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1.Q:Advantages of CNC machining

A:CNC machining is very suitable for the application of the prototype industry and the prototype production in your early product development. This is also the most mainstream production process. The following are the advantages and disadvantages of CNC prototype processing:

· High precision

· You can choose a variety of materials to process various plastics, metals, woods, foams, etc.

· Fast processing speed, can quickly realize the conversion from 3D image files to physical objects.

· The prototype produced can have the same performance as the product produced by the mold.

· Low production cost and simple fixing.

· Quick response and short cycle.

· Our company has 11 years of experience in CNC prototype processing, and has accumulated rich experience in various fields including automobiles, household appliances, medical care, intelligence, etc., and can produce prototypes quickly, efficiently, and at low cost.

2. Q:What are the features of CNC turning?

A: The features of CNC turning are as below---------

1.   CNC lathe can operate automatically the main shaft speed change,positive and negative rotate,start or stop,feeding and moving along the two coordinate direction,loose,transposition and clamp the knife rest,control the cutting fluid,etc.

2.   The feeding of turning tools should establish relationship with the rotating of main shaft.Because the CNC turning is calculated by the pulse equivalent that the turning tools moving along the feeding direction when the main shaft rotate a circle.

3.   Because the design drawing of components are indicated and measured by diameter data,to improve the precision of radial dimension,make the programming and measuring easier,the pulse equivalent on X axis will be half of on Z axis.

4.   When use horizontal type CNC lathe to machining components,to ensure the machining precision and surface quality,the main shaft should have a large speed adjustable range.It can use both constant surface speed and constant rotate speed for machining.

5.   The workblank for CNC turning is always rough blank and die forging.The machining allowance is large.So the CNC lathe will have different fixed cycle function.It can process kinds of turning machining.

3.Q: What is CNC machining process? 

A: CNC Machining is a process used in the manufacturing sector that involves the use of computers to control machine tools. Tools that can be controlled in this manner include lathes, mills, routers and grinders. The CNC in CNC Machining stands for Computer Numerical Control. On the surface, it may look like a normal PC controls the machines, but the computer's unique software and control console are what really sets the system apart for use in CNC machining. Under CNC Machining, machine tools function through numerical control. A computer program is customized for an object and the machines are programmed with CNC machining language (called G-code) that essentially controls all features like feed rate, coordination, location and speeds. With CNC machining, the computer can control exact positioning and velocity. CNC machining is used in manufacturing both metal and plastic parts.

2.Q: What is electrophoresis? 

A: Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field. The technique applies a negative charge so proteins move towards a positive charge. It is ultimately caused by the presence of a charged interface between the particle surface and the surrounding fluid.

3. Q: What is zinc phosphating in surface treatment? 

A:Zinc phosphating is used to coat ferrous metals to provide rust-proofing and, when applied in conjunction with sealers, superior corrosion protection.  Zinc phosphate is a lighter coating than manganese phosphate and is used as an alternative coating for high wear parts.  Phosphate coatings are porous, making them ideal for surface preparation for additional coatings and painting. The zinc phosphate coating protects the underlying part surface from wear, corrosion, and rust.

4. Q: What is Passivation? 

A:The passivate process is designed to remove foreign metals and oils (usually from machining) from the surface of stainless steel. The end finish will not change the dimension of the part nor the overall appearance of the base metal. Passivation purifies the surface of a machined part and therefore improves corrosion resistance.

5: Q: What is electropolishing? 

A: Electropolish is a type of finish that smoothens, polishes, deburrs, and cleans stainless steels. The first advantage to this finish that you will notice is that unlike regular polishing methods you will not have any grain lines or left over materials such as polishing rouge.

6: Q: What is the difference between electropolishing and mechanical polishing? 

A: Electropolishing is an electrochemical process while mechanical polishing is a mechanical process. Electropolishing is a surface treatment that can improve surface finish as it dissolves material from the surface.Mechanical polishing, like machining, alters a surface by cutting material away from the surface. Electropolishing can improve a surface finish on a microscopic level while mechanical polishing can improve a surface finish on a macroscopic level.

7. Q: What is black zinc plating? 

A: Black zinc plating is used to provide corrosion protection and anti-galling properties to parts in high wear, high temperature, and corrosive environments.  It is achieved by applying zinc plating followed by black chromate conversion plating. The result is a uniform, durable coating providing corrosion and wear resistance as well as anti-galling properties. The surface color can range from matte to different iridescent hues. Black zinc plating is thicker than other plating methods, which may affect the dimensions of tight fitting parts.

8. Q: What is electroless nickel plating? 

A:Electroless Nickel Plating, also known as EN or E/Ni, can be plated over a wide variety of metals including aluminum, titanium, mild steels, stainless steel, hardened steel, copper, brass and zinc die-cast. Electroless nickel plating provides: 

● Uniform coating on most complex,and/or Irregular surfaces

● Improves resistance to galling

● Provides a hard, wear resistant surface

9. Q: What is zinc plating? 

A: The zinc plating process offers several advantages to the metal. Zinc plated characteristics include an increase in corrosion resistance (comparable to cadmium) with an addition increase in resistance when chromates and sealers are used during the process. By zinc plating metal, it prolongs the life of the basis metal improves aesthetic value of the part and serves as a good paint base. Additionally, zinc plating services increase the lubricity and can be used for identification purposes when combined with chromates and dyes.

