Wedge-shaped clamping mechanism

Abstract

The utility model relates to the technical field of clamping mechanisms for friction stir welding, in particular to a wedge-shaped clamping mechanism. The guide device comprises a guide seat, a first movable block and a second movable block are arranged in the guide seat in a sliding mode, sliding paths of the first movable block and the second movable block intersect with each other, the adjacent ends of the first movable block and the second movable block are inner ends, the inner ends are in wedge face fit, and the outer end of the first movable block penetrates to the outer side of the guide seat. A straight stroke power mechanism is installed on the guide seat, a power component of the straight stroke power mechanism is connected with the outer end of the second movable block, the clamping mechanism further comprises a sealing cylinder, the sealing cylinder is located between the straight stroke power mechanism and the guide seat, and a sealing cavity of the power component is formed by an inner cavity of the sealing cylinder. According to the utility model, dustproof treatment can be carried out on a power source for clamping a workpiece, and a good locking effect on the workpiece can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping mechanisms for stir friction welding, in particular to a wedge-shaped clamping mechanism. Background Art

[0002] Friction stir welding refers to the use of the heat generated by the friction between the high-speed rotating welding tool and the workpiece to partially melt the material to be welded. When the welding tool moves forward along the welding interface, the plasticized material flows from the front to the back of the welding tool under the action of the rotating friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] In the process of friction stir welding, in order to prevent welding defects caused by the expansion effect of the welding tool on the weld seams of the workpiece, the workpiece needs to be clamped continuously and stably during the welding process. Most of the clamping mechanisms are described in the text of the Chinese patent publication number CN109604810B entitled a friction stir welding machine and the text of the Chinese patent publication number CN209157388U entitled an automatic positioning friction stir welding machine, which use a cylinder or a gas cylinder to drive the clamping plate to extend and retract to clamp the workpiece. However, in actual operation, the piston rod of the air cylinder or oil cylinder is mostly exposed to the air. Since the piston rod needs to continuously reciprocate, it is often inconvenient to carry out dust-proof treatment on it. In addition, workpiece welding is a dusty working environment. Over time, it is easy to affect the moving parts of the cylinder, resulting in a reduction in the service life of the cylinder. In addition, when the oil cylinder or air cylinder is subjected to axial force, the medium inside the cylinder body may be compressed, causing the piston rod of the oil cylinder or air cylinder to shrink, thereby causing the extrusion of the workpiece to loosen, and there is a problem of insufficient locking effect on the workpiece, which needs to be solved urgently. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a wedge-shaped clamping mechanism, which can not only perform dust-proof treatment on the power source for clamping the workpiece, but also achieve a good locking effect on the workpiece.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A wedge-shaped clamping mechanism comprises a guide seat, wherein a first movable block and a second movable block are slidably arranged inside the guide seat, and the sliding paths thereof intersect with each other. The adjacent ends of the first movable block and the second movable block are inner ends, and the inner ends form a wedge surface fit. The outer end of the first movable block passes through the outer side of the guide seat. A linear power mechanism is installed on the guide seat, and a power component of the linear power mechanism is connected to the outer end of the second movable block. The clamping mechanism also comprises a sealing cylinder, which is located between the linear power mechanism and the guide seat, and the inner cavity of the sealing cylinder constitutes a sealing cavity of the power component.

[0007] As a further solution of the utility model: the linear stroke power mechanism is a cylinder, the cylinder body of the cylinder is positioned and fixed on the guide seat through a sealing tube, and the piston rod of the cylinder constitutes the power component.

[0008] As a further solution of the utility model: a T-shaped straight groove is provided at the outer end of the second movable block, the groove length direction of the T-shaped straight groove is perpendicular to the sliding direction of the second movable block, the axis of the piston rod of the cylinder is arranged along the sliding direction of the second movable block, and a floating joint is fixed on the top of the piston rod, and the floating joint is slidably installed in the T-shaped straight groove.

[0009] As a further solution of the utility model: the inner ends of the first movable block and the second movable block are respectively an inclined dovetail groove and an inclined dovetail slider, and the inclined dovetail slider is slidably fitted in the inclined dovetail groove.

[0010] As a further solution of the utility model: the guide seat includes a base and a cover plate that are detachably connected to each other, and the base and the cover plate are combined to form a sliding chamber in which the first movable block and the second movable block slide.

[0011] As a further solution of the utility model: the side walls of the first movable block and the second movable block are both provided with oil grooves, and lubricating medium is arranged in the oil grooves.

[0012] As a further solution of the utility model: the lubricating medium is grease.

[0013] As a further solution of the utility model: a clamping plate is detachably fixed to the outer end of the first movable block.

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

[0015] 1. The clamping mechanism includes a sealing cylinder, which is located between the linear power mechanism and the guide seat, and the inner cavity of the sealing cylinder constitutes a sealing cavity of the power component, which can perform dust-proof treatment on the power source of the clamped workpiece; and then the outer end of the second movable block is connected in combination with the power component, so that the second movable block cooperates with the inclined wedge of the first movable block to drive the first movable block to indirectly squeeze the workpiece, which is beneficial to the friction self-locking property of the inclined wedge mechanism and can achieve a good locking effect on the workpiece.

