Automatic self-punching: operating principle and device

In working with metal, the master often has to drill holes. During this procedure, the drill bit often slips to the sides, thus creating great inconvenience. This can be prevented by using a device such as an automatic punch.

Standard

A conventional punch is a metalwork tool made in the form of a handle equipped with a rod, for which special tool steel is used. The task of the kerner is to make small indentations in the surface of the metal, into which the drill bit will later be inserted for a manual or electric drill. Specially for the drill, the tip of the punch is equipped with a conical sharpening. The handle of the device is equipped with special notches. They prevent the hand from slipping while working with the tool. According to consumers, the disadvantage of the usual nabernivatelya is that they have to work with two hands (one to hold a hammer, and the other - a punch).

For those who wish to release one hand and make minimum efforts during the work, it is recommended to use an automatic punch. It can be mechanical, spring and electric.

Spring core

A mechanical or spring punch can be operated with one hand. This tool acts due to tight compression and self-release of the special spring.

Inside the body of this tool contains a platoon-trigger mechanism, which affects the piercing and working part of the hooker. The cone-shaped rod performs nakernivanie by using the impact on him striker. He comes into motion after the expansion of the spring.

Tool Benefits

Judging by the feedback of the owners of such products, the spring automatic punch has the following advantages:

• Marking is done with one hand: the percussion tool is not used.
• The master has the ability to control the impact force of a conical rod on a metal surface. This feature, which has an automatic mechanical punch, allows you to calmly handle soft and brittle materials without risking damaging them: the same depth is a characteristic feature for all the holes made by this tool.
• The procedure for marking with a mechanical punch is much faster than the standard procedure.

Electric automatic pivot

The principle of this tool is the use of striker and rod, which come into motion not from the efforts of man, but due to the action of the electric circuit. With the help of a solenoid (inductor) and a short-duration magnetic field created, the drummer, being pulled into the tool body, releases the pincher. He, in turn, has an effect on the rod. As evidenced by numerous customer reviews, using such an automatic punch, you can make at least fifty holes within one minute. As users note, electric cores are rare. This is explained by the fact that these tools have an obsolete design.

Where can I purchase the device?

You can buy a kerner of this or that type in locksmith shops. The tool is also sold in the departments of manual and electrical equipment. The cores have a cylindrical shape and are easy to see on the shelves. Before buying this tool, it is recommended to pay attention to the material of which it is made and who is its manufacturer. In the event that there are no identification marks on the body of the core, experienced craftsmen recommend to abstain from buying this tool.

German manufacturer

Rennsteig manufactures crimping pliers for pressing contacts and percussion instruments. Chisels, chisels, peaks, hammers and punchings made by this company combine high German quality.

Using the automatic puncher Rennsteig, you can easily mark on the marked line. To do this, the tool must be installed in the desired location and press the cap. Kerner itself operates without the use of percussion instruments.

Characteristics

The German product Rennsteig is an automatic punch, the device of which consists of the following elements:

• The case is made of very high quality tool steel. It has a nickel coating.
• Replaceable hardened tip. Its length is 1.25 cm.
• The drummer. Its diameter is 0.14 cm.

Also, the core is equipped with a mechanism for adjusting impacts.

Using this tool, you can mark both ordinary steel and products from any non-ferrous metal.

Automatic self-winding kerner

Wishing to receive the adaptation for markings, but at the same time to save money, or simply lovers of handicrafts can try to make a standard core. For this purpose, a conventional diesel injector, namely its locking needle, which has a high hardness, is suitable. It can be freely supplied with plastic, aluminum, copper, brass, bronze and high-carbon non-hardened tool steels. For those who want to work without the use of hammers, it is better to make a core of automatic duralumin pipes. For work you will need:

• Duralumin pipe with a diameter of 0.12 cm. It will become the hull of the future product.
• Shock-plat mechanism. It is a product in the form of a cone made of strong carbon steel, which is located under the small displacement within the cocking spring.
• Usual spring. It should be located between the striker and the core plug.
• Cover or cap. It performs the function of an emphasis for the trigger spring, which has an effect on the firing pin.
• Bojek. It is not difficult to grind it yourself, using a grinding machine or a Bulgarian.
• Sharpened cone-shaped rod. There can be several. In such a case, if necessary, they can be removed and sharpened in turn during operation.

Progress

It is not difficult to make an automatic core yourself, if you work in stages. The wizard requires the following:

• To make a core of the punch. It is desirable that it has a diameter of 0.4 cm and a length of 4 cm. The working surface must necessarily be hardened.
• A shock-absorbing washer is installed on the shank of the striker. After this action, it is considered ready for use.
• Prepare the shock-trigger mechanism. To do this, the turned part in the form of a cone is installed in the inner part of the spring. Perform this work should be so that its thin part (0.3 cm) the part rests against the end of the striker. Its length can be 3 cm.
• Insert the trigger into the housing of the future tool.
• The upper part of the pipe is closed blindly from the end. For this purpose, the tube is equipped with a thread on which the cap is screwed.

As a result, the self-made core should act as follows:

• The sharpened cone-shaped rod is attached to the intended place for kerfening, after which it should be pressed.
• With his second blunt end, he acts on the trigger mechanism: he pushes the cone-shaped part installed in the spring to the striker.
• As a result of pressing the rod onto the trigger mechanism, it gradually shifts its cone-shaped part more and more from the end, until it hits the center of the striker. He, being under the influence of an ordinary spring, and performs a stroke.

The manufacture of the product can be considered successfully completed if, when pressing the rod at the desired point on the surface, a mark is immediately formed. As evidenced by numerous reviews of owners, homemade punch and core is conveniently stored in chess boards. There for each rod can be made special sections made of foam.

Self-made cores, both conventional and automatic, are the optimal solution for those who only occasionally use this tool.