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SCHMIDT Technology


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May 2009

Schmidt Press Newsletter

Application of interest
Compliant Pin Pressing – Automotive - SCHMIDT® Application #2401
This application assembled a tire pressure sensor/transmitter that included an internal battery and a PCB, and then inspect for component functionality.  The assembly required a two step process, with the first step to insert the battery and then the second step to press the PCB over compliant pins, seat the board against crush pads in the housing.  To do this process, Schmidt integrated our STU-45P pneumatic slide table into a Nr. 405 ServoPress complete system.   Two separate nesting fixtures, to locate the housing for each operation, were mounted to the slide table and the table would shuttle the tooling from operation one to operation two, engaging only one upper pressing tool at a time.

All components are manually loaded into the tooling prior to cycle start, with the housings being loaded into the nest and the battery and PCB into their respective upper tools, held by vacuum.  Once the cycle is initiation, the press inserts the battery into the housing.  Upon completion of this operation and if the monitoring criteria specific to the battery insertion were passed, the shuttle shifts to the opposing side and the PCB is inserted.  At this point, both battery voltage and continuity between the pressed through compliant pins and the housing is verified.  With all QA parameters passed, the press ram would retract and the shuttle shifts back to position one.  At this point, the operator unloads the completed assembly from nest two, transfer the assembly from nest one to nest two and loads a new housing, battery and PCB.

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Tip of the Month
When purchasing an air press, it is important to ensure that you have the correct supply air to properly run the system.  To determine the required supply for a Schmidt press, you need to determine the air consumption of the specific press based on your set-up parameters. To do this, go to and enter the USA home page.  From here, select either pneumatic or hydro-pneumatic presses from the left product bar.  Once this is selected, click on the Air Consumption button on the right side of the page, select the press type, enter the stroke information and the air consumption per press cycle will be provided in normal liter (NL).  This value can then be multiplied by the number of cycles per minute to get L/M, which can be converted to CFM if needed.