Reverse hammer metal straightening - how to make yourself and how to apply for appointment

Contact tool crumpled body of a couple of millimeters, but this is enough to level a dent

None auto repair shop or body repair shops can not do without a slide hammer or similar devices. I'll talk about what a reverse hammer, how they work and how to raise their hands. I am confident that this tool will take its place on the shelf in your garage and will be useful for car repairs.

All you need to know about the tool

To correct a dent, it is necessary to remove the entire bumper, but it is long and difficult - much faster and more convenient to pull out the plastic

If the automobile body appeared dent, then it's time to buy a hammer or a reverse to make it with their own hands. After all, this tool will help to align the metal surface to its original condition.

This tool - a kind of hammer, which strikes not as chipping, and from the surface by pulling it toward you. The apparatus is extremely simple tool - the weight along the rod moves freely, and a rod fitted with a handle.

The drawing shows the basic elements of the design straightening hammer - blue arrow denotes movement of the weight

The rod is made of a metal rod or a thick-walled metal tube 2 cm in diameter and 50-80 cm in length. Kettlebell - a cylinder with a length of 15-20 cm and a weight of 300-500 grams. It passes through the cylinder through-hole through which the rod moves freely.

• At one end of the rod is rigidly fixed handle. The handle is made of metal or on metal guard is provided, which accounts for the impact force;
• At the opposite end of the handle is located or sucker tip for spot welding. Despite the simplicity of the tool, the price of devices starts at 2 thousand. rubles (prices are relevant for the spring of 2017).

Why not an ordinary hammer hammer is used for straightening body parts, namely a return? Given the nature of dent damage, defect can be eliminated, exerting mechanical force on the metal in the desired direction. Get for damaged body parts to dislodge it in the opposite direction, it is impossible.

Choosing a shock device on a damaged metal body parts can be pulled out easily and quickly. Moreover, the body parts do not even have to take off, as all the work can be done directly on the machine.

drum brake assembly disassembly - is not an easy task as you try not to use a reverse hammer spotter.

An alternative method of application of the tool - the removal of the brake drum with soured studs. Another tool here is not to approach, and welded back action hammer or by screwing it bolt, the dismantling can be simply and quickly.

Varieties of tool according to the surface mounting method

illustrations	Types and descriptions
	Pneumatic - with a vacuum hook. Vacuum reverse hammer suitable for alignment with minimal damage to the paintwork.
	For spot welding Spotters. This reverse hammer is designed to work with a pre-Bare metal which can be welded to the metal rod. Have a hammer for car repairs, is directly connected to the spotter, and there are devices that need a separate welding machine. Unlike the use of pneumatic tools, paint coating must be removed before the metal.
	With the auxiliary nozzles. Such a device is used for alignment with use of special washers. Washer welded to the metal and in which threaded fastening hook or comb.
	Kit with adhesive pads. This reverse hammer avoids the spot welding, as laths, to which is attached trailer, glued fast cyanoacrylate adhesive. After unevenness is eliminated, it is cut plate. Device - a good choice for the home studio, where a small number of repairs and a few pads last long.

As the device is working

illustrations	Description of action
	surface preparation. The damaged body surface is treated with a wire brush on a grinder, until the complete removal of ink. After removal of the rough metal skins of large sandpaper. Before you start working on the spotter body, be sure to remove the negative terminal of the battery!
	Pulling metal. Trailer tool set at the beginning of the dent, that is, where the metal is just beginning to pull away. You've got to put a mark and grab a trailer spot welding. Dye metal to cool, and then hit the weights with a force on the handle. Repeat strokes as long as the metal does not vygnetsya. Break off or cut off trailer welded and welds it again 1-2 cm down the dent, and continue pulling.
	metal Scraping. Once all dent stretched, grinder we clean the protrusions of spot welding. Regularly putting a broad spatula or line, and further if necessary, remove protrusions.
	The use of a hammer-spotter. Here everything is easier - electric limit switch is applied to the metal on the handle button is pressed and it is possible to strike. Metal drawing end, body member also need to clean up from the welding relief.

How to make the most out of scrap materials

illustrations	assembly instruction
	Prepare materials. Cut a piece of 15 mm diameter rod 70 cm long; 5 pieces of the same rod length of 15 cm.
	cook the weight. On top of the long rod wound into multiple layers of tape and, as shown in the photos, lay out short pruning. Short pruning rod temporarily rewind tape, and then connect the welding. After a long rod will be removed tape, homemade shipment will go in both directions.
	Set the weight limiter. On the opposite end is attached load limiter - in combination handle.
	Threaded under mounting attachments. At one end of the long pin is threaded for attachment lugs. When a reverse hammer with his hands will be made, lugs (hook or sucker peak) can be screwed through the long nut.

To summarize

Now that you know how to do a reverse hammer with a suction cup with their hands out of scrap materials. Also recommended for viewing video in this article, where you can see the thematic details. Questions you can ask in the comments.