Air conditioning of car of urban orbit traffic is three-dimensional parameter changes a design

It Demonstrates 3D Modeling Of The Parts And Establishes A Reasonable Assembly Concept, including Parts Automatic Assembly, optimum Design Assembly Interference Analysis And Structure Analysis.

It Provides An Advanced Design Method To Facilitate The 3D Design Of Railway Train Air-conditioning Products.

Pro/Engineer is software of a when PTC company offers three-dimensional design, its used onefold database, parameter to change, be based on the concept such as feature and project data recycle. Changed the traditional idea of MDA (Mechanical Design Automation) , this kind of brand-new concept has made the new standard of MDA domain. It can arrive one case centrally to manufacturing process from the design, let all users undertake the design of same product creates the job at the same time. The article meets the requirement of the exterior interface size that knows car air conditioning to urban orbit, the framework model that uses Pro/Engineer to offer undertakes composition of structure of air conditioning unit is designed, through revising framework model, generate car air conditioning automatically three-dimensional model, raised work efficiency and accuracy rate greatly. This design is a kind of design that is down from coping (Top DownDesign) , its number is as follows according to delivering line: The client receives EI measure, framework model, exterior and duplicate geometry, spare parts (Ban gold) . Next from the top designs can count the design according to from structural composition to assemble a structure to deliver, deliver to the spare parts again next. This kind of method can assure to assemble the data correlation sex of structural whole, make the spare parts assembles the program that the structure can accord with to design completely after finishing, the alteration that can design as the structure assembles every medium part newlier automatically, and need not one by one revises a part; The spare parts can consult the curve in framework model or curved surface founds a feature, the standard feature in framework model also can consult in the meantime, the dimension that controls a part conveniently through framework thereby, appearance and assemble the position. Use what framework model can realize a product to be designed in coordination, in sharing a tool to distribute framework model the part through geometry, give each designs staff these spare parts allocation again, PDM server can be used when allocating, also can use a file to share or the means of email sends each designs personnel data; When design personnel designs component will according to deliver the data that come over to undertake designing, realize a product thereby design in coordination. At present structure of air conditioning of car of Chinese city orbit according to remand main component is wind form the following 4 kinds: Bilateral send wind, bilateral a wind; Bilateral send wind, bottom double a wind; Odd side sends wind, bottom sheet to answer wind model; Bottom double send wind, bottom sheet to answer wind model. Be aimed at below bilateral send wind, bottom double the configuration of the air conditioning of urban orbit car that answers wind, introduce specific working flow. This is the configuration of the orbit train air conditioning with wider utilization rate. Aircrew of air conditioning of structural composition design is sent by Zun Zheng room, condensation room, right evaporate room, evaporate the 5 big functions such as room lid and condensation room lid paragraph composition. Every function paragraph have different use, can realize a wind, cooling, dehumidify to reach send the function such as wind. Blower, evaporator, the different function that the main part such as condensation fan, condenser and compressor is located in aircrew respectively paragraph. Its layout sees a picture. The three-dimensional parameter of housing of sketch map of air-conditioner group position changes design parameter to change a design to have two kinds of methods normally: It is to use a program to realize three-dimensional parameter to change a design, amount of process designing of this kind of method is large, the programming with special need personnel, flexibility and expansibility are poor; 2 it is the variable drive that uses the parameter that CAD system offers to change a function to realize a model, the geometrical dimension that controls a model and tie concern, the user measures the editor that realizes pair of models through repairing a change directly, its advantage is self-evident. Pro/Engineer software can satisfy the requirement of the 2nd kind of method. Housing is three-dimensional of the model build housing to press a function paragraph cent is sent for Zun Zheng room housing, condensation room housing, right evaporate room housing, evaporate room lid and condensation room build 5 much. The biggest characteristic of housing is basically by Ban gold composition, its join means is solder after riveting first. Left (right) evaporate of room housing model build basic and identical, introduce along with all the others so. Left (right) evaporate the parameter such as the exterior dimension W of room housing, L, H is by exterior geometry model of duplicate housing framework comes, keep synchronous with framework model; Evaporate room housing is main by the 15 Ban gold of next graphs assemble and become, its exterior dimension accepts framework model obligation. Left (right) evaporate of model of housing of room of room housing condensation build: By exterior geometry duplicate framework model comes over parameter of the exterior dimension W of condensation room housing, W, Lz, H, keep synchronous with framework model; Condensation room housing is main by 23 Ban gold assemble and become, their dimension gets framework model control. Evaporate of room lid model build: Evaporate parameter of the exterior dimension W1 of room lid, W2, L2, H is by framework the model accedes those who come over, keep synchronous with framework model; Its dimension gets framework model control. Housing is three-dimensional of the model build a model to finish: Housing is folded by Ban gold entirely bend a join and become, assured to shape dimension; The position of every spare parts is default, do not need to undertake constructional again; Can undertake overall situation interferes desired result, prevent the interference between the spare parts; To material of endow of every spare parts hind, the sheet of spare parts of OK and automatic computation is heavy and the gross weight of package, automatic computation gives the seat of centre of gravity, at the same time calculable this product is right X axis, Y axis and Z axis (overweight heart) moment of inertia, build forms for reporting statistics, model. After the model of general assembly housing of orbit car air conditioning is finished, wait for fan of blower, evaporator, condensation, condenser and compressor main part loads housing, undertake interfering desired result, analyse its to install the position and layout to whether satisfy design requirement. The interference examination component that system assembles in Pro/Engineer is static state and trends two kinds. In air-conditioner group in assembling, assemble between the part that has athletic concern less, basically undertake static interference is checked. Decorate into travel refrigeration pipeline next reach electronic-controlled vigour decorate wait for the job, finish the assembly of air conditioning aircrew finally to design. CNC Milling CNC Machining