Method for manufacturing side plate of dumper

Abstract

The invention discloses a manufacturing method of a dumper sideboard. The manufacturing method comprises the steps that the dumper sideboard is manufactured; the dumper sideboard comprises a sideboard body made of NM450 materials, at least two wedge-shaped grooves protruding outwards are transversely formed in the inner side of the upper middle portion of the sideboard body, and the width of the groove bottom, protruding outwards, of each wedge-shaped groove is smaller than that of an opening. The lower portion of each wedge-shaped groove is connected with the upper portion of the next wedge-shaped groove, so that the two connecting positions are V-shaped grooves protruding inwards, the top ends of the sharp portions of the V-shaped grooves and the inner side of the side plate body are located on the same plane, and the middle V-shaped groove protruding inwards is formed in the maximum stress position when a carriage is in a full-load state. The lower parts of the two side plate bodies form inward transition sections connected with the bottom plate through at least two bending creases from the vertical surfaces to the horizontal surfaces at the bottoms; the preparation method comprises the following steps: S1, blanking; s2, pressing a reverse V-shaped groove; and S3, pressing creases. Compared with the prior art, the problems that an existing dumper carriage is large in weight and small in effective size can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of special-purpose automobile and accessory manufacturing, in particular to a method for manufacturing a side plate of a dump truck compartment. Background Art

[0002] Most of the existing dump truck side plate assemblies are of two structures: grid side plates and U-shaped double V side plates. The grid side plates include upper and lower frames on the upper and lower edges of the side plate body, and columns are arranged on the inside of the side plate body. In order to ensure strength and impact resistance, the side plates and bottom plates of the carriage are equipped with multiple ribs. The upper and lower frames, columns and ribs form a grid shape. Due to the large number of ribs, the whole side plate is heavy, the grid side plate is wide, and the volume of the whole vehicle is small when the overall dimensions of the whole vehicle are the same. The U-shaped double or multiple V-side plates include two side plate bodies with a vertical surface at the bottom and a horizontal surface at the bottom, which are formed by at least two bending folds to form a transition section connected to the bottom plate inward, so that the side plate bodies on both sides form a U-shape with the bottom plate, and the middle and upper parts of the side plate bodies are laterally provided with at least two outwardly protruding V-shaped grooves. Although this structure eliminates the lower frame at the bottom of the side plate body and reduces the unloading resistance at the same time, the double or multiple V structure is used to reduce the weight and increase the impact resistance, and the number of ribs is reduced, but with fewer ribs, the strength of the side plate is low, and the box is prone to expansion and deformation. In addition, the two V-shaped grooves increase the capacity of the car body. Although the purpose of capacity expansion can be achieved, the sudden change of the expansion part of the double V structure is prone to material accumulation in the expansion part. After a period of use, the double V expansion part, i.e., the V-shaped groove, is filled with small broken materials, and the actual transportable volume of the box body is not effectively increased. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a method for manufacturing a side plate of a dump truck, so as to solve the problem that the existing dump truck compartment has a large weight and a small effective volume.

[0004] In order to solve the above problems, the technical solution of the present invention is: the method for manufacturing a dump truck side plate comprises manufacturing a dump truck side plate; The dump truck side plate comprises a side plate body made of NM450 material, at least two outwardly protruding wedge-shaped grooves are transversely arranged on the inner side of the upper middle part of the side plate body, the outwardly protruding groove bottom width of the wedge-shaped groove is smaller than the opening width, the lower part of each wedge-shaped groove is connected to the upper part of the next wedge-shaped groove so that the two connections are inwardly protruding V-shaped grooves, the tip top of the V-shaped groove is in the same plane as the inner side of the side plate body, the middle inwardly protruding V-shaped groove is arranged at the maximum force position when the vehicle body is fully loaded, and the lower parts of the two side plate bodies form an inward transition section connected to the bottom plate through at least two bending folds from the vertical surface to the bottom horizontal surface; The production steps include: S1 blanking: Use NM450 sheet material for blanking and mark the maximum stress position when the carriage is fully loaded; S2 Pressing reverse V-groove: Use a bending machine and a bending die to press out a V-groove convex inward in the side plate body at the marked position. The bending die includes an upper die with a V-shaped mouth and a lower die with a U-shaped structure; S3 crease pressing: using a bending machine and a bending knife, taking the tip of the V-groove as a reference, press out all the creases on the inner side of the side panel body and the raised tip of the V-groove in the same horizontal plane, that is, the uppermost crease of the first wedge-shaped groove of the formed side panel body; then flip the entire side panel body to the other side, that is, the inner side faces upward, at this time the V-groove becomes an inverted V-groove, taking the bottom crease of the inverted V-groove as a reference, press out all the creases on the same horizontal plane with the bottom of the wedge-shaped groove, that is, the second upper crease of the first wedge-shaped groove of the formed side panel body and the second lower crease of the last wedge-shaped groove; then take the lowermost edge of the formed side panel body as a reference, press out other creases in the transition section.

