Point splicing method and point splicing tool suitable for material grabbing machine tower structure

Abstract

The invention discloses a point splicing method and a point splicing tool suitable for a material grabbing machine tower structure, belongs to the technical field of engineering machinery assembly, and aims to solve the problems of efficiency and safety of point splicing of an existing tower structure. The four point splicing tools are placed on the periphery of the middle plate assembly, and the supporting faces face the middle plate assembly; the first side plate, the second side plate, the third side plate and the fourth side plate are placed on the supporting faces of the four point splicing tools respectively through hoisting equipment; the length of the jacking rods is adjusted, so that the jacking rods drive the first side plate, the second side plate, the third side plate and the fourth side plate to move till the jacking rods are spliced with the middle plate assembly; performing splicing point detection on the preliminarily spliced workpieces, and judging whether the splicing point size of the current workpiece is qualified or not; if the size of the splicing point is unqualified, the jacking rod is adjusted again, and the position of the side plate is locally and finely adjusted until the splicing point is qualified; and if the splicing point size is qualified, finishing the splicing point of the tower structure.

Description

Technical Field

[0001] The invention relates to a point-joining method and a point-joining tooling applicable to a tower structure of a material grabber, and belongs to the technical field of engineering machinery assembly. Background Art

[0002] The tower structure of the grabber in the prior art is a four-sided table structure, including a combination of multiple side panels and a middle panel assembly. The usual assembly method is horizontal assembly, that is, the first side panel is first placed horizontally, and then the middle panel assembly is flipped and hoisted to the upper bottom position of the first side panel, the angle is adjusted and the middle panel assembly is fixed, and then the remaining side panels are flipped and hoisted in turn to be assembled with the middle panel assembly respectively. However, when assembling each plate, an assembly error will occur between the plates, which will eventually cause the assembly work to be interrupted or the middle panel assembly is not centered after assembly, resulting in failure to pass the inspection.

[0003] Secondly, different supporting tools are needed to assist in assembly. For example, the middle plate assembly needs to be supported by the middle plate supporting tool to prevent it from tipping over, resulting in a low safety factor in the production process. When assembling other side panels and middle plate components, because the side panels are perpendicular to the horizontal plane, the side panels also need to be supported by special side plate supporting tools to prevent them from shifting and falling off, which also results in a low production safety factor.

[0004] In addition, the plate parts of the grabber tower structure are too large, which limits their handling, inspection and transportation. If the assembly points are not up to standard, it will increase the difficulty of rework. Summary of the invention

[0005] The purpose of the present invention is to provide a point splicing method and point splicing tooling suitable for a grabber tower structure, which can solve the problems in the background technology. By using the point splicing tooling and detection equipment, the point splicing process of the grabber tower structure is assisted and detected in real time, thereby ensuring the point splicing quality of the grabber tower structure.

[0006] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0007] On the one hand, the present invention provides a method for joining points of a tower structure of a material grabber, comprising:

[0008] Place the middle plate assembly horizontally and fix it within the layout line of the platform, and the edges of the middle plate assembly coincide with the layout line;

[0009] Place four assembly point fixtures around the middle plate assembly respectively, with the support surface facing the middle plate assembly; wherein a plurality of tension rods are provided on the support surface, for obliquely supporting a plurality of side plates through the plurality of tension rods;

[0010] Use the lifting equipment to place the first side panel, the second side panel, the third side panel and the fourth side panel on the supporting surfaces of the four assembly point fixtures respectively;

[0011] Adjust the length of the jacking rod so that the jacking rod drives the first side plate, the second side plate, the third side plate and the fourth side plate to move respectively until they stop after being spliced ​​with the middle plate assembly;

[0012] Perform joint point inspection on the initially spliced ​​workpieces to determine whether the current workpiece joint point dimensions are qualified; if the joint point dimensions are unqualified, readjust the tightening rods and locally fine-tune the side panel positions until they are qualified; if the joint point dimensions are qualified, the tower structure joint point is completed.