[0016] 2. The linear motion power mechanism is composed of a cylinder, and the driving efficiency is high. In addition, the cylinder body of the cylinder is positioned and fixed on the guide seat through a sealing tube, which is also conducive to the sealing of the piston rod.

[0017] 3. During installation, the cylinder and the second movable block can be quickly installed by sliding the floating joint into the T-shaped straight groove. In addition, the sliding installation method of the floating joint and the T-shaped straight groove can reduce or avoid hard damage to the cylinder piston rod when the second movable block or the inner cavity of the guide seat is dislocated due to sliding wear.

[0018] 4. The inner ends of the first movable block and the second movable block are respectively an inclined dovetail groove and an inclined dovetail slider, and the inclined dovetail slider is slidably fitted in the inclined dovetail groove, so that a sliding connection is formed between the inner ends of the first movable block and the second movable block to prevent the first movable block from sliding outwards and separating from the guide seat due to external force.

[0019] 5. The combined structure of the base and the cover plate is adopted. After the cover plate is disassembled, the first movable block and the second movable block can be easily disassembled.

[0020] 6. The side walls of the first movable block and the second movable block are both provided with oil grooves, and lubricating medium is arranged in the oil grooves, so as to reduce the sliding wear of the first movable block and the second movable block and reduce the resistance during the sliding process.

[0021] 7. The lubricating medium is grease, which is beneficial to its solid properties and helps to keep the lubricating medium in the oil tank.

[0022] 8. A clamping plate is detachably fixed to the outer end of the first movable block. In actual implementation, the clamping stroke of the clamping mechanism can be adjusted by installing clamping plates of different thicknesses, thereby improving the versatility of the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0025] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0026] Figure 4 It is a structural schematic diagram of the first movable block and the second movable block in the utility model.

[0027] In the figure: 10, sealing cylinder; 20, guide seat; 21, cover plate; 22, base; 30, cylinder; 40, first movable block; 41, clamping plate; 42, inclined dovetail groove; 50, second movable block; 51, T-shaped straight groove; 52, inclined dovetail slider; 60, floating joint; 70, oil tank. 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] For ease of understanding, the specific structure and working mode of the utility model are further described below in conjunction with the accompanying drawings:

[0030] The specific structure of the utility model refers to Figure 1-4 As shown, its main structure includes a guide seat 20, a first movable block 40 and a second movable block 50 constituting a wedge mechanism, and a linear motion power mechanism for driving the first movable block 40 and the second movable block 50 to move. Specifically, the first movable block 40 and the second movable block 50 slide inside the guide seat 20, and the sliding paths intersect each other; the adjacent ends of the first movable block 40 and the second movable block 50 are inner ends, and the inner ends form a wedge surface fit. Further, the outer end of the first movable block 40 penetrates to the outside of the guide seat 20, and the outer end of the first movable block 40 constitutes an extrusion end, which is used to clamp the workpiece during welding. A linear motion power mechanism is installed on the guide seat 20, and the power component of the linear motion power mechanism is connected to the outer end of the second movable block 50. When working, the power component of the linear motion power mechanism moves to drive the second movable block 50 to slide, and the second movable block 50 cooperates with the wedge of the inner end of the first movable block 40, thereby driving the first movable block 40 to slide outward to clamp the workpiece. In addition, the clamping mechanism also includes a sealing cylinder 10, which is located between the linear power mechanism and the guide seat 20, and the inner cavity of the sealing cylinder 10 constitutes a sealed cavity of the power component, which can perform dust-proof treatment on the power source of the clamped workpiece; and then combined with the power component to connect the outer end of the second movable block 50, so as to utilize the inclined wedge cooperation of the second movable block 50 and the first movable block 40 to drive the first movable block 40 to indirectly squeeze the workpiece, which is beneficial to the friction self-locking property of the inclined wedge mechanism and can achieve a good locking effect on the workpiece.

[0031] Further, such as Figure 1 As shown, the linear power mechanism is a cylinder 30, the cylinder body of the cylinder 30 is positioned and fixed on the guide seat 20 through a sealing tube 10, and the piston rod of the cylinder 30 constitutes a power component. The linear power mechanism formed by the cylinder 30 has high driving efficiency. In addition, the cylinder body of the cylinder 30 is positioned and fixed on the guide seat 20 through the sealing tube 10, which is also conducive to the sealing of the piston rod. Of course, the linear power mechanism can also adopt a mechanism that can realize linear drive, such as a screw slider mechanism.

