During manufacture and repair jewelry There is a need to create strong permanent connections of very small parts. The specificity of this delicate craft places the highest demands on the technology for performing such work.

In addition to the fact that when working with products of some artistic value, the aesthetic component is in the first place, a special specificity is created by the fact that they are made, as a rule, from gold and other precious metals.

Traditional methods of creating joints in jewelry are riveting and soldering, which are successfully used to this day. Previously, welding was rarely used for jewelers. But since, it is increasingly used to create jewelry and other valuable products.

The general development of welding and electronic technologies has led to the emergence of new methods for welding valuable jewelry. Based on the process technology used, currently existing welding machines for jewelry can be divided into three types:

• spot electric arc welding using a non-consumable electrode;
• electric resistance welding;
• welding using laser.

In addition to the listed technologies, there is also a diffusion connection. This method should be considered separately from the above, since it is carried out by rather primitive means and does not require the use of complex technical devices.

Arc point

The general principle of this jewelry spot welding technology is the same as that of the conventional electric arc process. The source of energy for melting the metal being welded is an electric arc ignited between the refractory electrode and the workpiece.

However, there are significant differences between arc machines for jewelry welding and their more powerful industrial counterparts. The main difference lies in the welding process mode.

The operation of a large industrial welding machine is characterized by a fairly long burning mode of the electric arc (this applies to working with both consumable and refractory, tungsten or carbon electrodes).

Jewelry spot electric welding is distinguished by the pulsed nature of its work. The welding arc in this case is a short electric discharge, which, despite this, manages to melt the metal in the welding zone and form a welded joint in a small area (point). For this reason, this type of welding is called spot welding.

The design of the apparatus for jewelry welding has even more significant differences. The source of voltage for creating an arc in it is a storage capacitor, which is discharged during the welding pulse.

Sample devices

An example of equipment for jewelry spot welding is a unit from Lampert (Germany) and Orion pulse150i (USA).

Both devices are equipped with binoculars, through which you can see the smallest details of the jewelry. To protect the eyes, the eyepieces are equipped with a shutter that closes during an arc discharge.

The work proceeds as follows. The jewelry is fixed in the place intended for this purpose, while a special clamp ensures its reliable contact with one pole of the device.

The jeweler touches the item with an electrode in the right place. At this moment, the storage capacitor is discharged, and the moving part of the electrode is automatically retracted, creating a spark gap in which an electric arc burns. At the same time, a portion of argon is supplied through a hole in the center of the electrode.

During the welding process, if necessary, filler wire can be used to fuse with the material of the product.

Contact

This type of joining parts is not fundamentally different from resistance welding, which is widespread in mechanical engineering. The parts to be joined are compressed and a welding current is passed through their point contact.

A permanent connection is formed due to plastic deformation of parts under the influence of external pressure and their fusion at the point of contact.

Welding machine for jewelry, based on the resistance welding method, works as follows. The parts to be welded are fixed in a special device that serves as a punch and provides contact with the electrical poles of the device, after which (most often by pressing a pedal) welding current is supplied.

This connection method is often used as a means of temporarily fixing parts for further soldering of the connection.

Laser

The principle of laser technology is to melt the edges of the parts being joined not with an electric arc, but with a laser beam, that is, a coherent beam of light. The radiation source is a solid-state laser using a yttrium aluminum garnet crystal.

This choice is not accidental. The radiation created by this particular mineral is most completely absorbed precious metals, that is, their heating by this laser is carried out most efficiently.

Laser welding of jewelry is characterized by unique properties:

• the ability to extremely accurately focus the beam;
• the possibility of local heating of a very small area of ​​the product surface;
• there is no need to protect the eyes with tinted glass, which allows you to observe the welding process in the smallest detail.

Laser welding machines differ in size and price. By adjusting the power, you can weld jewelry from various alloys.

Diffusion welding

The essence of the diffusion process comes down to the following. The contact surfaces of the jewelry are ground and thoroughly cleaned, after which they are clamped with great force between steel plates and heated “red hot” (to be precise, to 70 - 80% of the melting point) in a muffle furnace or forge.

When keeping the workpieces in this state certain time, at the point of contact of the parts, mutual diffusion of their atoms occurs, which leads to the creation of a strong permanent connection.

Welding is a very important process in manufacturing. Such a device, where a laser is used as an energy source, is called laser welding, which is used to join similar and dissimilar metals. This is the most modern way for welding metal parts, which last years attracts more and more attention.

