CN111941224B

CN111941224B - Mirka AOS-B-II type hand-held polishing equipment

Info

Publication number: CN111941224B
Application number: CN202010861339.6A
Authority: CN
Inventors: 刘欢; 崔博文; 王俊尧; 孙功臣; 陈星宇; 李云鹏; 郎天鸿; 王锐
Original assignee: Northeast Dianli University
Current assignee: Northeast Electric Power University
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2022-03-04
Anticipated expiration: 2040-08-25
Also published as: CN111941224A

Abstract

The invention discloses a front end device of a novel handheld automobile polishing machine, belongs to the field of handheld electric tools, and aims to solve the problem that polishing pressure, polishing surface temperature and rotation torque (rotation speed) are difficult to control in the manual operation process of the conventional Mirka AOS-B polishing equipment. The front end of the handheld automobile polishing machine comprises a device shell, a torque motor arranged in the shell and a polishing component driven by the motor. The polishing assembly comprises a driving part, a rotating part and a weight part, when the weight part is stressed too much, a pressure sensor at the front end of the weight part acquires an electric signal and controls a torque motor after being processed by a lower computer system, the torque motor transmits residual load to the driving part through a rotating device, a spring is arranged at the front end of the driving part, the spring is compressed, and force unloading is completed. Compared with the existing handheld automobile polishing machine, the equipment provided by the invention is low in operation difficulty and good in polishing quality.

Description

Mirka AOS-B-II type hand-held polishing equipment

Technical Field

The invention relates to the field of automobile processing, in particular to novel handheld automobile polishing equipment

Background

A hand-held automobile polishing machine is a hand-held metal surface polishing device and mainly aims to make up for the fine defects of paint film surfaces such as coarse grains, sand paper marks, flow marks, white reflection, orange peel and the like which can appear on the automobile surface after spraying. However, the type of the existing handheld polishing machine is single, and mainly a motor and a single-shaft combined polishing wheel are used for polishing, so that the problem that polishing pressure, polishing surface temperature and rotation torque (rotating speed) are difficult to control in the manual operation process cannot be solved. Chinese patent No. CN109434641A discloses a name: "an automobile burnishing and polishing machine of adjustable diameter of polishing", its shortcoming is: there is no automated control of pressure, temperature. In summary, the prior art suffers from deficiencies in achieving pressure, temperature and torque control, such that more and more customers are seeking better specialized sanding and polishing tool solutions.

Disclosure of Invention

Aiming at the existing technical problems, the invention provides novel handheld polishing equipment which is simple in structure, convenient to install and debug, low in operation difficulty and good in polishing quality.

The technical scheme adopted by the invention is as follows: it is characterized in that it comprises: the device comprises a shell, a driving part, a rotating part, a counterweight part and a torque motor. The shape of the shell is a cylinder, from the perspective of pressure uniformity, 3 groups of miniature force unloading units are adopted in the shell, and the miniature force unloading units are uniformly arranged on the shell of the device at 120 degrees. Each group of force unloading units is provided with two balance weight plates with racks, a gear is arranged between the two balance weight plates and driven by a torque motor so as to achieve the lifting effect, a spring is arranged below one of the balance weight plates, and a transmission device is arranged below the other balance weight plate so as to achieve the lifting effect. When pressure is applied, the sensor can acquire signals, the driving device and the counterweight device form reverse actions through control processing of the lower computer, and the counter acting force generated by the driving device and the reverse actions generated by the counterweight device are mutually offset through anticlockwise rotation.

The innovation points of the equipment of the invention are mainly as follows:

(1) in order to realize accurate control of pressure, temperature and torque, three sensors with high precision, high sensitivity and low hysteresis are respectively adopted for data acquisition and corresponding signal processing modules are designed;

(2) in order to realize high integration of control, a lower computer system is developed to realize automatic control of 5G network communication, temperature, pressure and torque

(3) In order to obtain the optimal use parameters, a plurality of groups of data models are determined through manual operation experience, and simulation analysis under different models is carried out;

(4) based on the optimal parameters, PCB design and programming of upper and lower computers are carried out, and the pressure control, temperature control and torsion control (speed) precision of the Mirka AOS-B-II type hand-held polishing equipment is tested.

