A welding tool for a laser welding machine

Abstract

The utility model discloses a welding frock for laser welding machine belongs to laser welding technical field, including the bottom frame, the top of bottom frame is installed the L type board symmetry, is provided with drive mechanism between bottom frame and L type board, one side of L type board has the bidirectional screw rod that rotates, the outside of bidirectional screw rod is symmetrically screwed and is installed the fixed frame, and the side of fixed frame is close all symmetrically and is set up and opens the mouth, and the inner side wall of mouth all articulates has the clamping block, and the other side of fixed frame all rotates and has the screw rod, and the outside of screw rod is screwed and is installed the roof, and the bottom of roof evenly is provided with the resistance rod, and the bottom of resistance rod is through and extends to the inside of mouth, and the bottom of resistance rod is slidably connected with the top of clamping block respectively. The utility model can carry out the quick switching to frock according to the different shape of work piece, realizes the high -efficient steady clamping to round or board type work piece through adjustable clamping block position, to satisfy the diversified welding demand, improve versatility and welding efficiency.

Description

Technical Field

[0001] This utility model relates to a welding fixture, and more particularly to a welding fixture for a laser welding machine, belonging to the field of laser welding technology. Background Technology

[0002] In the prior art, such as the utility model application with application number 201620647664.1, a welding fixture for a laser welding machine is disclosed. One fixture can be installed on each base, or multiple fixtures can be arranged side-by-side on the base. The base can move left and right mechanically. The movable base can be disassembled and reassembled; during the welding process, only the movable base needs to be replaced, shortening the working time and greatly improving the welding efficiency of the laser welding machine.

[0003] The above-mentioned applications still have shortcomings:

[0004] The welding fixture used in this type of laser welding machine has a limited clamping range for the workpiece. It uses a cylinder to push the pressure plate to clamp the workpiece, but it can only clamp and fix workpieces of corresponding shapes, such as plates. It has certain limitations when clamping multi-sided irregular workpieces such as pipes with a certain curvature, and it is difficult to meet the precise welding needs of different types of workpieces.

[0005] To address this issue, a welding fixture for a laser welding machine was designed. Summary of the Invention

[0006] The main objective of this invention is to provide a welding fixture for a laser welding machine to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] A welding fixture for a laser welding machine includes a base frame, with L-shaped plates symmetrically mounted on the top of the base frame. A drive mechanism is provided between the base frame and the L-shaped plates. A bidirectional lead screw rotates at the middle position on one side of the L-shaped plates. A fixing frame is symmetrically threaded on the outer side of the bidirectional lead screw. A through-hole is symmetrically opened on the adjacent side of the fixing frame. A clamping block is hinged to the inner wall of each through-hole. A screw rotates on the other side of the fixing frame. A top plate is threaded on the outer side of the screw. A stop bar is evenly arranged at the bottom of the top plate, and the bottom end of the stop bar penetrates and extends into the interior of the through-hole. The bottom end of the stop bar is slidably connected to the top of the clamping block. A limit member is provided at the bottom of the stop bar.

[0009] Preferably, the top and bottom of the fixed frame near the L-shaped plate are symmetrically provided with limiting holes, and limiting rods are slidably installed inside the limiting holes, with the bottom end of the limiting rods fixedly connected to the top of the bottom frame.

[0010] Preferably, the limiting component includes a mounting shell and a rotating wheel. The mounting shell is located at the bottom end of the stop rod, and the rotating wheel is rotatably mounted inside the mounting shell.

[0011] Preferably, the drive mechanism includes a fixed lead screw and a sliding hole. The fixed lead screw is rotatably mounted inside the bottom frame through a transverse path. A movable block is symmetrically threaded on the outer side of the fixed lead screw, and the top of the movable block is fixedly connected to the bottom of the L-shaped plate. The sliding hole is opened at the top of the bottom frame, and the inside of the sliding hole is slidably connected to the outer side of the top of the movable block.

[0012] Preferably, a ladder block is installed in the middle of the fixed frame, and springs are evenly arranged on both sides of the ladder block. One end of each spring is fixedly connected to one side of the clamping block. The clamping blocks are all L-shaped blocks, and one end of each clamping block is equipped with an anti-slip block.

[0013] Preferably, the fixed frame has through holes of the same size as the abutment evenly distributed on the side away from the opening, and the through holes are slidably connected to the abutment. The outside of the fixed frame is provided with an anti-slip pad.

[0014] Preferably, the ends of the screws are provided with a handle, and the outer side of the handle is provided with an anti-slip layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the combined use of a base frame, L-shaped plate, bidirectional lead screw, top plate, fixed frame, through-hole, clamping block, ladder block, spring, screw, top plate and stop rod, can quickly switch tooling according to different workpiece shapes. The adjustable clamping block position realizes efficient and stable clamping of round or plate-shaped workpieces, thereby meeting diverse welding needs and improving versatility and welding efficiency.

