Banyak peralatan perlu tepat, supaya ia bernilai. Walau bagaimanapun, apabila skru bola sedang beroperasi, suhu tinggi akan menjejaskan ketepatan peralatan, terutamanya beberapa jentera berketepatan-tinggi. Dan faktor manakah yang akan meningkatkan suhu skru bola?
The elements of temperature rise are basically these three types: 1. Pre-pressure 2. Smooth 3. Pre-tensioning
1. The influence of pre-pressure
In order to prevent any loss of step of the mechanical transmission system, it is important to improve the rigidity of the nut. However, to improve the rigidity of the nut, it is necessary to make the preload of the nut reach a certain level. Applying pre-pressure to the nut will increase the conflicting torque of the screw and increase the temperature rise during operation.
HIWIN menyokong bahawa pramuat sederhana dan berat ialah 8 peratus daripada beban dinamik; pramuat sederhana ialah 6 peratus hingga 8 peratus; pramuat sederhana dan ringan ialah 4 peratus hingga 6 peratus; pramuat ringan adalah di bawah 4 peratus, dan pramuat terberat tidak boleh melebihi 10 peratus Beban dinamik untuk mendapatkan jangka hayat terbaik dan kesan kenaikan suhu yang lebih rendah.
2. The effect of smoothness
The selection of smooth oil directly affects the temperature rise of the ball screw. HIWIN ball screw must be smoothed with oil or grease. Generally, it is recommended to use bearing lubricating oil as ball screw lubricating oil, and for grease, it is recommended to use lithium soap-based grease. The choice of oil viscosity is based on operating speed, operating temperature and load conditions.
It is best to choose low-viscosity oil when the working condition is high speed and low load; when low speed and high load, it is recommended to use high viscosity oil. Generally speaking, it is recommended to use the viscosity index scale of 32-68 cSt (ISO VG 32-68) (DIN 51519) apabila minyak pelincir ialah 40ijazah; Pampasan dilakukan dengan pra-menarik; dan nilai sasaran pampasan sebelum-menarik ialah nilai T negatif yang ditunjukkan pada lukisan. Pretensi yang berlebihan akan membakar galas sokongan, jadi HIWIN menyokong menggunakan nilai pretensi kurang daripada 5ijazah, tetapi ia tidak sesuai untuk pretensi jika diameter skru melebihi 50mm; diameter skru yang besar memerlukan daya pretensi yang besar, yang membawa kepada sokongan Galas terlalu panas dan terbakar.
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