What is the reason for the presence of deep grooves in metal parts?

The phenomenon of deep groove in the processing of parts is caused by many reasons, such as equipment, tools, processing methods and blanks, etc., once the failure cause may cause deep groove in processing. The difference between the spiral line and the straight line of the deep groove mark, the difference between the whole circle and the part, the difference between the left and right and the top and bottom are all the differences in the causes of failure, which are as follows:

1. Equipment reasons.

The equipment leads to the phenomenon of coveted knife marks in machining, which mainly involves five parts, namely the spindle, the spindle broach holder, the worktable tightening tooling, the screw and the gain parameters of the screw rod.

2. The reason for the tool.

There are defects in the tool itself, defects in the use of the tool, and the utility of the tool is unreasonable.

3. Unreasonable process arrangement will also cause tool marks, such as when the tool diameter of the face milling cutter is not large enough when the tool diameter is not large enough when the face milling cutter is machining the plane, the single-sided machining allowance can not cut the entire plane, and the tool path causes overlap.

4. Blank reason.

The blank material is too hard, and the difference in elastic deformation around the machined material affects the withdrawal marks of the tool.

There are separate deep grooves on the machined surface. It will be the source of stress concentration in use. Leads to fatigue breakage.

Low hardness, high plasticity, small cutting speed or increased cutting thickness of the part can cause the rake face to form a built-up nodulum. Because the metal with nodules is strengthened by severe deformation during the formation process, its hardness is much higher than that of the metal being cut, which is equivalent to a round and blunt edge and sticks out of the cutting edge, leaving longitudinal irregular grooves on the machined surface.

The cause is periodic runout of the workpiece or tool of the machine. Vibration is a universal phenomenon in the universe, which is generally divided into macroscopic vibrations (such as **, tsunami) and microscopic vibrations (thermal motion of elementary particles, Brownian motion). Some vibrations have a relatively fixed wavelength and frequency, while others do not.

Two objects with the same vibration frequency, when one object vibrates, the other object can produce the same frequency of vibration, this phenomenon is called resonance, and the resonance phenomenon can bring many benefits and harms to human beings. Different atoms have different vibrational frequencies and emit spectra of different frequencies, so the spectrum analyzer can be used to find out which elements a substance contains.

At room temperature, the magnitude of the particle vibration amplitude determines the form of the substance (solid, liquid, and gaseous). Different substances have different melting points, freezing points, and vaporization points, which are also determined by the different vibrational frequencies of the particles. Normally, the air temperature is the vibration amplitude of air particles.

Any vibration requires energy, and without it there is no vibration.

Absolute zero, which is defined by physics, is the temperature at which even elementary particles cannot vibrate, and is also the lowest temperature in the universe. The principle of vibration is widely used in **, construction, medical, manufacturing, building materials, detection, military and other industries, there are many small branches, and the in-depth study of any branch can promote the development of science and promote social progress.

The main reason for decarburization is that the heating time is too long! The overskin phenomenon you are talking about is oxide scale!! Don't know what furnace you use for quenching?

Generally, metal parts are made of steel, while rigidity is made of pig iron and carbon, and heating may separate the carbon and iron on the surface.

High pressure at work. Nervous concentration.

Relax and unwind.

The joint mark when machining the plane is the shortcoming of the milling process, which is mainly manifested in:

1.The production efficiency is high but unstable.

Because milling is a multi-edge cutting and a large cutting speed can be selected, the milling efficiency is high. However, due to various reasons, it is easy to lead to uneven load and inconsistent wear of the cutter teeth, which causes the vibration of the machine tool, resulting in unstable cutting, which directly affects the surface roughness of the workpiece.

2.Intermittent cuts.

The impact generated when the milling cutter teeth are cut in or out, on the one hand, reduces the life of the tool, and on the other hand, causes periodic shocks and vibrations. However, due to the intermittent cutting of the cutter teeth, the working time is short, and the cooling time in the air is long, so the heat dissipation conditions are good, which is conducive to improving the durability of the milling cutter.

3.Semi-enclosed cutting.

Since the milling cutter is a multi-tooth tool, the space between the cutter teeth is limited, if the chips can not be discharged smoothly or there is enough chip groove, it will affect the milling quality or cause damage to the milling cutter, so the chip groove should be considered as an important factor when choosing a milling cutter.

It should be operated continuously, if it cannot be continuous, the knife should be adjusted to the starting position and walked again, and the same is true for senior lathes.

It may be that the perpendicularity error between the axis of the spindle and the table surface is large.

It's best to send the program up to see if there is conventional milling during processing.

Yes, it may be that the perpendicularity between the center of the spindle and the worktop runs off.

The longer the tool generated by the machining side stress, the greater the amount of machining, the more obvious it will be.

It is a coolant that cools the tool and has the effect of removing debris from the tool and preventing rust. There is a special formula, tap water is not to be used, it will cause rust.

Tap water is sufficient, and the function is to cool down. Due to the high temperature generated during the cutting of the lathe, if the temperature is not cooled, the raw material may be deformed due to the high temperature.

It is ordinary cold water, which plays a cooling role.

For example, color plates used in building houses: iron blocks, hot-rolled pickling, cold-rolled galvanizing, painting.

Look at the outer surface of the part and judge that this piece is a casting. If you can see the actual thing, look at the groove to see if there are organic cutting marks, if not, the groove may be cast. If so, it may be processed by professional equipment or hand-held power tools.

There is a computer gong with an extended drill and milling cutter to get it, you can also set up the workpiece in the direction of the dotted line to clamp, use the T-shaped slot cutter to mill, according to what structure in the groove with what shape of the knife, you can't see it here.

It must have been milled and milled.

Can't you see clearly, is the bottom of the groove nearly perfectly round?