[0005] In the above technical solution, a more specific solution may be: there are two wedge-shaped grooves, and the bottom edge of the lower wedge-shaped groove coincides with the uppermost two folds of the transition section.

[0006] Furthermore: the transition section of the side panel body includes three folds from the vertical surface to the horizontal surface of the side panel body.

[0007] Furthermore: the upper die of the bending die is a V-shaped upper die with a sharp angle of 79°.

[0008] Furthermore: the bending knife used in step S3 is a straight knife, and the bending machines in steps S2 and S3 are both 2500-ton bending machines.

[0009] Further: in step S3, when the second upper fold of the first wedge-shaped groove and the second lower fold of the last wedge-shaped groove of the side panel body are pressed out, after the second upper fold of the first wedge-shaped groove of the side panel body is pressed out, the side panel body is horizontally rotated 180°, and then the second lower fold of the last wedge-shaped groove of the side panel body is pressed out.

[0010] Further: in step S3, when pressing out other creases in the transition section, multiple creases are pressed out in sequence from top to bottom along the formed side panel body, or multiple creases are pressed out in sequence from bottom to top along the formed side panel body, or a certain crease is used as a reference, and multiple creases are pressed out from the crease to both sides in sequence. Each time a crease is pressed, the force is remeasured and the force trend and stress rebound force are analyzed, the data of the pressed creases are optimized, and then the reference is repositioned and the next crease is pressed.

[0011] Further: in step S3, when other creases in the transition section are pressed out, they are pressed out from top to bottom along the formed side panel body, or from bottom to top along the formed side panel body. Each time a crease is pressed, the force is remeasured and the force trend and stress rebound force are analyzed, the data of the pressed crease is optimized, and then the reference is repositioned and the next crease is pressed.

[0012] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: The manufacturing method of the dump truck side plate can increase the expansion volume without changing the material strength by changing the original double or multiple V-shaped grooves into double or multiple wedge-shaped grooves, and the middle vertical section and the lower inclined section of the wedge-shaped groove form a unloading space, and the defect of frequent accumulation of materials in the smaller V-shaped groove will not occur, so that effective expansion is truly achieved; the reverse V-shaped groove structure between the two multiple wedge-shaped grooves decomposes the impact of the material on the side plate, especially when it is set at the maximum stress position when the car body is fully loaded, the stress is decomposed to the maximum extent and the rebound force is increased, and the reverse V-shaped groove structure makes the two adjacent wedge-shaped grooves tightly combined and compact in structure. More importantly, it can also be used as a reference for processing two adjacent wedge-shaped grooves. The entire side plate structure has higher side plate strength, fewer ribs, larger vehicle-mounted volume and lighter total vehicle weight on the basis of the double V-groove structure, and has the characteristics of novel and beautiful appearance, high side plate strength, fewer reinforcing ribs, less welding, low manufacturing cost, light weight, high effective volume, and strong product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of an embodiment of the present invention installed on a side plate assembly of a dump truck; Figure 2 It is a left view of the front view of the embodiment of the present invention installed on the side plate assembly of a dump truck; Figure 3 is a schematic structural diagram of a cross section of an embodiment of the present invention; Markings in the figure: upper frame 1, side plate body 2, wedge-shaped groove 2-1, V-shaped groove 2-2, fold 2-3, middle column 3, rear column 4, upper sealing plate 5, guide plate 6. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings: The method for manufacturing the dump truck side plate comprises manufacturing a dump truck side plate, using the dump truck side plate to install the side plate assembly as shown in the figure. Figure 1 , Figure 2 As shown, it includes an upper frame 1 at the upper edge of the side plate body 2, a middle column 3 is evenly distributed on the inner side of the side plate body 2, a rear column 4 is provided at the rear of the side plate body 1, an upper sealing plate 5 is provided on the rear column, and a guide plate 6 is provided at the rear end of the side plate body 1.

