CN115582566A - Manufacturing method of large jaw crusher rear wall - Google Patents

Abstract

The patent of the present invention relates to a method for making the back wall of a large jaw crusher. The manufacturing method includes: Step 1, marking the platform; Step 2, assembling the middle plate; Step 3, assembling the connecting plate; Step 4, assembling the inclined plate parts; Step 5, assembling the inclined plate parts and the overall . The invention adopts technological measures such as control precision of platform scribing and adding appropriate welding shrinkage allowance, thereby achieving good results in improving the welding quality of the rear wall of the jaw crusher.

Description

A method of manufacturing the rear wall of a large jaw crusher

technical field

The invention relates to a method for assembling and welding parts of a jaw crusher, in particular to a method for manufacturing a rear wall of a jaw crusher, and belongs to the technical field of jaw crusher manufacturing.

background introduction

The jaw crusher is commonly known as the jaw crusher, also known as the tiger's mouth. It is mainly composed of the front wall, the rear wall, the movable jaw and other components. It is used in the crushing of various ores and bulk materials in mining smelting, building materials, roads, railways, water conservancy and chemical industries. The rear wall is one of the important components of the jaw crusher. In order to ensure sufficient strength and rigidity to withstand the force that reacts on the crusher during crushing, thick plates are commonly used in the production of the rear wall, resulting in a large amount of welding and welding heat. The input becomes larger, and the welding requirements are higher, and the size after welding is not easy to control and easy to deform. The key points and difficulties of its manufacturing are:

1. The rear wall plates are all ordinary carbon steel, mostly thick plates, the maximum plate thickness is 120mm, which is prone to large welding heat input and deformation, and the welding process is difficult.

2. The two connecting plates of the rear wall are relatively large, and the welding with the middle plate is mainly concentrated in the middle part, and the two ends are easily deformed.

3. The sloping plate in the rear wall forms an angle with the middle plate, and the angle is strictly required, which is difficult to control.

4. Due to the large difference in plate thickness of the rear wall parts, there is a large welding stress in the structure after welding, which has a great impact on the fatigue life of the weld.

Contents of the invention

Aiming at the difficulty in manufacturing the rear wall, the present invention proposes a method for manufacturing the rear wall of a large jaw crusher, which can overcome the difficulty of welding and the dimensional deformation after welding, and improve the overall welding quality of the rear wall.

The present invention is achieved through the following technical solutions:

A method for making the rear wall of a large jaw crusher, the rear wall at least includes a plurality of middle plates, two middle ribs, two connecting plates, two outer ribs and one slanting plate, characterized in that, The concrete steps of described preparation method are as follows:

Step 1, draw a line on the platform

1.1. Check the levelness of the platform to ensure that the levelness error of the platform is ≤2mm within the range of 3 meters in width and 5 meters in length;

1.2. Draw a line on the platform, draw the installation line and dimension line of the first middle board, the second middle board and the third middle board according to the structure of the rear wall, and the first middle board and the third middle board The installation lines of the intermediate plates are parallel to each other, and the installation lines of the second intermediate plate are respectively perpendicular to the installation lines of the first intermediate plate and the third intermediate plate;

Step 2, assemble the middle plate and the middle rib

2.1. According to the installation line of the middle board on the platform, place the three middle boards vertically on the self-installation line and fix them;

2.2. Draw the installation lines of two parallel intermediate ribs on the second intermediate plate;

2.3. Put the two middle ribs together

3.1. Fix the two connecting plates in parallel on the platform, and draw the installation lines of each intermediate plate on the connecting plates respectively. The size deviation is ≤1mm; 3.2. Install the first connecting plate and the second connecting plate, and use spot welding to make them Connection plate and reinforcement;

Step 4, installation of inclined plate components:

4.1. Draw the installation lines of the first rib and the second rib on the inclined plate respectively, and the installation line of the first rib and the installation line of the second rib are parallel to each other;

4.2 Fix the first rib and the second rib on the inclined plate according to the installation line position of the respective rib, and fix them to form the inclined plate components;

Step 5, Inclined plate components and overall assembly

5.1. Install the inclined plate part under the third middle plate, and connect and fix the two connecting plates on both sides;

Step six, overall welding

Fix the above plates by welding, and fix the fourth middle plate between the first middle plate and the second middle plate, so that the first middle plate, the second middle plate, the third middle plate and the fourth middle plate The space is closed in the form of a plate and two connecting plates.

In order to ensure the internal welding of the rear wall shell, the middle plate part 4 is finally installed, and can be welded after installation.

