Auxiliary structure for friction stir welding equipment

Abstract

The utility model discloses an auxiliary structure for friction stir welding equipment, which relates to the technical field of welding processing, and comprises a pinch roller mechanism used for pressing on a workpiece to be welded, the pinch roller mechanism comprises a bearing support arranged on a spindle box and a transfer frame movably arranged on the bearing support along the vertical direction, a horizontally-arranged driving source is arranged on the bearing support, the execution end of the driving source is fixedly connected with a follow-up block, and the follow-up block can be driven by the driving source to move horizontally. The follow-up block and the transfer frame are arranged to be in wedge fit, so that the drive source is arranged to be in the horizontal direction while the transfer frame and the pressing wheel vertically move downwards through the drive source, namely, the whole pressing wheel mechanism is arranged to be in the L shape, and compared with an existing three-dimensional longitudinal layout, the whole pressing wheel mechanism is arranged to be in the L shape. The L-shaped layout occupies a small longitudinal space, does not hinder the trend layout of a gas path and a cable on the friction stir welding equipment, and is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of welding processing technology, specifically to an auxiliary structure for friction stir welding equipment. Background Technology

[0002] In the friction stir welding process, the high-speed rotation of the stirring head causes friction between the head and the workpiece materials, raising the temperature at the joint. This causes the material to soften plastically as the temperature rises, and the stirring head is then moved along the welding path by the spindle to complete the welding. To ensure relative stability between the two workpiece materials during the stirring head's movement, a pressure roller is typically mounted on the spindle at the front of the moving head. This pressure roller continuously presses against the workpiece materials throughout the head's movement, ensuring optimal weld formation and quality.

[0003] For example, patent application CN114012245A discloses a pressure roller leveling device for friction stir welding. This leveling device is installed on a friction stir welding equipment, which includes a main shaft and a stirring head connected to the front end of the main shaft. The pressure roller leveling device includes a bracket detachably connected to the main shaft, a thin cylinder mounted on the bracket, and a pressure roller plate connected to the movable end of the thin cylinder. A guide rail is connected below the bracket, and the guide rail is arranged along the movable direction of the thin cylinder. A connecting member is fixedly connected to the pressure roller plate, and the pressure roller plate moves along the guide rail and the movable direction of the thin cylinder via the connecting member. The front end of the pressure roller plate extends to the side of the stirring head. Symmetrical shaft holes are opened at the front end of the pressure roller plate, and roller shafts are inserted into the shaft holes. Bearings are sleeved on the roller shafts, and the bearings are used to roll-level the front end of the welding position.

[0004] However, when the above-mentioned leveling device is in use, the bearing (equivalent to the pressure roller mentioned above) is driven by a cylinder set in the vertical direction. The whole assembly consisting of the bearing and the cylinder is arranged in the vertical direction, which makes the longitudinal space occupied by the bearing and the cylinder large. This is not convenient for the installation layout of the air circuit and other components on the friction stir welding equipment. Furthermore, the bearing moves up and down along the guide rail under the control of the cylinder. The setting of this bearing movement direction further occupies a lot of longitudinal space, which means that the layout of the air circuit and cables must completely avoid the movement path of the bearing and leave a certain safety distance.

[0005] Based on the problems mentioned above, we propose an auxiliary structure for friction stir welding equipment. Utility Model Content

[0006] The purpose of this invention is to solve the problems in the prior art by proposing an auxiliary structure for friction stir welding equipment. In this auxiliary structure, the pressure roller and the drive source are arranged in an L-shape, so that the whole assembly occupies less longitudinal space, which facilitates the air circuit installation design on the friction stir welding equipment. Compared with the longitudinal assembly composed of bearings and cylinders in the prior art, this invention has the advantages of small longitudinal space occupation and convenient use.

