CN218746848U - Compressing type abrasive belt transmission numerical control abrasive belt machine - Google Patents

Abstract

The utility model relates to a pressing mode abrasive band transmission numerical control abrasive band machine, including abrasive band and the abrasive band transmission who drives the abrasive band removal, abrasive band transmission includes the action wheel, follows driving wheel, tensioning abrasive band wheel and compresses tightly the abrasive band wheel, compresses tightly the abrasive band wheel and compresses tightly the abrasive band in the surface of action wheel, and the area sand face in abrasive band compresses tightly the laminating with the surface of action wheel, and in action wheel pivoted, the abrasive band removes under the drive of action wheel. The abrasive belt is wound on the outer side of the soft rubber shaft, and the shapes of the abrasive belt and the soft rubber shaft deform along with the shape of the workpiece with the irregular shape and are fully contacted with the workpiece with the irregular shape, so that the workpiece with the irregular shape is ground and polished. The abrasive belt has rough abrasive surface and increased friction with the driving wheel, so that the driving force of the driving wheel to the abrasive belt is increased, the abrasive belt is tensioned by the abrasive belt wheel and is only required to be slightly straightened without being pulled too tightly, the abrasive belt is tightly attached to the irregular appearance part of the special-shaped workpiece through the soft rubber shaft, and the abrasive belt is polished to have more ideal effect.

Description

Compressing type abrasive belt transmission numerical control abrasive belt machine

Technical Field

The utility model relates to a burnishing and polishing equipment technical field, concretely relates to pressing mode abrasive band transmission numerical control abrasive band machine.

Background

The abrasive belt machine is a common grinding and polishing device and is widely applied to grinding and forming of workpieces. The function of belt sander in the metal working industry becomes irreplaceable, and belt sanding devices are commonly used in metal working processes such as surface polishing, circular polishing, dressing polishing and grinding, radius polishing, chamfering and deburring.

The abrasive belt machine realizes power output by tensioning the driving wheel and the driven wheel through the abrasive belt, and the abrasive belt is generally pulled to be tighter to obtain higher output power during grinding. In a device for increasing transmission force by using friction of an abrasive belt, which is disclosed in patent document CN214771128U, the friction between the abrasive belt and a drive wheel is increased by making the abrasive belt pass around the outer side of the drive wheel, and if the abrasive belt is not pulled tightly enough, slip occurs between the drive wheel and the abrasive belt, which affects rotation of the abrasive belt. If the belt is pulled too tightly, the rubber shaft used as the driven wheel is compressed and becomes less elastic, so that a softer rubber shaft cannot be used for the driven wheel.

However, for products with irregular shapes, the purpose of polishing irregular parts needs to be achieved through external deformation of the soft rubber shaft, and polishing of irregular parts cannot be achieved due to the fact that the driven wheel cannot use the soft rubber shaft.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a compact belt-driven numerical control belt sander capable of sanding a special-shaped part using a soft rubber shaft without tensioning a sanding belt.

A compression type abrasive belt transmission numerical control abrasive belt machine comprises a fixed mounting frame, a workpiece grinding device, an abrasive belt and an abrasive belt transmission device for driving the abrasive belt to rotate, wherein the abrasive belt transmission device comprises a driving wheel, a driven wheel, a tension abrasive belt wheel and a compression abrasive belt wheel, the tension abrasive belt wheel is used for adjusting the tightness of the abrasive belt, and the compression abrasive belt wheel compresses the abrasive belt on the surface of the driving wheel so that the driving wheel drives the abrasive belt to rotate; the workpiece grinding device comprises a soft rubber shaft, the abrasive belt is wound on the outer side of the soft rubber shaft and rotates along the outer side of the soft rubber shaft, the abrasive belt is tightly attached to the outer side of the soft rubber shaft, the shape of the soft rubber shaft deforms along with the shape of the workpiece with the irregular shape and is tightly attached to the workpiece with the irregular shape, and the abrasive belt is used for grinding the workpiece with the irregular shape.

