Man-machine collaborative assembly workbench for wire thread insert

Abstract

The invention provides a man-machine cooperative assembly workbench for a steel wire thread insert. A high-precision guide rail, a power-assisted support arm, a double-channel feeding structure, an electric mounting tool and a traditional bench worker workbench are integrated. Two-way automatic feeding and clamping of the steel wire thread insert are achieved through the two-channel feeding mechanism, workers do not need to grab the steel wire thread insert manually, and meanwhile the steel wire thread insert can be provided for two stations. The power-assisted supporting arm is used, vertical material taking and threaded sleeve screwing of the electric installation tool are guaranteed, the weight of the installation tool can be reduced through counter-acting force, and the working intensity is reduced. A high-precision guide rail is adopted, the reachable range of the assistance supporting arm is enlarged, and the device is suitable for assembling steel wire thread inserts of parts of multiple sizes.

Description

Technical Field

[0001] The invention belongs to the field of parts assembly, and in particular relates to a human-machine collaborative assembly workbench for a wire screw sleeve. Background Art

[0002] In the current field of mechanical design, in order to further adapt to the trend of lightening and thinning, most structural parts use aluminum alloy materials instead of steel materials. However, aluminum alloy has weak shear resistance in threaded connections, which contradicts its own lightweight advantage. Therefore, wire screw sleeves are often installed in threaded holes to ensure the reliability of screws during repeated disassembly and assembly. The number of wire screw sleeves used in a traditional machinery manufacturing plant is in the millions each year. At present, the assembly of wire screw sleeves is basically manual work: front-line workers grab the wire screw sleeve with their left hand, operate the electric installation tool with their right hand to tighten the wire screw sleeve, and then screw the sleeve into the part to be installed. The assembly of a single screw sleeve is cumbersome, requires the cooperation of both hands, and has low assembly efficiency. In addition, since the electric installation tool has a certain weight, long-term use can easily cause worker fatigue. Summary of the invention

[0003] In order to overcome the problems of low efficiency and high labor intensity in the current assembly of wire screw inserts, the present invention proposes a human-machine collaborative assembly workbench for wire screw inserts, which integrates high-precision guide rails, power-assisted support arms, dual-channel feeding structures, electric installation tools and traditional benchwork workbenches. The dual-channel feeding mechanism realizes automatic bidirectional feeding and clamping of wire screw inserts, eliminating the need for workers to manually grasp the wire screw inserts, and can provide wire screw inserts for two workstations at the same time. The use of power-assisted support arms ensures that the electric installation tool can vertically pick up materials and tighten the screw inserts, and the reaction force can be used to reduce the weight of the installation tool and reduce the work intensity. The use of high-precision guide rails increases the reach of the power-assisted support arms, which is suitable for the assembly of wire screw inserts for parts of multiple sizes.

[0004] A wire screw insert human-machine collaborative assembly workbench of the present invention comprises two power-assisting support arms (1), a dual-channel feeding device (2), two high-precision guide rails (3), a benchwork workbench (4), and two pairs of electric installation tools (5).

[0005] The high-precision guide rail (3) is embedded in the bench workbench by screws. A wire groove is opened inside the high-precision guide rail (3) to conveniently hide the power line of the electric installation tool (5). The power-assisting support arm (1) is connected to the high-precision guide rail (3) through a transition plate to achieve a large-scale lateral movement of the power-assisting support arm (1). The electric installation tool (5) is clamped by a clamping mechanism at the end of the power-assisting support arm (1). The end clamping mechanism fits the contour of the electric installation tool (5) to control the electric installation tool (5) to be perpendicular to the working plane. The dual-channel feeding device (2) is fixed on the bench workbench (4) by a bottom vacuum sticker to ensure that front-line operators can take materials comfortably.

[0006] Furthermore, the feeding mechanism of the dual-channel feeding equipment mainly consists of a vibration plate (2.5), two direct vibrations (2.14), and two direct vibration tracks (2.6). The vibration plate (2.5) is screwed and fixed on the equipment housing (2.1). A certain gap is controlled between the vibration plate and the direct vibration to ensure that the wire screw sleeve can be fed into the clamping structure part in an upright posture. An infrared switch is arranged on the direct vibration track (2.6) for material arrival detection. When the number of wire screw sleeves on the direct vibration reaches a certain number, the vibration plate stops vibrating and only the direct vibration is retained to continue vibrating, thereby reducing equipment noise pollution.

[0007] Furthermore, the clamping mechanism of the dual-channel feeding device (2) is composed of an optical fiber switch (2.7) and a clamping cylinder (2.9). The operation process of the clamping mechanism is as follows:

[0008] When the optical fiber switch (2.7) detects that there is no wire screw sleeve in the clamping cylinder (2.9), the clamping cylinder is loosened, and the wire screw sleeve enters the clamping cylinder (2.9) by direct vibration. At this time, the optical fiber switch (2.7) detects that there is material in the clamping cylinder (2.9), and based on the feedback signal of the clamping mechanism (2.9), the clamping mechanism (2.9) clamps the wire screw sleeve with a clamping force of about 0.2N.

