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Laser Welding Technology in Medical Devices

With the advent of lasers, people gradually realized that they have strong advantages such as high brightness, monochromaticity and directionality, and they have played an important role in scientific research, military, communications and other fields. Welding technology combines with laser to form a new waterproof laser pointer welding technology, which can effectively break through the limitations of traditional welding technology, and is therefore actively used in automotive manufacturing, aerospace and other fields.

Secondly, laser welding technology has also been widely used in medical and health applications. Due to the demanding requirements of the high cleanliness of its manufacturing process, laser welding technology meets its needs. Compared with other commonly used welding techniques, the laser welding technology produces almost no welding slag and debris, and it is not necessary to add any adhesive during the welding process, so that the entire welding work can be completed in the clean room. The addition of laser welding technology has greatly promoted the development of medical devices, such as the housing of active implantable medical devices, radiopaque markers for cardiac stents, earwax protectors, balloon catheters, etc. .

Implantable medical electronic devices, such as cardiac pacemakers, implantable electrocardiographs, and neurostimulators (spinal cord stimulators, deep brain stimulators, and implantable cochlear implants), are used to manage and treat the body's physiology Conditions such as heart rate, chronic pain, Parkinson's disease or severe deafness. In the past decade, patients have rapidly increased the use of implantable medical electronic devices at double-digit rates in order to improve the quality of life. These implantable electronic devices typically consist of microelectronic circuits and batteries that provide energy. In order to protect microelectronic circuits and batteries, they need to be sealed in a metal case. If the seal is lost, the body fluid can directly penetrate into the metal package, causing short circuit failure of the microelectronic circuit and endangering the patient's life.

Laser welding technology is the most common connection and sealing technology for implantable medical devices. The metal casing of implantable medical devices generally uses titanium and titanium alloys, but titanium has a strong ability to absorb hydrogen, oxygen and nitrogen at high temperatures, so the military laser pointer welding process needs to be carried out in an inert gas-tight environment. In laser welding, the control of laser energy plays an important role in the quality of welding. The laser illuminates the metal surface, which initially reflects 60% to 80% of the laser energy. As the temperature increases, the metal absorbs the laser energy gradually. When it reaches the boiling point, it can absorb nearly 90% of the energy.

The cardiac stent, also known as the coronary stent, is a commonly used medical device in cardiac interventional surgery and has the function of dredging arterial blood vessels. The main material is stainless steel, nickel titanium alloy or cobalt chromium alloy. During the process of transmitting the heart stent to the destination, the radiopaque lines at both ends of the stent can clearly see its trace and open state. The radiopaque markers can be made of precious metals such as gold, enamel and platinum iridium. Riveting, this molding process uses a green laser pointer with a minimum spot diameter of 40 μm (0.04 mm) to weld a disc-shaped marker into a special eyelet.

The gastroscope biopsy forceps used in medical treatment need to penetrate deep into the patient's body. Therefore, the quality of the biopsy forceps is very demanding. Each component of the composition needs to meet certain tensile strength and good appearance, especially the surface is not allowed. Glitch and other situations. In the previous production process, the front end of the gastroscope biopsy forceps is combined with riveting, resistance welding, etc., and the riveting method will leave burrs and other defects on the surface of the puncture gun, and resistance welding will also produce parts. The large deformation affects the practical application of the puncture gun, and the laser welding technology has the characteristics of non-contact processing, narrow heat influence range, high efficiency, high processing precision, etc., which can realize the flawless, no groove and no crease of the medical field. No burr and no cracking requirements.

Balloon catheter laser welding is the use of laser as the source of energy for infrared welding, which can be directly applied to the surface of the plastic that absorbs the 488nm laser pointer using a laser beam to melt the plastic for welding. The advanced laser welding technology can realize the seamless connection between the balloon tip and the tube body, so that the balloon catheter can be unimpeded when propelled in the curved and narrow diseased blood vessels, the damage to the blood vessel is minimized, and the operation process is safer.

The introduction of laser welding technology is beneficial to further reduce the outer diameter of the balloon dilatation catheter tip. A schematic diagram of the laser welded balloon catheter is shown in Fig. 8. Unlike metal welding, plastic laser welding requires less laser power. The greater the welding laser power, the larger and deeper the heat-acting zone on the plastic part will cause the material to overheat, deform, or even damage, so the laser power should be reasonably selected according to the depth of melting required. The use of plastic laser welding technology in medical devices is far more than the above applications. Plastic laser welding technology is being adopted by more and more medical device manufacturers, and its application prospects will be very bright.