Preferably, the abrasive belt is connected end to form a closed abrasive belt ring, the abrasive belt comprises a belt abrasive surface and a back surface opposite to the belt abrasive surface, and the belt abrasive surface is the outer side surface of the abrasive belt ring; the abrasive belt is arranged on the surfaces of the driving wheel, the driven wheel and the tensioning abrasive belt wheel in a surrounding mode, the driven wheel, the tensioning abrasive belt wheel and the pressing abrasive belt wheel act on the inner side of the abrasive belt ring, the driving wheel acts on the outer side of the abrasive belt ring, and the surface of the driving wheel is in close contact with a belt abrasive surface of the abrasive belt.

Preferably, the pressing abrasive belt wheel and the driven wheel are arranged on the same side surface of the driving wheel, and the abrasive belt sequentially bypasses the driving wheel and the driven wheel after passing through a gap between the pressing abrasive belt wheel and the driving wheel; the contact surface of the pressing abrasive belt wheel and the driving wheel is positioned on the vertical direction of the axis of the driving wheel and deviates a preset angle to the left, the vertical direction of the axis of the driven wheel is positioned on the vertical direction of the axis of the driving wheel and deviates a preset angle to the right, the contact area between the abrasive belt and the driving wheel depends on the distance between the driven wheel and the pressing abrasive belt wheel, the driven wheel is made to be close to the pressing abrasive belt wheel as much as possible, so that the contact area between the abrasive belt and the driving wheel is maximized, and the friction force between the driving wheel and the abrasive belt is increased.

Preferably, the pressing abrasive belt wheel comprises a fixed support, a movable support, a push-pull cylinder and a wheel shaft, the pressing abrasive belt wheel is installed on the fixed installation frame through the fixed support, and the wheel shaft is arranged on one side of the driving wheel and presses the abrasive belt on the driving wheel.

Preferably, the wheel axle comprises a first axle core, a steel axle and a rubber axle, the steel axle is rotatably sleeved on the outer side of the first axle core, the rubber axle is sleeved on the outer side of the steel axle, and the rubber axle and the steel axle are in interference fit.

Preferably, both ends of the first shaft core are fixedly connected to the movable support, the push-pull cylinder is provided with a movable rod, the top end of the movable rod is fixedly connected to the movable support, and the movable rod of the push-pull cylinder drives the movable rod and the wheel shaft to move.

Preferably, the tensioning abrasive belt wheel comprises a second shaft core, the abrasive belt transmission device further comprises a tensioning wheel rotating sliding plate, a sliding plate rotating shaft and a sliding plate adjusting cylinder, one end of the tensioning wheel rotating sliding plate is connected to the second shaft core, the other end of the tensioning wheel rotating sliding plate is connected to the sliding plate rotating shaft, the sliding plate adjusting cylinder is arranged below the tensioning wheel rotating sliding plate and is close to one end of the tensioning abrasive belt wheel, and the sliding plate adjusting cylinder changes the inclination of the tensioning wheel rotating sliding plate through the extension and contraction of a cylinder ejector rod and adjusts the height of the tensioning abrasive belt wheel, so as to adjust the tightness of the abrasive belt.

Preferably, the workpiece grinding device comprises a grinding head frame, and the soft rubber shaft is mounted on the grinding head frame through a bearing seat.

Preferably, the workpiece grinding device is arranged below the workpiece moving device, the workpiece grinding device is used for grinding a workpiece to be machined placed on the workpiece moving device, the workpiece moving device comprises a moving mechanism and a workpiece fixture, the moving mechanism comprises a lifting module and a horizontal moving module, the horizontal moving module is arranged above the lifting module, the workpiece fixture is arranged above the horizontal moving module, and the lifting module and the horizontal moving module drive the workpiece fixture to move in a machining space.

Preferably, an electric control magnetic table is arranged above the horizontal moving module, and the workpiece fixture is arranged on the electric control magnetic table and is opened and closed under the control of the electric control magnetic table so as to clamp the workpiece to be processed.

