梯形絲杠螺母的配合標準有幾點？

What are the matching standards for trapezoidal screw nuts?

梯形絲杠適用于大型螺紋的粗加工，在旋風銑削度螺桿的過程中，螺紋和滾花一次完成，效率高，成本低，加工精度低。其結構設計思想和方案具有較好的應用價值。

Trapezoidal screw is suitable for rough machining of large screw threads. In the process of whirlwind milling, the screw threads and knurling are completed at one time, with high efficiency, low cost and low machining precision. Its structural design idea and scheme have good application value.

1、絲杠螺母材質的選擇

1. Material selection of lead screw nut

45#鋼絲杠和40Cr鋼絲杠調質的熱處理工藝，調質是淬火加高溫回火的雙重熱處理，目的是讓工件具備良好的綜合機械性能。調質鋼絲杠分為碳素調質鋼和合金調質鋼兩大類，無論是碳鋼還是合金鋼，其含碳量的控制都比較嚴格。梯形絲杠的原材料是通過模具拉光到所需要的中徑尺寸，二次冷拉拉形成表面硬度(0.5 毫米深)達(18°-21°)。

Heat treatment process for 45# steel wire rod and 40Cr steel wire rod. Quenching and tempering is a dual heat treatment of quenching and high temperature tempering, so as to make the workpiece have good comprehensive mechanical properties. Quenched and tempered steel bars are divided into carbon quenched and tempered steel and alloy quenched and tempered steel. Carbon content of both carbon steel and alloy steel is strictly controlled. The raw material of the trapezoidal lead screw is polished to the required pitch diameter through the die, and the surface hardness (0.5mm deep) formed by the secondary cold drawing reaches (18 ° -21 °).

2、絲杠螺母的潤滑

2. Lubrication of lead screw nut

建議對梯形絲杠采用油潤滑，其中油池潤滑或者滴油潤滑這兩種潤滑方法更加有效。油池潤滑較滴油潤滑的方法更為合適，因為油池潤滑法能夠滿足苛刻的條件，像高速、重負荷或者外部熱傳遞，并且能夠使梯形絲杠冷卻。而滴油潤滑更加適合用于中低速度和中輕負荷這兩種情況。我們可以根據具體的使用條件選擇合適的潤滑方法。

It is suggested that the trapezoidal lead screw should be lubricated by oil, and the two lubrication methods of oil pool lubrication or oil dripping lubrication are more effective. The oil pool lubrication method is more suitable than the drop lubrication method, because the oil pool lubrication method can meet the harsh conditions, such as high speed, heavy load or external heat transfer, and can cool the trapezoidal lead screw. Oil dripping lubrication is more suitable for low and medium speed and light load. We can choose the appropriate lubrication method according to the specific service conditions.

3、絲杠和螺母的公差配合

3. Tolerance fit of lead screw and nut

YF45Mnv鋼是85Kgf/mm(785N/mm)強度別的一切削非調質鋼，其抗拉強度，疲勞性能，耐磨性能均優于傳統常用的45調質鋼及40Cr鋼。鈦浩產品選用YF45Mnv鋼，也可選用45#調質鋼及40Cr鋼。螺母材質選用，螺母材質傳統選用：錫青銅6-6-3及錫鋅青銅5-5-5。

Yf45mnv steel is a kind of 85kgf/mm (785n/mm) strength non quenched and tempered steel. Its tensile strength, fatigue property and wear resistance are better than the traditional 45 Quenched and tempered steel and 40Cr steel. Yf45mnv steel, 45# quenched and tempered steel and 40Cr steel can be used for titanium Hao products. The nut material is selected, and the traditional nut material is: tin bronze 6-6-3 and tin zinc bronze 5-5-5.

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