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Support high-speed machining to support high-speed cutting technology, improve product accuracy, reduce the number of codes, and increase processing quality and efficiency. Parametric trajectory editing and trajectory batch processing CAXA manufacturing engineers' trajectory re-generation function can realize parametric trajectory editing. Users only need to select the existing CNC machining trajectory and modify the original defined machining parameter table to regenerate the machining trajectory.
Cylindrical spur gear model establishment of cylindrical spur gear parameters: (unit mm) modulus m3 number of teeth Z32 tooth angle 20 degrees circle diameter D points = mZ96 base circle diameter D base = D points cos902 tooth top garden diameter D top D 2m102 tooth width B30 involute polar coordinate equation = D base tan(t)(0t30)22 Operation steps 1) Select 3D CAXAxp manufacturing engineer software: Click the icon to open the software interface 2) Draw according to the measured gear parameters: Select XOY Plane, click on the sketch. D base = D points cos (D points = mZ, cos094), D top D points 2m (1) in the f (x) selected polar input curve equation: = D base tan (t) 0t30. (2) base circle It is divided into 2Z points, which intersects the X-axis positive direction at 1 point, close to 1 point and rotates counterclockwise to 2 points.
(3) Take the involute line in the f(x) icon, and take the end point to connect with the 1 point; then make the plane image of the original involute to the X axis, and take the end point to connect with the 2 points. (4) Cut off the extra lines to make the graph a single-toothed outline. (5) Perform an array to form a full tooth contour and check for a split ring. (6) Dig the inner hole and the keyway.
Simulating the machining process Simulating the machining operation steps 1) Click on the relevant line to pick up the gear outline in one plane. 2) Select menu to apply the trajectory to generate plane contour processing, select parameters: based on the top surface, the milling cutter has a height of 5mm per layer (milling), a total of 30mm in 6 layers, and a machining accuracy of 001mm. In order to determine the cutting amount, in order to be true Simulation, delicate machining, set the spindle speed to 100r/min, cutting speed 80r/min; milling cutter parameters are tool radius 05cm, corner radius 025cm and so on. 3) According to the lower left prompt, select the direction of the machining, and generate the trajectory line for the infeed and retract points. The line outside the gear in the figure is the trajectory line, which is distributed in 6 layers.
Conclusion 1) The integrated manufacturing process of CAD/CAM is realized by CAXA (Mechanical Manufacturing Engineer) software. 2) The software display model is clear and the parameters are expressed correctly; in the simulation manufacturing, the tool, cutting amount and cutting layer parameters can be adjusted according to the actual parameters of the workpiece, and the machining process can be simulated. 3) Automatically generate G code and convert it into txt file, which can be directly input into the machine tool, observe its processing track, provide digital service for the actual machining process, and play an active role in protecting the numerical control equipment.
Bushing Parts:
A common application is in vehicle suspension systems, where a bushing made of rubber (or, more often, synthetic rubber or polyurethane) separates the faces of two metal objects while allowing a certain amount of movement. This movement allows the suspension parts to move freely, for example, when traveling over a large bump, while minimizing transmission of noise and small vibrations through to the chassis of the vehicle. A Rubber Bushing may also be described as a flexible mounting or antivibration mounting.Based on different embeded material,bushing could be divided into Steel Bushing,Cpper bushing,Aluminium Bushing,and rubber bushing.
These bushings often take the form of an annular cylinder of flexible material inside a metallic casing or outer tube. They might also feature an internal crush tube which protects the bushing from being crushed by the fixings which hold it onto a threaded spigot. Many different types of bushing designs exist. An important difference compared with plain bearings is that the relative motion between the two connected parts is accommodated by strain in the rubber, rather than by shear or friction at the interface. Some rubber bushings, such as the D block for a sway bar, do allow sliding at the interface between one part and the rubber.
Advantages and disadvantages:
The main advantage of a bushing, as compared to a solid connection, is less noise and vibration are transmitted. Another advantage is that they require little to no lubrication.
Disadvantages include:
(1)Bushings can deteriorate quickly in the presence of oils (e.g., motor oil, mineral oil) and extreme heat and cold.
(2)Flexibility of rubber also introduces an element of play in the suspension system. This may result in camber, caster, or toe changes in the wheels of the vehicle during high-load conditions (cornering and braking), adversely affecting the vehicle's handling. For this reason, a popular aftermarket performance upgrade is the replacement of rubber suspension bushings with bushings made of more rigid materials, such as polyurethane. Polyurethane bushings are also available for many vehicles with approximately the same characteristics[citation needed] as the manufacturers original bushings, but with greatly increased durability.This is useful on vehicles that have a reputation for wearing out standard rubber bushings, but for which harder bushings with increased harshness of ride are not wanted.
Applications(automobile):
· Anti-roll bar (US Sway bar) links and mountings
· Shock absorber mountings
· Double wishbone suspension assemblies
· Gear stick for vehicles with a manual transmission
· Most high-speed inline internal combustion engines are prone to torsional vibration of their crankshafts; the straight six and straight eight engines being particularly prone to this problem due to their long crankshaft length. Although straight eight engines faded from the marketplace in the 1950s, many straight six engines have and still do feature crankshaft vibration damping utilizing rubber bushes. The 3,442 cc Jaguar XK 6-cylinder engine of 1948 and most subsequent versions of the ubiquitous Jaguar XK engine used a proprietary Metalastik vibration damper to protect their crankshafts from potentially damaging torsional vibrations. To quote William Heynes, "The Metalastik damper consists of a steel plate to which is bonded, through a thick rubber disk, a malleable iron floating weight. Variations of the weight, rubber volume and mix, give these dampers a very wide field over which they can operate."
In skateboards, bushings enable the tilting of the trucks, thus allowing the board to turn.
In fastening, bushings are also used to transfer loads from a fastening to a much larger area in the underlying structure, the object being to reduce the strain on individual fibers within the underlying structure.
Steel Bushing,Copper Bushing,Aluminium Bushing,Rubber Bushing
VESTA Motoring Ltd , http://www.vesta-industry.com