Multi-station belt sander and control method thereof

Abstract

The invention discloses a workpiece grinding device and aims to provide a multi-station abrasive belt grinding machine which is high in machining efficiency, capable of conducting multi-level precision grinding at the same time, small in occupied space and convenient to replace an abrasive belt and a control method of the multi-station abrasive belt grinding machine. According to the key points of the technical scheme, through a machining rotary disc and a grinding device arranged in the outer tangent line direction of the machining rotary disc, a positioning device corresponding to the grinding device is arranged on the machining rotary disc, the grinding device can set different parameters according to requirements, automatic switching of multi-stage machining parameters is completed, the adaptability of the technology is improved, and the machining efficiency is improved. Integrated machining of multi-stage precision grinding of materials is achieved, meanwhile, the abrasive belt can be conveniently replaced by adjusting the tightness degree of the grinding abrasive belt, in the grinding machining process of the workpiece, contact between the grinding abrasive belt and the workpiece is achieved through the driving assembly, the overall machining precision is high, the machining effect is good, and the machining efficiency is high. The invention is suitable for the technical field of workpiece polishing devices.

Description

Technical Field

[0001] The present invention relates to a grinding device for workpieces, and more specifically, to a multi-station abrasive belt grinding machine and its control method. Background Art

[0002] In the production process of metal sheet products, it is necessary to grind and polish metal sheets or semi-finished products. Usually, a angle grinder is used to grind the plane and edges. An abrasive belt grinding machine is a surface grinding machine for small workpieces. During the grinding process, it can remove burrs, and at the same time, quickly repair deep scratches and slight scratches generated during the processing. The abrasive belt grinding machine grinds the workpiece by the friction between the driven abrasive belt and the workpiece surface, which is an elastic grinding. It has the functions of grinding, polishing, and lapping, and it can adjust the fineness of the workpiece grinding surface according to the particle size of the abrasive belt and the driving speed. Compared with the grinding and polishing of a polishing wheel, the abrasive belt polishing is more convenient for processing, safer during processing, and has less noise and dust during processing, and has a higher surface quality after processing.

[0003] At present, the structure of the abrasive belt grinding mechanism on the market is complex, and only one grinding accuracy can be set. Generally, when grinding a workpiece, it is necessary to perform step-by-step grinding. Therefore, it is necessary to use multiple grinding mechanisms with different progressions to grind the workpiece, which makes the grinding mechanism occupy more space, and the device is difficult to replace the abrasive belt, and the processing efficiency is low. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a multi-station abrasive belt grinding machine and its control method with high processing efficiency, which can perform multiple levels of precision grinding simultaneously, occupy less space, and is convenient for replacing the abrasive belt.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A multi-station abrasive belt grinding machine includes a processing base, a processing turntable is provided on the processing base, a plurality of positioning devices are provided on the processing turntable, a grinding device is provided on the processing base along the outer tangent direction of the processing turntable, the grinding device includes a mounting plate, an abrasive belt wheel assembly provided on the mounting plate, and a grinding abrasive belt provided on the abrasive belt wheel assembly. A driving component is arranged inside the abrasive belt wheel assembly, and the driving component is configured to drive the grinding abrasive belt to move towards the positioning device.

[0006] The present invention is further configured as follows: the driving assembly includes a driving cylinder disposed on the mounting plate and a sand belt pushing plate disposed at the bottom of the driving cylinder. A backing plate is further provided between the sand belt pushing plate and the abrasive belt. The backing plate is used to isolate the abrasive belt from the sand belt pushing plate and prevent the abrasive belt from wearing the sand belt pushing plate.

[0007] The present invention is further configured as follows: the driving assembly includes a driving cylinder disposed on the mounting plate and a sand belt pushing plate disposed at the bottom of the driving cylinder. A backing plate is further provided between the sand belt pushing plate and the abrasive belt. The backing plate is used to isolate the abrasive belt from the sand belt pushing plate and prevent the abrasive belt from wearing the sand belt pushing plate.

[0008] The present invention is further configured as follows: the positioning device includes a slide cylinder disposed on the processing turntable, a slide plate disposed on the slide cylinder, a positioning cylinder disposed on the slide plate, a processing baffle disposed on the side of the slide away from the positioning cylinder, and a tooling pushing plate disposed on the side of the positioning cylinder close to the processing baffle.

