A real-time detection device and method for workpiece surface grinding quality

Abstract

The present invention provides a device and method for real-time detection of workpiece surface grinding quality, comprising: a nozzle upper shell; a nozzle lower shell, which forms a sealed flow channel with the nozzle shell; a plurality of nozzles, each of which is arranged on the nozzle lower shell through a connecting pipe, the nozzle is located between the combined grinding wheels of the grinding assembly, the connecting pipe and the nozzle form a variable pressure chamber, the connecting pipe and the nozzle lower shell form a pressure stabilizing chamber; and a plurality of air pressure sensors, which are arranged in the nozzle, each of which is located in one of the variable pressure chambers, and the air pressure sensor is connected to the control system through a communication module. A device and method for real-time detection of workpiece surface grinding quality of the present invention, when low-temperature gas is output to the workpiece surface, there will be different pressure differences due to different roughness, the control system collects the real-time pressure difference through the air pressure sensor, and then analyzes and obtains the real-time grinding quality of the workpiece surface.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a real-time detection device and method for workpiece surface grinding quality. Background Art

[0002] Grinding technology is an important part of the mechanical manufacturing field. Grinding is crucial for parts of various materials with high precision and high quality requirements. Surface roughness value is one of the important indicators for evaluating the surface quality in grinding. However, it is difficult to detect this indicator in real time during grinding. Especially in end face grinding, there are large grinding forces and high grinding temperatures, which lead to poor surface quality of the ground workpiece.

[0003] There are two main methods for measuring surface roughness: contact measurement (such as stylus measurement) and non-contact measurement (such as optical measurement and acoustic emission measurement). Contact measurement is relatively simple, but it is difficult to achieve online measurement, and thus it is impossible to detect grinding quality in real time. The device structure and measurement method of optical measurement and acoustic emission measurement are relatively complex and costly. At the same time, the interference of other external light during the grinding process and the noise of the machine operation will affect the measurement results, so the requirements for working conditions during implementation are also relatively high. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a real-time detection device and method for workpiece surface grinding quality. When low-temperature gas is output onto the workpiece surface, different pressure differences will exist due to different roughness. The control system collects the real-time pressure difference through the air pressure sensor, and then analyzes and obtains the real-time grinding quality of the workpiece surface.

[0005] In order to achieve the above purpose, a technical solution adopted by the present invention is:

[0006] A real-time detection device for the surface grinding quality of a workpiece, comprising: an upper shell of a nozzle, connected to the bottom end of a flow channel shaft of a grinding assembly through a tubular base, a first air flow channel being arranged in the flow channel shaft; a lower shell of the nozzle, forming a sealed flow channel with the upper shell of the nozzle, the first air flow channel being communicated with the sealed flow channel; a plurality of nozzles, each of the nozzles being arranged on the lower shell of the nozzle through a connecting pipe, the nozzle being located between the combined grinding wheels of the grinding assembly, the connecting pipe and the nozzle forming a variable pressure chamber, the connecting pipe and the lower shell of the nozzle forming a stabilizing pressure chamber, each of the nozzles being provided with a second air flow channel, the second air flow channel being communicated with the variable pressure chamber, the variable pressure chamber being communicated with the stabilizing pressure chamber and the sealed flow channel in turn; and a plurality of air pressure sensors being arranged in the nozzles, each of the air pressure sensors being located in one of the variable pressure chambers, the air pressure sensors being connected to a control system through a communication module.

[0007] Furthermore, the nozzle upper shell includes the tubular base and the flow channel upper plate, the tubular base is arranged on the flow channel upper plate, the flow channel upper plate is provided with a flow channel hole, the upper end of the tubular base is connected to the bottom end of the flow channel shaft, the lower end of the tubular base is connected to the flow channel upper plate, and the inner hole of the tubular base is connected to the flow channel hole and the first air flow channel.

[0008] Furthermore, there are at least three nozzles distributed in a circular array on the lower shell of the nozzle.

[0009] Furthermore, the measurement accuracy of the air pressure sensor is greater than 0.1 MPa, and the sampling frequency of the air pressure sensor is the same as the rotation speed of the combined grinding wheel.

[0010] Furthermore, the nozzle diameter is 35-50 μm.

[0011] Furthermore, the pressure of the pressure-stabilizing gas source of the pressure-stabilizing chamber is 0.1-0.5 MPa, and the control accuracy is greater than 0.1 kPa.

[0012] Furthermore, the communication module is a wireless communication module.

