A tool holder for friction stir welding

Abstract

The utility model relates to the field of friction stir welding, and specifically to a tool holder for friction stir welding. The tool holder is provided with a U-shaped groove for horizontal insertion of a welding tool, and a positioning platform for supporting the welding tool; the tool holder is provided with a positioning key for plugging and cooperating with the welding tool; a linear push rod capable of generating a linear telescopic action in the horizontal direction is installed on the tool holder, and the linear push rod abuts against the welding tool in an extended state, thereby clamping the welding tool to prevent the welding tool from exiting the U-shaped groove. The utility model greatly improves the stability of the welding tool clamping and avoids the position displacement of the welding tool.

Description

Technical Field

[0001] The utility model relates to the field of friction stir welding, in particular to a tool holder seat used for friction stir welding. Background Art

[0002] During the welding process of the friction stir welding equipment, the welding tool needs to be replaced to ensure the continuous progress of the welding work. The existing automatic tool change magazine for friction stir welding, as described in the patent number "CN202211716600.9", includes a tool magazine part and a tool moving part. The tool magazine part is provided with multiple tool positions, one of which is in an empty state, and the other tool positions are provided with tool change assemblies for replacement. The tool moving part includes a mixer head and a tool clamping structure. After the tool moving part moves to the corresponding tool position, it automatically positions and replaces and installs the tool change assembly through the tool clamping structure. This tool change method is to install a cylinder radially along the turntable of the tool magazine, and drive the positioning pin to plug and match the welding tool through the expansion and contraction of the cylinder to achieve the anti-rotation positioning of the welding tool; but in this positioning method, during the rotation of the turntable, the welding tool is very easy to shake under the action of centrifugal force, thereby separating from the positioning pin, causing the welding tool to shift in position, affecting the next tool change, so it is urgent to solve. Utility Model Content

[0003] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a tool holder for stir friction welding. The utility model greatly improves the stability of the welding tool clamping and avoids the position deviation of the welding tool.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A tool holder for friction stir welding, the tool holder is provided with a U-shaped groove for horizontal insertion of a welding tool, and a positioning platform for supporting the welding tool; a positioning key for plugging and cooperating with the welding tool is arranged on the tool holder; a linear push rod capable of generating a linear telescopic action in a horizontal direction is installed on the tool holder, and the linear push rod abuts against the welding tool in an extended state, thereby clamping the welding tool to prevent the welding tool from exiting the U-shaped groove.

[0006] As a further solution of the utility model: a guide groove is opened along the circumferential direction of the outer ring of the welding tool, the linear push rod and the guide groove of the welding tool are located at the same height, the arc radius of the U-shaped groove corresponds to the radius of the guide groove; taking the opening direction of the U-shaped groove as the first direction, along the first direction, the distance between the abutment point between the linear push rod and the guide groove and the bottom surface of the U-shaped groove is greater than the radius of the guide groove.

[0007] As a further solution of the utility model: a locking seat is also installed on the tool holder seat, a sliding groove is horizontally opened in the locking seat along the vertical U-shaped groove opening direction, and the linear push rod is coaxially installed in the sliding groove and slidably cooperates with the sliding groove.

[0008] As a further solution of the utility model: a positioning ball head is provided at the rod end of the linear push rod, and the linear push rod abuts against the guide groove of the welding tool through the positioning ball head.

[0009] As a further solution of the utility model: the linear push rod has a two-stage stepped columnar structure that is thick at the front and thin at the back. The positioning ball head is fixed to the end of the large diameter section of the linear push rod. The outer ring of the small diameter section of the linear push rod is provided with a return spring. The two ends of the return spring are respectively in contact with the bottom surface of the sliding groove and the large diameter section of the linear push rod.

[0010] As a further solution of the utility model: a guide bevel groove is provided on the large diameter section of the linear push rod, and a driving rod that produces a telescopic action along the vertical direction is arranged under the locking seat. The end of the driving rod is in a wedge shape corresponding to the shape of the guide bevel groove. After the driving rod is inserted into the sliding groove along the vertical direction, it cooperates with the wedge surface of the guide bevel groove to drive the linear push rod to slide along the length direction of the sliding groove.