[0015] like Figure 3 The dump truck side plate shown in the figure has a side plate body 2 made of NM450 material, and at least two outwardly protruding wedge-shaped grooves 2-1 are laterally arranged on the inner side of the upper middle part of the side plate body, and the outwardly protruding groove bottom width of the wedge-shaped groove is smaller than the opening width. There are two wedge-shaped grooves here, and the bottom edge of the next wedge-shaped groove coincides with the top two folds of the transition section. In other embodiments, there may be three wedge-shaped grooves, and the groove depth of each wedge-shaped groove 2-1 is the same to ensure that the groove bottoms of all wedge-shaped grooves are on the same vertical plane. The widths of every two wedge-shaped grooves 2-1 are not necessarily the same, and the inclination angles on both sides of the width of every two wedge-shaped grooves are The sizes are not necessarily the same, and each wedge-shaped groove 2-1 is not necessarily an equilateral wedge-shaped groove. The width of the wedge-shaped groove and the inclination angles on both sides of the width are obtained based on the force analysis at that location and the data analysis of factors such as the thickness and rebound force of the material. The lower part of each wedge-shaped groove is connected to the upper part of the next wedge-shaped groove so that the two connections are inwardly convex V-shaped grooves 2-2, and the tip of the V-shaped groove is in the same plane as the inner side of the side plate body. The middle inwardly convex V-shaped groove is set at the maximum force position when the car is fully loaded. There is only one inwardly convex V-shaped groove here, which is set at the maximum force position when the car is fully loaded. By changing the original double or multiple V-shaped grooves into double or multiple wedge-shaped grooves, the expansion volume can be increased without changing the material strength, and the middle vertical section and the lower inclined section of the wedge-shaped groove form a unloading space, and the defect of frequent material accumulation in smaller V-shaped grooves will not occur, thus truly realizing effective expansion; the reverse V-shaped groove structure between the two multiple wedge-shaped grooves decomposes the impact of the material on the side plate, especially when it is set at the maximum stress position when the car is fully loaded, so as to decompose the stress and increase the resilience to the maximum extent, and the reverse V-shaped groove structure makes the two adjacent wedge-shaped grooves tightly combined and compact in structure, and more importantly, it can also be used as a reference for processing two adjacent wedge-shaped grooves.

[0016] The lower part of the two side panel bodies 2 forms an inward transition section connected to the bottom plate through at least two bending folds from the vertical surface to the bottom horizontal surface. The transition section of the side panel body here includes three folds 2-3 from the vertical surface to the horizontal surface of the side panel body.

[0017] On the basis that the side plate body 2 has a creased transition section, the corresponding portion of the lower portion of the center column 3 also has a creased transition section, and both are also made of NM450 sheet material.

[0018] The production steps include: S1 cutting: Use NM450 sheet metal for cutting and mark the maximum stress position when the car is fully loaded.

[0019] S2 press reverse V-groove: use a bending machine and a bending die to press out an inward convex V-groove in the side plate body at the marked position. The bending die includes an upper die with a V-shaped mouth and a lower die with a U-shaped structure; the upper die of the bending die is a V-shaped mouth upper die with a sharp angle of 79°.

[0020] S3 crease pressing: using a bending machine and a bending knife, taking the tip of the V-groove as a reference, press out all the creases on the inner side of the side plate body and the raised tip of the V-groove in the same horizontal plane, that is, the uppermost crease of the first wedge-shaped groove of the formed side plate body; then flip the entire side plate body to the other side, that is, the inner side faces up, at this time the V-groove becomes an inverted V-groove, taking the bottom crease of the inverted V-groove as a reference, press out all the creases on the same horizontal plane with the bottom of the wedge-shaped groove, that is, the second upper crease of the first wedge-shaped groove of the formed side plate body and the second lower crease of the last wedge-shaped groove; then take the lowermost edge of the formed side plate body as a reference, press out other creases in the transition section; the bending knife used is a straight knife, and the bending machines are all 2500-ton bending machines.

[0021] In step S3, when the second upper fold of the first wedge-shaped groove and the second lower fold of the last wedge-shaped groove of the side panel body are pressed out, after the second upper fold of the first wedge-shaped groove of the side panel body is pressed out, the side panel body is horizontally rotated 180°, and then the second lower fold of the last wedge-shaped groove of the side panel body is pressed out.

[0022] In step S3, when other creases in the transition section are pressed out, multiple creases are pressed out from top to bottom along the formed side panel body, or multiple creases are pressed out from bottom to top along the formed side panel body, or a certain crease is used as a reference and multiple creases are pressed out from the crease to both sides in sequence. Each time a crease is pressed, the force is remeasured and the force trend and stress rebound force are analyzed, the data of the pressed creases are optimized, and then the reference is repositioned and the next crease is pressed.

[0023] In other embodiments, the transition section of the entire side panel body may have four or five folds. Most of the folds are determined based on the processing technology and actual force analysis. However, the more folds there are, the lower the production efficiency will be, and the force strength may not necessarily be improved. When pressing out the other four or five folds of the transition section in step S3, they are pressed out sequentially from top to bottom along the formed side panel body or from bottom to top along the formed side panel body.

