Cam Indexing System to Clients from Vietnam

Cam Indexing Systems are mechanical devices used to rotate workpieces or tools at predetermined intervals in manufacturing processes. They are commonly used in various industries, including machining, assembly, and automation.

What is Cam Indexing System?

A cam indexing system is a mechanical device that converts continuous rotary input motion into precise intermittent output motion. A profiled cam — typically barrel, globoidal, or roller gear type — drives an output turret fitted with roller followers.

Where are they used?

Applications include assembly automation, packaging machinery, transfer lines, and rotary dial systems requiring repeatable high-speed indexing with zero backlash.

Cam Indexing Systems and linear indexing tables are both positioning devices used in manufacturing processes, but they differ in terms of their motion and application.

Here’s a comparison between the two:

1. Motion:

The most significant difference between rotary indexing tables and linear indexing tables is the type of motion they provide. Rotary indexing tables rotate workpieces or tools around a central axis, offering angular positioning. In contrast, linear indexing tables move workpieces or tools in a linear direction along a straight path, providing linear positioning.

2. Workpiece orientation:

Cam Indexing Systems are ideal for applications where the orientation of the workpiece needs to be changed, rotated, or presented at different angles. They are commonly used for machining operations that require access to multiple sides of a workpiece or for assembly tasks that involve rotation or angular alignment. Linear indexing tables, on the other hand, are more suitable for processes that require linear movement, such as feeding workpieces through a series of stations or for linear assembly operations.

3. Spatial requirements:

Cam Indexing Systems are generally more compact and require less floor space compared to linear indexing tables. Their circular design allows for efficient use of space and can be easily integrated into existing production lines. Linear indexing tables, due to their linear motion, require a longer linear path and may take up more space.

4. Flexibility:

Cam Indexing Systems offer greater flexibility in terms of the number of indexing positions and the ability to execute complex rotational sequences. They can be programmed to stop at multiple angles or dwell positions, allowing for versatile operations. Linear indexing tables are typically limited to linear indexing positions and do not offer the same rotational capabilities.

5. Application suitability:

The choice between rotary and linear indexing tables depends on the specific application requirements. Rotary indexing tables are commonly used in machining operations such as milling, drilling, and grinding, as well as in assembly tasks that involve rotation or angular alignment. Linear indexing tables find applications in processes such as pick-and-place operations, packaging, and sequential assembly where linear movement is essential.

Cam Indexing Systems excel in providing angular positioning and rotational capabilities, making them suitable for applications requiring workpiece orientation changes. They are compact and offer flexibility in rotational sequences. Linear indexing tables, on the other hand, specialize in linear positioning and are ideal for tasks that involve linear movement and sequential processes. The choice between the two depends on the specific requirements of the manufacturing process.

FAQs about Cam Indexing System?

1. What distinguishes a globoidal cam indexer from a barrel cam indexer?
   A globoidal cam wraps its profile around a tapered surface, engaging multiple rollers simultaneously. A barrel cam uses a single continuous groove. Globoidal designs handle higher torques and provide smoother motion at elevated cycle rates.
2. How do engineers calculate the required index angle for a cam system?
   Subtract total dwell time from 360°. Divide remaining degrees by station count. Engineers then match that index angle to a standard cam profile — modified sine, modified trapezoidal, or cycloidal — based on shock and vibration limits.
3. How do engineers size a cam indexer for inertial load?
   Calculate total reflected inertia at the output shaft — tooling, fixtures, turret plate. Multiply by angular acceleration from the cam profile equations. Add friction and process loads. Select an indexer rated above that peak torque value.
4. Can a single cam indexer support multiple output stations simultaneously?
   No. One cam indexer drives one output turret. Multi-station transfer systems link several indexers mechanically or synchronize them electrically via servo drives sharing a common master encoder reference.

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