Parker Products WCS-SIF-01 manual General Operation Spotwelding Units 3 ported guns, Front View

Page 2

WCS-SIF-01

Training & Maintenance Manual

Description & Operation

General Description of Spotwelding Units

The spotwelding system is an integrated pneumatic controlled circuit that is specifically designed to increase production throughput, while improving weld quality and reducing decibel noise level.

Each unit consists of 2 independent, 2 position, directional control valves for retract (pre-stroke) and weld stroke. Each valve is dual pressure, with single solenoid / spring assist return or double solenoid available. Also included with each unit is a proportional / quick dump valve, a feedback sensor for initiating the welding process, and a flow control for metering the impact speed of the weld tips.

ANSI (3 Ported Cylinder Option)

Inductive Sensor / Connection: Turck

Connection Diagram Inductive Sensor

 

1

Brown

+4 VDC Power Supply

 

3

Blue

0 V Power Supply

 

 

 

4

Black

Switch Wire

 

 

 

 

 

 

 

 

 

 

+

-

 

 

 

 

 

 

 

 

 

 

 

 

1

3

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pnp

14

 

 

14

 

Pr

 

 

 

 

4

R+

 

4

W+



 



1

 

 

1

W-

 

 

 

 

Retract (Pre-Stroke)

 

Weld Stroke

R-

Valve

 

Pw

Valve

 

General Operation of

Spotwelding Units – 3 ported guns

Spotwelding systems control both retract (pre-stroke) and weld stroke motions. When a 3 ported cylinder is used, the control block functions as follows:

1.The pre-stroke (retract) valve is energized, allowing the weld cylinder to extend under full line pressure by actuating the quick exhaust valve and moving to its predetermined position prior to welding.

2.The quick exhaust valve time is adjusted by the knob on top of the unit. To start, the white line on the dial is set at top dead center. Turn knob clockwise to set quick exhaust valve open time. Continuing to turn knob clockwise will lengthen time until it reaches a full 360° rotation, which covers the complete timing range.

3.The weld stroke valve is then energized using a selected weld schedule pressure. The closure speed of the weld tips is controlled by the use of an adjustable flow control, thus creating “low impact”.

4.Immediately following weld tip contact with the sheet metal, two actions take place.

Front View

Weld Stroke

Flow

 

 

Valve

Control

Retract

(Pre-Stroke)

Valve

Feedback

Sensor

 

Weld Stroke

 

Valve

Back View

Quick

 

Exhaust

 

(Air

Retract

Operated)

 

(Pre-Stroke)

 

Valve

 

a. The proportional / quick dump valve that senses pressure allows the front end of the cylinder to exhaust (by-passing the flow control), providing weld schedule pressure instantly.

b. The proportional / quick dump valve also actuates a feedback sensor to start the weld cycle.

5.Once the weld cycle is complete, the weld stroke valve is de-energized, allowing the weld tips to open under full pressure.

6.The retract (pre-stroke) valve is then de-energized, allowing the weld cylinder to open completely under full line pressure.

Note: Dual pressure is provided to the control block. Line (high) pressure is used for both retract stroke and weld stroke open. Weld schedule pressure is used for weld stroke close. Dual pressure provides for weld tips to be closed for tip dressing using any pressures available, from as low as 5 PSIG to maximum line pressure.

Pneumatic



Parker Hannifin Corporation

 

Pneumatic Division

 

Richland, Michigan

 

www.parker.com/pneumatics

Image 2
Contents WCS-SIF-01 Front View General Operation Spotwelding Units 3 ported gunsAnsi 3 Ported Cylinder Option Back ViewAnsi 2 Ported Cylinder Option Ansi 4 Ported Cylinder Option Proportional / quick dump valve that sensesWiring Ported Installation Installing Weld Block with Existing EquipmentInstalling Weld Block on New Equipment How to Set the Feedback Sensor Properly Installation & Setup InstructionsHow to Set the Flow Control Properly Open ClosePneumatic System with Low Impact and Rapid Approach Control Model Selection Examples Model Number Index B6 Namur Valves 3 Ported GunsSeries VoltageWP ISO Retract ValveNPT BsppModel Number Index 5599-2 Size 000Model Number Index 5599-1 Auto Size Subbase Kits Manifold Kits Ordering Information Manifold and Subbase Kit Ordering CodeExample How To Order Add-A-Fold AssembliesAdd-A-Fold Assembly Model Number Bspp G Number StationsOrdering Information Model Number Index Generation Components Replacement Components ISO 2 Weld Block Exploded ViewB6 Series Dimensions DH Series 3 Ported Guns Dimensions DP Series 2 and 4 Ported Guns Dimensions145 .75 Inches 16.31 19.3 WP ISO Size 2 Manifold Mountable Weld Block Troubleshooting Cylinder does not extend / retractOffer of Sale Parker Hannifin Corporation