Grinding device and grinding system for polishing curved-surface parts

Abstract

The utility model relates to a polishing device and a polishing system used for polishing curved surface parts, the polishing device comprises a polishing mechanism, the polishing mechanism comprises a support, a transmission wheel assembly, an annular polishing belt and a rotary driving device, the transmission wheel assembly comprises a plurality of transmission wheels, and the transmission wheels are rotatably installed on the support; the annular grinding belt is tensioned on the transmission wheels and is in mutual friction transmission, the peripheral face of the annular grinding belt is an outwards-protruding arc-shaped face, a grinding material layer is arranged on the outwards-protruding arc-shaped face, and the rotary driving equipment is installed on the support and drives at least one transmission wheel to rotate. According to the curved surface polishing device, the outer peripheral face of the annular polishing belt is arranged to be the outwards-protruding arc-shaped face, and the outwards-protruding arc-shaped face can be used for polishing curved surface parts more efficiently and fully.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding, in particular to a grinding device and a grinding system for polishing curved surface parts. Background Art

[0002] In the structure of related mechanical equipment, there are often a large number of curved parts, such as the blades of worm gear engines. During the manufacturing process of these parts, the curved surface needs to be ground or polished. For the surface treatment of the above-mentioned "curved parts", if a conventional disc grinding device or a flat belt grinding device is used for grinding or polishing, it is often difficult to grind the curved surface of the parts to an ideal state and fully guarantee their working efficiency. How to achieve efficient and sufficient grinding of curved parts is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to provide a grinding device and a grinding system for polishing curved surface parts, which can achieve efficient and sufficient grinding of curved surface parts.

[0004] In order to solve the above technical problems, the utility model provides a grinding device for polishing curved parts, including a grinding mechanism, wherein the grinding mechanism includes a bracket and a grinding belt assembly, and the grinding belt assembly is installed on the bracket. It is characterized in that the grinding belt assembly includes an annular grinding belt for contacting the workpiece to be polished, a plurality of transmission wheels for tensioning and frictionally transmitting the annular grinding belt, and a rotating drive device for driving at least one of the transmission wheels to rotate, the outer peripheral surface of the annular grinding belt is an outward convex arc surface, and an abrasive layer is provided on the outward convex arc surface.

[0005] Furthermore, a transmission groove is provided on the inner circumference of the annular grinding belt, and the edge of the transmission wheel is embedded in the transmission groove of the annular grinding belt.

[0006] Furthermore, the cross section of the annular grinding belt is in the shape of a groove circle, the arc surface of the annular grinding belt is the convex arc surface, and the groove of the annular grinding belt is the transmission groove.

[0007] Furthermore, the bracket is an elongated bracket, and the grinding belt assembly includes two transmission wheels, which are respectively close to two ends of the elongated bracket along the length direction and tension the annular grinding belt into an annular runway shape.

[0008] Furthermore, the bracket has a fixed end for external connection, and the rotation drive device is close to the fixed end of the bracket.

[0009] Furthermore, the bracket includes a support portion and an adjusting portion, the adjusting portion is adjustably connected to the support portion, at least one of the transmission wheels and the rotary drive device are installed on the support portion, and at least one of the transmission wheels is installed on the adjusting portion.

[0010] Furthermore, one of the support portion and the adjustment portion is provided with a guide groove, and the other is provided with a guide ridge, and the guide groove and the guide ridge cooperate with each other so that the adjustment portion can be translationally connected to the support portion.

[0011] Furthermore, a slot hole is provided on the adjusting portion, the slot length direction of the slot hole is consistent with the translation direction of the adjusting portion, the slot wall of the slot hole is provided with a rack structure, and the grinding mechanism also includes an adjusting component, the adjusting component is installed on the support portion, the adjusting component includes a gear shaft, a worm wheel, a worm and a rotating handle, the gear shaft is rotatably connected to the support portion and meshes with the rack structure, the worm wheel is transmission connected to the gear shaft and the two rotate synchronously, the worm is rotatably connected to the support portion and meshes with the worm wheel, and the rotating handle is transmission connected to the worm and the two rotate synchronously.