[0009] The present invention is further configured as follows: the sand belt wheel assembly includes a driving wheel, a driven wheel disposed on one side of the driving wheel, and a tensioning wheel disposed at the upper ends of the driving wheel and the driven wheel. The tensioning wheel is disposed on the perpendicular line of the connection line between the driving wheel and the driven wheel. A rotating motor is disposed at the rear of the driving wheel, and the rotating motor is used to drive the driving wheel to rotate.

[0010] Preferably, an adjusting device is further provided at the rear end of the mounting plate. The adjusting device includes an adjusting wheel plate disposed on the top of the mounting plate and an adjusting spring disposed on the adjusting wheel plate. The tensioning wheel is disposed on the adjusting wheel plate. One end of the adjusting spring is fixedly connected to the adjusting wheel plate, and the other end is connected to the mounting plate. The adjusting wheel plate is used to drive the position of the tensioning wheel relative to the mounting plate, so as to tension / relax the abrasive belt.

[0011] Preferably, a hook member is further provided on the adjusting wheel plate, and a hook base is provided on the mounting plate. The shape of the hook member matches the shape of the hook base.

[0012] The present invention is further configured as follows: a rotating motor is disposed at the bottom of the processing turntable, a braking motor is disposed on one side of the rotating motor, and an induction bracket is further provided at a position on the bottom of the processing turntable that matches each positioning device. The induction bracket is used to allow the positioning device on the processing turntable to rotate by a fixed angle.

[0013] Preferably, the material of the backing plate is graphite.

[0014] This application also provides a control method for a multi-station abrasive belt grinding machine. The control method includes the following steps: S1. Place the material on the positioning device, and at the same time, the positioning cylinder on the positioning device pushes the material to abut against the processing baffle;

[0015] S2. After the positioning cylinder fixes the material, the device detects the width of the material;

[0016] S3. Based on the detected width of the material, each grinding device of the grinding machine is set so that the pushing distances of the driving components of each grinding device are L1, L2, and L3 respectively;

[0017] S4. The transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device in the next position. At this time, the material is located at the first grinding device;

[0018] S5. After the transfer motor finishes moving, the rotation motor drives the driving wheel to rotate, so that the grinding sand belt in the grinding device moves. At the same time, the driving component in the grinding sand belt pushes the grinding sand belt to move towards the workpiece. At the same time, the sand belt push plate detects whether it contacts the workpiece. If so, it is judged that the grinding sand belt at the current station contacts the workpiece and starts grinding. Otherwise, it is judged that the grinding sand belt at the current station has not reached the workpiece, and the sand belt push plate continues to move and detects again;

[0019] S6. After the grinding sand belt contacts the workpiece, the driving component continues to move to grind the workpiece. At the same time, the distance La that the driving component moves towards the workpiece is recorded. If La < L1, it is judged that the current grinding device is not processed completely, and the driving component continues to move. Otherwise, if La ≥ L1, it is judged that the current grinding device is processed completely, and the driving component retracts. At the same time, the transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device in the next position. At this time, the material is located at the second grinding device;

[0020] S7. The workpiece in the current grinding device is processed in a method similar to steps S5 - S6, so that the workpiece rotates through each station of the grinding machine, and moves back to the initial position and discharges through the transfer motor, completing the grinding of the workpiece.

[0021] Preferably, the calculation formula for the moving distance of the driving component in step S6 is as follows:

[0022] L = S×T

[0023] Wherein, L is the moving distance of the driving component, S is the moving speed of the driving component pushing the grinding sand belt in the current grinding device, and T is the time for the driving component to push the grinding sand belt.

[0024] By adopting the above technical solution, the beneficial effects are as follows: 1. The present application uses a processing turntable and a grinding device arranged in the direction of the outer tangent of the processing turntable, and the processing turntable is provided with a positioning device corresponding to the grinding device. The grinding device can set different parameters according to needs, thereby completing the automatic switching of multi-level processing parameters, improving the processing accuracy and process adaptability, and driving the material to flow between the various grinding devices through the processing turntable, realizing the integrated processing of multi-level precision grinding of the material, and can transform the linear production line of grinding processing into a ring-shaped integrated layout, reducing the processing time. The footprint of the working device is small, and a grinding belt wheel assembly and an adjusting device arranged on the grinding belt wheel assembly are arranged on the mounting plate, which ensures the tightness of the grinding belt on the grinding belt wheel assembly. At the same time, the grinding belt can be conveniently replaced by adjusting the tightness of the grinding belt. In the process of grinding the workpiece, the contact between the grinding belt and the workpiece is achieved through the driving assembly. The overall processing precision is high and the processing effect is good. A graphite pad for preventing wear is arranged between the grinding belt push plate of the driving assembly and the grinding belt, which prolongs the service life of the grinding belt and the equipment as a whole.

