Wheels - the main carrier for the vehicle's entire vehicle, is the most important safety component for the performance of the vehicle. It not only has to bear the self-weight load of the vehicle itself in the vertical direction when it is static, but also needs to withstand the irregular stress generated by various dynamic loads from various directions due to starting, braking, turning, rock impact, and unevenness of the road surface. test. As the most important wheel component of the wheel, it can be said to be one of the most important symbols to measure the quality and grade of the whole vehicle. So how is a safe, excellent, beautiful and practical wheel that is produced?
First, the basic structure of the hub
1. Rim: Cooperate with the tire assembly to support the wheel portion of the tire.
2. Spokes: Install and connect with the axle hub to support the wheel part of the rim.
3. Offset: The distance from the center of the rim to the mounting surface of the spoke. There are positive offset, zero offset, and negative offset.
4. Rim: Maintain and support the rim portion of the tire.
5. Bead seat: It is in contact with the tire ring and supports the rim portion in the radial direction of the tire.
6. Slot bottom: In order to facilitate the assembly and disassembly of the tire, a pit with a certain depth and width is left on the rim.
7. Valve hole: Install the hole of the tire valve.
Second, the production process of the wheel hub and related inspection standards
1. Melting (Melt)
The raw material aluminum ingot (A356) is passed through the smelting equipment. The qualified aluminum water must be sampled and placed in a spectrometer (Spectrum Apparatus) to check the composition. Only when the composition meets the standard, the next step is allowed.
2, casting (Casting)
The low-pressure casting method is adopted, the aluminum water is under, the mold is on, the aluminum water is raised by the bottom pressure method, and the casting is formed through the gate.
X-ray inspection (inspection inspection): Detection of shrinkage, air bubbles, dross, etc. of castings.
A polishing test will be performed after casting.
3. Heat treatment
The purpose of heat treatment is to improve the performance of the wheel, and to realign the various components in a high temperature manner to improve the strength of the wheel.
Tensile test: The strength, tensile force, and the like of the blank after heat treatment were tested.
4, machine plus
The hub blank is machined, including the processing of the rim, the mounting surface, and the center hole. The machining center machine refers to drilling a bolt hole and a decorative hole with a drill press. There are also machining of valve holes.
Dynamic balance: The purpose is to detect the comfort of the wheel.
Three coordinates: The purpose is to check the position of the PCD.
Air tightness: Airtight inspection of each wheel.
Full size inspection: It is used to check whether the new product meets the customer's drawing requirements.
5, surface treatment - painting and plating
The surface treatment is to put a beautiful coat on each wheel. Painting is the most common painting process. Gacosia products use German painting technology and equipment to ensure that every wheel is perfect. Electroplating - after polishing, ultrasonic treatment, galvanizing, matt nickel plating, copper plating, semi-fluorescent nickel plating, chrome plating, a beautiful and beautiful electroplating product will be available. Electroplating products can make the car thanks to its unique luster. More dazzling, luxurious and elegant!
Salt spray test: Test the finished product to see if the paint stripping and plating are unstable.
Wheel inspection standard
There are three requirements for the form test of the hub:
1, Impact Test (Impact Test)
2, bending fatigue test (Cornering Fatigue Test)
3, rolling fatigue test (Radial Fatigue Test)
In the production process of aluminum alloy wheels, spectral material analysis, X-ray inspection (X-ray), airtight test, dynamic balance test, radial runout/end jump test, salt spray test are also indispensable.
The wheel is fitted with tires and is subjected to the impact of the upper weight at an angle of 13 degrees or 30 degrees, and the tires are required to not leak.
This test simulates a situation in which a vehicle in a vehicle hits an edge of a road or an obstacle on the road.
Bending fatigue test (Cornering Fatigue Test)
Without the tires, the periphery of the hub is fixed, and the torque is circulated on the mounting plate. No cracks are required.
This test simulates the situation when the steering wheel is constantly torqued while driving.
Rolling Fatigue Test
Just install the tires, roll on the drum, and test the life of the hub.