Introduction and application of press fit equipment

Introduction to press fit equipment

The press fit equipment is mainly powered by hydraulic pressure, with small bearings directly pressed in and medium and large bearings heated and pressed in. In the process of using the press fit method for interference fit assembly, various rated working pressures and maximum working pressures are usually adjusted to ensure the completion of the press fit assembly. However, it is unknown whether the interference fit between components meets the design requirements. Therefore, it is impossible to prevent products with unqualified fit gaps from flowing into the next process, leaving hidden dangers to product quality. Installing a suitable force measurement system on a regular press fit machine can easily complete the press fit assembly while detecting the actual condition of the interference fit, achieving the goal of controlling product quality.

two. Basic structure of press fit equipment

1）Force sensor (strain gauge): used to detect pressing force, please note when selecting The working range, accuracy level, installation method, etc. Japan Kyowa weighing sensor LC-5TV,LCH-10TF,LC-1TJ,LB-50KB ,LC-10TV,LC-20TV，LCK-A-5KN,LCK-A-10KN，LCK-A-50KN，LCK-A-100KN,LCN-A-500N,LCN-A-1KN,LCN-A-2KN Wait; Showa Showa weighing sensors BUX-100N, BUX-200N, BUX-500N, DBS-200N,DBS-500N，DBS-1KN,WBJ-02N,WBJ-03N,WBU-10N 等

2）Travel sensor: used to detect the press fit travel. When selecting, attention should be paid to the working range, accuracy level, installation method, etc

3）Amplifier: Connect the sensor signal, process the signal, and output the judgment result toPLC (amplifiers WGA-650, WGA-670, WGA-900A, WGA-200A, WGI-400A DPM-911 DPM-912 DPM-913, etc. from Kyowa Republic, Japan)

4）PLC:Used to control various actions of the press and monitoring system.PLCSimple press fit equipment does not require long-term reliable logic control rather than data collection and complex model data analysisPLC.

5）A/DCards and Computers: ThroughA/DThe data collection of the acquisition card collects measurement data and stores it in the computer for analysis.

three. Main requirements for press fit

1）Do not damage the parts during press fitting

2）The pressing should be smooth, and the pressed part should be accurately in place.

3）The introduction end of the press fit shaft or sleeve should have an appropriate guide cone, but the length of the guide cone should not exceed the fitting length15%The guiding angle should generally not be greater than10°.

4）When pressing a solid shaft into a blind hole, there should be exhaust holes or slots at appropriate locations.

5）Unless there are special requirements, the mating surface of press fit parts should be coated with a clean lubricant during press fit.

6）When using a press to press in, the required pressing force should be calculated based on the material and fit size of the part before pressing