[0013] Optionally, the first side panel, the second side panel, the third side panel and the fourth side panel are respectively placed on the supporting surfaces of the four assembly point toolings by means of a lifting device, including:

[0014] Place the first side panel on the first assembly point tooling support surface with the help of lifting equipment;

[0015] Then place the fourth side panel on the support surface of the fourth assembly point tooling, and finally hoist the second side panel and the third side panel to the corresponding assembly point tooling in sequence.

[0016] Optionally, the workpieces that have been preliminarily spliced ​​are tested for splicing points to determine whether the size of the current workpiece splicing points is qualified, including:

[0017] Projecting from the edges of the first side panel, the second side panel, the third side panel and the fourth side panel to the platform respectively by means of a laser level, and moving the laser level along the edges of the first side panel, the second side panel, the third side panel and the fourth side panel;

[0018] During the movement and projection of the laser level, the projection track of the laser level on the platform is recorded, thereby forming the projection lines of the first side panel, the second side panel, the third side panel and the fourth side panel of the current stitching point;

[0019] Compare the projection lines of the first side panel, the second side panel, the third side panel and the fourth side panel with the layout line of the layout area to obtain the deviation values ​​of the first side panel, the second side panel, the third side panel and the fourth side panel;

[0020] According to the design requirements, the deviation values ​​of the first side plate, the second side plate, the third side plate and the fourth side plate are judged to obtain whether the size of the current workpiece joint point is qualified;

[0021] The layout area is formed by placing qualified samples of the grabber tower structure on the platform in advance, projecting the samples onto the platform at a top-down angle and drawing layout lines along the projection after the samples are inverted, so as to form a layout area with layout lines in standard positions. This ensures that the middle plate assembly, the first side plate, the second side plate, the third side plate and the fourth side plate of the sample can be completely projected on the platform;

[0022] Optionally, the weight of the middle plate assembly is greater than the weight of the first side plate, the second side plate, the third side plate and the fourth side plate.

[0023] Optionally, the first side panel, the second side panel, the third side panel and the fourth side panel are all isosceles trapezoidal panels;

[0024] The length of the bottom edge of the first side panel is equal to the length of the bottom edge of the fourth side panel, and is greater than the length of the bottom edges of the second side panel and the third side panel;

[0025] The bottom sides of the second side plate and the third side plate are equal in length.

[0026] In a second aspect, the present invention provides a point assembly tool suitable for a tower structure of a material grabber, based on the four point assembly tools in the above-mentioned point assembly method, including: a first point assembly tool, a second point assembly tool, a third point assembly tool and a fourth point assembly tool;

[0027] The first assembly point tooling and the fourth assembly point tooling are arranged opposite to each other, and the second assembly point tooling and the third assembly point tooling are arranged opposite to each other.

[0028] Optionally, the first point assembly tool, the second point assembly tool, the third point assembly tool and the fourth point assembly tool all include:

[0029] A supporting surface, the supporting surface is formed by connecting a plurality of inclined rods, a first crossbeam, a second crossbeam and a base, and is used for placing the side panels;

[0030] A plurality of vertical poles, one end of each vertical pole is mounted on the base, and the other end is connected to the first crossbeam at the top of the support surface, for stabilizing the support surface;

[0031] A plurality of support rods, one end of each support rod is connected to the middle of a single vertical pole, and the other end is installed at the edge of the base, so as to strengthen each vertical pole;

[0032] A plurality of tension rods, which are arranged on the support surface through a mounting assembly and are used to adjust the position of the side panels placed on the support surface;

[0033] A plurality of middle connecting rods, each of which is connected to the middle of each vertical pole, and the other end of which is connected to the middle of another vertical pole or to the diagonal rod, for simultaneously reinforcing the support surface, the vertical poles and the support poles;

[0034] The support surface is an isosceles trapezoid, and the trapezoidal surface forms an acute angle with the horizontal plane. The projection of the trapezoidal support surface coincides with the base, and is used to provide a support function for the trapezoidal side panels.

[0035] Optionally, one end of each of the diagonal rods is mounted on an edge of the base away from the support rod, and the other end is connected to the first crossbeam;

[0036] The length of the first cross beam is greater than that of the second cross beam, and the second cross beam is transversely connected to all the inclined rods near the base.

