Production of cold forging. Cold forging and photos of product samples

Admiring the beauty of an openwork metal fence or admiring the incredible twisted pattern on the railing of an iron staircase, few people think that they are made by cold forging. You can learn to embody beauty in metal without much effort. To do this, it is enough to have minimal skills in working with metal and have special machines for cold forging.
What is cold forging? What machines are needed for it? What can be made on these machines? You will find answers to these questions in our article.

It would be more correct to call cold forging - mechanical bending of a metal rod on specialized machines to give it the shape conceived by the manufacturer. The bending of the rods in the machine can be done either manually using levers or using electric motors. In addition to metal rod, cold forging can bend small diameter pipes, narrow iron strips and fittings. Using the cold forging method, the following are produced:

• Twisted fences.
• Decorations for residential buildings.
• Patterned gate.
• Railings for balconies and stairs.
• Metal garden benches.
• Decorations for gazebos and lanterns.
• Lots of grid options.

Elements made by cold forging

Having mastered the method of cold forging, you can easily start your own business for the production of metal products. At the same time, you will only need initial financial investments for the purchase of machines, and if you make machines yourself, you can get by with minimal costs.

Below we will give you instructions for self-assembly of cold forging machines.

Machine "snail"

The manufacture of a snail machine is one example of self-design, while giving advice with an exact indication of the dimensions of all parts does not make sense. You need to focus on your idea of ​​​​the operation of the machine, how and what will bend, how many turns of the spiral will be enough for high-quality work, what size the lever with the tabletop will be. If you understand the essence of the manufacturing process of the machine, then the assembly itself will not cause any particular difficulties.

Machine "snail"

Manufacturing of the main components of the machine

Frame.

The process of bending an iron rod exposes the machine to heavy loads, therefore, in the manufacture of a frame for a “snail”, only a metal corner, a channel or a thick-walled pipe is used. Do not make a frame of wooden beams, such a table cannot withstand prolonged loads and collapses.

Tabletop.

The tabletop for the "snail" is made of a metal plate cut in the shape of a circle, at least 4 mm thick. From the same plate, a second countertop is cut out, repeating the shape of the first. Segments of the cochlea will be placed on the second tabletop and the products will be bent. During the cold forging process, the countertop takes on the bulk of the load, so there is no need to save money and make it from a thinner sheet of iron.

Main shaft and lever.

The main shaft is centered between the tabletops and is attached to the base with four right triangles. The shaft can be made from a thick-walled pipe of the desired diameter.
The lever is attached to the shaft with a ring and rotates around it, in addition, a roller is installed on the lever for bending the rods on the top tabletop.

Machine diagram

Marking and installation of attachments

Depending on whether you want to produce only the same type of samples or you need more artistic products, there are three options for the “snail” device.
Option number 1.
This is the simplest of the three options, its essence is that a spiral outline is drawn on the countertop.

Drawing segments "snail"

At its core, this is a drawing of future products that you will produce on the machine. After drawing the scheme, it is enough to cut out several segments from thick strips of iron of different widths, repeating the line of the drawing and weld them to the table top according to the markup. On such a static "snail" you can make the simplest bends.
Option number 2.
The second option is the most popular among home-made machines; it involves the manufacture of a collapsible snail from removable parts. Holes are drilled along the marking contours, in which threads are cut. Further, templates for stop segments are made from cardboard or plywood and overlays are made of metal on them. Finally, holes are drilled in the overlays, which must match with the mounting sockets on the table top. To fix the segments, bolts are mainly used, but you can also make cylindrical stops. This design of the "snail" will allow the production of spiral workpieces with different radii on one machine.

"Snail" from strips of metal

Option number 3.
In the third version, instead of collapsible stop segments, several removable modules are made with different versions of the snail, which change as needed. The module is made of a piece of iron on which segments repeating parts of the spiral are welded.

Snail modules

Machine assembly.

1. Install the frame in a place where you will have free access to the machine from all sides.
2. Concrete the legs of the frame in the floor or fix the frame in another available way.
3. Weld the main countertop to the frame.
4. Install the main shaft by welding it to the tabletop and reinforcing it with triangles.
5. Slide the rotating lever onto the shaft.
6. Install the top table by welding it to the main shaft.
7. Place the snail segments on the tabletop.

After assembly, carry out a test bending of the rod.
To learn more about assembling a snail cold forging machine, check out the video:

Torsion machine

This machine is designed for uniaxial longitudinal twisting of a workpiece from a bar of transverse or square shape.

