Application of the Taguchi method to determine optimized parameters for designing brake of hand winch

Abstract

Brakes are used to stop movement or adjust speed to ensure safety for mechanisms or machines. In this paper, the brake applied to hand winch will be studied. This hand winch has been studied by us in previous stages. However, the disadvantage of the winch is that the drum wall attached to the friction surfaces is not reasonable in terms of layout, as well as the parameters to optimize braking moment have not been calculated. A new brake structure is proposed in this study to solve the above problem. This structure does not use the drum wall as the friction surface. It does not affect the drum wall and it is easy to replace the friction surface when necessary. Instead, the cone brake is suitable for the structure brake and the size, structure, and design load. To determine the optimal parameters of the brake structure, the article will analyze the theory, and experiment design. The objective function is the maximum braking torque. Constraints are hand winch parameters, installation, friction surface material, and loading conditions. The corresponding factors are coded according to the Taguchi method, the orthogonal planning matrix is L18. Using Minitab software to analyze the Signal/Noise ratio, the study determined the optimal values for five factors including screw thread pitch, coefficient of friction (screw thread), cone angle, friction coefficient (brake), and large cone brake radius. Research results have selected the optimal parameters of the brake, and the optimal values have satisfied the constraints. The torque at the cone brake is greater than that of the disc brake approximately 37.7 %. The pressure at the friction surface is reduced by about 55 % compared to the disc brake surface

Improves the Brake Working of the Rescue Winch to Control the Stop Brake Process

“…Basket 2 lowers due to its weight, the drum rotates on screw thread shaft 9 with angular speed and presses against friction surface 2b with spring 8. The winch in Figure 2 is different from [5,6], and [9] in that it can use a motor to increase working speed, and the brake has spring 8 and friction surface 2c to control the braking process.…”

“…The axial force of the screw thread due to the torque caused by the torque on the drum (acting as a nut) when lowering, deploying, and applying to the problem, changes according to [7,9] to obtain:…”

“…In another way, the braking moment due to the axial force F depends on the structural parameters of the brake, applied to the problem and transformed according to [8,9], we have the braking model with brake surfaces 2a and 2b as formula (13):…”

“…Instructions for designing and calculating parameters to optimize brakes are mentioned in [8], including brake surface pressure, brake torque for disc brakes, and clutch brakes. Research in [9] has designed a cone brake for manual winches at low speeds. In case of high speeds, this structure is difficult to ensure smooth braking, acceleration, and shock can exceed the limit, allowed term.…”

Utilizing numerical simulation to determine the reasonable parameters for the design of hydraulic rock-splitting head

“…Several optimization methods using numerical approaches and their fundamental applications in mechanical engineering are discussed in [20]. Additionally, [21] has applied the Taguchi method based on the theory of statistical probability to optimize the geometric parameters of a cone brake.…”