Grinding finish machining device of grinding and polishing equipment

Abstract

The utility model discloses a grinding finish machining device of grinding and polishing equipment, which comprises a gantry bracket, a first lifting mechanism and a second lifting mechanism which are connected to the gantry bracket, and a finish machining component which is controlled by the first lifting mechanism and the second lifting mechanism to synchronously lift, the first lifting mechanism and the second lifting mechanism are further provided with flange driving units used for driving the finish machining assembly to rotate. The finish machining assembly is used for conducting grinding finish machining on the workpiece. According to the grinding finish machining device of the grinding and polishing equipment, the two lifting mechanisms which are parallel to each other and are vertically distributed are arranged on the gantry support and used for driving the finish machining assembly to ascend and descend, meanwhile, the rotating flanges are further arranged on the lifting mechanisms and used for driving the finish machining assembly to rotate by an angle, and the grinding finish machining device runs stably; and workpieces in different shapes can be compatible, the universality is high, and the machining cost can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic grinding and polishing equipment technical field especially relates to a grinding and polishing equipment's grinding finish device. BACKGROUND

[0002] The existing manual grinding and polishing equipment mainly carries out polishing and polishing treatment to the surface of workpiece through the automatic rotation sand belt or grinding disc. The existing grinding and polishing equipment generally only carries out grinding and polishing equipment design for the workpiece of specific shape or structure, therefore the grinding and polishing equipment cannot be compatible with the workpiece of multiple different structures, causes the problem of poor equipment versatility and high cost. SUMMARY

[0003] The utility model discloses a grinding and polishing equipment's grinding finish device to overcome the insufficient of prior art, to solve the technical problem of poor versatility of the existing grinding and polishing equipment.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The embodiment of the utility model provides a grinding and polishing equipment's grinding finish device, it includes: gantry support, first elevating mechanism and second elevating mechanism that are connected on the gantry support and the finishing assembly that is controlled to the synchronous elevating of the first elevating mechanism and the second elevating mechanism, the first elevating mechanism and the second elevating mechanism still have the flange drive unit for driving the finishing assembly rotation, the finishing assembly is used to carry out grinding finish to workpiece.

[0006] Among them, the finishing assembly includes: connecting base, at least two directions setting's fine grinding unit that are connected on the connecting base, the fine grinding unit includes at least one fine grinding module, the connecting base is also connected to the first elevating mechanism and the second elevating mechanism.

[0007] Among them, the fine grinding module includes: fine grinding drive piece, the grinding wheel connecting module that is connected to the output end of fine grinding drive piece and the grinding and polishing wheel that is connected on the grinding wheel connecting module.

[0008] Among them, the connecting base is the square structure, and a plurality of installation grooves are arranged in the square structure, the fine grinding drive piece is arranged in the installation groove, and the grinding and polishing wheels are respectively protruded from four side surfaces of the square structure to form four grinding and polishing stations.

[0009] Among them, the gantry support includes: first stand, second stand and the cross arm that is connected to the top of the first stand and second stand at both ends, the first elevating mechanism is connected to the first stand, and the second elevating mechanism is connected to the second stand.

[0010] The first lifting mechanism comprises a first driving unit, a first screw rod controlled to rotate by the first driving unit, two first guide rail units arranged in parallel on both sides of the first screw rod, a first connecting piece connected to the first screw rod, and a driven flange unit connected to the first connecting piece.

[0011] The first guide rail unit comprises a longitudinal guide rail and at least two sliding blocks connected to the longitudinal guide rail, and the sliding blocks are further connected to the first connecting piece.

[0012] The first lifting mechanism further comprises an upper folding protective cover connected to an upper end edge of the first connecting piece, and a lower folding protective cover connected to a lower end edge of the first connecting piece.

[0013] The second lifting mechanism comprises a second driving unit, a second screw rod controlled to rotate by the second driving unit, second guide rail units arranged in parallel on both sides of the second screw rod, a second connecting piece connected to the second screw rod, and a driving flange unit connected to the second connecting piece.

