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Jika Anda memiliki gearbox, Anda mungkin bertanya-tanya poros cacing (worm shaft) mana yang terbaik untuk perangkat Anda. Ada beberapa hal yang perlu dipertimbangkan, seperti bentuk cekung, jumlah ulir, dan pelumasan. Artikel ini akan menjelaskan setiap masalah dan membantu Anda memilih poros cacing yang tepat untuk gearbox Anda. Ada beberapa pilihan yang tersedia di pasaran, jadi jangan ragu untuk mencari-cari. Jika Anda baru mengenal dunia gearbox, lanjutkan membaca untuk mempelajari lebih lanjut tentang jenis gearbox yang umum ini.
The geometry of a worm gear varies significantly dependent on its manufacturer and its intended use. Early worms experienced a simple profile that resembled a screw thread and could be chased on a lathe. Later on, resources with a straight sided g-angle have been produced to make threads that had been parallel to the worm’s axis. Grinding was also developed to improve the complete of worm threads and lessen distortions that occur with hardening.
To decide on a worm with the appropriate geometry, the diameter of the worm gear must be in the identical unit as the worm’s shaft. After the fundamental profile of the worm equipment is decided, the worm equipment tooth can be specified. The calculation also involves an angle for the worm shaft to avert it from overheating. The angle of the worm shaft should be as near to the vertical axis as attainable.
Sebaliknya, roda gigi cacing berselubung ganda tidak memiliki leher yang mengelilingi cacing. Roda gigi ini berbentuk heliks dengan poros cacing lurus. Karena gigi cacing saling bersentuhan, gesekan yang dihasilkan cukup signifikan. Tidak seperti roda gigi cacing berselubung ganda, roda gigi cacing tanpa leher jauh lebih kompak dan dapat menangani ratusan putaran yang lebih kecil. Roda gigi ini juga mudah diproduksi.
Roda gigi cacing dari berbagai perusahaan menawarkan banyak aspek positif. Misalnya, roda gigi cacing adalah salah satu teknik paling efisien untuk meningkatkan torsi, meskipun material berkualitas rendah seperti perunggu sulit dilumasi. Roda gigi cacing juga memiliki tingkat kegagalan minimal karena memungkinkan kelonggaran yang cukup besar dalam proses desain. Terlepas dari perbedaan antara kedua spesifikasi tersebut, efisiensi umum sistem roda gigi cacing tetap sama.
Cacing berbentuk kerucut adalah variasi lainnya. Ini adalah rencana teknologi yang menggabungkan poros cacing lurus dengan busur cekung. Busur cekung juga merupakan produk utilitas yang berharga. Cacing dengan bentuk ini memiliki lebih dari 3 kontak sekaligus, yang berarti mereka dapat mengurangi diameter besar tanpa keausan berlebihan. Ini juga merupakan desain yang relatif lebih murah.
A great worm equipment demands a best thread sample. There are a couple of key parameters that establish how good a thread sample is. First of all, the threading pattern must be ACME-threaded. If this is not possible, the thread must be made with straight sides. Then, the linear pitch of the “worm” have to be the identical as the round pitch of the corresponding worm wheel. In simple conditions, this signifies the pitch of the “worm” is the same as the round pitch of the worm wheel. A fast-change gearbox is normally used with this variety of worm equipment. Alternatively, direct-screw modify gears are used instead of a rapid-modify gear box. The pitch of a worm equipment equals the helix angle of a screw.
A worm gear’s axial pitch should match the round pitch of a equipment with a larger axial pitch. The round pitch is the distance amongst the points of tooth on the worm, while the axial pitch is the distance among the worm’s teeth. One more factor is the worm’s lead angle. The angle amongst the pitch cylinder and worm shaft is referred to as its guide angle, and the larger the guide angle, the better the effectiveness of a equipment.
Geometri gigi roda gigi cacing bervariasi tergantung pada perusahaan dan tujuan penggunaannya. Pada roda gigi cacing awal, ulirnya menyerupai ulir pada sekrup, dan mudah dibuat menggunakan mesin bubut. Kemudian, penggerindaan meningkatkan hasil akhir ulir roda gigi cacing dan meminimalkan distorsi akibat pengerasan. Akibatnya, saat ini, sebagian besar roda gigi cacing memiliki pola ulir yang sesuai dengan ukurannya. Saat memilih peralatan roda gigi cacing, pastikan untuk memeriksa jumlah ulirnya sebelum membelinya.
