CN214237579U

CN214237579U - Abrasive belt machine

Info

Publication number: CN214237579U
Application number: CN202022988550.2U
Authority: CN
Inventors: 陈文君
Original assignee: Shanghai Asd Robot Co ltd
Current assignee: Shanghai Asd Robot Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-09-21
Anticipated expiration: 2030-12-11

Abstract

The utility model belongs to the technical field of the abrasive band machine, concretely relates to abrasive band machine. To the not enough accurate inadequately of current abrasive band machine constant force control, the utility model discloses a following technical scheme: an abrasive belt machine, comprising: an active motor; a transmission assembly; the polishing assembly comprises a driven wheel, a polishing wheel, a tension wheel and an abrasive belt which are connected with the transmission assembly; a constant force adjustment mechanism comprising an adjustment assembly for detecting a force from the sanding belt and moving the sanding wheel in accordance with the detected force, a tensioning assembly for placing the tensioning wheel in tension. The belt sander has the advantages that the position of the polishing wheel is adjusted through the adjusting assembly, and the adjusting assembly stops after the polishing wheel is adjusted until the value detected by the pressure sensor is normal; the tensioning assembly is arranged, the tensioning wheel is adjusted while the grinding wheel is moved, and the precision can be improved.

Description

Abrasive belt machine

Technical Field

The utility model belongs to the technical field of the abrasive band machine, concretely relates to abrasive band machine.

Background

An abrasive belt machine is a common device used in polishing. In order to improve the grinding and polishing quality, a constant force control structure is arranged on the part of the abrasive belt machine in the market at present. The existing belt sander with the constant force output function mostly adopts an air cylinder or a servo motor to perform constant force control.

The Chinese patent application with publication number CN 109968161A discloses a constant force real-time control mechanism for an abrasive belt machine, which adopts a form that a servo motor drives a screw rod or a rack, utilizes a constant force mode of the servo motor, and sends constant force needing to be output to the servo motor through a background bus (MODBUS, HART, FieldBus, DDE, OPC, TCP and the like), and the servo motor immediately responds to output the constant force; when the force of the grinding and polishing workpiece pressed on the grinding wheel is detected to be larger than the constant force output by the servo motor, the background controls the servo motor to drive the abrasive belt machine to retreat; when the force of the grinding and polishing workpiece pressed on the grinding wheel is detected to be smaller than the constant force output by the servo motor, the servo motor is controlled by the background to drive the abrasive belt machine to move forward; thereby realizing the control of the grinding force. The technical scheme has the disadvantages that the stress of the motor is complex in a processing site, the motor has not only polishing force but also friction force and tension force, and also has component force generated in different polishing directions, the motor is controlled only by constant force, the background calculation is complex, the actual control accuracy is not high, the reprogramming difficulty in later maintenance is very high, and the motor does not have position feedback in a constant force mode.

The chinese patent application with publication number CN 108789060 a discloses a bilateral double-station force-control abrasive belt machine and a polishing workstation thereof, wherein the bilateral double-station force-control abrasive belt machine comprises two sets of single-station polishing cabinets and a power output cabinet, the two sets of single-station polishing cabinets are arranged, the power output cabinet is arranged between the two sets of single-station polishing cabinets, and a force-control cylinder is used to realize the requirement of constant force. According to the scheme, the equipment occupies a large area, the distance between the two grinding wheels is long, the operation of the robot is influenced, and the robot with a large arm spread is often needed in the automatic operation, so that the project cost is influenced; meanwhile, the force control system adopts an air pressure control mode, when the field air pressure is unstable, abnormal polishing phenomena are easy to occur, the polishing quality and precision of workpieces are affected, and the yield is reduced.

In a word, the existing belt sander with the constant force control function adopts a cylinder control mode, and when the field air pressure is unstable, the belt sander is easy to cause the situation that the sanding is not in place or too much; the mode of adopting servo motor control needs the abrasive band machine atress singleness, and the reality operating mode is often more complicated.

Disclosure of Invention

The utility model discloses to current abrasive band machine constant force control not accurate enough, provide an abrasive band machine to promote the constant force control accuracy, promote processingquality.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an abrasive belt machine, comprising:

an active motor;

a transmission assembly;

the polishing assembly is driven by the driving motor through the transmission assembly and comprises a driven wheel, a polishing wheel, a tension wheel and an abrasive belt, wherein the driven wheel, the polishing wheel, the tension wheel and the abrasive belt are connected with the transmission assembly;

a constant force adjustment mechanism comprising an adjustment assembly for detecting a force from the sanding belt and moving the sanding wheel in accordance with the detected force, a tensioning assembly for placing the tensioning wheel in tension.

