Leading Metal Welding Service Company in China!
Ningbo Kang Ying Health Technology Co., Ltd. is dedicated to the design, development and manufacturing of precision sheet metal. Our products are involved in many fields such as security, IT, automotive, medical, finance, new energy, intelligent health, etc. and are exported to more than 20 countries and regions such as Europe, North America, Japan and Australia.
Professional Technical Team
Our company has a team of engineers specialized in product development, who can skillfully use industrial design software and Chinese and English language, and can exchange design solutions with foreign customers skillfully.
Advance Equipment
The company pays attention to quality control and investment in testing equipment, with perfect parts testing equipment, sound insulation room, push and pull testing equipment, life testing equipment; to ensure that incoming parts, production process parts.
Complete Qualifications
Since its establishment, the company has been awarded ISO9001: 2008 international quality management system, ISO141001: 2015 environmental management system certification, ISO20000; 25001 and 27001. And our R&D department has obtained a total of 30 inventions and new patents.
Strong R&D Capability
We have a professional R&D team, including software and hardware engineers, which can develop and design products independently. We also provide customers with services from design concept to finished products.
Turnkey Metal Fabrication Services
Turnkey metal fabrication services, also known as full-service metal fabrication, is a process that uses a variety of equipment to improve products for customers in a timely and efficient manner.
Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion.
Metal Centerless Grinding And Polishing
Centerless grinding and polishing is a metal finishing process that involves removing material from the surface of a cylindrical part with an abrasive wheel and polishing it to a smooth, shiny finish.
Metal Stamping And Punching Service
Metal stamping is a manufacturing process used to convert flat metal sheets into specific shapes. It is a complex process that can include a number of metal forming techniques-blanking, punching, bending and piercing, to name a few.
Metal bending is the use of presses and other mechanical presses to apply pressure to the surface of metal materials to deform the metal and shape it into pre-defined shapes according to different product designs.
Laser cutting is a precise process and can be used to cut simple and complex shapes, for metal cutting or laser engraving. Laser metal cutting is the new standard for cutting 2D parts from large sheets of raw materials.
Custom Metal Fabrication Service
Custom metal fabrication refers to the customizable application of different fabrication processes to manufacture a product. Unlike traditional stock metal fabrication processes, the custom fabrication process offers flexibility for manufacturing application-specific products.
The treatment of metal is a process in which parts or components made out of metal are treated before any actual coating takes place. The purpose of this treatment is increasing the surface energy level of a particular metal surface so that it can easily adhere to the printing or coating that is about take place.
Turnkey Metal Fabrication Services
Ningbo Kang Ying Health Technology Co., Ltd offers a complete full-service approach from concept to completion. We can produce a finished product to your satisfaction based on the product design drawings you provide, including manufacturing, sourcing, finishing and value-added assembly.
Sheet metal welding is a common manufacturing process whereby metals are fused together using extremely high temperatures. During cooling, the joints harden creating permanent structures. When welding with sheet metal, the exact process will vary according to the type of metal you are using and its intended purpose.
Welding is the most durable and strongest method to join two separate pieces of metal with high heat. The benefits of choosing welding services are plenty, but special consideration has to be taken for the type of metal to be welded. Factors such as metal's melting point, electrical conductivity, inherent strength and how the metal reacts to forces such as stretching and bending should be considered. We use two common welding techniques called TIG welding and MIG welding.
Importance of Metal Welding Services
For Making the Joints Permanent
Metal welding by a pro, ensures that joints are strong, and are properly done to last lifetime. It eliminates any risk of sudden tear and falling of the roof. Many times, we hear kitchen shelves bounce out of the wall, this is because welding has not secured the joints, so we have to take all necessary precautions.
Eliminates Risks Due to Natural Causes
Welding brings homogeneity and continuity in metal construction. In humid climatic conditions, nuts and bolts can corrode and eventually break. With welding this risk can be ward off easily.
Difficulty in the Existence of Electrical Equipment
This may sound silly, but it is true. Electrical equipment and automobiles are completely dependent on the welding industry as it increases the life of the product. Not to forget, it also gives jobs as most of the welding work requires human touch especially those which are customised and have complicated designs. The shipping industry would also be dysfunctional without a reliable welding service. Over the period, it has also been realised besides working with welding experts, a good customer service provided by the welder goes a long way and makes the client confident of the project.
