Automatic grinding device

Abstract

The utility model belongs to the technical field of polishing devices, and particularly discloses an automatic polishing device which comprises a device body, a mounting frame is fixedly connected in the device body, two groups of rotating shafts are rotatably mounted on the mounting frame, belt pulleys are sleeved on the two rotating shafts, abrasive belts are sleeved on the two belt pulleys, and an extrusion mechanism is further mounted on the mounting frame. A clamping mechanism is movably installed in the device body and driven to move towards the abrasive belt, a tensioning mechanism is installed on the installation frame, and the tensioning mechanism tensions the abrasive belt and enables the abrasive belt to protrude towards the extrusion mechanism. According to the automatic polishing device, the abrasive belt is tensioned through the tensioning mechanism and made to protrude towards the extrusion mechanism, the workpiece is extruded by the extrusion mechanism and can only make contact with the protruding part of the abrasive belt, the contact area of the workpiece and the abrasive belt is reduced, and therefore the situation that the workpiece is excessively polished is avoided; and metal powder generated by polishing is easier to separate from the abrasive belt.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to an automatic grinding device. Background Art

[0002] In the manufacturing process of orthopedic medical devices, a large number of long-axis tools are used. After mechanical processing, the handle of these long-axis tools is usually rough and needs to be polished to meet the surface roughness requirements. For the grinding of long-axis tools, manual grinding or grinding equipment is mostly used. When manual grinding is used, not only is the production efficiency low and the labor intensity high, but also because of manual holding and poor quality stability, inexperienced workers often grind poorly and the surface roughness cannot be achieved.

[0003] For example, the patent with authorization announcement number CN213673399U, with announcement date of 2021-07-13, discloses a belt grinder, including a base, a controller is installed on one side of the base, and two mounting brackets are symmetrically installed on the top of the base, the two mounting brackets are rotatably connected with connecting rods inside, and the two connecting rods are sleeved with transmission rollers, and a sanding belt is sleeved between the two transmission rollers, and one side of one of the mounting brackets is fixedly connected with a motor, and the end of the motor close to the mounting bracket is rotatably connected to one of the connecting rods, and two support brackets are symmetrically installed on one side of the top of the base close to the two mounting brackets. The utility model rotates the two rotating heads to drive the screws to move in the support plate, and drives the fixed plate to move by the screw, so that the fixed plate is against the workpiece, thereby allowing the device to fix the workpiece, so that the user does not need to hold the workpiece for grinding, which reduces the user's work difficulty and improves the user's work efficiency.

[0004] The disadvantage of existing grinding devices including the above-mentioned patent is that when grinding the workpiece with an elastic sanding belt, the workpiece needs to be pressed against the sanding belt so that the workpiece and the sanding belt are fully in contact and polished. This will cause the sanding belt to deform, increase the contact area with the workpiece, make it difficult to control the grinding amount, and even cause some areas of the workpiece to be over-grinded. Utility Model Content

[0005] The utility model aims to provide an automatic grinding device which can avoid over-grinding a workpiece.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An automatic grinding device comprises a device body, a mounting frame is fixedly connected inside the device body, two sets of rotating shafts are rotatably mounted on the mounting frame, both rotating shafts are equipped with belt pulleys, both belt pulleys are equipped with sanding belts, an extrusion mechanism is also mounted on the mounting frame, a clamping mechanism is movably mounted inside the device body, the clamping mechanism is driven to move toward the sanding belt, a tensioning mechanism is mounted on the mounting frame, the tensioning mechanism tensions the sanding belt and makes the sanding belt protrude toward the extrusion mechanism.

[0008] The above-mentioned grinding device, the extrusion mechanism includes a first electric push rod fixedly connected to the mounting frame, the first electric push rod is arranged perpendicular to the belt surface of the sanding belt, and the output end of the first electric push rod is directly opposite to the protruding position of the sanding belt, and the output end of the first electric push rod is fixedly connected to an extrusion block.