The utility model discloses an abrasive belt machine has constant force adjustment mechanism, can adopt pressure sensor etc. to detect the power that comes from the abrasive belt, compares the power that detects with preset value or predetermined scope, adjusts the position of the wheel of polishing through adjusting part when too big or too little, adjusts the wheel position of polishing to the numerical value that pressure sensor detected after normal, and adjusting part stops; when adjusting the grinding wheel position at the adjusting part, if the rigidity of take-up pulley is motionless, then the abrasive band can be too tight or too loose, sets up tensioning part, adjusts the take-up pulley when removing the grinding wheel, can promote the precision.

As an improvement, the adjusting component comprises a servo motor, a screw rod connected with the servo motor and a push plate matched with the screw rod, the push plate is connected with the polishing wheel, and a pressure sensor is arranged between the push plate and the polishing wheel. And a servo motor and a lead screw are adopted, so that the constant force control precision is higher. In some occasions with low precision requirements, the servo motor and the lead screw can be replaced by other ones.

As an improvement, the driven wheel and the grinding wheel are arranged on a pushing frame, and the pressure sensor is arranged between the pushing plate and the pushing frame.

As an improvement, the constant force adjusting mechanism comprises a guide assembly, the guide assembly comprises a guide rail and a first sliding block matched with the guide rail, the first sliding block is fixedly connected with a floating plate, and the floating plate is fixedly connected with the pushing frame.

As an improvement, the guide assembly comprises a second sliding block arranged on the guide rail, a floating plate is arranged on the second sliding block, a tensioning actuator is arranged on the floating plate, the tensioning actuator is connected with the tensioning wheel, and the floating plate is fixedly connected with the push plate.

As an improvement, the guide assembly further comprises a third sliding block arranged on the guide rail, a mounting plate is fixedly connected to the third sliding block, a movable tensioning plate is arranged on the mounting plate, the tensioning wheel is arranged on the tensioning plate, and the tensioning actuator is connected with the tensioning plate.

As an improvement, the tensioning actuator is a low-friction air cylinder and the operating air pressure is controlled by an electric proportional valve.

As a refinement, the guide rails have a pair.

As an improvement, a supporting plate driven by a supporting plate cylinder is arranged between the driven wheel and the grinding wheel.

As an improvement, the abrasive belt machine further comprises a dust removal assembly, the dust removal assembly comprises a dust removal box, a dust removal air knife is arranged in the dust removal box, and the abrasive belt penetrates through the dust removal box.

As a modification, the dust removal box is connected to the dust collection box through an air duct.

The utility model discloses an abrasive band machine's beneficial effect is: the pressure sensor compares the detected force with a preset value or a preset range, the position of the grinding wheel is adjusted through the adjusting assembly when the detected force is too large or too small, and the adjusting assembly stops after the position of the grinding wheel is adjusted until the value detected by the pressure sensor is normal; the tensioning assembly is arranged, the tensioning wheel is adjusted while the grinding wheel is moved, and the precision can be improved.

Drawings

Fig. 1 is an exploded schematic view of an abrasive belt machine according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a transmission assembly of an abrasive belt machine according to a first embodiment of the present invention.

Fig. 3 is a schematic structural view of a floating polishing structure of an abrasive belt machine according to a first embodiment of the present invention.

In the figure, 1, a chassis; 11. a fixed frame; 12. a mounting frame;

2. an active motor;

3. a transmission assembly; 31. a connecting shaft; 32. a belt pulley; 33. a driving wheel; 34. a pedestal bearing;

4. polishing the assembly; 41. a driven wheel; 42. grinding the wheel; 43. a tension wheel; 44. an abrasive belt; 45. a support plate;

5. an adjustment assembly; 51. a servo motor; 52. a screw rod; 53. pushing the plate; 54. a pressure sensor; 55. a floating plate; 56. a plate pushing frame;

6. a tension assembly; 61. moving the plate; 62. tensioning the actuator; 63. a tension plate; 64. mounting a plate;

7. a guide assembly; 71. a guide rail; 72. a slider;

8. a dust removal assembly; 81. a dust removal box; 82. a dust removal air knife; 83. a dust removal box;

9. an electrical cabinet;

10. and a pneumatic control box.

Detailed Description

The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the invention.