In the compression type abrasive belt transmission numerical control abrasive belt machine, the driving wheel and the driven wheel drive the abrasive belt to rotate, the tensioning abrasive belt wheel is used for adjusting the tightness of the abrasive belt, the compression abrasive belt wheel compresses the abrasive belt on the outer surface of the driving wheel, the abrasive belt surface of the abrasive belt is compressed and attached to the outer surface of the driving wheel, the abrasive belt surface of the abrasive belt is wound on the outer surface of the driving wheel, and when the driving wheel rotates, the abrasive belt rotates under the driving of the driving wheel to polish and polish a workpiece to be processed. And for the groove or the inner angle of the surface of the workpiece with the irregular shape, the abrasive belt is wound on the outer surface of the soft rubber shaft, and the shapes of the abrasive belt and the soft rubber shaft deform along with the shape of the workpiece with the irregular shape, so that the abrasive belt is fully contacted with the workpiece with the irregular shape, and the grinding and polishing of the workpiece with the irregular shape are completed. The abrasive belt has a rough belt abrasive surface and an increased friction force with the driving wheel, so that the driving force of the driving wheel on the abrasive belt is increased, the tensioning abrasive belt wheel only needs to slightly straighten the abrasive belt without being too tight, and the abrasive belt can be attached to the appearance of a workpiece with an irregular shape through the soft rubber shaft in the grinding process, so that a more ideal effect is achieved in the grinding process. The product of the utility model is simple in structure, easy to produce, low in cost, convenient to popularize.

Drawings

Fig. 1 is a schematic structural view of a compact belt drive numerical control belt sander according to an embodiment of the present invention.

Fig. 2 is a front view of a compression belt drive numerical control belt sander according to an embodiment of the present invention.

Fig. 3 is the structural schematic diagram of the compressing abrasive belt wheel of the compressing abrasive belt transmission numerical control abrasive belt machine of the embodiment of the utility model.

Fig. 4 is a top view of the compressing abrasive belt wheel of the compressing abrasive belt drive numerical control abrasive belt machine according to the embodiment of the present invention.

Fig. 5 is a cross-sectional view of the pressing abrasive belt wheel of the pressing abrasive belt drive numerical control abrasive belt machine according to the embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and drawings.

Referring to fig. 1 and fig. 2, a pressing type abrasive belt transmission numerical control abrasive belt machine 100 according to an embodiment of the present invention is shown, including a fixed mounting frame 10, a workpiece moving device 20, a workpiece grinding device 30, an abrasive belt 40, and an abrasive belt transmission device 50 for driving the abrasive belt 40 to rotate, where the workpiece moving device 20 is disposed below the workpiece grinding device 30, the workpiece grinding device 30 is used for grinding a workpiece 200 to be processed placed on the workpiece moving device 20, the abrasive belt transmission device 50 includes a driving wheel 51, a driven wheel 52, a tensioning abrasive belt wheel 53, and a pressing abrasive belt wheel 54, the tensioning abrasive belt wheel 53 is used for adjusting the tightness of the abrasive belt 40, and the pressing abrasive belt wheel 54 presses the abrasive belt 40 onto the surface of the driving wheel 51, so that the driving wheel 51 drives the abrasive belt 40 to rotate; the workpiece grinding device 30 comprises a soft rubber shaft 32, the abrasive belt 40 is wound on the outer side of the soft rubber shaft 32 and rotates along the outer side of the soft rubber shaft 32, the abrasive belt 40 is tightly attached to the outer side of the soft rubber shaft 32, the shape of the soft rubber shaft 32 deforms along with the shape of the workpiece with the irregular shape and is tightly attached to the workpiece with the irregular shape, and the abrasive belt 40 is used for grinding the workpiece with the irregular shape.

Specifically, the soft rubber shaft 32 is used for grinding a special-shaped workpiece with an irregular shape. The soft rubber shaft 32 has elasticity, and can deform along with a special-shaped workpiece, so that the abrasive belt 40 on the outer side of the soft rubber shaft 32 deforms at the same time and is tightly attached to the special-shaped workpiece, the special-shaped workpiece is polished by using the soft rubber shaft 32 without tensioning the abrasive belt 40, the abrasive belt 40 can be pressed on the driving wheel 51 by the pressing abrasive belt wheel 54 to drive the abrasive belt 40 to rotate, the abrasive belt 40 can have elasticity in the polishing process, the polishing of the special-shaped workpiece is realized, and a good polishing effect is generated.

