Deburring machine
The deburring machine addresses vacuum breakdown issues by using a sub-vacuum chamber and negative pressure control to maintain stable vacuum pressure, enhancing workpiece stability and reducing power consumption.
Patent Information
- Application Number
- JP2024111854
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2026-01-23
Smart Images
Figure 2026011343000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a deburring machine, and more particularly to a deburring machine that removes burrs and adhering dross generated during the processing of metal products, molded products processed by punch presses, laser processing machines, etc., and performs surface polishing, etc. [Background technology]
[0002] The prior art that forms the background of the present invention includes a deburring device configured to remove burrs from the top surface of a workpiece by transporting the workpiece horizontally using a belt conveyor and contacting the workpiece from above with a roll-shaped deburring member that rotates around a horizontal axis. In this deburring device, the conveyor belt is formed with numerous air holes that penetrate from the conveying surface to the back surface. Air is sucked from the back side of the conveyor belt through the air holes, thereby adsorbing the workpiece to the conveying surface and preventing it from moving. In this case, the conveyor is a belt conveyor, and is configured with an endless conveyor belt wrapped around rollers at the front and rear ends of a conveyor frame. One roller is driven by a drive source such as a motor. The conveyor is also equipped with a workpiece adsorption device that adsorbs the workpiece to the conveying surface. This workpiece suction device is composed of countless air vents distributed over the entire surface of the conveyor belt, a negative pressure chamber provided on the underside of the conveyor belt's transport side running path and opening to the underside of the conveyor belt, and a suction device such as a suction blower that draws air into this negative pressure chamber (for example, Patent Document 1). In addition, other prior art includes a conveyor having a large number of round or elongated holes formed on the conveying surface of the conveyor as examples of ventilation holes for adsorbing and holding the workpiece on the conveying surface (for example, Patent Document 2). Furthermore, still another prior art that forms the background of the present invention is a polishing machine (for example, Patent Document 3) that polishes a workpiece fixed by a workpiece fixing part. The workpiece fixing part of this polishing machine has a horizontal workpiece placement part with many holes on the surface on which the workpiece is placed, and an air suction space part provided on the back side of the workpiece placement part, and is configured so that the workpiece placed on the surface of the workpiece placement part is fixed by suction by sucking air into the air suction space part through the holes. The workpiece placement section is composed of an endless belt (conveyor belt) wound around a pair of front and rear guide rollers rotatably mounted inside the device body, and this endless belt has multiple holes (air intake holes). An air suction space is provided in the internal space surrounded by the back surface of this endless belt. The air suction space has a container consisting of a bottom wall and a peripheral wall mounted around the bottom wall, and the upper opening of this container is equipped with a support plate with multiple holes and a friction resistance reduction plate arranged between the endless belt and the support plate, with multiple elongated holes arranged in a row and extending in the direction of movement of the endless belt. Therefore, when the air suction source is activated, the air suction space becomes negative pressure, and the air inside is discharged through the outlet air passage. The air discharged from the air suction space is introduced into the polishing section through the intake air passage. At this time, the air in the polishing section is drawn into the air suction space through the holes in the endless belt, and the workpiece placed on the endless belt is suction-fixed. In addition, the air suction space is appropriately divided (in a lattice pattern) by vertical and horizontal bars that cross each other on the inside of the peripheral wall, and these vertical and horizontal bars are configured to support the endless belt, friction resistance reduction plate, and support plate flat even under negative pressure. Meanwhile, another prior art that forms the background of the present invention is a transport conveyor for a surface treatment device that performs a desired treatment on the surface of a treatment target (workpiece). This transport conveyor has a number of through holes formed therein, and the workpiece is transported in the transport direction, passing through a rotating brush. A number of holding sheets are detachably attached to the conveyor belt. The holding sheets have a number of suction holes formed in them, with shapes, dimensions, and arrangements corresponding to the shape and dimensions of the workpiece. Then, by reducing the pressure in the suction chamber using a pressure reducing device, the workpiece is sucked and held onto the holding sheets through the suction holes (for example, Patent Document 4). [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent No. 5239654 [Patent Document 2] Patent No. 5896131 [Patent Document 3] Patent No. 7133211 Publication [Patent Document 4] Japanese Patent Application Laid-Open No. 2016-203275 Summary of the Invention
