Welcome to visit the official website of Cixi Hongguang Machinery Co., Ltd.!

Telephone:0086-574-6347 1043

Red light always implements“Customer focus
Achieving the concept of "Integrity, Cooperation"
  • direct deal

    direct deal

  • Quality assurance

    Quality assurance

  • Customer service without worry

    Customer service without worry

  • Support customization

    Support customization

  • Years of experience

    Years of experience

Round head needle roller
Your current location : Home >> News >> Company news

Quality control of needle rolling manufacturer

2020-02-18 16:47:51
Times

The roller bearing belongs to the turning body, which is the key component of the rolling bearing as well as the bearing steel ball, and is the turning body with more functions of the planetary gear shaft. The quality of roller bearing immediately endangers the quality of roller bearing.

Technical standard for tapered roller bearings

The larger the tapered roller bearing is called the datum plane. There are cone datum, plane datum and spherical datum, and the cone angle φ is 1 ° - 4 ° 20 ', because the working characteristics of the spherical datum are good, the lower side only discusses the spherical datum.

The specification of roller bearing requires the definition of various dimensional tolerances of roller bearing and the tolerance value of actual production and manufacturing. The definition of various dimensional tolerances is as follows:

Roundness deviation: the axial distance between the circumscribed circle of the line (outer) surface and the random points on the network.

Single plan diameter variation vdwp: arithmetic mean value of roller bearing and small single diameter in single axial plan.

Cylindricity of standard inner hole: the distance between the standard inner hole of the cone and the fillet specification of the roller bearing is 1.2 times, and the center point is on the circle on the pivot net of the roller bearing, and the distance between each point on the circle and the distance between the axial plan and the small diameter direction.

Cone angle error Δ 2 φ: in any radial plan of roller bearing, the difference between the intersection angle of two prime lines on the cone surface of roller bearing and the nominal pressure cone angle of roller bearing.

Vdwl: in the same vdwl, the difference between the average diameter of a single plan and the average diameter of a small plan.

Change of cone angle of gauge value batch V2 φ L: in the same gauge value batch, the difference of cone angle between roller bearing with cone angle and roller bearing with small cone body angle.

Special pin processing and production process

The whole process of special-shaped pin features varies with the accuracy, specification, size, mass production and processing mode of roller bearing, but the whole process of basic production and manufacturing is basically the same. The whole process of symbolic production and manufacturing of class III tapered roller bearing is: feeding (straightening, filleting) - stamping die forming - removing the ring belt - selecting the material Head - soft grinding diameter - soft grinding inner hole - quenching and tempering treatment - channeling air oxide skin - fine grinding diameter - channeling soft point - soft point inspection - heat cleaning and rust prevention treatment - grinding inner hole - heat cleaning and rust prevention treatment - according to m diameter - final grinding diameter - ultra fine diameter - heat cleaning, dry cleaning - final inspection and selection - oil coating and packaging. In order to analyze conveniently, the whole process of production and manufacturing can be divided into six sections: rough embryo production and processing - soft grinding before conditioning treatment - conditioning treatment - hard grinding after conditioning treatment - deep processing - quality detection and sorting.

Analysis of key production and processing of tapered roller bearing

Production and processing of hairy embryo

There are cold heading, hot heading and milling methods for the production and processing of rough embryo, among which the cold heading is of high efficiency and the roller bearing is of good quality in nature. For roller bearings with diameter more than 30mm, the centralized process method is usually used on the double axis or multi axis automatic lathe or the decentralized process method is used on the numerical control lathe. For large and medium roller bearing rough embryo, the hot forging method is used.

滚针厂家的质量控制

label

滚针厂家

contact us

Cixi Hongguang Machinery Co., Ltd.

add1.png  Add:No.718, Weisan Road, industrial park, Andong Town, Hangzhou Bay New Area, Ningbo

add2.png  Tel:0086-574-6347 1043

add3.png  E-mail:hgjx@cxhgjx.com

NAVIGATION

Home          About

Products     Case

News           Inquiry

Contact

SERVICE

0086-574-6347 1043

Telephone