A rough-fine linkage type efficient positioning tool for welding a rack

Abstract

The utility model discloses a kind of coarse-fine linkage type efficient positioning tool for welding frame, including welding frame body, the both sides of welding frame body are fixedly installed with side positioning frame, the bottom surface of both ends of two side positioning frames is all opened with fine positioning hole, the bottom end both sides of two side positioning frames are all provided with bearing block, the upper surface of each bearing block is all fixedly installed with upper positioning plate, the both sides of the outer surface of each upper positioning plate are all provided with coarse positioning inclined plate, cylindrical positioning pin is inserted in the bearing block of one end, rhombus positioning pin is inserted in the bearing block of other end, the utility model is inserted by two-step method of " coarse positioning guide plus fine positioning " to complex, rely on artificial skill alignment process, change into a quick, semi-automatic process, entire positioning time can be from traditional mode's several minutes even several ten minutes, shorten to within 20 seconds, significantly improve production rhythm and equipment utilization, improve the positioning assembly speed of welding frame.

Description

Technical Field

[0001] This utility model relates to the field of welding frame positioning and installation technology, specifically a coarse and fine linkage high-efficiency positioning fixture for welding frames. Background Technology

[0002] In modern manufacturing, particularly in fields such as engineering machinery, steel structures, and automobile frames, large welding frames are core load-bearing components, and their welding quality directly determines the performance and safety of the final product. Precise positioning before welding is a crucial prerequisite for ensuring welding quality.

[0003] Currently, the following methods are commonly used for positioning large welding frames: 1. Manual marking and alignment: Workers mark lines on a platform according to drawings, and then manually align the frames using overhead cranes and tools such as crowbars and hammers. This method heavily relies on the workers' experience and sense of responsibility, resulting in low positioning accuracy, low efficiency, high labor intensity, and serious safety hazards.

[0004] 2. Single-function positioning fixtures: Some fixtures only provide rigid positioning points or load-bearing blocks. When a crane is lifting a frame weighing several tons, the operator needs to operate the crane with extreme precision, slowly aligning the positioning holes on the frame with the positioning pins on the fixture. This process is extremely time-consuming and demands a high level of skill from the crane operator; even the slightest mistake can damage the positioning pins or the positioning holes on the frame. The fine-tuning step in the crane operation sequence is a major bottleneck to productivity.

[0005] As can be seen from the above, existing technologies generally suffer from low positioning efficiency, high dependence on manual skills, poor safety, and difficulty in ensuring accuracy when dealing with the positioning problem of large welding frames. Based on the above problems, this utility model proposes a coarse and fine linkage high-efficiency positioning fixture for welding frames. Utility Model Content

[0006] The purpose of this invention is to provide a high-efficiency positioning fixture for roughing and finishing welding frames, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a coarse and fine linkage high-efficiency positioning fixture for welding frames, comprising a welding frame body, side positioning frames fixedly installed on both sides of the welding frame body, fine positioning holes opened on the bottom surfaces of both ends of the two side positioning frames, bearing blocks provided on both sides of the bottom ends of the two side positioning frames, an upper positioning plate fixedly installed on the upper surface of each bearing block, coarse positioning inclined plates provided on both sides of the outer surface of each upper positioning plate, a cylindrical positioning pin inserted into one end of the bearing block, and a diamond-shaped positioning pin inserted into the bearing block at the other end.

[0008] Preferably, the coarse positioning inclined plate and the upper positioning plate are integrally formed.

[0009] Preferably, the cylindrical locating pin and the rhomboid locating pin are fitted with a small clearance to the precision locating hole.

[0010] Preferably, the cylindrical locating pin and the rhomboid locating pin are made of 45# steel.

[0011] Preferably, the four carrier blocks are arranged in a mirror-relative configuration.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model transforms the complex alignment process, which relies on manual skills, into a fast, semi-automated process through a two-step method of "coarse positioning guidance plus fine positioning insertion". The entire positioning time can be shortened from several minutes or even more than ten minutes in the traditional method to less than 20 seconds, which significantly improves the production cycle and equipment utilization rate, and increases the positioning and assembly speed of the welding frame.

