What is the function of stud bolt? Why do you choose stud bolt?

Stud bolt, also known as a double-headed screw or Stud bolt.A fixed link function used to connect machinery. Studs are threaded at both ends and the middle screw, either thick or thin.It is generally used in mining machinery, Bridges, automobiles, motorcycles, boiler steel structure, pylon, long-span steel structure and large buildings.

1.Brief?introduction

A bolt is a screw with a larger diameter or without a head, such as a stud.Generally, they are not called "studs" but "studs".The most common form of a double-ended stud is threaded at both ends with a smooth rod in the middle.

Most typical use: anchor bolt, or similar to anchor bolt, thick connection, ordinary bolt can not achieve the time.

2.Specifications

Double head bolts of equal length, thread size D =M12, nominal length L=80mm, performance class 4.8, complete marked GB 901 M12×80

3.Main?Application

1).used in the main body of large equipment, the need to install accessories, such as the mirror, mechanical seal seat, reducer frame, etc.At this time, the use of studs, one end of the screw into the main body, after the installation of the other end of the nut, because the accessories are often disassembled, the thread will wear or damage, the use of studs replacement will be very convenient.

2). When the thickness of the connecting body is very large and the bolt length is very long, the stud will be used.

3).used to connect thick plates and inconvenient to use hexagonal bolt connection, such as concrete roof truss, roof beam suspension monorail beam suspension parts, etc.

4.Locking purposes

In actual work, vibration, change of external load, material high temperature creep and so on will cause the reduction of friction force, the positive pressure in the thread pair disappears in a moment, the friction force is zero, thus making the thread connection loose, such as repeated action, the thread connection will relax and fail.Therefore, it is necessary to prevent loose, otherwise it will affect the normal work and cause accidents.

5.surface?treatment

Generally, stud bolts need to undergo surface treatment. There are many types of bolt surface treatment. Generally, electroplating, blackening, oxidation, phosphating, non-electrolytic zinc coating treatment are commonly used.However, electroplated fasteners occupy a large proportion in the actual use of fasteners.Especially in automobiles, tractors, home appliances, instruments and meters, aerospace, communications and other industries and fields are more widely used.

However, for threaded fasteners, the use of not only requires a certain anti-corrosion ability, but also must ensure the thread interchangeability, here can also be called the screw.In order to meet the dual performance of "anti-corrosion" and "interchange" of threaded fasteners in use, it is necessary to formulate special electroplating standards.

6.Basic knowledge and maintenance

The production of stud bolts needs fixed equipment and machine processing, of course, in fact, the processing procedure is relatively simple, there are mainly the following procedures:

First is the need to pull out, pull material is to use pull machine will distort the material pull straight, after this process to the next working procedure, the procedure is to use cutting machine will pull straight long material according to customer's requirements into the length of the customer needs, this completes the procedure, the third procedure is cut short expected in a thread rolling machine to roll out of thread;

Here the ordinary stud is finished, of course, if you need other requirements, there will be other procedures.

Generally known bolt refers to a screw with a larger diameter. According to this view, the diameter of the screw is much smaller than that of the bolt.

Studs have no heads and are sometimes called double studs.

Both ends of the stud are threaded, with no thread in the middle and a light rod in the middle.

Studs are used on large equipment such as reducer racks.

In practical use, the external load will have vibration and the influence of air temperature will appear smaller friction, and over time, the threaded connection will relax and fail.

So in peacetime need to do a good job of stud maintenance work.

The stud or anchor bolt will have problems under the action of mechanical friction for a long time. When there is a problem, it is necessary to remove the engine oil pan, carefully check the use of the engine bearing bush, check whether the clearance between the bearing bush is too large, and replace it in time if the clearance is too large.

Replace the connecting rod bolts as well as the studs.Some large equipment such as nail machine in normal operation, if found that the engine is not very stable or abnormal sound, also want to stop in time to check, so as to avoid greater problems.

At the time of each maintenance, the new replacement of stud and new replacement of other accessories for inspection, inspection of the focus on the stud head and guide part, but also strictly check the thread of each part whether there are cracks or dents, but also to see the shape of the stud teeth, whether there is a change.

Check whether the pitch is abnormal. If it is abnormal, it should not be used again.The torsion wrench tool should be used when installing the connecting rod cover.Must be tightened in accordance with the specified standards, the torque should not be too large or too small, but also pay attention to the selection of supporting manufacturers of studs and studs.