10.Q: What is copper plating? 

A: Copper Plating provides a coating which is reddish in appearance. Copper can range from a matte to bright finish which is often depends on the surface brightness of the part. This finish provides good corrosion resistance, but also has the tendency to easily tarnish. Copper is a great coating for solderabilty of small parts, and it also provides an economical finish for parts that require low electrical resistance.

11.Q: What is gold plating? 

A: Other than its aesthetic appearance, gold plating has many useful characteristics. The first being that it provides excellent corrosion and tarnish resistance. Second, gold plating is a great finish if conductivity is a major concern. One of the important characteristics of gold plating is that it has an extremely low contact resistance for electricity. Lastly, gold provides a great finish for solderabilty. 

12. Q: What is phosphate coating&oil coating? 

A:Phosphate is a coating that is often used on steel parts in order to provide corrosion protection, lubricity, or as a pretreatment for further coatings such as paint or powder coating. Typically, once a part has been phosphated, a further coating of oil is applied which will further increase the corrosion protection of the part. The finish provided by the phosphate coating will be gray to black in appearance.

13. Q: What is sandblasting? 

A: Sandblasting is the use of compressed air as a driving force, to form a high-speed jet beam spraying material(copper sand,quartz sand, corundum,sand and sand) high speed ject to be required to deal with the surface of the workpiece, the outer surface of the workpiece surface appearance or shape change, due to the impact of abrasive on the surface of workpiece and cutting, workpiece the surface of a certain cleanness and different roughness, the mechanical properties of the workpiece surface is improved, thus improving the fatigue resistance of the workpiece increases between it and the adhesion of the coating and prolong the durability of the coating film, and is also good for coating leveling and decoration.

14.Q: What is black oxide coating? 

A: Black oxide coating is a process which provides a conversion coating on iron which changes the surface of the material to a naturally occurring black iron oxide. Though the black oxide plating does provide some corrosion protection by itself it is necessary to put a protective oil on this finish to keep it from rusting.

15. Q: What is Galvanic plating ? 

A:Its application is rich in metal product. The main process is to put the parts into the chemical plating solution.  According to the different needs of customers, the parts can be plated into different colors, with high gloss silver, silver, gray silver. Its conductivity of the electroplated product significantly enhanced. How to deal with some components required insulated?  There are two ways: First, to paint insulating oil on required area of the part. Of course, coated with insulating oil area will be black, it is not suitable as appearance side.  Second, to coved with special adhesive paste, to protect them, the same effect can be achieved. 

16. Q: What is vacuum plating?  

A: Generally applicated to a wider range, such as stainless steel sheet and plastic products. Because of its complex process, high environment & equipment requirements, high cost, its price is more expensive than galvanic plating.  its process is : product surface cleaning -> spray primer -> baking primer -> vacuum coating -> spray paint -> baking finish -> packaging  The vacuum plating can be divided into general vacuum plating, UV vacuum plating,  The process consists of evaporation, sputtering, gun color and so on.

17. Q: What is powder coating? 

A: Powder coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electorstatisticaly and is then cured under heat to allow it to flow and form a “skin”. The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals. 

18. Q: What benefits does 5-axis CNC Machining have?

1. Complex Shapes

The major (and most well-known) advantage of five-axis machining is ability to machine complex shapes. The additional movement creates machining angles and arcs that were only previously possible with a multitude of special fixtures or additional setups.

2. Fewer Setups

Five-axis machines can machine nearly every visible surface, excluding the bottom or clamping area. This breadth of ability significantly reduces the need for multiple setups or special fixtures. Of course, another big benefit of fewer (or ideally one) setup is…

3. Relational Accuracy

Imprecision finds a way to seep in with every setup change. Once a part comes out of the machine, precise alignment is lost. By using the same “zero” or “home” location, feature-to-feature accuracy is improved.

4. 3+2 Axis Machining

There are parts that can only be machined with simultaneous 5-axis movement. Then there are parts that are more efficiently machined with 3+2 movement.

In 3+2 machining, the fourth and fifth axes are used to locate the work piece (or cutting tool, depending on the type of machine) in a fixed position. In these scenarios, there is no need for all five-axes to move simultaneously.

The same tool paths could have been achieved in a three-axis machine, but only after loading and unloading between multiple setups, fixtures, or machines. The five axis machine increases uptime, decreases human error, and eliminates the need for special fixtures. For parts with features or holes on multiple faces or angles, 3+2 machining is the clear choice.

5. Better Surface Finish

Using the rotating fourth and fifth axes, the part can be orientated to bring it closer to the cutting tool. If the part can get closer to the cutting tool, then the cutting tool can be shorter. A shorter cutting tool is less susceptible to vibration at higher cutting speeds, which directly impacts surface finish.








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