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Anonymous users2024-02-07You have to pay attention to these points.
1: Whether your workpiece is clamped too tightly on the fixture and turned, take it down and start to deform.
2: See if the spindle clearance of your machine tool is too large, you take a solid steel car and don't remove the outer circle, use a dial gauge to measure it to know whether there is a problem with the spindle.
3: If there is no problem with the above, it depends on whether the unilateral wall thickness of your workpiece blank is not, some are thick, and some are thin. After processing into a product, its unilateral wall thickness, the thin place will be a little thinner, if it is this kind of product, you need to cool the product before finishing and then finishing, so there should be no problem.
Because this kind of product is easy to deform when processed when it is hot, it will be deformed in thick places, and it will be deformed in thin places.
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Anonymous users2024-02-061 You clamp too hard.
2 You don't get it right.
3 Your sword is not in the center.
4 Your chip speed does not match your chip volume.
5 When you cut chips, you should dip the tip of the knife with foreign oil, otherwise the aluminum chips will nail the knife, etc.
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Anonymous users2024-02-05It should be the problem with your fixture, I don't know if you have two clamps. In that case, it's a misalignment.
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Anonymous users2024-02-04It is recommended that you do not take off the workpiece, measure the diameter on the tooling, if there is still an ellipse, then the spindle bearing should be replaced, if there is no ellipse on the tooling, take it down and have an ellipse, indicating that your tooling is to be improved.
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Anonymous users2024-02-03It is estimated that the tip of your knife is not in the same position as the workpiece.
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Anonymous users2024-02-02At the base of the 86353003, you are trying not to do aluminum parts, will there be the same problem, 1000 rpm car 1mm, what is the diameter of your car, generally, aluminum parts, the last fine turning, the amount of the car is about , do not need to be cold [the last fine turning] The finish is good.
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Anonymous users2024-02-01Generally speaking: the machining of slender shafts is prone to the saddle error you described.
Reason: The steady rest and the following tool holder are not used in the machining process, which leads to the increase of radial force and the machining of the optical axis during the turning process.
Radial displacement occurs gradually, resulting in smaller machining of the middle dimension.
Second, the turning depth in the three elements of cutting is too large, which increases the radial force of the turning and causes the radial displacement of the machining optical axis.
Third, in the process of card loading, the clamping force of the jaw end and the tailstock end is too large, resulting in stress concentration.
The parts are deformed after the machining is heated.
Fourth, the processing material is more sticky to the knife, at the tip of the tool.
Built-up edge gradually forms.
Hope mine is helpful to you.
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Anonymous users2024-01-31I've answered this question many times:
There are two reasons for the ellipse, one is the runout caused by the clearance of the spindle bearing, and the other is the error of the tool movement.
Let me explain the principle of motion, under normal circumstances, the workpiece is tightened, the spindle does not run, the workpiece does a circular motion around the turning center, and the tool movement is also normal, the outer circle of the car must be circular, that is, from the center of the spindle to the turning surface of the workpiece, it is a circular motion, at this time, as long as the tool is stable, it must be circular, and the generation of the ellipse shows that the workpiece is doing the regular beating in the X direction, and at this time, the surface of the workpiece is uneven, and there are many on one side. The side with less and more forms the short diameter of the ellipse, and the less side forms the long neck of the ellipse. The workpiece itself is tightened by the spindle, and the workpiece itself will not move, whether the spindle runout with the workpiece beats, or the tool is unstable, in these two cases. The instability of the tool may be that the clamp is not tight, or the X screw has a gap, and the screw gap drives the tool, but this situation is unlikely to produce an ellipse, because the ellipse is also caused by regular beating, and the screw gap is unstable, and the change in the size of the outer circle is unstable, therefore, there is only one real ellipse, that is, the radial runout of the spindle is caused.
The runout of the spindle is because the ball of the spindle bearing is damaged, the damaged ball is in the fixed position of the bearing, the cutter eats the workpiece, squeezes the spindle, and the spindle moves to the bad ball when it loosens, and the car is less to form the long side of the ellipse, and when the spindle moves to a good ball, the workpiece does not move, and the car is relatively more, and the ellipse is formed over and over again. Your knife amount is greater than two millimeters to have an ellipse, indicating that the ball damage of the spindle bearing is light, but it only reacts when the effort is too large, and the solution is very simple, that is, to replace the damaged spindle bearing. Hope it helps.
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Anonymous users2024-01-30It should be that the chuck is not centered, and the claw is wrong.
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Anonymous users2024-01-29Reasons for the appearance of an elliptical workpiece in lathe processing + countermeasures:
1.There is a gap ...... the spindleAdjust the spindle clearance and replace the spindle bearing if necessary;
2.Improper way of clamping the workpiece, such as the workpiece sticking out too long......change the clamping method;
3.The workpiece is relatively ...... rigidchange the clamping method;
4.The rigidity of the tool is too poor or the clamping tool has false ......Replacement of qualified tools or correct clamping of tools;
5.The rigidity of the machine itself ...... poorReplace the machining with a rigid machine.
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Anonymous users2024-01-28In this case, it is mainly caused by the axis of the tailstock of the lathe deviating from the axis of rotation of the main shaft, which can be solved by adjusting the offset of the tailstock of the cluster dressing joint.
