Development of the Design and Fabrication System for Planar Cam Mechanisms

2020 ◽  
Vol 902 ◽  
pp. 114-125
Author(s):  
Pham Huy Hoang ◽  
Le Quang Ngoc
Keyword(s):  
Control System ◽  
Linear Optimization ◽  
Numerical Data ◽  
Control Program ◽  
Circuit Board ◽  
Cnc Machine ◽  
Cam Mechanism ◽  
Cam Design ◽  
Cam Profile ◽  
To Receive

Cam mechanisms are used as the control system in several industrial fields such as filling and canning, textiles, automotive. This paper introduces the development of a software for designing planar cam mechanism adapting the dynamic and kinematic requirements. The designed cam profile is then changed into numerical data used to generate the machine codes served for CNC-based fabrication. Traditional cam design is very complicated and has accumulated errors. The envelope theory and inverse method are utilized to perform constraint in pressure angle and motion. The smallest cam radius is then determined in a non-linear optimization adapting the constraints. The paper also presents the design of a CNC machine for cam profile fabrication. The design includes the control system and the circuit board. The CNC control program is built to receive numerical data from cam design section, to simulate the cam profile fabrication and then to fabricate. The optimal design and fabrication are applied to the cam mechanisms with knife-edge/roller reciprocating/oscilating followers. The verification shows that the designed and fabricated cam adapts the requirement of accuracy.

Application of Parallel Indexing Cam Design Software Platform in Intermittent Mechanism Designing of Die-Cutting Machine

2010 ◽  
Vol 174 ◽  
pp. 303-306 ◽  
Author(s):  
Xiang Dong Shi ◽  
Shao Hua Shen ◽  
Cheng Wen Chai
Keyword(s):  
Small Radius ◽  
Radius Of Curvature ◽  
Software Platform ◽  
Design Quality ◽  
Excessive Pressure ◽  
Improve Design ◽  
Cam Mechanism ◽  
Cam Design ◽  
Cutting Machine ◽  
Cam Profile

The formation of parallel indexing cam profile was described in detail with the calculation of the cam profile data. With VB as the software platform, the parallel indexing cam contour was calculated, the contour mapping was also displayed, and the data was saved as required format. Then a three-dimensional entity of the parallel indexing cam mechanism is drawn up directly in SolidWorks in order to perform the 3D parameterization design and motion emulation of the parallel indexing cam mechanism. This can help designers to find the problems, such as the rotation difficulties caused by excessive pressure angle, the motion distortion caused by small radius of curvature. So the designer can make modification in time to improve design quality and shorten the product development cycles. The software platform can select type of the interval splitter by calculating and selecting the power motor according to the input drive shaft angle and the output shaft such shares. The system could perform the transmission of information and share the information between subsystems, enhancing the degree of integration and automation of parallel indexing cam design and manufacture. A good software platform was developed for parallel indexing cam mechanism’s design, manufacturing and performance studying. Finally, the example of interval paper-feed mechanism in an automatic die-cutting machine was verified the usability and effectiveness of the software platform.

DESIGN AND ANALYSIS OF CAM MECHANISM WITH TRANSLATING FOLLOWER HAVING DOUBLE ROLLERS

2015 ◽  
Vol 39 (3) ◽  
pp. 397-406
Author(s):  
Jung-Fa Hsieh
Keyword(s):  
Kinematic Model ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Principal Curvatures ◽  
Surface Theory ◽  
Cam Mechanism ◽  
Pressure Angle ◽  
Straightforward Method ◽  
Cam Profile ◽  
Analytical Expressions

The pressure angle is one of the primary considerations in designing a cam mechanism since an inappropriate angle may cause excessive sliding loads on the follower. This paper presents a simple yet straightforward method for the design and analysis of a cam mechanism with a translating follower having double rollers. In the proposed approach, conjugate surface theory is employed to derive a kinematic model of the cam mechanism. Analytical expressions for the pressure angle and principal curvatures of the cam profile are then derived. The validity of the analytical expressions is confirmed by machining a designed cam using a 3-axis CNC machine tool.

Design and machining of cylindrical cam with meshing indexing disc

2007 ◽  
Vol 221 (3) ◽  
pp. 341-351 ◽  
Author(s):  
J Hsieh
Keyword(s):  
Kinematic Model ◽  
Cnc Machine ◽  
Cam Design ◽  
Comprehensive Method ◽  
Design And Manufacturing ◽  
Machine Elements ◽  
Cam Profile ◽  
Profile Design ◽  
Cost Efficient ◽  
Nc Data

Cams are fundamentally important machine elements, which provide a simple means of generating virtually any follower motion. This paper presents a simple yet comprehensive method for the design and machining of a cylindrical cam with a meshing indexing disc. In the proposed methodology, homogenous coordinate transformation and conjugate surface theory are employed to develop a kinematic model for the cam profile design. The pressure angle and the principal curvature of the designed cam are analysed using the analytical expression derived for the profile. The required NC data equations are obtained by solving the CNC link variables by equating the machine tool ability function with the tool location matrix. The proposed methodology is verified by machining the designed cylindrical cam using a 4-axis CNC machine. The inspection results obtained from a 4-axis CMM show that the profile measurements of the machining cam are in excellent agreement with those of the designed profile. The results confirm that the methodology presented in this study enables the cam design and manufacturing tasks to be successfully integrated. As a result, the production process is flexible, automatic, cost efficient, and controllable.

