Search This Blog

Hitachi LMG6911RPBC-E

# LMG6911RPBC-E Hitachi LMG6911RPBC-E New LMG6911RPBC KOE 5.7 inch LCM 320×240 6:1 Monochrome CCFL Parallel Data, LMG6911RPBC-E pictures, LMG6911RPBC-E price, #LMG6911RPBC-E supplier ------------------------------------------------------------------- Email: sales@shunlongwei.com https://www.slw-ele.com/lmg6911rpbc-e.html ------------------------------------------------------------------- Panel Brand:  HITACHI Panel Model : LMG6911RPBC   Panel Size : 5.7 inch Panel Type STN- LCD , LCM  Resolution: 320×240 , Q VGA   Pixel Format Rectangle Display Area: 115.17(W)×86.37(H) mm Bezel Opening 122.0(W)×90.0(H) mm Outline Size 167.1(W)×109(H) mm Brightness - Contrast Ratio 6:1 (Typ.) (TM)     Viewing Angle - Display Mode STN, Blue mode (Negative), Transmissive  IP

How to prevent deformation during slow wire processing

 Slow-moving wire processing is a very exquisite and exquisite craft, and sufficient preparations need to be made, so that the processed products can be more quality. The slow-moving wire processing technology has a wide range of applications and is a must in our industries. If you want to do better with less technology, you must master all aspects of the processing knowledge. For example, the most common thing is the deformation during processing.  How can we solve it How to prevent deformation during slow wire processing Speaking of slow wire processing, it uses continuously moving fine metal wires as electrodes. Pulse spark discharge is performed on the workpiece, where it generates a high temperature above 6000 degrees. Moreover, if it wants to improve its quality problems and prevent its deformation, it can firstly start from the following aspects. 1. To prevent deformation, it is impossible for the material to have no internal stress. In particular, the internal stress of the que

What are the advantages of CNC machining of radiator parts?

For friends who have been in contact with the radiator component industry, they often see or hear "CNC machining", but too much exposure does not necessarily mean that many people understand. In fact, many questions are still about CNC machining. What are the advantages? Let's take a closer look. CNC machining is an index-controlled machine tool machining, which is a method of using digital information to control the machining process. Traditional mechanical processing is done manually by machine tools. During processing, the mechanical cutter is shaken to cut metal, and the accuracy is measured with calipers and other tools. However, traditional artificial intelligence processing is far from being able to meet the needs of production development. Therefore, the emergence of CNC machining provides the possibility for the standardization, precision and efficiency of mechanical product processing. The CNC machining process in the radiator component industry also shines. The

Machining Precision in the CNC Machining Industry

We are exposed to processing every day, and we often mention precision in this process. But is your accuracy correct? Or do you mean "rigorous"? Next, let's follow "Shenzhen China" to learn those things about precision!

The so-called machining precision refers to the actual size, shape, position of the machined part surface and the ideal geometric parameters required by the drawing! For ideal geometric parameters, the accuracy of dimension refers to the average size; the accuracy of shape refers to absolute circle, cylinder, plane, cone and straight line; the accuracy of mutual position refers to absolute parallelism, verticality, coaxiality, symmetry, etc.

 

1、Dimension accuracy
The so-called dimensional accuracy refers to the correspondence between the actual size of the part after processing and the tolerance zone center of the part size.

2、Shape accuracy
The so-called shape accuracy refers to the degree of the actual geometry shape of the machined part surface and the ideal geometric shape.

3、Position accuracy
The so-called position accuracy refers to the actual position accuracy difference between the relevant surfaces of parts after processing.

4、Interrelation
When designing machine parts and specifying the machining precision of parts, it is usually necessary to control the shape error within the position tolerance, and the position error should be less than the dimension tolerance. This means that the shape accuracy of precision parts or important surfaces of parts needs to be higher than the position accuracy requirements, and the position accuracy requirements need to be higher than the dimensional accuracy requirements.

 

The so-called machining error refers to the deviation between the actual geometric parameters and the ideal geometric parameters. Among them, the size of machining error reflects the level of machining accuracy, the larger the error, the lower the machining accuracy; the smaller the error, the higher the machining accuracy.

