What are the advantages of multi axis servo tightening machine?

What are the advantages of multi axis servo tightening machine? Detailed explanation of specialized fastening equipment for pressure vessels and automotive assembly

The multi axis servo tightening machine relies on torque angle dual closed-loop control to synchronously lock multi-point bolts, with precise and controllable torque and traceable data throughout the process. It is widely used in heavy-duty precision assembly scenarios such as automotive powertrains, new energy PACKs, liquefied hydrocarbon tanks, wind turbine flanges, etc. This article explains the performance, selection standards, and industry application cases of Dalian tightening machines.

1、 What is a multi axis servo tightening machine

Multi axis servo tightening machine belongs to automated intelligent tightening equipment, which is composed of servo tightening shaft, drive control cabinet, positioning fixture, and data acquisition module. It can simultaneously drive multiple bolts to synchronously complete the entire process of pre tightening, locking, and pressure holding.

Different from single axis tightening equipment with staged locking, multi axis models have synchronized and uniform force distribution at all tightening points, without local stress concentration, flange curling, sealing failure and other problems. They are especially suitable for multi-point sealing workpieces such as large high-pressure tanks, engine cylinder heads, and energy storage battery packs.

In the field of high-pressure flange fastening for liquefied hydrocarbon spherical tanks, heavy-duty multi axis tightening machines break the limitations of traditional single tool staged fastening and create a mature solution for synchronous fastening of high-pressure tank bodies, greatly improving the assembly safety and sealing of high-pressure equipment.

2、 What are the shortcomings of traditional fastening methods

The pneumatic wrench is manually tightened in stages, and the torque fluctuates greatly due to air pressure and human operation. Key components such as high-pressure ball tanks and engines are prone to sealing leakage, posing safety hazards;

Without a unified tightening process, multiple step-by-step locking can cause deformation of the flange, inconsistent pre tightening force of bolts, and looseness during long-term use;

Lack of tightening data records, inability to trace product quality issues, and inability for chemical pressure vessels and new energy vehicle companies to pass quality inspection audits;

Manual locking has a slow pace, high labor costs for large-scale production lines, and repetitive high-intensity operations are prone to human errors.

3、 Multi axis servo Dalian tightening machine core highlights advantages

1. Synchronous tightening ensures even force distribution on the workpiece and reliable sealing

Multi axis synchronous output torque, minimal pre tightening error of each bolt, and no unilateral compression deformation of flanges and tank body flanges. For high-pressure conditions such as liquefied hydrocarbon spherical tanks, uniform preload can maintain sealing performance for a long time and avoid the risk of medium leakage, making it the core supporting equipment for high-pressure tank assembly.

2. High precision closed-loop torque control, suitable for various precision components

The equipment is equipped with high-precision torque sensors, with a torque control accuracy of up to ± 1%. It supports multi-stage tightening program settings and can be adapted to soft plastic shells, aluminum alloy die-casting parts, and high-strength steel flanges to prevent slipping, workpiece cracking, and thread damage.

3. Digital data retention to meet industry quality inspection traceability standards

Each tightening operation automatically stores all data such as torque, angle, tightening curve, workpiece code, etc. The local storage capacity is large and supports Ethernet docking with MES and ERP production systems. The data can be exported for future reference at any time. Strong regulated industries such as automobiles, chemical pressure vessels, and medical devices can all meet compliance requirements.

4. Adapt to automated production lines to significantly improve production efficiency

It can be integrated with assembly line fixtures and robotic arms, and the number of axes for 4-axis, 6-axis, 8-axis, and 12 axis can be customized to meet specific requirements. It can complete all point tightening in one go, increasing efficiency by 3-8 times compared to manual single tightening, reducing the number of workstation operators, and lowering overall production costs in the long run.

5. Intelligent fault warning, controlling defective products from the source

The system is equipped with multiple anomaly detection mechanisms, which immediately sound and light alarms in case of missing locks, slipping teeth, excessive torque, or abnormal angles. The production line is synchronously locked to prevent the circulation of unqualified workpieces and reduce rework losses.

