Welding positioning device for construction machines

Abstract

The utility model discloses an engineering machinery welding positioning device relates to welding positioning technical field, and it is characterized by including: the positioning frame is provided with the placement surface for supporting cylindrical welding spare on it, the guide groove is set in the center position of placement surface, and it is symmetrically concave setting, is used for guiding cylindrical welding spare sliding to the middle position of guide groove, at least one slot is opened on the guide groove, when the limiting block is located in the guide groove, the triangular area is formed between the limiting block guide groove, when the welding spare is followed the guide groove and rolls, can contact the limiting block of triangular area, can play the oblique force to the welding spare, and the welding spare slows down or stops, and then crosses the limiting block, can play the stepped deceleration effect, effectively protects the surface quality of welding spare, can enter the center position at the bottom of guide groove with lower speed, and positioning is convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of welding positioning, specifically to a welding positioning device for engineering machinery. Background Technology

[0002] In the manufacturing process of engineering machinery, the welding of parts is a key process, and its positioning accuracy directly affects the welding quality and subsequent assembly accuracy.

[0003] In the welding process of cylindrical welded parts (such as hydraulic cylinder bodies, connecting shafts, etc.), due to their inherent structure, stable placement is difficult. Existing technologies typically use an arc-shaped groove, into which the cylindrical welded part is placed. The part automatically enters the middle of the groove, achieving pre-positioning, and is then limited by a limiting structure. However, in actual operation, for the arc-shaped groove to perform precise welding, a certain depth is required. When the welded part enters the bottom of a deeper groove, its speed is high, and there is no way to decelerate, leading to collisions and wear. Therefore, those skilled in the art have provided an engineering machinery welding positioning device to solve the aforementioned problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a welding positioning device for engineering machinery.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A welding positioning device for engineering machinery, comprising:

[0007] A positioning frame, which has a placement surface for supporting cylindrical welded parts;

[0008] A guide groove is provided at the center of the placement surface. It is symmetrically recessed and is used to guide the cylindrical welded part to slide to the middle position of the guide groove.

[0009] At least one slot is formed on the guide groove and is arranged along the width direction of the guide groove;

[0010] Two limiting blocks are symmetrically arranged within the slot and slide synchronously towards or in opposite directions.

[0011] A limiting surface is provided on one side of the limiting block near the center of the guide groove, and the height of the limiting surface decreases uniformly from the side of the guide groove to the center, for limiting the cylindrical welded parts;

[0012] When the limiting block is located in the guide groove, a triangular area is formed between the side of the limiting block near the edge of the limiting surface and the guide groove, which is used to decelerate or stop the cylindrical welded part from sliding down.

[0013] Preferably, when the limiting block is located at one end of the travel near the edge of the guide groove, the limiting block is located below the bottom wall of the guide groove.

[0014] Preferably, the limiting surface is arc-shaped, and the convex surface of the limiting surface is angled upward.

[0015] Preferably, the junction between the limiting surface and the side of the limiting block near the edge of the guide groove is rounded.

[0016] Preferably, a threaded rod is rotatably installed inside the positioning frame, the threaded rod is provided with two sections of threads with opposite directions, and the two limiting blocks are respectively connected to the threaded rod by threads.

[0017] Preferably, multiple slots are arranged in parallel, and one end of each of the multiple threaded rods is fixedly mounted with a sprocket, and the sprockets are connected to each other by a chain.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] When the limiting block is located in the guide groove, a triangular area is formed between the limiting block and the guide groove. When the welded part rolls along the guide groove, it can contact the limiting block in the triangular area, which can exert an upward force on the welded part to slow down or stop it. After passing the limiting block, it can achieve a step-like deceleration effect without the need for an additional braking device. This reduces equipment costs, improves the smoothness of the positioning process, effectively protects the surface quality of the welded part, and allows it to enter the center position at the bottom of the guide groove at a lower speed, which is convenient for positioning. Attached Figure Description

[0020] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0023] Figure 3 This is a frontal cross-sectional view of the limiting block of this utility model in its hidden state.

[0024] Explanation of reference numerals in the attached drawings: 1. Positioning frame; 2. Limiting block; 11. Guide groove; 12. Groove opening; 21. Limiting surface; 22. Threaded rod; 23. Sprocket; 24. Chain. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] A welding positioning device for engineering machinery, with reference to Figure 1-3 ,include:

[0027] Positioning frame 1 has a placement surface for supporting cylindrical welded parts. The placement surface is the upper surface of positioning frame 1 and is a horizontal plane.

[0028] The guide groove 11 is located at the center of the placement surface. It is symmetrically recessed and uses the principle of gravity guidance to guide the cylindrical welded part to slide automatically to the middle position of the guide groove 11 without additional power. This greatly simplifies the positioning operation process and improves the positioning efficiency.

[0029] At least one slot 12 is formed on the guide groove 11 and is set along the width direction of the guide groove 11 to provide sufficient installation and movement space for the limit block 2.

[0030] There are two limit blocks 2 located symmetrically and synchronously sliding in opposite directions within the groove 12. The symmetrical design ensures that the force on both sides of the welded part is uniform, avoiding positioning offset caused by unilateral limiting. The synchronous sliding structure ensures the consistency of positioning accuracy.

[0031] The limiting surface 21 is located on the side of the limiting block 2 near the center of the guide groove 11, and the height of the limiting surface 21 decreases uniformly from the side of the guide groove 11 to the center. This gradual height design allows the welded parts to achieve a smooth transition during the limiting process, avoiding workpiece damage or positioning errors caused by hard collisions. It is used for limiting cylindrical welded parts.

