In digital milling, will the feed rate and rotational speed affect the tolerance size, why 10

Yes, the feed speed is large, the amount of cutting is large, the force on the main bearing of the equipment is large, the equipment spindle will shake or flick the knife (the equipment has tolerance to match), the tolerance will be large, even if the feed and speed are within the allowable range, the tolerance will also have a certain change, but it will not be too large, in the case of the same feed speed, the larger the speed, the higher the finish, but it is easy to burn the knife or collapse the knife, high speed, generally used for finishing (small amount of cut).

The increase of feed rate and rotational speed will increase the deformation of the tool and the workpiece, and the processing heat will also increase, which will affect the final size. Of course, it also affects the surface quality. In cases where tolerance requirements are more extensive, these effects are not sufficient to cause quality problems.

Yes, so when machining precision dimensions, it is necessary to make a few more cuts. And the feed should be slow! The rotational speed is lower than the normal machining.

When the feed is fast, the surface finish of the workpiece will not be too good. If you slow down a little bit, it will still be gone.

And the effect of forward and conventional milling is also different.

The ratio of the number of milling speed and feed speed is determined by the specific workpiece material and tool, in general, the speed should be lower than the feed rate, when the speed is greater than the feed rate, it will cause the cutting macro force to become larger, the machining surface is rough, the tool is seriously damaged and even broken. key or.

Spindle speed = 1000vc d

The selection of tools and the determination of cutting amount is an important part of CNC machining technology, which not only affects the processing efficiency of CNC machine tools, but also directly affects the processing quality.

In the traditional cutting mode, the cutting speed is always based on the selected cutting depth and feed rate, under the condition of ensuring the reasonable durability of the tool, choose a more reasonable value, because the cutting speed has a very obvious impact on the durability of the tool, and under normal circumstances, increasing the cutting speed will greatly reduce the durability of the tool.

According to the theory of Salomon high-speed machining, when the cutting speed is increased to a certain value, the cutting heat and cutting force that affect the durability of the tool are reduced to varying degrees, so as to improve the cutting conditions to a certain extent.

The cutting speed vc can be calculated by giving a constant linear speed, i.e. using g96 sxx, the formula vc = dn 1000 is obtained in meters minutes.

The unit of feed speed G98 F100 is mm min (indicating 100mm feed per minute), and the unit of g99 is mm n (indicating that the spindle is fed for each revolution, and the relevant axis is fed.

1. Feed speed is an important parameter in the cutting amount of CNC machine tools, which is mainly selected according to the machining accuracy and surface roughness requirements of the parts and the material properties of the tool and workpiece. The maximum feed rate is limited by the stiffness of the machine and the performance of the feed system.

Second, the principle of determining the feed rate: when the quality requirements of the workpiece can be guaranteed, in order to improve the production efficiency, a higher feed rate can be selected.

3. Generally selected in the range of 100-200mm min; When cutting, processing deep holes or processing with high-speed steel tools, it is advisable to choose a lower feed speed, generally in the range of 20-50mm min.

3. When the machining accuracy and surface roughness are high, the feed speed should be smaller, generally within the range of 20-50mm min; When the tool is idle, especially when the tool is "back to zero" at a distance, the maximum feed rate set by the CNC system of the machine can be set.

4. Cutting speed VC (cuttingspeed) - is the instantaneous speed of a certain point on the cutting edge of the tool relative to the surface to be machined in the direction of the main movement.

Fifth, the cutting speed is always based on the selection of good cutting depth and feed speed, in order to ensure the reasonable durability of the tool, choose a more reasonable value, this is because the cutting speed has a very obvious impact on the durability of the tool, in general, increasing the cutting speed will greatly reduce the durability of the tool.

6. In traditional machining, the feed rate is limited by the cutting speed and the rigidity of the process system, and the value is generally small; However, in the high-speed machining method, the cutting force and cutting heat are reduced due to the increase of cutting speed, which makes it possible to choose a larger feed rate when machining small residual materials.

The milling cutter and BAI speed are directly proportional to the relationship between the speed and the feed.

Therefore, a specific feed cannot be given here, and a specific value needs to be balanced according to the material to be processed back and the machine used. Choosing a tungsten carbide milling cutter from Germany can provide technical support for machining difficulties and help to improve and optimize cutting data, thus maximizing the efficiency of the tool!

Throughout the manufacturing industry, right-hand tools are often used for machining, and in the case of milling cutters, the groove of the tool body determines the direction in which the chips cut off during milling are discharged. If you do precision parts, it is recommended to use left-handed tools, and left-handed tools need to have certain advantages in precision machining.