[0014] Meanwhile, the design and use of coarse and fine positioning structures solve the initial alignment problem in the coarse positioning stage, and the fine positioning stage ensures the final positioning accuracy and repeatability through the high-precision two-pin positioning insertion, eliminates human error, ensures the consistency of welding quality, and improves positioning accuracy.

[0015] Furthermore, safety is significantly enhanced. By reducing the precision requirements for crane operation, hard collisions between workpieces and tooling caused by operational errors are avoided, protecting the safety of equipment and operators, and reducing safety hazards during positioning and assembly. At the same time, by improving efficiency, reducing scrap rates, and reducing reliance on highly skilled workers, long-term reliance can significantly reduce the company's overall manufacturing costs and improve economic benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the positioning tooling assembly structure according to an embodiment of the present utility model;

[0017] Figure 2 This is an embodiment of the present utility model. Figure 1 A magnified structural diagram of region A;

[0018] Figure 3 This is a schematic diagram of the cylindrical positioning pin structure on the upper surface of the bearing block in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the diamond-shaped positioning pin structure on the upper surface of the bearing block in an embodiment of this utility model.

[0020] In the diagram: 1. Welding frame; 2. Side positioning frame; 3. Precision positioning hole; 4. Bearing block; 5. Upper positioning plate; 6. Coarse positioning inclined plate; 7. Cylindrical positioning pin; 8. Rhomboid positioning pin. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-4 This utility model provides an embodiment of a coarse and fine linkage high-efficiency positioning fixture for a welding frame, comprising a welding frame body 1, with side positioning frames 2 fixedly installed on both sides of the welding frame body 1, and fine positioning holes 3 opened on the bottom surfaces of both ends of the two side positioning frames 2, and bearing blocks 4 provided on both sides of the bottom end of the two side positioning frames 2. The bearing blocks 4 are used to support the four corners of the side positioning frames 2 of the welding frame. The four bearing blocks 4 are arranged in a mirror image relative to each other. In actual use, the four bearing blocks 4 are fixedly installed on a bearing platform to ensure its stability and prevent movement.

[0025] Each bearing block 4 has an upper positioning plate 5 fixedly installed on its upper surface. Each upper positioning plate 5 has a coarse positioning inclined plate 6 on both sides of its outer surface. When the welding frame body 1 is positioned, the coarse positioning inclined plate 6 can provide a certain guiding positioning work. The side positioning frame 2 of the welding frame body 1 can slide down onto the upper top plate 5 through the coarse positioning inclined plate 6 to complete the coarse positioning work.

[0026] For further details, please refer to the appendix to the instruction manual. Figure 3 as well as Figure 4 As shown, a cylindrical positioning pin 7 is inserted into the bearing block 4 at one end, and a rhomboid positioning pin 8 is inserted into the bearing block 4 at the other end. When these positioning pins of different shapes are used for positioning, the cylindrical positioning pin 7 is used to completely limit the translational degrees of freedom in two dimensions, while the rhomboid positioning pin 8 only limits the translational degrees of freedom in one dimension, thereby avoiding the over-positioning problem caused by the error in the center distance between the two holes and improving the positioning accuracy of the pin shaft.

[0027] In this embodiment, in order to improve the high-precision positioning and fitting effect, the cylindrical positioning pin 7 and the rhomboid positioning pin 8 are fitted with a small clearance with the precision positioning hole 3. The tolerance is g6 tolerance grade, so as to ensure that the final positioning accuracy reaches ±0.1mm or higher, thereby improving the positioning and assembly accuracy.

[0028] In this embodiment, the cylindrical locating pin 7 and the rhomboid locating pin 8 are made of No. 45 steel to ensure their structural strength and improve their wear resistance and service life.

[0029] In this embodiment, the coarse positioning inclined plate 6 and the upper positioning plate 5 are integrally formed.

[0030] Working principle: When the rough and fine linkage high-efficiency positioning fixture of this utility model is used to position and assemble the welding frame, the crane lifts the welding frame to the top of the fixture and begins to descend. Precise alignment is not required at this stage.