[0025] 2. Furthermore, in order to improve the positioning accuracy of the workpiece during the processing, the positioning device realizes dual positioning of the workpiece through the slide cylinder and the positioning cylinder. Specifically, the position of the processing baffle on the positioning device is set by the slide cylinder, so that when the positioning cylinder pushes the workpiece to conflict with the processing baffle, the position of the grinding belt matches the position of the workpiece that needs to be processed. At the same time, a plurality of independent grinding units are arranged along the tangential direction on the periphery of the processing turntable, and different grinding parameters are set by independently arranged grinding belt wheels. The grinding belt wheel assembly is provided with a driving wheel and a driven wheel. When the grinding belt is wound around the grinding belt wheel assembly, a horizontally arranged grinding path is formed between the driving wheel and the driven wheel, and the grinding path is tightened by a tensioning wheel arranged on a vertical line of the connecting line between the driving wheel and the driven wheel, so that the grinding path remains relatively parallel to the workpiece, thereby ensuring the grinding accuracy of the workpiece during the processing and improving the grinding effect.

[0026] 3. Meanwhile, the abrasive belt wheel assembly fixes the abrasive belt through the driving wheel, the driven wheel and the tensioning wheel. And an adjusting device is arranged at the rear end of the mounting plate, which can ensure the tension of the abrasive belt during the processing, improve the processing effect, prevent the abrasive belt from falling off during the processing. At the same time, a hook member is arranged on the adjusting plate, and a hook base matching the hook member is arranged on the mounting plate. The position of the adjusting plate is fixed by the engagement of the hook member and the hook base. When the abrasive belt needs to be replaced, the quick-release structure of the hook member-hook base is disassembled, so that the tensioning wheel moves downward, canceling the tension of the abrasive belt, thus facilitating the disassembly and replacement of the abrasive belt. After the abrasive belt is reinstalled, the preset tension value of the abrasive belt is automatically restored by re-engaging the hook member and the hook base. And by arranging a rotating motor and a braking motor at the bottom of the processing turntable, and adjusting the rotation angle of the processing turntable through the induction bracket arranged at the bottom of the processing turntable. Specifically, the rotating motor drives the processing turntable to rotate, and at the same time, the processing turntable is detected. When the induction device is detected, it is judged that the current processing turntable has rotated a certain angle, and at this time, each station has completed a turnover. Through the above scheme, the precise displacement of each station can be realized, ensuring the processing accuracy.

[0027] 4. And, through the width detection of the material, the width information of the surface to be processed of the current material is obtained in the processing method, so that various parameters required during processing can be conveniently obtained according to the information of the processing surface. The active width detection design can meet the processing requirements of workpieces of different sizes, and can set the positions of the sliding table plate and the processing baffle according to the detected size, so that the grinding position of the workpiece matches the position of the abrasive belt, and the advancing amount during the grinding process of each station can be obtained based on the workpiece size. The advancing amounts L1, L2, and L3 respectively provide the feeding amounts of abrasive belts with different grinding precisions. And during the processing, the feeding amount of the abrasive belt is detected by variable calculation of speed-time, and it is detected whether it contacts the workpiece to be processed through the pressure of the abrasive belt push plate. The displacement can be detected after the abrasive belt push plate contacts the workpiece, and the displacement amount is detected and transmitted back to prevent the overpressure risk during the processing and improve the processing safety. Description of the Drawings

[0028] Figure 1 It is a specific structural schematic diagram of an embodiment of a multi-station abrasive belt grinding machine and its control method of the present invention;

[0029] Figure 2 It is a specific structural schematic diagram of the positioning device and the grinding device of an embodiment of a multi-station abrasive belt grinding machine and its control method of the present invention;

[0030] Figure 3Schematic diagram of the specific structure of the adjustment device in the embodiment of a multi-station abrasive belt grinding machine and its control method of the present invention;

[0031] Figure 4 Flow chart of the control method of the abrasive belt grinding machine in the embodiment of a multi-station abrasive belt grinding machine and its control method of the present invention;