[0012] Furthermore, the grinding device also includes a floating mechanism, which is connected to the bracket. The floating mechanism senses the contact force between the annular grinding belt and the workpiece to be grinded and drives the bracket to move to control the contact force between the annular grinding belt and the workpiece to be grinded within a set range.

[0013] The utility model also provides a grinding system for polishing curved surface parts, including a positioning device, the grinding device and a mechanical arm, wherein the positioning device is used to position the workpiece to be polished, the grinding device grinds the workpiece, and the mechanical arm is used to drive the grinding device to move relative to the workpiece to be polished.

[0014] The above technical solution of the utility model has the following advantages compared with the prior art:

[0015] 1) The grinding device and grinding system for polishing curved surface parts described in the utility model, by setting the outer peripheral surface of the annular grinding belt as an outward convex arc surface, the outward convex arc surface is more easily fitted with the curved surface (especially the concave curved surface) of the curved surface part, and the curved surface of the curved surface part can be polished more efficiently and fully;

[0016] 2) The grinding device and grinding system for polishing curved surface parts described in the utility model, by providing a transmission groove for embedding the transmission wheel on the inner circumference of the annular grinding belt, on the one hand, ensures that the contact area between the transmission wheel and the annular grinding belt is as large as possible, thereby ensuring the transmission effect between the two; on the other hand, since the transmission wheel is embedded in the transmission groove, the area of ​​the convex arc surface can be designed to be as large as possible, which is more suitable for grinding curved surface parts;

[0017] 3) The grinding device and grinding system for polishing curved surface parts described in the utility model, by setting the cross section of the annular grinding belt to a groove circular shape, the area of ​​the convex arc surface is large, the arc angle is large, which is conducive to grinding curved surface parts;

[0018] 4) The grinding device and grinding system for polishing curved surface parts described in the utility model, by setting the bracket as a long bracket and tensioning the annular grinding belt into an annular runway shape, makes the entire grinding device slender, which is convenient for grinding the narrow position of the curved surface parts;

[0019] 5) The grinding device and grinding system for polishing curved surface parts described in the present invention set the rotary drive device close to the fixed end of the bracket. On the one hand, the rotary drive device is generally heavy, and setting it close to the fixed end of the bracket can prevent the grinding device from vibrating during the grinding process. On the other hand, it can be kept away from the curved surface parts to prevent interference between the rotary drive device and the curved surface parts during grinding.

[0020] 6) The grinding device and grinding system for polishing curved parts described in the utility model configure the bracket to be a separate support portion and an adjustment portion, which can adjust the positional relationship between different transmission wheels. On the one hand, the tension of the annular grinding belt can be adjusted, and on the other hand, the annular grinding belt can be easily replaced;

[0021] 7) The grinding device and grinding system for polishing curved surface parts described in the utility model ensure that the support part and the adjustment part are more accurate when adjusting their positions by providing guide grooves and guide convex strips;

[0022] 8) The grinding device and grinding system for polishing curved parts described in the utility model, by providing an adjustment component, can adjust the position relationship of the transmission wheel by simply operating the rotating handle, which is easy to operate;

[0023] 9) The grinding device and grinding system for polishing curved surface parts described in the present invention can ensure that the contact force between the annular grinding belt and the curved surface parts remains constant by providing a floating mechanism, thereby ensuring the consistency of the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the grinding device disclosed in the utility model;

[0026] Figure 2 It is an exploded view of the grinding mechanism disclosed in the utility model;

[0027] Figure 3 It is an internal schematic diagram of the grinding mechanism disclosed in the utility model;

[0028] Figure 4 It is a schematic diagram of the annular grinding belt disclosed in the utility model;

[0029] Figure 5 It is a schematic diagram of the cooperation between the annular grinding belt and the transmission wheel disclosed in the utility model;

[0030] Figure 6 A schematic diagram of the bracket disclosed in the utility model;

[0031] Figure 7 It is a schematic diagram of the adjustment part disclosed in the utility model;