[0004] However, in the prior art shown in Patent Document 1, for example, of the countless air vents scattered over the entire surface of the conveyor belt, outside air (atmosphere) flows into a negative pressure chamber that is provided on the underside of the conveyor belt's transport side running path and opens onto the underside of the conveyor belt through the air vents of the conveyor belt on which no workpiece (object to be processed) is placed, and the vacuum pressure in the negative pressure chamber gradually decreases exponentially, causing a so-called vacuum breakdown, which reduces the vacuum pressure in the entire negative pressure chamber. This creates the problem that the workpiece may shift position as the deburring work progresses, making it impossible to securely hold the workpiece on the upper surface of the belt conveyor. Furthermore, even in the prior art shown in Patent Document 2, for example, even if the shape of the numerous ventilation holes for suction-holding the workpiece on the conveying surface is round or elongated, there were problems similar to those of the prior art shown in Patent Document 1. Furthermore, in the prior art shown in Patent Document 3, for example, the air suction space is structured so that it is appropriately divided (divided into a grid pattern) by vertical and horizontal bars that are connected to each other and cross the inside of the peripheral wall, and these vertical and horizontal bars are configured to support the endless belt, friction resistance reduction plate, and support plate flat even under negative pressure. However, there are still problems similar to those in the prior art shown in Patent Documents 1 and 2. On the other hand, for example, in the conventional technology shown in Patent Document 4, by using a holding sheet according to the shape and dimensions of the workpiece W, it is possible to hold a wide variety of workpieces well, and it is said that a surface treatment device using this transport conveyor can relatively improve treatment efficiency. However, with the transport conveyors and surface treatment devices according to the prior art, it was necessary to prepare multiple holding sheets each time, each with a number of suction holes formed and arranged in accordance with the shape and dimensions of the work (object to be treated), and attach them using hook-and-loop fasteners, adhesives, etc., which was time-consuming and ultimately did not significantly improve treatment efficiency. Furthermore, in this conventional technology, outside air (atmosphere) flows into the suction chamber above the interior of the conveyor through the many through holes in the conveyor to which the retaining sheet is not attached, and the vacuum pressure in the suction chamber gradually decreases, i.e., there was a problem similar to that of the conventional technology shown in Patent Document 1 and Patent Document 2. As described above, in any of the conventional techniques, the conventional workpiece suction structure allows more outside air to enter the vacuum chamber than necessary, causing the vacuum pressure in the vacuum chamber to decrease exponentially and resulting in vacuum breakdown. This causes the vacuum pressure in the entire vacuum chamber to decrease, which in turn reduces the suction force on the workpiece as the deburring work progresses, resulting in the workpiece being displaced, making it difficult to stably and reliably hold the workpiece on the suction surface of the belt conveyor, which is a technical problem. Typically, the pressure inside a pressure reduction chamber (vacuum chamber or negative pressure chamber) decreases as the amount of air exhausted from the pressure reduction chamber (vacuum chamber or negative pressure chamber) exceeds the amount of air flowing in through the suction holes of a belt conveyor. To increase the vacuum pressure, the flow rate of the blower (pressure reduction device or negative pressure generating means) can be increased to further increase the amount of air exhausted. However, the greater the amount of air exhausted, the greater the pressure loss and the higher the inverter current value, which increases the output of the blower motor itself and increases power consumption. In other words, the increased load on the pressure generating means hinders efforts to reduce power consumption.
