Inline Dual-Head Screw Fastening Machine

Project scope

We designed an inline dual-head screw fastening machine for tray-based product assembly. The machine uses X, Y and Z motion, two screw fastening heads, CCD position recognition, product tray conveying and screw feeders configured by station requirement.

The confirmed output reference is 600 to 900 PCS UPH. The project parameter table notes that overall board-level UPH will decrease as the number of screw feeders increases, and that the final value should be determined from actual site conditions. Operator requirement is not specified in the parameter table, so it is not claimed here.

Supporting multiple screw specifications

The workstation list includes M4, M5 and M6 screw combinations across different stations. Some stations require one feeder, while others require two, three, four or six feeder groups. The machine therefore needs a layout that can keep the dual-head fastening platform consistent while adapting feeder quantity to the station.

Preserving tray positioning before fastening

Because the product is carried on a tray, the fastening system needs position recognition before locking. The CCD recognition module is used to locate the product before the two fastening heads perform the screwdriving operation.

Inline fastening layout

The layout combines a product conveying tray, two fastening heads, a CCD recognition point, X/Y/Z motion axes and screw feeder groups positioned around the fastening area.

Feeder configurations

The confirmed station table defines station-based feeder counts and reference feeder-module dimensions. Stations using 1 or 2 feeders share a 1050 x 1140 x 1752 mm reference size. Higher feeder counts use larger footprints.

Station	Screw specification	Feeder count	Reference size
2-1	M4, M5	1	1050 x 1140 x 1752 mm
8-1	M4, M5	1	1050 x 1140 x 1752 mm
9-1	M4, M5	2	1050 x 1140 x 1752 mm
12-1	M4, M6	2	1050 x 1140 x 1752 mm
13-1	M4, M5	1	1050 x 1140 x 1752 mm
10-1	M5, M6	2	1050 x 1140 x 1752 mm
3-1	M4, M6	3	1300 x 1140 x 1752 mm
7-1	M5, M6	6	1900 x 1140 x 1752 mm
11-1	M5, M6	4	1450 x 1140 x 1752 mm

Reference dimension set

The detailed feeder-dimension drawings provide module envelopes for the 1/2 feeder, 3 feeder, 4 feeder and 6 feeder arrangements. The general parameter table refers back to these detailed dimension drawings for L x W x H sizing.

Reference parameters

Item	Confirmed specification
Air supply	0.4 to 0.6 MPa
Power supply	AC220V
Planned capacity	600 to 900 PCS UPH
Capacity note	Board-level UPH decreases as feeder quantity increases; final value depends on site conditions
Control system	PLC
Operator requirement	Not specified in the project parameter table

Proposed operating result

The proposed machine gives the screw fastening process a modular inline platform. Product trays move through the fastening area, CCD recognition supports product positioning, and the dual-head fastening system works with station-specific feeder groups.

Process value

The process value is configurable screw feeding around a consistent dual-head fastening core. The same equipment concept can support M4, M5 and M6 fastening requirements with 1, 2, 3, 4 or 6 feeder groups, while the confirmed planning range remains 600 to 900 PCS UPH subject to actual feeder count and site conditions. Commercial return figures are not included in the project data, so ROI is left unclaimed.