Torsion machine

For the base of the torsion machine, a channel or an I-beam is used. A thick iron strip is attached to it by welding, on which a vice is installed to clamp the fixed part of the rod. The vise is fixed with four bolts with a diameter of M16 or more. To increase the strength of the clamping of the bar, corrugated plates made of sheet steel are welded onto the vise. On the opposite side of the base, guide rollers are installed, to which a clamping unit for the movable part of the workpiece is attached. It is made of a steel sleeve, in which it is necessary to provide holes for clamping bolts located at an angle of 120 degrees. The bolts must have a flat end and be made of high quality steel. Both clamping devices must be aligned, for this they must be checked with a level, bench square and caliper.

Types of machines

Next, you need to make a handle for turning the movable part of the clamp. Its lever should hit as long as possible to reduce the applied force. The handle itself is best done with a rubber bushing to prevent slipping of the hand during operation.
After the complete assembly of the machine, it is checked for the reliability of the moving elements and the accuracy of the deformation of the bar. After checking, the machine is attached to the support frame.

A simple model of a torsion bar

How to make a torsion machine with your own hands, see the video:

Machine "Gnutik"

In order to qualitatively form an angle in a product produced by cold forging, you will need a machine called a “bend”. It consists of a steel plate with a movable stop on which there are two support shafts and a lever.

Machine "Gnik"

The workpiece is placed between the wedge and the support shafts. After that, with the help of a lever, the wedge is shifted towards the shafts, which leads to the bending of the workpiece.

Computer model of the machine

It is quite simple to make such a machine, the main thing is to follow the given drawing and use tool steel, since during operation a large load is applied to the part of the device.
You can also watch how to make a “gnick” machine in the video:

Machine "wave"

It is more correct to call this machine - a controlled wave. The equipment of the machine consists of a pair of steel discs with a diameter of 140 mm, which are bolted to the worktop. The axis of rotation of the universal wrench is fixed on the drive disk.

Machine "wave"

Wave control occurs as a result of changing the distance between the disks. When the bar is rolled around the drive disk, a pattern is formed, after that, the bar is removed from the conductor and a pattern is formed on the other side.
You can watch the machine in action in the video below:

Machine - press

A press is needed to form the tips of the rods. This machine works on the principle of a flywheel, at the beginning, by rotating the bar with weights, the screw head is pulled back until it stops. After that, a replaceable stamp is inserted into the socket and the workpiece is placed. Next, quickly spin the bar in the opposite direction and leave it to rotate freely. In conclusion, the striker strongly hits the die shank, due to this, a force sufficient for stamping is developed.

rolling press

As for the manual rolling mill, you can make it yourself, but you still have to order - special steel rolls, bearing bushes and shafts, and buy gears in a store. Only goose foot and sheet tips can be made on such a machine.

Connecting and painting parts

Elements produced by cold forging are connected in two ways:

• Welding - the parts are welded to each other, and the scale is ground off with a grinder or other grinder.
• Clamps - this type of connection looks much more beautiful. For clamps, stamped strips of metal with a thickness of 1.5 mm or more are used.

Finished products are painted with blacksmith enamels or acrylic-based paints for metal.

Connections of parts by welding

Products made by cold forging

We invite you to familiarize yourself with the options for products that you can make using the cold forging method:

• The fence element is completely made according to the cold forging method. Clamps are used to connect parts. For the manufacture, the following machines were used: "snail", torsion, "gnut" and "flashlight".

• Soda bench - made by cold forging and sheathed with wood. Welding and clamps were used to connect the elements. Machine tools were used in the manufacture - "snail", torsion bar, press.

• Balcony railings - production method - cold forging. The elements of the railing are connected by welding and clamps. Used machines in the production - "wave", "snail", press.

• Stair railings - produced by the method of cold artistic forging. The parts are connected by welding. In production, machines were used - torsion, "flashlight", "snail".

• Peak - the frame of the visor is made by cold forging. The parts are connected by welding. In the manufacturing process, machines were used - "snail", "wave", press.

• Brazier - a simple design made by the method of cold forging. Clamps and welds were used to connect the parts. Barbecue elements were made on machines - torsion bar, "snail".

• Double bed - for the backs, the method of cold forging is used. Connections are made by welding and clamps. In the manufacturing process, machines were used - "snail", "wave" and a press.

