CN113001123B

CN113001123B - Manufacturing method of auger shaft based on combination of hollow shaft and solid shaft

Info

Publication number: CN113001123B
Application number: CN202110283313.2A
Authority: CN
Inventors: 崔春艳; 张颖; 李凯
Original assignee: Zhongye Heavy Industry Tangshan Co ltd
Current assignee: Zhongye Heavy Industry Tangshan Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2022-06-07
Anticipated expiration: 2041-03-17
Also published as: CN113001123A

Abstract

The invention relates to the equipment field of screw feeders, and discloses a manufacturing method of a packing auger shaft based on the combination of a hollow shaft and a solid shaft, which comprises the steps of welding the hollow shaft and a screw blade by a small current of 85A-100A, keeping the temperature of the hollow shaft at 150 +/-10 ℃ all the time, placing the hollow shaft on a boring machine for processing, wherein the concentricity of the inner diameter of the hollow shaft is less than or equal to 0.5 mm; the method also comprises the steps of manufacturing a solid shaft, performing rough turning and finish turning, performing finish turning on the outer rings of the solid shaft and the support ring, assembling the solid shaft and the hollow shaft to form a packing auger shaft, and welding by using low current of 85A-100A in the whole welding process to keep the temperature of the steel pipe at 150 +/-10 ℃. The auger shaft manufactured by the manufacturing method is arranged in the screw feeder, the screw feeder operates stably, the service life of the screw feeder is prolonged by at least two years, and the production efficiency and the benefit are obviously improved.

Description

Manufacturing method of auger shaft based on combination of hollow shaft and solid shaft

Technical Field

The invention relates to the field of equipment of a screw feeder, in particular to a manufacturing method of a packing auger shaft based on combination of a hollow shaft and a solid shaft.

Background

At present, screw feeders are widely used in feeding systems in coal mines and metallurgical industries. During the material conveying process of the screw feeder, the material is hard, the working condition environment temperature is high, the loading amount is large, the phenomenon of serious material blocking or material blocking often occurs, the phenomenon can cause the device main body to be burnt out due to empty load, the operation of a production line is influenced, and the loss amount can reach thousands of yuan.

The core component of the screw feeder is a packing auger shaft positioned in a stranding cage shell, the length of the packing auger shaft is generally more than 3.5 meters, the structure is complex, the welding quantity is large, and the blocking or blocking condition can be aggravated under the condition that the concentricity, the runout quantity of the blades and the stability are insufficient.

Therefore, it is necessary to manufacture a packing auger shaft suitable for the above severe environment, which has good concentricity, small blade runout, high smoothness and high temperature resistance, and comprises a solid shaft and a hollow shaft, wherein the helical blade is welded on the outer side of the hollow shaft, a cooling system is arranged in the hollow shaft, and the solid shaft is used for providing rotary power for the hollow shaft. In order to realize the smooth work of the screw feeder under the above conditions, prevent the equipment from being burnt due to no load and prolong the service life of the screw feeder, a better manufacturing method is urgently needed.

Disclosure of Invention

The invention aims to provide a manufacturing method of an auger shaft based on combination of a hollow shaft and a solid shaft.

The invention is realized by the following technical scheme:

the manufacturing method of the auger shaft based on the combination of the hollow shaft and the solid shaft comprises the following steps:

a. selecting a thick leather hose, and reserving a machine allowance for the thickness and the diameter of the thick leather hose;

b. verifying the required straightness range of the thick leather pipe, ensuring that the straightness of the processed steel pipe body is less than 0.5mm/m, selecting the thick leather pipe with qualified straightness in the straightness range, and machining the thick leather pipe into the steel pipe body, wherein otherwise, the thick leather pipe needs straightening pretreatment;

c. placing the steel pipe body on a platform, drawing the installation position of a helical blade on the outer wall of the steel pipe body, welding the helical blade on the steel pipe body through an argon arc welding spot, and welding by using a small current of 85A-100A to keep the temperature of the steel pipe body at 150 +/-10 ℃;

d. welding wear-resistant layers on the helical blades and the steel pipe body;

e. all the spiral blades rotate around the steel pipe body for a circle, the straightness of the steel pipe body is detected, if the straightness is less than or equal to 1mm/m, the next step is carried out, otherwise, the steel pipe body needs to be straightened, and the straightened thick leather pipe is machined into a hollow shaft;

