A sandpaper automatic changing device for machine tools

Abstract

An automatic sandpaper changing device for a machine tool, the machine tool comprises a first inner side wall, a rocker arm rotatably connected to the first inner side wall, a driving device fixed to the first inner side wall, a material barrel and a storage box; a vacuum suction cup and a clamp are provided on the rocker arm, and the vacuum suction cup is located at the top of the rocker arm; the material barrel is located above the rocker arm, and a first bin body for storing new sandpaper is provided inside the material barrel, and a discharge port is also provided; the storage box is located below the rocker arm; the output end of the driving device is connected to the rocker arm, and is used to drive the rocker arm to rotate to abut against the first inner side wall, or drive the vacuum suction cup to rotate to a position opposite to the discharge port or the sticking surface of the sticking disc of the grinding tool, or drive the clamp to the side of the sticking surface of the sticking disc. Compared with the prior art, the automatic sandpaper changing device of the present invention can occupy a small space, so that the structure can be set inside the machine tool to realize the function of automatically changing sandpaper.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic sandpaper replacement devices, and in particular relates to an automatic sandpaper replacement device for a machine tool. Background Art

[0002] For product processing that requires a grinding and polishing process, in order to improve processing efficiency, the prior art has a connection structure of a grinding device set as a tapered shank structure, so that the grinding device is suitable for a machine tool spindle (hereinafter referred to as such a grinding device is referred to as a "grinding tool"). For example, the pneumatic grinding tool for a machine tool provided by the patent with publication number CN112548793A can be installed on the spindle of the machine tool. When a grinding and polishing process is required, only a tool change operation needs to be performed to replace the grinding device so as to grind and polish the product, which improves processing efficiency.

[0003] After the grinding device has been used for a period of time, the sandpaper on the sticky disc needs to be replaced. In the prior art, there is a structure for automatically replacing sandpaper, including a tearing structure for tearing off the sandpaper on the sticky disc, a collecting device for collecting the torn sandpaper, a material barrel for storing new sandpaper, and an ejection mechanism arranged under the material barrel to lift the new sandpaper upward so that the sandpaper at the top is attached to the sticky disc of the grinding device. The grinding device is arranged on a mechanical arm, and the mechanical arm has a certain degree of freedom, so that it can drive the sticky disc to move to the corresponding position of the tearing structure and the material barrel, so as to realize the automatic replacement of sandpaper.

[0004] Since the machine tool spindle has less freedom of movement than the robot arm, if the above-mentioned existing structure for replacing sandpaper is adopted, the spindle cannot drive the grinding tool to move to the tearing structure and the material barrel to replace the sandpaper. If two moving mechanisms are set to drive the tearing structure and the material barrel to move respectively to replace the sandpaper, due to the limited space inside the machine tool, the available space is small, which will occupy the internal processing space of the machine tool, affect the machine tool processing, bring great inconvenience to the processing, and even cause interference. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an automatic sandpaper changing device for a machine tool.

[0006] To achieve the above objectives, the present invention discloses an automatic sandpaper replacement device for a machine tool, the machine tool comprising a first inner side wall, a rocker arm rotatably connected to the first inner side wall, a driving device fixed to the first inner side wall, a material barrel and a storage box;

[0007] The rocker arm is provided with a vacuum suction cup and a clamp, and the vacuum suction cup is located at the top of the rocker arm;

[0008] The material barrel is located above the rocker arm, and is provided with a first storage body for storing new sandpaper and a material outlet;

[0009] The storage box is located below the rocker arm;

[0010] The output end of the driving device is connected to the rocker arm, and is used to drive the rocker arm to rotate to be close to the first inner wall, and can drive the vacuum suction cup to rotate to a position relative to the discharge port and the sticking surface of the sticking disc of the grinding tool, and can drive the clamp to the side of the sticking surface of the sticking disc.

[0011] Preferably, the discharge port is located at the bottom of the barrel, and the discharge port is provided with a limiting structure for preventing sandpaper from falling.

[0012] Further preferably, the shape of the vacuum suction cup is adapted to the adhesive cup, and a plurality of vacuum suction nozzles are provided on the vacuum suction cup.

[0013] Further preferably, an avoidance groove is provided at a position where the vacuum suction cup is opposite to the vacuum suction nozzle.

[0014] Preferably, a feed port is provided on the top of the material barrel, and the first warehouse body is covered with a pressure cover which can slide along the first warehouse body from the feed port.