As can be seen from all of the above, the cold forging method does not require large financial costs and is quite easy to learn, so if you decided to start learning blacksmithing with this particular method, then you did the right thing.

We live in an age of rapidly developing technology. And gradually, folk crafts and crafts are being squeezed out of our lives. And, perhaps, forging is almost the only craft that not only has not disappeared in the course of technological progress, but, on the contrary, has recently become more and more popular. What is the reason? In demand. Now forging is firmly connected with the design of residential premises and offices, with garden and park design. With the growing number of suburban and summer cottages, which are hard to imagine without wrought iron gates and gazebos. Forging is still in demand in the funeral business.

Forging is not only large outdoor items, but also items that decorate interiors of different styles.

Forging is a synthesis of craft and art, making each item unique.

And so now the business of manufacturing forged products is very promising.

What to choose: cold and hot forging?

Hot forging is an ancient blacksmith's craft. Since ancient times, in forges throughout Russia, iron was heated on fire, and then the craftsmen gave the softened metal the desired shape.

With such forging, a lot of time and effort is expended, but products forged in this way are truly unique.

Today there is a more modern version of metal processing - cold forging. Basically, when creating a product, ready-made forged elements are used. This is a less labor-intensive method for the master and cheaper for the customer.

It is not easy to compare two types of forging. Hot forging - uniqueness and elegance, cold forging - durability and reliability.

Imagine the situation: you decided to create a business for the manufacture of forged products. First question: what kind of forging to do? Hot forging requires, first of all, craftsmanship and skills. And this takes time. Therefore, having really looked at things, we will first turn to cold forging and gradually begin to create a business.

Sales market and competition

Any production is focused on the consumer. Therefore, you first need to study the demand for forged products in your area. Are there cottage settlements nearby, individual construction, are orders from the municipality possible?

Get to know your competitors, real and possible. These are not only business colleagues, but the production of this direction, located nearby. Forge shops, which are now opening large metallurgical enterprises; imported Turkish forged products, very cheap compared to custom-made ones made in a small workshop; products from Europe, which are more expensive than Turkish ones, but also in demand.

Even a funeral agency with its own small workshop producing monuments and fences will also be in competition.

The creation of paving slabs is more relevant today than ever: more and more people want to ennoble the appearance of their garden, yard and just the local area. Read in our how to realize yourself in this business.

Fundamentals of the betting business:

We start production

Exists standard product list, with which all blacksmiths begin:

• openwork lattices and gates;
• fences of all types and purposes;
• visors for porches;
• garden furniture and gazebos;
• bars on the windows;
• fireplace accessories and so on.

Over time, you can switch to the production of exclusive products. This requires experience and availability of individual orders. For example:

• knightly armor in the interior of a country house;
• unusual lamps (garden and indoor);
• details for furniture, etc.

Video: do-it-yourself metal forging as an art

Forged elements with their own hands: where without advertising?

Every business, big or small, needs advertising.

You can use local media for this purpose by posting photos of products, your interviews, customer reviews, a large article about your business there.

Use the Internet. For example, at least just post ads on Avito.

Many large and small cities on the City Day hold festivals of folk crafts, including blacksmiths. (For example, every year in August, such festivals are held in the ancient city of Ustyuzhna, Vologda Oblast, where blacksmiths even come from abroad).

Profitability of the blacksmith business

Let's take as a basis the situation that you made the first trial product in your garage and have not yet registered as an entrepreneur:

• a set of the most necessary equipment for cold forging - 400 thousand rubles.

Now let's calculate the cost of producing 1 meter of garden trellis 2 m high:

• metal - 500 rubles;
• Anti-corrosion coating - 15 rubles;
• electrodes - 20 rubles;
• electricity -100 rubles;
• miscellaneous expenses - 400 rubles.

Total 1035 rubles.

One meter of forged product costs on average from 3000 and more.

It will take more time if you have built a workshop. But this is already a more serious investment in business.

Paperwork

Creating any business starts with. Without it, it is impossible to issue the relevant documents. In many regions of the country, a good business plan can be obtained.

Further registration must be carried out in accordance with the law “On State Registration of Legal Entities and Individual Entrepreneurs of August 8, 2001 No. 129-FZ”.

Metal forging ── is a promising line of business, and with the right organization, it will flourish successfully.

Recently, forged metal products have become widespread in our country: lattices, fences, figured gates, balcony frames, etc. Previously, these products were made by forging, which meant knowledge of the forging process, the presence of a special workshop and special equipment. tools, etc.