[0013] The present invention also provides a method for real-time detection of workpiece surface grinding quality based on the above-mentioned device for real-time detection of workpiece surface grinding quality, comprising the following steps: S10 starts the grinding assembly, and the combined grinding wheel rotates at high speed; S20 controls the system to input gas through the first air flow channel of the flow channel shaft, and the gas is output to the surface of the workpiece in turn through the sealed flow channel, the pressure stabilizing chamber, the pressure transformer chamber and the second air flow channel; S30 as the surface roughness of the workpiece changes, the pressure data collected by the air pressure sensor in the pressure transformer chamber changes continuously; S40 the control system determines and obtains the real-time detection result of the workpiece surface roughness detection based on the pressure data.

[0014] The above technical solution of the present invention has the following advantages compared with the prior art:

[0015] (1) In a real-time detection device and method for the surface grinding quality of a workpiece of the present invention, gas is output to the surface of the workpiece through a sealed flow channel, a pressure stabilizing chamber, a pressure changing chamber and a second air flow channel in sequence. Due to the different roughness of the workpiece surface, there are different high and low points in the microstructure. When low-temperature gas is output to the surface of the workpiece, there will be different pressure differences due to the different roughness. The control system collects the real-time pressure difference through the air pressure sensor, and then analyzes and obtains the real-time grinding quality of the workpiece surface.

[0016] (2) The present invention provides a device and method for real-time detection of workpiece surface grinding quality. During the real-time detection of grinding quality, low-temperature air can be used to collect trace fluid pressure differences to detect the grinding surface, and can also effectively cool the grinding surface to further improve the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solutions and beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 Shown is a cross-sectional view of a grinding assembly according to an embodiment of the present invention;

[0019] Figure 2 Shown is a structural diagram of a grinding assembly according to an embodiment of the present invention;

[0020] Figure 3 The figure shows a structural diagram of a device for real-time detection of workpiece surface grinding quality according to an embodiment of the present invention.

[0021] 1 nozzle upper shell, 11 tubular base, 12 flow channel upper plate, 2 nozzle lower shell, 3 sealed flow channel, 4 grinding assembly, 41 combined grinding wheel, 42 flow channel shaft, 43 first air flow channel, 5 nozzle, 51 second air flow channel, 6 connecting pipe, 7 variable pressure chamber, 8 air pressure sensor, 9 pressure stabilizing chamber. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] This embodiment provides a device for real-time detection of workpiece surface grinding quality. Figures 1 to 3 As shown, it includes a nozzle upper shell 1, a nozzle lower shell 2, a plurality of nozzles 5 and a plurality of air pressure sensors 8, the nozzle upper shell 1 is connected to the flow channel axis 42, the nozzle lower shell 2 and the nozzle upper shell 1 form a sealed flow channel 3, the first air flow channel 43 is connected to the sealed flow channel 3, each of the nozzles 5 is arranged on the nozzle lower shell 2 through a connecting pipe 6, and each of the air pressure sensors 8 is arranged in one of the nozzles 5.

[0024] The upper shell 1 of the nozzle is connected to the bottom end of the flow channel shaft 42 of the grinding assembly 4 through the tubular base 11, and the flow channel shaft 42 is provided with a first air flow channel 43. The upper shell 1 of the nozzle includes the tubular base 11 and the flow channel upper plate 12, the tubular base 11 is arranged on the flow channel upper plate 12, the flow channel upper plate 12 is provided with a flow channel hole, the upper end of the tubular base 11 is connected to the bottom end of the flow channel shaft 42, the lower end of the tubular base 11 is connected to the flow channel upper plate 12, and the inner hole of the tubular base 11 is connected to the flow channel hole and the first air flow channel 43.

[0025] The nozzle 5 is located between the combined grinding wheels 41 of the grinding assembly 4, the connecting pipe 6 and the nozzle 5 form a variable pressure chamber 7, the connecting pipe 6 and the nozzle lower shell 2 form a stabilizing chamber 9, each of the nozzles 5 is provided with a second air flow channel 51, the second air flow channel 51 is connected to the variable pressure chamber 7, and the variable pressure chamber 7 is connected to the stabilizing chamber 9 and the sealing flow channel 3 in turn. Each of the air pressure sensors 8 is located in a variable pressure chamber 7, and the air pressure sensor 8 is connected to the control system through a communication module. The communication module is preferably a wireless communication module.

[0026] There are at least three nozzles 5 distributed in a circular array on the nozzle lower housing 2, and the user can set the number of nozzles 5 according to the requirements of detection accuracy. The diameter of the nozzle 5 is 35-50 μm.

[0027] The measurement accuracy of the air pressure sensor 8 is greater than 0.1 MPa, and the sampling frequency of the air pressure sensor 8 is the same as the rotation speed of the combined grinding wheel 41. The pressure of the pressure stabilizing air source of the pressure stabilizing chamber 9 is 0.1-0.5 MPa, and the control accuracy is greater than 0.1 kPa.

