Anti-collision protection device for working head of automatic drilling and riveting equipment

Abstract

The utility model provides an anti-collision protection device for a working head of automatic drilling and riveting equipment, which comprises a pressure sensor protection strip, a signal processing module, a signal conversion module, a voltage conversion module and a mounting base, the signal processing module is connected with the pressure sensor and outputs a voltage signal according to the pressure state of the sensor, and the signal conversion module is connected with the signal processing module and converts the voltage signal into a high-low level signal which can be read by equipment. The voltage conversion module is connected with the signal processing module, and the signal conversion module provides working voltage. The device is installed at a position, possibly colliding with a product, on an equipment working head in an adhesive tape covering and pasting mode, the signal output end of the voltage signal conversion module is connected into an equipment PLC control circuit, and when the equipment working head collides with the product, a detection signal for detecting whether the product collides with the equipment can be fed back to the equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to aerospace technology field relates to a kind of automatic drilling and riveting equipment work head anti-collision protection device. BACKGROUND

[0002] In the assembly process of components in the field of aviation, when the automatic five-axis numerical control or robot drilling and riveting system is applied, interference collision between equipment and product, equipment and tooling may occur due to programming errors, deviations between product tooling and equipment state and theory, etc. The probability of collision between the upper and lower work heads of the equipment and the product is relatively high. The current protection measures mainly include offline programming simulation, 3D printing of dummy parts for empty running verification, and work head collision separation. The first two protection methods are simulation and inspection, which are greatly affected by operation and implementation. They may not be accurate and sufficient, and cannot completely prevent collision. The work head collision separation method is an absolute protection method, but it can only be designed and implemented during equipment design, and cannot be widely applied through subsequent modification.

[0003] To address the potential omissions in simulation inspection, the device uses a work head end collision monitoring method based on force sensors. It is an end hardware protection measure that can trigger sensor signal feedback when the equipment collides, stop the feed control, and prevent further collision. The external installation method of the device can be installed and used on equipment without collision separation protection function, providing end hardware protection function and greatly improving the protection capability. SUMMARY

[0004] The utility model aims at solving the interference collision problem between the end work head of automatic drilling and riveting equipment and the product. It can automatically stop the equipment and protect the product from damage when the equipment collides with the product due to programming errors or product state deviations. Based on the force sensor signal feedback mechanism, an automatic drilling and riveting equipment work head anti-collision protection device is designed.

[0005] The utility model provides a kind of automatic drilling and riveting equipment work head collision protection device, including pressure sensor protection strip 1, signal processing module 2, signal conversion module 3, voltage conversion module 4 and installation base 5;

[0006] The pressure sensor protection strip 1 is pasted on the position where the equipment work head may collide with the product by adhesive tape;

[0007] The pressure sensor protection strip 1 is connected to the signal processing module 2 through wires, the signal processing module 2 is connected to the signal conversion module 3 through wires, and the voltage conversion module 4 is connected to the signal processing module 2 and the signal conversion module 3 through wires.

[0008] Further, the pressure sensor protection strip 1 is assembled by laminating and bonding a stainless steel sheet surface protection layer 1-1, a sheet-shaped long strip-shaped pressure sensor layer 1-2, a rubber protection layer 1-3 and a back adhesive layer 1-4.

[0009] Further, two pins on the sheet-shaped long strip-shaped pressure sensor layer 1-2 are connected to two signal input terminals of the signal processing module 2 through wires, one signal output terminal AO of the signal processing module 2 is connected to one signal input terminal IN+ of the signal conversion module 3 through wires, and one signal output terminal OUT of the signal conversion module 3 is connected to the equipment control system through wires.

[0010] Further, two input terminals IN+ and IN- of the voltage conversion module 4 are respectively connected to the equipment control system through wires, and are connected to two input terminals VCC and IN- of the signal conversion module 3, and two output terminals OUT+ and OUT- of the voltage conversion module 4 are respectively connected to power input terminals VCC and GND of the signal processing module 2 through wires.

[0011] Further, the thickness of the rubber protection layer is 2-4 mm.

[0012] Further, the signal processing module (2) adopts a double-voltage comparator chip integrated circuit, the signal conversion module (3) adopts a PNP output type optical coupling isolation chip integrated circuit, and the voltage conversion module (3) adopts a step-down power management single-chip integrated circuit.

