Mr. Anssi Jansson Profile

Anssi Jansson

Research Scientist at VTT Technical Research Ctr of Finland Ltd

SPIE Involvement:

Author

Publications (3)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 19 June 2003 Paper

Effect of welding parameters on high-power diode laser welding of thin sheet

Antti Salminen, Anssi Jansson, Veli Kujanpaa

Proceedings Volume 4973, (2003) https://doi.org/10.1117/12.478366

KEYWORDS: Semiconductor lasers, Laser welding, Manufacturing, High power diode lasers, Gas lasers, High power lasers, Nd:YAG lasers, Beam shaping, Carbon, Absorption

Read Abstract +

High power diode laser (HPDL) is the newest laser tool for industrial manufacturing. The most promising areas of application of HPDL are thin sheet welding and hardening. The HPDL has several advantages and disadvantages compared to lasers CO₂ and Nd:YAG lasers currently used for welding. There is quite a few industrial applications in which diode laser is the most suitable laser. A typical industrial installation consists of a HPDL, an industrial robot, work piece manipulation and safety enclosures. The HPDL welding process is at this moment conduction limited and has therefore different parameters than the keyhole welding. In this study the basic HPDL welding parameters and the effect of the parameters on the welding process, weld quality and efficiency are examined. Joint types tested are butt joint and fillet lap joint. The parameters tested are beam intensity, welding speed, spot size, beam impingement angle. The materials tested are common carbon steel and stainless steel. By the experiments carried out it can be seen that all of these parameters have an effect on the weld quality and the absorption of the laser power during welding. The higher the beam intensity is the shorter also the throughput time is. However, in case of fillet joint the maximum welding speed and best visual out look are achieved with totally different set of parameters. Based on these experiments it can, however, be seen that reliable welding parameters can be established for the welding of various industrial products. The beam quality of the diode laser is not optimum for high speed keyhole welding but it is a flexible tool to be used for different joint types.

Proceedings Article | 19 June 2003 Paper

Case studies of industrial applications of a high-power diode laser in Finland

Jari Hovikorpi, Anssi Jansson, Antti Salminen

Proceedings Volume 4973, (2003) https://doi.org/10.1117/12.478373

KEYWORDS: Semiconductor lasers, Laser welding, Teeth, High power diode lasers, Gas lasers, Laser applications, Carbon monoxide, Nd:YAG lasers, Robotics, Tolerancing

Read Abstract +

The high power diode laser is a new industrial tool. It has several advantages and disadvantages compared to the conventional industrially used CO₂ and Nd:YAG laser. The most promising areas of application of diode laser have been considered to be thin sheet welding and hardening. Quite a few feasibility studies of the use of diode laser have been carried out in Finland. So far there has been some application in which diode laser is the most suitable laser. Typically, the HPDL is integrated to an industrial robot. The welding of stainless steel housing, car door lock and catalytic converters are typical examples of applications in which diode laser has technological as well as economical advantages over the conventional laser and welding techniques. The welding of these products requires good control over the heat input, short through put time and low investment. The weld cross-section of a diode laser weld is, because of conduction limited welding process, more suitable for these applications than the keyhole welding. Hardening of a large gear wheel presents also a good example of an application in which the diode laser makes it possible to economically produce structures that have not earlier been possible. Hardening requires a special form of heat delivery in order to ensure evenly hardened zone and acceptable quality. The application was performed with two high power diode lasers. The case studies of these four applications are presented and discussed in details in this paper.

Proceedings Article | 3 March 2003 Paper

CO2 and Nd:YAG laser cladding using Stellite 6

Anssi Jansson, John Ion, Veli Kujanpaeae

Proceedings Volume 4831, (2003) https://doi.org/10.1117/12.497603

KEYWORDS: Nd:YAG lasers, Carbon dioxide lasers, Cladding, Carbon dioxide, Resistance, Particles, Argon, Abrasives, Photomicroscopy, Surface finishing

Read Abstract +

Cladding of an austenitic stainless steel with the cobalt-based alloy Stellite 6, a trademark of Deloro Co, has been investigated by using both CO₂ and Nd:YAG laser beams. This material is used for hardfacing in a number of industries, notably power generation and heavy engineering. Alloy powder was fed into the laser beam by using argon as a carrier gas. Clads were produced with a range of processing parameters, and sectioned for metallographic examination. Hardness values measured in the clads increased to a maximum with an increase in powder feed rate. This correlated with a decrease in the dendrite arm spacing observed in the micrographs. Abrasive wear testing also indicated that a finer microstructure resulted in improved properties. The Nd:YAG laser beam was found to be more efficient for melting the powder because it is absorbed to a greater extent than the CO₂ laser beam. Cladding procedures were developed for both types of laser, and it is shown that in order to maximize in-service performance, the energy input of the process should be minimized.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years