[0011] As a further solution of the utility model: an adjusting screw is installed at one end of the locking seat away from the U-shaped groove, and the adjusting screw is arranged along the length direction of the sliding groove. After cooperating with the locking seat thread, the linear push rod is abutted and pushed.

[0012] As a further solution of the utility model: the positioning key is arranged on the symmetrical axis of the U-shaped groove, and the welding tool is provided with positioning grooves arranged crosswise with the guide grooves in the vertical direction, and the welding tool is plugged into and matched with the positioning key through the positioning grooves.

[0013] As a further solution of the utility model: the tool clamp seat is arranged with clamp seats on both sides of the positioning key, and both clamp seats are provided with arc-shaped positioning convex strips, the positioning convex strips correspond to the height and curvature of the guide groove, and the clamp seats are engaged with the guide groove through the positioning convex strips.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. When replacing a welding tool according to the present invention, first align the positioning groove of the old welding tool with the positioning key on the tool holder seat, push the welding tool horizontally along the direction of the U-shaped groove notch into place, engage the positioning key with the positioning groove, start the locking seat, and make the positioning ball head at the end of the linear push rod press against the guide groove, thereby clamping and fixing the welding tool, pressing the welding tool in the U-shaped groove by the positioning ball head, and preventing the welding tool from rotating and positioning by the positioning key, so that the welding tool can be stably clamped and is not prone to positional displacement.

[0016] 2. The positioning key and positioning ball head of the present invention clamp the two points of the welding tool and realize line contact clamping through the plug-in cooperation of the positioning convex strip and the guide groove, and prevent the welding tool from shaking up and down; the reset spring is a compression spring, which can always apply an elastic pressing force to the linear push rod in the direction of the guide groove to ensure stable clamping; when releasing the lock, it is only necessary to move the driving rod upward, and the linear push rod can be returned to the sliding groove through the wedge surface cooperation to realize unlocking of the welding tool.

[0017] 3. The present invention can install an adjusting screw at the rear end of the locking seat, and can also adjust the linear push rod closely manually through the thread matching of the adjusting screw to ensure the accuracy of the clamping position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a cross-sectional view of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the welding tool in the utility model.

[0021] In the figure:

[0022] 1. Tool holder; 11. U-shaped groove; 12. Clamp seat; 121. Positioning convex strip;

[0023] 13. Locking seat; 131. Positioning ball head; 132. Driving rod;

[0024] 133. Linear push rod; 1331. Guide chute; 1332. Return spring;

[0025] 134. Sliding slot; 135. Adjusting screw;

[0026] 14. Positioning key; 15. Positioning platform;

[0027] 3. Welding tool; 31. Guide groove; 32. Positioning groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 3In the embodiment of the utility model, a tool holder for friction stir welding is provided, wherein the tool holder 1 is used to clamp a welding tool 3, and a U-shaped groove 11 is formed on the upper edge of the tool holder 1 for horizontal insertion of the welding tool 3. A positioning platform 15 is provided below the notch of the U-shaped groove 11, and after the welding tool 3 is horizontally inserted into the U-shaped groove 11, the positioning platform 15 of the tool holder 1 supports the welding tool 3 from bottom to top.

[0030] The outer ring of the welding tool 3 is provided with a guide groove 31 along the circumferential direction, and the welding tool 3 is also provided with a positioning groove 32 arranged crosswise with the guide groove 31 along the vertical direction. After the welding tool 3 is inserted into the U-shaped groove 11, it is arranged in close contact with the groove wall of the U-shaped groove 11. The guide groove 31 and the positioning groove 32 are both located on the stationary shaft shoulder.

[0031] The tool holder 1 is provided with positioning keys 14 arranged on the bottom surface of the adjacent U-shaped groove 11. After the welding tool 3 is inserted into the U-shaped groove 11, the positioning keys 14 of the tool holder 1 are plugged into and matched with the positioning groove 32 of the welding tool 3 to achieve anti-rotation positioning of the welding tool 3.