 

Brief introduction of machining precision
"Machining accuracy" is a term, which is mainly used to produce products. Both machining accuracy and machining error are used to evaluate the geometric parameters of machined surfaces. Among them, the machining accuracy needs to be measured by the tolerance grade. The smaller the grade value is, the higher the accuracy is; while the machining error is expressed by numerical value, and the larger the value, the greater the error; that is, the higher the machining accuracy, the smaller the machining error, and the lower the machining precision, the higher the machining error.

 

There are 20 tolerance levels, from IT01, IT0, IT1, IT2, IT3 to IT18. Among these grades, IT01 indicates that the machining accuracy of the part is the highest, and IT18 indicates that the machining accuracy of the part is the lowest, and generally IT7 and IT8 are the intermediate grades of machining accuracy.

 

It should be noted that no matter what processing method is used, the actual parameters obtained will not be absolutely accurate. From the function of parts, if the machining error is within the tolerance range required by the part drawing, then the machining precision is considered to be guaranteed.

 

Difference between accuracy and precision:
1、Accuracy
When the accuracy is small, the average value of the measured data deviates less from the true value. But in the case of scattered data, that is, the size of accidental error is not clear.

2、Precision
Precision refers to the repeatability and consistency of the results obtained by repeated determination with the same spare sample. However, there may be high precision, but the accuracy is not accurate. For example, if the length of 1 mm is used for measurement, three results will be obtained, which are 1.051 mm, 1.053 and 1.052. Although their precision is high, the values are not accurate. Thus, accuracy refers to the accuracy of the measurement results, while precision refers to the repeatability and reproducibility of the measurement results. Among them, precision is the precondition of accuracy.

 

Methods to improve machining accuracy
Adjustment of process system
1)Adjustment of trial cutting method
Through a series of processes of "trial cutting – measuring size – adjusting cutter's cutting amount – cutting – re cutting", the process can be repeated until the required size is reached. However, the production efficiency of this method is low, so it is mainly used for single piece and small batch production.

2)Adjustment method
The adjustment method obtains the required size by pre adjusting the relative positions of the machine tool, fixture, workpiece and tool. However, due to its high productivity, this method is mainly used for mass production.

Reduce the error of machine tool
1)In order to improve the manufacturing accuracy of the spindle components, the rotation accuracy of the bearing should be improved
①High precision rolling bearings are selected;
②high precision multi oil wedge dynamic pressure bearings are used;
③high precision hydrostatic bearings are used

 

The accuracy of accessories with bearings should be improved
①It can improve the machining accuracy of box support hole and spindle journal;
②It can improve the machining accuracy of the surface matching with the bearing;
③By measuring and adjusting the radial runout range of the corresponding parts, the error can be compensated or offset.

 

2)Proper preloading of rolling bearings is required
①Clearance can be eliminated;
②Increase of bearing stiffness;
③Homogenize the rolling element error and reduce the transmission error of transmission chain
1)Less transmission parts, short transmission chain and high transmission precision;
2)Through the use of speed reduction transmission, this can ensure the important principle of transmission accuracy. And the closer to the end of the transmission pair, the smaller the transmission ratio;
3)The accuracy of the end piece needs to be higher than that of other transmission parts.

Reduce tool wear
It is necessary to regrind the tool before the tool size wear reaches the stage of sharp wear.

 

If you are interested in our products, you are welcome to send your requirements with your drawings to us via email. We are very glad to give you the most favorable quotation. If so, our email is: [email protected],Click on the email address on the left to send us an email quickly and easily

Link to this article:Machining Precision in the CNC Machining Industry

Reprint Statement: If there are no special instructions, all articles on this site are original. Please indicate the source for reprinting.:Cnc Machining,Thank

Contact Us


Get In Touch or Get A Quote

Need an expert? you are more than welcomed to
leave your contact info and we will be in touch shortly
YOUR COMPANY
Sifangyuan Industrial Park, Xinshapu, Huaide Community
Humen town, Dongguan City, Guangdong Province. 
860769-82886112
860769-82886112