HermeSys

Description

Design Features

  • Optimized motion subsystem for laser seam welding
  • Standard 4-axis configuration supports 3D weld profiles
  • Optional active drive or passive part clamping assembly

The HermeSys is the first motion subsystem targeted directly at laser seam-welding applications. The compact, rigid platform increases weld quality while reducing part processing time.

Direct-Drive Technology

Weld contours on implantable devices often have small features that result in large accelerations during the weld process. The direct-drive technology used on the linear and rotary axes of the HermeSys minimizes tracking errors through these complex contours. Directly coupled feedback devices are also used to ensure accurate placement of the part during the weld process.

Flexible Welding Platform

Devices intended for deployment in the body have strict limitations on the allowable package size. With travels that support package sizes up to 100 x 100 mm the HermeSys has the capacity to handle a wide array of package configurations.

3D Weld Profiles

Many weld profiles require motion in three dimensions to traverse around penetrations in the case. The HermeSys comes equipped with a 14 mm travel vertical axis that allows for non-planar weld profiles to be easily implemented.

HermeSys

Optional Clamp Assembly

The weld process can induce stress on the package due to localized heating of the case. This stress can result in separation of the case halves causing the weld seam to fail. The HermeSys has an optional passive or active driven pneumatic clamp assembly to ensure consistent contact between the case halves during the welding process. This clamp assembly can be calibrated to give accurate and repeatable clamping force.

Real-time Transformation

Aerotech's Automation 3200 control platform includes specialized real-time transformation capability that greatly simplifies path programming. Weld profiles are programmed directly in part coordinate space and transformed in real time to the HermeSys actuator coordinate space. This allows for on-machine modification of the program to optimize the weld profile. Advanced 2D and 3D path optimization tools can be applied to automatically adjust weld speed and laser power to ensure consistent weld quality over a wide range of part features.

Kinematic Part Fixture

An automated load/unload system is recommended to fully utilize the throughput enhancements that are available with the HermeSys system. Aerotech has designed a kinematic coupling system for precision registration of the devices on the rotary axis. The coupling system has wide acceptance angles on the mating interfaces that allow for low cost robotic or pneumatic material handling systems.

HermeSys-2

Specifications

Mechanical Specifications

SpecificationsX AxisY Axis (Vertical Direction)Z Axis (Focal Axis)Rotary Axis
Travel 100 mm 14 mm 50 mm Unlimited
Accuracy ±1 μm ±1 μm ±1 μm ±5 arc sec
Maximum Speed 500 mm/s 50 mm/s 500 mm/s 600 rpm
Maximum Clamping Force 335 N (75 lb) @ 5.5 bar (80 psig)

Dimensions

  • HermeSys

Ordering Information

Ordering Example

HERMESYS -BASE -1 -WH

Ordering Options

SeriesA AxisFocal Length OffsetMaterial Handling
HERMESYS -BASE
-PASSIVE
-ACTIVE
-1
-2
-WH

HermeSys Series (Required)

OptionDescription
HERMESYS Four-axis hermetic seam-welding platform

System Configuration (Required)

OptionDescription
-BASE Base four-axis system; no material clamping option
-PASSIVE Four-axis system with pneumatic clamp assembly; clamp axis is passive i.e., no motor or encoder
-ACTIVE Five-axis system with pneumatic clamp assembly; clamp axis equipped with a motor and encoder

Focal Length Offset (Required)

OptionDescription
-1 Linear stage position setup for <200 mm focal length
-2 Linear stage position setup for >200 mm focal length

Material Handling (Optional)

OptionDescription
-WH Pallet system with kinematic mount