Design and optimisation of an ultrasonic die system for forming metal cans

A new manufacturing process has been developed for reducing the diameter of one end of a tinplate can by over 30%. Conventional processes are limited to a maximum of 10% reduction and typically operate at less than 5%. The improvement was achieved by using special tooling and ultrasonic excitation of the die to reduce the forming force. Ultrasonics have been used in this way before but without a full understanding of the numerous modes of vibration of the die, and how they interact, the efficiency of earlier systems was low. Finite element analysis has been used to characterize the natural modes and frequencies of radial-mode ultrasonic dies and this has led to the development of highly efficient systems. In special cases a non-round die has been required to overcome undesirable modal characteristics; optimum shapes have been developed. A completely new method of mounting the ultrasonic dies was designed and its geometry optimized (again using finite element analysis) to further improve the efficiency of the system. The new system operates at an amplitude under load approximately three times greater than the earlier equipment. The reduction in forming force (between 30 and 60%) makes the difference between success and failure for the manufacturing process.

[1]  Moon K. Kwak,et al.  Vibration of Circular Plates in Contact With Water , 1991 .

[2]  O. Izumi,et al.  On the Superimposing of Ultrasonic Vibration during Compressive Deformation of Metals , 1966 .

[3]  O. Izumi,et al.  Effects of Superimposed Ultrasonic Vibration on Compressive Deformation of Metals , 1966 .

[4]  John R. Tyrer,et al.  Three Dimensional Analysis Of Volume Vibrations By Electronic Speckle Pattern Interferometry , 1989, Other Conferences.

[5]  K. Salama,et al.  Accelerated fretting wear testing using ultrasonics , 1986 .

[6]  R. Guyan.  Reduction of stiffness and mass matrices , 1965 .

[7]  D. H. Sansome,et al.  The effect of tool attachment on the resonant characteristics of ultrasonic waveguides , 1970 .

[8]  Robert D. Adams,et al.  The damping characteristics of certain steels, cast irons and other metals , 1972 .

[9]  B. H. Hanson.  Present and future uses of titanium in engineering , 1986 .

[10]  J. Sinisterra,et al.  Application of ultrasound to biotechnology: an overview. , 1992, Ultrasonics.

[11]  D. H. Sansome,et al.  Review of the application of ultrasonic vibrations to deforming metals , 1975 .

[12]  D. H. Sansome,et al.  The development of oscillatory metal-drawing equipment — an engineer's view , 1974 .

[13]  John R. Tyrer,et al.  Three-Dimensional Vibration Analysis Using Electronic Speckle Pattern Interferometry (ESPI) , 1989, Other Conferences.

[14]  G. Gladwell,et al.  Natural frequencies of free finite-length circular cylinders , 1975 .

[15]  E. Lehfeldt.  Influence of Ultrasonic Vibration on Metallic Friction , 1966 .

[16]  P. M. Beckham,et al.  Exploiting solid state ultrasonic motors for robotics , 1988, IEEE 1988 Ultrasonics Symposium Proceedings..

[17]  Frank Claeyssen,et al.  Design of Actuators Based on Biased Magnetostrictive Rare Earth-Iron Alloys , 1993 .

[18]  Anand Jagota,et al.  The Influence of Lateral Wall Vibrations on the Ultrasonic Welding of Thin-Walled Parts , 1987 .

[19]  G. M. Chapman,et al.  Frequency Analysis of an Ultrasonically Excited Thick Cylinder , 1989 .

[20]  T. Mason,et al.  Sonochemistry. Part 1—The physical aspects , 1987 .

[21]  Pllm Piet Derks.  The design of ultrasonic resonators with wide output cross-sections , 1984 .

[22]  Tsujino,et al.  Studies on Ultrasonic Butt Welding , 1984 .

[23]  Kenji Uchino,et al.  ELECTROSTRICTIVE ACTUATORS: MATERIALS AND APPLICATIONS. , 1986 .

[24]  Peter T. Gough,et al.  Wide bandwidth, constant beamwidth acoustic projectors: a simplified design procedure , 1989 .

[25]  Gale E. Nevill.  Effect of vibrations on the yield strength of a low carbon steel , 1957 .

[26]  C. R. Hill.  The possibility of hazard in medical and industrial applications of ultrasound. , 1968, The British journal of radiology.