Electric scissors for metal: everything is like clockwork

Cutting sheet metal using hand-held scissors or a grinder is a difficult, labor-consuming and traumatic process, but the greatest difficulties arise when processing corrugated and shaped metal products. And if they are also located in inaccessible places, then it is almost impossible to perform any operation. Without problems, electric scissors for metal will help to cope with any task. This article will tell you how they are, how they differ, how they function, and what you need to consider when choosing a tool.

Design features of metal shears for metal

Externally, electric scissors for metal resemble a small angle grinder (grinder). Compact models have a narrow oblong-shaped case, conveniently located in the hand. Larger and more powerful options are more difficult to grasp with the palm of your hand, so they are equipped with a remote handle. For the manufacture of the body of electric shears, shock-resistant structural ABS plastic is used.

Inside the plastic tool body is an electric motor, and in the front there is a multi-stage gearbox in a metal casing. In this unit, the rotational movement of the spindle is converted into reciprocating, as a result of which the cutting equipment is driven. The working unit works on the principle of a manual mechanical tool: it includes static and movable elements in its design, when passing between them, the sheet metal is cut.

Electric scissors for metal differ in the way the material is deformed - there are knife models that cut the canvas like household scissors, slotted and punching machines resembling a clerical hole punch with their work.

The working bodies of various types of electric shears for metal:

The advantages of electric scissors for metal

We will talk about the functional features of specific modifications of electric scissors later, but now I would like to dwell on the advantages inherent in all these devices. So:

• in comparison with manual scissors for metal, the appliance does not require special physical efforts, because the cutting or cutting process is performed automatically;
• for the same reason, productivity increases significantly;
• electric shears for metal can be used for cutting rather thick (up to 5 mm) metal elements, as well as for working with non-ferrous alloys, polymers and composite materials, the processing of which, of course, is not possible for a hand tool;
• with a power tool of this type, it is possible to easily cut not only smooth sheet metal, but also profile products (for example, metal tile, corrugated board, etc.);
• ergonomic design of electric shears allows to produce complex curved parts, including and by templates;
• Thanks to the sharp cutting element and high speed, the cut is accurate and clean;
• during the cutting process, the workpiece is not deformed or damaged;
• the safe design of the instrument and the absence of the need for direct tactile contact with a metal product nullifies the risk of injury during operation.

Types and modifications of electric shears for metal

There are three main types of electric shears, differing in their functional purpose, design and principle of operation. So all models are divided into sheet, slotted and die cut modifications. Next, we consider in detail the features of each species.

Sheet Scissors

According to its design features and the principle of operation, this tool most closely resembles household scissors. On a rigid support element of a horseshoe-shaped in the horizontal plane fixed static knife. In the perpendicular (vertical) plane, a movable knife works through reciprocating movements. By reinstalling the support platform, you can adjust the gap between the upper and lower knives, adjusting the electric shears to work with material of a certain thickness.

Slotted electric shears

This modification also has a pair of knives in its design. One of them is fixed on top, it is fixed, has a U-shape and two cutting edges. The lower knife performs reciprocating movements in a vertical position, going into the groove of the fixed upper element of the electric shears. When cutting, thin spiral chips are formed. The function of adjusting the gap between the knives is also available here, which allows you to adapt the device to the thickness of a particular metal sheet.

In high-quality models, the chips come up and to the side, without interfering with the review and without causing damage to the workpiece. Chips are periodically cut with special nippers.

Nibblers

Scissors for metal electric nibblers are essentially a miniature punching press that can be manually moved around the web in a given direction. The design of this equipment includes the same elements as the stationary metalworking equipment - a matrix and a punch.

The matrix is ​​a static element of a square or round shape, fixed in the matrix holder. The punch acts as a punch, which is a movable part of the equipment. It is mounted in a slider that performs reciprocating movements transmitted by the crank mechanism. The shape of the punch is fully consistent with the shape of the matrix.If it is necessary to replace one of the elements, they are changed in pairs.

Round cutting elements are designed to work with thin sheet materials (up to 3 mm), and square - for thicker workpieces. The die and punch have a stepless 360-degree rotation function, which makes it easy to make curved cuts. To make it easier to reach very hard-to-reach areas, the matrix can be fixed with an angular interval of 90º.