[0015] Preferably, the rocker arm includes a main arm, a first transmission member, a motor, and a second transmission member connected to the first transmission member, the main arm is rotatably connected to the first inner wall, the first transmission member is arranged on the main arm, one end of which is connected to the output end of the motor, and is used to drive the second transmission member to move under the drive of the motor; the suction cup and the clamp are connected to the second transmission member.

[0016] Further preferably, the suction cup includes a base, a buffer structure and a disk surface, the base and the disk surface are connected via the buffer structure, and the disk surface is provided with adsorption holes.

[0017] Further preferably, the buffer structure comprises a support column, an elastic member and a connecting column, and the support column and the connecting column are connected by the elastic member;

[0018] One of the supporting column and the connecting column is connected to the base, and the other is connected to the disk surface;

[0019] There are multiple buffer structures, and the multiple buffer structures are evenly distributed.

[0020] Further preferably, the support column and / or the connecting column is a telescopic rod.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The vacuum suction cup and the clamp are both set on the rocker arm, and the vacuum suction cup is located at the top of the rocker arm. When changing the sandpaper, the rocker arm drives the vacuum suction cup to move to the discharge port to absorb the new sandpaper, and then the rocker arm moves to the specified position in the machine tool. The machine tool spindle moves the grinding tool to the side of the clamp, and the clamp clamps the old sandpaper to tear it off. After tearing off the old sandpaper, the grinding tool moves to the top of the vacuum suction cup and moves down, so that the new sandpaper is attached to the grinding tool. After changing the sandpaper, the rocker arm rotates to abut against the first inner wall, and at the same time releases the clamp, so that the old sandpaper falls into the storage box, and finally the function of automatically changing the sandpaper is realized in the limited internal space of the machine tool.

[0023] In the above, the vacuum suction cup and the clamp are both arranged on the rocker arm, and there is no need to set up two moving mechanisms to drive the vacuum suction cup and the clamp to move for tearing and replacement. Compared with the above, the structure is simpler and smaller in size, which can reduce the internal space occupied by the machine tool, and finally realize the function of automatically replacing sandpaper in the machine tool. In addition, the rocker arm can drive the vacuum suction cup and the clamp to obtain new sandpaper, tear off old sandpaper, replace new sandpaper, and recycle old sandpaper. The whole process is completed in one go, takes less time, and improves the replacement efficiency and the processing efficiency of the machine tool.

[0024] The rocker arm is rotatably arranged on the inner wall of the machine tool. When the sandpaper does not need to be replaced, the rocker arm can be rotated to be close to the first inner wall to avoid affecting the product processing of the machine tool spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the automatic sandpaper changing device for machine tools of the present invention;

[0026] Figure 2 It is a three-dimensional structural schematic diagram of another viewing angle of the sandpaper automatic changing device for machine tools of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the vacuum suction cup and the clamp;

[0028] A first inner side wall 1;

[0029] Rocker arm 2; main arm 21; first transmission member 22; motor 23; second transmission member 24; guide rail 25; slider 26;

[0030] Driving device 3;

[0031] Barrel 4; first storage body 41; discharge port 42; limiting structure 43; feed port 44; pressure cover 45;

[0032] Storage box 5;

[0033] Vacuum suction cup 6; vacuum suction nozzle 61; avoidance groove 62; base 63; buffer structure 64; support column 641; connecting column 642; disk surface 65;

[0034] Clamp 7;

[0035] Sandpaper windows8. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] An automatic sandpaper changing device for a machine tool, wherein the machine tool includes a first inner side wall 1, which can be preferably located away from a processing area and in a relatively large space. The automatic sandpaper changing device includes a rocker arm 2 rotatably connected to the first inner side wall 1, a driving device 3 fixed to the first inner side wall 1, a material barrel 4 and a storage box 5. The rocker arm 2 is provided with a vacuum suction cup 6 and a clamp 7, and the vacuum suction cup 6 is located at the top of the rocker arm 2. The clamp 7 is preferably a pneumatic drive structure, so that the vacuum suction cup 6 and the clamp 7 can share a power source without setting up two power structures, and the structure is simple and the cost is low. The material barrel 4 is located above the rocker arm 2, and is provided with a first bin 41 for storing new sandpaper inside, and is also provided with a discharge port 42; the storage box 5 is located below the rocker arm 2. The output end of the driving device 3 is connected to the rocker arm 2, and is used to drive the rocker arm 2 to rotate to be close to the first inner wall 1, and can drive the vacuum suction cup 6 to rotate to a position relative to the discharge port 42 or the sticking surface of the sticking disc of the grinding tool, and can drive the clamp 7 to the side of the sticking surface of the sticking disc.