[0005] Therefore, the main object of the present invention is to provide a deburring machine that can stably and securely hold a workpiece on the suction surface of a belt conveyor by vacuum pressure, and that enables reduction in the power consumption of a pressure reducing device such as a blower that applies vacuum pressure (negative pressure). [Means for solving the problem]
[0006] The present invention of claim 1 is a deburring machine comprising a conveying means for holding an object to be treated (workpiece) and conveying it in a predetermined direction, one or more rotating brushes arranged on the conveying means approximately parallel to the conveying path of the conveying means and contacting the object to be treated to perform deburring, a brush rotating means for rotating the rotating brush, a pressure reduction chamber arranged below the conveying path, and a pressure reduction device for reducing the pressure in the internal space of the pressure reduction chamber to a vacuum pressure, and equipped with an adsorption means for adsorbing and holding the object to be treated on the conveying path, wherein the deburring machine abuts against the conveying path of the conveying means and has a sub-vacuum chamber connected to the pressure reduction chamber at the part abutting against the conveying path, and the sub-vacuum chamber controls the inflow of air into the pressure reduction chamber and supports the vacuum pressure of the pressure reduction chamber. The present invention of claim 2 is an invention dependent on the invention of claim 1, and is a deburring machine characterized in that the conveying means has an endless circular conveying belt having a plurality of suction holes arranged from its front surface to its back surface, and includes a belt conveyor that suction-holds and conveys the object to be processed on the conveying surface of the conveying belt, the decompression chamber includes a decompression chamber body having a plurality of air holes in the top surface, and the plurality of suction holes in the conveying belt and the air holes in the top surface are connected via a sub-vacuum chamber. The present invention of claim 3 is an invention dependent on the invention of claim 2, and is a deburring machine characterized in that it further includes a negative pressure control member arranged on the top surface of the decompression chamber so as to abut against the conveyor belt, and which controls the inflow of air into the decompression chamber through the air vent in the top surface, thereby controlling the negative pressure within the decompression chamber, the negative pressure control member having a length and including a sliding plate made of a resin material, the sliding plate including a sliding plate body, suction holes penetrating the sliding plate body in the thickness direction and communicating with the air vent in the top surface, and communication passages spaced apart in the width direction of the sliding plate body and extending from one end of the sliding plate body in the length direction to the other on both radial sides of the suction holes, allowing communication between the suction holes and the air vent, and the sub-vacuum chamber including the communication passage. The present invention of claim 4 is an invention dependent on the invention of claim 3, and is a deburring machine characterized in that the communicating passage includes a groove portion extending in the thickness direction of the sliding plate body, one end of the groove portion being open to the upper surface of the sliding plate body and the other end being connected to the inner surface side of the air vent hole. The present invention of claim 5 is an invention dependent on the invention of claim 4, and is a deburring machine characterized in that the sliding plate body further includes, in a plan view, another connecting passage extending parallel to the connecting passage in the intermediate portion between one connecting passage and the other connecting passage in the radial direction of the suction hole, and the other connecting passage includes a recess passing through the central portion of the suction hole in a plan view and extending from one end to the other end in the longitudinal direction of the sliding plate body. The present invention of claim 6 is an invention dependent on the invention of claim 3, and is a deburring machine characterized in that it has a plurality of suction holes arranged at intervals in the width direction of the sliding plate body, and another recess is arranged between the suction holes, and the another recess reduces the frictional resistance between the conveying belt and the sliding plate. The present invention of claim 7 is an invention dependent on the invention of any one of claims 1 to 6, and is a deburring machine characterized in that the conveying means includes a brush rotation motor, a vertical shaft rotated by the rotational driving force of the brush rotation motor, a plurality of orthogonal shafts arranged at intervals circumferentially of the vertical shaft and arranged in a direction perpendicular to the vertical shaft, and a non-contact transmission mechanism that transmits the rotation of the vertical shaft to the orthogonal shafts in a non-contact manner, and the non-contact transmission mechanism includes a driving rotation unit connected to one axial end side of the vertical shaft, a plurality of driven rotation units connected to one axial end sides of the orthogonal shafts, a plurality of first magnets arranged on a main surface near the outer periphery of the driving rotation unit so that north poles and south poles alternate, and a plurality of second magnets arranged on a circumferential end surface of the driven rotation unit so that north poles and south poles alternate, and the plurality of first magnets and the plurality of second magnets are arranged to face each other in a non-contact state with a gap between them. [Effects of the Invention]
[0007] According to the present invention, there is provided a deburring machine that can stably and reliably hold a workpiece on the suction surface of a belt conveyor by vacuum pressure, and that can reduce the power consumption of a pressure reducing device such as a blower that applies vacuum pressure (negative pressure).