In addition to the application of laser welding technology to the production of medical equipment, there are many other innovative usb laser pointer processing technologies that have great potential in the manufacture of medical equipment, such as laser surface modification, laser cutting, laser drilling and laser micromachining. Research and use of advanced laser processing technology will design more high-quality, high-demand medical equipment.



[ 11:41 ] [ 15/11/2018 ] [ Shanghai ] [ 0 commentaires ] [ Ajouter un commentaire ] [ Lien ]
Mots clefs :

The Popularity of Laser Cutting Machine

Compared with the traditional processing technology, fiber laser cutting machine in the production of food machinery in the outstanding advantages. The traditional processing methods need to open mold, stamping, cutting plate, bending and other links, low efficiency, mold consumption, the use of high cost, seriously hindered the pace of food machinery industry innovation and development.

Laser processing in the application of food machinery has the following advantages: safety and health, red laser pointer cutting is a non-contact processing, which is very clean, suitable for food machinery production; cutting slit, laser cutting of the slot is generally 0. 10 ~ 0.20mm; cutting surface smooth, laser cutting cutting surface without burrs, cutting all kinds of thickness of the plate, and the truncated surface is very smooth, no secondary processing to create high-grade food machinery; speed, and effectively improve food machinery production efficiency ; Suitable for large-scale processing of products, large pieces of mold manufacturing costs are high, laser cutting without any mold manufacturing, and can completely avoid the formation of the material when the collapse of the pile, a significant reduction in production costs, improve food machinery Grade. Very suitable for the development of new products, once the product drawings, immediately after the laser processing, in the shortest possible time to get new products in kind, effectively promote the upgrading of food machinery. Saving materials, laser processing using computer programming, can be different shapes of products for the material cut, to maximize the utilization of materials, reduce the cost of food machinery production.

blue laser pointer

With the gradual popularization of laser cutting machine, the market demands to further improve the cutting efficiency (high speed cutting), reduce the standby time (automatic feeding and unloading system), expand the application area, reduce operating costs, etc.. The green laser and computer numerical control technology, advanced optical system and automation and high precision T positioning combined automatic discharging, cutting process database, remote diagnosis and remote control are integrated, the features of laser cutting and other processing methods, such as laser punch made of multi function processing machine the factory complex needs efficient processing, it has the versatility of laser cutting and other processing in the form of high speed and high efficiency characteristics, can be completed at the same time cutting, drilling, marking, scribing, forming etc..

Laser cutting is a kind of high energy density controllable non-contact processing. It focuses the laser beam into a spot with a minimum diameter of less than 0.1mm, so that the power density at the focal point can exceed 107W to 108W / cm ~ 2. The irradiated material is quickly heated to the vaporization temperature and evaporated to form pores. As the beam moves relatively linearly with the material, the apertures are continuously formed with slits of about 0.1 mm in width. The cutting also adds auxiliary gas to the material to be cut to accelerate the melting of the material, blown away the slag or protecting the slits from being oxidized. Many metal materials, no matter what kind of hardness, can be used for laser deformation without cutting. Most organic and inorganic materials can be laser cut.

Compared with the traditional plate cutting method, laser pointer cutting has obvious advantages. It is easy to cut fast, high production efficiency; cutting quality is good, slit narrow; material adaptability, no tool wear; whether it is simple or complex parts, you can use a laser precision forming rapid cutting; high degree of automation, Low labor intensity, no pollution; low production cost, good economic efficiency; the effective life cycle of the technology is long.

Laser since the middle of the last century was born, is no longer confined to the laboratory, but further to get in by every opening of human production and life, both in the industrial manufacturing field, or health care, entertainment and other industries, "meet the eye everywhere examples of laser life changing". Sometimes, the laser is far beyond the horizon of ordinary people, such as laser weapons on the battlefield, remote laser welding in automobile manufacturing, laser processing of solar cells, etc.. Sometimes, it is everywhere, such as supermarket bar code laser scanning, home fast broadband optical fiber network, the show on the bizarre blue laser pointer dance etc.. For ubiquitous lasers, humans seem to be familiar with the application.



