Optimal Synthesis of the Adjustable Knock-Out Cam-Follower Mechanism of a Bolt Former

Hwang, Wen-Miin; Yu, Chii-Zen

doi:10.1243/095440605x31553

Cited by 8 publications

(6 citation statements)

References 3 publications

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“…Generate Goblet Styling. When the central coordinate of the roller is known, we can then work out the motion curve of the follower through geometric analysis [23]. e motion curve is used to design the projective curves for goblet styling.…”

Section: Adjusting the Cam Profilementioning

confidence: 99%

“…However, all the aforementioned studies have focused on methods for designing an adjustable linkage mechanism. In 2005, Hwang and Yu [23] proposed a method for designing an adjustable cam mechanism to design a cam profile with adjustment. For the cam profile with a polynomial segment, in addition to specified boundary conditions, one parameter was used as a design variable of an optimization design.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Design and Kansei Engineering in Goblet Styling Design

2020

Mathematical Problems in Engineering

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In this study, we developed a computer-aided product design method for goblet styling design based on two methods. The first was parametric design derived from an adjustable cam mechanism, which was used for shape generation, and the second was Kansei engineering, which was used for shape evaluation. In the shape generation method, motion curves from an adjustable cam were used. Designers can collect feature point data from existing products to define the boundary conditions of adjustable cam motion equations; furthermore, adjustable motion curves allow parametric design. Through adjusting a single parameter, motion curves were changed to be used as projective curves for the styling design of goblets. Then, a coordinate transformation method was applied to support the three-dimensional styling design of goblets. In the shape evaluation method, some goblet stylings were regularly selected to determine adjective degrees by production design experts. Adjective degrees for goblets that had not been selected were determined through interpolation. Market demand was defined as the preference of customers for specific adjective degrees for goblets.

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Section: Adjusting the Cam Profilementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric Design and Kansei Engineering in Goblet Styling Design

2020

Mathematical Problems in Engineering

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“…A moving hinge at (C) connects this element to a rod (6), whose end (D) is hinged to the press bed (1). Two slideways (7) guide the press bed during its displacement. Paired cams (8) drive rotation of the press bed (1) by means of a pair of rocker arms (9) and rod (10), which ends directly with its hinge (F) on the press bed.…”

Section: Description Of the Machinementioning

confidence: 99%

“…To evaluate whether the motion of the entire mechanism can be optimized, polynomials can be used to impose different trajectories and to simulate its behaviour. Hwang and Yu [7] used this technique for the adjustable knock-out cam-follower mechanism of a bolt former.…”

Section: Introductionmentioning

confidence: 99%

Study of the press forming mechanism of a thermoforming machine

Belforte

Colombo

Raparelli

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part C:

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The paper presents kinematic and dynamic investigations of the main press forming mechanism of a thermoforming machine. A multibody analysis of this press forming mechanism, which lifts and rotates a press bed, was carried out. Press bed lifting, which is necessary to form the component, is performed by means of a first rod and toggle mechanism. Press bed rotation to eject the formed component is produced by means of a second rod and must be appropriately shifted. These rods are oscillating followers driven by cams, making it possible to precisely define trajectories as a function of the motor shaft rotation angle. Analysis is performed by numerically solving the equations of motion. Cam synthesis on the basis of the oscillating followers’ trajectories makes it possible to obtain cam profiles in order to evaluate pressure angles and check that there is no undercutting. System dynamics is investigated in order to evaluate motor torque and analyse internal stresses on the hinges. In addition, some experimental results and those obtained with the dynamic model are compared. Performance improvement of the actual machine is carried out by modifying the trajectory of the press bed by means of a numerical code at the purpose developed. This approach is more convenient than the use of a commercial multibody code, which is not specifically built for parametric studies.

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“…In the view of the past studies on cam profile optimization, a number of traditional and evolutionary optimization methods have been adopted by researchers to improve the kinematic or dynamic characteristics of cam–follower mechanism. For traditional optimization methods, the golden section method, 12 Kriging method, 13 and Lagrange multipliers method 14 were applied in the optimum design of cam profile. On the other hand, some scholars eagerly focused on genetic algorithm, 15 particle swarm technique, 16 and multiobjective optimization 17 to deal with the optimization problem recently.…”

Section: Introductionmentioning

confidence: 99%

Cam profile optimization for the delivery system of an offset press

Ouyang

Wang

Huang

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this paper, a relatively new strategy known as unified optimization is applied to the cam profile optimization for the delivery system of an offset press by integrating the procedure of single objective optimization with ADAMS software. The proposed approach mainly consists of two parts that includes a single objective optimization procedure and a multibody dynamic model of cam–follower mechanism. For the procedure of single objective optimization, the design process starts from defining the follower acceleration profile by using a modified trapezoidal curve, then genetic algorithm is adopted to determine the evaluating indexes for the kinematic behavior of cam–follower mechanism in multiobjective optimization. Subsequently, sequential quadratic programming, which deals well with equality and inequality constrains, is selected as single objective optimized algorithm in this part. On the other hand, the dynamic simulation developed by ADAMS software is carried out to investigate the dynamic characteristics of cam–follower mechanism. Finally, an optimization cycle, also known as iterative process, is proposed to implement the procedure of single objective optimization and dynamic simulation alternately to improve the kinematic and dynamic characteristics of cam–follower mechanism fully. The cam profile optimization method presented in this paper provides a new tool for cam designers to avoid the undesirable impact and follower jump.

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Optimal Synthesis of the Adjustable Knock-Out Cam-Follower Mechanism of a Bolt Former

Cited by 8 publications

References 3 publications

Parametric Design and Kansei Engineering in Goblet Styling Design

Parametric Design and Kansei Engineering in Goblet Styling Design

Study of the press forming mechanism of a thermoforming machine

Cam profile optimization for the delivery system of an offset press

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