[0038] The above automatic sandpaper replacement device sets the vacuum suction cup 6 and the clamp 7 on the rocker arm 2, and the vacuum suction cup 6 is located at the top of the rocker arm 2. When replacing the sandpaper, the rocker arm 2 drives the vacuum suction cup 6 to move to the discharge port 42 to absorb the new sandpaper, and then the rocker arm 2 moves to the specified position in the machine tool, and the machine tool spindle moves the grinding tool to the side of the clamp 7. The clamp 7 clamps the old sandpaper and the grinding tool moves to the side and upward to tear off the old sandpaper. After tearing off the old sandpaper, the grinding tool moves to the top of the vacuum suction cup 6 and moves down, so that the new sandpaper is attached to the grinding tool. After replacing the sandpaper, the rocker arm 2 rotates to abut against the first inner wall 1 to prevent it from occupying the internal processing space of the machine tool and affecting the product processing. At the same time, the clamp 7 is released, so that the old sandpaper falls into the storage box 5, and finally the automatic replacement of the sandpaper in the machine tool is completed. In the above, the vacuum suction cup 6 and the clamp 7 are both arranged on the rocker arm 2, and there is no need to arrange two moving mechanisms to drive the vacuum suction cup 6 and the clamp 7 to move for tearing and replacing. Compared with the above, the structure is simpler and smaller in size, which can reduce the occupation of the internal space of the machine tool, and finally realize the function of automatically replacing the sandpaper in the limited internal space of the machine tool. The rocker arm 2 can drive the vacuum suction cup 6 and the clamp 7 to obtain new sandpaper, tear old sandpaper, replace new sandpaper, and recycle old sandpaper. The whole process is completed in one go, takes less time, and improves the replacement efficiency and the processing efficiency of the machine tool.

[0039] It should be noted that when the inventor realizes the automatic replacement of sandpaper in the machine tool, the clamp 7 is initially fixed on the first inner wall 1. When the sandpaper needs to be replaced, the spindle drives the grinding tool to move to the side of the clamp 7 to tear off the old sandpaper, and then the grinding tool and the rocker arm 2 are moved to make the two positions relative to each other, and the new sandpaper is pasted on the die cutter. However, this structure is not only complex in structure, but also occupies the internal space of the machine tool when in use, which is not conducive to the later product processing. The present invention cleverly sets the clamp 7 on the rocker arm 2, so that the entire structure is simpler and smaller in size. At the same time, when the sandpaper does not need to be replaced, it can be moved to be close to the first inner wall 1 without affecting product processing.

[0040] In this embodiment, the discharge port 42 is located at the bottom of the barrel 4, and the discharge port 42 is provided with a limiting structure 43 for preventing the sandpaper from falling, preferably a plurality of evenly distributed buckles. By setting the discharge port 42 at the bottom of the barrel 4, the position is matched with the position of the vacuum suction cup 6 and the sticking plate of the grinding tool, so that when obtaining a new setting and fixing the new sandpaper to the sticking plate, the vacuum suction cup 6 can obtain and fix the sandpaper by translational movement. Compared with setting the discharge port 42 at the top position as in the prior art, the rocker arm 2 does not need to be provided with a structure for flipping the vacuum suction cup 6 downward, and the structure is simpler, reducing the volume occupation and cost. In the process of obtaining sandpaper, the rocker arm 2 drives the vacuum suction cup 6 to move to a position relative to the discharge port 42, and then the sandpaper can be automatically absorbed and obtained. Compared with the prior art in which all the sandpaper in the barrel 4 is ejected and the sandpaper at the top is pasted on the sticky plate, the pasting position of the sandpaper is more accurate, and the sandpaper can be pasted on the sticky plate, which is conducive to improving the grinding and polishing effect, and avoiding the problem of misalignment of the sandpaper pasting position, resulting in part of the sandpaper not being able to be pasted on the sticky plate, and the grinding process cannot be performed, which reduces the grinding effect. In addition, after the sandpaper is obtained, the sandpaper in the barrel 4 is automatically unloaded under the action of its own gravity, and the structure is simple.