[0032] Further, such as Figure 4As shown, the outer end of the second movable block 50 is provided with a T-shaped straight groove 51, and the groove length direction of the T-shaped straight groove 51 is perpendicular to the sliding direction of the second movable block 50; the axis of the piston rod of the cylinder 30 is arranged along the sliding direction of the second movable block 50, and a floating joint 60 is fixed on the top of the piston rod, and the floating joint 60 is slidably installed in the T-shaped straight groove 51. During installation, the floating joint 60 can be slid into the T-shaped straight groove 51 to quickly realize the installation between the cylinder 30 and the second movable block 50. In addition, by adopting the sliding installation method of the floating joint 60 and the T-shaped straight groove 51, when the sliding wear of the inner cavity of the second movable block 50 or the guide seat 20 causes the second movable block 50 to be misaligned, the hard damage to the piston rod of the cylinder 30 can be reduced or avoided.

[0033] In addition, if Figure 4 As shown, the inner ends of the first movable block 40 and the second movable block 50 are respectively an inclined dovetail groove 42 and an inclined dovetail slider 52, and the inclined dovetail slider 52 is slidably fitted in the inclined dovetail groove 42. A sliding connection is formed between the inner ends of the first movable block 40 and the second movable block 50 to prevent the first movable block 40 from sliding outwards and separating from the guide seat 20 due to external force.

[0034] On the basis of the above, if Figure 1 and Figure 3 As shown, the guide seat 20 includes a base 22 and a cover plate 21 that are detachably connected to each other. The base 22 and the cover plate 21 are combined to enclose a sliding chamber for sliding the first movable block 40 and the second movable block 50. With the combined structure of the base 22 and the cover plate 21, after the cover plate 21 is disassembled, the first movable block 40 and the second movable block 50 can be easily disassembled.

[0035] In order to reduce the sliding wear of the first movable block 40 and the second movable block 50 and reduce the resistance during the sliding process, as Figure 4 As shown, the side walls of the first movable block 40 and the second movable block 50 are both provided with oil grooves 70, and lubricating medium is arranged in the oil grooves 70. Specifically, the lubricating medium is grease, which is beneficial to its solid property and is conducive to keeping the lubricating medium stored in the oil grooves 70.

[0036] In addition, if Figure 2 As shown, a clamping plate 41 is detachably fixed to the outer end of the first movable block 40. In actual implementation, the clamping stroke of the clamping mechanism can be adjusted by installing clamping plates 41 of different thicknesses, thereby improving the versatility of the clamping mechanism.

[0037] Of course, for those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0039] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A wedge-shaped clamping mechanism, characterized in that: The invention comprises a guide seat (20), wherein a first movable block (40) and a second movable block (50) are slidably provided inside the guide seat (20), wherein the sliding paths intersect each other, wherein the adjacent ends of the first movable block (40) and the second movable block (50) are inner ends, and the inner ends form a wedge surface fit, and the outer end of the first movable block (40) penetrates to the outer side of the guide seat (20), and a linear power mechanism is installed on the guide seat (20), and the power component of the linear power mechanism is connected to the outer end of the second movable block (50), and the clamping mechanism also comprises a sealing cylinder (10), wherein the sealing cylinder (10) is located between the linear power mechanism and the guide seat (20), and the inner cavity of the sealing cylinder (10) constitutes a sealing cavity of the power component.

2. A wedge-shaped clamping mechanism according to claim 1, characterized in that: The linear stroke power mechanism is a cylinder (30), the cylinder body of the cylinder (30) is positioned and fixed on the guide seat (20) through a sealing tube (10), and the piston rod of the cylinder (30) constitutes the power component.

3. A wedge-shaped clamping mechanism according to claim 2, characterized in that: The outer end of the second movable block (50) is provided with a T-shaped straight groove (51), the groove length direction of the T-shaped straight groove (51) is perpendicular to the sliding direction of the second movable block (50), the axis of the piston rod of the cylinder (30) is arranged along the sliding direction of the second movable block (50), and a floating joint (60) is fixed on the top of the piston rod, and the floating joint (60) is slidably installed in the T-shaped straight groove (51).

4. A wedge-shaped clamping mechanism according to any one of claims 1 to 3, characterized in that: The inner ends of the first movable block (40) and the second movable block (50) are respectively an inclined dovetail groove (42) and an inclined dovetail slider (52), and the inclined dovetail slider (52) is slidably fitted in the inclined dovetail groove (42).

5. A wedge-shaped clamping mechanism according to claim 4, characterized in that: The guide seat (20) comprises a base (22) and a cover plate (21) which are detachably connected to each other, and the base (22) and the cover plate (21) are combined to enclose a sliding chamber in which the first movable block (40) and the second movable block (50) slide.

6. A wedge-shaped clamping mechanism according to any one of claims 1 to 3, characterized in that: The side walls of the first movable block (40) and the second movable block (50) are both provided with oil grooves (70), and lubricating medium is arranged in the oil grooves (70).

7. A wedge-shaped clamping mechanism according to claim 6, characterized in that: The lubricating medium is grease.

8. A wedge-shaped clamping mechanism according to any one of claims 1 to 3, characterized in that: A clamping plate (41) is detachably fixed to the outer end of the first movable block (40).

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