Referring to fig. 1 to 3, the utility model discloses an abrasive band machine, abrasive band machine includes:

an active motor;

a transmission assembly;

The utility model discloses an abrasive belt machine has constant force adjustment mechanism, and pressure sensor detects the power that comes from the abrasive belt, compares the power that detects with preset value or preset scope, adjusts the position of the wheel of polishing through the adjusting part when too big or too little, adjusts the wheel position of polishing to the numerical value that pressure sensor detected after normal, and the adjusting part stops; when adjusting the grinding wheel position at the adjusting part, if the rigidity of take-up pulley is motionless, then the abrasive band can be too tight or too loose, sets up tensioning part, adjusts the take-up pulley when removing the grinding wheel, can promote the precision.

Referring to fig. 1 to 3, the utility model provides a first kind of abrasive band machine, the abrasive band machine includes:

an active motor 2;

a transmission assembly 3;

a grinding assembly 4, wherein the grinding assembly 4 is driven by the driving motor 2 through the transmission assembly 3, and the grinding assembly 4 comprises a driven wheel 41, a grinding wheel 42, a tension wheel 43 and an abrasive belt 44;

a constant force adjustment mechanism comprising an adjustment assembly 5 for detecting the force from the sanding belt 44 and moving the sanding wheel 42, a tensioning assembly 6 for placing the tensioning wheel 43 in tension.

In this embodiment, the abrasive band machine includes quick-witted case 1, and quick-witted case 1 includes fixed frame 11, installation frame 12, panel beating frame and door, and fixed frame 11 passes through expansion bolts to be fixed in ground, and installation frame 12 passes through the screw installation on fixed frame 11. The abrasive band machine has left door and right door, and installation frame 12 both sides are located respectively to left door and right door.

In this embodiment, the belt sander includes an electrical cabinet 9 and a pneumatic control box 10. The electrical cabinet 9 is arranged on the right side of the mounting frame 12, and the pneumatic control box 10 is arranged on the left side of the mounting frame 12.

In this embodiment, the abrasive band machine includes the power component of polishing, and the power component of polishing includes driving motor 2, motor cover.

In this embodiment, the transmission assembly 3 includes a connecting shaft 31, a pulley 32 and a driving pulley 33. Specifically, there are one pulley 32 and two drive pulleys 33, and the pulley 32 is disposed between the two drive pulleys 33. A bearing 34 with a seat is respectively arranged between the belt pulley 32 and the two driving wheels 33, and the belt pulley 32, the driving wheels 33 and the bearing 34 with the seat are arranged on the same shaft.

In this embodiment, the driving motor 2 is connected to the belt pulley 32 through a belt pulley and a belt on the output shaft of the motor, so as to drive the two driving wheels 33 to rotate, the two driving wheels 33 rotate, the driven wheel 41 is driven to rotate, and the grinding wheel 42, the tension wheel 43 and the abrasive belt 44 are driven to rotate.

In this embodiment, the adjusting assembly 5 includes a servo motor 51, a screw 52 connected to the servo motor 51, and a push plate 53 engaged with the screw 52, and a pressure sensor 54 is disposed between the push plate 53 and the grinding wheel 42. The servo motor 51 in a static state is equivalent to a fixed part, the numerical value detected by the pressure sensor 54 can be ensured to be close to the true value to the maximum extent, the servo motor 51 is not influenced by torque variation, and the misjudgment condition caused by uneven tension can be reduced. The servo motor 51 and the lead screw are adopted, so that the constant force control precision is high. In some occasions with low precision requirements, the servo motor 51 and the lead screw can be replaced by other ones.

In this embodiment, the driven wheel 41 and the grinding wheel 42 are disposed on a pushing frame, and the pressure sensor 54 is disposed between the pushing plate 53 and the pushing frame.

In this embodiment, the constant force adjusting mechanism includes a guide assembly 7, the guide assembly 7 includes a guide rail 71 and a first slider 72 engaged with the guide rail 71, the first slider 72 is fixedly connected to the floating plate 55, and the floating plate 55 is fixedly connected to the pushing frame.

In this embodiment, the servo motor 51 drives the screw rod 52 to rotate, so that the push plate 53 translates along the guide rail 71, and the push plate 53 drives the grinding wheel 42 and the driven wheel 41 on the floating plate 55 to move through the pressure sensor 54, the push frame and the floating plate 55.

In this embodiment, the guide assembly 7 includes a second slider 72 disposed on the guide rail 71, the second slider 72 is provided with a floating plate 55, the floating plate 55 is provided with a tensioning actuator 62, the tensioning actuator 62 is connected to the tensioning wheel 43, and the floating plate 55 is fixedly connected to the push plate 53.