[0032] Figure 8 It is an exploded schematic diagram of the regulating assembly disclosed in the utility model;

[0033] Fig. 9 It is a schematic diagram of the grinding system disclosed in the utility model;

[0034] Fig.10 It is a schematic diagram of the convex curved surface of the polished curved surface part disclosed in the utility model;

[0035] Fig.11 It is a schematic diagram of the circular arc chamfer of the convex curved surface of the polished curved surface part disclosed in the utility model;

[0036] Fig.12 It is a schematic diagram of the concave curved surface of the polished curved surface part disclosed in the utility model;

[0037] Fig.13 It is a schematic diagram of the circular arc chamfer of the concave curved surface of the polished curved surface part disclosed in the utility model.

[0038] Description of the accompanying drawings:

[0039] Ⅰ. Grinding mechanism; Ⅱ. Floating mechanism;

[0040] 1. bracket; 11. support portion; 111. guide groove; 12. adjustment portion; 121. guide convex strip;

[0041] 122, slot; 123, rack structure; 21, annular grinding belt; 211, abrasive layer; 212, transmission groove; 22, transmission wheel; 23, rotary drive device; 31, gear shaft; 32, worm wheel; 33, worm;

[0042] 34. Rotating handle; 41. Butterfly nut; 42. Protective cover;

[0043] A. Workpiece to be polished; B. Positioning device; C. Polishing device; D. Robotic arm. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] like Figures 1 to 8 As shown, an embodiment of the grinding device for polishing curved surface parts in the utility model.

[0046] The above-mentioned grinding device includes a grinding mechanism I, which includes a bracket 1 and a grinding belt assembly. The above-mentioned grinding belt assembly is installed on the above-mentioned bracket 1. The above-mentioned grinding belt assembly includes an annular grinding belt 21 for contacting the workpiece to be ground, a plurality of transmission wheels 22 for tensioning and frictionally transmitting the above-mentioned annular grinding belt 21, and a rotating driving device 23 for driving at least one of the above-mentioned transmission wheels 22 to rotate. The outer peripheral surface of the above-mentioned annular grinding belt 21 is an outward convex arc surface, and an abrasive layer 211 is provided on the above-mentioned convex arc surface.

[0047] The above-mentioned rotation driving device 23 is installed on the above-mentioned bracket 1, and the above-mentioned rotation driving device 23 can specifically be a motor. One of the above-mentioned transmission wheels 22 is transmission-connected to the rotating shaft of the rotation driving device 23, and the other above-mentioned transmission wheels 22 are rotatably connected to the above-mentioned bracket 1 through bearings, and the rotation axes of the different above-mentioned transmission wheels 22 are parallel. The inner circumference of the annular grinding belt 21 contacts the transmission wheel 22, and the outer circumference of the annular grinding belt 21 is used to contact the workpiece to be polished. By setting the outer circumference of the annular grinding belt as an outward convex arc surface, the outward convex arc surface is more easily fitted with the curved surface of the curved surface part (especially the concave curved surface), and the curved surface of the curved surface part can be polished more efficiently and fully.

[0048] In this embodiment, a transmission groove 212 is provided on the inner circumference of the annular grinding belt 21 , and the edge of the transmission wheel 22 is embedded in the transmission groove 212 of the annular grinding belt 21 .

[0049] The shape of the transmission groove 212 matches the shape of the edge of the transmission wheel 22, that is, the contact area between the transmission groove 212 and the transmission wheel 22 should be as large as possible, so as to achieve friction transmission. By providing the transmission groove 212 for embedding the transmission wheel 22 on the inner circumference of the annular grinding belt 21, on the one hand, the contact area between the transmission wheel 22 and the annular grinding belt 21 is ensured to be as large as possible, thereby ensuring the transmission effect therebetween; on the other hand, since the transmission wheel 22 is embedded in the transmission groove 212, the area of ​​the convex arc surface can be designed to be as large as possible, which is more suitable for grinding curved surface parts.