The following methods can be used to determine whether a tool is left-handed or right-handed. In the face of the vertical milling cutter, if the groove rises from the bottom left to the top right, this is the right rotation; If the flute rises from the bottom right to the top left, this is left-hand rotation. The right-handed rule can also be used for right-hand rotation, with the bent four fingers being rotated in the direction of rotation and the priry fingers being lifted in the ascending direction being right-handed.

The spiral flute is the chip containment and the part that makes up the rake angle and front of the cutter.

Left-hand milling cutter is generally a kind of tool selected under the demand of high-precision machining, left-hand milling cutter is generally used in mobile phone button processing, membrane switch panel, LCD panel, acrylic lens and other finishing. However, there are some high requirements, especially some mobile phone buttons or the production and processing of electrical panels, high precision and high finish requirements, it is necessary to choose the lower row of cutting, turn left, so as to avoid the phenomenon of whitening of the knife edge and jumping edge of the processing parts.

The rotational speed is directly proportional to the feed.

Therefore, it is not possible to give a specific feed here, and its specific value needs to be balanced according to the material being processed and the machine used. The German tungsten steel milling cutter can provide technical support for machining difficulties and help improve and optimize cutting parameters, and maximize the efficiency of the tool!

The selection principle of these milling quantities is: under the premise of ensuring the quality of milling processing, try to choose higher speed, larger feed and larger feed depth and other milling quantities (suitable for the performance of machine tools and milling cutters) to improve milling efficiency. In particular, when milling wood, it is necessary to fully consider the milling properties of wood, such as the feed per tooth fz is too small, which may cause scorching on the wood processing surface.

The general recommendation is fz=. The feed per tooth is recommended for smooth surfaces, medium surfaces, and rough or woodworking surfaces.

1. According to the material: white steel knife, tungsten steel knife, alloy knife, purple knife;

2. According to the cutter head: flat bottom knife: used for flat and straight side, clear plane angle;

Ball knife: used for various curved surface medium light, light knife;

Oxnose knife (unilateral, bilateral and five-sided): used for steel roughing;

Coarse leather knife: used to open rough, pay attention to the margin of retention.

3. According to the tool holder: straight rod knife, oblique rod cutter.

4. According to the blade: two edges, three edges, and four edges. The more blades, the better the effect, but the more work done, the speed and feed are adjusted accordingly, and the number of blades is longer and the life is long.

Generally general.

Copy says that the speed of the milling cutter is proportional to the feed. The diameter of the milling cutter is inversely proportional to the speed of rotation, while the feed is balanced between the two. The higher the speed and the slower the feed, the higher the processing finish and the lower the efficiency.

The faster the feed, the higher the processing efficiency, but the lower the finish.

The specific value needs to be balanced according to the material being processed and the machine used.

In general, the thicker the knife, the faster the feed, the faster the number of revolutions, the thinner the knife, the slower, the higher the number of revolutions, it is a matter of experience, and everything is understood after 1 month.

The spindle speed is how many revolutions the spindle rotates in one minute copy minute, and the cutting speed = (the circumference of the processed material, the speed) 1000, that is, vc = m min

Feed speed and feed volume are one element, but the calculation units are different, one is how many millimeters per minute (mm min) and the other is how many millimeters (mm r) per revolution. The relationship between the two is feed speed = feed speed i.e. vf = f n (mm min).

According to the formula: 1, n (spindle speed) vc (linear speed) * 1000 value) d (tool diameter);

2. f (table feed speed) fz (feed per tooth) * z (number of tool teeth) * n (number of spindle revolutions).

Rough boring spindle speed: 250 (carbide boring cutter rough boring cast aluminum general linear speed) * 1000 550 revolutions per minute, but this speed depends on the dynamic balance effect of your tool, which can be adjusted on this basis, which is between 400 and 800);

Rough boring feed speed: according to the amount of tools you eat on your back and the rigidity of the machine tool and fixture) * 2 (general rough boring cutter 2 teeth, depending on your specific situation) * 550 66 (according to the actual cutting situation, can be adjusted between 50 100);

According to the above method to calculate fine boring, the speed of fine boring line is slightly higher than that of rough boring 30 50, and the speed of fine boring is between 600 and 1500; The feed is between 50 120, depending on the actual situation, because there are other factors such as tool dynamic balance, fixture rigidity, machine tool rigidity, product parts rigidity and deformation, etc., the above is just theoretical data!