Author: Site Editor Publish Time: 2020-09-02 Origin: Site
There are indispensable hose clamps between the various components of each car, such as the oil pipe, the water pipe interface, and the many pipe interfaces of the air conditioner. These hoses connect to many operating systems in the car and are indispensable for the best performance of the car.
During the driving process of a car, the work of the power source (engine or electric motor) will bring a lot of noise and vibration. In order to eliminate most of the vibration and absorb part of the noise, the connection between the power source of the car and the surrounding parts usually adopts a flexible connection. To minimize the transmission of vibration and noise, various hose hoses are commonly used in automobile cooling systems, air intake systems and steering systems. This article mainly analyzes the connection process requirements of automobile hoses, the selection of hose clamps, and the hard tube from the perspective of the assembly manufacturing process.
The Auto hose clamp is a connecting device for connecting grooved pipe fittings, valves and pipeline accessories. The hose clamps used in automobile hoses mainly have three structural forms:
Spring hose clamps , also known as elastic clamps , are made of high-quality manganese steel. They are easy to use and disassemble, tighten evenly, and can be used repeatedly.
Single-ear stepless clamps, also called single-ear clamps, are generally made of stainless steel. There are no protrusions and gaps in the inner ring of the clamp and cannot be used repeatedly.
Worm gear hose clamps, also known as worm drive hose clamps, are made of galvanized iron and stainless steel, with balanced torsion torque, firm and tight locking, large adjustment range, and can be used repeatedly.
Recommendations for auto hose clamp selection
In principle, it is not recommended to choose single ear stepless clamps, because when choosing manual clamp clamps to clamp a single ear, the clamping force is not well controlled, and local sealing problems are prone to occur. When choosing pneumatic calipers, on the one hand, the cost of calipers is relatively high. High, on the other hand the use of tools is more limited.
Choose flexible clamps for hoses whose outer diameter is below 40 mm, and choose worm drive hose clamps for hoses whose outer diameter is above 40 mm. For pipelines with special quality requirements, quick-connect plugs can be selected to replace clamp fixation (such as fuel pipes).
For pipelines with limited process operation space (such as heater inlet/outlet pipes), quick-connect plugs can be selected instead of clamp fixing.
Definition of clamp angle
The cross line of the two ears of the elastic clamp is at the uppermost end visible when looking down on the pipeline (including worm drive hose clamp ears and quick-release locking pins). If the spring hose clamps has no operating space for clamp clamps, or the clearance between the ears of the clamp and the periphery is small (require : The distance between the ear and the periphery is greater than 30 mm), the design engineer can adjust the clamp angle according to the actual structure and confirm with the process engineer.
When fixing the worm gear hose clamp, the tool space should be considered. Generally, the worm gear hose clamp bolt is vertical or parallel to the ground (requirement: the distance between the outer edge of the bolt and the peripheral gap is greater than 20 mm). When a special angle is required, the design engineer and the process engineer shall confirm together.
When the quick plug is fixed, place the locking pin on the quick plug at the top. If the two quick plugs are side by side, ensure that the gap between the outer edges of the two quick plugs is greater than 10 mm.
High quality hose clamps generally do not spring back, most of which are caused by aging or excessive force of the hoop parts. Therefore, the tightening torque cannot be too large. The rebound of the hose clamp after tightening is mainly due to the fast tightening speed and the small friction coefficient of the hose clamp screw. At the same time, the material of the oil pipe and the water pipe has a slow deformation process which causes the torque attenuation. It is recommended to tighten it in two times if possible, and add a re-tightening process to overcome the attenuation of torque. The torque standard needs to be negotiated with the supplier.