This type of welding was created in the 60s of the twentieth century. The advantage of laser radiation is its high energy accumulation. This makes it possible to connect various metals and alloys with thicknesses ranging from a micrometer to one centimeter.

Laser radiation creates a weld in this way: it is directed into a focusing system, where it is converted into a smaller beam, absorbs, heats and melts the materials being welded. Laser welding uses guide mirrors to focus energy.

Microwelding connects material up to 100 microns thick, mini-welding melts at a depth of 0.1 to 1 mm, macro-welding is capable of soldering parts with a thickness of more than 1 mm. Depending on the position of the parts and the laser beam, the soldering pattern can be:

• end-to-end;
• overlap;
• corner;
• other options.

Types of lasers used

Laser welding machines come in solid-state and gas types.

The solid state uses a pink ruby ​​rod in which chromium ions are heated when irradiated and release stored energy. The ends of the ruby ​​base are coated with silver, which tends to reflect light. Translucent and transparent mirrors are formed, from which chromium ions are repelled and move around the ruby ​​rod in a spiral, engaging the following ions and forming a continuous action. An energy explosion occurs, which moves through the half-transparent glass and is collected by the lens at the point of the welding machine. The disadvantage of a solid-state laser is that it operates only in continuous mode, while in pulsed mode the efficiency is very low (from 0.01 to 1%).

If we compare a gas laser and a solid-state laser, then the gas laser has higher power and efficiency levels. The device of such a laser is a round tube filled with gas on both sides, pressed by translucent and opaque parallel mirrors. The tube contains electrodes; between them, under the influence of a discharge, energetic electrons appear, which engage gas particles. When they return to their original state, light quanta are formed, which are collected and directed to the site of adhesion. A huge advantage of gas lasers is that they operate in both modes: pulsed and continuous.

Welding of thick alloys is carried out with deep penetration, that is, a vapor-gas channel is formed, which is very different from joining metals of smaller thickness. To ensure that no flaws appear during welding and the seam is good quality, the required power is selected. A speed of 0.2-0.3 cm/s ensures high productivity and high-quality fastening of parts without defects.

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Application of laser welding

Laser welding machines are being used increasingly due to their quality, environmental friendliness and speed of the process.

The laser welding machine is used:

1. For joining steel. This welding of steel ensures high strength of joints, neatness of seams, minimization of corrosion, and high cooling rate. Before starting welding of structures, it is necessary to prepare the edges of the parts: remove scale from rust and remove moisture. They adjust parts and structures for welding with the greatest precision. Pure helium or its mixture with argon is used as a shielding gas.
2. For soldering metal structures. Laser is carried out with deep penetration. An important technique for this is the use of filler material, which makes it possible to regulate the composition of the seam, as well as reduce the requirements for the accuracy of assembling structural parts for soldering. The peculiarity is that filler wire with a diameter of up to 1 mm is used and it is fed correctly using special mechanisms under laser radiation. If you work at a speed of 25-30 mm/s, the number of deformations is reduced compared to arc welding of metals. The main advantages of joining metal with deep penetration are powerful radiation and the required welding speed. Such strong radiation increases the ability to melt and form a high-quality seam. Please note that the laser beam diameter should be between 0.5 and 1 mm. If the beam is smaller than the specified diameter, this can lead to overheating of the weld metal, partial evaporation and the formation of defects. If the beam is more than 1 mm, then the efficiency decreases several times, which can lead to refraction of the seam.
3. For glasses repair. Laser welding of glasses is the best way to repair frames made of various metals and alloys. The joint is strong and uniform due to the fact that solder is not used in welding. The repair procedure lasts no more than 20 minutes, the seam is not contaminated with particles of solder or electrodes, and a small seam remains at the joint, which is invisible after grinding. To repair glasses, you need to choose the right equipment with the right power, since low-power lasers cannot solder materials with high thermal conductivity.
4. For jewelry repair. Laser soldering provides the opportunity to repair silver and gold items as accurately as possible, without deformation. The decoration does not heat up completely during work, but only partially, in the places that need to be connected. Another advantage is that there is no need to remove gems from the product, because when using laser radiation the integrity of the decoration will not be compromised.
5. For joining aluminum, magnesium and titanium alloys. are selected to ensure the desired weld geometry, prevent the formation of cold cracks and create a good weld.

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Manual laser welding

Laser welding equipment already exists that operates manually. With it you can do it yourself:

• point adhesion;
• jewelry repair;
• compaction of materials is only superficial;
• processing of medical equipment;
• glasses frame repair.