Compared with the conventional technical scheme that the friction force between the abrasive belt and the driving wheel is increased by tightening the abrasive belt, the pressing type abrasive belt transmission numerical control abrasive belt machine 100 in the technical scheme is more suitable for flexible shafts, such as a soft rubber shaft and a polishing shaft with good elasticity, in this embodiment, the pressing abrasive belt wheel 54 is used for pressing the abrasive belt 40 on the driving wheel 51, so that the abrasive belt 40 which bypasses the soft rubber shaft 32 is not tightened too tightly, the soft rubber shaft 32 and the abrasive belt 40 are more easily attached to a special-shaped workpiece, and the grinding of the special-shaped workpiece is completed.

The abrasive belt transmission device 50 and the workpiece grinding device 30 are fixedly mounted on one side of the fixed mounting frame 10, and the workpiece grinding device 30 is arranged below the abrasive belt transmission device 50.

Preferably, the sanding belt 40 is connected end to form a closed sanding belt ring, the sanding belt 40 comprises a sanding surface and a back surface opposite to the sanding surface, and the sanding surface is the outer side surface of the sanding belt ring; the abrasive belt is arranged around the surfaces of the driving wheel 51, the driven wheel 52 and the tension abrasive belt wheel 53, the driven wheel 52, the tension abrasive belt wheel 53 and the compression abrasive belt wheel 54 act on the inner side of the abrasive belt ring, namely, are in contact with the back surface of the abrasive belt 40, the driving wheel 51 acts on the outer side of the abrasive belt ring, and the surface of the driving wheel 51 is in close contact with the abrasive surface of the abrasive belt 40.

Preferably, the pressing abrasive belt wheel 54 and the driven wheel 52 are disposed on the same side of the driving wheel 51, and the abrasive belt 40 sequentially bypasses the driving wheel 51 and the driven wheel 52 after passing through a gap between the pressing abrasive belt wheel 54 and the driving wheel 51.

Specifically, the distance between the pressing abrasive belt wheel 54 and the driven wheel 52 is small, and depending on the winding direction of the abrasive belt 40, the abrasive belt 40 firstly passes through the gap between the pressing abrasive belt wheel 54 and the driving wheel 51, then winds around the outer surface of the driving wheel 51, and finally adjusts the rotation direction of the abrasive belt 40 through the driven wheel 52.

In this embodiment, the contact surface between the pressing abrasive belt wheel 54 and the driving pulley 51 is located at a predetermined angle, such as 5 to 30 degrees, left in the vertical direction of the axis of the driving pulley 51. The vertical direction of the axis of the driven wheel 52 is deviated from the vertical direction of the axis of the driving wheel 51 to the right by a preset angle, for example, 10 to 30 degrees. The pinch belt pulley 54 and the driven pulley 52 are spaced apart to avoid friction on the rotating belt 40 itself.

Preferably, referring to fig. 3, 4 and 5, the structure of the pressing abrasive belt wheel 54 is shown, the pressing abrasive belt wheel 54 includes a fixed bracket 541, a movable bracket 542, a push-pull cylinder 543 and an axle, the pressing abrasive belt wheel 54 is mounted on the fixed mounting frame 10 through the fixed bracket 541, and the axle is disposed at one side of the driving wheel 51 and presses the abrasive belt 40 on the driving wheel 51. The wheel axle comprises a first axle core 544, a steel axle 545 and a rubber axle 546, wherein the steel axle 545 is rotatably sleeved on the outer side of the first axle core 544, the rubber axle 546 is sleeved on the outer side of the steel axle 545, and the rubber axle 546 and the steel axle 545 are in interference fit. Two ends of the first shaft core 544 are fixedly connected to the movable bracket 542, the push-pull cylinder 543 has a movable rod, a top end of the movable rod is fixedly connected to the movable bracket 542, and the movable rod of the push-pull cylinder 543 drives the movable rod and the wheel shaft to move.

Specifically, the closer distance between the pressing belt wheel 54 and the driven wheel 52 allows the belt 40 to be tightly wound around the outer surface of the driving wheel 51, increasing the length of the belt 40 passing around the driving wheel 51 and increasing the contact area between the belt 40 and the driving wheel 51.