[0041] Among them, the shape of the vacuum suction cup 6 is adapted to the sticky disc, and the shape of the vacuum suction cup 6 is adapted to the sticky disc, and preferably can be the same, so that when the new sandpaper is fixed to the sticky disc, the entire sandpaper can be pressed to the sticky surface of the sticky disc by the vacuum suction cup 6, which improves the sticking effect of the sandpaper and ensures the reliability of use during the grinding process. The vacuum suction cup 6 is provided with multiple vacuum suction nozzles 61, which is convenient for adsorbing and obtaining new settings, and can also ensure that the new sandpaper can be fixed to the sticky disc of the grinding tool. Specifically, in the process of obtaining the vacuum suction nozzle 61, the vacuum suction cup 6 cannot extend into the material barrel 4 to absorb the new setting due to the existence of the limiting structure 43 of the material barrel 4, which hinders the acquisition of new sandpaper. By providing multiple vacuum suction nozzles 61, the vacuum suction nozzle 61 can extend into the bottom of the material barrel 4 and contact the bottom of the new sandpaper. The new sandpaper can be pulled out of the material barrel 4 under the action of vacuum suction, which is convenient for obtaining new sandpaper. In addition, since the vacuum nozzle 61 is generally made of an elastic and flexible material, when the sandpaper is pressed onto the adhesive plate, the adhesive plate is deformed without causing interference, thereby improving the adhesive effect of the sandpaper.

[0042] Furthermore, in order to reduce the influence of the vacuum suction nozzle 61 on the sticking effect of the new sandpaper and further improve the sticking effect of the new sandpaper, an avoidance groove 62 is provided at the position relative to the vacuum suction cup 6 and the vacuum suction nozzle 61, so that when the new sandpaper is pressed onto the grinding tool, the vacuum suction nozzle 61 can be pressed into the avoidance groove 62 and will not be clamped between the vacuum suction cup 6 and the grinding tool to affect the sticking of the new sandpaper.

[0043] In this embodiment, a feed port 44 is provided on the top of the material barrel 4. When the material barrel 4 is out of sandpaper, sandpaper can be replenished through the feed port 44. The first bin body 41 is covered with a pressure cover 45 from the feed port 44. The pressure cover 45 can move up and down in the first bin body 41 under the action of its own gravity. By setting the pressure cover 45, not only can the first bin body 41 be sealed to protect the sandpaper inside, but also, when the vacuum suction cup 6 absorbs and removes the sandpaper, the sandpaper in the material barrel 4 moves down neatly under the pressure of the pressure cover 45 to avoid paper jams.

[0044] In this embodiment, the rocker arm 2 includes a main arm 21, a first transmission member 22, a motor 23, and a second transmission member 24 connected to the first transmission member 22. The main arm 21 is rotatably connected to the first inner wall 1. The first transmission member 22 is provided on the main arm 21, and one end of the first transmission member 22 is connected to the output end of the motor 23, and is used to drive the second transmission member 24 to move under the drive of the motor 23. The suction cup and the clamp 7 are connected to the second transmission member 24. Preferably, the first transmission member 22 is a screw rod, and the second transmission member 24 is a threaded sleeve. The screw rod drives the threaded sleeve to move under the action of the first motor 23, thereby driving the suction cup and the clamp 7.

[0045] In this embodiment, the suction cup includes a base 63, a buffer structure 64 and a disk surface 65, the base 63 and the disk surface 65 are connected by the buffer structure 64, and the disk surface 65 is provided with an adsorption hole, and the adsorption hole is connected to the above-mentioned vacuum suction nozzle 61. Since the rocker arm 2 is a cantilever beam structure, the buffer structure 64 is provided on the vacuum suction cup 6, which can reduce the impact of the grinding tool on the rocker arm 2 and improve the service life of the rocker arm 2; when the grinding tool presses down the vacuum suction cup 6 to fix the new sandpaper to the grinding tool, the buffer structure 64 undergoes elastic deformation, on the contrary, the elastic force of the buffer structure 64 can better stick the new sandpaper to the grinding tool, and improve the fixing effect of the sandpaper; in addition, when the surface of the grinding tool and the vacuum suction cup 6 are not flush, the buffer structure 64 can deform adaptively so that the surfaces of the two can be flat, at this time the force on the sandpaper is uniform, the grinding effect is good, and the problem that the surface parts of the two cannot be flattened, resulting in the sandpaper at this position cannot be pressed, close, and the fixing effect is poor.