[0007] To solve the above problems, this utility model provides the following technical solution:

[0008] An auxiliary structure for a friction stir welding equipment includes a pressure roller mechanism for pressing on a workpiece to be welded. The pressure roller mechanism includes a support bracket mounted on a spindle box and a transfer frame movably mounted on the support bracket in a vertical direction. A horizontally arranged drive source is mounted on the support bracket, and a follower block is fixedly connected to the actuating end of the drive source. The follower block can be driven by the drive source to move horizontally, and the bottom of the follower block and the top of the transfer frame form a wedge engagement. A pressure roller for pressing the workpiece to be welded is rotatably mounted on the bottom of the transfer frame.

[0009] As a further embodiment of this utility model: the pressure roller mechanism further includes a limiting block that is movably disposed on the bearing bracket in the vertical direction, and the bottom of the limiting block abuts against the top of the follower block, so that the follower block is subjected to a vertical downward pressing force applied by the limiting block.

[0010] As a further embodiment of this utility model: a guide post is provided at the top of the support bracket, and a limiting block is movably disposed on the guide post in the vertical direction. An elastic element is provided on the guide post, and the elastic element is used to drive the limiting block to have a tendency to move toward the follower block.

[0011] As a further embodiment of this utility model: the bottom of the limiting block and the top of the follower block form a wedge fit.

[0012] As a further embodiment of this utility model: the top and bottom of the follower block are provided with inclined wedge surfaces, and the two inclined wedge surfaces are arranged in a figure-eight shape, so that when the follower block moves in the horizontal direction, the limiting block and the adapter have a tendency to move close to or away from each other.

[0013] As a further embodiment of this utility model: the elastic element includes a first reset spring sleeved on the guide post, and the two ends of the first reset spring are fixedly connected to the guide post and the limiting block, respectively.

[0014] As a further embodiment of this utility model: the supporting bracket is provided with a second return spring that is fixedly connected to the adapter frame. The second return spring is used to make the adapter frame have a tendency to move vertically upward.

[0015] As a further embodiment of this utility model: the driving source is a cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0016] As a further embodiment of this utility model, the auxiliary structure also includes a scale mark set at the bottom of the spindle box and an indicator plate set on the spindle, with the indicator plate pointing to the scale mark so as to indicate the tilt angle of the spindle through the scale indicated by the indicator plate.

[0017] As a further embodiment of this utility model: one end of the indicator is provided with a waist-shaped groove for exposing the scale markings, and the upper and lower relative positions of the waist-shaped groove are provided with indicator arrows for pointing to the scale markings.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting the follower block and the adapter frame as a wedge fit, the adapter frame and the pressure roller can be moved vertically downward by the drive source, while the drive source is set horizontally. That is, the pressure roller mechanism as a whole forms an L-shaped layout. Compared with the existing three-dimensional longitudinal layout, the L-shaped layout of this utility model occupies less longitudinal space and will not obstruct the air passage and cable routing of the friction stir welding equipment, making it convenient to use.

[0020] 2. By setting the limit block, on the basis of setting the follower block and the adapter frame as a wedge fit, the limit block can apply a vertical downward force to the follower block, so that the follower block is subjected to a balanced force in the vertical direction, reducing the damage to the drive source caused by the offset of the follower block.

[0021] 3. By forming a wedge fit between the bottom of the limiting block and the top of the follower block, the contact stability and self-locking performance between the two can be improved by relying on the wedge fit characteristics.

[0022] 4. By setting the second return spring, the second return spring is used to make the adapter frame have a tendency to move vertically upward. Then, when the follower block moves to the left to release the downward pressure on the adapter frame, the second return spring can drive the adapter frame to move upward, so as to achieve the constant contact between the top of the adapter frame and the bottom of the follower block, which facilitates the subsequent auxiliary work.

[0023] 5. By setting the scale markings, the scale indicated by the indicator arrow can be used to indicate the size of the spindle rotation angle during the spindle tilt adjustment process, allowing for dynamic adjustment without the need for external tools, making adjustment convenient. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a front view structural diagram of the present invention;

[0026] Figure 2 This is a front view schematic diagram of the pressure roller mechanism in this utility model;

[0027] Figure 3 yes Figure 1 A magnified structural diagram of point A in the middle.