Based on the Target Track Cam Design Method and Numerical Solution Research

2011 ◽  
Vol 143-144 ◽  
pp. 463-467
Author(s):  
L.S. Wang ◽  
F. Wei ◽  
H. Wang
Keyword(s):  
Mathematical Models ◽  
Numerical Solution ◽  
Design Method ◽  
Integrated Design ◽  
Displacement Velocity ◽  
Cam Mechanism ◽  
Cam Design ◽  
Target Track ◽  
Cam Profile ◽  
The Relationship

In this paper, a new design method of cam is developed .To illustrate this method,a car which adopts cam mechanism to achieve specific movements is designed. By establishing the relationship between the point coordinates of cam profile and the track through the relevant mathematical models, and using the infinitesimal elements method to solve the models, the discrete points coordinates of the cam profile are obtained. The displacement, velocity and acceleration of the direction arm are simulated by Pro/E. the accurate trace of cam profile can be obtained by the method. To make the CAD/CAE/CAM integrated design of cam is reasonable.

scholarly journals Analysis and Detection Method for Machining Error of Globoidal Indexing Cam Profile

2018 ◽  
Vol 213 ◽  
pp. 01004
Author(s):  
Shuwen Sun ◽  
Zhengquan Jiang ◽  
Jie Huang ◽  
Jianwu Yang
Keyword(s):  
Machine Tool ◽  
Detection System ◽  
Cnc Machine ◽  
Cam Mechanism ◽  
Probe Radius ◽  
Movement Error ◽  
Machining System ◽  
Cam Profile ◽  
Radius Compensation ◽  
Multi Body

The profile of globoidal indexing cam is spatial undevelopable surface. It needs special CNC machine tool to finish batch production. The machining quality of the profile of globoidal indexing cam could be affected by the movement error of each part of machine tool and the clamped positioning error of workpiece. Firstly, this paper analyses the systematic error of the special machine tool of globoidal cam, derives the error transfer matrix, establishes the mathematical model of the globoidal cam profile which including all machining system errors through multi-body system theory primarily. Secondly, this method improves the measuring speed and avoids the probe radius compensation, and evaluates the tolerance of the profile greed of globoidal cam equidistant model directly. Finally, the feasibility of the measurement method is verified by experiments, and the experimental results are analysed and processed. It lays the foundation for the design, process and measurement of globoidal cam mechanism and provides a theoretical basis and key technology for developing the online rapid detection system of the globoidal indexing cam profile.

Commissioning brownstock washing controls for an evaporator limited mill

TAPPI Journal ◽  
2016 ◽  
Vol 15 (7) ◽  
pp. 459-464
Author(s):  
RICARDO SANTOS ◽  
PETER HART
Keyword(s):  
Control System ◽  
Negative Impact ◽  
Black Liquor ◽  
Pulp Mill ◽  
Control Program ◽  
Separation Point ◽  
Water Control ◽  
Oxygen Delignification ◽  
Percentage Points

An automated shower water control system has been implemented to reduce the volume and variability of weak black liquor being sent from the pulp mill to the evaporators. The washing controls attempt to balance the need for consistent and low soda carryover to the bleach plant with consistently high weak black liquor solids being sent to the evaporators. The washer controls were implemented on two bleachable grade hardwood lines (one with oxygen delignification, one without oxygen delignification) and one pine line. Implementation of the control program resulted in an increase in black liquor solids of 0.6 percentage points for the hardwood lines. Significant foam reduction was realized on the pine line since the pine black liquor solids were able to be consistently maintained just below the soap separation point. Low black liquor solids excursions to the evaporators were eliminated. Bleach plant carryover was stabilized and no negative impact on chemical consumption was noticed when controlling weak black liquor solids to recovery.

Study on Novel Automatic Steel Bundling Machine Pneumatic Control System

2012 ◽  
Vol 490-495 ◽  
pp. 594-597
Author(s):  
Cheng Qun Li ◽  
Liang Gao
Keyword(s):  
Control System ◽  
Control Program ◽  
Control Flow ◽  
Pneumatic Control ◽  
The Core ◽  
New Type ◽  
Action Process ◽  
And Control

This paper introduces a new type of automatic steel bundling machine for bundling process, which includes a pneumatic action process, mainly do some researches on the pneumatic control system. The system chooses PLC as the core control component, puts forward the hardware of control system and control flow. Eventually we have been designed the control program.

Spline Based Design of Cam Contours for Improved Dynamic Performance

1993 ◽  
Author(s):  
Holly K. Ault ◽  
James C. Wilkinson
Keyword(s):  
Dynamic Performance ◽  
Integrated Design ◽  
Polynomial Functions ◽  
Piecewise Polynomial ◽  
Cam Design ◽  
Piecewise Polynomial Functions ◽  
Cam Follower ◽  
Cam Profile ◽  
Pitch Curve ◽  
Design And Manufacture

Abstract A method for the integrated design and manufacture of radial plate cams is discussed. Currently, a cam-follower system is designed by specifying constraints on the motion of the follower. The physical cam contour or cam pitch curve are not mathematically defined. The cam is manufactured from the discretized follower motion program. A new method for cam design is proposed which will produce a smooth, mathematically defined cam pitch curve while maintaining the proper constraints on the follower motion. Piecewise polynomial functions in the form of rational and/or non-rational splines may be used. Cams will be manufactured using smoothed profiles and tested for improved dynamic performance. The results of initial investigations of cam profile design for this research are presented.

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