f. placing the hollow shaft on a boring lathe, and machining the inner diameter of the hollow shaft to ensure that the size of the inner diameter meets the requirement of a drawing and the concentricity of the inner diameter is less than or equal to 0.5 mm;

further comprising the steps of making the solid shaft:

g. roughly turning the solid shaft, and reserving a finish turning allowance of 5 mm;

h. quenching and tempering are carried out on the solid shaft, so that the hardness of the solid shaft meets the requirement of equipment;

i. welding a cooling pipe used for cooling the shaft temperature in the inner cavity of the hollow shaft and the solid shaft, and welding a support ring used for supporting the hollow shaft on the cooling pipe;

j. finish turning is carried out on the outer rings of the solid shaft and the support ring, so that the concentricity of the outer diameters of the solid shaft and the support ring is smaller than 0.5mm, and the tolerance fit between the outer diameter of the support ring and the inner diameter of the hollow shaft is transition fit;

in addition, still including the equipment the solid axle becomes with the hollow shaft auger shaft's step:

k. a guide shaft used as a through shaft is welded at the tail part of the cooling pipe;

fixing the hollow shaft on a platform, and penetrating the guide shaft into an inner cavity of the hollow shaft by using a crown block;

and m, hammering one end of the solid shaft, which is far away from the hollow shaft, so that the solid shaft is slowly inserted into the inner cavity of the hollow shaft until the solid shaft is completely inserted into the inner cavity of the hollow shaft.

And n, welding the interface of the solid shaft and the hollow shaft, and welding by using a small current of 85-100A to keep the temperature of the hollow shaft at 150 +/-10 ℃ all the time.

The preferable technical scheme also comprises the following steps: the helical blades are symmetrically welded on the hollow shaft in sections.

In the step d, the wear-resistant layer is welded by argon arc welding, and the wear-resistant layer is symmetrically welded in a segmented mode at a low current.

The beneficial effects are that: compared with the prior art, the auger shaft manufactured by the manufacturing method is arranged in the screw feeder, the screw feeder runs stably, the phenomenon of material blockage or material blockage of the screw feeder is obviously reduced, the device is prevented from being burnt out due to no load, the service life of the screw feeder is prolonged by at least two years, the investment fund of enterprises is saved, and the production efficiency and the benefit are obviously improved.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic illustration of a manufacturing step of using a crown block to insert the guide shaft into the inner cavity of the hollow shaft according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the completion of the installation of an embodiment of the screw feeder of the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a block diagram of an embodiment of a weld wear layer on the spiral blades of an embodiment of the screw feeder of the present invention;

FIG. 5 is a wear resistant layer on the outer surface of the hollow shaft of the embodiment of the screw feeder of the invention;

wherein the reference numbers are:

1. a steel pipe body; 11. a support ring; 12. a cooling tube; 13. a helical blade; 2. a solid shaft; 3. and a wear-resistant layer.

Detailed Description

As shown in fig. 1 to 5, the hollow shaft includes a steel pipe body 1, a support ring 11, a cooling pipe 12 and a helical blade 13, and the manufacturing method includes the steps of manufacturing the hollow shaft:

b. verifying the required straightness range of the thick leather pipe, ensuring that the straightness of the processed steel pipe body 1 is less than 0.5mm/m, selecting the thick leather pipe with qualified straightness in the straightness range, and machining the thick leather pipe into the steel pipe body 1, otherwise, requiring straightening pretreatment on the thick leather pipe, and machining the straightened thick leather pipe into the steel pipe body 1;

c. the method comprises the following steps of placing a steel pipe body 1 on a platform, drawing the installation position of a helical blade 13 on the outer wall of the steel pipe body 1, welding the helical blade 13 on the steel pipe body 1 through an argon arc welding spot, welding by using a small current of 85A-100A, keeping the temperature of the steel pipe body 1 at 150 +/-10 ℃ all the time, strictly controlling heat input quantity, preventing the hollow shaft from deforming due to overheating, and properly selecting the values of the small current from 85A, 86A, 87A, 88A, 89A, 90A, 95A and 100A according to the diameter of the shaft;