[0032] Reference numerals in the figure: 1, processing base; 2, processing turntable; 21, rotation motor; 22, brake motor; 23, induction bracket; 3, positioning device; 31, slide cylinder; 32, slide plate; 33, positioning cylinder; 34, processing baffle; 35, tooling push plate; 4, grinding device; 41, mounting plate; 42, abrasive belt wheel assembly; 421, driving wheel; 422, driven wheel; 423, tensioning wheel; 424, rotation motor; 43, grinding abrasive belt; 5, driving assembly; 51, driving cylinder; 52, abrasive belt push plate; 53, backing plate; 6, adjustment device; 61, adjusting wheel plate; 62, adjusting spring; 63, hook member; 64, hook base. Detailed implementation manners

[0033] Refer to Figures 1 to 4 To further describe the embodiment of a multi-station abrasive belt grinding machine and its control method of the present invention.

[0034] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the relationship between one element or feature shown in the figure and another element or feature. It should be understood that in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0035] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0036] A multi-station abrasive belt grinding machine, including a processing base 1, a processing turntable 2 is provided on the processing base 1, a number of positioning devices 3 are provided on the processing turntable 2, and a grinding device 4 is provided on the processing base 1 along the outer tangent direction of the processing turntable 2. The grinding device 4 includes a mounting plate 41, an abrasive belt wheel assembly 42 provided on the mounting plate 41, and a grinding abrasive belt 43 provided on the abrasive belt wheel assembly 42. A driving assembly 5 is provided inside the abrasive belt wheel assembly 42, and the driving assembly 5 is configured to drive the grinding abrasive belt 43 to move towards the positioning device 3.

[0037] The driving assembly 5 includes a driving cylinder 51 provided on the mounting plate 41 and a sand belt push plate 52 provided at the bottom of the driving cylinder 51. A backing plate 53 is further provided between the sand belt push plate 52 and the grinding abrasive belt 43. The backing plate 53 is used to isolate the grinding abrasive belt 43 from the sand belt push plate 52 to prevent the grinding abrasive belt 43 from wearing the sand belt push plate 52.

[0038] The driving assembly 5 includes a driving cylinder 51 provided on the mounting plate 41 and a sand belt push plate 52 provided at the bottom of the driving cylinder 51. A backing plate 53 is further provided between the sand belt push plate 52 and the grinding abrasive belt 43. The backing plate 53 is used to isolate the grinding abrasive belt 43 from the sand belt push plate 52 to prevent the grinding abrasive belt 43 from wearing the sand belt push plate 52.

[0039] The positioning device 3 includes a slide table cylinder 31 provided on the processing turntable 2, a slide table plate 32 provided on the slide table cylinder 31, a positioning cylinder 33 provided on the slide table plate 32. A processing baffle 34 is further provided on the side of the slide table away from the positioning cylinder 33, and a tooling push plate 35 is further provided on the side of the positioning cylinder 33 close to the processing baffle 34.

[0040] The abrasive belt wheel assembly 42 includes a driving wheel 421, a driven wheel 422 provided on one side of the driving wheel 421, and a tensioning wheel 423 provided at the upper ends of the driving wheel 421 and the driven wheel 422. The tensioning wheel 423 is provided on the perpendicular line of the connection line between the driving wheel 421 and the driven wheel 422. A rotating motor 424 is provided at the rear of the driving wheel 421, and the rotating motor 424 is used to drive the driving wheel 421 to rotate.

[0041] Preferably, an adjusting device 6 is further provided at the rear end of the mounting plate 41. The adjusting device 6 includes an adjusting wheel plate 61 provided on the top of the mounting plate 41 and an adjusting spring 62 provided on the adjusting wheel plate 61. The tensioning wheel 423 is provided on the adjusting wheel plate 61. One end of the adjusting spring 62 is fixedly connected to the adjusting wheel plate 61, and the other end is connected to the mounting plate 41. The adjusting wheel plate 61 is used to drive the position of the tensioning wheel 423 relative to the mounting plate 41, so as to tighten / loosen the grinding abrasive belt 43.

[0042] Preferably, a hooking member 63 is further provided on the adjusting wheel plate 61, a hooking base 64 is provided on the mounting plate 41, and the shape of the hooking member 63 matches the shape of the hooking base 64.

