Contact: Dave Davidson|509.563.9859 | Deburring/Finishing Technologist
ddavidson@deburring-tech-group.com | https://dryfinish.wixsite.com/iso-finish
If you have parts that need edge or surface finishing improvement and would like to have FREE sample part processing contact Dave Davidson at ddavidson@deburring-tech-group.com I can also be reached at 509.563.9859.
Before we start a sample processing project I have some questions for you. Can you complete this “Request for Sample Finishing” form? This will help us to better understand your part finishing needs and assist our process engineering and equipment recommendation efforts.
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Please cut and paste the form below into an email, answer those questions you can and send to me at: ddavidson@deburring-tech-group.com or use the document at: https://drive.google.com/open?id=1keeUL_GVcLQrPiLZXfQXAiOurRyHeY745c6JHDNpCzk
Can you also send me some smartphone pictures of the parts? Some shots showing raw vs, finished pieces (as you currently finish them) would be especially helpful.
The parts should be sent to:
MFI (Process Engineering Services)
attn: T. Mathisen and D. A. Davidson
1060 Commerce Boulevard
Howard Lake, MN 55349
Below: Here is some background on the Centrifugal Iso-Finishing method as explained by a contract manufacturer who uses the method for their deburring and finishing:
If you ship samples to us for finishing, can you forward me the tracking numbers so that I can monitor the project?
Also, include a hard copy (paper) of the sample finishing request form with the parts when shipped (this will also expedite the processing)
This document is also available as a WORD file: https://drive.google.com/open?id=1keeUL_GVcLQrPiLZXfQXAiOurRyHeY745c6JHDNpCzk
Let me know if you have any questions. If you have not already done so please let me have your contact and address information for my files.
If you have any questions, or If there is any way I can be helpful, just let me know. Thanks, – Dave Davidson: ddavidson@deburring-tech-group.com | 509.563.9859
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REQUEST FOR SAMPLE FINISHING – CONFIDENTIAL WORKSHEET
(Please include a paper hard copy of this sheet with your part shipment)
Instructions: Please cut and paste the form below to your email or Word document attachment. Please complete the form and send to Dave Davidson via Email to ddavidson@deburring-tech-group.com
_____________________________________________________________________________________
DATE:
COMPANY:
Contact Person
Email Address:
Telephone:
Delivery Address:
City:
State/Province
Postal Code:
Country:
PART INFORMATION:
Part Name and Description:
Part Material:
Part dimensions: L” x W” x D’ or Length x Diameter
PRODUCTION or PROJECTED PRODUCTION QUANTITIES
Parts per shift:
Parts per month:
THIS SAMPLE PART FINISHING SHIPMENT:
Number of Sample Parts included with this shipment?
Expedited shipping to return parts? Y/N
Expedited Shipping via.
Your company account No.
OTHER PART INFORMATION
Manufacturing operation(s) prior to finishing:
Post-finishing operations:
Description of Part Finishing Needs or Requirements:
Radius or Surface Finish requirement or specification:
Additional Notes or Comments
PLEASE ATTACH PHOTO OF PARTS IF POSSIBLE (Smart-phone Photos are OK) and send to my Email at dryfinish@gmail.com
Below: MACHINERY and Some Part Applications
Centrifugal Iso-finishing Technology
Centrifugal barrel finishing (CBF) is a high-energy finishing method, which has come into widespread acceptance in recent years. Similar in some respects to barrel finishing, in that a drum-type container is partially filled with media and set in motion to create a sliding action of the contents, CBF is different from other finishing methods in some significant ways. Among these are the high pressures developed in terms of media contact with parts, the unique sliding action induced by rotational and centrifugal forces, and accelerated abrading or finishing action. As is true with other high energy processes, because time cycles are much abbreviated, surface finishes can be developed in minutes, which might tie up conventional equipment for many hours.
The principle behind Centrifugal iso-finishing is relatively straightforward. (See the diagram above). Opposing barrels or drums are positioned circumferentially on a turret. (Most systems have either two or four barrels mounted on the turret; some manufacturers favor a vertical and others a horizontal orientation for the turret.) As the turret rotates at high speed, the barrels are counter-rotated, creating very high G-forces or pressures, as well as considerable media sliding action within the drums. Pressures as high as 50 Gs have been claimed for some equipment. The more standard equipment types range in size from 1 ft3 (30 L) to 10 ft3, although much larger equipment has been built for some applications.
Media used in these types of processes tend to be a great deal smaller than the common sizes chosen for barrel and vibratory processes. The smaller media, in such a high-pressure environment, are capable of performing much more work than would be the case in lower energy equipment. They also enhance access to all areas of the part and contribute to the ability of the equipment to develop very fine finishes. In addition to the ability to produce meaningful surface finish effects rapidly, and to produce fine finishes, CBF has the ability to impart compressive stress into critical parts that require extended metal fatigue resistance. Small and more delicate parts can also be processed with confidence, as the unique sliding action of the process seems to hold parts in position relative to each other, and there is generally little difficulty experienced with part impingement. Dry process media can be used in certain types of equipment and is used for light deburring, polishing, and producing very refined super-finishes.CBF equipment’s strong suit is the ability to develop surface finishes that may require over-lengthy time cycles in conventional equipment and the ability to develop a wide range of special surface finishes required for demanding and critical applications
Mr. Davidson is a deburring/surface finishing specialist and consultant. He has contributed technical articles to Metal Finishing and other technical and trade publications and is the author of the Mass Finishing section in the Metal Finishing Guidebook and Directory. He has also written and lectured extensively for the Society of Manufacturing Engineers, Society of Plastics Engineers, American Electroplaters and Surface Finishers Association and the Mass Finishing Job Shops Association. Mr. Davidson’s specialty is finishing process and finishing product development.
Mass Finishing Part Applications 