A manual welding machine can increase productivity because its speed is much faster and the welded products are of higher quality. For example, with a continuous beam a steel sheet 20 mm thick is welded in 1 pass at a speed of 100 m/h, and with an electric arc such a sheet is welded at a speed of 20 m/h in 6-8 passes.

Do not forget that lasers emit a powerful beam, which can be visible or invisible. In most cases, a laser welding machine emits an invisible beam of infrared light. If precautions are not taken, the beam may enter the eyes or skin.

You need to choose high-quality laser welding equipment that is properly designed and equipped with covers for safety. If you carefully follow safety precautions, the welding machine will not be dangerous to your health.

Repairing jewelry and costume jewelry using latest technologies. The use of laser welding in the SAPPHIRE jewelry workshop for spot repairs of small but significant parts of women's and men's jewelry.

How many fashionistas suffer when a clasp on their jewelry breaks or a stone falls out. After all, the jewelry can still be worn, but how can it be repaired? It turns out that using a non-contact laser jewelry welding process, you can repair any damage!

How laser soldering works - laser welding

High-tech lasers have firmly taken their place among the equipment of jewelry workshops. Metal welding, performed using a precise laser beam, has become an excellent solution for repairing parts of glasses, jewelry and costume jewelry.

Thanks to the laser’s ability to instantly melt and solder the most seemingly incompatible materials to each other, the result is a very strong seam that is almost invisible even to the trained eye.

Laser soldering is needed where no other type of welding can cope:

• In the manufacture and repair of white and red jewelry made of platinum and gold. Using a laser allows parts to be joined without solder, which was previously noticeable during conventional welding.
• To install the stones in their original place, using laser jewelry soldering it became possible to manufacture new claws for the stone.
• When connecting dissimilar metals.

Advantages of using laser welding

Despite the rather high cost of such equipment, its use has long been justified. Laser welding in Moscow has made it possible to repair products from any material with incredible accuracy and strength of the finished part. In addition, specialists skillfully hide even the slightest seams remaining after repairs. For example, the jewelers of the SAPPHIRE workshop can apply a galvanic coating that completely masks minimal traces of the repairs performed.

For laser welding that requires minor intervention (repair of eyeglass frames, broken jewelry clasps and other minor damage), our workshop will complete the work within a short time. More complex welding work, requiring the painstaking work of a jeweler, is usually completed within 24 hours.

If your expensive jewelry needs laser welding, you can find out the cost of repair:

• by contacting our workshop directly;
• looking at the price list

We will solve any problem!

In the event that other jewelers in Moscow refused to repair the jewelry, do not despair. Our jewelers using laser soldering:

• they will fix any breakdown, even the most terrible one;
• They will give a 6 month guarantee.

Moscow is a huge city with many jewelry repair and sales shops, but not everyone is qualified to repair very expensive jewelry. That's why it's so important to turn to professionals who know that laser beam welding or any other jewelry welding must be done so that the product, upon completion of the work, looks like it just came out of a display case!

Sometimes very unpleasant accidents happen with jewelry, both precious and costume jewelry. A broken earring, the clasp of a brooch, or a crack on a medallion will not allow you to wear the jewelry as before. Buying a new one will be expensive, and not all Moscow jewelers will agree to undertake repairs. This is a truly complex and intricate job that not everyone can do, and certainly not everyone can do it so well that the client is satisfied.

Laser soldering in Moscow in the GoldLazer workshop solves even the most complex problems. All our specialists have extensive experience, so they will repair your jewelry even if it is a very difficult task. The smallest breakdowns and defects will be eliminated using laser soldering, and not a trace will remain of them. Moreover, if your jewelry already has some kind of seam from a previous repair, our specialists can quickly remove it, and your jewelry will look like new again.

Prompt jewelry repair using laser soldering

Jewelry repairs are usually required urgently. Unfortunately, not all jewelry workshops in Moscow can offer sufficiently prompt services. In the GoldLazer workshop you can order jewelry repair urgently.

Our specialists work not only efficiently, but also quickly. Professional laser soldering equipment and extensive experience help them repair any jewelry in the shortest possible time. As a rule, repairing jewelry in our workshop takes no more than a day.

Laser soldering of jewelry is a task for professionals

If you value your jewelry and want to preserve it, then jewelry repair should be trusted only to professionals, otherwise the result may be the most disastrous.

They work in the GoldLazer workshop jewelers with extensive experience who will repair your jewelry quickly and efficiently. All products repaired in our workshop have a 6-month warranty.