[0050] In this embodiment, the cross section of the annular grinding belt 21 is a grooved circular shape, the arc surface of the annular grinding belt 21 is the convex arc surface, and the groove of the annular grinding belt 21 is the transmission groove 212 .

[0051] The circular groove shape is a shape formed by partially concave edges of a circle. The concave surface of the annular grinding belt 21 is a transmission surface that cooperates with the transmission wheel 22, and the convex surfaces of the annular grinding belt 21 are all grinding working surfaces that contact the workpiece to be polished, making full use of various positions of the annular grinding belt 21. By setting the cross section of the annular grinding belt 21 to a circular groove shape, the convex arc surface has a large area and a large arc angle, which is conducive to polishing curved parts.

[0052] In this embodiment, the bracket 1 is an elongated bracket, and the transmission wheel assembly includes two transmission wheels 22. The two transmission wheels 22 are respectively close to two ends of the elongated bracket along the length direction and tighten the annular grinding belt 21 into an annular track shape.

[0053] After being tensioned, the annular grinding belt 21 includes a straight belt portion and an arcuate belt portion, and the length direction of the straight belt portion of the annular grinding belt is consistent with the length direction of the elongated bracket. By setting the bracket as an elongated bracket, the annular grinding belt is tensioned into an annular track shape, so that the entire grinding device is slender, which is convenient for grinding narrow positions of curved parts.

[0054] In this embodiment, the bracket 1 has a fixed end for external connection, and the rotation driving device 23 is close to the fixed end of the bracket 1 .

[0055] The fixed end of the bracket 1 is used, for example, to connect with other drive devices or other brackets. The rotary drive device 23 is arranged near the fixed end of the bracket 1. On the one hand, the rotary drive device 23 is generally heavy, and it is arranged near the fixed end of the bracket 1 to prevent the grinding device from vibrating during the grinding process. On the other hand, the rotary drive device 23 can be kept away from the workpiece to be ground, preventing interference between the rotary drive device 23 and the workpiece to be ground during grinding.

[0056] In this embodiment, the above-mentioned bracket 1 includes a support part 11 and an adjusting part 12, the above-mentioned adjusting part 12 is adjustably connected to the above-mentioned support part 11, at least one of the above-mentioned transmission wheel 22 and the above-mentioned rotation driving device 23 are installed on the above-mentioned support part 11, and at least one of the above-mentioned transmission wheel 22 is installed on the above-mentioned adjusting part 12.

[0057] The bracket 1 is configured as the above-mentioned support part 11 and the above-mentioned adjustment part 12, and the transmission wheels 22 are distributed on the support part 11 and the adjustment part 12. Since the positional relationship between the support part 11 and the adjustment part 12 can be adjusted, the distance between different transmission wheels 22 can be adjusted. The positional relationship between different transmission wheels 22 can be adjusted. On the one hand, the tension of the endless grinding belt 21 can be adjusted, and on the other hand, the endless grinding belt 21 can be easily replaced.

[0058] In this embodiment, one of the support portion 11 and the adjustment portion 12 is provided with a guide groove 111, and the other is provided with a guide ridge 121. The guide groove and the guide ridge cooperate with each other so that the adjustment portion 12 can be translationally connected to the support portion 11.

[0059] Specifically, the guide groove 111 is provided on the support portion 11, and the guide ridge 121 is provided on the adjustment portion 12. The guide groove 111 and the guide ridge 121 are matched with each other and can slide relative to each other along a set track, thereby realizing the guidance of the relative movement of the support portion 11 and the adjustment portion 12. The guide groove 111 and the guide ridge 121 are commonly used guide components, and the structure is not described here. By providing the guide groove and the guide ridge, it is ensured that the support portion and the adjustment portion are more accurate when adjusting the position.

