Plasma Cutter Thickness Ranges:

Plasma Cutting machines that can use both manual and mechanized tasks generally have a lower thickness rating for mechanized cutting rather than manual. This is for some reasons.

Initial and end the cut on resources close to the maximum thickness correctly needs some operator method that is simple for a human operator but hard or not possible to program into a machine. Hence a lower rating for acceptable cuts.

Mechanized plasma cutting needs sharp in many cases rather than edge starts. A machine usually cannot pierce successfully as thick as it can cut.

Customers using plasma cutting equipment in an automated set up would normally find the cut speeds on the thickest resources too slow to be satisfactory for mechanized process.

Some Points about Used Plasma Cutters:

1. Knowing the metal thickness that you will cut through earlier is actually helpful when shopping for a used plasma cutter. Knowing your preferred cutting speed is helpful as well. If you require cutting through 3/8" steel at 10 in/minute for example, you’ll find used Everlast plasma cutters very acceptable. If you need to cut through 3/8" steel at 75 in/minute, you will find a used Everlast PowerPlasma 50 plasma cutter satisfactory. Keep in mind that the thicker the metal, the slower the cut and this is true even with high capability cutters. Should you get into a conversation concerning ratings, remember that the normal rate is 10 in/minute.

2. Plasma cutter duty cycles point out a minutes per 10 minutes ratio of a rated capability. If you were to use a machine with a 70% duty cycle for instance, it could run at 400 amps for 6 minutes without having to be cooled. This information is critical when used plasma cutters function in hot surrounds.

3. When looking at your choices of used plasma cutters, make sure you can supply a stable stream of clean and dry air from an excellence air compressor. You will also require ensuring that any air compressor you use is able of satisfying an exacting cutter’s pressure necessities. Every cutter has a different requirement, so do not think that one air pressure is suitable for every cutter. You might find a small cutter with a built in air compressor, but if you are in the market for a big cutter, be ready to seek out an external compressor with a 40 - 60 PSI.

4. Portability is one more significant issue to address. In many cases, a cutter that sits idle for a while is not that big of a deal. A cutter that will be idle for a long time, such as during transportation for example, is a large deal as it can affect the machine’s unit delay.

5. Do not forget to verify that all controls are simply accessible and functioning. All analytic lights should work and consumables (including and air filter and dryer) must accompany the whole machine at either a very little fee or at no charge at all.

6. You will also desire to see if the product’s warranty is still in effect. This will help you get your used plasma cutter serviced. If you can locate the cutter’s producer, and that manufacturer is local and still in business that is even better.

7. Upon closer assessment, avoid buying a used plasma cutter that has broken cables, dirty inside compartments or other visual signs of spoil. These types of signs point out a very short life span and/or expensive repairs down the road.

History of Waterjet Cutting

Waterjet cutting can be traced back to hydraulic mining of coal in the Soviet Union and New Zealand. Water was collected from streams and aimed to wash over a blasted rock face carrying away the loose coal and rock. Th is method of mining was redeveloped in South African gold mines to remove blasted rock from the work area into a collection drift or tunnel. In the California Gold Country between 1853-1886, pressurized water was first used to excavate soft gold rock from the mining surfaces. The pressurized water allowed the miner to stand further back from the face being washed. This was safer because there was less danger of being covered by a collapsing wall of blasted rock. By early 1900s this method of mining had re ached Prussia and Russia. In these two countries the pressurized water was used to wash blasted coal away.

In the 1930s it was Russia that made the first attempt at actually cutting the rock with the pressurized water. A water cannon was used to generate a pressure of 7000 Bars.

In the 1970s technology was developed in the USA that was capable of creating a 40,000 Bar pressure. Most of the waterjet mining growth after this involved combining a drill with the waterjet. In 1972 Professor Norman Franz of Michigan worked with McCartney Manufacturing Company to install the first industrial waterjet cutter. The equipment was installed in Alton Boxboard. Flow industries also began to market industrial waterjet cutting equipment. It was Flow Industries who added sand to a pressurized cleaning system to give metal a white finish. After this it was demonstrated that abrasive waterjet systems could cut through metal and ceramics. From here the waterjet cutting industry took off.

Plasma Cutter

Plasma Cutting Torches & SPares

Model:SD-300TP-5, SD-500TP-5
Introduction:Mixed use of argon arc welding, pulse argon arc welding, manual argon arc welding, it has energy saving control circuit to exert the reliable operation. Anti-flush, small splash, fine moulding, easy slag release, strong anticorrosion, low carbonous
H.S CODE:8515800090
Model:SD-300TP-5, SD-500TP-5

Benefits:

* Improves weld quality through a stiffer more controllable arc
* Reduces cost through reduction in weld "cutting" defects
* Reduces welding times
* Narrower weld with greater penetration at any given electrical current setting
* More desirable Heat Affected Zone (HAZ)
* Reduces dependency on operator's skills
* Expands the capabilities for joining thicker materials with relatively low heat inputs.