[0037] Optionally, the mounting assembly includes a mounting block and a mounting rod, the mounting block is directly mounted on the first cross beam and the second cross beam, and the mounting block is also fixed to a plurality of inclined rods through the mounting rod and is located between the first cross beam and the second cross beam.

[0038] Optionally, the multiple tightening rods all include an adjusting screw and a tightening block; the adjusting screw passes through the mounting block, and the tightening block is connected to the end of the adjusting screw. The tightening block is in direct contact with the side panel and also has anti-slip and buffering functions to prevent the side panel from falling off and being scratched during the adjustment process.

[0039] Optionally, a plurality of lifting ears are also installed on the base.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. By using the splicing tooling and testing equipment to assist and detect the splicing process of the grabber tower structure in real time, the splicing quality of the grabber tower structure is ensured.

[0042] 2. Place the heaviest middle plate assembly horizontally as a fixed part, so that the middle plate assembly is in a flipped state facing the supporting surfaces of the four assembly point tooling. With the help of the lifting device, place multiple lighter side panels on the supporting surfaces in turn to form movable panels for assembly points. The assembly point positions of the side panels are guided by the layout lines in the layout area, which improves the assembly safety while improving the assembly efficiency and quality.

[0043] 3. The deviation value can be quickly obtained by comparing the projection line with the layout line, and the size of the joint point can be checked without the help of three-coordinate measurement, which improves the measurement efficiency and saves equipment resources.

[0044] 4. This method can be used in any workshop with sufficient space without site restrictions. The assembly tooling is simple to operate, has low manufacturing costs, and can be flexibly transferred as needed.

[0045] 5. Use an inverted assembly method instead of a horizontal assembly method. The center of gravity of the four-sided table workpiece after assembly is close to the bottom surface, and the center of gravity is located on the center line of the four-sided table. Direct lifting makes the center of gravity lower and more stable, so it is not easily affected by external forces and tipping over. Therefore, during the transportation process, there is no need for additional flipping. Direct lifting and transportation can also save operation time and reduce safety hazards.

[0046] 6. In addition, the assembly point tooling is designed to fit the shape of the side panel, and multiple tightening rods are arranged on the supporting surface to achieve local fine-tuning of the position of the side panel assembly points, making it easier to control the accuracy of the position and size of the side panel assembly points. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The figure shows an embodiment of the existing point-matching method;

[0048] Figure 2 The figure is a flow chart of the method for joining points of the tower structure of the material grabber according to the present invention;

[0049] Figure 3 The figure shows a schematic diagram of the structure of the tower structure of the material grabber applicable to the present invention;

[0050] Figure 4 The figure shows the structure schematic diagram of the point-joining tooling of the present invention;

[0051] Figure 5 Shown is a front view of the stitching tool of the present invention;

[0052] Figure 6 Shown is a side view of the stitching tool of the present invention;

[0053] Figure 7 Shown is a top view of the stitching tool of the present invention;

[0054] Figure 8 The figure shows an embodiment of the point-joining method and the point-joining tooling of the present invention;

[0055] Fig. 9 Shown is a top view of the workpiece on the platform after the points are spliced ​​according to the present invention.

[0056] In the figure: 11 middle plate assembly, 12 first side plate, 13 second side plate, 14 third side plate, 15 fourth side plate, 1a first assembly point tooling, 1b second assembly point tooling, 1c third assembly point tooling, 1d fourth assembly point tooling, 20 diagonal rod, 21 supporting surface, 22 vertical rod, 23 middle connecting rod, 24 supporting rod, 25 tightening rod, 250 adjusting screw, 251 tightening block, 26 mounting assembly, 260 mounting block, 261 mounting rod, 27, base, 28 first cross beam, 29 second cross beam, 3 lifting ears, 4 platform. DETAILED DESCRIPTION

[0057] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0058] Example 1

[0059] This embodiment introduces the prior art point-matching method in detail, and the point-matching process is demonstrated as follows: Figure 1As shown in Figures a to d in the figure, the method usually adopted is horizontal splicing, that is, the first side panel 12 is first placed horizontally, and then the middle panel assembly 11 is turned over and hoisted at the upper bottom position of the first side panel 12, the angle is adjusted and the middle panel assembly 11 is fixed, and then the remaining side panels are turned over and hoisted in turn to be assembled with the middle panel assembly 11 respectively. However, when splicing each plate, there will be splicing errors between the plates, which will eventually cause the splicing work to be interrupted or the middle panel assembly 11 is not centered after splicing, resulting in failure to pass the inspection.

