Questions about precision mechanical parts processing

Precision mechanical parts processing is the most commonly used measure and means in the industrial stage. For this technology, the first thing to consider is the quality and structure of the parts themselves. If inferior parts are selected, no matter what method is used for processing, it will be useless. Therefore, the quality of parts in part processing is a very important step. When it comes to parts, it is one of the essential products among many mechanical devices. Parts are the basic elements of machine composition. Machines generally include one or several transmission parts (such as electric motors, internal combustion engines, and steam engines) used to receive external energy.

Implement the execution part of the machine production function (such as the tool in the machine tool), transmit the movement and power of the prime mover to the transmission part of the execution part (such as the gears and spiral transmission mechanism in the machine tool), and ensure the inspection of coordinated work of various parts in the machine It is composed of a control system (such as a CNC system in a machine tool) (that is, the machine consists of a prime mover, a transmission part, an execution part, and a measurement and control part). By further decomposing the machine, you can obtain various parts.

Parts are the basic elements that make up machines and can be roughly divided into two categories: one is the parts that can be used in various machines (such as gears, shafts, etc.), called general parts; the other is the one in a certain category. Parts (such as bolts, propellers, etc.) that are used in machines of the type of machine are called special parts; in addition, some parts combinations composed of parts that work together are called components or components (such as couplings, reducers wait). So what questions should be paid attention to when processing precision mechanical parts?

There are many ways to Parts refer to individual parts that cannot be separated in machinery. They are the basic components of machines and the basic unit in the mechanical manufacturing process. The manufacturing process generally does not require assembly processes. Such as shaft sleeves, bearing shells, nuts, crankshafts, blades, gears, cams, connecting rod bodies, connecting rod heads, etc.process precision mechanical parts , such as heat treatment.

When CNC machine tools are mass-processing precision mechanical parts, they should pay special attention to the accuracy of processing. So what issues should be paid attention to when processing precision mechanical parts?

1. The machining accuracy of batch parts is generally due to the fact that the feed dynamics between each shaft are not adjusted according to the error during installation and adjustment, or the transmission chains of each shaft of the machine tool change after use. It can be resolved by readjustment and modification of the gap compensation amount. When the dynamic tracking error is too large and the alarm is called, check whether the servo motor speed is too high. Whether the position detection element is good. The position feedback cable connector is in good contact. Whether the corresponding analog output latch and gain potentiometer are good. Is the corresponding servo drive device normal?

2. Overshoot during machine tool movement causes poor machining accuracy, which may be because the acceleration and deceleration time is too short, so the speed change time can be appropriately extended. It may also be that the connection between the servo motor and the lead screw is loose or the rigidity is too poor, which can appropriately reduce the gain of the position ring.

3. Extremely different roundness when the two axes are linked

Axial deformation of the circle: This deformation may be caused by mechanical failure. Poor axis positioning accuracy or improper screw gap compensation will lead to roundness errors when passing the quadrant.

Oblique ellipse error: At this time, the position deviation value of each axes should be checked first. If the deviation is too large, the position loop gain can be adjusted to eliminate it. Then check whether the interface board of the rotary transformer or induction synchronizer is adjusted properly, and then check whether the gap between the mechanical transmission pair is too large and whether the gap compensation is appropriate.

After reading the above, everyone has now understood the questions about the processing of precision mechanical parts. They have already explained it to you in the above. If you don’t understand, come and take a look at the above.