In this embodiment, the guide assembly 7 further includes a third slider 72 disposed on the guide rail 71, the third slider 72 is fixedly connected to a mounting plate 64, the mounting plate 64 is provided with a movable tensioning plate 63, the tensioning wheel 43 is disposed on the tensioning plate 63, and the tensioning actuator 62 is connected to the tensioning plate 63.

In this embodiment, the tensioning plate 63, the moving plate 61 and the floating plate 55 are all connected to the same guide rail 71 through the sliding blocks 72, so that the pushing plate 53 is uniformly stressed, the service life of the servo motor 51 is prolonged, the installation space can be effectively saved, the installation accuracy is improved, and the equipment cost is reduced.

In this embodiment, the tensioning actuator 62 is a low friction cylinder and is controlled by an electrically proportional valve to operate the air pressure. In the situation of low precision requirement, the tensioning actuator 62 can also adopt a common air cylinder, and the electric proportional valve can be replaced by a pressure regulating valve.

In this embodiment, the guide rails 71 have a pair.

In this embodiment, a supporting plate 45 driven by a supporting plate cylinder is provided between the driven wheel 41 and the grinding wheel 42.

In this embodiment, the belt sander further includes a dust removal assembly 8, the dust removal assembly 8 includes a dust removal box 81, a dust removal air knife 82 is disposed in the dust removal box 81, and the abrasive belt 44 passes through the dust removal box 81. By arranging the dust removal box 81 and the dust removal air knife 82, the abrasive belt 44 is cleaned, the service life of the abrasive belt 44 is obviously prolonged, and the frequency of replacing the abrasive belt 44 is reduced.

In this embodiment, the dust removing box 81 is connected to the dust box through an air duct. Set up dust removal box 81 and dust collection box, collect the dust, promote operational environment. The dust collection box is arranged below the grinding wheel 42, and the upper part of the dust collection box is opened. The utility model discloses an abrasive band machine is applied to the manipulator and polishes automatically, therefore need not to set up the platform and be used for placing the work piece.

In this embodiment, the servo motor 51 can be controlled by a PLC.

In this embodiment, the grinding wheels 42 at the left and right stations can not be used for grinding at the same time, and one motor drives the left and right driving wheels 33 to save cost, reduce installation space and improve the utilization rate of the motor. The same abrasive belt 44 may be used for the abrasive belts 44 of the left and right grinding wheels 42, or different abrasive belts 44 may be used. When the same sanding belt 44 is used, the left sanding belt 44 and the right sanding belt 44 can be used alternately, and the frequency of replacing the sanding belts 44 is reduced. When different sanding belts 44 are used, different procedures may be applied.

The embodiment of the utility model provides an abrasive band machine's theory of operation is: after the preset value of the grinding force is set, the equipment is started, the push plate 53 is pushed out by the push plate 53 cylinder, the driving motor 2 drives the belt pulley 32 and the driving wheel 33 to rotate, the driving wheel 33 drives the abrasive belt 44 to rotate through the driven wheel 41, and a workpiece is abutted against the push plate 53 for grinding; before grinding, the value detected by the pressure sensor 54 is the tension force during idling, when the detection value of the pressure sensor 54 is larger than the preset value during grinding, the servo motor 51 acts to drive the grinding wheel 42 and the driven wheel 41 to move in the direction away from the workpiece, the value detected by the pressure sensor 54 is reduced during the movement of the grinding wheel 42, when the value detected by the pressure sensor 54 is within the preset range, the servo motor 51 stops, the grinding wheel 42 and the driven wheel 41 move, the tensioning plate 63 also moves in the same direction, the tension force change of the abrasive belt 44 is smaller, and therefore the adjustment of the tensioning actuator 62, namely the low-friction cylinder, is quicker and more accurate; during grinding, when the detection value of the pressure sensor 54 is smaller than a preset value, the servo motor 51 acts to drive the grinding wheel 42 and the driven wheel 41 to move towards the workpiece, the value detected by the pressure sensor 54 is increased, when the value detected by the pressure sensor 54 is within a preset range, the servo motor 51 stops, the tensioning plate 63 also moves towards the same direction while the grinding wheel 42 and the driven wheel 41 move, the tension change of the grinding belt 44 is smaller, and therefore the tensioning actuator 62, namely the low-friction air cylinder, is adjusted more quickly and accurately. The preset values include at least a maximum threshold and a minimum threshold.