[0032] The tool holder 1 is also provided with an arc-shaped clamp seat 12 on both sides of the positioning key 14, and an arc-shaped positioning convex strip 121 is provided inside the clamp seat 12. The positioning convex strip 121 and the guide groove 31 of the welding tool 3 are located at the same height, and the radius of the positioning convex strip 121 is correspondingly equal to the radius of the guide groove 31. Both sets of positioning convex strips 121 are no more than one-fourth of the length of the guide groove 31. When the welding tool 3 is inserted into the deepest part of the U-shaped groove 11, the positioning convex strip 121 of the clamp seat 12 is plugged into and matched with the guide groove 31 of the welding tool 3 to prevent the welding tool 3 from shaking up and down.

[0033] In order to further improve the locking and positioning effect of the welding tool 3, a locking seat 13 is also provided on the tool holder seat 1 along the symmetric axis direction of the vertical U-shaped groove 11. A sliding groove 134 is provided in the locking seat 13 along the length direction, and a linear push rod 133 is coaxially installed in the sliding groove 134 and slides with the sliding groove 134. A positioning ball head 131 is provided at the rod end of the linear push rod 133, and the linear push rod 133 abuts against the guide groove 31 of the welding tool 3 through the positioning ball head 131. Along the axial direction of the U-shaped groove 11, the distance between the abutment point of the positioning ball head 131 and the bottom surface of the U-shaped groove 11 is greater than the radius of the guide groove 31, so that after the welding tool 3 is inserted into the bottom surface of the U-shaped groove 11, the positioning ball head 131 can press the welding tool 3 to prevent the welding tool 3 from withdrawing from the U-shaped groove 11.

[0034] The arrangement of the locking seat 13 along the symmetric axis of the vertical U-shaped groove 11 is only a preferred embodiment. In actual working conditions, it is only necessary to locate the final abutting position of the ball head 131 to meet the clamping condition of the welding tool 3 .

[0035] The linear push rod 133 is a two-stage stepped columnar structure with a thick front and a thin back. The positioning ball head 131 is fixed to the end of the large diameter section of the linear push rod 133. The outer ring of the small diameter section of the linear push rod 133 is provided with a return spring 1332. The two ends of the return spring 1332 are respectively in contact with the bottom surface of the sliding groove 134 and the large diameter section of the linear push rod 133. The return spring 1332 is a compression spring, which always applies an elastic pressing force to the linear push rod 133 in the direction of the guide groove 31.

[0036] A guide bevel groove 1331 is provided on the large diameter section of the linear push rod 133, and a driving rod 132 is provided below the locking seat 13 to produce a telescopic action in the vertical direction. The end of the driving rod 132 is in a wedge-shaped shape corresponding to the shape of the guide bevel groove 1331. After the driving rod 132 is inserted into the sliding groove 134 in the vertical direction, it cooperates with the wedge surface of the guide bevel groove 1331 to drive the linear push rod 133 to slide along the length direction of the sliding groove 134. The linear push rod 133 is displaced along the sliding groove 134 by pressing the driving rod 132 upward, thereby overcoming the elastic force of the reset spring 1332. When the linear push rod 133 drives the positioning ball head 131 to retract, it gives way to the exit path of the welding tool 3. The driving method of the driving rod 132 is not limited, and the driving rod 132 can be pushed up and down by pneumatic, hydraulic, or conventional linear power sources such as linear screws.

[0037] An adjusting screw 135 is installed at one end of the locking seat 13 away from the U-shaped groove 11 . The adjusting screw 135 is arranged along the length direction of the sliding groove 134 , and after being threadedly matched with the locking seat 13 , generates an abutting and pushing action on the linear push rod 133 .

[0038] When replacing the welding tool 3, first align the positioning groove 32 of the old welding tool 3 with the positioning key 14 on the tool holder seat 1, and then push the welding tool 3 horizontally along the notch direction of the U-shaped groove 11 into place, so that the positioning key 14 is engaged with the positioning groove 32. At this time, the positioning convex strip 121 of the clamp seat 12 is also plugged into the guide groove 31 of the welding tool 3, and the locking seat 13 is started to make the positioning ball head 131 press against the guide groove 31, so that the welding tool 3 is clamped and fixed.

