Fastener man-machine cooperation assembly platform

Abstract

The spring washer is used as the most common mechanical anti-loosening mode, and the combination of the spring washer and the flat washer is widely applied to engineering machinery assembly. However, a lot of time of workers can be spent on the work of penetrating the elastic gasket and the flat gasket. Aiming at the related problems of long manual assembly time, neglected assembly and the like in the assembly process of the combined screws, the invention provides the man-machine collaborative assembly platform for the fasteners, so that the assembly efficiency of the combined screws is greatly improved, and the neglected assembly problem of the combined screws is solved. Tests show that the assembling of the combined screws on the parts can be rapidly completed by applying the platform, and the platform is equipment worthy of popularization in the assembling field and has huge benefits.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly, and in particular relates to a fastener human-machine collaborative assembly platform. Background Art

[0002] As the most commonly used mechanical anti-loosening method, spring washers are widely used in combination with flat washers in the assembly of engineering machinery. Before the advent of combination screws (with built-in spring washers and flat washers), workers had to insert the spring washers and flat washers into the screws before screwing the whole into the internal thread base during the fastener assembly process. Obviously, the work of inserting spring washers and flat washers takes up a lot of workers' time. The advent of combination screws means that workers no longer need to manually insert spring washers and flat washers, saving a lot of workers' time during the assembly process. Most of the existing assembled parts in our institute use combination screws, which are used in huge quantities every year. During the assembly process, workers need to manually remove nails and tighten them manually, which results in low assembly efficiency.

[0003] In the existing technology, the research on fastener automated assembly equipment is relatively mature, but automated assembly equipment is more suitable for single-variety, large-volume parts, while most of our work involves the assembly of combined screws on multi-variety, small-volume parts. Therefore, it is urgent to develop a fastener human-machine collaborative assembly platform that can improve both assembly efficiency and assembly quality. Summary of the invention

[0004] To this end, the present invention aims at the problems of long manual assembly time and missing assembly during the assembly of combination screws, and proposes a human-machine collaborative assembly platform for fasteners, which greatly improves the assembly efficiency of combination screws and solves the problem of missing assembly of combination screws. Experiments show that the application of the platform can quickly complete the assembly of combination screws on components, and is a device worthy of promotion in the field of assembly and has great benefits.

[0005] A fastener human-machine collaborative assembly platform of the present invention is characterized in that it includes an assembly table, a guide rail, a power-assisted mechanical arm, an electric screwdriver, a cylinder assembly, a front-end clamp, an air pipe and a vibration plate; the guide rail is arranged on the assembly table, the electric screwdriver is connected to the end of the power-assisted mechanical arm, the front-end clamp is fixed under the electric screwdriver, the other end of the power-assisted mechanical arm is connected to the cylinder assembly, the cylinder assembly is fixed on the guide rail to realize the up and down movement of the mechanical arm, and the air pipe is connected to the cylinder assembly.

[0006] The front end clamp has three steel balls and three springs built in, with their centers in a horizontal plane. The inner diameter formed by the steel balls is larger than the outer diameter of the screw head, but smaller than the outer diameter of the flat washer. During operation, the screw blown to the front end of the clamp first falls above the steel balls, and the power tool handle pushes it down and straightens it, and finally it falls on the lowest step in the front end clamp, ensuring the verticality of the exposed external threaded part of the combination screw.

[0007] Furthermore, the connection between the electric screwdriver and the power-assisted robotic arm also includes a universal joint, in which a steel ball is fixed to the electric screwdriver, and the two can rotate and swing as a whole in the universal joint seat, thereby achieving alignment of the screw hole during the assembly process.

[0008] The beneficial effects of the present invention are

[0009] 1. The assembly platform has a wide range of applications and is highly adaptable to the working environment.

[0010] 2. The structure and manufacturing process are relatively mature, easy to operate, and conducive to mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the structural diagram of the fastener human-machine collaborative assembly platform.

[0012] Figure 2 This is a diagram of the internal structure of the front clamp.

[0013] Figure 3 This is a diagram of the internal structure of the universal joint. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The workflow of the assembly platform of the present invention is as follows:

[0016] 1. Turn on the machine and pour the combination screws into the vibration plate.

[0017] 2. Place the workpiece flat on the assembly table, double-click the trigger button on the electric screwdriver, the cylinder assembly moves to the lowest position, the combination screw is blown to the front clamp, the cylinder assembly moves to the initial position, and the front end of the electric screwdriver pushes against the combination screw head (see attached Figure 2 ).

[0018] 3. The worker holds the electric screwdriver and moves it to just above the internal threaded hole of the workpiece.

[0019] 4. Click and hold the trigger button on the electric screwdriver, the cylinder assembly moves to the highest position, and the assembled screws are locked. During the process, the universal joint at the connection between the electric screwdriver and the power-assisted mechanical arm is used to align the screw holes during assembly (see attached). Figure 3 ).

[0020] 5. After the locking is completed, the worker moves the electric screwdriver to another position, releases the trigger button on the electric screwdriver, the cylinder assembly moves to the lowest position, the combination screw is blown to the front clamp, the cylinder assembly moves to the initial position, and the front end rod of the electric screwdriver presses against the head of the combination screw.

[0021] 6. Repeat 3-5 until the part is assembled.

[0022] The present invention is applied to assemble 8 M3 combination screws on a certain housing. Workers manually assemble 20 housings (a total of 160 combination screws). According to statistics, it takes about 32 minutes in total. Using the assembly platform to assemble the same 160 combination screws, it takes about 8 minutes in total, the efficiency is improved by nearly 3 times, and the assembly qualification rate reaches 100%.

[0023] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fastener human-machine collaborative assembly platform, characterized in that: It includes an assembly platform, a guide rail, a power-assisted mechanical arm, an electric screwdriver, a cylinder assembly, a front-end clamp, an air pipe and a vibration plate; the guide rail is arranged on the assembly platform, the electric screwdriver is connected to the end of the power-assisted mechanical arm, the front-end clamp is fixed under the electric screwdriver, the other end of the power-assisted mechanical arm is connected to the cylinder assembly, the cylinder assembly is fixed on the guide rail to realize the up and down movement of the mechanical arm, and the air pipe is connected to the cylinder assembly.

2. A fastener human-machine collaborative assembly platform according to claim 1, characterized in that: The front end clamp has three steel balls and three springs built in, the centers of which are in a horizontal plane. The inner diameter formed by the steel balls is larger than the outer diameter of the screw head and smaller than the outer diameter of the flat washer. During operation, the screw blown to the front end of the clamp first falls above the steel balls, and the electric tool handle pushes it down and straightens it, and finally falls on the lowest step in the front end clamp, ensuring the verticality of the exposed external threaded part of the combination screw.

3. A fastener human-machine collaborative assembly platform according to claim 1, characterized in that: The connection between the electric screwdriver and the power-assisted robotic arm also includes a universal joint, in which a steel ball is fixed to the electric screwdriver. The two can rotate and swing in the universal joint seat as a whole, thereby realizing the alignment of the screw hole during the assembly process.

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