[0008] The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]
[0009] [Figure 1] 1 is a perspective view showing an example of a deburring machine according to the present invention. [Figure 2] FIG. 2 is a left side view of FIG. [Figure 3] 3A and 3B are plan views illustrating the configuration of the conveying means and pressure reducing means of the deburring machine according to the present invention and their surroundings, in which FIG. 3A is a plan view and FIG. 3B is a side view. [Figure 4] The deburring machine according to the present invention is an exploded perspective view showing a main part of the deburring machine, and is an illustrative view showing the arrangement of a decompression chamber body, a top plate of the decompression chamber body, and a negative pressure adjusting member. [Figure 5A] FIG. 10 is an external view showing a state in which a negative pressure adjusting member is installed on the top plate of the decompression chamber. [Figure 5B] FIG. 5B(B) is a partially enlarged perspective view of the negative pressure adjusting member shown in FIG. 5A(A), and FIG. 5B(C) is a cross-sectional view taken along the line AA of FIG. 5B(B). [Figure 6] FIG. 2 is a perspective view of a main part inside a housing of the deburring machine according to the present invention. [Figure 7] FIG. 7 is a partially enlarged view of the main part of FIG. 6 (showing the rotary brush and its surroundings). [Figure 8] 8A and 8B are perspective views of essential parts showing an example of a brush rotation means applied to a deburring machine according to the present invention, where (A) in FIG. 8 is a perspective view of essential parts seen from below, (B) in FIG. 8 is a perspective view of essential parts seen from diagonally above, and (C) in FIG. 8 is a perspective view of essential parts seen from diagonally below. [Figure 9] FIG. 10 is another perspective view of the main part (showing the swivel mechanism, the lift mechanism and their surroundings) inside the housing of the deburring machine according to the present invention. [Figure 10] FIG. 10 is a bottom view showing the main part of FIG. 9. [Figure 11] FIG. 10 is a perspective view of still another essential part (showing the lifting mechanism and its periphery) inside the housing of the deburring machine according to the present invention. [Figure 12] FIG. 10 is a perspective view of still another essential part (showing the swing mechanism and its surroundings) inside the housing of the deburring machine according to the present invention. [Figure 13] FIG. 13 is a front view showing the main part of FIG. 12. [Figure 14] 1 is a perspective view of a rotary brush applied to a deburring machine according to the present invention; FIG. [Figure 15] 15 is an enlarged cross-sectional view taken along line BB in FIG. 14. [Figure 16] 16A and 16B are explanatory diagrams showing the setting of the origin position of the rotary brush of the deburring machine according to the present invention (setting of the origin of the brush), where FIG. 16A is an explanatory diagram showing the main parts, and FIG. 16B is an explanatory diagram showing other main parts. [Figure 17]These are explanatory diagrams for explaining the action and effect of the "sub-vacuum chamber" in the deburring machine of the present invention, and Figures 17(A) and (B) are explanatory diagrams of the suction state of the object to be processed (work) when the air vent of the decompression chamber body, the suction hole of the negative pressure adjustment member, and the suction hole of the conveying belt are connected, Figures 17(C) and (D) are explanatory diagrams of the suction state of the object to be processed when the sub-vacuum chamber is not arranged in the negative pressure adjustment member, and Figures 17(E) and (F) are explanatory diagrams of the suction state of the object to be processed when the sub-vacuum chamber is arranged in the negative pressure adjustment member. [Figure 18A] 18A is a perspective view of a main part showing a state of, for example, a belt conveyor as a conveying means in a deburring machine according to the present invention. (B) of Fig. 18A is a schematic cross-sectional view of a main part showing a state when an object to be processed is sucked and held on the upper surface of the conveying belt of the belt conveyor shown in (A) of Fig. 18A, and also showing the action and effect of the sub-vacuum chamber. [Figure 18B] This is an explanatory diagram showing a model of the cross section of the uneven state measured using a surface roughness measuring device to measure the roughness, waviness, and shape of the underside of the conveyor belt of the belt conveyor that abuts against the upper surface of the negative pressure adjustment member applied to the deburring machine of the present invention. [Figure 19] The results of a comparison of the suction force of the deburring machine according to the present invention and a conventional deburring machine are shown in Fig. 19(A) as a table and Fig. 19(B) as a graph. [Figure 20] The results of a comparison of the power consumption of the deburring machine according to the present invention and a conventional deburring machine are shown in Fig. 20 (A) as a table and Fig. 20 (B) as a graph. DETAILED DESCRIPTION OF THE INVENTION