[0009] In the above-mentioned grinding device, two groups of parallel extrusion rollers are rotatably mounted on the extrusion block, the central axis of the extrusion rollers is arranged along the width direction of the sand belt, and the protruding position of the sand belt is directly opposite to the gap between the two extrusion rollers.

[0010] In the above-mentioned grinding device, the outside of the squeezing roller is sheathed with a rubber sleeve.

[0011] The above-mentioned grinding device, the tensioning mechanism includes a fixed block fixedly connected to the mounting frame, a first telescopic rod is fixedly mounted on the fixed block, the end of the first telescopic rod is fixedly connected to a connecting block, a supporting roller is rotatably mounted on the connecting block, the supporting roller is arranged parallel to the squeezing roller, a first spring is mounted on the telescopic rod, and both ends of the first spring respectively abut against the fixed block and the connecting block.

[0012] The grinding device mentioned above has a first tray and a second tray installed in the device body, and a mechanical arm installed in the device body, and a mechanical hand installed on the mechanical arm.

[0013] The above-mentioned grinding device, the clamping mechanism includes a sliding seat and a mounting seat, the sliding seat is slidably connected to the device body, the sliding direction of the sliding seat is parallel to the axial direction of the rotating shaft, the mounting seat is slidably installed on the sliding seat, the sliding directions of the mounting seat and the sliding seat are perpendicular to each other, and a three-jaw chuck is installed on the mounting seat, and the center axis of the three-jaw chuck is horizontally set.

[0014] In the above-mentioned grinding device, a second electric push rod is horizontally arranged in the device body, the second electric push rod is fixedly connected to the inner wall of the device body, and the output end of the second electric push rod is fixedly connected to the sliding seat.

[0015] In the above-mentioned grinding device, a second telescopic rod is fixedly connected to the sliding seat, a second spring is sleeved on the outside of the second telescopic rod, and two ends of the second spring respectively abut against the sliding seat and the mounting seat.

[0016] The above-mentioned grinding device has a turntable rotatably mounted on the mounting seat, a three-jaw chuck is fixedly connected to the turntable, the turntable and the three-jaw chuck are coaxially arranged, a drive motor is fixedly connected to the mounting seat, and the output end of the drive motor passes through the mounting seat and is fixedly connected to the turntable.

[0017] In the above technical scheme, the automatic grinding device provided by the utility model tightens the sanding belt through the tensioning mechanism and makes the sanding belt protrude toward the extrusion mechanism. The workpiece is squeezed by the extrusion mechanism and can only contact with the protruding part of the sanding belt, thereby reducing the contact area between the workpiece and the sanding belt, thereby avoiding excessive grinding of the workpiece. In addition, due to the protruding setting of the sanding belt, the metal powder generated by grinding is easier to separate from the sanding belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the front structure of the device body provided by an embodiment of the utility model;

[0020] Figure 2 A top view of the device body provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the positional relationship between the extrusion mechanism and the abrasive belt provided in an embodiment of the utility model;

[0022] Figure 4 The embodiment of the utility model provides Figure 2 The enlarged schematic diagram at A in the middle;

[0023] Figure 5 The embodiment of the utility model provides Figure 3 The enlarged schematic diagram of point B in the middle;

