CN112123169A - An intelligent polishing machine and its constant pressure polishing operation method - Google Patents

Abstract

The invention discloses an intelligent polishing machine, comprising a frame, the frame is provided with a driving mechanism, the driving mechanism includes a polishing wheel and a driving motor for driving the polishing wheel to rotate, the frame further includes a floating adjustment mechanism and a compensation mechanism, and the floating adjustment mechanism includes The fixed seat, the movable arm and the pneumatic push rod, the movable arm and the fixed seat are rotatably connected by the connecting rod, the polishing wheel and the driving motor are set on the movable arm, the pneumatic push rod is set on the fixed seat, and the connecting rod and the pneumatic push rod can be connected by touch; The compensation mechanism includes a guide rail, and the fixed seat and the guide rail are slidably connected. The invention also discloses a constant-pressure polishing operation method, which adjusts the rotational speed of the motor according to the wear law to gradually increase the linear speed of the polishing wheel and achieves the function of compensating for the wear of the polishing wheel. The invention forms the floating pressure and the thrust from the workpiece to balance and offset each other, so as to achieve a constant grinding pressure. The constant pressure polishing operation method of the present invention can ensure constant cutting efficiency, thereby ensuring polishing quality.

Description

An intelligent polishing machine and its constant pressure polishing operation method

technical field

The invention relates to the technical field of metal polishing, in particular to an intelligent polishing machine and a constant pressure polishing operation method thereof.

Background technique

The polishing machine includes a motor and a frame. The motor drives the polishing wheel to move, and the workpiece to be polished contacts and rubs with the moving polishing wheel, thereby completing the grinding or polishing of the surface of the workpiece. In the manufacturing process of metal cups and pots, there are basically welding seams on the surface. Before entering the market, the metal surface needs to be polished. At present, the polishing work is mainly carried out manually. Due to the different polishing strengths of different operators, constant pressure polishing cannot be achieved. Therefore, the surface smoothness of the obtained products is different, and a slight mistake by the operator may cause irreparable operations on the surface of the metal cup and pot, which greatly affects the quality of the product. Moreover, during the polishing process, a large amount of dust will be generated and float in the environment, which greatly endangers the health of operators. With the popularization of automated production, manual operations have disadvantages such as low efficiency and unfavorable cost savings for enterprises.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide an intelligent polishing machine that keeps the contact force between the workpiece and the polishing wheel constant.

The purpose of the present invention adopts following technical scheme to realize:

An intelligent polishing machine includes a frame, the frame is provided with a driving mechanism, the driving mechanism includes a polishing wheel and a driving motor for driving the polishing wheel to rotate, and the frame further includes a floating adjustment mechanism and a compensation mechanism, The floating adjustment mechanism includes a fixed seat, a movable arm and a pneumatic push rod, the movable arm and the fixed seat are rotatably connected by a connecting rod, the polishing wheel and the driving motor are arranged on the movable arm, and the pneumatic The push rod is arranged on the fixed seat, and the connecting rod and the pneumatic push rod can be connected by touch; the compensation mechanism includes a guide rail, and the fixed seat and the guide rail are slidably connected.

Further, the fixing plate is provided with a bearing, and the connecting rod is rotatably connected with the bearing.

Further, the floating adjustment mechanism further includes a counterweight module, and the counterweight module is arranged on the movable arm or the connecting rod.

Further, the compensation mechanism further includes a pressure sensor, a compensation motor, a gear and a rack, the compensation motor drives the gear to rotate, the gear meshes with the rack, and the pressure sensor detects the pneumatic push rod and the connecting rod.

Further, the rack is further provided with a cooling mechanism, the cooling mechanism includes a spray pump and a spray nozzle, and the spray nozzle is connected to the spray pump.

Further, the frame further includes an exhaust fan, and the exhaust fan is arranged opposite to the working wheel.

The present invention also provides a constant pressure polishing operation method of an intelligent polishing machine, comprising the following steps:

(1) Set an initial speed for the drive motor according to the material of the workpiece to be polished and the process parameters of the polishing wheel, and measure the initial pressure between the workpiece and the polishing wheel at the same time;

(2) Keep measuring the pressure between the workpiece and the polishing wheel during the polishing process, and compare the measured pressure with the initial pressure; calculate the difference between the measured pressure and the initial pressure;

(3) Adjust the rotational speed of the drive motor, increase the linear speed of the polishing wheel, and make the measurement pressure equal to the initial pressure;

(4) Establish a mathematical model library to record the changing process of the rotational speed of the driving motor, and adjust the rotational speed of the driving motor according to time during the polishing operation.