[0046] In this embodiment, guide rails 25 and sliders 26 are provided between the main arm 21 and the vacuum suction cup 6 and the clamp 7, so that the movement of the vacuum suction cup 6 and the clamp 7 is smoother.

[0047] Preferably, there are multiple buffer structures 64, and the multiple buffer structures 64 are evenly distributed. Each buffer structure 64 includes a support column 641, an elastic member and a connecting column 642. The support column 641 and the connecting column 642 are connected by an elastic member. The elastic member can be a spring. In this embodiment, it is connected inside the column, which is not shown in the figure. One of the support column 641 and the connecting column 642 is connected to the base 63, and the other is connected to the disk surface 65. The two connection positions can be set as needed.

[0048] Among them, the support column 641 and / or the connecting column 642 are telescopic rods. The specific column body that is the telescopic rod can be set according to needs. The support column 641 and the connecting column 642 are set as telescopic rods, and the disk surface 65 of the vacuum suction cup 6 has the function of moving up and down, which makes it easier to replace sandpaper.

[0049] In this embodiment, the first inner side wall 1 is provided with a sandpaper window 8, through which sandpaper can be replenished to the feed port 44 of the material barrel 4. The storage box 5 is provided with a pull-out structure, and when a certain amount of old sandpaper is stored, the storage box 5 is pulled out and recycled.

[0050] In this embodiment, there are multiple material barrels 4, and the specific number can be set according to needs. By setting multiple material barrels 4, sandpapers of different specifications can be stored in the machine tool.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic sandpaper changing device for a machine tool, the machine tool comprising a first inner side wall, characterized in that: It includes a rocker arm rotatably connected to the first inner side wall, a driving device fixed to the first inner side wall, a material barrel and a storage box; The rocker arm is provided with a vacuum suction cup and a clamp, and the vacuum suction cup is located at the top of the rocker arm; The material barrel is located above the rocker arm, and is provided with a first storage body for storing new sandpaper and a material outlet; The storage box is located below the rocker arm; The output end of the driving device is connected to the rocker arm, and is used to drive the rocker arm to rotate to abut against the first inner wall, and can drive the vacuum suction cup to rotate to a position opposite to the discharge port and the sticking surface of the sticking disc of the grinding tool, and can drive the clamp to the side of the sticking surface of the sticking disc; The discharge port is located at the bottom of the barrel, and a limiting structure is provided at the discharge port to prevent sandpaper from falling.

2. The automatic sandpaper changing device for machine tools according to claim 1, characterized in that: The shape of the vacuum suction cup is adapted to the adhesive disc, and a plurality of vacuum suction nozzles are arranged on the vacuum suction cup.

3. The automatic sandpaper changing device for a machine tool according to claim 2, characterized in that: An avoidance groove is provided at a position where the vacuum suction cup is opposite to the vacuum suction nozzle.

4. The automatic sandpaper changing device for machine tools according to claim 1, characterized in that: A feed port is arranged on the top of the material barrel, and a pressure cover which can slide along the first warehouse body is covered from the feed port by the first warehouse body.

5. The automatic sandpaper changing device for machine tools according to claim 1, characterized in that: The rocker arm includes a main arm, a first transmission member, a motor, and a second transmission member connected to the first transmission member. The main arm is rotatably connected to the first inner wall. The first transmission member is arranged on the main arm, and one end of the first transmission member is connected to the output end of the motor for driving the second transmission member to move under the drive of the motor. The suction cup and the clamp are connected to the second transmission member.

6. The automatic sandpaper changing device for a machine tool according to claim 5, characterized in that: The suction cup comprises a base, a buffer structure and a disk surface, wherein the base and the disk surface are connected via the buffer structure, and adsorption holes are arranged on the disk surface.

7. The automatic sandpaper changing device for a machine tool according to claim 6, characterized in that: The buffer structure comprises a support column, an elastic member and a connecting column, wherein the support column and the connecting column are connected by the elastic member; One of the supporting column and the connecting column is connected to the base, and the other is connected to the disk surface; There are multiple buffer structures, and the multiple buffer structures are evenly distributed.

8. The automatic sandpaper changing device for a machine tool according to claim 7, characterized in that: The supporting columns and / or connecting columns are telescopic rods.

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