But in our time, everything has changed ... The old technology has been replaced by a new one ... "EISENKRAFT" technology. This technology makes it possible to produce products under the "antique" without forging and at home.

In order to start this type of business, you need to have professional tools for artistic bending of metal "for forging". The use of professional tools and technology "EISENKRAFT" has certain properties:

Minimum initial investment in, minimum costs to maintain business in the future;

Payback approximately 1 month;

It is not necessary to heat the metal to obtain beautiful "forging" products;

Production can be carried out in any room (garage, barn);

Mobility - if necessary, production can be moved to another place within a day;

Availability in the labor market of an inexpensive and skilled labor force with sufficient skills in working with metal;

Affordable locally produced raw materials: hot-rolled steel sheet, square, circle and modern technology for their processing on tools into products that are in stable consumer demand.

Working with this equipment is quite simple. We insert, for example, a square rod into a device for longitudinal twisting, make a couple of movements and ... at the output we have a twisted square rod ...

Beautiful… Durable… Easy…

In addition to the equipment listed above, it will be necessary to purchase a welding machine and a puncher. These tools are needed during the installation and installation of metal fences.

In order to get started, you need:

1. To have tools for the manufacture of forged-bent gratings using the "EISENKRAFT" technology and tools for mounting gratings, etc.

They mainly offer ready-made equipment, the cost of which ranges from 800 USD. up to 3500 USD In my experience, machines for the manufacture of forged-bent gratings can be made at any factory or in any workshop where there is a turning, milling and drilling, as well as a metal hardening furnace. The cost of manufacturing is 150-200 USD. depending on the region.

I offer drawings for the manufacture of this equipment. The cost of a package of drawings is 70 USD.

The package of drawings includes drawings for four machines:

UNIVERSAL MACHINE FOR CUTTING, RIVETING, BENDING TO A GIVEN ANGLE
MACHINE FOR MANUFACTURING BULBS AND TWISTING "SCREW"
MACHINE FOR MANUFACTURING SPIRALS
MANUAL PRESS (DENTATION OF VARIOUS FORGING ELEMENTS)

These machines can do the following:

1. strip cut to size;

2. punching holes for rivets;

3. bending circles of different diameters;

4. bending to a given angle;

5. riveting (hammer is not needed);

6. production of spirals, curls with different pitches;

7. screw twisting square and strip;

8. making so-called cones;

9. applying dents of various configurations to the edges of a strip and a square (forging elements).

All products are made from a strip up to 40 mm wide, up to 5 mm thick. and squares of different sizes from 5*5 to 12*12. Welding is needed in minimal volumes, since all the main filling elements are connected with rivets, which greatly speeds up the speed of manufacturing gratings and fences. For example, for the manufacture of 1 sq.m. grating MASTER needs about 15 minutes.

If you are interested in my proposal, I look forward to your letters.

I will answer all questions, for a sample I will send a couple of drawings and video clips of the machines.

A few more articles from the section "

Architects and designers often use forged elements in their work. Openwork metal grates covering fireplaces, or beautiful balusters on the stairs look elegant and noble.

If you know how to perform forging and learn this craft, you can create original products yourself.

This activity is suitable for everyone who likes to do physical work and who is ready to get acquainted with the technology and features of the choice of metal.

What do you need to know about forging?

Forging is a process of processing a special workpiece. Its purpose is to give the metal the required dimensions with a shape. There are hot forging and cold forging.

The master needs to get acquainted with both varieties in order to know the advantages and disadvantages of each.

Hot forging method

In the hot method, the metal workpiece is strongly heated. As a result, the metal becomes plastic. Hot forging gives the workpiece the desired dimensions and desired shape. A variety of work options are available to the master.

Heating a metal workpiece has its drawbacks. First of all, it is necessary to equip a special room. You will need to buy a forge, for which you will have to buy fuel.

Fire safety rules must be observed, it is important that the master knows how to work with fire.

Knowing the temperature conditions used in the forging process, you can easily select the desired type of forging.

Cold forging method

Cold forging is a labor intensive process. To achieve the desired shape from a metal blank, it is bent, pressed and welded. The execution technique is a little simpler compared to the hot method.

The workshop does not require a lot of space, and for its arrangement you do not need to purchase a special forge, it is enough to buy a forging machine.

The process of manufacturing a product involves working with semi-finished products. Once a mistake has been made, it cannot be corrected.

