After long-term use of the truck crane, the cycloid pinwheel deceleration may cause abnormal noise, heating, oil leakage and other conditions. The wear and fracture of the bearing seat and the falling off of the outer ring of the bearing indicate that the reducer shell is made of cast steel with poor weldability, and it is easy to produce pores and cracks during welding. When the crane rotates, the bearing seat hole bears certain vibration and impact, and the material hardness is required to be moderate, with certain impact and vibration resistance.
1. Partial replacement method
Surveying and mapping the bearing seat of the reducer, and processing a new bearing seat with high-strength materials; Use the lathe to cut off the bearing seat from the rotary reducer housing, and turn the interface and thread connected with the newly made bearing seat; Connect the newly made bearing seat with the reducer housing through threads, fill the reinforcing ribs on the reducer housing with welding methods, and then weld the interface parts; Finish the new bearing seat hole to the design size.
2. Inlay method
Clean the bearing seat hole, and then bore the seat hole with a boring machine to enlarge the seat hole; The outer diameter of the turned cast steel insert is an interference fit with the bored seat hole; Install the insert into the enlarged seat hole and finish it to the design size. The method is simple and the repair time is short. The disadvantage is that the clearance requirements are high.
3. Welding method
The reducer uses a boring machine to bore the seat hole, and then appropriately increase the diameter of the seat hole; Put the shell into the oven and preheat it to about 400 ℃, and then heat the seat hole to a red hot state (about 900~950 ℃); Surfacing with copper alloy electrode to the predetermined thickness, and then put it into the oven for cooling, and finish the surfacing seat hole to the design size. The advantages are that the repaired bearing seat hole has good impact and vibration resistance, stable quality and long service life. The disadvantages are complex welding repair process, long cycle, high cost and easy wear after repair.
According to the comprehensive analysis, the latter two methods have many advantages, but they are not suitable for the repair of the shell bearing seat of cycloid pinwheel reducer.
Our products are mainly exported to Japan, the United States, Germany, Southeast Asia and other countries and regions. Our customers include many OEM customers specializing in construction machinery. We have partnered with several of the Fortune 500 companies to become one of their major foundry suppliers in China.
How to provide goods?
Usually we will ship the goods to the sea. The factory is only 460 kilometers away from the port. It is very convenient and convenient to transport the goods to any other country. Of course, if your cargo is very urgent, Ningbo Airport and Shanghai Airport are also nearby.
What is the payment term?
When we provide you with a quotation, we will negotiate with you: EXW, FCA, FOB, CIF, CRF, DAP Etc. For mass production, you need to pay 30% of the deposit before production and 70% of the balance before shipment. Our most common way is T/T.
How to ensure the quality of your products?
First, we will check after each process. For finished products, according to customer requirements and international standards.
How many employees does your company have? What is the relationship between technicians?
We now have more than 180 employees, including 36 engineers and 28 QCs.
What is the ability of your company?
We have a number of production lines with a monthly production capacity of 1,600 units and an annual production capacity of 20,000 units.
