CN111673395A

CN111673395A - Production process of dovetail connecting sleeve of tower crane

Info

Publication number: CN111673395A
Application number: CN202010640921.XA
Authority: CN
Inventors: 聂立平; 聂静
Original assignee: Xintai Runze Metal Product Co ltd
Current assignee: Xintai Runze Metal Product Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-09-18

Abstract

The invention relates to a production process of a dovetail connecting sleeve of a tower crane, which adopts a steel material Q235 or Q345, blanking square billets, rolling the blanking square billets into section steel through heating and steel rolling equipment and processes respectively, and machining the section steel. The product produced by the invention has the advantages of low price of the adopted raw materials, corresponding reduction of rolling cost and machining cost, high yield, cost and labor saving and improvement of the production efficiency of enterprises under the condition of unchanged quality.

Description

Production process of dovetail connecting sleeve of tower crane

Technical Field

The invention relates to the technical field of tower cranes, in particular to a production process of a dovetail connecting sleeve of a tower crane.

Background

In the production process of the dovetail connecting sleeve of the traditional tower crane, round steel with the diameter of 80-100 mm is mainly used for blanking, the blanking weight is not higher than 10 kg, and the cost is high; after heating, forging and forging a die forging formed blank by using an air hammer, wherein the forging and die forging cost of the round steel material is high, the production yield of one round steel material is low, and the manual labor is large; and machining the blank after forming, wherein the machining process comprises the following steps: milling three end faces, drilling holes, performing shot blasting, and warehousing finished products, wherein machining operation is complicated and cost is high. The whole production process has high cost and low efficiency, and the production of enterprises is influenced.

Disclosure of Invention

In order to solve the technical problem, the invention provides a production process of a dovetail connecting sleeve of a tower crane, which adopts the technical scheme that:

the method comprises the following steps:

step one, preparing blanking:

using a steel material Q235 or Q345 as a raw material, and blanking 120-300 square billets, wherein the blanking length is 2-3 m, and the weight is 350-1000 kg;

step two, heating:

putting the material obtained in the step into a kiln or an electric furnace for heating at 1100-1200 ℃ for 2-3 hours;

step three, rolling and forming:

rolling the material heated in the step two into section steel by using steel rolling equipment and a process;

step four, machining:

sawing the rolled section steel in the third step into a plurality of sections with the same size by using a band saw;

respectively sawing off the vertical surface and the plane of each section of section steel;

thirdly, respectively performing surface treatment on each section of the sawn section steel;

fourthly, drilling the plane of each section of section steel after treatment;

and fifthly, warehousing the drilled section steel.

Further, the steel rolling equipment in the third step is 500-type steel rolling equipment.

Further, the surface treatment in the fourth step comprises shot blasting, acid pickling and grinding.

Further, a drill press was used to drill holes with a diameter of 39 mm.

The invention has the beneficial effects that: the invention relates to a production process of a dovetail connecting sleeve of a tower crane, which adopts a steel material Q235 or Q345, blanking square billets, rolling the blanking square billets into section steel through heating and steel rolling equipment and processes respectively, and machining the section steel. The product produced by the invention has the advantages of low price of the adopted raw materials, corresponding reduction of rolling cost and machining cost, high yield, cost and labor saving and improvement of the production efficiency of enterprises under the condition of unchanged quality.

Drawings

FIG. 1 is a flow chart of the present invention.

FIG. 2 is a schematic view of each section of the profiled steel structure of the present invention;

FIG. 3 is a schematic view of FIG. 2 after sawing away the plane and the vertical plane;

FIG. 4 is a schematic view of the molded structure of the present invention;

as shown, 1 facade, 2 planes, 3 holes.

Detailed Description

Example 1

The invention relates to a production process of a dovetail connecting sleeve of a tower crane, which comprises the following steps:

step one, preparing blanking:

using Q235 as a raw material, blanking 250 square billets, wherein the blanking length is 2.5m, and the weight is about 500 kg;

step two, heating:

putting the material obtained in the step into a kiln for heating at the temperature of 1100-1200 ℃ for about 2.5 hours;

step three, rolling and forming:

rolling the material heated in the step two into section steel by using steel rolling equipment and a process; the steel rolling equipment adopts 500 type steel rolling equipment.

Step four, machining:

firstly, a band saw is used for sawing the rolled section steel in the third step into a plurality of sections with the same size, as shown in fig. 2, the band saw is a schematic diagram of a section steel structure, and the length of the section steel structure is 233mm, and the width of the section steel structure is 72 mm.

② about 30mm planar sectional area is sawed off to each section of section steel respectively, the facade is about 53mm sectional area.

Thirdly, respectively performing surface treatment on each section of the sawn section steel; the surface treatment comprises shot blasting, acid pickling, polishing and pickling of residues on the surface, residual fins and residual burrs are polished during shot blasting, the defects of collision damage and oxidation pits on the surface of the section steel are polished, and the smoothness is improved.

Standing each section of section steel after treatment, vertically upwards facing the vertical surface, and drilling a hole 3 on the plane 2, as shown in figure 4; the drill hole is drilled by a drilling machine, and the diameter of the drill hole is 39 mm.

And fifthly, warehousing the drilled section steel, and finishing the treatment of the dovetail joint sleeve of the tower crane.

And finally, comparing the measured value with the set size on the drawing, and if the length and the width of the error do not exceed 1mm, determining that the product is the same as the product set by the drawing and accords with the warehousing standard. And (5) visually observing whether the surface of the product has no defect or defect and finished products meeting the warehousing standard are warehoused.

Example 2

In contrast to the embodiment 1, the process of the invention,

step one, preparing blanking:

using a steel material Q345 as a raw material, and blanking 120-300 square billets, wherein the blanking length is 2m, and the weight is about 500 kg;

the other steps were the same as in example 1.

The quality of the product obtained in the embodiment 2 is the same as that of the product produced in the embodiment 1, and the invention relates to a production process of the dovetail connecting sleeve of the tower crane, which adopts a steel material Q235 or Q345, blanking square billets, rolling the square billets into section steel through heating and rolling equipment and processes respectively, and machining the section steel. The product produced by the invention has the advantages of low price of the adopted raw materials, corresponding reduction of rolling cost and machining cost, high yield, cost and labor saving and improvement of the production efficiency of enterprises under the condition of unchanged quality.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make modifications and equivalents of the embodiments without departing from the scope of the present invention.

Claims

1. A production process of a dovetail connecting sleeve of a tower crane is characterized by comprising the following steps:

step one, preparing blanking:

step two, heating:

step three, rolling and forming:

step four, machining:

fourthly, drilling the plane of each section of section steel after treatment;

and fifthly, warehousing the drilled section steel.

2. The production process of the tower crane dovetail connecting sleeve according to claim 1, wherein the steel rolling equipment in the third step is 500-type steel rolling equipment.

3. The production process of the tower crane dovetail connecting sleeve according to claim 1, wherein the surface treatment in the fourth step comprises shot blasting, acid pickling and grinding.

4. The production process of the tower crane dovetail connecting sleeve according to claim 1, wherein a drill is used for drilling, and the diameter of the drill is 39 mm.