Centerless Grinding Dijelaskan: Perbedaan Utama dari Centered Grinding
Kita semua tahu tentang grinding dan pasti pernah melihat di tempat di mana highly finished surfaces are required. Grinding adalah jenis machining process which is done by means of abrasives. Jika kita bicara tentang centerless grinding then something is cleared by its name bahwa tipe grinding ini tidak memiliki fixed centre yaitu centerless grinding tidak memiliki fixture to locate dan fix work piece pada fixed position. Ini juga adalah type of machining process which is used to provide smooth surface to work piece.
Centerless Grinding:
In centre, less grinding work piece is not provided with fixed centre atau any kind of chuck. Work piece rotates between two rollers; both wheels rotate in same direction with different speed. One wheel is known as grinding wheel dan other is known as regulating wheel. Work piece is not provided with any motion attachment dan regulating wheel provides motion to work piece. Grinding of work piece is done between both rotating wheels. Regulating wheel is rubber bonded dan applies lateral pressure on work piece to avoid sleeping. Relative velocity between grinding wheel dan regulating wheel is responsible for material removal by shearing action. Grinding wheel rotates about fix axis dan has higher angular velocity as compared to work piece. Only grinding wheel is responsible for machining, regulating wheel only applies external pressure untuk proper grinding; it provides linear feed to work piece. Regulating wheel is not fixed at their axis, it is moveable so proper contact should be maintained between work piece dan grinding wheel. Work piece is placed over fixed work rest plate dan grinding wheel along with regulating wheel involves adjustment of position of work piece.
Centerless grinding can be categories into two type’s i.e. external centre less grinding dan internal centreless grinding. Kita familiar with external grinding which is used for finishing outer surface of work pieces tetapi internal centre less grinding have some special applications such as grinding of holes for shafts dan other internal finishing operations. Setup of internal centre less grinding is quite complicated compared to external centreless grinding.
It has four rotating wheels which are known as pressure roll wheel, support role wheel, regulating wheel dan grinding wheel. Grinding wheel is kept inside work piece as it is internal grinding operation whereas three wheels rotate outside work piece. Pressure roll wheel applies uniform pressure from outside dan support wheel support work piece during grinding operation. Function of regulating wheel is same as mentioned above.
Perbedaan antara centre dan centreless grinding:
Main objective of both types of grinding is same tetapi process is different. Both processes have their own applications, advantages dan disadvantages. Based on working operations following are some differences between centre dan centreless grinding.
| Center Grinding | Centreless Grinding |
| 1. | In centre grinding work piece have fixed centre | In centre less grinding work pieces do not have any fixed centre position. |
| 2. | Work piece is kept between two centers into chuck dan having inline axis with axis of chuck. | Work piece is placed between two rotating wheels for machining operations as mention above. |
| 3. | Work piece is rotated by means of headstock of machine tool but in some cases, work piece may be stationary only grinding wheel is rotating. | In centre less grinding work piece is rotates by means of regulating wheel dan grinding wheel only. |
| 4. | Work piece is kept in fixed jaws that’s why loading dan unloading of work piece is quite complicated dan time-consuming process. | In this case, loading dan unloading of work piece are very easy dan less time compared to centre grinding operation due to this setup time is reduced. |
| 5. | It is not very economical for mass productions if compared with centreless grinding. | It is suitable dan very economical for mass production. |
| 6. | Using centre grinding any shape dan size of work piece can be machined with better accuracy dan finishing. | With centre less grinding only cylindrical shape work pieces machined. It cannot machine flat surfaces. |
Itu tadi tentang centerless grinding. Jika ada pertanyaan mengenai artikel ini, tanyakan melalui komentar. Jika suka artikel ini, jangan lupa untuk membagikannya di jaringan sosial. Langganan situs web kami untuk artikel informatif lainnya. Terima kasih telah membaca.