[0009] Furthermore, the dual-channel feeding device (2) material-retrieving structure is composed of a buffer device (2.8), a grating switch (2.13), a mini air valve (2.10), and a buffer bracket (2.12). Among them, springs are provided on the support rods on both sides of the buffer device (2.8) to reduce the impact force and gravity when the electric installation tool (5) retrieves materials. A material-retrieving hole is provided in the middle of the buffer device (2.8). The deviation between the center of the material-retrieving hole and the center of the clamping cylinder does not exceed 0.1m, so as to ensure that the electric tool can be aligned with the wire screw sleeve when retrieving materials. The operation process of the material-retrieving structure is as follows:

[0010] When the electric tool (5) takes material through the material taking hole on the buffer device (2.8), the buffer device (2.8) is compressed, triggering the delay signal of the grating switch (2.13). After a period of delay, the electric installation tool (5) tightens the wire screw sleeve, the clamping cylinder (2.9) is released, the wire screw sleeve is taken out, and the new wire screw sleeve enters the clamping mechanism (2.9) again to carry out the next material taking cycle. In order to ensure that the wire screw sleeve does not fall over and affect the assembly during the material taking process, the mini air valve (2.10) will synchronously clamp the next wire screw sleeve to be assembled during the tightening process of the previous wire screw sleeve. After the previous wire screw sleeve completes the material taking, the mini air valve is released (2.10).

[0011] Furthermore, the dual-channel feeding device (2) has a wire screw insert counting function, and the number of wire screw inserts installed at the two workstations is displayed in real time on the display screen (2.2), and has a counting reset and clearing function to prevent the wire screw inserts from being installed incorrectly or missing.

[0012] Furthermore, the clamping cylinder (2.9) should be designed according to the specifications of the wire screw insert to ensure that the wire screw insert does not slip when tightened under the agreed clamping force.

[0013] The beneficial effects of the present invention are

[0014] (1) By configuring a dual-channel feeding device, the wire thread insert can be automatically fed in both directions. Workers only need one hand to remove the wire thread insert, which greatly improves assembly efficiency and equipment utilization.

[0015] (2) By configuring guide rails and power-assisted support arms, the size range of products that can be assembled is further expanded, greatly reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure diagram of a wire screw insert human-machine collaborative assembly workbench.

[0017] Figure 2 This is the appearance structure diagram of the dual-channel feeding equipment.

[0018] Figure 3 This is an axonometric view of the internal structure of the dual-channel feeding equipment.

[0019] Figure 4 A top view of the internal structure of the dual-channel feeding equipment

[0020] Among them, 1—power-assisted support arm, 2—dual-channel feeding equipment, 3—high-precision guide rail, 4—fitter workbench, 5—electric installation tool, 2.1—equipment housing, 2.2—display screen, 2.3—start and stop button, 2.4—warning light, 2.5—vibration plate, 2.6—direct vibration track, 2.7—optical fiber switch, 2.8—buffer device, 2.9—clamping mechanism, 2.10—mini air valve, 2.11—direct vibration bracket, 2.12—buffer bracket, 2.13—grating switch, 2.14—direct vibration. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1 As shown, a wire screw insert human-machine collaborative assembly workbench of the present invention includes two power-assisting support arms 1, a dual-channel feeding device 2, two high-precision guide rails 3, a bench workbench 4, and two pairs of electric installation tools 5.

[0023] The high-precision guide rail 3 is embedded in the bench workbench by screws. A wire groove is opened inside the high-precision guide rail 3 to conveniently hide the power cord of the electric installation tool 5. The power-assisting support arm 1 is connected to the high-precision guide rail 3 through a transition plate to achieve a large lateral movement of the power-assisting support arm 1. The electric installation tool 5 is clamped by the clamping mechanism at the end of the power-assisting support arm 1. The end clamping mechanism fits the contour of the electric installation tool 5 to control the electric installation tool 5 to be perpendicular to the working plane. The dual-channel feeding device 2 is fixed to the bench workbench 4 by a bottom vacuum sticker to ensure that front-line operators can take materials comfortably.

[0024] Taking a large batch of shell assembly as an example, 30 wire screw sets need to be assembled, and the size of the wire screw sets is WT3×0.5×1.5D.

[0025] like Figure 2 and 3 As shown, in the actual assembly process, two operators sit on both sides of the assembly workbench, place the shell on the workstation, put the wire screw sleeve into the double-channel feeding device 2, and feed the wire screw sleeve into the clamping cylinder 2.9 through the joint action of the vibration plate 2.5, the direct vibration track 2.6, and the direct vibration 2.14. The center hole size of the clamping cylinder is designed to be 3.75mm, and the clamping force of the air valve is adjusted to 0.2N, which can ensure the clamping of the wire screw sleeve.