The contact area between the sanding belt 40 and the drive wheel 51 depends on the distance between the driven wheel 52 and the pressing sanding belt wheel 54, and the driven wheel 52 is brought as close as possible to the pressing sanding belt wheel 54 on the premise that the sanding belt 40 between the driven wheel 52 and the pressing sanding belt wheel 54 does not emit friction, so that the contact area between the sanding belt 40 and the drive wheel 51 is maximized to increase the friction between the drive wheel 51 and the sanding belt 40.

In the present embodiment, the contact length between the belt 40 and the drive pulley 51 from the pressed position by the pressing belt pulley 54 to the detour from the drive pulley 51 to the driven pulley 52 is at least 80% of the outer circumference of the drive pulley 51.

Preferably, the tension pulley 53 includes a second shaft core, the belt transmission device 50 further includes a tension pulley rotating slide plate 532, a slide plate rotating shaft 531 and a slide plate adjusting cylinder 533, one end of the tension pulley rotating slide plate 532 is connected to the second shaft core, the other end of the tension pulley rotating slide plate 532 is connected to the slide plate rotating shaft 531, the slide plate adjusting cylinder 533 is disposed below the tension pulley rotating slide plate 532 and is close to one end of the tension pulley 53, and the slide plate adjusting cylinder 533 changes the inclination of the tension pulley rotating slide plate 532 through extension and contraction of a cylinder rod to adjust the height of the tension pulley 53, so as to adjust the tightness of the belt 40.

Specifically, the sliding plate adjusting cylinder 533 pushes up the tension wheel rotating sliding plate 532 through a cylinder push rod, and the tension wheel rotating sliding plate 532 rotates around the sliding plate rotating shaft 531 as a rotating axis, so that the tension belt pulley 53 moves upwards, and the belt 40 is tightened; on the contrary, when the cylinder push rod is contracted, the tensioning wheel rotating slide plate 532 rotates in the opposite direction by using the slide plate rotating shaft 531 as an axis, so that the tensioning abrasive belt wheel 53 moves downwards, and the abrasive belt 40 is loosened.

Specifically, the abrasive belt transmission device 50 further includes a driving motor, the driving motor is fixedly installed on the fixed installation frame 10, the driving motor is used for driving the driving wheel 51 to rotate, and the driving wheel 51 rotates to drive the abrasive belt 40 to move.

Preferably, the workpiece grinding device 30 is fixedly mounted on the fixed mounting frame 10. The workpiece grinding device 30 includes a grinding head frame 31, and the soft rubber shaft 32 is mounted on the grinding head frame 31 through a bearing seat.

Preferably, the workpiece moving device 20 includes a moving mechanism and a workpiece fixture 24, the moving mechanism includes a lifting module and a horizontal moving module 22, the horizontal moving module 22 is disposed above the lifting module, the workpiece fixture 24 is disposed above the horizontal moving module 22, and the lifting module and the horizontal moving module 22 drive the workpiece fixture 24 to move in the processing space. An electric control magnetic table 23 is arranged above the horizontal moving module 22, and the workpiece fixture 24 is arranged on the electric control magnetic table 23 and is opened and closed under the control of the electric control magnetic table 23 so as to clamp the workpiece 200 to be processed.

Specifically, the lifting module includes a movable mounting frame 21, the movable mounting frame 21 includes a fixed part and a lifting part, the lifting part is connected with the fixed part through a slide rail, and the lifting part moves up and down along the slide rail, so that the horizontal movement module 22 and the workpiece fixture 24 move synchronously.

Specifically, the horizontal movement module 22 includes a front-back movement sliding plate and a left-right movement sliding plate, the front-back movement sliding plate and the left-right movement sliding plate control the workpiece fixture 24 to move horizontally in the X-axis direction and the Y-axis direction, and the lifting module controls the workpiece fixture 24 to move up and down in the Z-axis direction, so that the workpiece fixture 24 drives the workpiece 200 to be processed to move to any position in the processing space under the control of the moving mechanism.