[0014] The driving flange unit comprises a flange driving piece, a right-angle commutator, and a driving flange disc, an output shaft of the flange driving piece is connected to an input end of the right-angle commutator, and an output end of the right-angle commutator is connected to the driving flange disc.

[0015] The grinding and polishing equipment of the utility model discloses a grinding finishing device, which is characterized in that two lifting mechanisms that are parallel to each other and vertically distributed are arranged on a gantry support, are used for driving the lifting action of a finishing assembly, and are further provided with a rotating flange on the lifting mechanism, are used for driving the rotating angle of the finishing assembly, are stable in operation, can be compatible with workpieces of different shapes, are strong in universality, and can save machining cost.

[0016] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the gantry device and the finishing assembly of the grinding finishing device of the grinding and polishing equipment of the utility model embodiment.

[0018] Figure 2 This is a schematic diagram of the finishing component structure of the grinding and polishing equipment according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the finishing component of the grinding and polishing device in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the connecting base part of the grinding and polishing device of the present utility model embodiment.

[0021] Figure 5 This is a schematic diagram of the fine grinding unit structure of the grinding and polishing equipment according to an embodiment of the present invention.

[0022] Figure 6 and Figure 7 The diagram shows the overall structure of the gantry device of the grinding and polishing equipment according to an embodiment of this utility model from different perspectives.

[0023] Figure 8 and Figure 9 These are schematic diagrams of the first lifting mechanism of the gantry device of the grinding and polishing equipment according to an embodiment of the present invention, taken from different perspectives.

[0024] Figure 10 and Figure 11 These are schematic diagrams of the second lifting mechanism of the gantry device of the grinding and polishing equipment according to an embodiment of the present invention, taken from different perspectives.

[0025] Figure 12 and Figure 13 These are schematic diagrams from different perspectives of the internal structure of the second lifting mechanism of the gantry device of the grinding and polishing equipment according to an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-gantry device, 11-gantry support, 12-first lifting mechanism, 13-second lifting mechanism, 111-cross arm, 112-first upright column, 113-second upright column, 121-first driving unit, 122-first guide rail unit, 1221-first screw rod, 123-lower folding protective cover, 124-upper folding protective cover, 125-first connecting piece, 14-driven flange unit, 131-second guide rail unit, 132-second connecting piece, 133-lower folding protective cover, 134-upper folding protective cover, 135-second driving unit, 136-second screw rod, 137-upper shaft seat, 138-screw rod seat, 139-lower shaft seat, 141-flange connecting seat, 142-driven flange, 15-driven flange unit, 151-flange driving piece, 152-right angle commutator, 153-driven flange, 154-cable chain, 1311 / 1312-longitudinal guide rail, 1313 / 1314-sliding block, 600-finishing assembly, 61-connecting base, 610-mounting groove, 62(63, 64, 65)-refining unit, 621-refining driving piece, 622-grinding wheel connecting module, 624-grinding wheel connecting module, 626-grinding and polishing wheel, 623-lower connecting plate, 625-lower grinding wheel connecting module, 627-lower grinding and polishing wheel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will combine the drawings and specific embodiments to make further detailed description to the utility model.

[0029] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is the orientation or position relationship described based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or a specific order of precedence. Thus, a feature defined with "first", "second", etc. can include one or more of the features implicitly or explicitly.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be connected, or it can be detachable, or it can be integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The main shortcomings of the existing manual grinding and polishing equipment are as follows: the automation level is limited, most of the equipment relies on manual operation, the efficiency is low and the consistency is poor, the labor cost is high, the process relies on experience, the parameter optimization lacks scientific model support, and it is difficult to realize precise quality control. Among them, maintaining the stability between each functional unit of the grinding and polishing equipment is a key factor to improve the grinding and polishing quality. Therefore, based on the above needs, the present embodiment provides a grinding and finishing device of a grinding and polishing equipment.

