How To Use Metal Shears

Metal shears are used to cut flat metal materials in straight lines. Metal shears are. Manual, electric, hydraulic or pneumatic. They are operated by pneumatic pressure. In this procedure, the term “shear” refers to manual and powered metal shears. Unless otherwise specified, the term refers to manual and motorized metal shears. Metal shears are widely used in the sheet metal working industry. They can cut steel sheets of various thicknesses.

The machines used are known as squaring shears, electric shears, and guillotines. They can be foot- or hand-operated, mechanical or hydraulic. First, the material is clamped between the posts.

In general, sheet-metal cutting machines can be divided into pedal (human) shears, mechanical shears, hydraulic swing-beam shears, hydraulic guillotine shears, and hydraulic CNC shears.

Hydraulic shears consist of the movement of the upper blade and the fixed blade; the use of rational blade spacing allows cutting forces to be applied to metal sheets of various thicknesses, so as to divide the sheets according to the required size.

Sheet metal shears are often used to cut straight-edge blanks.

The shearing process must ensure that the sheared surface is parallel to the required straight line and minimize sheet distortion to achieve high-quality parts.

Metal cutting shear is a type of forging machinery, mainly applied to the metal processing industry.

The products are widely used in light industry, aviation, shipbuilding, metallurgy, instrumentation, household appliances, stainless steel products, steel structures, and decoration industries.

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Tool safety rules

Observe and comply with all Yale professional or student store rules.
Understand and follow the manufacturer’s operating procedures.
Check the tool for damage before use.
Make sure all guards are in place and properly adjusted.
Do not circumvent safety devices.
Always stay in place while the machine is in operation.
Clean the tool after use.
Any malfunction or damage should be reported to the workshop supervisor after labeling the tool with an “Out of Service” tag. Label the tool with an “Out of Service” tag.
Always keep fingers away from the blade.
For foot-operated manual shears, keep the foot of the person who is not using the shear away from under the footboard.
For foot-operated manual shears, avoid putting the unused foot under the foot pedal.
Do not exceed the capacity of the tool. For hand shears, use an extension bar and never exceed the capacity of the tool.
For crank shears, never exceed the capacity by using an extension bar on the handle for leverage. Similarly.
For foot-operated shears, never exceed the capacity by placing both feet on the stool or jumping on it.
Do not rest both feet on the stool.
Do not cut more than one item to be cut at a time.
If two people are required to work together, communication and responsibility must be
Make sure the following is clear. The helper must signal the operator to turn the shear around. The operator must
Keep an eye on the helper’s position and signal “all clear” before lowering the blade.
Never introduce material through the back of the shear.

Proper setting and use

Make sure the material to be cut is safe and suitable for use of the metal shear.
Check and mark the cutting position of the workpiece to be cut.
Ensure that loose clothing or jewelry is removed or secured and prepared for shearing.

Shearing machine

With the tool secured in the off position, adjust the shear guard so that it is positioned as low as possible and
Position the shear guard as low as possible to allow sufficient space against the workpiece. Make sure that no one is behind the shear, where the cut metal could leak out. Inspect the tool and surroundings for hazards, equipment damage or missing guards.

For electric shears, turn on the shear and give it a test run to check its operation. Insert the workpiece into the shear, align it with the side table guides and slide it until the cutting line is aligned with the shear.

Shearing operation

Fully activate the shearer to complete a cycle. For manual shears, hold the lever with both hands. Operate the lever with both hands from a stable position so that no part of the body is between the lever and the shear plane. Operate the lever from a stable position so that no part of the body is between the lever and the cutting table. For foot-operated models, operate the lever with one foot.

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Maintenance

Always make sure the tool is turned off before performing inspections.
Always make sure the tool is turned off and disconnected before performing any inspections or maintenance.
Never use gasoline, benzene, thinner or alcohol.
Do not use. This may cause discoloration, deformation or cracking.
Doing so may damage the product.
Repair the product to maintain its safety and reliability.
Always inspect and replace carbon brushes and perform other maintenance and adjustment work on the machine.
Be performed by a Makita-designated service center.
Always use Makita replacement parts at an authorized Makita service center.

Use replacement parts

These accessories are not recommended for use with the Makita tools specified in this manual. They are recommended for use with the Makita tools specified in this manual. The use of other accessories and devices may cause injury. There is a risk of using the accessories and devices only for their intended purpose. Use accessories and devices only for their intended purpose.

Assembly instructions

1. Remove the two bolts securing the handle to the frame and reverse the position of the handle.

2. Mounting holes (height position) and secure firmly in place. And the lower position is for tabletop operation. (Lower position for tabletop operation).

3. Operation of the clamping table. Use the vise clamps to the flat part of the board. Secure it to the clamping tabs. Make sure the panel does not move Shearing.

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Classification

Often used in conjunction with other equipment for a special purpose.

Sheet metal cutting machines in cold forming lines: these shears are used in cold bending lines of longitudinal beams of cars, production lines of side baffles of cars, and colored sheet metal forming lines, among others.

Metal shears used in steel structure production lines: mainly used in automatic H-beam production lines to complete the process of cutting angle steel.

Metal shear in open sheet metal line: for sheet metal shearing lines, designed in line with the needs of fast production lines.

Thick sheet metal lines mainly use hydraulic sheet metal cutting machines at high speed, while thin sheet metal lines are usually equipped with pneumatic metal cutting machines. High-speed lines are equipped with flying shears and are characterized by continuous production and high efficiency.

Flat-blade shears

Cutting quality is good and torsional strain is low, but cutting forces are high and power consumption is high. Predominantly mechanical transmission. The cutting edges of the cutting machines, commonly used in rolling mills for shearing billets and hot slabs, are parallel to each other and can be divided into uppercuts and lower cuts depending on the cutting method.

Multipurpose metal shears

Punching and jointing shears (ironworking machines): mainly used in the stamping process to cut profiles and to complete the stamping of sheet metal. Plate bending and cutting machines: the same machine can perform the shearing and bending processes.

Construction of hydraulic metal shears

Frame

Welded sheet steel structure with excellent rigidity and stability. Main components include the left and right uprights, clamping table, working platform and oil tank; the two cylinders are mounted on the support table connecting the two uprights and the table.

Upper blade beam

Constructed of welded triangular steel plates, with guide plates, blades and rear gouging device. The gouging operation is performed by reciprocating motion driven by cylinders on the left and right sides.

Left and right cylinder system

It consists of two piston cylinders and sealing components. This device directly drives the movement of the upper blade.

Hydraulic system

Consists of the main motor, oil pump, valves, oil tank and piping. This is the drive system of the machine.

Clamping device

It consists of a series of cylinders mounted at the front of the machine frame. When oil enters the clamping cylinder, the clamping head overcomes the spring force, pushes down, clamps the sheet metal to be cut, and returns to its original position with the help of the spring force after cutting. The thicker the sheet metal, the greater the clamping force.

Blade gap adjustment device

It consists of an adjusting handle, lever, and dial. The distance can be adjusted according to the thickness of the plate.

Electrical system

It consists of an electrical box installed on the left upright and buttons on the plate section. It is used to operate and control the hydraulic metal shear.

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Conclusion

Manual shearing is usually capable of cutting mild steel plates less than 1/8″ thick by the width of the shear blade.
The width is limited to the width of the shear blade. For material compatibility, refer to the equipment manufacturer’s instructions or Contact the workshop manager. Shears are designed for cutting sheet metal only. When cutting materials other than sheet metal, e.g. round lumber can damage the shear blades.