[0026] The operator uses the electric installation tool fixed on the power support arm to pick up the material. The electric installation tool passes through the picking hole, the buffer device 2.8 is compressed, and the delay signal of the grating switch 2.13 is triggered. After a period of delay, the electric installation tool 5 tightens the wire screw sleeve, and the clamping cylinder 2.9 is loosened to complete the wire screw sleeve picking up. At this time, when the optical fiber switch 2.7 detects that there is no wire screw sleeve in the clamping cylinder 2.9, the clamping cylinder is loosened, and the next wire screw sleeve to be assembled enters the clamping cylinder 2.9 by direct vibration to carry out the next picking up cycle. During the tightening process of the previous wire screw sleeve, the mini air valve 2.10 will synchronously clamp the next wire screw sleeve to be assembled. After the previous wire screw sleeve is finished picking up, the mini air valve 2.10 will be synchronously loosened. After one picking up is completed, the wire screw sleeve count on the display screen increases by 1.

[0027] An infrared switch is arranged on the direct vibration track 2.6. When the number of wire screw sleeves in the direct vibration track reaches 50, the vibration plate 2.5 stops vibrating and keeps the direct vibration to continue working. When the number of wire screw sleeves on the direct vibration track is less than 20, the vibration plate restarts to reduce the working noise caused by the vibration plate.

[0028] The operator takes out the wire screw sleeve with the reverse force provided by the power arm 1 and completes the assembly of the wire screw sleeve on the shell. Since the wire screw sleeve holes on the shell are scattered, the horizontal dimension span of the shell reaches 450mm. During the material removal and assembly process, the high-precision guide rail 3 provides lateral freedom to ensure the smooth assembly of the shell. The assembly efficiency of a single shell wire screw sleeve is increased by 35%.

[0029] 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 wire screw insert human-machine collaborative assembly workbench, characterized in that: Includes 2 power-assisted support arms, dual-channel feeding equipment, 2 high-precision guide rails, bench workbench, and 2 pairs of electric installation tools; The high-precision guide rail is embedded in the bench workbench by screws. A wire groove is opened inside the high-precision guide rail to hide the power cord of the electric installation tool. The power-assisting support arm is connected to the high-precision guide rail by a transition plate to achieve a large lateral movement of the power-assisting support arm. The electric installation tool is clamped by the clamping mechanism at the end of the power-assisting support arm. The end clamping mechanism fits the contour of the electric installation tool to control the electric installation tool to be perpendicular to the working plane. The dual-channel feeding equipment is fixed to the bench workbench by a vacuum sticker at the bottom to ensure that front-line operators can take materials comfortably.

2. A wire screw insert human-machine collaborative assembly workbench as claimed in claim 1, characterized in that: The feeding mechanism of the dual-channel feeding equipment includes 1 vibration plate, 2 direct vibration plates, and 2 direct vibration tracks. The vibration plate is screwed and fixed on the equipment casing. A certain gap is controlled between the vibration plate and the direct vibration plates to ensure that the wire screw sleeves can be fed into the clamping structure part in an upright posture. An infrared switch is arranged on the direct vibration track for material arrival detection. When the number of wire screw sleeves on the direct vibration plates reaches a certain number, the vibration plate stops vibrating and only the direct vibration plates continue to vibrate.

3. A wire screw insert human-machine collaborative assembly workbench as claimed in claim 2, characterized in that: The clamping mechanism of the dual-channel feeding equipment includes an optical fiber switch and a clamping cylinder; when the optical fiber switch detects that there is no wire screw sleeve in the clamping cylinder, the clamping cylinder is loosened, and the wire screw sleeve enters the clamping cylinder by direct vibration. At this time, after the optical fiber switch detects that there is material in the clamping cylinder, the clamping mechanism clamps the wire screw sleeve based on the feedback signal of the clamping mechanism.

4. A wire screw insert human-machine collaborative assembly workbench as claimed in claim 3, characterized in that: The material taking structure of the dual-channel feeding equipment includes a buffer device, a grating switch, a mini air valve, and a buffer bracket; wherein springs are arranged on the support rods on both sides of the buffer device to reduce the impact force and gravity when the electric installation tool takes the material; a material taking hole is arranged in the middle of the buffer device, and the deviation between the center of the material taking hole and the center of the clamping cylinder does not exceed 0.1m; When the electric tool takes material through the material taking hole on the buffer device, the buffer device is compressed, triggering the delay signal of the grating switch. After a period of delay, the electric installation tool tightens the wire screw sleeve, the clamping cylinder is loosened, the wire screw sleeve is taken out, and the new wire screw sleeve enters the clamping mechanism again for the next material taking cycle; during the tightening process of the previous wire screw sleeve, the mini air valve synchronously clamps the next wire screw sleeve to be assembled, and the mini air valve is loosened after the previous wire screw sleeve completes taking out.

5. A wire screw insert human-machine collaborative assembly workbench as claimed in any one of claims 1 to 4, characterized in that: The dual-channel feeding equipment has a wire screw insert counting function. The number of wire screw inserts installed at the two workstations is displayed in real time on the display screen, and has a counting reset and clearing function.

6. A wire screw insert human-machine collaborative assembly workbench as claimed in claim 3, characterized in that: The clamping cylinder is designed according to the specifications of the wire screw sleeve to ensure that the wire screw sleeve does not slip when tightened under the agreed clamping force.

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