Types of Arc Welding
- Flux-cored arc welding (FCAW) requires a constant, consumable electrode with a flux and constant voltage. A shielding gas is typically unnecessary. This is a portable welding process and is common in construction. This type of welding produces smoke, and operator skill and slag (contamination) exclusion largely determines the weld quality.
- Gas metal arc welding (GMAW) forms workpieces by the used of a metal electrode. A shielding gas is fed through the welding gun to prevent weld filler impurities. This type of welding does not transfer metal across the arc, and metal is only deposited when the wire touches the workpiece. Spray-transfer GMAW welding streams molten drops across the arc from the electrode to the weld puddle.
- Orbital/tube arc welding is a particular type of arc welding for the adhesion of metal tubing, piping, or round bar.
- Plasma arc welding uses a collimated plasma stream to fuse workpieces and filler alloys. A plasma stream is expelled through the tool, transferring the arc to the workpiece. This type of welding provides high heat to a small area producing a strong weld.
- Shielded metal arc welding (SMAW), or stick electrode welding, relies on the flux covering the electrode to melt during welding, forming gas and slag that shield the arc and molten weld pool. Upon completion, the slag must undergo finishing and the flux serves to add scavengers, deoxidizers, and alloy elements.
- Stud/nut welding utilizes a threaded fastener on the end of the welding gun.
Types of Resistance Welding
Resistance welding is a type of welding where the heat to weld surfaces is formed by the electrical resistance of the material. Factors to a piece's resistance include: surface coating, electrode materials and geometry, electrode pressing force, and weld current and time. Pools are formed at points of electrical resistance as a current is passed through the metal. These methods produce little pollution and are best suited for thin materials.
- Flash welding uses a series of flashes or arcs between two components of similar cross sections and shapes along with clamping pressure. Parts are attached to electrically insulated platens. One platen oscillates to create flashing or arcing action when the power source is connected. Flash welding is a combination of melting and forging processes that produces high quality welds. It is used widely in the aerospace industry.
- Spot welding heats contact points or spots to fuse adjacent materials. This welding process is easily automated at high production rates, and is best suited for lightweight metals.
- Related to spot welding, projection welding relies upon raised sections or projections on the workpieces for a connection. Current flow is directed at these projections, which can form quality welds on heavy, cumbersome substrates. This process is common when welding hardware to metal plates, as well as joining wires and bars. Dimples or embossed projections are helpful for sheet metal welding.
- Seam welding produces an overlap or butt weld, typically by a wheel-like electrode. High frequency power supplies are used in welding tube or coil seams because a higher percentage of current flows through the edges of a material at high frequencies.
- Flash welding does not use any filling metal. The workpieces are set apart based on thickness, material, and weld quality, and the void between the pieces produces the arc to melt the metal. Pressure is then applied to forge the bond.
- Upset welding requires the substrates to be clamped and to have matching cross-sections. Pressure is applied along the seam, and flash welding begins. As the seam has been heated to a forging temperature, the current is interrupted. The heat and pressure bring forth coalescence.
Types of Frictional/Fusion Welding
Friction welding is a forging technique relying upon the heat created from friction between a moving workpiece and a stationary workpiece, along with a lateral force to displace and fuse the workpieces. No actual melting occurs. Fusion welding includes a heat source to raise the materials to melting point and uniting the workpieces, typically with a filling material to ensure a strong bond.
- Electron beam welding uses a narrow, concentrated energy source to melt a narrow joint in the workpieces. This minimizes any heat stress on the materials, and the weld can be completed without the use of material fillers. This process requires a vacuum atmosphere to prevent the absorption of electrons by the air.
- Hot plate/plastic welding is used to merge thermoplastic materials. The workpieces are pressed against the hot plate, removed, and then compressed together. Direct contact and conduction heating is most common, but infrared, convection, and dielectric heating are also suitable hot plate welding heat sources.
- Laser welding uses a laser beam to melt the workpiece. Laser beams provide a very narrow, concentrated energy source that melts a narrow region, resulting in a minimal heat affected zone. The welds can be made without filler metals or consumable electrodes.
