Polishing device for large-size stones

Abstract

A polishing device for large-sized stones includes a frame; a belt conveyor mechanism; a swing frame, which is slidably mounted on the frame via a first linear guide; a first drive assembly for driving the swing frame to reciprocate along the first linear guide; a plurality of movable seats, which are arranged along the length direction of the frame, each movable seat is mounted on the swing frame via a second linear guide extending along the width direction of the frame, and each movable seat is provided with at least one grinding head. A plurality of second drive assemblies, which correspond one to one with a plurality of movable seats, and the second drive assemblies are used to drive the corresponding movable seats to reciprocate along the second linear guide. The present invention uses the longitudinal swing of the swing frame and the independent lateral swing of the plurality of movable seats to avoid the watermelon pattern caused by the polishing of the plurality of grinding heads on the same side of the stone surface at the same time, so that the time distribution of the grinding heads on the stone surface is balanced, and the consistency of the brightness and flatness of the stone surface is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of stone processing, and in particular to a polishing device for large-size stones. Background Art

[0002] Stone grinding and polishing is an important part of the stone processing process. It is to continuously grind the stone surface with a grinding head to make the stone surface reach a certain degree of smoothness.

[0003] Most of the current stone grinding and polishing devices use a belt conveyor mechanism to transport stone. A swing beam is arranged above the belt conveyor mechanism, and the slide rail seats fixed at both ends of the swing beam are slidably installed on the frame. When processing stone, the swing beam swings back and forth, driving the grinding head thereon to polish the surface of the stone. However, when processing some stones with larger widths, when the swing beam swings to the edge of the stone, the drive unit drives the swing beam to move in the opposite direction, which causes the grinding head to have a brief pause at the edge of the stone. That is to say, the grinding head spends more time grinding on the edge of the stone than on other parts of the stone, thereby affecting the consistency of the brightness and flatness of the stone surface; when processing dark stones, it may even form intermittent arc-shaped whitish stripes (called watermelon stripes in the industry). Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a polishing device for large-sized stones, which can evenly distribute the time of the grinding head on the stone surface to ensure the consistency of the brightness and flatness of the stone surface.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] Polishing device for large-size stones, comprising,

[0007] frame;

[0008] A belt conveyor mechanism mounted on the frame for conveying the stone and supporting the stone during grinding;

[0009] A swing frame is located above the belt conveyor mechanism, and the swing frame is slidably mounted on the frame via a first linear guide rail extending along the length direction of the frame;

[0010] A first driving assembly for driving the swing frame to reciprocate along the first linear guide rail;

[0011] A plurality of movable seats are arranged along the length direction of the frame, each movable seat is installed on the swing frame through a second linear guide rail extending along the width direction of the frame, and each movable seat is provided with at least one grinding head.

[0012] A plurality of second drive components are in one-to-one correspondence with the plurality of movable seats, and the second drive components are used to drive the corresponding movable seats to reciprocate along the second linear guide rail.

[0013] The swing frame includes two longitudinal beams located on both sides thereof and a plurality of transverse beams connected between the two longitudinal beams. The longitudinal beams are provided with first sliding blocks which are slidably matched with the first linear guide rails. The second linear guide rails are installed on the transverse beams, and the movable seats are arranged at intervals with the transverse beams.

[0014] The second driving assembly includes a second motor whose body is fixed on a movable seat, a transmission rod pivotally connected to the movable seat and synchronously connected to the output end shaft of the second motor, two transmission gears respectively connected to the two ends of the transmission rod, and two racks respectively fixed to the cross beams on both sides of the movable seat. A second sliding block cooperating with the second linear guide rail is provided on the movable seat, and the two gears are respectively engaged with the two racks.

[0015] An upper support beam and a lower support beam located below the upper support beam are fixed on the crossbeam, a rack is fixed on the lower surface of the upper support beam, a bottom of the gear is supported on the lower support beam, and a top is meshed with the rack.

[0016] A connecting block is fixed on the movable seat through an angle iron, the second slider is fixed on the connecting block, a side baffle is respectively arranged on both sides of the second linear guide rail, an upper baffle in a C shape with an opening facing downward is fixed on the crossbeam, and the two side edges of the upper baffle are respectively located on the outer sides of the two side baffles.

[0017] The movable seat is fixed with a main shaft seat, a lower sleeve which is connected to the main shaft seat and rotates with the main shaft seat, a main shaft which is connected to the lower sleeve, an upper sleeve located above the lower sleeve, a driving unit for driving the lower sleeve to rotate, and a cylinder for driving the upper sleeve to move up and down. A bushing is arranged between the main shaft and the lower sleeve. The bushing and the lower sleeve are synchronously connected by a key. The main shaft and the bushing are connected by a long key so that the main shaft and the bushing can rotate synchronously and slide axially. The top of the main shaft is hung on the upper sleeve, and a thrust bearing is arranged between the top of the main shaft and the upper sleeve. The telescopic rod of the cylinder is connected to the upper sleeve, and the driving unit is used to drive the lower sleeve to rotate; the grinding head is fixed to the bottom end of the main shaft.