[0036] Please refer to Figures 1 to 13 The embodiment discloses a grinding and polishing equipment grinding finishing device, which comprises a gantry device 100 and a finishing assembly 600 controlled by the gantry device 100, the gantry device 100 is used to drive the finishing assembly 600 to move up and down in the vertical direction, and the finishing assembly 600 is used to drive a grinding belt to polish and grind the surface of a workpiece.

[0037] Please refer to Figures 6 to 13 The gantry device 100 comprises a gantry support 11 and first and second lifting mechanisms 12 and 13 connected to the gantry support 11, the first and second lifting mechanisms 12 and 13 are arranged vertically and parallel to each other, and the first and second lifting mechanisms 12 and 13 each comprise a double-rail driving unit. The lifting mechanism of the grinding and polishing equipment grinding finishing device 100 of the embodiment adopts a double-rail driving unit, greatly improves the stability of the operation of the grinding and polishing tool and the accuracy of the lifting action, and is beneficial to the grinding and polishing quality and effect of the automatic grinding and polishing equipment.

[0038] As shown in Figure 7 The gantry support 11 comprises a first column 112, a second column 113 and a cross arm 111 connected to the top ends of the first and second columns 112 and 113 respectively, the first lifting mechanism 12 is connected to the first column 112, and the second lifting mechanism 13 is connected to the second column 113. The first and second columns 112 and 113 and the cross arm 111 jointly form a reversed U-shaped support frame mechanism, that is, a gantry structure.

[0039] Please refer to Figure 8 and Figure 9 The first lifting mechanism 12 comprises a first driving unit 121, a first screw rod 1221 controlled to rotate by the first driving unit 121, two first rail units 122 arranged parallel to the two sides of the first screw rod 1221, a first connecting piece 125 connected to the first screw rod 1221 and a driven flange unit 14 connected to the first connecting piece 125.

[0040] The first rail unit 122 comprises a longitudinal rail and at least two sliding blocks connected to the longitudinal rail, the sliding blocks are also connected to the first connecting piece 125, and the longitudinal rail is connected to the first column 112. The sliding blocks and the longitudinal rail are connected in a trapezoidal form.

[0041] The driven flange unit 14 comprises a flange connecting seat 141 connected to the first connecting member 125 and a flange plate 142 connected to the flange connecting seat 141. Specifically, the axial direction of the flange plate 142 is perpendicular to the lifting direction of the first lifting mechanism 12, and the disc surface of the flange plate 142 is horizontally arranged towards the side of the second lifting mechanism 13.

[0042] In the embodiment, the first driving unit 122 is a rotating driving module such as a servo motor.

[0043] Since the grinding finishing device 100 of the grinding and polishing equipment is applied to the lifting and rotating movement of the grinding and polishing tool, there are certainly particles such as grinding and polishing debris in the process of grinding and polishing the workpiece. In order to improve the smooth operation and service life of the first lifting mechanism 12 and the second lifting mechanism 13, the first lifting mechanism 12 further comprises an upper folding protective cover 124 connected to the upper end edge of the first connecting member 125 and a lower folding protective cover 123 connected to the lower end edge of the first connecting member 125. Specifically, the upper folding protective cover 124 and the lower folding protective cover 123 are both organ type protective covers. The driven flange unit 14 follows the first connecting member 125 and is controlled by the first driving unit 121 to perform lifting movement along the first guide rail unit 122, while the top end edge of the upper folding protective cover 124 is fixedly connected to the top of the first vertical column 112, and the lower end edge of the lower folding protective cover 123 is fixedly connected to the bottom of the first vertical column 112. During the synchronous lifting of the first connecting member 125 and the driven flange unit 14, the upper folding protective cover 124 and the lower folding protective cover 123 both follow the first connecting member 125 to perform vertical stretching and contraction movement, so that the internal structure of the first lifting mechanism 12 is always kept inside the variable sealing protective cover composed of the first connecting member 125, the upper folding protective cover 124 and the lower folding protective cover 123, thereby avoiding the entry of external grinding and polishing debris, damaging the track and affecting the smoothness and service life.