[0060] Secondly, there are other problems with the workpieces that are assembled using this method, as follows:

[0061] (1) The angle between the middle plate assembly 11 and the first side plate 12 is an obtuse angle, which makes it difficult to ensure the positioning angle of the two materials after the middle plate assembly 11 is assembled. The deviation of the positioning angle of the middle plate assembly 11 will make it difficult to carry out the subsequent assembly.

[0062] (2) When the middle plate assembly 11 is assembled, it must be supported by supporting tooling to prevent it from tipping over, and the safety factor is low during the production process;

[0063] (3) When the second side plate 13 and the third side plate 14 are assembled, they must be supported by supporting fixtures to prevent them from tipping over. Because the two materials are perpendicular to the horizontal plane, both sides of the materials need to be supported, and the safety factor during the production process is low;

[0064] (4) Due to the large size of the workpiece, it is difficult to inspect the relevant dimensions using traditional methods. After the points are assembled, the workpiece needs to be turned over and transferred to the three-coordinate room to inspect whether the points are qualified. If the points are unqualified, rework is required.

[0065] Example 2

[0066] This embodiment provides a method for joining points applicable to the tower structure of a material grabber, such as Figure 2 Shown include:

[0067] Step 1: Place the middle plate assembly 11 horizontally and fix it within the layout line of the platform 4, and the edges of the middle plate assembly 11 coincide with the layout line;

[0068] Step 2: Place four assembly point tools around the middle plate assembly 11, with the support surface 21 facing the middle plate assembly 11; wherein a plurality of jacking rods 25 are provided on the support surface 21, for obliquely supporting the plurality of side plates through the plurality of jacking rods 25;

[0069] Step 3: Use a hoisting device to place the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 on the supporting surfaces 21 of the four assembly point fixtures respectively;

[0070] Step 4, adjusting the length of the jacking rod 25 so that the jacking rod 25 drives the first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 to move respectively until they stop after being spliced ​​with the middle plate assembly 11;

[0071] Step 5: Check the points of the initially spliced ​​workpieces to determine whether the current workpiece splicing point size is qualified; if the splicing point size is unqualified, readjust the jacking rod 25 and locally fine-tune the side panel position until it is qualified; if the splicing point size is qualified, the splicing of the tower structure is completed.

[0072] like Figure 3 The tower structure of the material grabber in the present embodiment is a four-sided table structure, so the tipping phenomenon that occurs in the prior art method can be greatly avoided by the above-mentioned method.

[0073] Optionally, in step 3, the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 are respectively placed on the support surfaces 21 of the four assembly point fixtures by means of a lifting device, including:

[0074] By means of lifting equipment, the first side panel 12 is placed on the supporting surface 21 of the first assembly point tooling 1a;

[0075] Next, the fourth side panel 15 is placed on the support surface 21 of the fourth assembling point fixture 1d, and finally the second side panel 13 and the third side panel 14 are hoisted in sequence to the corresponding assembling point fixtures.

[0076] Optionally, in step 5, the preliminary spliced ​​workpieces are inspected for splicing points to determine whether the current workpiece splicing point size is qualified, such as Fig. 9 Shown include:

[0077] Project the laser level from the edges of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 to the platform 4, and move the laser level along the edges of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15;

[0078] During the movement and projection process of the laser level, the projection track of the laser level on the platform 4 is recorded, thereby forming the projection lines of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 of the current stitching point;

[0079] Compare the projection lines of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 with the lofting line of the lofting area to obtain the deviation values ​​of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15;

[0080] According to the design requirements, the deviation values ​​of the first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 are judged to obtain whether the size of the current workpiece joint point is qualified;