[0013] The utility model has the advantages that:

[0014] 1) The signal detection feedback loop is designed based on the sheet-shaped pressure sensor, and is directly connected to the working head of the equipment, so that real-time automatic protection can be realized during the running of the equipment and the processing of products.

[0015] 2) The pressure sensor protection strip adopts a long strip-shaped sheet design, can be cut and adjusted in thickness, and is installed in parallel on the surfaces of the working head of the equipment, so that collision protection in multiple directions can be realized.

[0016] 3) The pressure sensor protection strip has the characteristics of small size and easy installation, and can be directly installed on the surface of the existing working head of the equipment without the need to modify the equipment.

[0017] 4) The control circuit adopts a modular chip, and is simple to assemble and low in cost.

[0018] The application will be described in further detail below with reference to the drawings: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A front view of the anti-collision protection device of the automatic drilling and riveting equipment working head is provided.

[0020] Numbering in the figure: 1 pressure sensor protection strip, 2 signal processing module, 3 signal conversion module, 4 voltage conversion module, 5 mounting base.

[0021] Figure 2 The anti-collision protection device provided by the application is characterized in that: Figure 1 The exploded view of the pressure sensor protection strip.

[0022] Numbering in the figure: 1-1 pressure sensor protection layer, 1-2 thin-film pressure sensor, 1-3 rubber buffer layer, 1-4 back adhesive mounting layer.

[0023] Figure 3 The anti-collision protection device provided by the application is characterized in that: Figure 1 The partial view of the voltage processing module.

[0024] Figure 4 The application scenario of the application. DETAILED DESCRIPTION

[0025] Referring to the drawings, the anti-collision device provided by the application includes a pressure sensor protection strip 1, a signal processing module 2, a signal conversion module 3, a voltage conversion module 4, and a mounting base 5, wherein the signal processing module 2, the signal conversion module 3, and the voltage conversion module 4 are fixed on the mounting base 5.

[0026] The pressure sensor protection strip 1 is assembled by laminating and bonding a stainless steel thin-film surface protection layer 1-1, a thin-film long-strip pressure sensor layer 1-2, a rubber protection layer 1-3, and a back adhesive layer 1-4, and is pasted on the position of the equipment working head that may collide with the product by adhesive tape, wherein the nominal thickness of the rubber protection layer is 4 mm, which can meet the anti-collision buffer distance requirement under the running speed of most equipment, and the thickness can be adjusted but is not less than 2 mm.

[0027] Two pins on the thin-film long-strip pressure sensor layer 1-2 are connected to two pins of the signal input end of the signal processing module 2 through wires, one pin AO of the signal output end of the signal processing module 2 is connected to one pin IN+ of the signal input end of the signal conversion module 3 through wires, and one pin OUT of the signal output end of the signal conversion module 3 is connected to the equipment control system through wires.

[0028] The two input pins IN+ and IN- of the voltage conversion module 4 are connected to the device control system via wires, and to the two input pins VCC and IN- of the signal conversion module 3. The two output pins OUT+ and OUT- of the voltage conversion module 4 are connected to the power input pins VCC and GND of the signal processing module 2 via wires.

[0029] Through the above structure, the voltage conversion module 4 provides working voltage to the signal processing module 2 and the signal conversion module 3 respectively. The pressure signal of the pressure sensor protection strip 1 is processed by the signal processing module 2 and the signal conversion module 3 to form high and low level signal outputs, which are then connected to the equipment control system.

[0030] In use, multiple pressure sensor protection strips 1 can be affixed and installed on surfaces of the equipment's working head that may collide with the product. The signal output terminal of the signal conversion module 3 and the power input terminal of the voltage conversion module 4 are connected to the equipment control system. When the equipment's working head is about to collide with other structures, the pressure sensor protection strip 1 is first compressed and collapsed by the collision. The resistance trigger response threshold of the thin strip-shaped pressure sensor layer 1-2 decreases. Through the processing of the voltage detection circuit in the signal processing module 2, the change in resistance value can be converted into a change in voltage value, and a voltage signal is output to the signal conversion module 3. The signal conversion module 3, through the processing of the PNP type optocoupler isolation circuit, converts the voltage signal representing the pressure into a calibration voltage high / low level signal that the equipment controller can recognize. After receiving this signal, the equipment control system can control the equipment to immediately stop feeding and no longer move, preventing further collisions and achieving a collision protection effect.