Specifically, when the outer plane of the workpiece is polished, the workpiece 200 to be processed is placed on the workpiece fixture 24, the workpiece fixture 24 clamps the workpiece 200 to be processed, the driving wheel 51 is driven by the driving motor to rotate, the driving wheel 51 drives the abrasive belt 40 to rotate, the abrasive belt 40 passes through the driving wheel 51, the driven wheel 52, the tensioning abrasive belt wheel 53 and the soft rubber shaft 32, the slide plate adjusting cylinder 533 adjusts the position of the tensioning abrasive belt wheel 53, tensions the abrasive belt 40, so that the abrasive belt 40 rotates along with the driving wheel 51, and the workpiece moving device 20 moves the workpiece 200 to be processed to the soft rubber shaft 32 for polishing.

When the workpiece 200 to be machined is a special-shaped workpiece with an irregular shape, the soft rubber shaft 32 is mounted on the grinding head frame 31, the soft rubber shaft 32 deforms with the abrasive belt 40 and is attached to the surface of the special-shaped workpiece, the pressing abrasive belt wheel 54 presses the abrasive belt 40 against the outer surface of the driving wheel 51, the abrasive belt 40 is wound on the driving wheel 51, the contact area and the friction force between the abrasive belt 40 and the driving wheel 51 are increased, the driving force for the abrasive belt 40 is increased when the driving wheel 51 rotates, and at this time, the tensioning abrasive belt wheel 53 can ensure the rotation moment of the abrasive belt 40 without tensioning the abrasive belt 40 too tightly, so that the grinding and polishing of the special-shaped workpiece are realized.

In the above-mentioned pressing type abrasive belt transmission numerical control abrasive belt machine 100, the driving wheel 51 and the driven wheel 52 drive the abrasive belt 40 to move, the tensioning abrasive belt wheel 53 is used for adjusting the tightness of the abrasive belt 40, the pressing abrasive belt wheel 54 presses the abrasive belt 40 on the outer surface of the driving wheel 51, the abrasive belt surface of the abrasive belt 40 is pressed and attached to the outer surface of the driving wheel 51, the abrasive belt surface of the abrasive belt 40 is wound on the outer surface of the driving wheel 51, and when the driving wheel 51 rotates, the abrasive belt 40 rotates under the driving of the driving wheel 51 to polish and polish the workpiece to be processed. For the groove or the inner angle of the surface of the workpiece with the irregular shape, the abrasive belt 40 is wound on the outer surface of the soft rubber shaft 32, the shapes of the abrasive belt 40 and the soft rubber shaft 32 are deformed along with the shape of the workpiece with the irregular shape, so that the abrasive belt 40 is in full contact with the workpiece with the irregular shape, and the workpiece with the irregular shape is ground and polished. Because the abrasive belt 40 has a rough abrasive surface and the friction force between the abrasive belt 40 and the driving wheel 51 is increased, the driving force of the driving wheel 51 on the abrasive belt 40 is increased, so that the tensioning abrasive belt wheel 53 only needs to slightly straighten the abrasive belt 40 without being too tight, and in the grinding process, the abrasive belt 40 can be attached to the appearance of a workpiece with an irregular shape through the soft rubber shaft 32, so that a more ideal effect is achieved. The product of the utility model is simple in structure, easy to produce, low in cost, convenient to popularize.

It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the inventive spirit of the present invention, and all changes made according to the inventive spirit of the present invention should be included in the scope of the claimed invention.

Claims (10)

1. A pressing type abrasive belt transmission numerical control abrasive belt machine comprises a fixed mounting frame, a workpiece grinding device, an abrasive belt and an abrasive belt transmission device for driving the abrasive belt to rotate, and is characterized in that the abrasive belt transmission device comprises a driving wheel, a driven wheel, a tensioning abrasive belt wheel and a pressing abrasive belt wheel, the tensioning abrasive belt wheel is used for adjusting the tightness of the abrasive belt, and the pressing abrasive belt wheel presses the abrasive belt on the surface of the driving wheel so that the driving wheel drives the abrasive belt to rotate; the workpiece grinding device comprises a soft rubber shaft, the abrasive belt is wound on the outer side of the soft rubber shaft and rotates along the outer side of the soft rubber shaft, the abrasive belt is tightly attached to the outer side of the soft rubber shaft, the shape of the soft rubber shaft deforms along with the shape of the workpiece with the irregular shape and is tightly attached to the workpiece with the irregular shape, and the abrasive belt is used for grinding the workpiece with the irregular shape.

