Full-Auto Turntable Six-Station Tapping Machine

Equipped with a nozzle-type cooling system, Pulan factory's quality Full-Auto Turntable Six-Station Tapping Machine effectively improves workpiece surface finish while extending tap service life. With a production capacity of 24 pieces per minute and compatibility with workpieces ranging from 60–130mm in diameter, it is an efficient solution for large-scale filter threaded cover plate processing.

What is a Full-Auto Turntable Six-Station Tapping Machine?

The Full-Auto Turntable Six-Station Tapping Machine is an automated tapping system developed for machining internal threads on filter threaded cover plates. The machine integrates six major systems: spindle drive mechanism, spindle lifting mechanism, tap holding mechanism, rotary table indexing mechanism, cooling system, and control system.

The main motor drives the tapping spindle through forward and reverse rotation, while the pneumatic cylinder smoothly moves the spindle according to the rotation speed to complete tapping and automatic retraction. The workpiece is accurately positioned by locating pins on the rotary table. After machining, the finished workpiece automatically drops onto the wire mesh conveyor and is discharged from the machine.

With high machining consistency and excellent thread concentricity, this equipment is an ideal choice for filter manufacturers requiring continuous threaded cover plate production.

Technical Specifications

Applications & Equipment Structure

Applications

Main Components

Working Principle & Processing Flow

The machine uses a forward and reverse rotating motor to drive the spline spindle, while the pneumatic cylinder controls smooth spindle movement according to the spindle speed. The workpiece is fixed by locating pins on the station, and the rotary table continuously indexes between stations. After tapping is completed, the finished part automatically falls onto the conveyor for discharge.

Processing Steps

1. Workpiece Loading: Place the workpiece on the station with two positioning holes aligned with the locating pins.
2. Station Indexing: The rotary table cylinder rotates the table to the next station, and the positioning cylinder locks it accurately.
3. Tapping Operation: The main motor rotates forward, and the spindle cylinder pushes the spindle downward smoothly to complete thread machining.
4. Tap Retracting: The main motor reverses, and the spindle cylinder retracts upward to complete automatic thread withdrawal.
5. Finished Product Discharge: The rotary table continues indexing, allowing the completed workpiece to fall onto the wire mesh conveyor.
6. Continuous Production: The next workpiece enters the tapping station for automatic cycle operation.

Key Advantages

1. Six-Station Rotary Table Production: Six stations operate continuously in a circular cycle. Finished parts are automatically discharged without manual removal, achieving 24 pcs/min production efficiency.
2. Spline Spindle Transmission for High Precision: The spline shaft structure provides smooth power transmission, excellent concentricity, and stable thread machining quality.
3. Pneumatic Spindle Movement Without Impact: The cylinder controls spindle movement according to rotation speed, ensuring smooth tapping and retraction while protecting both taps and workpieces.
4. Taper Tap Holder for Quick Replacement: The taper-designed fixing system allows operators to replace taps quickly by simply loosening the clamping components while maintaining reliable positioning.
5. Accurate Rotary Table Positioning: The rotary table is driven by a pneumatic cylinder and locked by a positioning cylinder, ensuring consistent machining positions.
6. Continuous Nozzle Cooling System: Coolant is continuously sprayed during tapping to reduce workpiece temperature, improve surface finish, and extend tap service life.
7. Touchscreen Parameter Control: Operators can adjust tapping speed, retract speed, conversion time, forward/reverse rotation cycles, and production quantity through the touchscreen interface.
8. CE Certified Safety Design: The machine is equipped with emergency stop protection, safety guard interlock, and grounding protection systems.

Installation Requirements

1. Install the machine on a flat, clean, and well-ventilated floor away from high temperature and dust.
2. Keep at least 1 meter clearance on the left side and rear, and 1.5 meters on the front and right side.
3. Use a forklift with a capacity of more than 1 ton for transportation.
4. Secure the machine and adjust the level before operation.
5. Connect to a dedicated 380V/50Hz power supply with proper grounding.
6. Provide compressed air at 0.6MPa.
7. Check cables, emergency stop button, and safety guard door before startup.

Frequently Asked Questions

Q1: What should I do if the thread cover plate has poor concentricity after tapping?

A: Possible causes include: 

① Insufficient positioning cylinder pressure causing workpiece movement → increase air pressure.

② Incorrect distance between locating pins and workpiece positioning holes → adjust the spacing through the hexagonal shaft.

③ Tap not fixed properly → tighten the pressure cover or clamping block bolts.

Q2: Why does the tap fail to move up and down smoothly?

A: Check whether the air supply is connected correctly (0.6MPa) and whether the spindle lifting cylinder solenoid valve is operating normally. If the valve works properly, inspect or replace the spindle lifting cylinder.

Q3: What should I do if the positioning rotary table does not move into position?

A: Check whether the indexing cylinder pressure is insufficient or whether the cylinder itself has a fault. Adjust the air pressure or repair/replace the cylinder to ensure stable operation at 0.6MPa.

Q4: Why is the workpiece surface finish poor after tapping?

A: Check whether the cooling system is functioning correctly, including water pump operation and nozzle condition. Refill coolant or clean blocked nozzles if necessary.

Ordering Information

The Full-Auto Turntable Six-Station Tapping Machine is designed for high-volume tapping production of threaded cover plates used in automotive oil and diesel filters.

Pulan provides free sample testing—customers can send workpieces for trial machining and quality verification before ordering.

Customized solutions are available for different workpiece diameter ranges or special station configurations. Each machine is supplied with Chinese and English manuals, electrical drawings, and pneumatic component lists.

As a professional tapping equipment manufacturer, Pulan provides factory-direct pricing, a one-year warranty, and long-term spare parts support, including tap holders, locating pins, cylinder sealing components, and other consumable parts. Contact us for a quotation or arrange a factory visit.