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Resistance Welding
Welding Lead Acid Batteries 



      The manufacture of reliable, high-performance lead-acid batteries for use in demanding automotive, marine and industrial applications poses significant challenges in the arena of resistance welding. The central issue involves welding together a series of lead castings, called “tombstones”, which constitute the cores of the individual battery cells.  These lead tombstones must be linked together using consistent and precisely controlled weld nuggets in order to assure proper operation and long-life of the final battery assembly.

      Unfortunately, the intrinsic properties of the lead castings present a high level of variability that makes it very difficult to achieve consistent results with traditional AC resistance welding processes, which are susceptible to current spikes and inherent........

Fundamentals of Resistance Welding 



Resistance welding is a thermo-electric process in which heat is generated at the interface of the parts to be joined by passing an electrical current through the parts for a precisely

controlled time and under a controlled pressure (also called force). The name

“resistance” welding derives from the fact that the resistance of the workpieces and electrodes are used in combination or contrast to generate the heat at their interface.


Key advantages of the resistance welding

process include:

• Very short process time

• No consumables, such as brazing materials, solder, or welding rods

Monitoring Secondary Voltage




Connections is a periodic newsletter published by Amada Miyachi America, which defines and explains important technical topics and issues that relate to the resistance welding industry. We believe that through communication and education

with Amada Miyachi's customers and prospects we can provide an understanding of how, when and why these products are used.


This issue of Connections looks at the fundamental importance of Weld Checking, which includes both voltage monitoring and checking mechanisms

to assist in maintaining consistency in the resistance welding process.

Design of Experiment Tool



Amada Miyachi America Equipment DoE Tool and Process Audit Worksheet

Water Chillers
Temperature and Laser Performance



      Re-circulating-liquid cooling systems are used in many of today's commercially available lasers to efficiently remove waste heat and avoid overheating of critcal components.  Although there are numerous heat-transfer fluids used as coolants for a wide variety of laser applications, water is by far the most common coolant used. If the system is properly designed, a re-circulating-water system provides an efficient, effective, and reliable means of cooling high-power laser systems.

    There are many types of re-circulating cooling systmes (or chillers) used to circulate fluid.  For most laser applications, however, a closed-circuit refrigerated......

Laser Welding & Marking
Laser Welding Fundamentals 



1. Laser basics 


1.1 Introduction 


The word “LASER” is an acronym for Light Amplification by Stimulated Emission of Radiation. The elements of a laser are – 

1. Laser medium 

2. Input “pump” energy

Laser Marking Fundamentals 



1. Laser basics 


1.1 Introduction 


The word “LASER” is an acronym for Light Amplification by Stimulated Emission of Radiation. The elements of a laser are – 

1. Laser medium 

2. Pump energy

Laser Marking Video



Laser Marker Demonstration


EV Battery Terminals
Copper Buss Bar Connections 



•Proven capability to split 0.008 inches (0.2 mm) thick metal into two members measuring 0.004 inches


•Incorporate geometric shapes into product design that were not previously possible


•Can be produced in stainless steel, brass, copper, aluminum, and carbon steel


•Precision makes MET-SPLIT™well suited for applications in the medical, electronics, and telecommunications industries

IPB-5000A Manual



The Miyachi IPB-5000A is an inverter-type power supply designed for spot welding and fusing.
It is easy to move and install, as it is small in size and compact. In addition, the monitor function is provided which makes possible the judgment of defective or non-defective welding. 

HF2 Manual Part 1



The Unitek Peco High Frequency Inverter (HF2) is a 2 KHz, three-phase, state-of-the-art inverter welding control for joining precision small parts at high speed with controllable rise times using 2 KHz output pulses superimposed on pure DC welding energy. High speed (250 micro-second) digital feedback automatically controls weld current, voltage, or power, providing more welding consistency compared to traditional direct energy (AC) or stored energy (CD) technologies. Microprocessor technology automatically compensates for changes in workpiece resistance, load inductance, weld transformer saturation, and ñ 13% changes in line voltage. The HF2 uses IGBT power device technology for precisely controlling the weld energy.....

HF2 Manual Part 2


Chapter 7



System Options

The HF2 Weld Control has ten different system options available. Most of these user programmable options allow you to modify how an external input such as a Foot Switch interfaces with the HF2 Weld Control. Other options allow the operator to decide what type of Weld Head will be used and how the Weld Head will interface with the HF2 Weld Control. 

MM-370A Operation Manual




Miyachi Weld Checker MM-370A is a measuring instrument designed for stationary resistance welding machines.
The instrument can measure the current, voltage, current flow time, force*1, displacement*1, and external input voltage (max. ± 10 V)*1 and display their waveforms.
(*1: Force/displacement-equipped specification function. You can select to measure force or external input voltage in measurement section on the STATUS screen.)


The LCD screen ensures clear viewing of the welding current and force waveforms for optimal welding quality control. Further, it is equipped with a printer, allowing to print measurement values and waveforms without having to attach an external printer. 


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