Drawings

FIG. 1 is a schematic mechanical diagram of a Mirka AOS-B-II type hand-held polishing device

FIG. 2 is a schematic diagram of the front end device of the Mirka AOS-B-II type hand-held polishing apparatus

FIG. 3 is an enlarged schematic view of a force-releasing device of Mirka AOS-B-II type hand-held polishing equipment

FIG. 4 is a schematic diagram of the overall control of a Mirka AOS-B-II type hand-held polishing apparatus

In the figure: a driving part 1, a rotating part 2, a counterweight part 3, a torque motor 4, a device shell 5, a spring 6, a sensor fixing block 7 and a backing plate 8,

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The figures are simplified schematic diagrams only illustrating the basic structure of the invention in a schematic way

As shown in fig. 1, fig. 2 and fig. 3, the front end device of the novel handheld automobile polishing machine of the present invention comprises: the device comprises a driving part 1, a rotating part 2, a counterweight part 3, a torque motor 4 and a device shell 5.

The shell 5 is cylindrical, 3 groups of micro force unloading units are adopted in the shell from the viewpoint of pressure uniformity, and the micro force unloading units are uniformly arranged on the shell of the device at 120 degrees. Each group of force unloading units is provided with two balance weight plates 3 with racks, a gear is arranged between the two balance weight plates and driven by a torque motor 4 so as to achieve the lifting action, a spring 6 is arranged below one of the balance weight plates 3, and a sensor fixing block 7 is arranged below the other balance weight plate.

When the stress of the weight part 3 is overlarge, a pressure sensor at the front end of the weight part collects an electric signal, the electric signal is processed by a lower computer system to control the torque motor 4, the torque motor 4 transmits the residual load to the driving part 1 through the rotating part 2, the front end of the driving part is provided with a spring, the spring is compressed, and the force unloading is completed.

As shown in fig. 3, which is a schematic structural diagram of the force-releasing device, the rotating member 2 is a circular wheel body, and the rotating member 2 is provided with a pivoting member and a tooth-engaging portion surrounding the pivoting member. Wherein the rotating member 2 rotates around the pivot member, and the engaging teeth are linked by the first driving portion of the driving member. Each group of power-off units is provided with two cuboid weight plates, the weight plates are respectively arranged on two sides of the rotating part, one end of each weight plate is provided with a second driving part in the shape of a wavy tooth, and the second driving part is meshed with the tooth-meshing part of the rotating part. The spring is a coil spring or a ring spring, and has the function of consuming external force impact and vibration.

As shown in fig. 4, which is a schematic diagram of the overall control of the hand-held polishing apparatus, the lower computer system (integrated control) integrates a 5G communication module, a core control module, a main motion control module, a force-releasing motion control module, a signal processing module and a sensor set. A core control module in the system adopts an ARM-structured high-performance singlechip to complete the motion control of a main motion rotating speed control and a force unloading device, and simultaneously processes and converts temperature, pressure and torque (rotating speed) signals to complete data acquisition and communication of a sensor group; and the upper computer system completes the monitoring of the running state of the equipment through the 5G communication module. It includes: the method comprises the following steps of polishing surface temperature monitoring, equipment working pressure monitoring, polishing wheel rotating speed detection, running time display, equipment model identification and operator identity confirmation.

Considering the surface temperature of the vehicle paint polishing, the temperature range is narrow, and the thermal resistor is used as a temperature sensor for measuring the local temperature of the polished surface; the working pressure and the comprehensive rotating speed of the polishing machine are comprehensively considered, and the working pressure of the polishing wheel is measured by adopting the piezoresistive sensor. Considering that the type of the measured torque is the rotating torque and the rotating speed is moderate, a torque sensor with standard measuring range and the output signal of the torque sensor is a frequency signal is adopted.

