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The idea of ​​parameterized design of parametric 3D models is an effective way to solve this problem. It is one of the basic features of Pro/ENGINGEER. Pro/E is a software developed by American Parametric Technology Corporation (PTC) and has a strong modeling function. The 3D model created in the software is a fully parameterized 3D model. / Full parameterization 0 has three levels of meaning, namely the full parameterization of the feature cross-sectional area, the full parameterization of the part model, and the full parameterization of the assembly model. Part models, assembly models, manufacturing models, and drawings are fully correlated. That is to say, after the size of the drawing is changed, the size of the parent part model will be changed accordingly; otherwise, any changes in the part, assembly or manufacturing model can also be reflected in the corresponding drawing.
Parametric design is implemented in Pro/ENGINGEER through program and relation. Program is a programmatic tool provided by Pro/E to enable human-machine dialogue. Relation (also known as a parameter relationship) is a mathematical expression between a user-defined symbol size and a parameter. Relationships capture the design relationship between features, between parameters, or between assembly components, which is a way to capture design intent. The user uses it to drive the model, and changing the relationship changes the model. Parametric Process Model The 3D solid model lays the foundation for the correct generation of 2D graphics, design modification, mechanism motion analysis, and assembly interference checking in subsequent stages. Therefore, it is important to correctly create a 3D model. Shape feature modeling is an important part of correctly building a model. Shape feature classification is the basis for building a shape feature model. Reasonable classification can make the system reasonable and easy to implement, and also provide aspects for the later parameterization.
It functionally divides features into primary and secondary features. The main features of the gear shaft of the system include curves, swivels, and the like. Auxiliary features include chamfers, keyways, etc. for each part. The main features of the inner ring plate include a rotating body, a hole, and the like. Pro/ENGINGEER provides feature-based solid modeling capabilities for product design through rotation, chamfering, rounding, and stretching. The low speed shaft model is shown in the high speed shaft model. The assembly relationship of the high-speed shaft reducer is combined with the transmission type and main parameters to determine the hierarchical relationship of the product, clarify the assembly analysis and assembly constraint types, and finally determine the parameter constraint relationship of each part. The assembly of the product is not a simple accumulation and combination between the components, but an organic connection between the individual assembly units. There are mainly key joints, threaded joints, interference joints, drive couplings and rolling slide joints.
Dump Truck, Tipper is through hydraulic or mechanical lifting and self-unloading cargo vehicles. Also known as dumpers. From the vehicle chassis, hydraulic lifting mechanism, cargo compartment and take power plant and other components.
Scope
Dump Truck in civil engineering work and is often combined with excavators, loaders, conveyor and other construction machinery, constitute loading, transportation and unloading production lines, earthwork, gravel, bulk material handling and transportation work.
working principle
Dump truck engine, chassis and cab of the truck and the general structure of the same.
Dump the car after tipping and lateral tipping points to two types of operating system by control rod movement, backward tipping more common, pushing the piston rod so that the car tipping a few two-way tipping.
High-pressure oil through distribution valves, tubing into the lift cylinder, front-end cab car safety shield.
The engine through the transmission, PTO driven hydraulic pump unit, hydraulic tilting mechanism from the tank car, hydraulic pumps, dispensing valve, hydraulic lifting cylinders, control valves and tubing and other components.
The engine through the transmission, PTO devices driven hydraulic pump, high-pressure oil through distribution valves, tubing into the lift cylinder, push the piston rod so that the car tipping. After the tipping more common, by manipulating the system control movement of the piston rod, the car can stop at any desired position on the slant. Carriage using its own gravity and hydraulic control reset.
Taxonomy
1. In accordance with Brand:
Dongfeng truck, FAW dump truck , Auman dump truck, FOTON dump truck, heavy truck Steyr, Hongyan IVECO dump truck, JAC dump truck, FAW heavy dump truck , Shaanxi Shacman dump truck, HOWO dump truck, BEIBEN dump truck,Sino Truck Tipper.
2 according to shape classification:
Single axle dump truck, Double Axle dump truck, flat truck, tipper truck, the top four after eight 8*4 dump truck, tractor double axle dump truck, dump truck trailer Bridge
3. The species classification:
Bully dump truck, dump truck Huancavelica, 140 dump truck, dump truck 145, 153 dump truck, dump truck 1208, a Small Dump Truck, dump truck dongfeng
4. Follow the links on the form of a hydraulic cylinder and lifting cars Category:
Direct Push tilt mechanism; link tilt mechanism.
5. Use according to category:
Agricultural dump truck, dump truck, Garbage Truck, dump truck transport of coal,
Construction machinery dump truck, dump truck sludge
6, depending on the driving mode is also divided into 6x4, 8x4 dump truck and Semi-Trailer dump truck.
7. Depending on the application is also divided into mining trucks, used to transport coal, sand and gravel; sanitation green dump truck used to transport garbage.
8, according to the car there before turning in the direction of Bootstrap and roll type dump truck. There are still two-way dump truck rollover, mainly used in construction.
The current domestic production of dump truck manufacturers have a relatively well-known Chinese heavy truck Jining Commercial Vehicle Co., Ltd., Tong Tong Group Special Vehicle Co., Ltd., China National Heavy Duty Truck Hubei Warwick Special Purpose Vehicle Co., Shaanxi Heavy Duty Automobile Co., Ltd.
advantage
Since the car can automatically load certain tipping angle discharge, saving unloading time and labor, shorten the transport cycle, improve production efficiency, reduce transportation costs, it is a commonly used special transport vehicles.
Care Tips
The new dump truck or car repair factory commissioning must be carried out so that the car ran smoothly without lifting process.
When using the various parts should be required to correct selection of lubricants, saving time and labor unloading, lifting mechanism strict schedule swap oil.
According to the rated load of the shipment, non-overloading.
Practice
1, can not be loaded in the middle of a sudden the elevator lift handle to the "down position."
In the event of this error, the car suddenly rushed down, the frame will bring a great impact, and even accidents. Therefore, we should try to avoid the above operation, if special circumstances also need to be careful, try to slow down the landing speed, the car suddenly do not have to avoid falling in the end.
2, do not mention the use of stronger car - brake suddenly unloading.
Due to fierce mention car inertial force is large (typically 5 to 20 times the rated lifting force), can easily result in permanent deformation of the frame, carriage and pay the frame open welding, burning or destruction of the pump seals, hydraulic cylinders and other damage damage , reduced service life of the vehicle, there will be severe rollover accident. Therefore, the general dump truck while driving ban lifting.
3, after the dump truck to be unloaded disengage the power take off before driving.
If this occurs operational errors, dump truck while driving, because the PTO in the "engaged" position, the lift pump is at "small cycles" state high speed for a long time no-load operation. Cause oil temperature rises rapidly, easily lead to damage to the pump seals, the pump even "burn" phenomenon; more serious is the operation of the pump means that the hydraulic system has a power source, in driving the process prone to auto-liter car since the accident.
4, with the power take off is not available in the "on" position.
If the "on" state (red light lit), the pump will continue to rotate, the hydraulic system there is a power source, so it will because the gas control valve on the steering malfunction caused by automatic car lift; gas at this time distribution valve control even in "down" position, but also into the oil pump, and the pump will burn out.
Dump Truck
Dump Truck,Cargo Dump Truck,Small Dump Truck,Dump Garbage Truck
CLW GROUP TRUCK , http://www.clwgrouptruck.net