[0039] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0040] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A tool holder for friction stir welding, characterized in that: The tool holder seat (1) is provided with a U-shaped groove (11) for horizontally inserting a welding tool (3), and a positioning platform (15) for supporting the welding tool (3); the tool holder seat (1) is provided with a positioning key (14) for plugging and cooperating with the welding tool (3); the tool holder seat (1) is provided with a linear push rod (133) capable of generating a linear telescopic movement in a horizontal direction, and the linear push rod (133) abuts against the welding tool (3) in an extended state, thereby clamping the welding tool (3) to prevent the welding tool (3) from exiting the U-shaped groove (11).

2. The tool holder for friction stir welding according to claim 1, characterized in that: The outer ring of the welding tool (3) is provided with a guide groove (31) along the circumferential direction; the linear push rod (133) and the guide groove (31) of the welding tool (3) are located at the same height; the arc radius of the U-shaped groove (11) corresponds to the radius of the guide groove (31); taking the opening direction of the U-shaped groove (11) as a first direction, along the first direction, the distance between the contact point between the linear push rod (133) and the guide groove (31) and the bottom surface of the U-shaped groove (11) is greater than the radius of the guide groove (31).

3. A tool holder for friction stir welding according to claim 1 or 2, characterized in that: The tool holder seat (1) is also provided with a locking seat (13), a sliding groove (134) is horizontally provided in the locking seat (13) along the opening direction of the vertical U-shaped groove (11), and a linear push rod (133) is coaxially installed in the sliding groove (134) and slidably cooperates with the sliding groove (134).

4. The tool holder for friction stir welding according to claim 3, characterized in that: A positioning ball head (131) is provided at the rod end of the linear push rod (133), and the linear push rod (133) abuts against the guide groove (31) of the welding tool (3) through the positioning ball head (131).

5. The tool holder for friction stir welding according to claim 4, characterized in that: The linear push rod (133) is in a two-stage stepped columnar structure with a thick front and a thin rear. The positioning ball head (131) is fixed to the end of the large diameter section of the linear push rod (133). The outer ring of the small diameter section of the linear push rod (133) is provided with a return spring (1332). The two ends of the return spring (1332) are respectively in contact with the bottom surface of the sliding groove (134) and the large diameter section of the linear push rod (133).

6. The tool holder for friction stir welding according to claim 5, characterized in that: A guide inclined groove (1331) is provided on the large diameter section of the linear push rod (133), and a driving rod (132) for generating a telescopic action in a vertical direction is provided below the locking seat (13), and the end of the driving rod (132) is in a wedge shape corresponding to the shape of the guide inclined groove (1331). After the driving rod (132) is inserted into the sliding groove (134) in the vertical direction, it cooperates with the wedge surface of the guide inclined groove (1331) to drive the linear push rod (133) to slide along the length direction of the sliding groove (134).

7. The tool holder for friction stir welding according to claim 3, characterized in that: An adjusting screw (135) is installed at one end of the locking seat (13) away from the U-shaped groove (11). The adjusting screw (135) is arranged along the length direction of the sliding groove (134) and produces an abutting and pushing action on the linear push rod (133) after being threadedly matched with the locking seat (13).

8. The tool holder for friction stir welding according to claim 2, characterized in that: The positioning key (14) is arranged on the symmetrical axis of the U-shaped groove (11); the welding tool (3) is provided with positioning grooves (32) arranged crosswise with the guide grooves (31) in the vertical direction; the welding tool (3) is plugged into and matched with the positioning key (14) through the positioning grooves (32).

9. The tool holder for friction stir welding according to claim 2, characterized in that: The tool holder seat (1) is provided with a clamp seat (12) on both sides of the positioning key (14), and both clamp seats (12) are provided with arc-shaped positioning convex strips (121). The positioning convex strips (121) correspond to the guide groove (31) in height and arc, and the clamp seat (12) is engaged with the guide groove (31) through the positioning convex strips (121).

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