The Ternary-Gas Plasma Arc Welding (TGPAW) torch functions by utilizing three gases: a primary inert plasma, a secondary inert plasma gas, and an inert shielding gas.

The Primary inert plasma is directed through the body of the welding torch and out of the body across the tip of a welding electrode disposed at the forward end of the body.

The Second plasma is disposed for flow through a longitudinal bore in the electrode. The thickness of metals (ferrous and non-ferrous) with less total heat

The Third inert plasma is "shield" that is directed through the torch body for circulating around the head of the torch adjacent to the . The following diagram illustrates ternary system.

Hazard: Steel Plate cut by Handheld cutting torch is left with a rough uneven edge that must be ground to fit in place. This need to grind the edge results in exposure to hand arm vibration and the possibility of getting foreign bodies in the eyes.

Solution: A smooth edge can be cut in steel plate see plate on using numerical control plasma cutting machines. The resulting smooth edges minimize or eliminate the need to grind the edge smooth.

Projection Welder -Seam Welder

Gas Welders:

Make the weld by guiding the arc, with its intense heat, along the edges of the metals to be joinedSelect proper types of welding torch tip according to the metal and the job being done.

* Gas welding torches
* Gas shielded arc equipment
* Arc welding torches
* Blueprints and templates
* Submerged arc welding equipment
* Clamps and calipers
* Rules, squares, and hand tools

You Should Prefer:

•ARC WELDERS join metal parts using electric Arc welding equipment.
•PRODUCTION LINE WELDERS join metal parts on production lines, using pipes lines or gas equipments.
•GAS WELDERS join metal parts together using gas Welding equipment and combine their own techniques in the parts .
•EXPERIMENTAL WELDERS analyze engineering data and weld experimental parts to determine the most effective welding process, using various Welding methods and Equipment.

Standard Features:

The work of arc, plasma, and flame cutters is closely related to that of welders. However, instead of joining metals, cutters use the heat from burning gases or an electric arc to cut and trim metal objects to specific dimensions.

Cutters also dismantle large objects, such as ships, railroad cars, automobiles or aircraft. Some operate and monitor cutting machines similar to those used by welding machine operators.

Welders often work in a variety of awkward positions, having to make welds while bending, stooping, or working overhead. In some settings, however, working conditions are much better and there are few hazards or discomforts. Overtime is sometimes necessary to complete special projects.

Occupational Exposure Limits for Manganese

Agency : Occupational Exposure Limit
NIOSH REL : 1 mg/m3 (TWA) and 3 mg/m3 (STEL)
NIOSH IDLH : 500 mg/m3
OSHA PEL : 5 mg/m3 (ceiling)
ACGIH TLV : 0.2 mg/m
IDLH: immediately dangerous to life and health concentration
PEL : permissible exposure limit
REL : recommended exposure limit
STEL: short-term exposure limit
TLV : threshold limit value
TWA : time-weighted

Equipments Used By Welding Process:

* Servicing and installation must only be undertaken by a qualified licensed electrician. Never tamper with electrical supply circuits or systems. The welder is only responsible for making connections in the welding circuit and for setting external welding machine controls.

* Equipment should be well maintained and checked regularly, particularly the insulation and connections on work return leads and holders.

* Electrodes or welding wire should never be touched with bare hands when in the holder or welding gun. Holders or welding guns should never be held under the armpits. Remember, hot work increases risk due to the reduced skin resistance when sweating occurs.

egulations (Standards - 29 CFR) - Table of Contents

• Part Number: 1910
• Part Title: Occupational Safety and Health Standards
• Subpart: Q
• Subpart: Welding, Cutting, and Brazing
• Standard No: 1910.254
• Title: Arc welding and cutting.

1910.254(a)

General -

1910.254(a)(1)

Equipment selection Welding equipment shall be chosen for safe application to the work to be done as specified in paragraph (b) of this section.

1910.254(a)(2)

Installation Welding equipment shall be installed safely as specified by paragraph (c) of this section

* The arc - the temperature can reach 6000 degrees celsius. The intense ultraviolet and infra-red rays can be harmful to both the welder and anyone else nearby.

* The electrical circuit - the electrical circuit is perhaps the greatest hazard to the welder. The risk of electrical shock is high and welders should note the following points:

o Never attempt to change welding cables before switching off the power.
o Always install the welding machine as near as possible to the power point.
o Always keep the welding machine terminals and cable connections clean.
o Work on a well insulated floor wherever possible.
o Always wear dry gloves when Handling equipment that is live.
o Always get a qualified electrician to do any electrical repairs.

Kempler Industries