[0017] 2. This utility model uses the combination of limiting holes and limiting rods, and drives the fixed frame to move through a bidirectional lead screw. The fixed frame slides and is limited by the limiting holes along the outside of the limiting rods, which effectively ensures the accuracy and stability of the fixed frame movement, ensures the accurate clamping position of the workpiece, and improves the welding positioning accuracy and operational reliability. Attached Figure Description

[0018] Figure 1 This is a front sectional view of the present invention;

[0019] Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a schematic diagram showing the connection between the fixed frame and the ladder block of this utility model;

[0021] Figure 4 This is a bottom view of the fixed frame of this utility model.

[0022] In the diagram: 1. Base frame; 2. L-shaped plate; 3. Drive mechanism; 301. Fixed lead screw; 302. Movable block; 303. Sliding hole; 4. Bidirectional lead screw; 5. Limiting rod; 6. Fixed frame; 7. Through port; 8. Clamping block; 9. Ladder block; 10. Spring; 11. Screw; 12. Top plate; 13. Support rod; 14. Limiting component; 1401. Mounting shell; 1402. Rotary wheel; 15. Limiting hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Example 1

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment proposes a welding fixture for a laser welding machine, including a base frame 1. An L-shaped plate 2 is symmetrically installed on the top of the base frame 1. The L-shaped plate 2 is made of high-quality carbon structural steel No. 45. After quenching and tempering, the hardness reaches HRC28-32, the tensile strength is not less than 600MPa, and the yield strength is not less than 355MPa, ensuring that it is not easily deformed when subjected to large clamping force and the force of the driving mechanism 3. A driving mechanism 3 is provided between the base frame 1 and the L-shaped plate 2.

[0029] A bidirectional lead screw 4 is rotatably mounted in the middle of one side of the L-shaped plate 2. A fixed frame 6 is installed on the outer side of the bidirectional lead screw 4 with symmetrical upper and lower threads. The tolerance of the internal thread fit between the bidirectional lead screw 4 and the fixed frame 6 is H7 / g6. The bidirectional lead screw 4 is a T8 grade trapezoidal threaded lead screw, made of 40Cr alloy structural steel. After quenching and tempering treatment, the surface hardness reaches HRC45-50. Its thread accuracy grade is 7H and the pitch is 4mm, which ensures high-precision transmission and wear resistance of the lead screw during rotation, while also being able to withstand large axial forces to meet the driving requirements of the fixed frame 6.

[0030] On the side of the fixed frame 6, there are symmetrical openings 7, and the inner sidewalls of the openings 7 are all hinged with clamping blocks 8.

[0031] On the other side of the fixed frame 6, there are screws 11 rotating. A top plate 12 is threaded on the outer side of the screws 11. Abutments 13 are evenly arranged at the bottom of the top plate 12. The bottom end of the abutments 13 passes through and extends into the interior of the opening 7. The bottom end of the abutments 13 is slidably connected to the top of the clamping block 8. A limiter 14 is provided at the bottom of the abutments 13.

[0032] When the workpiece to be clamped is cylindrical, the screw 11 is rotated, and the screw 11 drives the top plate 12 and the abutment 13 to move toward the clamping block 8. The abutment 13 pushes the clamping block 8 to rotate around one end of the clamping block 8, so that the end of the clamping block 8 pushes out of the outside of the fixed frame 6. The double-acting screw 4 is rotated to drive the fixed frame 6 and the clamping block 8 to move closer to the workpiece and fit against different surfaces of the circular workpiece to clamp it. When the workpiece to be welded is plate-shaped, the screw 11 is rotated in the opposite direction to drive the top plate 12 and the abutment 13 away from the clamping block 8. The plate workpiece is then placed between the fixed frames 6. The double-acting screw 4 is rotated to drive the fixed frame 6 to move toward the workpiece, so that the fixed frame 6 clamps the plate workpiece. At the same time, the clamping block 8 is hidden inside the opening 7 under the pressure of the workpiece. Example 2

[0033] The solution in Example 1 will be further described below with reference to its specific working method.

[0034] like Figure 1 , Figure 2 and Figure 4As shown, in a preferred embodiment, based on the above method, the top and bottom of the fixed frame 6 near the L-shaped plate 2 are symmetrically provided with limiting holes 15, and the limiting rods 5 are slidably installed inside the limiting holes 15, and the bottom end of the limiting rods 5 is fixedly connected to the top of the bottom frame 1.

[0035] When the bidirectional lead screw 4 rotates, it drives the fixed frame 6 to move towards the workpiece in the middle position. The fixed frame 6 slides along the outside of the limiting rod 5 through the limiting hole 15, which limits the up and down sliding of the fixed frame 6, making the movement of the fixed frame 6 more precise and stable.