[0018] The first driving assembly includes a first motor, a connecting seat installed on the first motor shaft, a guide column fixed on the connecting seat, a movable block movably sleeved on the guide column, and a connecting rod, one end of the connecting rod is hinged to the movable block and the other end is hinged to the swing frame.

[0019] A guide rail seat is fixed on the frame, and the first linear guide rail is fixed on the guide rail seat.

[0020] The beneficial effects of the present invention are:

[0021] Compared with the prior art, the present invention achieves longitudinal swing of the swing frame and independent lateral swing of multiple movable seats to avoid the watermelon pattern caused by multiple grinding heads polishing and grinding on the same side of the stone surface at the same time, so that the time distribution of the grinding heads on the stone surface is balanced, ensuring the consistency of brightness and flatness of the stone surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 for Figure 1 Magnified view at A in the middle;

[0024] Figure 3 for Figure 1 Magnified view at B in the middle;

[0025] Figure 4 is a schematic structural diagram of a second drive assembly;

[0026] Figure 5 It is a schematic diagram of the installation of the movable seat and the swing frame;

[0027] Figure 6 It is a schematic diagram of the grinding head driving structure;

[0028] Figure 7 is a cross-sectional view of the grinding head driving structure;

[0029] Figure 8 It is a schematic diagram of the working state of the present invention. DETAILED DESCRIPTION

[0030] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described:

[0031] like Figure 1-7As shown, a polishing device for large-sized stones of the present invention is used for grinding and polishing the surface of stones, especially for large-sized and large-sized stones. Specifically, the polishing device includes: a frame 100, a belt conveyor mechanism 200, a swing frame 300, and a plurality of movable seats 400, wherein the frame 100 is the installation base part of the entire device, the belt conveyor mechanism 200 is installed at the bottom of the frame 100 and is arranged along the length direction of the frame 100 (i.e., the X direction in the figure), the belt conveyor mechanism 200 is used to convey stones, specifically, the stones are placed on the belt of the belt conveyor mechanism 200, and the belt of the belt conveyor mechanism 200 is also used to provide sufficient support force for the stones when polishing the stones. The swing frame 300 is movably mounted on the frame 100, which is located above the belt conveyor mechanism 200. The frame 100 is provided with a first linear guide rail 101 extending along its length direction. The swing frame 300 is mounted on the frame 100 via the first linear guide rail 101. In this way, the swing frame 300 has the freedom to move in the length direction of the frame 100. A plurality of movable seats 400 are arranged along the length direction of the frame 100, and each movable seat 400 is installed on the swing frame 300 through a second linear guide rail 350 extending along the width direction of the frame 100 (i.e., the Y direction in the figure), that is, each movable seat 400 has the freedom to move relative to the swing frame 300 in the width direction of the frame 100, and the movement of each movable seat 400 is relatively independent, and at least one grinding head is installed on each movable seat 400, so that when the grinding head on each movable seat 400 moves in the width direction of the frame 100, it is independent; the present invention also includes a plurality of second drive components and a first drive component, and the plurality of second drive components correspond to the above-mentioned movable seats 400 one by one, and are respectively used to drive the corresponding movable seats 400 to reciprocate along the second linear guide rail 350, and each second drive component is also independently operated. The first drive component is used to drive the swing frame 300 to reciprocate along the first linear guide rail 101.

[0032] Combination Figure 8As shown, when the present invention is working, the belt conveyor mechanism 200 is used to drive the stone to perform the above-mentioned device. When it is detected that there is stone entering the working area, the first drive component and the second drive component start to grind the surface of the stone. The swing frequency of the swing frame 300 is set to 20 times / minute, and the maximum displacement of its reciprocating motion is 100mm. The swing frequency of each movable seat 400 is set to be different. For example, the swing frequency of the first movable seat 400 can be set to 6 times / minute, the swing frequency of the second movable seat 400 can be set to 8 times / minute, and the swing frequency of the third movable seat 400 can be set to 10 times / minute, and so on. Similarly, the rotation speed of the grinding head on each movable seat 400 is also different. For example, the rotation speed of the grinding head on the first movable seat 400 is set to 300r / min, the rotation speed of the grinding head on the second movable seat 400 is set to 350r / min, and the rotation speed of the grinding head on the third movable seat 400 is set to 400r / min, and so on. In this way, through the lateral movement of the grinding head and the longitudinal swing of the swing frame 300, the grinding head will not stop at any point on the stone surface, avoiding the formation of watermelon patterns. At the same time, a plurality of independently movable seats 400 are arranged on the swing frame 300 to avoid the formation of watermelon patterns caused by multiple grinding heads polishing and grinding the same side of the stone surface at the same time, thereby ensuring the uniform brightness of the stone surface.

