Hemming Units Technical Overview

1. General Description

The document details specifications and components of hemming units, specifically the HPPC series, designed to prevent double hits during operation. These units are compatible with HPCDB and HPCFDB drivers.

2. Dimensional Specifications

Key dimensions include overall widths of 156 mm, lengths ranging from 40 mm to 285 mm, and various precise tolerances such as 60 ±0.05 mm and 60 ±0.1 mm. The units feature multiple drilled holes (e.g., 2-φ13 E9, 4-φ13) and mounting details including M12 depth 25 mm.

3. Operation and Compatibility

The hemming units operate in conjunction with specific drivers cataloged as HPPC 40 to 140, available in increments of 5 mm and right (R) or left (L) configurations. Operational phases are identified as bottom dead center, start of return, leaving from roller, completion of hemming, and initial contact of roller, with corresponding positional values provided.

4. Component Materials and Quantities

The unit comprises multiple parts such as base, swing arm, H link, stopper, oilless bushings and washers, hinge pins, springs, rings, ball plungers, dry washers, keys, rollers, and casting pins. Materials include FCD600, SS400, S50C, S45C, SWP-A, bronze with graphite (SO#50 SP2), and bronze sintered. Quantities per component are specified, e.g., 1 base, 2 oilless bushings, 4 springs.

5. Spring Force Characteristics

Spring specifications include free length, initial length, initial tensile force, final length, and final tensile force, with values such as free lengths around 138.0 to 164.5 mm and tensile forces measured in Newtons (N) and kilogram-force (kgf). The drawing represents the right side, with the left side symmetrical.

6. Additional Notes

Dimensions in parentheses are subject to change depending on length variations. The document includes detailed tables of components and spring forces to assist in assembly and quality control.