[0036] like Figure 1 As shown, in a preferred embodiment, based on the above method, the limiting member 14 further includes a mounting shell 1401 and a rotating wheel 1402. The mounting shell 1401 is located at the bottom end of the abutment rod 13. The mounting shell 1401 is fixed to the bottom end of the abutment rod 13 by a threaded connection. The tightening torque is 8-10 N·m to ensure the firmness of the installation. The bottom end of the abutment rod 13 penetrates and extends into the interior of the through-hole 7. The bottom end of the abutment rod 13 is slidably connected to the top of the clamping block 8. The rotating wheel 1402 is rotatably mounted inside the mounting shell 1401.

[0037] The working principle of the limiting member 14 is as follows: when the abutment rod 13 passively pushes the clamping block 8 to rotate, the rotating wheel 1402 contacts and rolls with the top of the clamping block 8. Its rolling friction is small, which can effectively reduce the wear between the abutment rod 13 and the clamping block 8. At the same time, the mounting shell 1401 limits the axial and radial of the rotating wheel 1402 to ensure that the force transmission of the abutment rod 13 is accurate during the pushing process, prevent the rotating wheel 1402 from disengaging or deviating, and ensure that the clamping block 8 rotates according to the predetermined trajectory.

[0038] The bottom of the stop rod 13 is equipped with a rotatable wheel 1402. When it moves downward, it pushes the clamping block 8 to rotate. The wheel 1402 makes rolling contact with the top of the clamping block 8, which effectively reduces friction and makes the rotation of the clamping block 8 smoother and more flexible. At the same time, it avoids hard friction from causing wear to the parts and extends the service life.

[0039] like Figure 1As shown, in a preferred embodiment, based on the above method, the drive mechanism 3 further includes a fixed lead screw 301 and a sliding hole 303. The fixed lead screw 301 is rotatably installed inside the bottom frame 1 through the transverse direction and is located in the center of the bottom frame 1 in the transverse direction. One end of the fixed lead screw 301 extends out of the outer side of the bottom frame 1 and is fixedly installed with a hexagonal drive head or drive motor. The operator can use a hexagonal wrench to rotate or start the drive motor to drive the fixed lead screw 301 to rotate. A movable block 302 is symmetrically threaded on the outer side of the fixed lead screw 301, and the top of the movable block 302 is fixedly connected to the bottom of the L-shaped plate 2. The sliding hole 303 is opened at the top of the bottom frame 1, and the interior of the sliding hole 303 is slidably connected to the outer side of the top of the movable block 302.

[0040] Rotate the fixed lead screw 301, and the movable block 302 moves on the fixed lead screw 301 and drives the L-shaped plate 2 to move horizontally through the sliding hole 303, causing the two sets of L-shaped plates 2 to move closer to each other and bring the workpiece into contact at the welding position.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, a step block 9 is further installed in the middle position inside the fixed frame 6. Springs 10 are evenly arranged on both sides of the step block 9, and one end of the spring 10 is fixedly connected to one side of the clamping block 8. The spring 10 is a cylindrical spring made of 65Mn spring steel. The clamping blocks 8 are all set as L-shaped blocks, and one end of the clamping blocks 8 is provided with an anti-slip block.

[0042] When clamping plate-shaped or block-shaped workpieces, rotating the screw 11 causes the top plate 12 and the abutment 13 to move away from the clamping block 8. Under the elastic force of the spring 10, the spring 10 contracts and pulls the clamping block 8 to rotate into the through-hole 7, so that the clamping block 8 is hidden inside the through-hole 7. Then, rotating the bidirectional lead screw 4 moves closer to each other through the fixed frame 6 to clamp the plate-shaped or block-shaped workpiece. The anti-slip block at one end of the L-shaped clamping block 8 can increase the friction with the workpiece surface. The anti-slip block is made of nitrile rubber with a Shore hardness of 70A. When clamping round workpieces, the L-shaped structure can better fit the outer side of the workpiece, providing stable clamping force with multi-point contact, effectively preventing the workpiece from sliding or rotating during welding and ensuring welding accuracy.

[0043] like Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the fixed frame 6 is further provided with through holes of the same size as the abutment rod 13 on the side away from the through opening 7, and the through holes are slidably connected to the abutment rod 13. An anti-slip pad is provided on the outer side of the fixed frame 6.

[0044] The through hole on the fixed frame 6 is slidably connected to the push rod 13, which provides guidance for the push rod 13 when it moves vertically, making the push rod 13 more stable when it moves with the top plate 12, avoiding tilting or shaking, thereby ensuring that the push rod 13 can accurately push the clamping block 8 to rotate and improve the motion accuracy of the tooling.

[0045] like Figure 1 As shown, in a preferred embodiment, based on the above method, each end of the screw 11 is provided with a handle, and the outer side of the handle is provided with an anti-slip layer.