[0031] The frame then continues to descend, with its side positioning frames 2 contacting the coarse positioning ramps 6 of the four bearing blocks 4. The frame is then guided along the ramp by the coarse positioning ramps 6 of the upper positioning plate 5, allowing it to slide onto the upper surface of the upper positioning plate 5. Under the guidance of gravity, the frame automatically slides towards the center until it is completely placed on the upper positioning plate 5. The movement of the frame is then restricted by the inner wall of the coarse positioning ramps 6. At this point, the X and Y axis plane positions of the welding frame are constrained within a small range, and the fine positioning holes 3 at the bottom are roughly aligned with the retracted cylindrical positioning pins 7 and rhomboid positioning pins 8 below. This process requires no manual intervention, greatly improving efficiency, thus completing the coarse positioning assembly of the welding frame.

[0032] After the welding frame is stabilized under the constraints of the upper positioning plate 5 and the coarse positioning inclined plate 6, the external control system issues a command to drive the lifting positioning mechanism to operate. The lifting structure drives the cylindrical positioning pin 7 and the rhomboid positioning pin 8 to rise. The cylindrical positioning pin 7 and the rhomboid positioning pin 8 rise from the bottom of the bearing block 4 and are inserted. The conical cylinder and the rhomboid corner inlet end of the cylindrical positioning pin 7 and the rhomboid positioning pin 8 first contact the edge of the precision positioning hole 3 and finally completely insert into the precision positioning hole 3. Through the combination of the cylindrical positioning pin 7 and the rhomboid positioning pin 8, all degrees of freedom of the welding frame in the plane are completely eliminated, and the final high-precision positioning work is completed.

[0033] It should be noted that the above-mentioned lifting positioning mechanism is a simple lifting structure, which is used to drive the positioning pin to rise linearly, and can be a cylinder structure or other driving structure.

[0034] Based on the above structure, this utility model transforms the complex alignment process that relies on manual skills into a fast, semi-automated process through a two-step method of "coarse positioning guidance plus fine positioning insertion". The entire positioning time can be shortened from several minutes or even more than ten minutes in the traditional method to less than 20 seconds, which significantly improves the production cycle and equipment utilization rate, and increases the positioning and assembly speed of the welding frame.

[0035] Meanwhile, the design and use of coarse and fine positioning structures solve the initial alignment problem in the coarse positioning stage, and the fine positioning stage ensures the final positioning accuracy and repeatability through the high-precision two-pin positioning insertion, eliminates human error, ensures the consistency of welding quality, and improves positioning accuracy.

[0036] Furthermore, safety is significantly enhanced. By reducing the precision requirements for crane operation, hard collisions between workpieces and tooling caused by operational errors are avoided, protecting the safety of equipment and operators, and reducing safety hazards during positioning and assembly. At the same time, by improving efficiency, reducing scrap rates, and reducing reliance on highly skilled workers, long-term reliance can significantly reduce the company's overall manufacturing costs and improve economic benefits.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-efficiency positioning fixture for roughing and finishing linkage for welding frames, comprising a welding frame body (1), characterized in that, Side positioning frames (2) are fixedly installed on both sides of the welding frame body (1). Precision positioning holes (3) are opened on the bottom surfaces of both ends of the two side positioning frames (2). Bearing blocks (4) are provided on both sides of the bottom end of the two side positioning frames (2). An upper positioning plate (5) is fixedly installed on the upper surface of each bearing block (4). Coarse positioning inclined plates (6) are provided on both sides of the outer surface of each upper positioning plate (5). A cylindrical positioning pin (7) is inserted into the bearing block (4) at one end, and a diamond-shaped positioning pin (8) is inserted into the bearing block (4) at the other end.

2. The high-efficiency positioning fixture for roughing and finishing linkage for welding frames according to claim 1, characterized in that: The coarse positioning inclined plate (6) and the upper positioning plate (5) are integrally formed.

3. The high-efficiency positioning fixture for roughing and finishing linkage for welding frames according to claim 1, characterized in that: The cylindrical locating pin (7) and the rhomboid locating pin (8) are fitted with a small clearance to the precision locating hole (3).

4. The high-efficiency positioning fixture for roughing and finishing linkage for welding frames according to claim 1, characterized in that: The cylindrical locating pin (7) and the rhomboid locating pin (8) are made of No. 45 steel.

5. The high-efficiency positioning fixture for roughing and finishing linkage for welding frames according to claim 1, characterized in that: The four carrier blocks (4) are arranged in a mirror-relative configuration.

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