[0033] like Figure 4 , 5The swing frame 300 includes two longitudinal beams 301 and multiple cross beams 302, wherein the two longitudinal beams 301 are respectively located on both sides of the swing frame 300, and the multiple cross beams 301 are connected between the two longitudinal beams 301. The longitudinal beam 301 is provided with a first slider that cooperates with the first linear guide rail 101, and the second linear guide rail is installed on the cross beam 302. The movable seat 400 is arranged at intervals with the cross beam 302, that is, the movable seat 400 is arranged between two adjacent cross beams 302. The second driving assembly includes a second motor 401, a transmission rod 402, two gears 403, and a rack 321, wherein the body of the second motor 401 is fixed on the movable seat 400, the middle part of the transmission rod 402 is synchronously connected to the power output end of the second motor 401, the extension direction of the transmission rod 402 is consistent with the length direction of the frame 100 and extends to the two beams 302 on both sides of the movable seat 400, the two gears 403 are respectively mounted on both ends of the transmission rod 402, and a rack 321 is respectively arranged on the two beams 302 on both sides of the movable seat 400, and the two gears 403 are respectively meshed with the racks on the two beams 302, so that when the second motor 401 is started, the gears and the racks interact with each other, so that the movable seat 400 moves along the second linear guide rail 350. A second slider 423 is arranged on both sides of the movable seat 400, and the two second sliders are respectively matched with the second linear guide rail 350 on the beams 302 on both sides of the movable seat 400. In order to make the lateral movement of the movable seat 400 more precise, the rack 321 of the present invention is arranged above the gear 403. Specifically, an upper support beam 322 and a lower support beam 323 located below the upper support beam 322 are fixed on the crossbeam 302, and the rack 321 is fixed to the lower surface of the upper support beam 322. The bottom of the gear 403 is supported on the lower support beam 322, and the top is engaged with the rack 321.

[0034] In addition, since a large amount of water is usually added when grinding stone, in order to prevent water mist and dust from affecting the second linear guide 350 and avoid poor operation of the movable seat 400 caused by water mist and dust, the present invention also provides a labyrinth-type shielding structure. Specifically, a connecting block 422 is fixed to the side of the movable seat 400 through an angle iron 421, and the second slider is fixed on the connecting block 422. A side baffle 351 is respectively provided on both sides of the second linear guide on the beam 302, and an upper baffle 352 is also fixed on the beam 302. The cross-section of the upper baffle 352 is a C-shape with an opening facing downward, and the two sides of the upper baffle 352 are respectively located on the outside of the two side baffles 351. In this way, a labyrinth structure composed of the side baffles 351 and the upper baffle 352 can prevent water mist and dust from entering the matching gap between the second linear guide and the second slider.

[0035] See also Figure 6 , 7, is a grinding head driving structure of the present invention. Specifically, a main shaft seat 411, a lower sleeve 412, a main shaft 410, an upper sleeve 415, a driving motor 417, and a cylinder 416 are arranged on the movable seat 400, wherein the lower sleeve 412 is inserted into the main shaft seat 411 and rotates with the main shaft seat 411, the main shaft 410 is inserted into the lower sleeve 412, the upper sleeve 415 is located above the lower sleeve 412, a bushing 413 is arranged between the main shaft 410 and the lower sleeve 412, the bushing 413 and the lower sleeve 412 are synchronously connected by a key, that is, the two rotate synchronously, the bushing 413 and the main shaft 410 are connected by a long key, that is, the main shaft 410 can rotate synchronously with the bushing 413, and can also rotate along its own axis The line slides relative to the bushing 413; the top of the main shaft 410 is hung on the upper sleeve 415, and a thrust bearing is arranged between the top of the main shaft 410 and the upper sleeve 415. The main shaft 410 can rotate relative to the upper sleeve 415, and can also move up and down along its own axis with the upper sleeve 415. The telescopic rod of the cylinder 416 is connected to the upper sleeve 415, which is used to drive the upper sleeve 415 to move up and down, that is, to drive the main shaft 410 to move up and down. A driving pulley (not shown) is synchronously connected to the rotating shaft of the driving motor 417, and a driven pulley 414 is fixed to the outside of the lower sleeve 412. The driving pulley and the driven pulley 414 are synchronously connected through a transmission belt (not shown); the grinding head is fixedly connected to the bottom end of the main shaft 410. During use, when it is detected that the stone enters the working area, the cylinder 416 drives the main shaft 410 to move downward, so that the grinding head contacts the surface of the stone, starts, and the driving motor 417 drives the main shaft 410 to rotate, and the grinding head is used to grind and polish the surface of the stone. It should be noted that the above-mentioned driving motor 417 can also be replaced by other driving units, such as a rotating cylinder, etc. In short, as long as it can drive the main shaft 410 to rotate.