- Oxyfuel welding procedures require a fuel gas and oxygen to meld substrates. Pure oxygen is used to increase flame temperature, and typical fuels include acetylene, propane, and hydrogen. This process is becoming less common in industrial applications, but is still used in welding pipes and tubes.
- RF welding, or radio frequency welding, places two polymer workpieces on a table press with dies to direct the welding. High frequency waves are directed at the intended joint, and the molecules of the material vibrate rapidly and generate heat. The weld takes the shape of the die. This process is fast, and PVC, polyurethane, nylon, and PET are most commonly welded by this process.
- Thermite/exothermite welding uses an exothermic chemical reaction process to weld components together. A metal powder, which releases a great deal of energy (highly exothermic) when reacting with oxygen, is combined with the metal oxide with a much lower heat of formation. For example, powdered mixtures of aluminum metal and iron oxide are loaded into the weld seam or joint and ignited. The aluminum strips the oxygen away from the iron oxide leaving behind a deposit of iron and aluminum oxide.
- Ultrasonic/linear friction welding utilizes ultrasonic vibration or reciprocating linear motion between workpieces to form a weld. Pieces are clamped under force between the welding tip connected to an ultrasonic transducer and an anvil. The process can be used to conjoin dissimilar metals and plastics.
Types of Brazing and Soldering
Brazing is a process where a filler metal is brought to its melting temperature in the presence of a flux, and joins two close-fitting metal parts via capillary action. Soldering is a similar in nature to brazing, but it is conducted at a lower temperature. In both brazing and soldering, the workpieces do not experience any melting.
- Gas torch brazing utilizes a combustible gas to heat the workpiece and melt the filler alloy. The alloy melts and flows across the heated workpieces joint, forming a metallurgical bond once cooled.
- Hot rod/iron brazing heats the workpieces themselves to melt the filler alloy, though no endothermic processes occur to the workpieces.
- Hot dip brazing/soldering immerses the workpieces in a molten bath of filler alloy. The molten filler alloy wets and flows across the heated work surface, or is pulled into the joint by capillary action. Excess filler alloy runs off as the part is pulled from the molten bath.
- Induction brazing uses an induction heating source to heat the workpiece and melt the braze filler alloy. A high frequency power supply and induction coil induces current flow in the workpiece and causes internal resistance heating. The molten braze alloy wets and flows across the heated work surface.
- Infrared soldering/brazinguses infrared or furnace heat to melt the braze or solder filler alloy. It is also called reflow brazing/soldering because the filler alloy is pre-applied, and then reflowed during assembly.
- Laser brazing/soldering heats the workpiece by laser technology, which heats the filler alloy to form coalescence.
- Wave solderinguses a molten solder bath with a traveling wave. Printed circuit boards (PCB) are positioned so that the terminations just touch the solder wave, preventing the deposition of excess solder on the PCB. Wave soldering machines consist of a fluxing unit, a pre-heater, and a solder wave. The pre-heater heats the board and component termination prior to soldering, activating the flux and removing any solvent or water from the PCB. The board is passed over a wave of solder which laps up against the bottom of the board to wet and solder the metal surfaces to be joined.
- Resistance brazing/soldering uses resistance heating to heat the workpiece and melt the braze filler alloy. Contact tips or horns clamp onto the part and pass current through a point adjacent to braze joint, causing internal and contact resistance heating.
Why Metal Welding is a Preferred Manufacturing Process?
Excellent Strength of Joints
One of the most significant benefits of metal welding is the stronger binding. The heat and pressure applied during the welding process cause the metal to melt and fuse together as the metal cools and solidifies, forming a solid joint between the parent metals. The original strength does not depreciate, but it might increase when using filler materials. However, the joint strength also depends on other factors: weld quality, the strength of the parent material, and operator skills. Welding offers high joint strength than riveting, bolting, and adhesion joining. The melting and solidification in the welding position create highly rigid and strong bonds, making it ideal for high-stress applications.