During the operation of die cutting machines, the punch cuts holes in the metal sheet, from which a continuous path is formed, with a width equal to the diameter of the punch.

Some variety of nibbling scissors are nibbling shears for corrugated sheets with high trapezoidal corrugation.

How to choose a metal shears for metal

And now let's talk about how to choose electric shears for metal. First of all, it is necessary to determine the specifics of the prevailing work. According to experienced craftsmen who used different types of electric shears in their practice, the most versatile are cut-off machines, namely sheet models. For example, for installation of ventilation - this is ideal. Slotted electric shears can be classified as cutting tools. They are excellent for working with thin sheet steel in hard-to-reach places, for example, for carrying out body repairs. Vysechnye models are convenient to use when carrying out roofing works, since they do an excellent job with sharp relief surfaces - corrugated board, metal tiles, corrugations, etc.

However, when choosing, it is worthwhile to focus not only on the nature of future work, but also on the technical characteristics, as well as the capabilities of the tool itself.

Type of food

There are battery and network models. For example, for roofing the main factor is mobility, as It is not possible to connect the car to the network on the roof. Plus, there is no risk of cord damage to the cord on the sharp edges of the roof elements. However, it should be noted that mobile electric shears have restrictions on power and operating time. Using a battery-powered device, you can cut a steel sheet with a maximum thickness of 1.5 mm, and the total cut area per charge will be, at best, 70 m. When choosing a mobile model, you should pay attention to the number of spare batteries and their charging speed.

Engine performance

The power of the average electric shears can not be called high - it varies between 300-650 W. Naturally, this indicator affects the productivity of the electric shears and their ability to cope with a certain metal thickness. When choosing a more powerful tool, it should be noted that it will have a solid mass and a larger turning radius due to the size of the knives. The choice in this case will depend on your needs.

Cutting Frequency

The speed and “purity” of the process of cutting metal parts will depend on this criterion.The higher the speed of the electric shears, the more accurate the cut line. As a rule, light, but not particularly powerful tools, work quickly and cleanly, and high-torque units are slower and more inaccurate. When comparing the stroke frequency, one should take into account the parameters of indicators of the same type of models, i.e. sheet - with sheet, die-cutting - with die-cutting devices. The best option is electric scissors, which have a function to adjust the stroke frequency, which allows you to adapt the tool to certain conditions and specific characteristics of materials.

The indicator of the maximum thickness of the metal

This characteristic is determined by the output power of the electric shears and their design features. Attention should be paid to indicators such as the stroke length of the cutting element in order to determine the maximum thickness of the metal to be cut, as well as the category of metal that can be worked with (mild steel, hard steel, aluminum).

Maneuverability

Here, the main indicator is the turning radius of the tool. Almost all manufacturers indicate the minimum radius in the passports for electric shears, however, many models significantly exceed this limit. Do not forget that sheet machines can only start sawing from the edge of the sheet, with slotted ones it is convenient to work in narrow sections, and punching machines are distinguished by the ability to rotate 360º around their axis and perfectly cope with profiled products.

Ergonomics

Electric scissors for metal are designed to be held with one hand so that the workpiece can be fixed with the second hand. In this regard, the shape and execution of the machine body (thickness, the presence of corrugations and overlays) are of great importance. However, the ability to hold the device with both hands when performing certain operations is also important, so you should pay attention to whether there is a removable handle in the kit.

Launcher Option

The main requirement is the ability to lock the switch in operating mode. You should also check if the switch “knocks out” during vibration. The location of the button is also an important criterion. It should be located in such a place on the case that it was convenient to reach it with your fingers, but the possibility of accidental pressing was excluded.

Traumatic protection

It is recommended to choose models equipped with a special shield plate designed to protect the user's hands. By the way, this option is not provided in every device, although it is very important to ensure safe operation.

 

Cutting Functionality Level

When choosing a tool, take an interest in the range of adjustment of the distance between the knives and whether such a function is provided at all. In addition, evaluate how easy it is to replace cutting equipment (knives, die, punch). Ask if the electric shears are equipped with spare equipment, and if not, is it possible to purchase it yourself, as well as whether similar components from other manufacturers are suitable.