[0046] The anti-slip layer increases the friction between the hand and the handle, making operation easier and less prone to slipping, and improving the convenience and efficiency of tooling adjustment. Example 3

[0047] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0048] When the workpiece to be clamped is cylindrical, the screw 11 is rotated, causing the top plate 12 and the abutment 13 to move towards the clamping block 8. The abutment 13 pushes the clamping block 8 to rotate around one end of the clamping block 8, causing the end of the clamping block 8 to push out of the outside of the fixing frame 6. The bidirectional lead screw 4 is rotated, and under the limitation of the limiting hole 15 and the limiting rod 5, the bidirectional lead screw 4 rotates, causing the fixing frame 6 and the clamping block 8 to move closer to the workpiece, so that the fixing frame 6 and the clamping block 8 respectively fit against different surfaces of the circular workpiece to clamp it. When the workpiece to be welded is plate-shaped, the screw 11 is rotated in the opposite direction, causing the top plate 12 and the abutment 13 to move towards the clamping block 8. Rod 13 moves away from clamping block 8 and, under the contraction force of spring 10, pulls clamping block 8 to rotate into the through opening 7, so that clamping block 8 is hidden inside the through opening 7. Then, the plate workpiece is placed between the fixed frames 6. Rotating the bidirectional lead screw 4 drives the fixed frame 6 to move towards the workpiece, so that the fixed frame 6 clamps the plate workpiece. Rotating the fixed lead screw 301, the movable block 302 moves on the fixed lead screw 301 and drives the L-shaped plate 2 to move horizontally through the sliding hole 303, so that the two sets of L-shaped plates 2 move closer to each other, so that the workpiece clamped on the L-shaped plate 2 contacts the position to be welded, and then laser welding is performed.

[0049] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A welding fixture for a laser welding machine, comprising a base frame (1), characterized in that: An L-shaped plate (2) is symmetrically installed on the top of the bottom frame (1). A drive mechanism (3) is provided between the bottom frame (1) and the L-shaped plate (2). A two-way screw (4) rotates in the middle of one side of the L-shaped plate (2). A fixed frame (6) is symmetrically installed on the outer side of the two-way screw (4). A through-hole (7) is symmetrically opened on the side of the fixed frame (6). A clamp (8) is hinged to the inner wall of the through-hole (7). A screw (11) rotates on the other side of the fixed frame (6). A top plate (12) is installed on the outer side of the screw (11). A push rod (13) is evenly provided at the bottom of the top plate (12). The bottom end of the push rod (13) penetrates and extends into the inside of the through-hole (7). The bottom end of the push rod (13) is slidably connected to the top of the clamp (8). A limit piece (14) is provided at the bottom of the push rod (13).

2. The welding fixture for a laser welding machine according to claim 1, characterized in that: The top and bottom of the fixed frame (6) near the L-shaped plate (2) are symmetrically provided with limiting holes (15). Limiting rods (5) are slidably installed inside the limiting holes (15), and the bottom end of the limiting rods (5) is fixedly connected to the top of the bottom frame (1).

3. The welding fixture for a laser welding machine according to claim 1, characterized in that: The limiting member (14) includes a mounting shell (1401) and a rotating wheel (1402). The mounting shell (1401) is located at the bottom end of the abutment (13), and the rotating wheel (1402) is rotatably mounted inside the mounting shell (1401).

4. The welding fixture for a laser welding machine according to claim 1, characterized in that: The drive mechanism (3) includes a fixed lead screw (301) and a sliding hole (303). The fixed lead screw (301) is rotatably mounted inside the bottom frame (1) through a transverse path. A movable block (302) is symmetrically threaded on the outer side of the fixed lead screw (301), and the top of the movable block (302) is fixedly connected to the bottom of the L-shaped plate (2). The sliding hole (303) is opened on the top of the bottom frame (1), and the interior of the sliding hole (303) is slidably connected to the outer side of the top of the movable block (302).

5. The welding fixture for a laser welding machine according to claim 1, characterized in that: A ladder block (9) is installed in the middle of the fixed frame (6). Springs (10) are evenly arranged on both sides of the ladder block (9), and one end of the spring (10) is fixedly connected to one side of the clamping block (8). The clamping blocks (8) are all L-shaped blocks, and one end of the clamping blocks (8) is provided with an anti-slip block.

6. The welding fixture for a laser welding machine according to claim 1, characterized in that: The fixed frame (6) is provided with through holes of the same size as the abutment (13) on the side away from the opening (7), and the through holes are slidably connected to the abutment (13). Anti-slip pads are provided on the outside of the fixed frame (6).

7. The welding fixture for a laser welding machine according to claim 1, characterized in that: The ends of the screw (11) are all provided with a handle, and the outside of the handle is provided with an anti-slip layer.

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