d. welding a wear-resistant layer 3 (namely a tungsten carbide layer) on the helical blade 13 and the steel pipe body 1, wherein the height of a welding seam adopted on the steel pipe body 1 is 2.0mm, 20 tungsten carbides are uniformly distributed on the circumference, argon arc welding, low-current and sectional symmetrical welding are also adopted for welding the wear-resistant layer 3, the temperature of the hollow shaft is strictly controlled, and the hollow shaft is prevented from being deformed due to overheating;

e. all the helical blades rotate around the steel pipe body 1 for one circle, the straightness of the steel pipe body 1 is detected, if the straightness is less than or equal to 1mm/m, the next step is carried out, and otherwise, the steel pipe body 1 needs straightening pretreatment;

further comprising the steps of manufacturing the solid shaft 2:

g. roughly turning the solid shaft 2, and reserving a finish turning allowance of 5 mm;

h. quenching and tempering are carried out on the solid shaft 2, so that the hardness of the solid shaft can meet the requirement of equipment;

i. welding a cooling pipe 12 for cooling the shaft temperature in the inner cavity of the hollow shaft and the solid shaft 2, and welding a support ring 11 for supporting the hollow shaft on the cooling pipe 12;

j. finish turning is carried out on the outer rings of the solid shaft 2 and the support ring 11, so that the outer diameter concentricity of the solid shaft 2 and the support ring 11 is less than 0.5mm, and the tolerance fit between the outer diameter of the support ring 11 and the inner diameter of the hollow shaft is transition fit;

in addition, the method also comprises the step of assembling the solid shaft 2 and the hollow shaft into the packing auger shaft:

k. a guide shaft used as a through shaft is welded at the tail part of the cooling pipe 12, and the guide shaft is a steel pipe;

and m, hammering one end of the solid shaft 2, which is far away from the hollow shaft, so that the solid shaft 2 is slowly inserted into the inner cavity of the hollow shaft until the solid shaft 2 is completely inserted into the inner cavity of the hollow shaft.

And n, welding the interface of the solid shaft 2 and the hollow shaft, and welding by using a small current of 85A-100A, so that the temperature of the hollow shaft is always kept at 150 +/-10 ℃, and the small current is 85A, 86A, 87A, 88A, 89A, 90A, 95A, 100A and the like according to the diameter of the shaft.

So far, the whole auger shaft is manufactured.

The auger shaft manufactured by the manufacturing method is arranged in the screw feeder, the screw feeder operates stably, the phenomenon of material blockage or material blockage of the screw feeder is obviously reduced, the device is prevented from being burnt out due to no load, the service life of the screw feeder is prolonged by at least two years, the investment fund of an enterprise is saved, and the production efficiency and the benefit are obviously improved.

The method is different from the method in that the method further comprises the following steps: the helical blades 13 are symmetrically welded to the hollow shaft in sections.

The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims

1. The manufacturing method of the auger shaft based on the combination of the hollow shaft and the solid shaft is characterized in that the manufacturing method comprises the following steps of:

b. verifying the required straightness range of the thick-skin pipe, ensuring that the straightness of the processed steel pipe body is less than 0.5mm/m, selecting the thick-skin pipe with qualified straightness according to the straightness range, and machining the thick-skin pipe into the steel pipe body, otherwise, carrying out straightening pretreatment on the thick-skin pipe;

d. welding wear-resistant layers on the helical blades and the steel pipe body;

e. all the spiral blades rotate around the steel pipe body for one circle, the straightness of the steel pipe body is detected, if the straightness is less than or equal to 1mm/m, the next step is carried out, and otherwise, the steel pipe body needs to be straightened;

further comprising the steps of making the solid shaft:

in addition, still include the equipment the solid axle becomes with the hollow shaft auger shaft's step:

m, hammering one end of the solid shaft, which is far away from the hollow shaft, so that the solid shaft is slowly inserted into the inner cavity of the hollow shaft until the solid shaft is completely inserted into the inner cavity of the hollow shaft;

n, welding an interface of the solid shaft and the hollow shaft, and welding by using a small current of 85-100A to keep the temperature of the hollow shaft at 150 +/-10 ℃ all the time;

further comprising the steps of: the helical blades are symmetrically welded on the hollow shaft in sections;

in the step d, the wear-resistant layer is welded by argon arc welding, and the wear-resistant layer is welded symmetrically in a segmented mode with low current.