The marking requirements mentioned in Step 1 refer to:

a. The size error of all centerlines is ≤0.5mm;

b. The size error of each position line is ≤1mm;

c. Add 2mm shrinkage allowance between the partitions;

When installing the intermediate board mentioned in step 2, add 2mm shrinkage margin to the size between the boards, and the maximum size error is ≤2mm;

When welding the connecting plate and the intermediate plate described in step three, carbon planing is required. The carbon planing refers to the use of a high-temperature current between the carbon pole and the metal to heat the metal to a molten state, and at the same time use the high-speed airflow of compressed air to blow off the molten metal to remove defects.

The method for making the rear wall of a jaw crusher proposed by the present invention mainly solves the problem that the deformation of the rear wall is difficult to control due to the large amount of welding due to the large parts of the rear wall and the thickness of the plate, and by adding a suitable welding shrinkage allowance and Reasonably adjust the assembly sequence, so that the process is well-organized, easy to manufacture, and the effect after welding is better. The manufacturing method of the large-scale jaw crusher rear wall of the present invention adopts technological measures such as anti-deformation, adjustment of assembly sequence, platform and part marking assembly, etc., which ensures the accuracy of the size and meets the quality requirements of the rear wall.

Description of drawings

Figure 1 is a schematic diagram of the rear wall assembly.

Figure 2 is a schematic diagram of platform marking.

Fig. 3 is a perspective view of the rear wall.

In the figure: the first middle plate 1-1, the second middle plate 1-2, the third middle plate 1-3, the first middle rib 1-4, the second middle rib 1-5, the first connecting plate 2 -1. The second connecting plate 2-2, the inclined plate 3-1, the first rib plate 3-2, the second rib plate 3-3, and the fourth intermediate plate 4.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention cannot be limited by this.

The present invention provides a manufacturing method for manufacturing the rear wall of a large jaw crusher, please refer to FIG. 1 . The rear wall consists of a plurality of middle plates, two middle ribs, two connecting plates, two outer ribs, a slanted plate and other steel plates, wherein the middle plate is located between the two connecting plates, and the two ribs Used to support the middle plate and the inclined plate, the inclined plate is located in the middle of the two connecting plates, below the middle plate, please refer to Figure 1.

The manufacturing method of the rear wall of the large jaw crusher of the present invention is described in detail below through the examples. In the present embodiment, the specific steps of the manufacturing method are as follows:

Step 1, draw a line on the platform

1.1. The assembly process of the rear wall of the large jaw crusher is carried out on a special assembly platform, and the levelness of the platform will directly affect the machining allowance and shape tolerance of the parts, so the platform must be checked before assembly and marking The levelness of the platform shall ensure that the levelness error of the platform within the range of 3 meters in width and 5 meters in length is ≤ 2mm;

1.2. Draw a line on the platform, draw the installation line and dimension line of the first middle plate 1-1, the second middle plate 1-2 and the third middle plate 1-3 according to the structure of the rear wall, and The installation lines of the first middle board 1-1 and the third middle board 1-3 are parallel to each other, and the installation lines of the second middle board 1-2 are respectively perpendicular to the first middle board 1-1 and the third middle board 1-1. The installation line of the middle plate 1-3, see Figure 2, the marking line should meet the following size requirements:

a. The dimensional error of all centerlines is ≤0.5mm,

b. The size error of each position line is ≤1mm,

c. According to the research on the drawings of the back wall, in order to ensure the shrinkage and deformation caused by welding, preheating, pyrotechnic correction and other reasons after welding, a welding shrinkage allowance of 2 mm is added.

Step 2, assemble the middle plate and the middle rib, see Figure 1

2.1. Put the intermediate plates 1-1, 1-2, 1-3 vertically on the platform according to the installation line drawn by the platform, measure with a square to ensure the verticality, assemble and reinforce with spot welding;

2.2. On the third intermediate plate 1-3, draw out the installation lines of the intermediate rib plates 1-4 and 1-5 according to the size and install them, and reinforce them by spot welding;

Step 3, assemble the connection board

3.1. Fix the first connecting plate 2-1 on the platform with a "horse", and draw the installation line of the intermediate plate assembly parts, the size deviation is ≤ 1mm; 3.2. Install the first connecting plate 2-1 and the second connecting plate 2-2, and reinforced by spot welding to ensure the opening size of the two connecting plates;

Step 4, install the inclined plate components

4.1. Make the inclined plate and two external ribs into inclined plate parts, and draw the installation lines of the first rib 3-2 and the second rib 3-3 on the inclined plate 3-1;

4.2. Fix the first rib plate 3-2 and the second rib plate 3-3 on the inclined plate 3-1 according to the installation line positions of the respective rib plates, and reinforce them with spot welding to prevent dimensional deformation;

Step 5, Inclined plate components and overall assembly

5.1. Install the sloping plate part below the third middle plate 1-3, and connect the two connecting plates on both sides respectively. The angle of the sloping plate is strictly required, and it is necessary to make a model with the same angle to fit and assemble to ensure the assembly size and the slope angle.