The adjustment of the tailstock offset can be carried out by adjusting the two adjusting screws, and the magnetic dial gauge is also required to assist in the adjustment process (the magnetic gauge base is sucked on the lathe guide rail, and the dial gauge is hit on the side of the tailstock).
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Anonymous users2024-01-27Summary. When turning the workpiece, the roundness does not meet the requirements, and what are the reasons for it from the machine tool.
When turning the workpiece, the roundness does not meet the requirements, and what are the reasons for it from the machine tool.
When turning the workpiece, the roundness does not meet the requirements, and what are the reasons for it from the machine tool.
Based on what you have learned, please talk about how to unremittingly promote the construction of 'intrinsic safety'.
1. The gap between the front and rear bearings of the spindle is too large, and the roundness of the 2.
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Anonymous users2024-01-26Summary. When the tool tip and the axis of the workpiece are not on a horizontal plane for turning the outer circle, it will have an impact on the machining size, which is manifested in the following two situations: 1
Depth of Cut Variation: When the tip of the tool deviates from the axis, the effective depth of cut of the tool will change. If the tool tip is below the axis of the workpiece, the tool will cut the lower part more than the design size, resulting in a smaller machining size.
When the tool tip deviates from the axis, the magnitude and direction of the cutting force will change due to the different frictional moments of the tool. This affects the shape and surface quality of the part and causes vibration and noise during machining. Therefore, when turning the outer circle, the cutting edge should be kept as level as possible with the axis of the workpiece, which can be achieved by adjusting the height of the machine or by using turning compensation.
Before turning, it is also necessary to check the mounting accuracy of the workpiece and the tool to avoid deviations caused by errors.
When turning the outer circle, if the tool tip is not on the same horizontal plane as the axis of the workpiece, how will the machining size be affected?
When the tip of the tool and the axis of the workpiece are not on a horizontal plane for turning the outer cover Huiyuan, it will have an impact on the processing size, which is manifested in the following two situations: 1Depth of Cut Variation:
When the tip of the tool deviates from the axis, the effective depth of cut of the tool will change. If the tool tip is below the axis of the workpiece, the tool will cut the lower part more than the design size, resulting in a smaller machining size. Conversely, if the tip is above the axis of the workpiece, the tool will cut the upper part more than the design size, resulting in a larger machining size.
2.Cutting force change: When the cutting edge deviates from the axis, the magnitude and direction of the cutting force will change due to the difference in the friction resistance torque of the tool.
This affects the shape and surface quality of the part and causes vibration and muffled noise during machining. Therefore, when turning the outer circle, the cutting edge should be kept as level as possible with the axis of the workpiece, which can be achieved by adjusting the height of the machine or by using turning compensation. Before turning, it is also necessary to check the mounting accuracy of the workpiece and the tool to avoid deviations caused by errors.
When the outer circle is cut by the car min, the tip of the knife is not on the same horizontal plane as the axis of the workpiece, and the bridge may be installed high, or it may be installed too low, and the diameter of the workpiece is too large or small.
Dear, the diameter of the processed workpiece is small.
1. Analyze the drawings and process treatment of parts.
According to the drawing, the geometric shape and size of the part, the technical requirements are analyzed, the content and requirements of the processing are clarified, the processing scheme is determined, the processing sequence is determined, the fixture is designed, the tool is selected, the reasonable tooling route is determined and the reasonable cutting amount is selected. >>>More
The machining center has more Y-axes than CNC lathes, and CNC lathes only have X, Z axes.
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Although he is now a fat man, but in terms of personal experience, fitness is OK, it is not recommended to bodybuilding (excessive muscle training), college has been going to the gym, the dormitory is all kinds of dumbbells, a few years down the body should have, a slight inverted triangle, but really can't practice super big, on the contrary, the seniors who work out together are full of muscles and arms are about the same as my calves, the training intensity is not as high as mine, the time is not as long as me, that is called a man! The reason is just a matter of diet, people eat protein powder as rice, basically a little exercise to urge out the muscles, the strength is there, the patience depends on which aspect, the endurance of orienteering is strong, and the wrist and equipment can be seen in the short distance to move things, but the long-distance running and climbing up and down the stairs and other high aerobic exercise bullshit is not, every time we organize and train 5-10 kilometers of aerobic exercise first to finish is him, halfway through the need to replenish electrolytes, otherwise it will not be able to persist at all, and the exercise method has nothing to do with it, sprinting and sprinting is not good, There is no strain explosiveness, because the muscles do not have a particularly good function of storing energy (oxygen tolerance and metabolism are not good, long-lasting exercise energy is stored in fat, there is fat around the normal tissues and internal organs of human beings and many fascia, and there is also protective fat under the skin, and the muscles themselves do not store too much energy, which is equivalent to the engine for the car, but the fuel consumption is high, and there is no large fuel tank), don't tell me about aerobic fitness, there is no aerobic if you train muscles and eat protein powder, If you don't want to participate in bodybuilding competitions or fanatics, it is not recommended to eat protein powder for training, you can exercise normally, the muscles will be there, and it looks natural, the main thing is that even if you don't work out one day, you won't become the kind of fat man in the shape of a gourd who can't lose weight, don't believe it? Look at the police in the United States and which old fitness gurus, believe it or not? >>>More