[0044] Please refer again to Figures 10 to 13 , the second lifting mechanism 13 comprises a second driving unit 135, a second screw rod 136 controlled to rotate by the second driving unit 135, a second guide rail unit 131 arranged in parallel on both sides of the second screw rod 136, a second connecting member 132 connected to the second screw rod 136, and a driving flange unit 15 connected to the second connecting member 132.

[0045] Among them, the upper end edge of the second connecting member 132 is further connected with an upper folding protective cover 134, and the lower end edge of the second connecting member 132 is further connected with a lower folding protective cover 133.

[0046] In the embodiment, the upper folding shield 134 and the lower folding shield 133 are both concertina shields. The upper folding shield 134 and the lower folding shield 133 have the same function as the first lifting mechanism 12.

[0047] The active flange unit 15 comprises a flange driving member 151, a right-angle commutator 152 and an active flange 153. The output shaft of the flange driving member 151 is connected to the input end of the right-angle commutator 152, and the output end of the right-angle commutator 152 is connected to the active flange 153. The flange driving member 151 is vertically arranged on the second vertical column 113, and the rotation direction of the active flange 153 is horizontal. Therefore, the right-angle commutator 152 is used for transmission commutation between the flange driving member 151 and the active flange 153, so as to realize power right-angle commutation of the flange driving member 151. The second connecting member 132 is also provided with a drag chain 154 for arranging wires electrically connected to the servo motor.

[0048] Please refer to Figure 12 and Figure 13 again. The second guide rail unit 131 comprises a longitudinal guide rail 1311 (1312) and at least two sliding blocks 1313 (1314) slidingly connected to the longitudinal guide rail 1311. The sliding blocks 1313 are also connected to the second connecting member 132, and the longitudinal guide rail 1311 is connected to the second vertical column 113.

[0049] The longitudinal guide rail 1311 and the longitudinal guide rail 1312 are fixedly connected to the second vertical column 113 and are parallelly distributed on both sides of the second lead screw 136. The second lead screw 136 is also provided with a lead screw seat 138, and the lead screw seat 138 is also connected to the second connecting member 132, so as to convert the rotation power of the second lead screw 136 into vertical lifting power. The second lead screw 136 is also provided with an upper shaft seat 137 near the upper end and a lower shaft seat 139 near the lower end, and the second lead screw 136 is rotatably inserted into the upper shaft seat 137 and the lower shaft seat 139. The second driving unit 135, the second guide rail unit 131, the second lead screw 136, the lead screw seat 138, the upper shaft seat 137 and the lower shaft seat 139 form a lead screw driving module.

[0050] In the embodiment, the second driving unit 135 and the flange driving member 151 are both servo motors.

[0051] Please refer to Figure 6The first lifting mechanism 12 and the second lifting mechanism 13 connected to the gantry support 11 are respectively used for driving the driven flange unit 14 and the driving flange unit 15 to perform synchronous lifting actions, and the driven flange unit 14 and the driving flange unit 15 are oppositely arranged, and a grinding and polishing tool, such as a rough grinding tool and a fine grinding tool, is arranged between the two. The two ends of the grinding and polishing tool are connected to the driven flange 142 and the driving flange 153 by screws. When it is necessary to adjust the angle of the grinding and polishing tool, the flange driving unit 151 is controlled to be started, and the driving flange 153 is rotated by a certain angle through the right-angle commutator 152, so that the angle adjustment of the grinding and polishing tool is realized.