[0043] A flow motor 21 is provided at the bottom of the processing turntable 2, a braking motor 22 is provided on one side of the rotating motor 424, and an induction bracket 23 is further provided at a position on the bottom of the processing turntable 2 that matches each positioning device 3. The induction bracket 23 is used to allow the positioning device 3 on the processing turntable 2 to rotate by a fixed angle.

[0044] Preferably, the material of the backing plate 53 is graphite.

[0045] In this application, through the processing turntable 2 and the grinding device 4 arranged in the outer tangent direction of the processing turntable 2, and a positioning device 3 corresponding to the grinding device 4 is provided on the processing turntable 2. The grinding device 4 can be set with different parameters according to requirements, so as to complete the automatic switching of multi-level processing parameters, improve the processing accuracy and the adaptability of the process, and drive the material to flow between each grinding device 4 by the processing turntable 2, realizing the integrated processing of multi-level precision grinding of the material. It can transform the linear production line of grinding processing into a circular integrated layout, reduce the floor area of the processing device. At the same time, a sand belt wheel assembly 42 is provided on the mounting plate 41 and an adjusting device 6 is provided on the sand belt wheel assembly 42, which ensures the tightness of the grinding sand belt 43 on the sand belt wheel assembly 42, and can conveniently replace the sand belt by adjusting the tightness of the grinding sand belt 43. During the grinding process of the workpiece, the contact between the grinding sand belt 43 and the workpiece is realized through the driving component 5. The overall processing has high precision and good processing effect. And a graphite backing plate 53 for preventing wear is provided between the sand belt push plate 52 of the driving component 5 and the grinding sand belt 43, which prolongs the service life of the grinding sand belt 43 and the overall equipment.

[0046] Furthermore, in order to improve the positioning accuracy of the workpiece during the machining process, the positioning device 3 realizes double positioning of the workpiece through the slide cylinder 31 and the positioning cylinder 33. Specifically, the position of the machining baffle 34 on the positioning device 3 is set by the slide cylinder 31, so that when the positioning cylinder 33 pushes the workpiece to abut against the machining baffle 34, the position of the grinding sand belt 43 matches the position where the workpiece needs to be machined. At the same time, a plurality of independent grinding units are arranged tangentially along the periphery of the machining turntable 2, and different grinding parameters are set through the independently arranged abrasive belt wheels. The abrasive belt wheel assembly 42 is provided with a driving wheel 421 and a driven wheel 422. When the grinding sand belt 43 is wound around the abrasive belt wheel assembly 42, a horizontally arranged grinding path is formed between the driving wheel 421 and the driven wheel 422, and is tightened by a tensioning wheel arranged on the perpendicular line of the connecting line between the driving wheel 421 and the driven wheel 422, so that the grinding path is kept parallel to the workpiece, ensuring the grinding accuracy of the workpiece during the machining process and improving the grinding effect.

[0047] At the same time, the abrasive belt wheel assembly 42 fixes the grinding sand belt 43 through the driving wheel 421, the driven wheel 422 and the tensioning wheel 423. And an adjusting device 6 is arranged at the rear end of the mounting plate 41, which can ensure the tension of the sand belt during the machining process, improve the machining effect, and prevent the sand belt from falling off during the machining process. At the same time, a hook member 63 is arranged on the adjusting plate, and a hook base 64 matching the hook member 63 is arranged on the mounting plate 41. The position of the adjusting plate is fixed by the engagement of the hook member 63 and the hook base 64. When the grinding sand belt 43 needs to be replaced, the quick-release structure of the hook member 63 - hook base 64 is disassembled, so that the tensioning wheel 423 moves downward to cancel the tension of the grinding sand belt 43, thus facilitating the disassembly and replacement of the grinding sand belt 43. After the grinding sand belt 43 is reinstalled, the preset tension value of the grinding sand belt 43 is automatically restored by re-engaging the hook member 63 and the hook base 64. And by arranging a transfer motor 21 and a brake motor 22 at the bottom of the machining turntable 2, and adjusting the rotation angle of the machining turntable 2 through an induction bracket 23 arranged at the bottom of the machining turntable 2. Specifically, the transfer motor 21 drives the machining turntable 2 to rotate, and at the same time, the machining turntable 2 is detected. When the induction device is detected, it is judged that the current machining turntable 2 has rotated a certain angle, and at this time, each station has completed a transfer. Through the above scheme, the precise displacement of each station can be realized, ensuring the machining accuracy.

