The manufacturing process of spherical roller bearings is closely related to the use, quality, performance and service life of spherical roller bearings. If there is any accident in the manufacturing process of spherical roller bearings, the final manufactured Spherical roller bearings cannot be used normally, and the latter will be eliminated directly. Therefore, we must pay attention to the production process of spherical roller bearings. This is very important. According to experience, I will tell you about the production process of spherical roller bearings. important part of the.
What are the important links in the production process of spherical roller bearings?
Important links in the production process of spherical roller bearings must be paid attention to, so as not to cause unnecessary damage to spherical roller bearings:
1. Forging link
The forging link is an important link to ensure the reliability and life of the spherical roller bearing. After the raw materials are forged, the blank of the spherical roller bearing ring is formed. At the same time, the organizational structure of raw materials becomes more dense and streamlined, which can improve the reliability and service life of spherical roller bearings. In addition, the quality of the forging process will directly affect the utilization rate of raw materials, thereby affecting the production cost.
2. Heat treatment
The heat treatment link is to carry out high temperature treatment on the forged and turned spherical roller bearing ring, which directly affects the uniformity of carburization in the spherical roller bearing ring and can improve the wear resistance of the spherical roller bearing And hardness are also important links that affect the reliability and life of spherical roller bearings.
3. Grinding process
The heat-treated spherical roller bearing ring still needs to be ground, which is an important link to ensure the accuracy of the spherical roller bearing. After grinding, the production process of the spherical roller bearing ring is basically completed.
The technological process of inner and outer rings of spherical roller bearings: bar material—forging—turning—heat treatment—grinding—superfinishing—final inspection of parts—rust prevention and storage.
Detailed explanation of friction steps for superfinishing of bearings
Spherical roller bearings are classified according to the ISO classification standard: P0, P6, P5, P4, P2. The grades increase in turn, among which P0 is ordinary precision, and other grades are precision grades. Of course, different classification standards and different types of bearings have different classification methods, but the meaning is the same.
The accuracy of spherical roller bearings is divided into (main) dimensional accuracy and rotational accuracy. The accuracy grades have been standardized and are divided into six grades: 0 grade, 6X grade, 6 grade, 5 grade, 4 grade and 2 grade.
Of course, in addition to the above two types of bearings, other types of bearings, including spherical roller bearings, cylindrical roller bearings, etc., are also classified by precision. After all, bearings are widely used, but each application The precision requirements for bearings in the field are quite high, so that they can effectively meet the use and achieve a certain use effect. Then, in terms of the machining accuracy of the bearings, there is also a corresponding order for the friction design and method of precision machining. Generally, Next, the superfinishing sequence of bearings can generally be divided into three steps: cutting, semi-cutting, and smooth finishing.
Today, the editor will give you a detailed explanation of the steps and skills about the superfinishing friction of spherical roller bearings.
1. Cutting
When the grinding stone surface is in contact with the convex peak on the surface of the rough raceway, due to the small contact area, the force per unit area is relatively large. Part of the abrasive grains on the surface of the whetstone fell off and chipped, exposing some new sharp abrasive grains and edge. At the same time, the surface peaks of the bearing workpiece are subjected to rapid cutting, and the convex peaks and the grinding metamorphic layer on the surface of the bearing workpiece are removed through the action of cutting and reverse cutting. This stage is known as the stock removal stage, where most of the metal allowance is removed.
2. Half cutting
As the processing continues, the surface of the bearing workpiece is gradually smoothed. At this time, the contact area between the grinding stone and the workpiece surface increases, the pressure per unit area decreases, the cutting depth decreases, and the cutting ability weakens. At the same time, the pores on the surface of the grindstone are blocked, and the grindstone is in a half-cut state. This stage is called the semi-cutting stage of bearing finishing. In the semi-cutting stage, the cutting marks on the surface of the bearing workpiece become shallower and appear darker.
3. Finishing stage
This is the final step in the superfinishing of bearings. As the surface of the workpiece is gradually ground, the contact area between the grinding stone and the workpiece surface further increases, and the surface of the grinding stone and the bearing workpiece is gradually separated by the lubricating oil film, the pressure on the unit area is very small, the cutting effect is reduced, and finally Stop cutting. We call this stage the lightening stage. In the finishing stage, there are no cutting marks on the surface of the workpiece, and the bearing shows a bright finished luster.
The role of the bearing fit is to make the stationary ring and the rotating ring of the bearing solidify with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the installation part, so as to realize the transmission of load and limit the movement in the rotating state The basic task of the position of the system relative to the stationary system.
The above is a basic step of superfinishing of bearings. Every step is essential. Only in this way can we produce bearings that meet the needs and meet the application standards. , thus exerting one’s own value.
HZK BEARING FACTORY with 27 years,welcome your inquiry!
Post time: Apr-21-2023