[0052] The gantry device 100 of the embodiment is provided with two lifting mechanisms which are parallel and vertically distributed on the gantry support, the first lifting mechanism is internally provided with double tracks and at least two sliding blocks which are slidingly connected to the double tracks, so as to improve the lifting stability of the first lifting mechanism, and the second lifting mechanism is also provided with the mechanism of double tracks and at least two sliding blocks, so as to improve the lifting stability on the side. The first lifting mechanism and the second lifting mechanism jointly constitute a grinding and polishing tool lifting execution device, so as to further improve the stability of the overall lifting operation, thereby forming a multi-stage stable design to improve the stability, and the grinding and polishing tool is driven to perform lifting actions. Meanwhile, the lifting mechanism is also provided with a rotating flange to realize the rotating operation of the grinding and polishing tool in cooperation with the lifting mechanism. The gantry device has stable and reliable structure, and can realize the precise lifting and rotating actions of the grinding and polishing tool.

[0053] Please refer to Figures 1 to 5 The finishing assembly 600 comprises a connecting base 61, at least two directionally arranged fine grinding units 62 and 64 connected to the connecting base 61, the fine grinding unit 62(64) comprises at least one fine grinding module, and the connecting base 61 is further connected to the driven flange unit 14 of the first lifting mechanism 12 and the driving flange unit 15 of the second lifting mechanism 13.

[0054] In the embodiment, the fine grinding unit 62 and the fine grinding unit 63 constitute a fine grinding unit group in a first direction, and the fine grinding unit 64 and the fine grinding unit 65 constitute a fine grinding unit group in a second direction. The first direction is a vertical direction, and the second direction is a front-rear direction.

[0055] Specifically, taking the fine grinding unit 62 as an example, the fine grinding module comprises a fine grinding driving member 621, a grinding wheel connecting module 622 connected to the output end of the fine grinding driving member 621, and a grinding and polishing wheel 626 connected to the grinding wheel connecting module 624. In this embodiment, the fine grinding driving member 621 adopts a double-output shaft motor, one end of which is provided with the upper connecting plate 622, the grinding wheel connecting module 624 connected to the connecting plate 622, and the grinding and polishing wheel 626 connected to the grinding wheel connecting module 624. The lower end of the double-output shaft motor is symmetrically provided with a lower connecting plate 623, a lower grinding wheel connecting module 625 connected to the lower connecting plate 623, and a lower grinding and polishing wheel 627 connected to the lower grinding wheel connecting module 625.

[0056] In this embodiment, the connecting base 61 is a square structure, and a plurality of mounting grooves 610 are arranged in the square structure. The fine grinding driving member 621 is arranged in the mounting groove 610. The grinding and polishing wheel 626 (and the lower grinding and polishing wheel 627) respectively protrude from four side surfaces of the square structure to form four grinding and polishing stations.

[0057] Please refer to the combination Figure 3 In this embodiment, the fine grinding unit 62 and the fine grinding unit 63 are arranged in the vertical direction on the square structure of the connecting base 61. The grinding and polishing wheels 626 and the lower grinding and polishing wheels 627 at the top and bottom ends of the fine grinding unit 62 and the fine grinding unit 63 respectively protrude from the top surface and the bottom surface of the square structure. When the connecting base 61 is rotated under the driving of the driven flange unit 14 and the driving flange unit 15, different grinding and polishing angles and different positions of the fine grinding module can be adjusted. Similarly, the fine grinding unit 64 and the fine grinding unit 65 are grinding and polishing mechanisms arranged in the front-rear direction, which are arranged perpendicular to the vertically arranged fine grinding unit 62 (63). Finally, a four-sided multi-station structure is formed on the four side surfaces of the connecting base 61. It can be understood that the four fine grinding units 62 (63, 64, 65) can be provided with grinding and polishing wheels of the same mesh number to reduce the replacement cycle of the grinding and polishing wheels. Different mesh numbers of grinding and polishing wheels can also be provided to flexibly adjust different fine grinding modules to achieve different step grinding and polishing processes of the same workpiece.

[0058] The grinding and polishing device of the grinding and polishing equipment of this embodiment comprises two lifting mechanisms arranged in parallel and vertically on the gantry support, which are used to drive the grinding and polishing tool to lift. The lifting mechanism is also provided with a rotating flange, which is used to drive the rotation angle of the fine grinding assembly. The operation is stable, and it can be compatible with different shapes of workpieces, has strong universality, and can save processing cost.