[0048] The present application also provides a control method for a multi-station abrasive belt grinding machine. The control method includes the following steps: S1. The material is placed on the positioning device, and at the same time, the positioning cylinder on the positioning device pushes the material to abut against the machining baffle;

[0049] S2. After the positioning cylinder fixes the material, the device detects the width of the material;

[0050] S3. Based on the detected width of the material, each grinding device of the grinding machine is set so that the pushing distances of the driving components of each grinding device are L1, L2, and L3 respectively;

[0051] S4. The transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device in the next position. At this time, the material is located at the first grinding device;

[0052] S5. After the transfer motor finishes moving, the rotation motor drives the driving wheel to rotate, so that the grinding abrasive belt in the grinding device moves. At the same time, the driving component in the grinding abrasive belt pushes the grinding abrasive belt to move towards the workpiece. At the same time, the abrasive belt push plate detects whether it contacts the workpiece. If so, it is determined that the grinding abrasive belt at the current station contacts the workpiece and starts grinding. Otherwise, it is determined that the grinding abrasive belt at the current station has not reached the workpiece, and the abrasive belt push plate continues to move and detects again;

[0053] S6. After the grinding abrasive belt contacts the workpiece, the driving component continues to move to grind the workpiece. At the same time, the distance La that the driving component moves towards the workpiece is recorded. If La < L1, it is determined that the current grinding device is not processed completely, and the driving component continues to move. Otherwise, if La ≥ L1, it is determined that the current grinding device is processed completely, and the driving component retracts. At the same time, the transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device in the next position. At this time, the material is located at the second grinding device;

[0054] S7. The workpiece in the current grinding device is processed in a method similar to steps S5 - S6, so that the workpiece rotates through each station of the grinding machine, and moves back to the initial position and discharges through the transfer motor to complete the grinding of the workpiece.

[0055] Preferably, the calculation formula for the moving distance of the driving component in step S6 is as follows:

[0056] L = S × T

[0057] Wherein, L is the moving distance of the driving component, S is the moving speed of the driving component pushing the grinding abrasive belt in the current grinding device, and T is the time for the driving component to push the grinding abrasive belt.

[0058] Moreover, the described processing method obtains the width information of the surface to be processed of the current workpiece through the width detection of the workpiece, so that various parameters required during processing can be conveniently obtained based on the information of the processing surface. The active width detection design can meet the processing requirements of workpieces of different sizes, and can set the positions of the sliding table plate 32 and the processing baffle 34 according to the detected size, so that the grinding position of the workpiece matches the position of the grinding belt 43, and the advancement amount during the grinding process of each station can be obtained based on the workpiece size. The advancement amounts L1, L2, and L3 respectively provide the feed amounts of the grinding belts 43 with different grinding precisions. Moreover, during the processing, the feed amount of the grinding belt 43 is detected through the calculation of the velocity-time variable, and it is detected whether it contacts the workpiece to be processed through the pressure of the belt pushing plate 52. The displacement can be detected after the belt pushing plate 52 contacts the workpiece, and the displacement amount is detected and transmitted back to prevent the overpressure risk during the processing and improve the processing safety.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-station abrasive belt grinding machine, comprising a processing base (1), characterized in that, A processing base (1) is provided with a processing turntable (2). A number of positioning devices (3) are provided on the processing turntable (2). A grinding device (4) is provided on the processing base (1) along the outer tangent direction of the processing turntable (2). The grinding device (4) includes a mounting plate (41), a sand belt wheel assembly (42) provided on the mounting plate (41), and a grinding sand belt (43) provided on the sand belt wheel assembly (42). A driving component (5) is provided inside the sand belt wheel assembly (42). The driving component (5) is configured to drive the grinding sand belt (43) to move towards the positioning device (3).

2. The multi-station abrasive belt grinding machine according to claim 1, characterized in that, The driving component (5) includes a driving cylinder (51) provided on the mounting plate (41) and a sand belt pushing plate (52) provided at the bottom of the driving cylinder (51). A backing plate (53) is further provided between the sand belt pushing plate (52) and the grinding sand belt (43). The backing plate (53) is used to isolate the grinding sand belt (43) from the sand belt pushing plate (52) to prevent the grinding sand belt (43) from wearing the sand belt pushing plate (52).

3. A multi-station abrasive belt grinding machine according to claim 1, wherein, The positioning device (3) includes a slide table cylinder (31) provided on the processing turntable (2), a slide table plate (32) provided on the slide table cylinder (31). A positioning cylinder (33) is provided on the slide table plate (32). A processing baffle (34) is further provided on the side of the slide table away from the positioning cylinder (33). A tooling pushing plate (35) is further provided on the side of the positioning cylinder (33) close to the processing baffle (34).