[0024] Today, when the country strictly controls overloading and advocates safe transportation with standard load, users have higher and higher requirements on the effective volume of dump trucks and the weight and driving stability of the whole vehicle. The design concept of heightening the whole vehicle, thickening the ribs and strengthening the vehicle a few years ago has not kept up with the development of the market. Users are in urgent need of vehicles with higher strength, lighter weight and larger volume. Based on this demand of users, our unit has developed a double wedge groove V-groove 5-knife bending side plate structure (this is the best solution) that can further reduce the gravity of the side plate, increase the volume of the box and improve the strength of the side plate. The structural plate adopts NM450 plate, uses special molds and multi-knife bending to form, has a novel and beautiful appearance, expanded structure, greatly improves the strength of the side plate, reduces the number of side plate reinforcement ribs, reduces the amount of side plate welding, reduces manufacturing costs, and increases the effective volume of the car body under the premise of ensuring the overall dimensions of the vehicle, thereby improving product competitiveness. Therefore, the double wedge groove V-groove 5-knife bending side plate structure is more in line with customer needs and more suitable for future market needs.

Claims

1. A method for manufacturing a dump truck side plate, characterized in that: The invention comprises making a dump truck side plate; The dump truck side plate comprises a side plate body made of NM450 material, at least two outwardly protruding wedge-shaped grooves are transversely arranged on the inner side of the upper middle part of the side plate body, the outwardly protruding groove bottom width of the wedge-shaped groove is smaller than the opening width, the lower part of each wedge-shaped groove is connected to the upper part of the next wedge-shaped groove so that the two connections are inwardly protruding V-shaped grooves, the tip top of the V-shaped groove is in the same plane as the inner side of the side plate body, the middle inwardly protruding V-shaped groove is arranged at the maximum force position when the vehicle body is fully loaded, and the lower parts of the two side plate bodies form an inward transition section connected to the bottom plate through at least two bending folds from the vertical surface to the bottom horizontal surface; The production steps include: S1 blanking: Use NM450 sheet material for blanking and mark the maximum stress position when the carriage is fully loaded; S2 Pressing reverse V-groove: Use a bending machine and a bending die to press out a V-groove convex inward in the side plate body at the marked position. The bending die includes an upper die with a V-shaped mouth and a lower die with a U-shaped structure; S3 crease pressing: using a bending machine and a bending knife, taking the tip of the V-groove as a reference, press out all the creases on the inner side of the side panel body and the raised tip of the V-groove in the same horizontal plane, that is, the uppermost crease of the first wedge-shaped groove of the formed side panel body; then flip the entire side panel body to the other side, that is, the inner side faces upward, at this time the V-groove becomes an inverted V-groove, taking the bottom crease of the inverted V-groove as a reference, press out all the creases on the same horizontal plane with the bottom of the wedge-shaped groove, that is, the second upper crease of the first wedge-shaped groove of the formed side panel body and the second lower crease of the last wedge-shaped groove; then take the lowermost edge of the formed side panel body as a reference, press out other creases in the transition section.

2. The method for manufacturing a dump truck side plate according to claim 1, characterized in that: There are two wedge-shaped grooves, and the bottom edge of the next wedge-shaped groove coincides with the top two folds of the transition section.

3. The method for manufacturing a dump truck side plate according to claim 2, characterized in that: The transition section of the side plate body includes three folds from the vertical surface to the horizontal surface of the side plate body.

4. The method for manufacturing a dump truck side plate according to any one of claims 1 to 3, characterized in that: The upper die of the bending die is a V-shaped upper die with a sharp angle of 79 degrees.

5. The method for manufacturing a dump truck side plate according to claim 4, characterized in that: The bending knife used in step S3 is a straight knife, and the bending machines in steps S2 and S3 are both 2500-ton bending machines.

6. The method for manufacturing a dump truck side plate according to claim 5, characterized in that: In step S3, when the second upper fold of the first wedge-shaped groove and the second lower fold of the last wedge-shaped groove of the side panel body are pressed out, after the second upper fold of the first wedge-shaped groove of the side panel body is pressed out, the side panel body is horizontally rotated 180°, and then the second lower fold of the last wedge-shaped groove of the side panel body is pressed out.

7. The method for manufacturing a dump truck side plate according to claim 1, characterized in that: In step S3, when other creases in the transition section are pressed out, multiple creases are pressed out from top to bottom along the formed side panel body, or multiple creases are pressed out from bottom to top along the formed side panel body, or a certain crease is used as a reference and multiple creases are pressed out from the crease to both sides in sequence. Each time a crease is pressed, the force is remeasured and the force trend and stress rebound force are analyzed, the data of the pressed creases are optimized, and then the reference is repositioned and the next crease is pressed.

8. The method for manufacturing a dump truck side plate according to claim 6, characterized in that: In step S3, when other creases in the transition section are pressed out, they are pressed out from top to bottom along the formed side panel body, or from bottom to top along the formed side panel body. Each time a crease is pressed, the force is remeasured and the force trend and stress rebound force are analyzed, the data of the pressed crease is optimized, and then the reference is repositioned and the next crease is pressed.

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