Compared with the prior art, the beneficial effects of the present invention are:

(1) Using the floating feature of the movable arm, the counterweight module and the pneumatic push rod are introduced at the same time, so that the floating pressure and the thrust from the workpiece are balanced and offset each other, so as to achieve a constant grinding pressure.

(2) According to the wear law of the polishing wheel, a corresponding mathematical model library is established to ensure constant cutting efficiency and improve the service life of the polishing wheel.

(3) The cooling mechanism is introduced. During the polishing process, the cooling system cools the surface of the product and improves the original phenomenon of burns on the surface of the product due to high temperature.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the polishing station of the present invention;

Figure 3 is a rear view of the polishing station of the present invention;

Figure 4 is a schematic structural diagram of the transmission components of the compensation mechanism.

In the figure: 10, frame; 20, polishing wheel; 21, movable arm; 22, fixed seat; 23, connecting rod; 24, drive motor; 25, pneumatic push rod; 26, bearing; 27, counterweight module; 30 , Bottom connecting beam; 31, compensation motor; 32, gear; 33, rack; 34, guide rail; 35, slider; 40, exhaust fan.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise of no conflict, the embodiments or technical features described below can be combined arbitrarily to form new embodiments. .

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the present invention discloses an intelligent polishing machine, which includes a frame 10 , and the frame 10 is provided with a driving mechanism. In this embodiment, the frame 10 is provided with two groups of driving mechanisms, each group of driving mechanisms corresponds to one station, and the two groups of stations have the function of fast switching of single station or multi-station. Each set of driving mechanisms includes a polishing wheel 20 and a driving motor 24 for rotating the polishing wheel 20, and the driving motor 24 is a servo motor.

In the present invention, the frame 10 also has a floating adjustment mechanism. The floating adjustment mechanism includes a fixed base 22 and a movable arm 21. The fixed base 22 is fixed inside the frame 10, the movable arm 21 is movably connected with the fixed base 22, and the polishing wheel 20 is arranged on the One end of the movable arm 21 . The movable arm 21 is hollow inside, the drive motor 24 is fixed to the movable arm 21 and its output shaft is inserted inside the movable arm 21 , and the output shaft is connected to the polishing wheel 20 through a conveyor belt for transmission. The fixed seat 22 is provided with a bearing 26 , the movable arm 21 includes a connecting rod 23 , and the connecting rod 23 is rotatably connected with the bearing 26 . The swing arm mechanism further includes a counterweight module 27 . The counterweight module 27 is used to increase the stability of the movable arm 21 , and the counterweight module 27 is arranged on the movable arm 21 or the connecting rod 23 . The floating adjustment mechanism also includes a pneumatic push rod 25. The pneumatic push rod 25 is arranged on the fixed seat 22. When the workpiece to be polished touches the polishing wheel 20, the generated thrust pushes the entire movable arm 21 and the connecting rod 23 in the thrust direction. The push rod 25 keeps pushing out, and when the connecting rod 23 is pushed to the pneumatic push rod 25, the floating thrust and the thrust from the workpiece balance and offset each other, so as to achieve a constant grinding pressure. A constant grinding pressure has the advantage of more stable control and better grinding quality for the polished workpiece.

In the present invention, as shown in FIG. 3 and FIG. 4, the compensation mechanism includes a pressure sensor, a guide rail 34, a compensation motor 31, a gear 32, a rack 33 and a bottom connecting beam 30, and the gear 32, the rack 33 and the guide rail 34 are arranged at the bottom The connecting beam 30 and the guide rail 34 are provided with a slidable sliding block 35 , and the bottom connecting beam 30 is fixed inside the frame 10 . The compensation motor 31 is arranged on the fixed base 22 , and the output shaft of the compensation motor 31 is passed through the bottom connecting beam 30 and connected to the gear 32 . The gear 32 meshes with the rack 33 , and the compensation motor 31 drives the gear 32 to rotate. The rack 33, the fixed seat 22 and the slider 35 are screwed to form an integral structure. The pressure sensor detects the pressure between the pneumatic push rod 25 and the connecting rod 23 . When the pressure sensor detects no signal, the compensation mechanism will start feeding. When the compensation motor 31 is started, the gear 32 rotates and drives the rack 33 to move horizontally, and the entire station including the fixed seat 22 on the guide rail 34 can move horizontally. Therefore, the distance between the polishing wheel 20 and the workpiece is compensated, and the operation is stopped until the pressure sensor has a detection signal input.