4. A multi-station abrasive belt grinding machine according to claim 1, wherein The sand belt wheel assembly (42) includes a driving wheel (421), a driven wheel (422) provided on one side of the driving wheel (421), and a tensioning wheel (423) provided at the upper ends of the driving wheel (421) and the driven wheel (422). The tensioning wheel (423) is provided on the perpendicular line of the connection line between the driving wheel (421) and the driven wheel (422). A rotating motor (424) is provided at the rear of the driving wheel (421). The rotating motor (424) is used to drive the driving wheel (421) to rotate.

5. The multi-station belt grinding machine according to claim 4, wherein An adjusting device (6) is further provided at the rear end of the mounting plate (41). The adjusting device (6) includes an adjusting wheel plate (61) provided on the top of the mounting plate (41) and an adjusting spring (62) provided on the adjusting wheel plate (61). The tensioning wheel (423) is provided on the adjusting wheel plate (61). One end of the adjusting spring (62) is fixedly connected to the adjusting wheel plate (61), and the other end is connected to the mounting plate (41). The adjusting wheel plate (61) is used to drive the position of the tensioning wheel (423) relative to the mounting plate (41) to tighten / loosen the grinding sand belt (43).

6. The multi-station abrasive belt grinding machine according to claim 5, wherein, A hook member (63) is further provided on the adjusting wheel plate (61). A hook base (64) is provided on the mounting plate (41). The shape of the hook member (63) matches the shape of the hook base (64).

7. A multi-station abrasive belt grinding machine according to claim 1, characterized in that, A transfer motor (21) is provided at the bottom of the processing turntable (2). A braking motor (22) is provided on one side of the rotation motor (424). An induction bracket (23) is also provided at a position on the bottom of the processing turntable (2) that matches each positioning device (3). The induction bracket (23) is used to allow the positioning device (3) on the processing turntable (2) to rotate by a fixed angle.

8. The multi-station belt grinding machine according to claim 2, wherein, The material of the backing plate (53) is graphite.

9. A control method applicable to a multi-station abrasive belt grinding machine according to any one of claims 1-8, characterized in that, The control method includes the following steps: S1. Place the material on the positioning device, and at the same time, the positioning cylinder on the positioning device pushes the material to abut against the processing baffle; S2. After the positioning cylinder fixes the material, the device detects the width of the material; S3. Set each grinding device of the grinding machine based on the detected width of the material, so that the pushing distances of the driving components of each grinding device are L1, L2, and L3 respectively; S4. The transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device at the next position. At this time, the material is located at the first grinding device; S5. After the transfer motor finishes moving, the rotation motor drives the driving wheel to rotate, so that the grinding abrasive belt in the grinding device moves. At the same time, the driving component in the grinding abrasive belt pushes the grinding abrasive belt to move towards the workpiece. At the same time, the abrasive belt push plate detects whether it contacts the workpiece. If so, it is determined that the grinding abrasive belt at the current station contacts the workpiece and starts grinding. Otherwise, it is determined that the grinding abrasive belt at the current station has not reached the workpiece, and the abrasive belt push plate continues to move and detects again; S6. After the grinding abrasive belt contacts the workpiece, the driving component continues to move to grind the workpiece. At the same time, record the distance La that the driving component moves towards the workpiece. If La < L1, it is determined that the current grinding device is not processed completely, and the driving component continues to move. Otherwise, if La ≥ L1, it is determined that the current grinding device is processed completely, and the driving component retracts. At the same time, the transfer motor drives the processing turntable to rotate, so that the material of the positioning device moves to the grinding device at the next position. At this time, the material is located at the second grinding device; S7. Process the workpiece in the current grinding device in a method similar to steps S5 - S6, so that the workpiece rotates through each station of the grinding machine, and moves back to the initial position and discharges through the transfer motor to complete the grinding of the workpiece.

10. The control method of a multi-station abrasive belt grinding machine according to claim 8, characterized in that, The calculation formula for the moving distance of the driving component in step S6 is as follows: L = S × T Where L is the moving distance of the driving component, S is the moving speed of the driving component pushing the grinding abrasive belt in the current grinding device, and T is the driving component pushing the grinding abrasive.

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