[0028] In the diagram: 1. Pressure roller mechanism; 101. Bearing bracket; 102. Adapter frame; 103. Pressure roller; 104. Drive source; 105. Follower block; 2. Limit block; 3. Guide column; 4. Elastic element; 5. Scale marking; 6. Indicator plate; 7. Indicator arrow; a. Spindle box; b. Spindle. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Existing friction stir welding equipment includes a spindle box a and a spindle b located at the bottom of the spindle box a. The auxiliary structure described in this paper is installed on the spindle box a and works in conjunction with the spindle b to perform welding auxiliary work.

[0031] Example 1:

[0032] like Figures 1-2 As shown, an auxiliary structure for a friction stir welding equipment includes a pressure roller mechanism 1. The pressure roller mechanism 1 includes a support bracket 101 mounted on the spindle box a. Specifically, Figure 2 The diagram shows a support bracket 101 positioned at the bottom of the spindle box a. A transition frame 102 is movably mounted on the support bracket 101, and the transition frame 102 is restricted to vertical movement only. The top of the transition frame 102 is an inclined surface, and a pressure roller 103 is rotatably mounted at the bottom of the transition frame 102. The pressure roller 103 is covered with a rubber pad and is used to press the workpiece to be welded during the welding process. The rotation axis of the pressure roller 103 is perpendicular to the welding direction of the stirring head on the spindle b. A horizontally arranged drive source 104 is also mounted on the support bracket 101. A follower block 105 is fixedly mounted at the execution end of the drive source 104. The follower block 105 can be driven by the drive source 104 to move horizontally. At the same time, the bottom of the follower block 105 is a wedge surface, which is in a wedge fit relationship with the inclined surface at the top of the transition frame 102.

[0033] It should be noted that the wedge-shaped fit between the wedge surface and the inclined surface can be arranged in various forms on the bearing support 101, as long as the horizontal movement of the follower block 105 can be driven by the wedge fit to move the adapter 102 downward in the vertical direction. Figure 2 The state shown illustrates one scenario of a wedge fit between a wedge surface and an inclined surface. This scenario will be used as an example for explanation. Figure 2 In the indicated state, the pressure roller 103 can be pressed against the workpiece to be welded, and then the drive source 104 drives the follower block 105 to move to the right. In turn, the wedge engagement between the follower block 105 and the adapter frame 102 can drive the adapter frame 102 to move downward, so that the pressure roller 103 presses against the workpiece to be welded. By maintaining this pressing action, the pressure roller 103 can always apply a downward force to the workpiece to be welded during the welding process, thus ensuring the weld formation effect and weld quality.

[0034] This paper utilizes this wedge-fitting method to drive the pressure roller 103 downward to press against the workpiece to be welded, so that the drive source 104 is not arranged longitudinally as in the prior art, but horizontally. This horizontal arrangement can reduce the longitudinal space occupied by the pressure roller 103 and the drive source 104 as a whole, and facilitate better design of the air circuit and cables on the friction stir welding equipment.

[0035] exist Figure 2 In the state shown, after welding is completed, the follower block 105 is driven to the left until the follower block 105 releases its downward pressing action on the adapter frame 102. At this time, the adapter frame 102 and the pressure roller 103 are in a free-moving state. In order to ensure that the inclined surface at the top of the adapter frame 102 is always in contact with the inclined wedge surface at the bottom of the follower block 105, so as to facilitate subsequent auxiliary work, a second return spring (not shown in the figure) fixedly connected to the adapter frame 102 can be provided on the support bracket 101. The second return spring is used to make the adapter frame 102 have a tendency to move vertically upward. Then, during the process of the follower block 105 moving to the left to release the downward pressing action on the adapter frame 102, the second return spring can drive the adapter frame 102 to move upward, so as to achieve the constant contact between the top of the adapter frame 102 and the bottom of the follower block 105.

[0036] In this embodiment, the drive source 104 can be a cylinder, a hydraulic cylinder, or an electric telescopic rod, as long as it can satisfy the reciprocating motion of the follower block 105 in the horizontal direction.