[0032] When the limiting block 2 is located within the guide groove 11, a triangular area is formed between the side of the limiting block 2 near the edge of the limiting surface 21 and the guide groove 11, allowing the cylindrical weldment to slide down and slow down or stop. As the weldment rolls along the guide groove 11, it can contact the limiting block 2 in the triangular area, exerting an upward force on the weldment to slow it down or stop it. Passing the limiting block 2 further provides a stepped deceleration effect. The position of the triangular area can be adjusted by moving the limiting block 2, and can be determined according to the size and weight of the weldment itself. The triangular structure achieves natural deceleration by changing the direction of force on the weldment, eliminating the need for additional braking devices. This reduces equipment costs, improves the smoothness of the positioning process, effectively protects the surface quality of the weldment, and allows it to enter the center position at the bottom of the guide groove 11 at a lower speed, facilitating positioning. When the weldment reaches the bottom of the guide groove 11, the position of the limiting block 2 can be adjusted again to limit the weldment and ensure stability during the welding process.

[0033] When the limiting block 2 is located at one end of the travel near the edge of the guide groove 11, the limiting block 2 is located below the bottom wall of the guide groove 11. This concealed design allows the welded parts to be placed or removed without interference from the limiting block 2, making operation more convenient. At the same time, it avoids damage to the limiting block 2 when it is idle, thus extending the service life of the equipment.

[0034] The limiting surface 21 is set in an arc shape, and the convex surface of the limiting surface 21 is set obliquely upward. When the cylindrical welded part passes the limiting block 2, the arc-shaped limiting surface 21 on the other limiting block 2 can provide upward buffer to reduce the speed. The arc-shaped convex surface design increases the contact area with the welded part and disperses the local pressure. The oblique upward orientation can convert part of the downward force of the welded part into an upward buffer force, realize gradual deceleration, avoid sudden speed drop, and make the deceleration effect better.

[0035] The junction between the limiting surface 21 and the side of the limiting block 2 near the edge of the guide groove 11 is rounded, which not only prevents scratches on the surface of the welded parts, but also reduces stress concentration, improves the structural strength of the limiting block 2 itself, and avoids breakage and damage after long-term use.

[0036] A threaded rod 22 is rotatably installed inside the positioning frame 1. The threaded rod 22 has two sections of threads with opposite directions of rotation, and the two limit blocks 2 are respectively connected to the threaded rod 22 by threads. The reverse thread structure can realize the synchronous opposite or reverse movement of the two limit blocks 2 by rotating a single threaded rod 22, which simplifies the transmission mechanism, reduces the number of parts, and reduces the equipment failure rate. At the same time, the threaded transmission has the characteristics of high precision and strong self-locking, which can ensure that the limit blocks 2 remain stable after positioning and will not be offset due to vibration. The threaded rod 22 can be driven to rotate by a motor.

[0037] Multiple slots 12 are arranged in parallel, and one end of each threaded rod 22 is fixedly mounted with a sprocket 23. The sprockets 23 are connected to each other by a chain 24. The transmission combination of the sprockets 23 and the chain 24 can realize the synchronous rotation of the multiple threaded rods 22, ensuring that all limit blocks 2 move in unison, so that the positioning accuracy of the welded part remains uniform throughout its entire length. This is especially suitable for the precise positioning of long welded parts.

[0038] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A welding positioning device for engineering machinery, characterized in that, include: Positioning frame (1), which is provided with a placement surface for supporting cylindrical welded parts; The guide groove (11) is located at the center of the placement surface. It is symmetrically recessed and is used to guide the cylindrical welded part to slide to the middle position of the guide groove (11). At least one slot (12) is formed on the guide groove (11) and is arranged along the width direction of the guide groove (11); Two limiting blocks (2) are symmetrically arranged and synchronously sliding towards or in opposite directions within the slot (12); A limiting surface (21) is provided on one side of the limiting block (2) near the center of the guide groove (11), and the height of the limiting surface (21) decreases uniformly from the side of the guide groove (11) to the center, for limiting the cylindrical welded parts; When the limiting block (2) is located in the guide groove (11), a triangular area is formed between the side of the limiting block (2) near the edge of the limiting surface (21) and the guide groove (11) to decelerate or stop the downward movement of the cylindrical welded part.

2. The welding positioning device for engineering machinery according to claim 1, characterized in that: When the limiting block (2) is located at one end of the travel near the edge of the guide groove (11), the limiting block (2) is located below the bottom wall of the guide groove (11).

3. The welding positioning device for engineering machinery according to claim 1, characterized in that: The limiting surface (21) is set in an arc shape, and the convex surface of the limiting surface (21) is set obliquely upward.

4. The welding positioning device for engineering machinery according to claim 1, characterized in that: The junction between the limiting surface (21) and the side of the limiting block (2) near the edge of the guide groove (11) is rounded.

5. The welding positioning device for engineering machinery according to claim 1, characterized in that: A threaded rod (22) is rotatably installed inside the positioning frame (1). The threaded rod (22) has two threads with opposite directions, and the two limiting blocks (2) are respectively connected to the threaded rod (22) by threads.

6. The welding positioning device for engineering machinery according to claim 5, characterized in that: Multiple slots (12) are arranged in parallel, and one end of each of the multiple threaded rods (22) is fixedly mounted with a sprocket (23), and the sprockets (23) are connected to each other by a chain (24).

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