High Precision Control with Welding
Precise metallic joints are possible with welding techniques. It allows for accurate control of the weld location and size. There are different specialized equipment and techniques to achieve precise welding. For example, Gas Tungsten Arc Welding, one of the most precise welding techniques, can maintain welding tolerances as low as ±0.005 inches. In addition, other approaches like TIG welding, MIG welding, and laser welding are also renowned for their precision and accuracy. The shape and size of the weld can be controlled by adjusting the welding parameters, such as current, voltage, feed rate of filler, electrode size, and shielding gas composition, even on complex or irregularly shaped parts. Welding is considered to be the most precise method of joining metal parts together, followed by bolting, riveting, and adhesion. Therefore, welding is preferred until there is a requirement for other specific joining methods based on materials, the size and shape of the parts, and the desired outcome.
Welding Speed
There are no other permanent metal joining techniques besides quick and less time-consuming welding. It takes a much shorter time to create welding joints, especially when compared to the time required to drill and tap holes for bolts or to place and secure rivets. Since welding is a continuous process, it can weld an entire joint in one go, unlike riveting and bolting. This can significantly increase the speed of the manufacturing process, especially for complex structures. Automation is another factor that has contributed dramatically to the welding speed in manufacturing. The TIG–MAG hybrid arc welding speed could reach up to 3.5 m/min.
Welding is a Cost-effective Approach
Welding produces less material wastage during the joining process. It involves fusing two pieces of metal together, which means less material is required to create a joint than other methods, such as bolting or riveting. It also requires fewer labor hours and does not require any additional maintenance. All these factors reduce the project's overall cost, making it a preferred manufacturing process in many industries, especially for high-volume production and large-scale projects.
Superior Lifespan of Joints
The lifespan of welding joints is longer than the base (or parent) metals. Welding creates a metallurgical bond between the two pieces of metal, distributing stress more evenly across the joint and contributing to durability. Because of this, welded joints offer high resistance to vibration, impact, and thermal effects. The type of welding used has a critical role in deciding how long any welding joints will last. Stick welding is renowned for its sturdiness and longevity in manufacturing processes. Although, other techniques like TIG and MIG also create a durable metallic joint that lasts almost equal to that of base metals.
Weld Requires Low (or No) Maintenance
Welding creates permanent joints between metallic pieces. They do not require additional maintenance (or low maintenance over time). In contrast, other types of joints, such as those created with mechanical fasteners, may require regular tightening or replacement of the fasteners. Welding only requires general and inexpensive maintenance, such as cleaning or painting, to prevent rust and corrosion. And that is limited to a few applications.
Joining of Dissimilar Metals
Dissimilar metal parts or pieces can be joined together using welding techniques. TIG, MIG, Friction stir welding (FSW), and other welding techniques are popular in manufacturing to join dissimilar metals like aluminum and steel. The appropriate filler material is essential in such cases; a filler composition compatible with both different metals can be used to create the weld. There could be some issues while applying to weld for dissimilar materials, cracking, warping, or poor weld quality. However, several techniques address these issues, such as pre-heating of base metals, correct weld sequence, and feed rate of filler.
Aesthetic Aspect
After the welding process is complete, the surface of the welded joint might have surface defects such as porosity, undercutting, or excess weld metal. These defects can be removed through grinding, sanding, or other surface finishing techniques. With post-processing, welding joints do not alter the aesthetic view of the welding position. In comparison, other types of joints, such as rivets and bolts, change the appearance of parts. It can be used to create beautiful and intricate designs & art, such as sculptures, furniture, and other decorative objects. Welding is also valuable for engraving automotive logos, trademarks, and other signs.
Our Certificate
The company's research and development department has obtained a total of 30 invention and utility model patents at home and abroad.
Frequently Asked Questions About Metal Welding Service
Q: What is TIG welding?
Q: What is MIG welding?
Q: What is a metal welding process?
Q: What is it called when you weld metal?
Q: What is the strongest weld for metal?
Q: What metal can you not weld?
Q: How thick of metal can you weld?
Q: When should you stop welding?
Q: Can rusty metal be welded?
Q: What is the safest metal to weld?
Q: What type of welding is most in demand?
Q: What is Stick Welding?
Q: What is Stick Welding Used For?
Q: Which is stronger stick or MIG welding?
Q: What is Plasma Arc Welding?
Q: How often should welding equipment be serviced?
Q: What is the meaning of metal welding?
Q: How is metal welding done?
Q: What do you use for metal welding?
Q: Can you weld any metal together?
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