Intelligent sanding belt machine and constant pressure polishing operation method thereof

Abstract

The present invention discloses an intelligent belt sander, comprising a frame, the frame is provided with a driving mechanism, the driving mechanism comprises more than two working wheels and a driving motor for driving the working wheels to rotate, the frame also comprises a swing arm mechanism, the swing arm mechanism comprises a fixed plate, a floating cylinder and a movable arm, the fixed plate is fixed to the frame, the movable arm is movably connected to the fixed plate, the working wheel is arranged on the movable arm, and the floating cylinder limits the range of motion of the movable arm. The intelligent belt sander of the present invention adopts a constant pressure polishing operation method, by obtaining the wear law of the belt, and then adjusting the rotation speed of the motor according to the wear law to gradually increase the linear speed of the belt, so as to achieve the function of belt wear compensation. The present invention adopts a floating movable arm, and at the same time introduces a counterweight module, and uses a floating cylinder to form a floating pressure that balances and offsets the thrust of the workpiece, thereby achieving a constant grinding pressure. The constant pressure polishing operation method of the present invention can ensure a constant cutting efficiency, thereby improving the service life of the belt.

Description

Technical Field

[0001] The invention relates to the technical field of metal polishing, and in particular to an intelligent abrasive belt machine and a constant-pressure polishing operation method thereof. Background Art

[0002] The belt sander includes a sanding belt, a motor, a frame, and a belt roller. The sanding belt is tensioned in the belt roller. The motor drives one of the belt rollers to move. The sanding belt moves with the belt roller. The workpiece to be polished contacts and rubs against the moving sanding belt, thereby completing the grinding or polishing of the workpiece surface. Especially in the production process of cups and pots, a belt sander is usually used to grind the welds on the metal surface of cups and pots.

[0003] However, during the automatic polishing process of cups and pots, the sanding belt will come into contact with the metal surface due to high-speed rotation during polishing and produce certain wear. Since the sanding belt will be worn out during the polishing process, the polishing pressure will usually change after the sanding belt is worn out, thus affecting the stability of the polishing quality. In actual production, polishing operations are usually performed manually. The operator senses the contact force between the metal surface and the sanding belt by hand, and observes the actual working condition of the polishing surface with the naked eye at the same time, and adjusts the pressure applied to the workpiece by hand in time. However, in work sites with serious metal dust pollution, it is easy to have a negative impact on the health of workers. In addition, with the popularization of automated production, manual operations have the disadvantages of low efficiency and are not conducive to cost savings for enterprises. Summary of the invention

[0004] In order to solve the above-mentioned problem, an object of the present invention is to provide an intelligent abrasive belt machine which can keep the contact force between the workpiece and the abrasive belt constant.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] An intelligent belt sander comprises a frame, the frame is provided with a driving mechanism, the driving mechanism comprises more than two working wheels and a driving motor for driving the working wheels to rotate, the frame also comprises a swing arm mechanism, the swing arm mechanism comprises a fixed plate and a movable arm, the fixed plate is fixed to the frame, the movable arm is movably connected to the fixed plate, the working wheel is arranged on the movable arm, and the floating cylinder limits the movable range of the movable arm.

[0007] Furthermore, the fixed plate is provided with a bearing, the movable arm comprises a connecting rod, the connecting rod is rotatably connected to the bearing, and the floating cylinder is movably connected to the connecting rod.

[0008] Furthermore, the swing arm mechanism also includes a counterweight module, and the counterweight module is arranged on the movable arm or the connecting rod.

[0009] Furthermore, the frame also includes a tensioning mechanism, which includes an adjusting wheel and a linear cylinder. The linear cylinder is arranged at one end of the movable arm, and the adjusting wheel and the linear cylinder are movably connected.

[0010] Furthermore, the adjusting wheel and the working wheel are arranged at two opposite ends of the movable arm.

[0011] Furthermore, the rack is also provided with a cooling mechanism, which includes a spray pump and a spray nozzle, and the spray nozzle is connected to the spray pump.

[0012] Furthermore, the frame is also provided with an alarm mechanism, which includes a pressure sensor and a reminder device. The pressure sensor is provided on the movable arm and contacts the sanding belt, and the pressure sensor is electrically connected to the reminder device.

[0013] Furthermore, the reminder device is a buzzer and a warning light.

[0014] Furthermore, the frame also includes a blower, and the blower is arranged opposite to the impeller.