[0024] Figure 6 This is an enlarged schematic diagram of the installation status of the rotating shaft, belt pulley and abrasive belt provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Device body; 11. First tray; 12. Second tray; 13. Robot arm; 14. Robot hand; 2. Mounting frame; 21. Rotating shaft; 211. Belt pulley; 22. Sanding belt; 3. Extrusion mechanism; 31. First electric push rod; 32. Extrusion block; 321. Extrusion roller; 4. Clamping mechanism; 41. Sliding seat; 42. Mounting seat; 421. Turntable; 422. Driving motor; 43. Three-jaw chuck; 44. Second electric push rod; 5. Tensioning mechanism; 51. Fixed block; 52. First telescopic rod; 53. Connecting block; 54. Support roller; 55. First spring; 6. Second telescopic rod; 61. Second spring. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] like Figure 1-Figure 6 As shown, an automatic grinding device provided by an embodiment of the utility model includes a device body 1, a mounting frame 2 is fixedly connected in the device body 1, two groups of rotating shafts 21 are rotatably mounted on the mounting frame 2, both rotating shafts 21 are provided with belt pulleys 211, and both belt pulleys 211 are provided with sanding belts 22, a motor is fixedly connected to the mounting frame 2, and the output end of the motor is coaxially connected to a group of rotating shafts 21, and an extrusion mechanism 3 is also installed on the mounting frame 2, the extrusion mechanism 3 is used to squeeze the workpiece toward the sanding belt 22 so that the workpiece and the sanding belt 22 are tightly attached to each other and can be fully polished, a clamping mechanism 4 is movably installed in the device body 1, the clamping mechanism 4 is used to clamp and position the workpiece during grinding, and the clamping mechanism 4 is driven to move toward the sanding belt 22, and a tensioning mechanism 5 is installed on the mounting frame 2, the tensioning mechanism 5 tensions the sanding belt 22 and makes the sanding belt 22 protrude toward the extrusion mechanism 3.

[0030] The automatic grinding device provided by the embodiment of the utility model tensions the sanding belt 22 through the tensioning mechanism 5, and makes the sanding belt 22 protrude toward the extrusion mechanism 3. The workpiece is squeezed by the extrusion mechanism 3 and can only contact with the protruding part of the sanding belt 22, thereby reducing the contact area between the workpiece and the sanding belt 22, thereby avoiding excessive grinding of the workpiece. In addition, due to the protruding setting of the sanding belt 22, the metal powder generated by grinding is easier to separate from the sanding belt 22.

[0031] Furthermore, the extrusion mechanism 3 includes a first electric push rod 31 fixedly connected to the mounting frame 2, the first electric push rod 31 is arranged perpendicular to the belt surface of the sanding belt 22, and the output end of the first electric push rod 31 is directly opposite to the protruding position of the sanding belt 22, and the output end of the first electric push rod 31 is fixedly connected to an extrusion block 32. When the first electric push rod 31 is extended, the extrusion block 32 can be driven to squeeze the workpiece toward the protruding position of the sanding belt 22.

[0032] Furthermore, two groups of parallel squeeze rollers 321 are rotatably mounted on the squeeze block 32, and supports are fixedly connected to the positions corresponding to the two ends of the squeeze rollers 321 on the squeeze block 32. The two ends of the squeeze roller 321 are rotatably connected to the corresponding supports respectively, and the central axis of the squeeze roller 321 is arranged along the width direction of the sand belt 22. The protruding position of the sand belt 22 is opposite to the gap between the two squeeze rollers 321. When the workpiece is polished, the protruding position of the sand belt 22 and the two groups of squeeze rollers 321 form a triangular area. The workpiece is in the triangular area and is restricted. The triangular area can assist the clamping mechanism 4 to clamp the workpiece, and because the length of the triangular area is consistent with the length of the squeeze roller 321, it can also position the workpiece, which is helpful for sufficient polishing of various parts of the surface.

[0033] Preferably, the outside of the squeezing roller 321 is covered with a rubber sleeve.

[0034] Furthermore, the tensioning mechanism 5 includes a fixed block 51 fixedly connected to the mounting frame 2, a first telescopic rod 52 is fixedly mounted on the fixed block 51, a connecting block 53 is fixedly connected to the end of the first telescopic rod 52, a supporting roller 54 is rotatably mounted on the connecting block 53, another support is fixed at the position corresponding to the two ends of the supporting roller 54 on the connecting block 53, the two ends of the supporting roller 54 are respectively rotatably connected to the corresponding supports, the supporting roller 54 is arranged parallel to the extrusion roller 321, and a first spring 55 is mounted on the telescopic rod, the two ends of the first spring 55 respectively abut against the fixed block 51 and the connecting block 53, when in working state, the first spring 55 is in a contracted state, the first spring 55 pushes the connecting block 53, so that the supporting roller 54 tensions the sand belt 22 and makes the contact position between the sand belt 22 and the supporting roller 54 protrude toward the above-mentioned extrusion block 32.

