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Large Part Material Handling Robots

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The Problem

A local steel rolling mill approached Premier to improve and update one of their existing robot cells. The original system was installed over 10 years prior, and due to the harsh and unforgiving mill environment the two original robots were nearing their end of life. The system used these robots to place hollow steel sleeves on the coiling reel at the end of the rolling mill. The sleeve would act as a core for very thin gauge material being rolled and reduce the amount of scrap material at the start of each coil.

These aging robots were causing excessive downtime for the mill, as well as increasing the scrap loss at the beginning of each new coil when sleeves were unable to be placed on the coiling reel due to the robots being inoperable.

Objectives:

  • Replace two robots nearing their end of life with new Fanuc robots

  • Replace a custom inverted linear rail with a new custom Rollon-IMS RTUi. This rail acted as a 7th axis for an underslung robot in the mill pit

  • Modify and improve tooling to adapt to new robots

  • Incorporate operator feedback into the mechanical design and teaching process for the system

Design Constraints:

  • Spec two new robots and a linear rail unit that will match payload, reach, and fit within the footprint of the existing system

  • The existing system had incredibly tight space constraints with the customers facility, with one robot operating in a pit and very close to structural beams within the facility

 

Customer: Steel Rolling Mill

Industry: Material Handling/Steel Sleeves

Application: Large Part Material Handling

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The Solution

Premier Automation worked very closely with the steel mill and our vendors to specify the correct replacement robots, design a new custom linear rail to act as a drop-in replacement, and working through improvements to incorporate into the new system. The sleeve handling robot was replaced by a Fanuc M900iB/400L, and the underslung robot was replaced by a Fanuc R2000iB/220U.

 

A large amount of time was dedicated to sorting through old system documentation, mechanical and electrical drawings, and at the facility to ensure the replacement components would fit perfectly in with the existing facility structure. Ease of installation was a must for this project.

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Results

Premier successfully took on this challenge to replace both robots and an inverted linear rail with new equipment for the customer. Each objective for the project was successfully met, and now the customer is currently back to running the mill with the robots at full capacity.

Additional Project Details

  • Product Specific Details

    o Sleeves = 16” OD x 40” Long x .63 wall thickness Steel Tube

    o Sleeve weight approximately 400lbs

  • Robot Cell Operation

    o A crane operator would load the cell with a rack of “sleeves” into the system within reach of the first robot. The first robot would scan the rack to get an accurate count of the number of parts it contained, then remove them one at a time.

    o The first robot would then hand-off the sleeve to a second robot positioned in the pit of the mill. This robot would have to maneuver the sleeve around the structural supports of the mill, and then place it on the proper coiling side of the rolling mill.

    o The robots would then move to a safe position until the coil was completed and then removed from the mill by a hydraulic coil car.

  • Safe Guarding

    o Since Premier was upgrading an existing system, the guarding needed to be brought up to current RIA safety standards. This included retrofitting the access door to the system and providing a new safety interlock to meet modern safety standards. The hard guarding had to be modified to allow better operator access around the robots.

  • Robot Cell Specifications

    o Replace two end of life robots with new Fanuc Robots of comparable payload and reach

    o Replace a custom inverted linear rail with a new custom Rollon-IMS RTUi

    o Modify existing tooling to adapt to new robots

  • Process Specifications

    o Duplicate existing robot cell processes as closely as possible

    o Parts delivered to robot cell via crane operator

    o Robot must scan each rack for number of parts present and updated pick positions

    o Underslung robot must clear existing structural obstacles during all motion paths

    o Robots must not cause excessive downtime during any operation. Automated fault recovery is critical

 
  • Product Specific Details
  • Robot Cell Operation
  • Safe Guarding
  • Robot Cell Specifications
  • Process Specifications

Product Specific Details

o Sleeves = 16” OD x 40” Long x .63 wall thickness Steel Tube

o Sleeve weight approximately 400lbs

Robot Cell Operation

o A crane operator would load the cell with a rack of “sleeves” into the system within reach of the first robot. The first robot would scan the rack to get an accurate count of the number of parts it contained, then remove them one at a time.

o The first robot would then hand-off the sleeve to a second robot positioned in the pit of the mill. This robot would have to maneuver the sleeve around the structural supports of the mill, and then place it on the proper coiling side of the rolling mill.

o The robots would then move to a safe position until the coil was completed and then removed from the mill by a hydraulic coil car.

Safe Guarding

o Since Premier was upgrading an existing system, the guarding needed to be brought up to current RIA safety standards. This included retrofitting the access door to the system and providing a new safety interlock to meet modern safety standards. The hard guarding had to be modified to allow better operator access around the robots.

Robot Cell Specifications

o Replace two end of life robots with new Fanuc Robots of comparable payload and reach

o Replace a custom inverted linear rail with a new custom Rollon-IMS RTUi

o Modify existing tooling to adapt to new robots

Process Specifications

o Duplicate existing robot cell processes as closely as possible

o Parts delivered to robot cell via crane operator

o Robot must scan each rack for number of parts present and updated pick positions

o Underslung robot must clear existing structural obstacles during all motion paths

o Robots must not cause excessive downtime during any operation. Automated fault recovery is critical

Case Study Video

An industry-leading glass manufacturer produces, processes, and distributes automotive glass products that support passenger safety and security. Premier Automation Robotics delivered a solution that ensured reliability, safety and cost-effectiveness to improve the customer’s operations.

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