[0015] The present invention also provides a constant pressure polishing method of an intelligent abrasive belt machine, comprising the following steps:

[0016] (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 abrasive belt, and simultaneously measure the initial pressure between the workpiece and the abrasive belt;

[0017] (2) During the polishing process, the pressure between the workpiece and the abrasive belt is measured, and the measured pressure is compared with the initial pressure; the difference between the measured pressure and the initial pressure is calculated;

[0018] (3) Adjust the motor speed to increase the linear speed of the abrasive belt so that the measured pressure is equal to the initial pressure;

[0019] (4) Establish a mathematical model library to record the change process of motor speed and adjust the motor speed according to time during the polishing operation.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) A floating movable arm is used, and a counterweight module is introduced at the same time. The floating pressure formed by the floating cylinder is balanced and offset with the thrust from the workpiece, thereby achieving a constant grinding pressure.

[0022] (2) According to the wear law of the abrasive belt, a corresponding mathematical model library is established to ensure constant cutting efficiency and improve the service life of the abrasive belt.

[0023] (3) Introduce a tensioning mechanism to create a constant friction between the sand belt and the working wheel, thereby improving the problem of sand belt deviation.

[0024] (4) Introduce a cooling mechanism. During the polishing process, the cooling system cools the surface of the product, improving the original phenomenon of product surface burns due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the driving mechanism and the swing arm mechanism of the present invention;

[0027] Figure 3 It is a rear view of the driving mechanism and the swing arm mechanism of the present invention.

[0028] In the figure: 10, frame; 20, working wheel; 21, movable arm; 22, fixed plate; 23, drive motor; 24, connecting rod; 25, counterweight module; 26, bearing; 27, floating cylinder; 30, adjusting wheel; 31, linear cylinder; 40, blower. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention discloses an intelligent abrasive belt machine, including a frame 10, and the frame 10 is provided with a driving mechanism for driving the movement of the abrasive belt. In this embodiment, the frame 10 is provided with two groups of driving mechanisms, each group of driving mechanisms corresponds to a workstation, and the two groups of workstations have a single-station or multi-station fast switching function. Each group of driving mechanisms includes more than two working wheels 20 and a driving motor 23 for driving the working wheels 20 to rotate, and the driving motor 23 is a servo motor. The frame 10 also includes a tensioning mechanism, and the tensioning mechanism includes an adjusting wheel 30 and a linear cylinder 31, and the linear cylinder 31 is arranged at one end of the movable arm 21, and the adjusting wheel 30 and the linear cylinder 31 are movably connected, and the adjusting wheel 30 and the working wheel 20 are arranged at opposite ends of the movable arm 21. The abrasive belt of each workstation is tensioned on the two working wheels 20 and the adjusting wheel 30 of the driving mechanism, one above and one below.

[0031] In the present invention, the frame 10 also includes a swing arm mechanism, which includes a fixed plate 22, a movable arm 21 and a floating cylinder 27. The working wheel 20 is arranged on the movable arm 21, wherein the interior of the movable arm 21 is hollow, the driving motor 23 is fixed to the movable arm 21 and its output shaft is inserted into the interior of the movable arm 21, and the output shaft is connected to the two working wheels 20 and the adjusting wheel 30 through a conveyor belt for transmission. The fixed plate 22 is provided with a bearing 26, and the movable arm 21 includes a connecting rod 24, and the connecting rod 24 is rotatably connected to the bearing 26. The fixed plate 22 is fixed to the interior of the frame 10, and the movable arm 21 is movably connected to the fixed plate 22. The cylinder of the floating cylinder 27 is connected to the fixed plate 22, and the piston of the floating cylinder 27 is connected to the connecting rod 24, and the cylinder drives the piston to move directly in the horizontal direction. When the polished workpiece contacts the abrasive belt, it will apply thrust to the entire workstation, and the pressure applied by the floating cylinder 27 to the connecting rod 24 offsets the thrust applied by the workpiece to the workstation. Under the pressure of the floating cylinder 27, the range of motion of the movable arm 21 is limited, and the position of the abrasive belt is kept in continuous contact with the workpiece, so that the grinding pressure is kept constant. The swing arm mechanism also includes a counterweight module 25, which is used to increase the stability of the movable arm 21. The counterweight module 25 is arranged on the movable arm 21 or the connecting rod 24. Constant grinding pressure has the advantages of more stable control and better grinding quality for polishing workpieces.

[0032] In the present invention, the frame 10 is also provided with an alarm mechanism, which is used to remind workers when the sand belt breaks. The alarm mechanism includes a pressure sensor and a reminder device, the pressure sensor is provided on the movable arm 21 and contacts the sand belt, the pressure sensor is electrically connected to the reminder device, and the reminder device is a buzzer and a warning light. When the sand belt breaks, the pressure sensor produces a large change in the pressure detected by the sand belt, causing the warning light to flash red and the buzzer to sound to remind the workers, and at the same time, the power supply of the frame 10 is turned off to avoid production accidents.

