In order to improve the service life of extrusion taps and reduce their wear, this paper adopted coating-simulation technology investigate influence laws tool coating type thickness on torque, temperature wear amount. The validity numerical simulation results is confirmed through internal thread experiments. showed that torque single-layer composite a tendency decreasing then increasing with increase thickness; double-layer increased amount three types coatings thickness. TiAlN single...

Material flow-induced defects in extrusion internal thread can significantly reduce the bearing capacity and sealing reliability of threaded connections. To address this issue, study focuses on titanium alloy plates (Ti-6Al-4V) analyzes effects optimization variables (bottom hole diameter, chamfering depth, angle) objectives (tooth height rate, upper surface defect height, lower height) using a single-factor method. Based Box-Behnken design response method, regression model between objective...

In the internal thread extrusion forming, if process parameters are not selected properly, torque will increase, temperature be too high, or even tap break. order to obtain effective under certain working conditions, this paper uses a combination of numerical simulation and experiment analyze influence bottom hole diameter, speed, friction factor on temperature. Through an orthogonal experiment, significant law different was studied, their determined. Based optimal parameters, simulations...

Optimization design and direct torque control (DTC) of a flux concentrating axial permanent magnet motor (AFPMM) are presented in this paper, which leads the AFPMM to exhibit high capability at low-speed wide speed operation range for driving system. Firstly parameters manufacturing materials affect output performances discussed, then based on finite element analysis (FEA) response surface methodology (RSM), slot pole number combinations, structure dimensions optimized. Furthermore, novel...

This study proposes a new type of tri-screw pump, which has 1:2:3 ratio the active diameter screw, pitch circle, and top screw. Fixed width correction method driven screw is also proposed to avoid wear tooth top. The mathematical model screws established. To arc, several transition patterns are proposed, curve in form circular arc deduced. designed grinded, pump assembled. hydraulic test bench tested using overflow valve perform pressure loading 3–5 MPa on outlet pump. flow rate tested,...

The extrusion process parameters have a great impact on the quality of thread. In order to ensure and smooth progress process, prediction model based BP-GA neural network is established. takes diameter bottom hole, speed, friction coefficient as input layer, torque, temperature, tooth height output layer. After training with sample data, internal thread carried out. results show that has high accuracy in predicting temperature rate during cold threads. error between experimental value...

The diameter of the threaded bottom hole determines whether extrusion can proceed smoothly and fullness tooth shape after extrusion. height rate is an important indicator strength connection. In order to establish relationship between extruded internal thread, this paper takes aluminum alloy M8×1.25 mm thread as example, uses a method combining numerical simulation process test. Obtained changing law profile workpieces with different diameters. Using MATLAB fit results, prefabricated...

Automatic transmission has been widely used in the automotive industry, and novel automatic transmissions with simple structure reliable operation are a research hotspot. This paper proposes an multi-stage gears to simplify its working process. The comprises case driving shaft driven which mounted on case. gear pairs superimposed shafts similar tower. always engaged. All connected via flat key, by join is connect or disconnect shaft, controlled hydraulic shifting mechanism have designed...

To accommodate special applications where installation space is limited and noise vibration requirements are high, a new triple screw pump structure was proposed, which integrated into servo motor. The design optimizes the profile of master slave screws embedded pump. temperature pressure fields pump, as well heat transfer distribution between fluid in screw, were investigated through thermal-fluid-structure approach. deformation stresses compared for three operating conditions: loading,...

To address the flow field noise problem in twin-screw air compressors, multi-physical-field coupling technology is employed to perform calculations for compressor. Based on structural characteristics and generation principles of compressor, a reduction design method proposed that employs Helmholtz resonator three-chamber perforated muffler at exhaust end. The muffler’s optimization performed using genetic algorithm, effectiveness validated through calculations. results indicate effectively...