[0035] Furthermore, a first pallet 11 and a second pallet 12 are installed in the device body 1, the unpolished workpiece is placed in the first pallet 11, and the polished workpiece is placed in the second pallet 12, and a robotic arm 13 is installed in the device body 1, and a robotic hand 14 is installed on the robotic arm 13. The robotic arm 13 drives the robotic hand 14 to place the workpiece on the first pallet 11 onto the clamping mechanism 4 for clamping, and the robotic arm 13 also drives the robotic hand 14 to place the polished workpiece on the clamping mechanism 4 onto the second pallet 12.

[0036] Furthermore, the clamping mechanism 4 includes a sliding seat 41 and a mounting seat 42. The sliding seat 41 is slidably connected to the device body 1. The sliding direction of the sliding seat 41 is parallel to the axial direction of the rotating shaft 21. Figure 1 The mounting seat 42 is slidably mounted on the sliding seat 41, and the sliding directions of the mounting seat 42 and the sliding seat 41 are perpendicular to each other. Figure 2 Sliding in the vertical direction in the view, a three-jaw chuck 43 is installed on the mounting seat 42. Optionally, the three-jaw chuck 43 is a pneumatic chuck. This is a prior art and can be directly applied without further elaboration. The center axis of the three-jaw chuck 43 is horizontally arranged. Preferably, the center axis of the three-jaw chuck 43 is within the above-mentioned triangular area.

[0037] Furthermore, a second electric push rod 44 is horizontally arranged in the device body 1, the second electric push rod 44 is fixedly connected to the inner wall of the device body 1, and the output end of the second electric push rod 44 is fixedly connected to the sliding seat 41. The second electric push rod 44 extends to drive the sliding seat 41 to slide toward the position of the mounting frame 2, so that the workpiece clamped by the three-jaw chuck 43 can be moved into the above-mentioned triangular area.

[0038] Furthermore, a second telescopic rod 6 is fixedly connected to the sliding seat 41 , a second spring 61 is sleeved on the outside of the second telescopic rod 6 , and two ends of the second spring 61 are respectively in contact with the sliding seat 41 and the mounting seat 42 .

[0039] Furthermore, a turntable 421 is rotatably mounted on the mounting seat 42, the three-jaw chuck 43 is fixedly connected to the turntable 421, the turntable 421 and the three-jaw chuck 43 are coaxially arranged, and a drive motor 422 is fixedly connected to the mounting seat 42, and the output end of the drive motor 422 passes through the mounting seat 42 and is fixedly connected to the turntable 421.

[0040] A controller is installed on one side of the device body 1, and the controller is used to control each driving member.

[0041] When the automated grinding device provided by the embodiment of the utility model is in use, the controller controls the robot arm 13 to drive the robot hand 14 to clamp the workpiece on the first tray 11 and put it into the three-jaw chuck 43. The three-jaw chuck 43 is driven to clamp the workpiece. At this time, the second electric push rod 44 extends and drives the sliding seat 41 to slide toward the position of the mounting frame 2 until the workpiece moves into the above-mentioned triangular area. During this process, the motor is started, and the motor drives its corresponding rotating shaft 21 to rotate, thereby causing the sanding belt 22 to rotate. When the workpiece moves into the above-mentioned triangular area, the first electric push rod 31 extends, pushing the extrusion block 32 to approach the sanding belt 22. At this time, the two extrusion rollers 321 are in contact with the workpiece. And push the workpiece to be close to the protruding position of the abrasive belt 22. During this process, the driving motor 422 drives the turntable 421 to rotate, and the turntable 421 drives the three-jaw chuck 43 to rotate, adjusting the surface of the workpiece in contact with the abrasive belt 22 so that all parts of the circumference of the workpiece are polished. After polishing is completed, the first electric push rod 31 shortens and drives the extrusion block 32 and the extrusion roller 321 to separate from the workpiece. Then, the second electric push rod 44 shortens and drives the sliding seat 41 to return to its original position. Finally, the robot arm 13 drives the robot hand 14 to remove the polished workpiece on the three-jaw chuck 43 and place it on the second tray 12. Repeat the above operations until the polishing of all workpieces is completed.