[0081] The layout area in this embodiment is formed by placing qualified samples of the grabber tower structure on the platform 4 in advance, projecting the samples onto the platform 4 at a top-down angle after the samples are inverted, and drawing layout lines along the projection to form a layout area with standard position layout lines. This ensures that the middle plate assembly 11, the first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 of the samples can be completely projected onto the platform 4;

[0082] At the same time, for different types of tooling with different sizes, the design requirements can be stored in the terminal device before assembly. By utilizing the powerful data search and computing capabilities of the terminal device, the deviation values ​​of the first side panel 12, the second side panel 13, the third side panel 14 and the fourth side panel 15 can be directly input to quickly obtain the result of whether the current workpiece assembly size is qualified.

[0083] Optionally, the weight of the middle plate assembly 11 is greater than the weight of the first side plate 12 , the second side plate 13 , the third side plate 14 and the fourth side plate 15 .

[0084] Optionally, the first side plate 12, the second side plate 13, the third side plate 14 and the fourth side plate 15 are all isosceles trapezoidal plates;

[0085] The length of the bottom edge of the first side panel 12 is equal to the length of the bottom edge of the fourth side panel 15 , and is greater than the length of the bottom edges of the second side panel 13 and the third side panel 14 ;

[0086] The bottom sides of the second side plate 13 and the third side plate 14 are equal in length.

[0087] Example 3

[0088] This embodiment provides a point-jointing tool suitable for the tower structure of a material grabber, based on the four point-jointing tooling in the above-mentioned point-joining method, such as Figure 8 The figure includes: a first assembly point tool 1a, a second assembly point tool 1b, a third assembly point tool 1c and a fourth assembly point tool 1d;

[0089] The first assembly point tooling 1a and the fourth assembly point tooling 1d are arranged opposite to each other, and the second assembly point tooling 1b and the third assembly point tooling 1c are arranged opposite to each other.

[0090] Optional, such as Figures 4 to 7 The first assembly point tooling 1a, the second assembly point tooling 1b, the third assembly point tooling 1c and the fourth assembly point tooling 1d shown in the figure all include: a support surface 21, a vertical rod 22, a support rod 24, a top rod 25 and a middle connecting rod 23, and the number of the vertical rod 22, the support rod 24, the top rod 25 and the middle connecting rod 23 is multiple;

[0091] Among them, one end of each upright pole 22 is installed on the base 27, and the other end is connected to the first crossbeam 28 at the top of the supporting surface 21, so as to stabilize the supporting surface 21; one end of each support rod 24 is respectively connected to the middle part of a single upright pole 22, and the other end is installed at the edge of the base 27, so as to strengthen each upright pole 22; the multiple tightening rods 25 are arranged on the supporting surface 21 through the mounting assembly 26, so as to adjust the position of the side panel placed on the supporting surface 21; each middle connecting rod 23 is connected to the middle part of each upright pole 22, and the other end is connected to the middle part of another upright pole 22 or to the inclined rod 20, so as to simultaneously strengthen the supporting surface 21, the upright pole 22 and the support rod 24; the supporting surface 21 is an isosceles trapezoid, and the trapezoidal surface forms an acute angle with the horizontal plane, and the projection of the trapezoidal supporting surface 21 coincides with the base 27, so as to provide a supporting function for the trapezoidal side panels.

[0092] Optionally, one end of each of the diagonal rods 20 is mounted on an edge of the base 27 away from the support rod 24, and the other end is connected to the first crossbeam 28;

[0093] The length of the first cross beam 28 is greater than that of the second cross beam 29. The second cross beam 29 is laterally connected to all the diagonal rods 20 near the base 27. Thus, the support surface 21 is formed by connecting multiple diagonal rods 20, the first cross beam 28, the second cross beam 29 and the base 27 for placing the side panels.

[0094] Optionally, the mounting assembly 26 includes a mounting block 260 and a mounting rod 261. The mounting block 260 is directly mounted on the first cross beam 28 and the second cross beam 29. The mounting block 260 is also fixed to a plurality of diagonal rods 20 through the mounting rod 261 and is located between the first cross beam 28 and the second cross beam 29. The stability of the support surface 21 is further reinforced by the first cross beam 28 and the second cross beam 29, the number of mounting blocks 260 is increased, the side panel adjustment points are densified, and fine-tuning of the side panels is achieved.

