The Voice of the Finishing Industry since 1936

  • PF Youtube
  • PF Facebook
  • PF Twitter
  • PF LinkedIn
6/8/2015 | 2 MINUTE READ

Robotic Grit-Blast System’s Twin Tables Keep Downtime to a Minimum

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

The RB-72 TT was designed for production descaling and surface preparation.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Guyson Corp’s RB-72 TT robotic blast system features two turntables on a shuttle transfer cart that facilitates loading and unloading during the automated grit blasting cycle. The RB-72 TT was designed for production descaling and surface preparation of components up to 66" in diameter and weighing up to 4,000 lbs.

A 6-axis Fanuc M-710iA robot is mounted on a robust pedestal in a vestibule at the rear of the blasting enclosure and isolated from the grit-blast environment by a custom-tailored suit of laminated fabric. The robot is used to direct two pressure-blast nozzles attached to the end-of-arm tooling. The Fanuc R-30iB controller stores motion programs for processing dozens of different components and is configured to the robotic blast system’s programmable automation controller (PAC).

The twin turntables of the RB-72 TT are servomotor-driven and controlled as a seventh and eighth axis of coordinated robotic motion to enable precisely regulated rotation or radial orientation of components during the robotic blasting and air wash blow-off cycles. Each table is designed to accept and positively locate interchangeable fixtures for a range of different sized components.

The doors that seal the blast chamber are attached to the powered transfer cart, and the track extensions on which the shuttle cart rolls are fitted with vacuum return catch trays to capture any grit carried out on the cart. Safety light curtains located near the track extensions prevent indexing of the transfer cart if an attendant may not be clear of the area. A safety interlocked door is positioned at the front of the robotic blast system and at the robot vestibule to allow access for periodic inspections and normal maintenance activities.

A scanner wand is provided at each side of the robotic grit blasting system to automate component identification and call-up of the correct process recipe and motion program for dozens of different parts. When the code is scanned from a traveler slip or a mark on the part itself, and the component is recognized, the PAC recalls blasting parameters such as blast pressure and grit flow rate for that particular part number, and it confirms the robot controller is prepared to execute the correct motion program associated with that component. Scanner technology can also be used to identify the part-holding fixture and ensure it matches the process recipe.

The twin turntable configuration keeps the time between blast cycles to a minimum. Once a queued component is loaded onto the table and scanned-in, the attendant can be occupied with other duties. At the end of the blow-off cycle for the part currently being processed, the robotic blast system will automatically index the transfer cart and initiate the next blasting operation.

Prospective users of automated or robotic blasting equipment are invited to submit sample components for free laboratory testing and application engineering evaluation at the blast machinery manufacturer’s factory in northeastern New York State. 

Related Topics

RELATED CONTENT

  • In Mechanical Finishing, All That Glistens Is … Or Is It?

    Surface finish types for commercially supplied stainless steel sheet are detailed in various standards. ASTM A480-12 and EN10088-2 are two; BS 1449-2 (1983) is still available, although no longer active. These standards are very similar in that they define eight grades of surface finish for stainless steel. Grade 7 is “buff polished,” while the highest polish—the so-called mirror polish—is designated Grade 8

  • Microabrasive Precision Shot Peening

    Precision shot peening brings an entirely new concept to the field of microabrasive blasting, and it is complementary to its larger cousin. Using glass bead media, several companies have been shot peening for years with microabrasive blasting technology.

  • Buffing & Polishing: The Need for Speed

    The correct peripheral speed is an important consideration in getting the right results from your buffing operation. A buff that is turning too fast or too slow may result in damage to the buff or to the workpiece.

Resources