During polishing production, if the dust and metal debris cannot be handled in time, it will easily cause pollution to the work station and affect the service life of the polishing machine. Moreover, when the polishing wheel 20 is in contact with the workpiece, a large amount of heat is easily generated due to friction. The temperature of the work station inside the frame 10 will increase sharply when the frame 10 is operated for a long time, which will affect the grinding quality. Therefore, in the present invention, the rack 10 is further provided with a cooling mechanism and an exhaust fan 40, the cooling mechanism includes a spray pump and a spray nozzle, the spray nozzle is connected to the spray pump, and the spray nozzle is arranged inside the rack 10, but the position of its setting is It is not fixed, it can be arranged on the top of the rack 10, or it can be arranged on the side wall of the rack 10 or in the exhaust fan 40, just align the spraying direction of the spray nozzle with each station in the rack 10, through the nozzle The generated water mist cools the workstation. The exhaust fan 40 is arranged opposite to the polishing wheel 20 , and the exhaust fan 40 forms an air duct inside the rack 10 to blow to the outside.

The present invention also provides a constant pressure polishing operation method of an intelligent polishing machine, comprising the following steps:

(1) In order to keep the polishing wheel 20 constant-pressure polishing, when the surface of the polishing wheel 20 is worn out, the linear speed of the polishing wheel 20 can be increased by increasing the rotational speed of the driving motor 24 to compensate for it. To obtain the compensated linear velocity, firstly, data collection is performed on the wear and tear of the polishing wheel 20 , an initial rotational speed is set for the drive motor 24 according to the material of the workpiece to be polished and the process parameters of the polishing wheel 20 , and the distance between the workpiece and the polishing wheel 20 is measured at the same time. The initial pressure between; polishing at this initial speed;

(2) During the polishing process, keep measuring the pressure between the workpiece and the polishing wheel 20, and compare the measured pressure with the initial pressure; calculate the difference between the measured pressure and the initial pressure;

(3) When the measurement pressure becomes small, adjust the rotational speed of the drive motor 24 to increase the linear speed of the polishing wheel 20 movement, so that the measurement pressure is increased to the value of the initial pressure;

(4) Record the change process of the rotational speed of the driving motor 24 and establish a mathematical model library of the relationship between the rotational speed of the driving motor 24 and time. According to the measured pressure at a certain time node, the initial pressure changes, and the rotational speed of the driving motor 24 is correspondingly increased. In batch operation, the rotational speed of the driving motor 24 can be adjusted according to time during the polishing operation directly according to the data of the mathematical model library, and there is no need to re-collect the pressure data.

The above-mentioned embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (7)

1. An intelligent polishing machine, comprising a frame, the frame is provided with a driving mechanism, the driving mechanism comprises a polishing wheel and a drive motor that drives the polishing wheel to rotate, it is characterized in that: the frame also includes a floating Adjustment mechanism and compensation mechanism, the floating adjustment mechanism includes a fixed seat, a movable arm and a pneumatic push rod, the movable arm and the fixed seat are rotatably connected by a connecting rod, and the polishing wheel and the driving motor are arranged on the In the movable arm, the pneumatic push rod is arranged on the fixed seat, and the connecting rod and the pneumatic push rod can be connected by touch; the compensation mechanism includes a guide rail, and the fixed seat and the guide rail are slidably connected. 2 . The intelligent polishing machine according to claim 1 , wherein the fixing plate is provided with a bearing, and the connecting rod is rotatably connected with the bearing. 3 . 3 . The intelligent polishing machine according to claim 2 , wherein the floating adjustment mechanism further comprises a counterweight module, and the counterweight module is arranged on the movable arm or the connecting rod. 4 . 4. The intelligent polishing machine according to claim 1, wherein the compensation mechanism further comprises a compensation motor, a gear, a pressure sensor and a rack, the compensation motor drives the gear to rotate, and the gear and the The rack is engaged, and the pressure sensor detects the pressure between the pneumatic push rod and the connecting rod. 5 . The intelligent polishing machine according to claim 1 , wherein the frame is further provided with a cooling mechanism, and the cooling mechanism comprises a spray pump and a spray nozzle, and the spray nozzle is connected to the spray pump. 6 . 6 . The intelligent polishing machine according to claim 1 , wherein the frame further comprises an exhaust fan, and the exhaust fan is arranged opposite to the working wheel. 7 . 7. A constant pressure polishing operation method of an intelligent polishing machine, characterized in that, comprising the following steps: (1) Set an initial speed for the drive motor according to the material of the workpiece to be polished and the process parameters of the polishing wheel, and measure the initial pressure between the workpiece and the polishing wheel at the same time; (2) Keep measuring the pressure between the workpiece and the polishing wheel during the polishing process, and compare the measured pressure with the initial pressure; calculate the difference between the measured pressure and the initial pressure; (3) Adjust the rotational speed of the drive motor, increase the linear speed of the polishing wheel, and make the measurement pressure equal to the initial pressure; A mathematical model library is established to record the changing process of the rotational speed of the driving motor, and the rotational speed of the driving motor is adjusted according to time during the polishing operation.

Images