4、 Mainstream application industry of multi axis servo tightening machine

1. Chemical pressure vessel and liquefied hydrocarbon spherical tank industry

High pressure ball tanks, oil and gas storage tank flanges, and connecting bolts should be tightened using heavy-duty high torque multi axis tightening machines. Synchronous tightening ensures that the flange plane is evenly stressed, ensuring long-term high-pressure operation of the tank without leakage. It is a necessary equipment for the manufacturing of large-scale storage and transportation equipment.

2. New energy vehicles and energy storage industry

The power battery PACK package, battery box, and electric drive electronic control housing are equipped with multi-point screw locking, standardized tightening procedures, and complete data traceability to meet the strict assembly standards of the new energy industry.

3. Traditional automotive powertrain

Assembly of engine cylinder head, transmission housing, chassis suspension assembly, multi axis synchronous tightening to avoid uneven pressure on cylinder gaskets and oil leakage, stabilizing the overall factory quality of the vehicle.

4. Wind power and heavy machinery industry

Fan flanges, large pump valves, and engineering machinery shells are tightened with high torque, and the heavy-duty tightening shaft can withstand long-term continuous operation, with strong durability.

5. 3C Electronics, Home Appliances, Medical Devices

The small multi axis servo tightening equipment is suitable for micro screw assembly, with controllable downforce to protect precision electronic components from being crushed.

5、 Key points for purchasing and selecting multi axis tightening machines

Torque range: 0.1-10N · m for small electronic components; 10-200N · m for automotive parts; 200-3000N · m for ball tanks and heavy-duty wind turbine flanges;

Axis customization: Select 4-axis, 6-axis, and 12 axis according to the layout of the workpiece bolt points. Non standard fixtures with irregular point positions can be used for non-uniform spacing;

Communication protocol: Priority support for Profinet and Ethernet communication, facilitating integration with the factory's digital management system;

Usage condition: Select reinforced heavy-duty tightening shaft for high-pressure heavy-duty tank body; Narrow workstations with offset and elbow tightening heads; Adjustable downward pressure buffering device for plastic workpieces.

6、 Frequently Asked Questions and Answers

Q1: What is the difference between multi axis Dalian tightening machine and pneumatic multi axis equipment?

A: Pneumatic multi axis torque accuracy is poor and there is no data record available; Servo multi axis dual closed-loop control, precise torque, and traceable data throughout the entire process, suitable for high-pressure tanks and automotive core components with high requirements for sealing and safety.

Q2: Is it necessary to use a multi axis synchronous tightening machine for the assembly of liquefied hydrocarbon spherical tanks?

A: The flange of high-pressure spherical tanks requires extremely high pre tightening uniformity, and manual step-by-step tightening can easily cause flange deformation and leakage. Heavy load multi axis synchronous tightening equipment is the preferred solution to ensure the safe operation of the tank body.

Q3: Can existing old assembly lines be equipped with multi axis tightening machines?

A: Support non-standard transformation, can customize supporting fixtures according to the original production line size, without the need for large-scale transformation of the production line, and quickly achieve automation upgrade.

Q4: How long can tightening data be saved? Can I export the report?

A: The device can store hundreds of thousands of tightening records locally, support exporting Excel and tightening curve files, and can also upload them to the cloud database in real time for long-term archiving for quality inspection and verification.

With the continuous upgrading of intelligent manufacturing and pressure vessel safety standards, multi axis servo tightening machines have become indispensable fastening equipment in the automotive, energy storage, and chemical tank manufacturing industries due to their core advantages of synchronous fastening, high precision, and digital traceability. When purchasing, enterprises can customize corresponding shaft numbers and torque specifications based on their own workpiece torque, bolt position, and digital production line requirements, which can not only improve assembly efficiency but also fundamentally reduce quality problems such as product leakage and thread damage.

If there is a need to tighten workpieces such as liquefied hydrocarbon high-pressure spherical tanks, powertrains, energy storage battery packs, etc., you can contact the equipment manufacturer to customize a dedicated multi axis servo tightening solution.