[0033] During polishing production, if the dust and metal debris are not handled in time, it is easy to pollute the workstation, affecting the service life of the driving mechanism and the swing arm mechanism. In addition, when the sanding belt and the workpiece are in contact and polishing, a large amount of heat is easily generated due to friction. The temperature of the workstation inside the frame 10 will rise sharply after long-term operation, affecting the polishing quality. Therefore, in the present invention, the frame 10 is also provided with a cooling mechanism and a blower 40. The cooling mechanism includes a spray pump and a spray nozzle. The spray nozzle is connected to the spray pump. The spray nozzle is arranged inside the frame 10, but its setting position is not fixed. It can be arranged on the top of the frame 10, or on the side wall of the frame 10 or in the blower 40. It is only necessary to align the spray direction of the spray nozzle with each workstation in the frame 10, and the water mist generated by the nozzle is used to cool the workstation. The blower 40 is arranged opposite to the impeller 20 , and the blower 40 forms an air duct inside the frame 10 that blows toward the outside. When the blower 40 draws air, it draws out dust and metal debris inside the frame 10 to the outside.

[0034] The present invention also provides a constant pressure polishing method of an intelligent abrasive belt machine, comprising the following steps:

[0035] (1) In order to keep the abrasive belt polishing at a constant pressure, when the abrasive belt surface is worn out, the linear speed of the abrasive belt can be increased by increasing the motor speed to compensate for it. To obtain the compensated linear speed, firstly, data on the wear law of the abrasive belt is collected, and an initial speed is set for the drive motor 23 according to the material of the workpiece to be polished and the process parameters of the abrasive belt, and the initial pressure between the workpiece and the abrasive belt is measured at the same time; polishing is performed at the initial speed;

[0036] (2) During the polishing process, the pressure between the workpiece and the abrasive belt is measured, and the measured pressure is compared with the initial pressure; the difference between the measured pressure and the initial pressure is calculated;

[0037] (3) When the measured pressure becomes smaller, adjust the motor speed to increase the linear speed of the sanding belt so that the measured pressure increases to the value of the initial pressure;

[0038] (4) Record the change process of the motor speed and establish a mathematical model library of the relationship between the motor speed and time. According to the change of the measured pressure at a certain time node compared with the initial pressure, the motor speed is increased accordingly. In batch operations, the motor speed can be adjusted according to the time during the polishing process directly according to the data in the mathematical model library, without the need to re-collect the pressure data.

[0039] 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 non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An intelligent belt sander, comprising a frame, wherein the frame is provided with a driving mechanism, wherein the driving mechanism comprises two or more working wheels and a driving motor for driving the working wheels to rotate, Features: The frame further comprises a swing arm mechanism, which comprises a fixed plate, a floating cylinder and a movable arm, wherein the fixed plate is fixed to the frame, the movable arm is movably connected to the fixed plate, the working wheel is arranged on the movable arm, and the floating cylinder limits the movable range of the movable arm; The frame is also provided with an alarm mechanism, which includes a pressure sensor and a reminder device, wherein the pressure sensor is provided on the movable arm and contacts the sanding belt, and the pressure sensor is electrically connected to the reminder device; The frame is also provided with a cooling mechanism, which includes a spray pump and a spray nozzle, and the spray nozzle is connected to the spray pump; A constant pressure polishing method of an intelligent abrasive belt machine comprises the following steps: According to the material of the workpiece to be polished and the process parameters of the abrasive belt, an initial speed is set for the drive motor, and the initial pressure between the workpiece and the abrasive belt is measured at the same time; During the polishing process, the pressure between the workpiece and the abrasive belt is measured, and the measured pressure is compared with the initial pressure; the difference between the measured pressure and the initial pressure is calculated; Adjust the motor speed to increase the linear speed of the sanding belt so that the measured pressure is equal to the initial pressure; A mathematical model library is established to record the changing process of the motor speed, and the motor speed is adjusted according to time during the polishing operation.

2. The intelligent belt sanding machine according to claim 1, Features: The fixed plate is provided with a bearing, the movable arm comprises a connecting rod, the connecting rod is rotatably connected to the bearing, and the floating cylinder is movably connected to the connecting rod.

3. The intelligent belt sanding machine according to claim 2, Features: The swing arm mechanism further comprises a counterweight module, and the counterweight module is arranged on the movable arm or the connecting rod.

4. The intelligent belt sanding machine according to claim 1, Features: The frame also includes a tensioning mechanism, which includes an adjusting wheel and a linear cylinder. The linear cylinder is arranged at one end of the movable arm, and the adjusting wheel and the linear cylinder are movably connected.

5. The intelligent belt sanding machine as claimed in claim 4, Features: The adjusting wheel and the working wheel are arranged at two opposite ends of the movable arm.

6. The intelligent belt sanding machine according to claim 1, Features: The reminder device is a buzzer and a warning light.

7. The intelligent belt sanding machine according to claim 1, Features: The frame also includes a blower, and the blower is arranged opposite to the impeller.

Images