[0060] In this embodiment, the adjusting portion 12 is provided with a slot 122, and a slot wall of the slot 122 is provided with a rack structure 123;

[0061] The above-mentioned grinding mechanism I also includes an adjusting component, which is installed on the above-mentioned support part 11. The above-mentioned adjusting component includes a gear shaft 31, a worm wheel 32, a worm 33 and a rotating handle 34. The above-mentioned gear shaft 31 is rotatably connected to the above-mentioned support part 11 and meshes with the above-mentioned rack structure 123. The above-mentioned worm wheel 32 is transmission-connected to the above-mentioned gear shaft 31 and the two rotate synchronously. The above-mentioned worm 33 is rotatably installed on the above-mentioned support part 11 and meshes with the above-mentioned worm wheel 32. The above-mentioned rotating handle 34 is transmission-connected to the above-mentioned worm 33 and the two rotate synchronously.

[0062] The slot hole 122 is a hole with an oblong cross section. The hole wall of the slot hole 122 includes two opposite straight hole walls and two opposite concave arc-shaped hole walls. The hole wall of the slot hole 122 is the above-mentioned straight hole wall. The gear shaft 31 and the worm 33 are each connected to the support portion 11 through a bearing. By rotating the rotating handle 34, the worm 33 rotates, thereby driving the worm wheel 32 to rotate, thereby driving the gear shaft 31 to rotate, thereby driving the rack structure 123 to translate, and thereby adjusting the adjustment portion 12 to translate relative to the support portion 11. By setting the adjustment component, the position relationship of the transmission wheel can be adjusted by only operating the rotating handle, which is easy to operate.

[0063] In this embodiment, the grinding device further includes a floating mechanism II, which is connected to the bracket 1. The floating mechanism II senses the contact force between the annular grinding belt 21 and the workpiece to be grinded and drives the bracket 1 to move to control the contact force between the annular grinding belt 21 and the workpiece to be grinded within a set range.

[0064] The above-mentioned floating mechanism II generally includes a force sensor and a telescopic drive device. The force sensor detects the actual contact force of the workpiece to be polished in real time. When the actual contact force is greater than the set value, the telescopic drive device drives the polishing mechanism to move away from the workpiece to be polished until the actual contact force is equal to the set value. When the actual contact force is less than the set value, the telescopic drive device drives the polishing mechanism to move toward the workpiece to be polished until the actual contact force is equal to the set value. The above-mentioned force sensor can be arranged between the above-mentioned telescopic drive device and the above-mentioned polishing mechanism. By setting the floating mechanism II, the contact force between the annular polishing belt and the curved surface part can be kept constant, thereby ensuring the consistency of the polishing effect.

[0065] See also Figures 9 to 13 As shown, an embodiment of the grinding system for polishing curved surface parts in the utility model.

[0066] The grinding system includes a positioning device B for positioning a workpiece A to be ground, the above-mentioned grinding device C for grinding the curved surface part A, and a mechanical arm D for driving the above-mentioned grinding device C to move relative to the curved surface part I.

[0067] Specifically in this embodiment, the positioning device B is a rotating fixture that can drive the curved surface part A to rotate. The positioning device and the mechanical arm cooperate with each other, so that the grinding device can perform all-round grinding on each position of the curved surface part that needs to be polished.

[0068] The working process of the above grinding system is described below:

[0069] 1. Selection of grinding device:

[0070] Select the "grinding device" according to the needs of fast grinding of "curved surface" or "arc surface" of curved parts;

[0071] 2. Specific operation of grinding device

[0072] 1) Step 1: Install the "grinding device" to the end of the "robot (mechanical arm)" located at the "grinding station"; Step 2: Clamp the "curved part" to be polished to the "rotating fixture (positioning device)";

[0073] 2) Turn on the power supply; turn on the control signal; set the relevant driver programs required for polishing;

[0074] 3) Start the "robotic arm"; start the "grinding device"; start the "rotating fixture" and start grinding the target curved surface (or arc surface) of the "curved part" (the dynamics of the "robotic arm", "grinding device" and "rotating fixture" are coordinated with each other); when grinding the convex curved surface and the arc chamfer of the curved part, use the straight belt section of the annular grinding belt for grinding; when grinding the concave curved surface and the arc chamfer of the curved part, use the arc belt section of the annular grinding belt for grinding.