Step six, overall welding

The above-installed parts are welded as a whole. Before welding, steel pipes need to be installed to strengthen the connecting plate to prevent deformation of the connecting plate. After welding, the welding seam reinforcement should be welded according to the drawings, and then pyrotechnic correction should be carried out.

Step 7, install the middle plate part 4

In order to ensure that the inside of the rear wall housing can be welded, the fourth intermediate plate 4 will be fixed between the first intermediate plate 1-1 and the second intermediate plate 1-2, so that the first intermediate plate 1-1, The second middle plate 1-2, the third middle plate 1-3 and the fourth middle plate 4 form a closed space with the two connecting plates, and welding is performed after installation to complete the fabrication.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. A manufacturing method of a large jaw crusher rear wall is characterized in that the manufacturing method comprises the following specific steps:

step one, marking out a platform

1.1, checking the levelness of the platform, and ensuring that the error of the levelness of the platform is less than or equal to 2mm within the range of 3 meters in width and 5 meters in length;

1.2, marking a line on the platform, marking installation lines and dimension lines of a first middle plate, a second middle plate and a third middle plate according to the structure of the rear wall, wherein the installation lines of the first middle plate and the third middle plate are parallel to each other, and the installation line of the second middle plate is respectively vertical to the installation lines of the first middle plate and the third middle plate;

step two, assembling the middle plate and the middle rib plate

2.1, vertically placing three intermediate plates on a self-feeding installation line according to the installation line of the intermediate plates on the platform, and fixing;

2.2, scribing mounting lines of two parallel middle rib plates on the second middle plate;

2.3, two middle rib plates

3.1, fixing two connecting plates on the platform in parallel, and marking installation lines of each intermediate plate on the connecting plates respectively, wherein the size deviation is less than or equal to 1mm;

3.2, mounting the first connecting plate and the second connecting plate, and spot welding to reinforce the connecting plates;

step four, installing the inclined plate component:

4.1, respectively marking installation lines of a first rib plate and a second rib plate on the inclined plate, wherein the installation lines of the first rib plate and the second rib plate are parallel to each other;

4.2, fixing the first rib plate and the second rib plate on the inclined plate according to the installation line position of each rib plate to form an inclined plate component;

fifthly, assembling the inclined plate part and the whole body

5.1, mounting the inclined plate part below the third middle plate, and respectively connecting and fixing two sides of the inclined plate part with the two connecting plates;

step six, integral welding

And welding and fixing the plates, and fixing a fourth intermediate plate between the first intermediate plate and the second intermediate plate to form a closed space by the first intermediate plate, the second intermediate plate, the third intermediate plate and the fourth intermediate plate and the two connecting plates.

2. The method for manufacturing a rear wall of a large jaw crusher as claimed in claim 1, wherein the marking requirements in the first step are as follows:

a. the dimension error of all central lines is less than or equal to 0.5mm;

b. the dimension error of each position line is less than or equal to 1mm;

c. the size between the intermediate plates is increased and decreased by 2mm.

3. The method for manufacturing the rear wall of the large jaw crusher according to claim 1, wherein when the middle plate is installed in the second step, the shrinkage allowance of 2mm is added to the size between the partition plates, and the maximum size error is less than or equal to 2mm.

4. A method for making a large jaw crusher back wall as claimed in claim 1 wherein carbon gouging is required to weld the web and intermediate plate members in step three.

5. The method as claimed in claim 1, wherein the angle of the inclined plate in step five is guaranteed by manufacturing a sample plate with the same angle for fitting, installing and calibrating, so as to guarantee the angle to be accurate.

6. The method for manufacturing the rear wall of the large jaw crusher according to claim 1, wherein a reinforcing steel pipe is required to be installed during welding in the sixth step, so that the connecting plate is prevented from being deformed when opened.

7. Carbon gouging according to claim 4 is achieved by heating the metal to a molten state by generating a high temperature current between the carbon electrode and the metal and simultaneously blowing the molten metal away by a high velocity stream of compressed air to remove defects.

8. A method for manufacturing a back wall of a large jaw crusher as claimed in claim 1, wherein all parts except the tilt plate need to be installed with angle square to ensure its verticality, and the tilt plate needs to have a template with the same angle to ensure its angle is accurate.

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