CNC fatigue specimen low stress longitudinal polishing machine

Equipment meetsNADCAP AC7101/7D, ASTM E606/E606M X3 processing requirements for fatigue specimens.

Main parameters

1. Vertical grinding and polishing, with no lateral movement during the polishing process. The rubber lining thickness under the sand belt is greater than 5mm, and the grinding and polishing pressure can be adjusted and monitored, with a pressure not exceeding 2.7kg.

2. The sand belt is fed continuously and automatically, with adjustable feed rate, achieving only one grinding and polishing per sand belt area.

3. The rotation speed of the sample can be adjusted, and the number of grinding and polishing cycles of the sample can be adjusted.

4. Real time removal of grinding and polishing sand particles on the sample.

Equipment Technical Parameters

1. Basic Parameters

   Grinding and polishing power: 400W

   Grinding and polishing speed: infinitely adjustable

   Grinding and polishing stroke: ＞ 0-250mm

   Working diameter range: 4-25.4mm

   Scale range: 0-360 °

   Total power of machine tool: 1kw

2. Grinding and polishing system components：

   1) Longitudinal grinding and polishing of the test piece, automatic feeding and recovery of the sand belt, rubber roller lining under the sand belt, adjustable grinding and polishing pressure. There is pressure monitoring and pressure regulation

   2) The sand belt feeding system adopts the function of adjusting the swelling force.

   3) Sand belt feeding system, servo torque output detection, compensation function.

3. Test piece positioning clamping system:

   1) The double top uses a pneumatic three jaw device with a hole rotary cylinder for clamping, allowing for quick disassembly and replacement.

   2) The sample is equipped with a double top quick clamping mechanism with a middle hole positioning and anti slip properties.

4. Longitudinal feed system of power head:

   1) Servo control with fast forward, work in, and rewind functions, and adjustable feed speed.

   2) The grinding grade screw advance and retreat system runs smoothly and persistently, and is easy to maintain, adjust, and replace.

5. Power head rotation system:

   1) Equipped with Delta servo motors and synchronous toothed belt transmission, the transmission is smooth and energy-saving.

   2) The power head adopts a maze style dust-proof design to prevent polishing dust or sand particles from entering the interior of the spindle and causing damage to the spindle bearings.

6. Machine tool electrical control system:

   1) Machine tool design, with functions such as manual, semi-automatic cycle, and automatic cycle.

   2) Human computer LCD screen touch operation and setting interface, permission management.

   3) Bottom mounted cooling electrical cabinet, compact structure, easy to maintain.

   4) Imported brand PLC and electrical components to ensure long-term operation.

   5) Machine tool configuration circuit voltage stabilization and filtering devices.

7. Safety, dust protection and excretion system:

   1) Operating table independent lighting system.

   2) The machine tool has overload and power-off protection measures, and is equipped with a fault alarm device.

   3) All electrical components are equipped with thermal protection and magnetic protection, and can withstand low temperature and humid environments of -12 ℃.

   4) Automatic start is controlled by a dual hand start button and an emergency stop button is set.

   5) The bed protection adopts a fully enclosed protective cover method, and the protective cover of the worker's operating area is made of transparent material, which is easy to operate and observe, ensuring that chips do not fall to the ground, oil and gas do not splash, no leakage, no pollution to the environment, and easy to clean.

   6) The polishing area of the test piece is compressed, tracked, and discharged to prevent secondary contamination of abrasives. A dust collector is placed below to actively remove debris.

Main electrical brands

Other equipment

Replacement of spare parts for sand belt rubber wheels

Multiple sets of sanding belt discs

Silicon carbide sand belt/alumina sand belt (multiple mesh configurations)

It is recommended to equip three workstations to prevent different sand particles from contaminating each other and reduce the frequency of changing sand belts. Usually, polishing three times can achieve a roughness Ra of 0.2-0.3 μ m