Call us at the workshops and we will tell you how to get there!

+7 925 555 29 12

1. m. Mendeleevskaya or Novoslobodskaya
(repair 15 min.)

Schedule: Mon-Fri 10:00-19:00,
Sat. from 11-00 to 18-00, Sun. day off How to get from the metro

5. m. Prospekt Mira(repair 15 min.)

Working hours: Mon-Fri. 10:00-20:00
Sat., 11:00-18:00 Sun. day off
How to get from the metro

Laser welding with a guarantee in Moscow!

Entire books can be written about the possibilities of laser welding (soldering), since this unique method allows you to quickly and very efficiently repair steel, titanium and other metal products.

As for the workshops of our company, together with laser welding, we also perform such an important operation for the repair of glasses and jewelry as the restoration of lost rhinestones and crystals, which are often used to decorate these products and which are most often lost. A huge selection of all kinds of rhinestones allows us to pleasantly surprise our customers, satisfying their need for repairs one hundred percent.

Laser soldering

When repairing frames and jewelry, our craftsmen use laser welding (soldering), which achieves high geometric accuracy, precision energy dosage and minimal thermal impact on the soldered joint. For this reason, the welding itself can be performed without fear of damaging nearby heat-sensitive elements of the product, and also avoiding annealing of any soldered elements. Laser welding can even be used to repair non-soldered joints in some serial technologies.

Laser welding (soldering) is different:

Precise targeting of the soldering area;

High concentration of the impact zone (up to 0.2 millimeters);

Ease of transition from one processed product to another;

High precision energy dosage, which completely eliminates the formation of burns;

High technological reproducibility.

Laser surfacing

Laser surfacing is a high-tech operation that is significantly superior to a similar gas-powder operation. Laser surfacing allows:

Reduce the thermal impact zone to negligible values ​​- hundredths of a millimeter;

Reduce thermal deformations to a minimum;

Regulate the volume of the melt within a relatively large range, which minimizes subsequent mechanical processing of the product.

This technology is widely used in tool production, mechanical engineering and so on (in various related areas), for example, in the repair of calibers, tooling, elimination of various defects such as cavities and pores, in order to restore all kinds of worn out molds and so on. If we consider more specifically, laser cladding is used:

To restore edges work surface stamping equipment and molds;

In order to restore the site of a lowered working surface;

For melting surface burrs and cracks;

For the purpose of welding chips, burrs, nicks, opened pores and cavities, as well as other defects;

To “heal” areas of adhesive setting;

In order to eliminate networks of high-grade cracks.

Laser heat treatment

This heat treatment is widely and successfully used for more effective strengthening of all kinds of cutting tools, such as cutters, milling cutters, drills, broaches, etc., measuring instruments made of steels Kh12F, KhVG, 9HS, as well as high-speed steels. In everyday life, laser heat treatment is used to sharpen saws, knives and other cutting tools.

As a result of this treatment (pulsed laser radiation on the cutting edge), the tool becomes more resistant to loads and retains its cutting properties longer. For example, slotting cutters made from steels R6M5K5, R6M5, R18, R9K5 demonstrate:

Increased durability - several times;

Reduced sticking (adhesive setting) to its edges, this is especially noticeable when processing various non-ferrous alloys;

Increased processing purity;

Significantly increased cutting speed.

Laser hole drilling

Some industries require drilling very small holes (less than 0.5 millimeters in diameter). Carrying out such work using conventional drills is ineffective when:

The hole must be drilled at an angle;

The ratio of the diameter and cutting depth is greater than one (the higher this indicator, the less effective traditional drilling is);

You need to drill holes in very hard materials;

It is required to make non-circular holes.

Let's add to this that traditional drilling of small holes is ineffective in terms of labor productivity, as well as too high scrap due to frequent breakage of thin drills. In addition, sharpening them is a complex and labor-intensive operation.

In this case, electroerosive piercing is also used, however, it also has serious disadvantages, since in deep holes it moves the tool axes to the side, is characterized by low productivity and low environmental friendliness, for which strict control is established in Russia today.

And only laser drilling (laser piercing) can easily cope with this task. Moreover, it is performed in two modes:

Small holes are obtained due to the formation of a liquid phase and its removal by steam of evaporated metal; this method is highly productive, but not very accurate;

Small diameter holes are obtained by sublimation; This method is distinguished by great accuracy and comparatively (with conventional drilling) high labor productivity.