[ 08:38 ] [ 24/10/2017 ] [ Daocheng Xian ] [ 0 commentaires ] [ Ajouter un commentaire ] [ Lien ]
Mots clefs : travel

Laser Surface Amorphization

In this study, a cadmium sulfide (CdS) line with a diameter of 204 nm and a length of 15 μm was used as the core design of the optical cavity (Fig. 1). The high refractive index of the nanowires causes the incident light to have a high reflectivity factor at the end face and be guided by the nanowires. This arrangement forms the Fabry-Burrow cavity, which, when activated by an external light source, forms a laser. The laser wavelength thus formed depends on the refractive index around it. By measuring the wavelength of the most powerful laser output, the refractive index of the liquid immersed in the nanowires can be determined.

There are a variety of methods for surface nanocrystallization of materials. There are a large number of surface nanocrystallization technologies. It is a surface layer which can realize the nano-characteristics by means of laser surface treatment technology and nanometer technology. It can be collectively referred to as laser surface nanocrystallization technology; More generally referred to as laser nano-surface engineering technology, is directly or mainly the use of laser this specific technical means to directly change or add material to change the surface of the solid material is treated, the composition or structure, so that the formation of nano-crystal Grain or a certain nanoparticle composition of the surface layer. Or the use of laser etching, laser embossing, laser hair, laser micro-nano modeling and other means to achieve nano-structure on the surface of the material.

red laser pointer

In the 1970s, after the successful development of high-power lasers, blue laser pointer surface treatment technology into the practical application, and then the rapid development, there have been laser quenching (laser phase hardening surface modification technology), laser remelting, laser surface alloying, Laser cladding, laser surface amorphization and laser shock enhancement. These laser surface treatment technology through the surface of the material to form a certain thickness of the treatment layer to improve the mechanical properties of the material surface, metallurgical properties, physical properties, thereby enhancing the parts, the workpiece wear, corrosion resistance, fatigue and other properties. Laser due to high power density, good direction, energy transfer convenience, can be transmitted in a variety of transparent media and other characteristics.

Generally refers to the use of laser remelting, high-energy 300mw laser pointer surface melting and not add any other ingredients to the substrate surface rapid melting and solidification grain refinement, eliminate defects, reach the aim of improving the surface structure. Laser remelting as a kind of surface engineering technology, a large number of researchers have done related research work, pointed out that the research can significantly improve the surface hardness and corrosion resistance of the material and wear properties by laser remelting, but as the surface of nanometer technology is not clearly separate.

http://htpowlasers.mihanblog.com/post/2

https://htpow.deviantart.com/journal/The-Golden-Age-of-Laser-Technology-699324343

http://michale.hamazo.tv/



[ 11:42 ] [ 18/08/2017 ] [ New York ] [ 0 commentaires ] [ Ajouter un commentaire ] [ Lien ]
Mots clefs : laser

Laser Surface Nanotechnology

Laser surface nanocrystallization technology includes surface material grain nanocrystallization and implementation of surface nanostructures.

Nano-materials and nanostructures have a variety of excellent performance has been gradually recognized, for metal materials, if the grain size to nano-scale, the overall performance will be greatly improved, while the metal surface of the nano-pattern Structure can greatly improve the material surface properties, can make the material with anti-oxidation, wear resistance, corrosion resistance, super-hydrophobic and a series of excellent performance.

There are a variety of methods for surface nanocrystallization of materials. There are a large number of surface nanocrystallization technologies. It is a surface layer which can realize the nano-characteristics by means of blue laser pointer surface treatment technology and nanometer technology. It can be collectively referred to as laser surface nanocrystallization technology; More generally referred to as laser nano-surface engineering technology, is directly or mainly the use of laser this specific technical means to directly change or add material to change the surface of the solid material is treated, the composition or structure, so that the formation of nano-crystal Grain or a certain nanoparticle composition of the surface layer. Or the use of laser etching, laser embossing, laser hair, laser micro-nano modeling and other means to achieve nano-structure on the surface of the material.

red laser pointer

In the 1970s, after the successful development of high-power lasers, laser surface treatment technology into the practical application, and then the rapid development, there have been laser quenching (laser phase hardening surface modification technology), most powerful laser remelting, laser surface alloying, Laser cladding, laser surface amorphization and laser shock enhancement. These laser surface treatment technology through the surface of the material to form a certain thickness of the treatment layer to improve the mechanical properties of the material surface, metallurgical properties, physical properties, thereby enhancing the parts, the workpiece wear, corrosion resistance, fatigue and other properties. Laser due to high power density, good direction, energy transfer convenience, can be transmitted in a variety of transparent media and other characteristics.

