Train Wheel

Description of Train Wheel

Progresses of Train Wheel

Step	Pic	Progress	Description
1		Re-inspection of raw materials	First, after the raw materials enter the factory, the company re-inspects them according to relevant standards to ensure the stability of the quality at the source of the products.
2		The raw materials are sawn and cut	The sawing area uses high-speed circular saws from Linsinger of Austria, which feature automatic volume measurement, weighing, and other functions. The system maintains precise quality control, keeping weight deviation within just ±1KG. It can saw and blank 80 pieces per hour.
3		Ring furnace heating	The 24-meter-diameter annular heating furnace can fully load 360 pieces of fabric. It uses natural gas for heating and achieves temperature uniformity of ±10℃ through pulse proportional temperature control. The temperature at the time of discharge is 1250℃, and it has a heating capacity of 80 pieces per hour.
4		Four-wheel preforming	The wheel preforming is completed on a 50MN frame-type hydraulic press, and the first A distribution of the metal is achieved after being pressed to the required process height.
5		Wheel forming	The wheel forming is completed on a 100MN frame-type hydraulic press, achieving the secondary distribution of metal for the wheel hub, spoke plate and rim.
6		Wheel rolling	After forming, the wheel blank is placed in the DRAW1250 rolling mill for rolling, so that the spokes, rims, flanges and other parts can achieve effective forming results, and the rolling accuracy can reach ±1mm.
7		Wheel bending and punching	After rolling, the wheel billet is placed into a 50MN frame-type hydraulic press to complete the final shaping of the wheel billet spoke plate and rim. The core material is separated from the wheel body through punching.
8		Hot-state label printing	Through the information system, the identity information such as the wheel furnace number and billet number is engraved on the wheel surface by a hot-state marking machine to achieve the transfer of identity information.
9		Measurement of geometric dimensions of hot forgings	The forging and rolling line is equipped with a hot-state three-dimensional laser measurement device. At a high temperature of 1150℃, it can directly and clearly judge the forming quality of the product, provide timely feedback, and achieve parameter adjustment.
10		Quenching and heating of wheels	Through the tunnel heating furnace, the wheels are subjected to annealing, quenching heating and tempering treatment. The temperature uniformity is achieved within ±5℃ by using pulse proportional temperature control. The entire heat treatment process is automatically tracked and operated by an information system.
11		Quenching treatment of wheels	The quenching system can automatically control water temperature, water pressure and water volume, achieve online monitoring of quenching parameters, and effectively ensure the uniformity, consistency and stability of product hardness.
12		Wheel machining	The wheel processing adopts German Hangensate processing and drilling and milling centers. Each processing center is equipped with a measuring instrument, which can achieve fully automatic individual processing of single wheels. The processing accuracy is high and can be controlled within 3μm.
13		Wheel static imbalance detection	The precise measurement of the residual static unbalance value of the wheel by the centrifugal method can directly reflect the processing level and ensure the stability of the wheel during high-speed operation.
14		Wheel surface hardness testing	A Brinell hardness test was conducted on the surface of the wheel rim with a pressure of 3000kg to ensure the wear resistance of the wheel.
15		Full-size automatic measurement of wheels	The laser three-dimensional measurement method can be used to quickly achieve online detection of the geometric dimensions and tolerances of wheels, avoiding interference from human factors, and the measurement accuracy can reach 0.01mm.
16		Full-size automatic measurement of wheels	The laser three-dimensional measurement method can be used to quickly achieve online detection of the geometric dimensions and tolerances of wheels, avoiding interference from human factors, and the measurement accuracy can reach 0.01mm.
17		Ultrasonic detection of internal defects in wheels	By adopting water-immersed phased array ultrasonic detection technology, internal defects of wheels can be detected with high precision, without blind spots and quickly, eliminating potential hazards in vehicle operation.
18		Magnetic particle detection of wheel surface defects	Fluorescence wet magnetic particle inspection for surface and near-surface defects of wheels can directly identify defects that are difficult to detect with the naked eye under normal conditions, ensuring the quality of wheels.
19		Production information tracking	To ensure the traceability of the product, a serial number that can identify its identity is engraved on the surface of the product wheel hub. After the wheel is delivered to the customer, all production and manufacturing information of the product can be queried based on the serial number.
20		Finished product packaging and shipment	The adoption of an automated intelligent subcontracting system enables the automatic classification and stacking of wheels based on preset conditions. Additionally, the entire inspection line is run through by German-made mechanical arms, which can achieve rapid and accurate material transfer, and at the same time collect wheel inspection information in real time, making the inspection process clear at a glance.

Advantages

How to Find a Qualified Rail Fastener Manufacturer?

Please choose LTRF.

Why Choose LTRF?

• Strong Technical Expertise

LTRF boasts a dedicated R&D center. To begin with, it maintains long-term collaborations with major industry players such as China Railway, CRCC, and the Academy of Railway Sciences. Additionally, it partners with leading railway universities. By leveraging these strategic alliances, LTRF has successfully developed various innovative fastening systems for both domestic and international markets. Most importantly, all these systems possess independent intellectual property rights. As concrete evidence of this, to date, LTRF holds over 30 invention and utility model patents.

Professional Manufacturing

LTRF always aims for the best. We carefully choose the materials we use and make sure every part is great care and skill. And above all, we believe in doing things perfectly; as a result, we keep coming up with new ideas and check the quality of our products very carefully to make sure they’re good. What’s more, we work fast to make sure you get your order on time. Additionally, we offer good service before and after you buy something. Last but not least, at LTRF, we also focus on what our customers need. We committed to making good products and providing great service in everything we do.

LTRF control the cost of each process, and the finance department updates the cost calculation regularly. And LTRF’s advanced testing equipment endows the company with comprehensive quality inspection capabilities for the entire fastener system. This meticulous quality-control measure is crucial for ensuring product reliability. Importantly, LTRF holds ISO and CRCC certification for railway products. Furthermore, these certifications not only clearly demonstrate the company’s strict compliance with international and industry-specific standards but also significantly enhance its credibility in the market.