The working principle is as follows: the moving body of the polishing gun is held by hand first, and the automobile shell is ground and polished by opening the interior of the polishing gun and the motor of the front-end device. The rotary disk under the device is enabled to move downwards through downward force application before polishing, and the front-end device can generate certain air pressure adsorption when an operator operates the device through the circular hollow part of the device, so that the main body can be better adsorbed on the automobile shell. Through the collection of the sensor and the related detection of the equipment, the automatic control of pressure, temperature and torque is realized.

The above is a preferred example of the present invention, and various changes and modifications can be made by those skilled in the art within the technical spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

A Mirka AOS-B-II handheld polishing device front end device, characterized by comprising: the device comprises a device shell, a lower computer system and a force unloading device; the front-end device lower computer system integrates a 5G communication module, a core control module, a main motion control module, a force unloading motion control module, a signal processing module and a sensor group; the device shell is cylindrical, and from the viewpoint of pressure uniformity, the force unloading device arranged in the device shell comprises 3 groups of micro force unloading units, and the 3 groups of micro force unloading units are uniformly arranged on the device shell at 120 degrees; each group of miniature force unloading units comprises a first counterweight plate, a second counterweight plate and a second wavy toothed driving piece, wherein the outer surface of each miniature force unloading unit is provided with a threaded sleeve structure, a fixing hole in threaded fit with the miniature force unloading unit is formed in the device shell, a screw penetrates through the lower part of the miniature force unloading unit and is connected with the device shell, a spring is arranged below one end of the first counterweight plate, a lower machine system is arranged below the second counterweight plate, a rotating piece is arranged between the first counterweight plate and the second counterweight plate, the rotating piece is a circular wheel body and comprises a pivoting piece and a toothed meshing part, the rotating piece is driven by a torque motor and rotates by taking the pivoting piece as the center, and the meshing part is in meshing transmission with the second wavy toothed driving piece; when the working pressure used by an operator for polishing exceeds the preset pressure, the second counterweight plate can transmit redundant force to the sensor group, signals are transmitted to the torque motor through the control processing of the lower computer system, the torque motor controls the rotating part to be meshed with the second driving part for transmission, and the force acting on the second counterweight plate and the reverse acting force generated by the spring connected with the first counterweight plate are mutually offset through anticlockwise rotation.
2. The hand-held polishing apparatus front-end device of claim 1, characterized in that: a core control module in the lower computer system adopts an ARM-architecture high-performance singlechip to complete the motion control of the main motion rotating speed control and the force unloading device, so that the upper computer system completes the monitoring of the equipment operation condition through a 5G communication module, and a torque sensor and a thermal resistance sensor are arranged in the front-end device; the thermal resistance sensor is used for measuring the local temperature of the polishing surface, the torque sensor is used as a standard measuring range, and the output signal is a frequency signal to measure the working pressure of the polishing wheel.
3. The hand-held polishing apparatus front-end device of claim 1, characterized in that: the spring is a coil spring or a ring spring, and has the function of consuming external force impact and vibration.
4. The hand-held polishing apparatus front-end device of claim 1, characterized in that: the diameter of the device housing is at least 15 cm.
5. The hand-held polishing apparatus front-end device of claim 1, characterized in that: the front end device is provided with a shaft part, the shaft part sequentially penetrates through the gasket and the bearing, and the nut is screwed into the thread of the shaft part to arrange the device on the installation part of the polishing gun.
6. The hand-held polishing apparatus front end as recited in claim 1, comprising the steps of:

holding a moving body of the polishing gun by hand, and grinding and polishing the automobile shell by opening the interior of the polishing gun and a torque motor of the front-end device; the rotating disc under the device moves downwards by applying a downward force before polishing, and the front end device generates certain air pressure adsorption when an operator operates the device through the circular hollow part of the device, so that the main body can be better adsorbed on the shell of the automobile; through the collection of the sensor and the related detection of the equipment, the automatic control of pressure, temperature and torque is realized.