[0037] Example 2:

[0038] In Embodiment 1, when the follower block 105 and the adapter frame 102 rely on a wedge engagement to press down on the pressure roller 103, the force analysis of the follower block 105 is as follows: it is subjected to a horizontal rightward pulling force from the drive source 104, a vertical upward pushing force from the adapter frame 102, and an oblique friction force generated during the wedge engagement. Considering this combined force, the follower block 105 will always be subjected to a vertical upward pushing force. Taking a cylinder as an example, over a long period, the entire assembly of the follower block 105 and the cylinder piston rod will be subjected to an upward pushing force. This force is perpendicular to the horizontal movement direction of the piston rod, which will damage the piston and seals on the inner wall of the cylinder. This embodiment is based on this and improves upon Embodiment 1, as follows:

[0039] Based on the pressure roller mechanism 1 in Embodiment 1, the pressure roller mechanism 1 further includes a limiting block 2 that is movably disposed on the support bracket 101 in the vertical direction, and the bottom of the limiting block 2 abuts against the top of the follower block 105, so that the follower block 105 is subjected to a vertical downward pressing force applied by the limiting block 2. The vertical downward pressing force applied by the limiting block 2 on the follower block 105 is used to counteract the vertical upward pushing force previously received by the follower block 105, thereby protecting the cylinder connected to the follower block 105.

[0040] Specifically, in order to achieve a downward pressing force on the follower block 105 by the limiting block 2, this embodiment provides a guide post 3 at the top of the support bracket 101, and the limiting block 2 is movably mounted on the guide post 3 along the vertical direction, that is, the installation of the limiting block 2 is achieved by relying on the guide post 3. At the same time, an elastic element 4 is provided on the guide post 3, and the elastic element 4 is used to drive the limiting block 2 to have a tendency to move towards the follower block 105. Preferably, the elastic element 4 includes a first return spring sleeved on the guide post 3, and the two ends of the first return spring are fixedly connected to the guide post 3 and the limiting block 2 respectively. The first return spring is always in a compressed state, and thus the first return spring will always apply a downward pressing force on the limiting block 2.

[0041] Of course, this article uses the elastic element 4 as an example to illustrate the way that the limiting block 2 is subjected to vertical downward pressure. In actual use, it is not limited to the way of the elastic element 4. It can be any component that makes the limiting block 2 have a tendency to move vertically downward.

[0042] Example 3:

[0043] In the configuration of Embodiment 2, the limiting block 2 and the follower block 105 are in a contacting relationship. To improve the contact stability and self-locking performance, this embodiment sets the bottom of the limiting block 2 and the top of the follower block 105 to form a wedge fit. That is, a wedge surface is also provided on the top of the follower block 105, and an inclined surface is also provided on the bottom of the limiting block 2. The wedge surface and the inclined surface are in a wedge fit relationship. Preferably, the wedge surfaces at the top and bottom of the follower block 105 are arranged in a figure-eight shape. Figure 2 As you can see, the figure-eight shape is identical to the cross-section of a trumpet. Figure 2 When the follower block 105 moves to the right in the state shown, the limit block 2 and the adapter 102 will move away from each other.

[0044] Example 4:

[0045] like Figure 3 As shown, during the use of the friction stir welding equipment, the spindle b on its spindle box a needs to be adjusted in angle according to the actual welding work. In order to quickly adjust the spindle b to the required tilt angle without the need for external tools, this embodiment makes the following improvements based on any of the above embodiments, specifically:

[0046] The auxiliary structure of this utility model also includes a scale mark 5 set at the bottom of the spindle box a and an indicator plate 6 set on the spindle b. The spindle b can rotate a certain angle on the spindle box a. Under normal circumstances, the indicator plate 6 points to the scale mark 5. After driving the spindle b to rotate the corresponding tilt angle, the scale indicated by the indicator plate 6 indicates the size of the tilt angle of the spindle b. The spindle b can be adjusted to the corresponding tilt angle without the aid of external tools, and the adjustment is simple.