2. A belt machine as claimed in claim 1 wherein said belt is connected end to form a closed belt loop, said belt comprising a belt sand surface and a back surface opposite said belt sand surface, said belt sand surface being an outer side of said belt loop; the abrasive belt is arranged on the surfaces of the driving wheel, the driven wheel and the tensioning abrasive belt wheel in a surrounding mode, the driven wheel, the tensioning abrasive belt wheel and the pressing abrasive belt wheel act on the inner side of the abrasive belt ring, the driving wheel acts on the outer side of the abrasive belt ring, and the surface of the driving wheel is in close contact with the belt abrasive surface of the abrasive belt.

3. The belt sander with compact belt drive according to claim 1, wherein said compact belt pulley and said driven pulley are disposed on the same side of said drive pulley, and said sanding belt sequentially bypasses said drive pulley and said driven pulley after passing through the gap between said compact belt pulley and said drive pulley; the contact surface of the pressing abrasive belt wheel and the driving wheel is positioned on the vertical direction of the axis of the driving wheel and deviates a preset angle to the left, the vertical direction of the axis of the driven wheel is positioned on the vertical direction of the axis of the driving wheel and deviates a preset angle to the right, the contact area between the abrasive belt and the driving wheel depends on the distance between the driven wheel and the pressing abrasive belt wheel, the driven wheel is made to be close to the pressing abrasive belt wheel as much as possible, so that the contact area between the abrasive belt and the driving wheel is maximized, and the friction force between the driving wheel and the abrasive belt is increased.

4. The belt sander with compact belt drive according to claim 2, wherein said compact belt wheel comprises a fixed bracket, a movable bracket, a push-pull cylinder and a wheel shaft, said compact belt wheel is mounted on said fixed mounting bracket through said fixed bracket, said wheel shaft is disposed on one side of said driving wheel and compacts said belt on said driving wheel.

5. A belt sander as set forth in claim 4, wherein said axle comprises a first core, a steel shaft, and a rubber shaft, said steel shaft is rotatably sleeved outside said first core, said rubber shaft is sleeved outside said steel shaft, and said rubber shaft and said steel shaft are in interference fit.

6. A belt sander as set forth in claim 5, wherein said first core is fixedly attached at both ends to said movable frame, said push-pull cylinder has a movable rod, said movable rod is fixedly attached at its top end to said movable frame, said movable rod of said push-pull cylinder moves said movable rod and said wheel axle.

7. A belt sander as set forth in claim 1, wherein said tension pulley comprises a second shaft, said belt drive further comprises a tension pulley rotating slide, a slide rotating shaft, and a slide adjusting cylinder, wherein one end of said tension pulley rotating slide is connected to said second shaft, the other end of said tension pulley rotating slide is connected to said slide rotating shaft, said slide adjusting cylinder is disposed below said tension pulley rotating slide and near one end of said tension pulley, said slide adjusting cylinder changes the inclination of said tension pulley rotating slide by the extension and contraction of the cylinder rod, and adjusts the height of said tension pulley, thereby adjusting the tightness of said belt.

8. A belt sander with belt drive control as set forth in claim 1 wherein said workpiece grinding means comprises a head frame, said soft rubber spindle being mounted to said head frame by a bearing mount.

9. The belt sander as set forth in claim 1, further comprising a workpiece moving device disposed below said workpiece grinding device, said workpiece grinding device being used to grind a workpiece to be machined placed on said workpiece moving device, said workpiece moving device comprising a moving mechanism and a workpiece fixture, said moving mechanism comprising a lifting module and a horizontal moving module, said horizontal moving module being disposed above said lifting module, said workpiece fixture being disposed above said horizontal moving module, said lifting module and said horizontal moving module driving said workpiece fixture to move within the machining space.

10. A belt sander with a belt clamp according to claim 9, wherein an electrically controlled magnetic table is disposed above the horizontal moving module, and the workpiece fixture is disposed on the electrically controlled magnetic table and is controlled by the electrically controlled magnetic table to open and close to clamp the workpiece to be machined.

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