping is to use a certain torque to screw the tap into the pre-drilled bottom hole in the workpiece to make the female thread. Threading is the use of teeth in the bar (or tube) workpiece cut out the external thread. Tapping or Tapping processing accuracy depends on the accuracy of tap or die. Although there are many ways to process the internal and external threads, the internal thread of small diameter can only rely on tap processing. Tapping and threading can be manually operated, but also lathe, drilling machine, tapping machine and threading machine.

 

  7、自攻螺丝钉螺纹滚压Self-tapping screws thread rolling

 

  用成形滚压模具使工件产生塑性变形以获得自攻螺丝钉螺纹的加工方法自攻螺丝钉螺纹滚压一般在滚丝机搓丝机或在附装自动开合螺纹滚压头的自动车床上进行,适用于大批量生产标准紧固件和其他螺纹联接件的外螺纹。Tapping with a forming mold to plastically deform to obtain self-tapping screw Thread processing Self-tapping screws Thread rolling generally rolling thread rolling machine or automatic lathe attached to the opening and closing thread rolling head, Suitable for high-volume production of standard fasteners and other threaded couplings external thread.

 

  滚压螺纹的外径一般不超过25毫米,长度不大于100毫米,螺纹精度可达2级(GB197-63),所用坯件的直径大致与被加工螺纹的中径相等。滚压一般不能加工内螺纹,但对材质较软的工件可用无槽挤压丝锥冷挤内螺纹(最大直径可达30毫米左右),工作原理与攻丝类似。冷挤内螺纹时所需扭距约比攻丝大1倍,加工精度和表面质量比攻丝略高。The outer diameter of the rolling thread is generally not more than 25 mm, the length of not more than 100 mm, thread accuracy of up to 2 (GB197-63), the diameter of the blank used roughly equal to the diameter of the processed thread. Rolling generally can not be processed within the thread, but the material is softer than the workpiece can be non-slotted extrusion tap cold extrusion female thread (up to a maximum diameter of 30 mm), the working principle and tapping similar. Cold extrusion of the internal thread when the required torque about 1 times larger than the tapping, machining accuracy and surface quality slightly higher than the tapping.

 

  以上自攻螺丝内容是来自金蜘蛛紧固件网,信息仅供大家参考!


 

 

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