[0095] Optionally, the multiple tightening rods 25 all include an adjusting screw 250 and a tightening block 251; the adjusting screw 250 passes through the mounting block 260, and the tightening block 251 is connected to the end of the adjusting screw 250. The tightening block 251 is in direct contact with the side panel and also has anti-slip and buffering functions to prevent the side panel from falling off and being scratched during the adjustment process.

[0096] Optionally, a plurality of lifting ears 3 are installed on the base 27, which can cooperate with lifting equipment to achieve transportation and position adjustment.

[0097] In summary, the present invention places the heaviest middle plate assembly 11 as a fixed part horizontally, and the middle plate assembly 11 is thus turned over to face the support surface 21 of the four assembly point tooling. With the help of a hoisting device, a plurality of side panels with lighter weight are placed on the support surface 21 in sequence to form a movable plate for assembly points. The assembly point positions of the side panels are guided by the layout lines in the layout area, thereby improving the assembly point safety while improving the assembly point efficiency and quality. The deviation value can be quickly obtained by comparing the projection line with the layout line, and the assembly point size can be checked without the aid of three-coordinate measurement, which improves the measurement efficiency and saves equipment resources. The present invention is not limited by the site, and any workshop with sufficient space can use this method for assembly points. The assembly point tooling is simple to operate, has a low manufacturing cost, and can be flexibly transferred as needed. The present invention adopts an inverted point-joining method to replace the horizontal point-joining method. The center of gravity of the four-sided pyramid workpiece after the point-joining method is close to the bottom surface, and the center of gravity is located on the center line of the four-sided pyramid. Direct hoisting makes the center of gravity lower and more stable, so it is not easily affected by external forces and tipped over. Therefore, during transportation, no additional flipping is required. Direct hoisting and transportation can also save operation time and reduce safety hazards. In addition, the point-joining tooling of the present invention is designed to fit the shape of the side panel, and a plurality of tightening rods 25 are arranged on the support surface 21 to achieve local fine-tuning of the side panel point-joining position, making it easier to control the accuracy of the side panel point-joining position and size.

[0098] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0099] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A method for joining points of a tower structure of a material grabber, characterized in that: include: Place the middle plate assembly horizontally and fix it within the layout line of the platform, and the edges of the middle plate assembly coincide with the layout line; Place four assembly point fixtures around the middle plate assembly respectively, with the support surface facing the middle plate assembly; wherein a plurality of tension rods are provided on the support surface, for obliquely supporting a plurality of side plates through the plurality of tension rods; Use the lifting equipment to place the first side panel, the second side panel, the third side panel and the fourth side panel on the supporting surfaces of the four assembly point fixtures respectively; Adjust the length of the jacking rod so that the jacking rod drives the first side plate, the second side plate, the third side plate and the fourth side plate to move respectively until they stop after being spliced ​​with the middle plate assembly; Perform joint point inspection on the initially spliced ​​workpieces to determine whether the current workpiece joint point dimensions are qualified; if the joint point dimensions are unqualified, readjust the tightening rods and locally fine-tune the side panel positions until they are qualified; if the joint point dimensions are qualified, the tower structure joint point is completed.

2. The method for joining points of a material grabber tower structure according to claim 1 is characterized in that: Use the lifting equipment to place the first side panel, the second side panel, the third side panel and the fourth side panel on the supporting surfaces of the four assembly point fixtures respectively, including: Place the first side panel on the first assembly point tooling support surface with the help of lifting equipment; Then place the fourth side panel on the support surface of the fourth assembly point tooling, and finally hoist the second side panel and the third side panel to the corresponding assembly point tooling in sequence.