With the development of nano-materials and nano-surface engineering technology, the application of various laser surface treatment technology, to achieve the surface of nano-exploration of the surface has gradually started, and achieved certain results. Laser surface nanocrystallization technology, due to the fact that laser surface treatment technology and nano-surface technology combined with the production, so it also has all the advantages of 100mw laser pointer surface treatment, compared to other surface nano-technology, these advantages are essential.

Such as mechanical grinding surface nano-technology, it is not suitable for large area, complex shape of the parts; such as surface roll or vibration shot peening surface nano-technology in dealing with complex shape parts are difficult, the actual production is difficult to achieve, and Laser surface nano-technology is basically no similar problems. Laser irradiation surface treatment research focused more on the surface hardening of laser hardening work, but also laser solid solution or laser annealing on a lot of research, there is no researchers explicitly proposed to use laser irradiation for metal Research on Nano - Surface of Parts.

Generally refers to the use of laser remelting, high-energy 300mw laser pointer surface melting and not add any other ingredients to the substrate surface rapid melting and solidification grain refinement, eliminate defects, reach the aim of improving the surface structure. Laser remelting as a kind of surface engineering technology, a large number of researchers have done related research work, pointed out that the research can significantly improve the surface hardness and corrosion resistance of the material and wear properties by laser remelting, but as the surface of nanometer technology is not clearly separate.

http://www.watchen.tv/weblog/5079/The+Generation+of+High-power+Laser+Device

http://www.yaarikut.com/blogs/steel-rust-and-mold-decontamination

http://kizifriv.org/p/laser-energy-measurement/



[ 11:25 ] [ 14/08/2017 ] [ New York ] [ 0 commentaires ] [ Ajouter un commentaire ] [ Lien ]
Mots clefs : lasergreen laser pointer

A Class 3B high powered laser pointer

A Class 3B high powered laser pointer is not normally considered a skin or materials burn hazard.Adopting high-performance design, this laser pointer pen does well in giving out soft and high-efficient single-point pattern light.Laser beam range tests are conducted by most laser product manufacturers under controlled conditions.

You should never look directly into the aperture of any high powered laser pointer product while the laser is in operation.Precisely centered inside this 1.25" Howie Glatter Laser Collimator's 3" long machined aluminum body is a solid-state 5 milliwatt laser diode.Use of laser protective eyewear is suggested or recommended (depending on the laser's power level).

Then there is space, the domain in which green laser pointer have captured the imagination of fiction writers.Among those weapons, laser attack system enjoys significant advantages of fast response speed.Chinese military is in the middle of processing its own arsenal of lasers.So the space-based laser weapon system will be one of the major ASAT development projects.

If the returning green laser pointer beam falls exactly on the small black aperture that is emitting the beam.For decades, most efforts at high-energy laser weapons, such as the US Navy's Mid-Infrared Advanced Chemical Laser.American weapons engineers have demonstrated lasers that coherently combine the output of multiple fiber lasers.

Green 2000mw Laser Pointer

The machine's laser pen beam attack is deadly, but as long as you get in close and circle.Giant weapon could battle with laser beams while Link ran across the battlefield between them.It sets out near-term action items to make fielding a laser weapon.As you play you can unlock attachments and upgrades that add things such as a laser sight.

He said that the development of laser pen weapons for the MiG-35 would begin immediately after flight testing is completed this summer.Before the laser fires, there be energy surrounding the Guardian's eye, followed by a screen flash.Hit the laser with your stasis ability — this turns off the laser.The drone fired a laser weapon into the fuel stream and the explosion followed quickly.

If, through a null detectable blue laser pointer or similar interface, you can split the vehicle system up into separate units.Which is what this laser gun was originally designed to do.The diameter of the telescope firing the laser beam is 0.6 meters wide.Who has a laser gun and barriers she can throw onto her allies.The Karrar's features, including a laser rangefinder, remote controlled machine gun.



[ 10:46 ] [ 16/03/2017 ] [ ] [ 0 commentaires ] [ Ajouter un commentaire ] [ Lien ]
Mots clefs : lasers