Choosing a metal

Metals with certain properties are suitable for hand forging. The more ductile the metal, the easier it is to change its shape. However, plasticity is inextricably linked with strength.

An increase in one characteristic inevitably entails a decrease in another. When buying a workpiece, the master must know exactly what composition it has.

Decorative forging elements are made from copper, steel, duralumin or brass. In addition, alloys may also be used. Information about metals that can be easily forged can be found in the Steel and Alloys Grader.

What tools are needed for forging?

Inventory varies depending on the forging method. A blacksmith's forge with an anvil, hammers with tongs will be needed for hot forging.

For the cold method, you need the Gnutik tool, which allows you to bend the workpiece at an angle, and the Snail forging machine, which you can do yourself. The last machine allows you to create decorative elements with a spiral shape.

Note!

In addition to the basic tools for the cold method, Flashlight, Wave, Twister, ring machine and others can be additionally used.

The modern market offers industrial machines designed to perform technological operations. In the forging photo you can see the product made on the Master 2 machine from MAH.

Hand forged

In order for the workpiece to acquire the desired shape, the master must use different techniques and methods in his work. You will need to acquire various tools and master different technologies.

The cold forging method does not require much effort from the master. The following stages are distinguished in the work:

• creating a drawing or sketching a decorative element;
• procurement of blanks;
• forging process.

Today, a drawing can be done using a computer program on your own or ordered by professionals. The project will allow you to calculate how much metal blanks you need to purchase before starting work.

Note!

The main forged elements are represented by the following groups:

• Paws. The end of the metal rod is given a certain shape.
• curls. The ends of the rod can be bent in one or two directions.
• Rings. Decor elements are made of rods with a square or round section.
• Torsion. It is characterized by helical twisting along the axis.

3 common technologies are used: drawing, bending and twisting.

• The hood allows you to increase the length of the metal workpiece, reducing the value of its cross section.
• Bending makes it possible to bend any part of the workpiece at an angle.
• Twisting is a technology in which the workpiece is twisted along the axis. For twisting, the Twister machine is used.

All elements are assembled together and fixed by welding. These operations are performed on a special table. Homemade cold forging does not require special skills.

DIY forging photo

Note!

Cold forging is impossible without special forging equipment. Let's look at the types of devices and the shapes that can be obtained with their help. We have prepared drawings and thematic videos for you. We will also consider the sequence of manufacturing a machine for cold forging with our own hands.

If you are just starting a cold forging workshop and want to avoid high costs, then making your own machines and fixtures will help you create your own small business without excessive costs.

Basic fixtures and machines

Cold forging machines are mainly designed for bending in an arc or angle, as well as for twisting. They can be manual or electrically powered.

The main types of machines and devices for cold forging:

• Gnutik
• twister
• Snail
• the globe
• Wave
• Torch

Device "Gnutik"

Purchased or self-made "Gnutik" is a universal device that allows you to get an arc or angle from a rod. It is a base with a slider, on which a stop with an angle (90° or another as needed) and two cylindrical fixed stops is fixed. By moving the slider and the corner stop, the rod is bent at an angle. To obtain an arc, a third cylinder is provided, rotating on the side opposite from the corner stop.

The fixture can be made on a horizontal or vertical platform.

Axonometry of the device "Gnutik" - vertical arrangement

To scale the dimensions, here is a drawing of the lower bar of this "Gnutik".

Bottom bar

This device is universal. With the help of nozzles on it, you can not only bend, but also cut and punch holes. But that will be the next step.

Obtaining an arc on the "Gnutik"

Getting a corner on the "Gnutik"

It looks like a homemade "Gnutik":

Device "Twister"

"Twister" - a tool for twisting bars, mostly square section, along the longitudinal axis. This simple device can be manual and electric. Principle of operation: both ends of the rod are fixed, then one fastening begins to rotate, twisting the metal to the required shape.

The appearance of the purchased manual "Twister"

See a photo of a homemade "Twister" with an electric drive, assembled using used electrical equipment:

For the manufacture of "Lanterns" and "Cones" there is a special machine, but for starters, you can also use the "Twister", as shown in the video (English, but everything is very clear).

Video: how to make a blank for "Flashlight" on "Twister"

Device "Snail"

The Snail tool is designed to create swirls (or spirals) and "currencies" (S-shaped parts). There are various designs.