[0036] See also Figure 3 As shown, the first driving component of the present invention includes a first motor 310, a connecting seat 311, a guide column 312, a movable block 313, and a connecting rod 314, wherein the body part of the first motor 310 is fixed on the frame 100, the connecting seat 311 is fixed on the rotating shaft of the first motor 310, the guide column 312 is installed on the connecting seat 311, the movable block 313 is movably sleeved on the guide column 312, one end of the connecting rod is hinged to the movable block 313, and the other end is hinged to the mounting seat 303 fixed to the front end of the swing frame 300, the first motor 310 is started, the connecting seat 311 is rotated, the movable block 313 reciprocates along the guide column 312, and the connecting rod 314 pulls or pushes the swing frame 300 to move, thereby causing the swing frame 300 to reciprocate.

[0037] See also Figure 3 A guide rail seat 102 is fixed on the frame 100 , and the first linear guide rail 101 is fixed on the guide rail seat 102 .

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A polishing device for large-size stones, characterized in that: include, frame; A belt conveyor mechanism mounted on the frame for conveying the stone and supporting the stone during grinding; A swing frame is located above the belt conveyor mechanism, and the swing frame is slidably mounted on the frame via a first linear guide rail extending along the length direction of the frame; A first driving assembly for driving the swing frame to reciprocate along the first linear guide rail; A plurality of movable seats are arranged along the length direction of the frame, each movable seat is mounted on the swing frame through a second linear guide rail extending along the width direction of the frame, and each movable seat is provided with at least one grinding head; A plurality of second drive assemblies, each of which corresponds to a plurality of movable seats, and the second drive assemblies are used to drive the movable seats corresponding thereto to reciprocate along the second linear guide rail; The swing frame includes two longitudinal beams located on both sides thereof, and a plurality of transverse beams connected between the two longitudinal beams. The longitudinal beams are provided with first sliding blocks that are slidably matched with the first linear guide rails. The second linear guide rails are installed on the transverse beams, and the movable seats are arranged at intervals with the transverse beams. The second driving assembly includes a second motor whose body is fixed on the movable seat, a transmission rod pivotally connected to the movable seat and synchronously connected to the output shaft of the second motor, two transmission gears respectively connected to the two ends of the transmission rod, and two racks respectively fixed to the crossbeams on both sides of the movable seat. The movable seat is provided with a second slider matched with the second linear guide rail, and the two gears are respectively meshed with the two racks; A connecting block is fixed on the movable seat through an angle iron, the second slider is fixed on the connecting block, a side baffle is respectively arranged on both sides of the second linear guide rail, an upper baffle in a C shape with an opening facing downward is fixed on the crossbeam, and the two side edges of the upper baffle are respectively located on the outer sides of the two side baffles.

2. The polishing device for large-size stone according to claim 1, characterized in that: An upper support beam and a lower support beam located below the upper support beam are fixed on the crossbeam, a rack is fixed on the lower surface of the upper support beam, a bottom of the gear is supported on the lower support beam, and a top is meshed with the rack.

3. The polishing device for large-size stone according to claim 1, characterized in that: The movable seat is fixed with a main shaft seat, a lower sleeve which is connected to the main shaft seat and rotates with the main shaft seat, a main shaft which is connected to the lower sleeve, an upper sleeve located above the lower sleeve, a driving unit for driving the lower sleeve to rotate, and a cylinder for driving the upper sleeve to move up and down. A bushing is arranged between the main shaft and the lower sleeve. The bushing and the lower sleeve are synchronously connected by a key. The main shaft and the bushing are connected by a long key so that the main shaft and the bushing can rotate synchronously and slide axially. The top of the main shaft is hung on the upper sleeve, and a thrust bearing is arranged between the top of the main shaft and the upper sleeve. The telescopic rod of the cylinder is connected to the upper sleeve, and the driving unit is used to drive the lower sleeve to rotate; the grinding head is fixed to the bottom end of the main shaft.

4. The polishing device for large-size stone according to claim 1, characterized in that: The first driving assembly includes a first motor, a connecting seat installed on the first motor shaft, a guide column fixed on the connecting seat, a movable block movably sleeved on the guide column, and a connecting rod, one end of the connecting rod is hinged to the movable block and the other end is hinged to the swing frame.

5. The polishing device for large-size stone according to claim 1, characterized in that: A guide rail seat is fixed on the frame, and the first linear guide rail is fixed on the guide rail seat.

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