The embodiment of the utility model provides an abrasive band machine's working process can simplify to: starting the equipment, operating the driving motor 2, pushing the supporting plate 45 out by the supporting plate cylinder, setting a preset grinding force value (such as setting a maximum starting threshold value, a minimum starting threshold value and an intermediate stopping value), supporting the workpiece against the supporting plate 45 for grinding, when the detection value of the pressure sensor 54 reaches the maximum starting threshold value, actuating the servo motor 51 until the detection value of the pressure sensor 54 is reduced to the intermediate stopping value, and when the detection value of the pressure sensor 54 reaches the minimum starting threshold value, actuating the servo motor 51 until the detection value of the pressure sensor 54 is increased to the intermediate stopping value.

In other embodiments, only one set of sanding assembly and one constant force adjustment mechanism may be provided.

The embodiment of the utility model provides an abrasive band machine's beneficial effect is: the pressure sensor 54 compares the detected force with a preset value or a preset range, when the detected force is too large or too small, the position of the grinding wheel 42 is adjusted through the adjusting assembly 5, and after the position of the grinding wheel 42 is adjusted until the value detected by the pressure sensor 54 is normal, the adjusting assembly 5 stops; the tensioning assembly 6 is arranged, the tensioning wheel 43 is adjusted while the polishing wheel 42 is moved, and the polishing force is ensured to be constant; the tensioning wheel 43 moves together with the tensioning wheel 43 to a certain degree, and the adjusting range of the tensioning actuator 62, namely the low-friction cylinder, is smaller, and is quicker and more accurate, so that the constant force precision is improved; the structure is compact, the occupied space is small, the distance between the two abrasive belts 44 is small, and the device can be suitable for a manipulator with a short arm spread.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above detailed description. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. An abrasive band machine which characterized in that: the abrasive band machine includes:

an active motor (2);

a transmission assembly (3);

the polishing assembly (4) is driven by the driving motor (2) through the transmission assembly (3), and the polishing assembly (4) comprises a driven wheel (41), a polishing wheel (42), a tension wheel (43) and an abrasive belt (44) which are connected with the transmission assembly (3);

a constant force adjustment mechanism comprising an adjustment assembly (5) for detecting a force from the sanding belt (44) and moving the sanding wheel (42) in dependence of the detected force, a tensioning assembly (6) for placing the tensioning wheel (43) in tension.

2. The belt sander of claim 1, wherein: the adjusting assembly (5) comprises a servo motor (51), a screw rod (52) connected with the servo motor (51), and a push plate (53) matched with the screw rod (52), wherein the push plate (53) is connected with the polishing wheel (42), and a pressure sensor (54) is arranged between the push plate (53) and the polishing wheel (42).

3. The belt sander of claim 2, wherein: the driven wheel (41) and the grinding wheel (42) are arranged on a pushing frame, and the pressure sensor (54) is arranged between the pushing plate (53) and the pushing frame.

4. The belt sander of claim 3, wherein: the constant force adjusting mechanism comprises a guide assembly (7), the guide assembly (7) comprises a guide rail (71) and a first sliding block (72) matched with the guide rail (71), a floating plate (55) is fixedly connected onto the first sliding block (72), and the pushing frame is fixedly connected onto the floating plate (55).

5. The belt sander of claim 4, wherein: the guide assembly (7) comprises a second sliding block (72) arranged on the guide rail (71), a floating plate (55) is arranged on the second sliding block (72), a tensioning actuator (62) is arranged on the floating plate (55), the tensioning actuator (62) is connected with the tensioning wheel (43), and the floating plate (55) is fixedly connected with the push plate (53).

6. The belt sander of claim 5, wherein: the guide assembly (7) further comprises a third sliding block (72) arranged on the guide rail (71), a mounting plate (64) is fixedly connected onto the third sliding block (72), a movable tensioning plate (63) is arranged on the mounting plate (64), the tensioning wheel (43) is arranged on the tensioning plate (63), and the tensioning actuator (62) is connected with the tensioning plate (63).

7. The belt sander of claim 6, wherein: the tensioning actuator (62) is a low-friction cylinder and is controlled by an electric proportional valve to operate air pressure;

the guide rails (71) are paired.

8. The belt sander of claim 1, wherein: and a supporting plate (45) driven by a supporting plate cylinder is arranged between the driven wheel (41) and the grinding wheel (42).

9. The belt sander of claim 1, wherein: the abrasive belt machine further comprises a dust removal assembly (8), the dust removal assembly (8) comprises a dust removal box (81), a dust removal air knife (82) is arranged in the dust removal box (81), and the abrasive belt (44) penetrates through the dust removal box (81).

10. The belt sander of claim 9, wherein: the dust removal box (81) is connected to the dust collection box through an air pipe.