3. The method for joining points of a material grabber tower structure according to claim 1 is characterized in that: Perform joint point detection on the initially spliced ​​workpieces to determine whether the current workpiece joint point size is qualified, including: Projecting from the edges of the first side panel, the second side panel, the third side panel and the fourth side panel to the platform respectively by means of a laser level, and moving the laser level along the edges of the first side panel, the second side panel, the third side panel and the fourth side panel; During the movement and projection of the laser level, the projection track of the laser level on the platform is recorded, thereby forming the projection lines of the first side panel, the second side panel, the third side panel and the fourth side panel of the current stitching point; Compare the projection lines of the first side panel, the second side panel, the third side panel and the fourth side panel with the layout line of the layout area to obtain the deviation values ​​of the first side panel, the second side panel, the third side panel and the fourth side panel; According to the design requirements, the deviation values ​​of the first side plate, the second side plate, the third side plate and the fourth side plate are judged to obtain whether the size of the current workpiece joint point is qualified; Among them, the layout area is formed by pre-placing qualified samples of the grabber tower structure on the platform. After the sample is inverted, the sample is projected onto the platform at a top-down angle and the layout line is drawn along the projection, thereby forming a layout area with a standard position layout line.

4. The method for joining points of a material grabber tower structure according to claim 1 is characterized in that: The weight of the middle plate assembly is greater than the weight of the first side plate, the second side plate, the third side plate and the fourth side plate.

5. The method for joining points of a material grabber tower structure according to claim 1 is characterized in that: The first side plate, the second side plate, the third side plate and the fourth side plate are all isosceles trapezoidal plates; The length of the bottom edge of the first side panel is equal to the length of the bottom edge of the fourth side panel, and is greater than the length of the bottom edges of the second side panel and the third side panel; The bottom sides of the second side plate and the third side plate are equal in length.

6. A point assembly tool suitable for a material grabber tower structure, characterized in that: The four point-matching tooling used in the point-matching method of claim 1 include: a first point-matching tooling, a second point-matching tooling, a third point-matching tooling and a fourth point-matching tooling; The first assembly point tooling and the fourth assembly point tooling are arranged opposite to each other, and the second assembly point tooling and the third assembly point tooling are arranged opposite to each other.

7. The point assembly tool for the tower structure of the material grabber according to claim 6 is characterized in that: The first assembly point tooling, the second assembly point tooling, the third assembly point tooling and the fourth assembly point tooling all include: A supporting surface, the supporting surface is formed by connecting a plurality of inclined rods, a first crossbeam, a second crossbeam and a base, and is used for placing the side panels; A plurality of vertical poles, one end of each vertical pole is mounted on the base, and the other end is connected to the first crossbeam at the top of the support surface, for stabilizing the support surface; A plurality of support rods, one end of each support rod is connected to the middle of a single vertical pole, and the other end is installed at the edge of the base, so as to strengthen each vertical pole; A plurality of tension rods, which are arranged on the support surface through a mounting assembly and are used to adjust the position of the side panels placed on the support surface; A plurality of middle connecting rods, each of which is connected to the middle of each vertical pole, and the other end of which is connected to the middle of another vertical pole or to the diagonal rod, for simultaneously reinforcing the support surface, the vertical pole and the support pole; The support surface is an isosceles trapezoid, and the trapezoidal surface forms an acute angle with the horizontal plane. The projection of the trapezoidal support surface coincides with the base, and is used to provide a support function for the trapezoidal side panels.

8. The point-jointing tooling for the tower structure of the material grabber according to claim 7 is characterized in that: One end of each diagonal rod is installed at the edge of the base away from the support rod, and the other end is connected to the first crossbeam; The length of the first cross beam is greater than that of the second cross beam, and the second cross beam is transversely connected to all the inclined rods near the base.

9. The point-jointing tooling for the tower structure of the material grabber according to claim 6 is characterized in that: The mounting assembly comprises a mounting block and a mounting rod. The mounting block is directly mounted on the first cross beam and the second cross beam. The mounting block is also fixed on a plurality of oblique rods through the mounting rod and is located between the first cross beam and the second cross beam.

10. The point-jointing tooling for the tower structure of the material grabber according to claim 6 is characterized in that: The plurality of tightening rods each include an adjusting screw and a tightening block; the adjusting screw passes through the mounting block, and the tightening block is connected to the end of the adjusting screw.

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