[0047] Furthermore, in order to facilitate staff to better read the values ​​of the scale mark 5 indicated by the indicator 6, a waist-shaped groove is provided at one end of the indicator 6 to expose the scale mark 5, and an indicator arrow 7 is provided at the upper and lower relative positions of the waist-shaped groove to point to the scale mark 5.

[0048] It should be noted that the scale marking 5 in this embodiment is a conventional technical means in the prior art. This article takes a vernier caliper as an example for explanation. For example, the scale marking 5 is composed of the main scale and vernier scale, which are equivalent to those on the vernier caliper. The two indicator arrows 7 point to the main scale and vernier scale respectively, and the reading method is the same as the reading method of the vernier caliper.

[0049] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An auxiliary structure for a friction stir welding equipment, characterized in that, The device includes a pressure roller mechanism (1) for pressing on the workpiece to be welded. The pressure roller mechanism (1) includes a support bracket (101) mounted on the spindle box (a) and a transfer frame (102) movably mounted on the support bracket (101) in the vertical direction. A horizontally arranged drive source (104) is mounted on the support bracket (101), and a follower block (105) is fixedly connected to the execution end of the drive source (104). The follower block (105) can be driven by the drive source (104) to move horizontally, and the bottom of the follower block (105) and the top of the transfer frame (102) form a wedge fit. The bottom of the transfer frame (102) is rotatably provided with a pressure roller (103) for pressing the workpiece to be welded.

2. The auxiliary structure for a friction stir welding equipment according to claim 1, characterized in that, The pressure roller mechanism (1) further includes a limiting block (2) that is movably disposed on the bearing bracket (101) in the vertical direction, and the bottom of the limiting block (2) abuts against the top of the follower block (105) so that the follower block (105) is subjected to a vertical downward pressing force applied by the limiting block (2).

3. The auxiliary structure for a friction stir welding equipment according to claim 2, characterized in that, The top of the support bracket (101) is provided with a guide post (3), and the limiting block (2) is movably disposed on the guide post (3) in the vertical direction. The guide post (3) is provided with an elastic element (4), and the elastic element (4) is used to drive the limiting block (2) to have a tendency to move towards the follower block (105).

4. An auxiliary structure for a friction stir welding apparatus according to claim 2 or 3, characterized in that, The bottom of the limiting block (2) and the top of the follower block (105) form a wedge fit.

5. An auxiliary structure for a friction stir welding equipment according to claim 4, characterized in that, The follower block (105) is provided with inclined wedge surfaces at the top and bottom, and the two inclined wedge surfaces are arranged in a figure-eight shape so that when the follower block (105) moves in the horizontal direction, the limiting block (2) and the adapter (102) have a tendency to move close to or away from each other.

6. An auxiliary structure for a friction stir welding equipment according to claim 3, characterized in that, The elastic element (4) includes a first reset spring sleeved on the guide post (3), and the two ends of the first reset spring are fixedly connected to the guide post (3) and the limiting block (2) respectively.

7. An auxiliary structure for a friction stir welding apparatus according to any one of claims 1-3, characterized in that, The support bracket (101) is provided with a second return spring that is fixedly connected to the adapter (102). The second return spring is used to make the adapter (102) have a tendency to move vertically upward.

8. An auxiliary structure for a friction stir welding apparatus according to any one of claims 1-3, characterized in that, The drive source (104) is a cylinder, a hydraulic cylinder, or an electric telescopic rod.

9. An auxiliary structure for a friction stir welding apparatus according to any one of claims 1-3, characterized in that, The auxiliary structure also includes a scale mark (5) set at the bottom of the spindle box (a) and an indicator plate (6) set on the spindle (b), with the indicator plate (6) pointing to the scale mark (5) so as to indicate the tilt angle of the spindle (b) by the scale indicated by the indicator plate (6).

10. An auxiliary structure for a friction stir welding apparatus according to claim 9, characterized in that, The indicator (6) has a waist-shaped groove at one end for exposing the scale mark (5), and there are pointing arrows (7) at the upper and lower relative positions of the waist-shaped groove for pointing to the scale mark (5).

Images