三马致力于打造优质传动设备蜗轮蜗杆
The combination effect of worm wheel and worm gear
Based on the failure characteristics of worm drive, selecting the data combination of worm and worm gear requires not only sufficient strength, but also outstanding ability of friction reduction, wear resistance and gluing resistance. Practice shows that the more ambitious data of worm pair is: bronze worm gear ring matching hardened grinding steel worm.
For high speed and heavy load transmission, low carbon alloy steel commonly used in worm after carburizing, surface hardening to make the hardness of 56 ~ 62 HRC, and then grinding. For medium-speed and medium-load transmission, the worm is usually made of 45 steel, 40Cr, 35SiMn, etc. Its hardness reaches 45-55HRC by high frequency quenching and then grinding. For general worm, 45 or 40 carbon steel can be used for quenching and tempering.
The axial tooth pitch pX of the worm should be equal to the end face circumferential pitch pt of the worm wheel, so the axial modulus of the worm should be equal to the end face modulus of the worm wheel, and M indicates that m should be taken as the standard value. The axial pressure angle of the worm should be equal to the pressure angle of the end face of the worm wheel. It is indicated by alpha that the normal pressure angle alpha = 20 degrees.
The worm is equivalent to the helix, and its helices are also divided into left and right, single and long ones. Generally, the head number of worm Z1 = 1 ~ 4, the more the head number, the higher the efficiency; but too many heads, such as Z1 > 4, indexing error will increase, and difficult to process. The number of teeth of worm wheel is Z2=iZ1 and I is the transmission ratio of worm drive, i=n1/n2=Z2/Z1. The worm drive with general transmission power is Z2=27 to 80. When Z2<27, the worm gear teeth are prone to undercutting; when Z2 is too large, it may cause worm gear tooth tortuous strength. If d_1 is used to indicate the diameter of the indexing circle of the worm, then the helical elevation angle on the indexing cylinder of the worm can be calculated by introducing q=Z1/tg_ lambda into the formula, and the indexing circle diameter of the worm can be found to be d_1=qm. The Q in the formula is called the worm characteristic coefficient. In order to restrict the number of hob, the Q value of each module is regulated in the specification. Generally q=6 to 17. The dividing wheel diameter of worm wheel is d2=Z2m.
Based on the failure characteristics of worm drive, selecting the data combination of worm and worm gear requires not only sufficient strength, but also outstanding ability of friction reduction, wear resistance and gluing resistance. Practice shows that the more ambitious data of worm pair is: bronze worm gear ring matching hardened grinding steel worm.
For high speed and heavy load transmission, low carbon alloy steel commonly used in worm after carburizing, surface hardening to make the hardness of 56 ~ 62 HRC, and then grinding. For medium-speed and medium-load transmission, the worm is usually made of 45 steel, 40Cr, 35SiMn, etc. Its hardness reaches 45-55HRC by high frequency quenching and then grinding. For general worm, 45 or 40 carbon steel can be used for quenching and tempering.
The axial tooth pitch pX of the worm should be equal to the end face circumferential pitch pt of the worm wheel, so the axial modulus of the worm should be equal to the end face modulus of the worm wheel, and M indicates that m should be taken as the standard value. The axial pressure angle of the worm should be equal to the pressure angle of the end face of the worm wheel. It is indicated by alpha that the normal pressure angle alpha = 20 degrees.
The worm is equivalent to the helix, and its helices are also divided into left and right, single and long ones. Generally, the head number of worm Z1 = 1 ~ 4, the more the head number, the higher the efficiency; but too many heads, such as Z1 > 4, indexing error will increase, and difficult to process. The number of teeth of worm wheel is Z2=iZ1 and I is the transmission ratio of worm drive, i=n1/n2=Z2/Z1. The worm drive with general transmission power is Z2=27 to 80. When Z2<27, the worm gear teeth are prone to undercutting; when Z2 is too large, it may cause worm gear tooth tortuous strength. If d_1 is used to indicate the diameter of the indexing circle of the worm, then the helical elevation angle on the indexing cylinder of the worm can be calculated by introducing q=Z1/tg_ lambda into the formula, and the indexing circle diameter of the worm can be found to be d_1=qm. The Q in the formula is called the worm characteristic coefficient. In order to restrict the number of hob, the Q value of each module is regulated in the specification. Generally q=6 to 17. The dividing wheel diameter of worm wheel is d2=Z2m.
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