[0031] This utility model discloses a collision protection device for the working head of an automatic drilling and riveting equipment, comprising a pressure sensor protection strip, a signal processing module, a signal conversion module, a voltage conversion module, and a mounting base. Referring to the accompanying drawings, a wire is connected to the pressure sensor protection strip to the signal processing module, a wire is connected to the signal processing module to the signal conversion module, and wires are connected to the signal processing module and the signal conversion module to the voltage conversion module. The signal processing module, the signal conversion module, and the voltage conversion module are fixed to the mounting base.

[0032] The pressure sensor protective strip is composed of an adhesive backing layer, a rubber protective layer, a thin strip-shaped pressure sensor layer, and a stainless steel sheet surface protective layer stacked sequentially.

[0033] The signal processing module obtains the operating voltage by connecting to the voltage conversion module via a wire, and obtains the pressure change signal by connecting to the pressure sensor via a wire. After being processed by the dual voltage comparator chip integrated circuit, the signal processing module outputs a voltage signal to the signal conversion module via a wire.

[0034] The signal conversion module obtains working voltage by connecting to the voltage conversion module through a wire, obtains voltage change signals by connecting to the signal processing module through a wire, and outputs pressure high-low level signals to the equipment controller through a wire after being processed by a PNP output type photo-coupler isolation chip integrated circuit.

[0035] The voltage conversion module obtains working voltage by connecting to the equipment PLC control circuit through a wire, outputs working voltage to the signal processing module through a wire after being processed by a step-down power management monolithic integrated circuit, and outputs working voltage to the signal conversion module through a wire.

[0036] The voltage conversion module voltage input end and the signal conversion module level output end are connected with the equipment PLC control circuit. When the equipment working head collides with the product, the product first squeezes the pressure sensor protection strip, voltage signals varying with pressure are generated, the detection signals of whether collision are fed back to the equipment through the signal processing and conversion module of the utility model, and the equipment can immediately enter the feeding stop state to stop moving and prevent further collision.

Claims

1. A collision protection device for the working head of an automatic drilling and riveting equipment, characterized in that, It comprises a pressure sensor protection strip (1), a signal processing module (2), a signal conversion module (3), a voltage conversion module (4) and a mounting base (5). The pressure sensor protection strip (1) is pasted on the position of the device work head that may collide with the product by adhesive tape. The pressure sensor protection strip (1) is connected to the signal processing module (2) through wires, the signal processing module (2) is connected to the signal conversion module (3) through wires, and the voltage conversion module (4) is connected to the signal processing module (2) and the signal conversion module (3) through wires.

2. The anti-collision protection device for the working head of the automatic drilling and riveting equipment according to claim 1, characterized in that, The pressure sensor protection strip (1) is assembled by laminating and bonding a stainless steel sheet surface protection layer (1-1), a sheet type long strip-shaped pressure sensor layer (1-2), a rubber protection layer (1-3) and a back adhesive layer (1-4).

3. The anti-collision protection device of the automatic drilling and riveting equipment head according to claim 2, characterized in that, Two pins on the sheet type long strip-shaped pressure sensor layer (1-2) are connected to two signal input pins of the signal processing module (2) through wires, one signal output pin AO of the signal processing module (2) is connected to one signal input pin IN+ of the signal conversion module (3) through wires, and one signal output pin OUT of the signal conversion module (3) is connected to the device control system through wires.

4. The anti-collision protection device for the working head of the automatic drilling and riveting equipment according to claim 1, characterized in that, Two input pins IN+, IN- of the voltage conversion module (4) are respectively connected to the device control system through wires, and are connected to two input pins VCC, IN- of the signal conversion module (3), and two output pins OUT+, OUT- of the voltage conversion module (4) are respectively connected to power input pins VCC, GND of the signal processing module (2) through wires.

5. The anti-collision protection device for the working head of the automatic drilling and riveting equipment according to claim 2, characterized in that, The thickness of the rubber protection layer is 2-4 mm.

6. The anti-collision protection device of the automatic drilling and riveting equipment head according to claim 4, characterized in that, The signal processing module (2) adopts a double-voltage comparator chip integrated circuit, the signal conversion module (3) adopts a PNP output type optical coupling isolation chip integrated circuit, and the voltage conversion module (4) adopts a step-down power management single chip integrated circuit.

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