[0075] 4) Sanding belt replacement:

[0076] Step 1: Turn off the "grinding device";

[0077] Step 2: Remove the "sand belt guard 42" from the "grinding device" by rotating the "butterfly nut 41";

[0078] Step 3: Rotate the "rotating handle" counterclockwise to retract the "adjusting part" toward the "floating mechanism";

[0079] Step 4: Remove the old "sand belt (ring-shaped sanding belt)" from the "drive wheel";

[0080] Step 5: Install the new "sand belt" onto the "drive wheel" and turn the "rotating handle" clockwise to make the "sand belt" in a tensioned (tightened) state;

[0081] Step 6: Reset the "butterfly nut" and "sand belt guard" (install them on the "grinding device");

[0082] Step 7: Start all relevant equipment and continue grinding operations.

[0083] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. 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 implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A grinding device for polishing curved parts, comprising a grinding mechanism, wherein the grinding mechanism comprises a bracket and a grinding belt assembly, wherein the grinding belt assembly is mounted on the bracket, and wherein: The grinding belt assembly includes an annular grinding belt for contacting a workpiece to be ground, a plurality of transmission wheels for tensioning and frictionally transmitting the annular grinding belt, and a rotary driving device for driving at least one of the transmission wheels to rotate. The outer peripheral surface of the annular grinding belt is an outwardly convex arc surface, and an abrasive layer is provided on the outwardly convex arc surface.

2. The grinding device according to claim 1, characterized in that: The inner circumference of the annular grinding belt is provided with a transmission groove, and the edge of the transmission wheel is embedded in the transmission groove of the annular grinding belt.

3. The grinding device according to claim 2, characterized in that: The cross section of the annular grinding belt is in the shape of a circular groove, the arc surface of the annular grinding belt is the convex arc surface, and the groove of the annular grinding belt is the transmission groove.

4. The grinding device according to claim 1, characterized in that: The bracket is an elongated bracket, and the grinding belt assembly includes two transmission wheels, which are respectively close to two ends of the elongated bracket along the length direction and tension the annular grinding belt into an annular track shape.

5. The grinding device according to claim 1, characterized in that: The bracket has a fixed end for external connection, and the rotation driving device is close to the fixed end of the bracket.

6. The grinding device according to claim 1, characterized in that: The bracket includes a support portion and an adjusting portion, wherein the adjusting portion is adjustably connected to the support portion, at least one of the transmission wheels and the rotary drive device are mounted on the support portion, and at least one of the transmission wheels is mounted on the adjusting portion.

7. The grinding device according to claim 6, characterized in that: On the support part and the adjusting part, one of them is provided with a guide groove, and the other is provided with a guide convex strip, and the guide groove and the guide convex strip cooperate with each other so that the adjusting part can be connected to the support part in a translational manner.

8. The grinding device according to claim 7, characterized in that: The adjusting portion is provided with a slot hole, the slot length direction of the slot hole is consistent with the translation direction of the adjusting portion, the slot wall of the slot hole is provided with a rack structure, the grinding mechanism also includes an adjusting component, the adjusting component is installed on the support portion, the adjusting component includes a gear shaft, a worm wheel, a worm and a rotating handle, the gear shaft is rotatably connected to the support portion and meshes with the rack structure, the worm wheel is transmission connected to the gear shaft and the two rotate synchronously, the worm is rotatably connected to the support portion and meshes with the worm wheel, the rotating handle is transmission connected to the worm and the two rotate synchronously.

9. The grinding device according to claim 1, characterized in that: The grinding device further comprises a floating mechanism, which is connected to the bracket, and senses the contact force between the annular grinding belt and the workpiece to be grinded and drives the bracket to move to control the contact force between the annular grinding belt and the workpiece to be grinded within a set range.

10. A grinding system for polishing curved parts, comprising a positioning device, a grinding device as claimed in any one of claims 1 to 9, and a robotic arm, wherein the positioning device is used to position a workpiece to be polished, the grinding device is used to polish the workpiece, and the robotic arm is used to drive the grinding device to move relative to the workpiece to be polished.

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