[0059] The above only further illustrates the technical content of the utility model with examples, so that the reader can more easily understand, but does not represent that the embodiment of the utility model is limited to this, and any technical extension or re-creation made according to the utility model is protected by the utility model. The protection scope of the utility model is subject to the patent claim.

Claims

1. A grinding finishing device of a polishing apparatus, characterized by, The application relates to a gantry frame, a first lifting mechanism and a second lifting mechanism connected to the gantry frame, and a finishing assembly controlled by synchronous lifting of the first lifting mechanism and the second lifting mechanism, wherein the first lifting mechanism and the second lifting mechanism are provided with a flange driving unit for driving the finishing assembly to rotate; and the finishing assembly is used for grinding finishing of a workpiece. The finishing assembly comprises a connecting base, at least two directionally arranged fine grinding units connected to the connecting base, and at least one fine grinding module in the fine grinding units; and the connecting base is connected to the first lifting mechanism and the second lifting mechanism.

2. The grinding finishing device of the polishing and grinding apparatus according to claim 1, characterized by, The fine grinding module comprises a fine grinding driving piece, a grinding wheel connecting module connected to an output end of the fine grinding driving piece, and a grinding and polishing wheel connected to the grinding wheel connecting module.

3. The grinding finishing device of the polishing and grinding apparatus according to claim 2, characterized by, The connecting base is a square structure, a plurality of installation grooves are arranged in the square structure, the fine grinding driving piece is arranged in the installation grooves, and the grinding and polishing wheels are respectively protruded from four side surfaces of the square structure to form four grinding and polishing stations.

4. The grinding finishing device of the polishing apparatus according to claim 3, characterized by The gantry frame comprises a first stand, a second stand, and a cross arm connected to top ends of the first stand and the second stand; the first lifting mechanism is connected to the first stand, and the second lifting mechanism is connected to the second stand.

5. The grinding finishing device of the polishing apparatus according to any one of claims 1 to 4, characterized in that, The first lifting mechanism comprises a first driving unit, a first screw rod controlled by rotation of the first driving unit, two first guide rail units arranged in parallel on both sides of the first screw rod, a first connecting piece connected to the first screw rod, and a driven flange unit connected to the first connecting piece.

6. The grinding finishing device of the polishing and grinding apparatus according to claim 5, wherein The first guide rail unit comprises a longitudinal guide rail and at least two sliding blocks connected to the longitudinal guide rail in a sliding mode; the sliding blocks are further connected to the first connecting piece, and the longitudinal guide rail is connected to the first stand.

7. The grinding finishing device of the polishing apparatus according to claim 6, characterized by The first lifting mechanism further comprises an upper folding protective cover connected to an upper end edge of the first connecting piece, and a lower folding protective cover connected to a lower end edge of the first connecting piece.

8. The grinding finishing device of the polishing apparatus according to claim 7, characterized by The second lifting mechanism comprises a second driving unit, a second screw rod controlled by rotation of the second driving unit, second guide rail units arranged in parallel on both sides of the second screw rod, a second connecting piece connected to the second screw rod, and a driving flange unit connected to the second connecting piece; an upper end edge of the second connecting piece is further connected to an upper folding protective cover, and a lower end edge of the second connecting piece is further connected to a lower folding protective cover; and the upper folding protective cover and the lower folding protective cover are both organ type protective covers.

9. The grinding finishing device of the polishing apparatus according to claim 8, characterized by The driving flange unit comprises a flange driving piece, a right-angle commutator, and a driving flange disc; an output shaft of the flange driving piece is connected to an input end of the right-angle commutator, and an output end of the right-angle commutator is connected to the driving flange disc.

10. The grinding finishing device of the polishing apparatus according to claim 9, wherein ​

Images