One of the design options: 1 - snail plowshare; 2 - the basis of the machine; 3 - pressure roller; 4 - lever to control the pressure roller; 5 - fastening the base; 6 - a finger for fixing the plowshares; 7 - groove for the pressure roller; 8 - axis of the control lever; 9 - spring for pressing the roller; 10 - clamp for the workpiece; 11 - leading ploughshare of the snail; 12 - main axis; 13 - levers

The result should be something like this:

Another lightweight design for bending rolled products with a cross section of up to 12 mm:

1 - segment of the cochlea; 2 - eccentric; 3 - handle; 4 - base; 5 - guide skids; 6 - axis; 7 - slider; 8 - axle nut; 9 - roller mounting axis; 10 - roller; 11 - drive axle; 12 - guide eccentric; 13 - the central segment of the cochlea; 14 - lamb eccentric; 15 - main leg; 16 - connecting pin segments of the cochlea; 17 - corrective screw; 18 - connecting ear of the cochlea segments

Often the “Snail” fixture is made on a support, especially if you need to bend thick rolled products.

Several useful videos on home-made machines "Snails".

Making a snail

Machine operation

We will discuss these structures in more detail below.

Device "Globe"

Such a device looks like a school protractor and is designed to make arcs with a large bending radius from a strip, square, circle or hexagon. First, one end of the workpiece is fixed with a bend, then it is bent along the entire length according to the template. The principle of operation is somewhat similar to the operation of a canning machine for conservation.

Device appearance

On the video work on the "Globe"

Using purely muscular strength, a large diameter arc can be made on a template screwed or welded to a workbench. It is good to bend a strip on it, a thin-walled pipe, etc.

Sample

Device "Wave"

You can get wave-shaped products from a workpiece of a round, square, hexagonal section or a tube using the “Wave” fixture. The deformation of the workpiece occurs between the vertical rolls by scrolling.

Wave fixture and resulting products

Device in action

Device "Flashlight"

On this machine, blanks of the “Lanterns” or “Cones” elements are made, which can consist of 4, 6, 8 or more bars. According to the principle of operation, the machine is similar to the Twister, but here the workpieces are bent around the guide shaft, which forms a more correct and accurate configuration of the product.

Device "Flashlight"

The work of the device for the manufacture of "Flashlight"

Device for cold forging of the "Clamp" element

The cold forging element "Clamp" is intended for fixing other structural elements among themselves.

The device for bending the "Clamp" can be made according to the attached drawings.

Devices for performing "crow's feet"

"Houndstooth" - flattening with the application of beautiful notches of the ends of the blanks to give more elegance to the design or to reduce the thickness for various connections.

The ends of the elements are decorated with a "goose foot"

This operation can be performed using a machine tool with a die or fixture and a heavy blacksmith's hammer on an anvil. We provide both options in the form of videos.

Machine for the manufacture of "goose foot"

Devices for forging "crow's feet"

Detailed stamp making process

Below is a rolling machine to perform the same operation.

Machine for rolling "goose foot" (the distance between the rollers is adjustable).Materials for a rolling machine: gears and shafts - spare parts from a used combine

Operating principle

Production of "Snails" with a drive

The electric "snail" facilitates the production of curls and "currencies". This is especially valuable when the work is not “for the soul”, but for the manufacture of a large number of the same type of products on a stream when working to order.

Below are the steps for assembling a machine for bending a rod with a maximum section of 10x10 mm. The 0.5 kW/1000 rpm engine is working at the limit of its capabilities. Performs 6 shaft revolutions per minute. The segments of the snail are machined from a round blank St.45 without heat treatment, 25 mm high and 20 mm thick. The snail is mounted on a shaft on bearings from the rear wheel of the motorcycle - 7204. The supporting roller is fixed rigidly in the groove. Pulleys are installed between the motor and the gearbox.

Below are the drawings of the segments of the cochlea.

Snail element 1

snail element 2

Snail element 3

The central element of the snail

For a more massive rod (from 12 mm), the engine power should be more than a kilowatt. The photographs below show a machine with a 2.2 kW, 1000 rpm motor, giving a shaft output of about 10 rpm. This is a machine for professional use. A used gearbox was used, the matrix was cut from a workpiece 30 mm thick - the most time-consuming process.

For cold forging, you will also need an anvil and a hammer. The forge is not needed, it is required only for hot forging.

Advice! Before starting work, draw a full-size sketch of the future design. This will help to adjust the elements and not get confused during assembly.