[0042] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic grinding device, comprising a device body, a mounting frame fixedly connected to the device body, two sets of rotating shafts rotatably mounted on the mounting frame, both rotating shafts are equipped with belt pulleys, and both belt pulleys are equipped with sanding belts, characterized in that: The mounting frame is also provided with an extrusion mechanism, a clamping mechanism is movably provided in the device body, the clamping mechanism is driven to move toward the abrasive belt, and a tensioning mechanism is provided on the mounting frame, the tensioning mechanism tensions the abrasive belt and makes the abrasive belt protrude toward the extrusion mechanism.

2. An automatic grinding device according to claim 1, characterized in that: The extrusion mechanism comprises a first electric push rod fixedly connected to the mounting frame, the first electric push rod is arranged perpendicular to the belt surface of the sanding belt, and the output end of the first electric push rod is directly opposite to the protruding position of the sanding belt, and the output end of the first electric push rod is fixedly connected with an extrusion block.

3. An automatic grinding device according to claim 2, characterized in that: Two groups of squeezing rollers arranged in parallel are rotatably mounted on the squeezing block, the central axis of the squeezing rollers is arranged along the width direction of the sand belt, and the protruding position of the sand belt is directly opposite to the gap between the two squeezing rollers.

4. The automatic grinding device according to claim 2, characterized in that: The outside of the squeezing roller is covered with a rubber sleeve.

5. The automatic grinding device according to claim 1, characterized in that: The tensioning mechanism includes a fixed block fixedly connected to the mounting frame, a first telescopic rod is fixedly mounted on the fixed block, an end of the first telescopic rod is fixedly connected to a connecting block, a supporting roller is rotatably mounted on the connecting block, the supporting roller is arranged parallel to the squeezing roller, a first spring is sleeved on the telescopic rod, and two ends of the first spring respectively abut against the fixed block and the connecting block.

6. The automatic grinding device according to claim 1, characterized in that: A first tray and a second tray are also installed in the device body, and a mechanical arm is installed in the device body, and a mechanical hand is installed on the mechanical arm.

7. The automatic grinding device according to claim 1, characterized in that: The clamping mechanism includes a sliding seat and a mounting seat. The sliding seat is slidably connected to the device body. The sliding direction of the sliding seat is parallel to the axial direction of the rotating shaft. The mounting seat is slidably mounted on the sliding seat. The sliding directions of the mounting seat and the sliding seat are perpendicular to each other. A three-jaw chuck is installed on the mounting seat, and the center axis of the three-jaw chuck is horizontally set.

8. The automatic grinding device according to claim 7, characterized in that: A second electric push rod is horizontally arranged in the device body, the second electric push rod is fixedly connected to the inner wall of the device body, and the output end of the second electric push rod is fixedly connected to the sliding seat.

9. The automatic grinding device according to claim 7, characterized in that: The sliding seat is fixedly connected with a second telescopic rod, the second telescopic rod is sleeved with a second spring outside, and two ends of the second spring respectively abut against the sliding seat and the mounting seat.

10. The automatic grinding device according to claim 7, characterized in that: A turntable is rotatably mounted on the mounting seat, a three-jaw chuck is fixedly connected to the turntable, the turntable and the three-jaw chuck are coaxially arranged, a driving motor is fixedly connected to the mounting seat, and an output end of the driving motor passes through the mounting seat and is fixedly connected to the turntable.

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