[0028] The present invention also provides a method for real-time detection of workpiece surface grinding quality based on the above-mentioned device for real-time detection of workpiece surface grinding quality, comprising the following steps: S10 Start the grinding assembly 4, and the combined grinding wheel 41 rotates at high speed. S20 The control system inputs low-temperature gas through the first air flow channel 43 of the flow channel shaft 42, and the gas is output to the surface of the workpiece through the sealed flow channel 3, the pressure stabilizing chamber 9, the pressure changing chamber 7 and the second air flow channel 51 in turn. S30 As the surface roughness of the workpiece changes, the pressure data collected by the air pressure sensor 8 in the pressure changing chamber 7 changes continuously. S40 The control system obtains the real-time detection result of the workpiece surface roughness detection based on the pressure data.

[0029] The above description is only an exemplary embodiment of the present invention, and does not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A real-time detection device for workpiece surface grinding quality, characterized in that: include: The nozzle upper shell (1) is connected to the bottom end of the flow channel shaft (42) of the grinding assembly (4) through a tubular base (11), and a first air flow channel (43) is provided in the flow channel shaft (42); the nozzle lower shell (2) forms a sealed flow channel (3) with the nozzle upper shell (1), and the first air flow channel (43) is connected to the sealed flow channel (3); a plurality of nozzles (5), each of which is arranged on the nozzle lower shell (2) through a connecting pipe (6), and the nozzles (5) are located between the combined grinding wheels (41) of the grinding assembly (4), and the connecting pipe (6) ) and the nozzle (5) form a variable pressure chamber (7), the connecting pipe (6) and the nozzle lower shell (2) form a stabilizing pressure chamber (9), each of the nozzles (5) is provided with a second air flow channel (51), the second air flow channel (51) is connected to the variable pressure chamber (7), the variable pressure chamber (7) is connected to the stabilizing pressure chamber (9) and the sealing flow channel (3) in sequence; and a plurality of air pressure sensors (8) are arranged in the nozzle (5), each of the air pressure sensors (8) is located in one of the variable pressure chambers (7), and the air pressure sensors (8) are connected to the control system via a communication module; The nozzle upper shell (1) comprises the tubular base (11) and a flow channel upper plate (12); the tubular base (11) is arranged on the flow channel upper plate (12); a flow channel hole is provided on the flow channel upper plate (12); the upper end of the tubular base (11) is connected to the bottom end of the flow channel shaft (42); the lower end of the tubular base (11) is connected to the flow channel upper plate (12); and the inner hole of the tubular base (11) is in communication with the flow channel hole and the first air flow channel (43); There are at least three nozzles (5) distributed on the nozzle lower housing (2) in a circular array; The gas output to the surface of the workpiece through the sealed flow channel (3), the pressure stabilizing chamber (9), the pressure changing chamber (7), and the second air flow channel (51) is low-temperature air.

2. The device for real-time detection of workpiece surface grinding quality according to claim 1, characterized in that: The measurement accuracy of the air pressure sensor (8) is greater than 0.1 Mpa, and the sampling frequency of the air pressure sensor (8) is the same as the rotation speed of the combined grinding wheel (41).

3. The device for real-time detection of workpiece surface grinding quality according to claim 1, characterized in that: The nozzle (5) has a diameter of 35 to 50 μm.

4. The device for real-time detection of workpiece surface grinding quality according to claim 1, characterized in that: The pressure of the pressure-stabilizing gas source of the pressure-stabilizing chamber (9) is 0.1-0.5 MPa, and the control accuracy is greater than 0.1 kPa.

5. The device for real-time detection of workpiece surface grinding quality according to claim 1, characterized in that: The communication module is a wireless communication module.

6. The method for real-time detection of workpiece surface grinding quality of the device for real-time detection of workpiece surface grinding quality according to claim 1, characterized in that: The method comprises the following steps: S10 starting a grinding assembly (4) and rotating a combined grinding wheel (41) at high speed; S20 a control system inputting low-temperature gas through a first air flow channel (43) of a flow channel shaft (42), and the gas is output to the surface of a workpiece through a sealing flow channel (3), a pressure stabilizing chamber (9), a pressure changing chamber (7) and a second air flow channel (51) in sequence; S30 as the surface roughness of the workpiece changes, the pressure data collected by the air pressure sensor (8) in the pressure changing chamber (7) continuously changes; and S40 the control system determines and obtains a real-time detection result of the workpiece surface roughness detection based on the pressure data.

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