The choice of electric scissors for metal, depending on the work performed

Edge Processing, Trimming
Straight cuts →	High quality cut edges →	Shears
	Poor edge quality →	Nibblers
	High cutting speed →	Shears
	Low cutting speed →	Carved scissors
	High feed force →	Shears
	Low feed force →	Nibblers
Curved cuts →	External Curves →	Shears
	Inner curves, large radii →	Nibblers
	Inner curves, small radii →
Separation cut of metal sheets
Straight cuts →	Thin metal sheets →	Slotted scissors
	Thin and thick metal sheets →	Nibblers
Curved cuts →	Thin and thick metal sheets →	Nibblers
Curved cuts of small radius →	Thin and medium metal sheets →	Nibbler shears
Slots in metal sheets
Curved cuts →	Thin and thick metal →	Nibblers
Curved cuts of small radius →	Thin and medium metal sheets →	Nibbler shears
Cutting profiled sheets
Corrugated sheets →	Nibbling scissors (special matrix), nibbling scissors for trapezoidal profile.
Low Keystone Corrugated Sheets →
High Keystone Sheets →	Nibblers for trapezoidal profile.

How to use electric scissors: detailed instructions

Getting started and first precautions

The blades (punches) are very sharp and move quickly, so you need to handle the tool very carefully. You can’t immediately connect it to the network - first you need to make sure that the “start” button is not activated. If this is not the case, put it in a safe position. Here - only now you can plug in the plug.

Before cutting:

• It is necessary to firmly fix the metal sheet to be cut. Otherwise, he will walk with a shaker, which will ruin the cut line. If it is not possible to firmly fix the sheet, at least press it firmly against a flat surface (for example, a table, workbench).
• To protect eyes and hands, it is necessary to put on gloves with a mask.

Secrets of a flat cut line

To get beautiful and high quality, you need to work carefully and carefully. Especially if you have to deal with such complex materials as a profiled sheet or metal tile.

Here are a few rules that will help you do everything "five":

The distance between the blades of sheet shears and its adjustment

This parameter can be changed not for all types of electric shears, but only for sheet machines. This is necessary when you first cut a thick, and then a thin sheet (or vice versa). Assume that the steel sheet being processed has a thickness of 0.7 millimeters. In this case, the knives should be closer to each other. If the next task is to cut aluminum with a thickness of 2 - 3 millimeters, then the blades will need to be moved apart by an appropriate distance. For adjustment it is necessary to unscrew special screws (adjusting). After setting the desired distance between the knives, the screws should be tightened tightly.

The whole truth about vibration

If the instrument is of high quality, then nothing should vibrate anywhere. And if you feel that vibration is present, then this may indicate a possible malfunction of the device. The second reason for vibration is cutting material that is not suitable for this tool. For example, more dense than permissible. Or corrugated.

In order not to spoil the tool, read its instructions. It describes in detail what materials the scissors can work with, as well as their maximum permissible characteristics (density, for example).

Tips for increasing the durability of electric scissors

Of course, everyone wants the purchased equipment to work as long as possible. In the case of scissors, the following will help this:

	Tip # 1. Timely replacement of cutting blades. By working with a blunt tool, you can very quickly destroy it. And the cut lines will turn out curves, with jagged edges.
	Tip # 2. When working, do not forget to periodically let the device rest so that the heated engine can cool. The instructions say how long the continuous operation can last (usually 10 or 15 minutes).
	Tip # 3. Do not cut where it is too damp or dusty. In the first case, a short circuit may occur, in the second case, the ventilation holes may become clogged (because of which the engine will quickly start to overheat).
	Tip # 4. Having finished work, with a brush it is necessary to clean the ventilation holes and working bodies well, which will keep them sharp for a longer period.

About work safety

The following simple rules will help you not to get injured or break a brand new device:

• Pick up the electric shears before turning them on, inspect them. Check if the bolts holding the blade are loose or if there are any cracks.
• Do not work if the cable or electrical plug is damaged (double insulation is a reliable protection against electric shock, and it must be intact). The power supply in the network must comply with the norm - 220 volts.
• Using cutting scissors or slotted type, take care of the protection of your eyes - put on special glasses. Chips flying out during operation are a dangerous thing. In addition, it is very hot, so do not touch it with your hands. It is better to protect yourself with gloves.
• The cut line turns out as sharp as a knife, so it’s better not to touch it, either - you can cut yourself badly.
• The gear unit may become very hot during cutting. In order not to get a burn, do not touch it in the process of work or immediately after its completion.

Take the survey: