Table of Contents
What is Automats | Types of Automats | Advantages Of Automats
These are machine tools in which the components are machined automatically. The working cycle is fully automatic that is repeated to produce identical parts without participation of the operator.
All the working and idle operations are performed in a definite sequence by the control system adopted in the automats which is set up to suit a given work.
Classification of Automats
The automats can be classified as follows:
According to the type of work materials used:
- Bar stock machine.
- Chucking machine.
According to the number of spindles:
- Single spindle machine.
- Multi spindle machine.
According to the position of spindles:
- Horizontal spindle type.
- Vertical spindle type.
According to the use:
- General purpose machine.
- Single purpose machine.
According to the feed control:
- Single cam shaft rotating at constant speed.
- Single cam shaft with two speeds.
- Two cam shafts.
Advantages of automats over conventional lathes
- Mass production of identical parts.
- High accuracy is maintained.
- Time of production is minimized.
- Less floor space is required.
- Unskilled labor is enough. It minimizes the labor cost.
- Constant flow of production.
- One operator can be utilized to operate more than one machine.
- The bar stock is fed automatically.
- Scrap loss is reduced by eliminating operator error.
SINGLE SPINDLE AUTOMATIC CUTTING OFF MACHINE
This machine produces large quantities of workpieces of smaller diameter and shorter lengths. Components with simple form are produced in this machine by means of cross sliding tools.
This machine is simple in design. The head stock with the spindle is mounted on the bed. Two cross slides are located on the bed at the front end of the spindle. The front cross slides are used for turning and forming operations. The rear tool slide is used for facing, chamfering, recessing, under cutting and cutting off operations. Cams on a camshaft actuate the movements of the cross slides through a system of levers.
Typical arrangement of tool slide in an automatic cutting off machine is illustrated in Fig. . The required length of work piece (stock) is fed out with a cam mechanism, up to the stock stop which is automatically advanced in line with the spindle axis, at the end of each cycle. The stock is held in the collect chuck of the rotating spindle. The machining is done by tools held in cross slides operating only in the crosswise direction. The form tool held in the front tool slide produces the required shape of the component. The parting off tool in the rear tool slide is used to cut off the component after machining. Special attachments can be employed if holes or threads are required on the
This machine has a single cam shaft which controls the working and idle motions of the tools. The cam shaft runs at constant speed. Therefore working motions and idle motions takes place at the same speed. Hence the cycle time is more. Typical simple parts (from 3 mm to 20 mm in diameter) produced on this machine are shown in Fig.
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