A worm gear’s threading is essential in its procedure. Worm tooth are typically cylindrical, and are arranged in a sample related to screw or nut threads. Worm tooth are often shaped on an axis of perpendicular when compared to their parallel counterparts. Because of this, they have greater torque than their spur gear counterparts. Furthermore, the gearing has a lower output speed and higher torque.
Berbagai jenis roda gigi cacing menggunakan jumlah ulir yang berbeda pada roda gigi planetnya. Roda gigi cacing berulir tunggal tidak boleh digunakan dengan roda gigi cacing berulir ganda. Roda gigi cacing berulir tunggal harus digunakan dengan roda gigi cacing berulir tunggal. Roda gigi cacing berulir tunggal jauh lebih efektif untuk mengurangi kecepatan daripada jenis berulir ganda.
The variety of threads on a worm’s shaft is a ratio that compares the pitch diameter and variety of teeth. In basic, worms have 1,2,4 threads, but some have 3, 5, or 6. Counting thread begins can support you establish the amount of threads on a worm. A single-threaded worm has less threads than a numerous-threaded worm, but a multi-threaded worm will have much more threads than a mono-threaded planetary equipment.
To measure the amount of threads on a worm shaft, a little fixture with two ground faces is used. The worm should be taken off from its housing so that the finished thread spot can be inspected. After pinpointing the quantity of threads, straightforward measurements of the worm’s outside diameter and thread depth are taken. When the worm has been accounted for, a forged of the tooth area is manufactured using epoxy substance. The casting is moulded amongst the two tooth flanks. The V-block fixture rests in opposition to the outside diameter of the worm.
The round pitch of a worm and its axial pitch have to match the circular pitch of a more substantial gear. The axial pitch of a worm is the length between the factors of the teeth on a worm’s pitch diameter. The lead of a thread is the distance a thread travels in 1 revolution. The direct angle is the tangent to the helix of a thread on a cylinder.
The worm gear’s velocity transmission ratio is based on the quantity of threads. A worm equipment with a high ratio can be easily decreased in 1 step by making use of a set of worm gears. Nevertheless, a multi-thread worm will have more than two threads. The worm equipment is also a lot more efficient than one-threaded gears. And a worm equipment with a higher ratio will let the motor to be used in a assortment of applications.
Pelumasan roda gigi cacing sangatlah sulit, karena gesekan dan gaya kontak geser yang besar. Untungnya, ada banyak pilihan pelumas, seperti oli campuran. Oli campuran adalah pelumas berbasis mineral yang diformulasikan dengan 10% atau lebih asam lemak, penghambat karat dan oksidasi, serta aditif lainnya. Campuran ini menghasilkan pelumasan yang lebih baik, gesekan yang berkurang, dan keausan geser yang lebih rendah.
When selecting a lubricant for a worm shaft, make sure the product’s viscosity is proper for the kind of gearing utilized. A reduced viscosity will make the gearbox difficult to actuate and rotate. Worm gears also go through a better sliding motion than rolling movement, so grease should be in a position to migrate evenly through the gearbox. Repeated sliding motions will push the grease away from the get in touch with zone.
Hal lain yang perlu dipertimbangkan adalah celah (backlash) roda gigi. Roda gigi cacing memiliki rasio gigi yang lebih tinggi, seringkali 300:1. Ini penting untuk program daya, tetapi pada saat yang sama tidak efisien. Roda gigi cacing dapat menghasilkan panas selama gerakan geser, sehingga pelumas berkualitas tinggi sangat penting. Pelumas jenis ini akan mengurangi panas dan memastikan kinerja optimal. Saran berikut akan membantu Anda memilih pelumas yang tepat untuk roda gigi cacing Anda.
In minimal-velocity apps, a grease lubricant may be sufficient. In increased-velocity applications, it is very best to utilize a artificial lubricant to prevent premature failure and tooth dress in. In the two circumstances, lubricant selection relies upon on the tangential and rotational pace. It is critical to comply with manufacturer’s tips relating to the choice of lubricant. But don’t forget that lubricant selection is not an straightforward task.
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