[0010] As an example of a deburring machine for carrying out the invention of the present invention, the deburring machine has, for example, a belt conveyor as a conveying means for holding a workpiece and conveying it in a predetermined direction, a rotating brush that is arranged approximately parallel to the conveying surface (conveying path) of the conveying belt of the belt conveyor and contacts the workpiece to perform the deburring process, a brush rotating means for rotating the rotating brush, a pressure reduction chamber arranged below the conveying surface of the conveying belt, and a pressure reduction device for reducing the pressure in the internal space of the pressure reduction chamber to a vacuum pressure, and is equipped with an adsorption means for adsorbing and holding the workpiece on the conveying surface of the conveying belt, and is characterized in that a sub-vacuum chamber that abuts on the conveying surface of the conveying belt and communicates with the pressure reduction chamber is arranged at the part abutting on the conveying surface, and the sub-vacuum chamber adjusts, regulates, etc. the inflow of atmospheric air into the pressure reduction chamber and supports the vacuum pressure of the pressure reduction chamber. In this case, it is preferable that the decompression chamber includes a decompression chamber body having a plurality of air vents in the top surface thereof, and that the plurality of suction holes in the conveying belt and the air vents in the top surface thereof are connected via a sub-vacuum chamber. Furthermore, the vacuum chamber further includes a negative pressure control member disposed on the top surface thereof so as to abut against the conveyor belt, for controlling the inflow of air into the vacuum chamber through the air vents in the top surface and controlling the negative pressure within the vacuum chamber, the negative pressure control member having a length and including a sliding plate formed of a resin material, the sliding plate including a sliding plate body, suction holes penetrating the sliding plate body in the thickness direction and communicating with the air vents in the top surface, and communication passages spaced apart in the width direction of the sliding plate body and extending from one end of the sliding plate body in the length direction to the other on both radial sides of the suction holes, allowing communication between the suction holes and the air vents, and it is more preferable that the sub-vacuum chamber includes the communication passages. Furthermore, it is even more preferable that the communicating passage includes a groove portion extending in the thickness direction of the sliding plate body, and that one end of the groove portion is open to the upper surface of the sliding plate body and the other end is connected to the inner surface side of the air vent hole.
[0011] FIG. 1 is a perspective view showing an example of a deburring machine according to the present invention, and FIG. 2 is a left side view of FIG. 1. This deburring machine 10 includes a housing 12, as shown in FIGS. 1 and 2. The housing 12 houses a main body frame 14, as shown in FIG. 6, for example. As shown in FIG. 7, the main body frame 14 includes a conveying means 16 for conveying a workpiece (hereinafter simply referred to as "workpiece"), a plurality of rotating brushes 18 for deburring the workpiece, and a brush rotating means 82 for rotating the plurality of rotating brushes 18. As shown in FIGS. 9 and 10, the main body frame 14 also includes a pivoting mechanism 22 for pivoting the plurality of rotating brushes 18 and an elevating mechanism 24 for vertically raising and lowering the plurality of rotating brushes 18. Furthermore, as shown in FIGS. 11, 12, and 13, the main body frame 14 also includes a swinging mechanism 26 for swinging the plurality of rotating brushes 18 in the width direction of the conveying path relative to the conveying direction of the conveying means 16 (the longitudinal direction of the conveying path). 6, a pressure reducing device 30 is disposed on the main body frame 14 to reduce the pressure in the internal space of a pressure reducing chamber 28 disposed below the conveying path of the conveying means 16. The pressure reducing device 30 (such as a blower) sucks air from the pressure reducing chamber 28 via an intake duct pipe 32.
[0012] Fig. 3 is a plan view illustrating the configuration of the conveying means and pressure reducing means of the deburring machine according to the present invention, and their surroundings, with Fig. 3(A) being a plan view and Fig. 3(B) being a side view. Fig. 4 is an exploded perspective view illustrating the main parts of the deburring machine according to the present invention. Fig. 4 is a configuration diagram illustrating the arrangement of the pressure reducing chamber body, the top plate of the pressure reducing chamber body, and the negative pressure adjusting member. As shown in FIGS. 3 and 18A(A), the conveying means 16 of the deburring machine 10 is, for example, a dual-type belt conveyor-type conveying device, and includes housing-like conveyor frames 38, 38 for mounting the belt conveyor and other components. Conveyor drive rollers 40, 40 and conveyor driven rollers 42, 42 of the belt conveyor are rotatably mounted on one and the other longitudinal ends of the conveyor frames 38, 38, respectively, so that they are parallel to each other. In this embodiment, the conveyor drive rollers 40, 40 and the conveyor driven rollers 42, 42 each consist of two rollers of the same length connected to the same shaft. Endless, circular conveyor belts 44, 46 are looped between the conveyor drive rollers 40, 40 and the conveyor driven rollers 42, 42, respectively. The conveyor belts 44, 46 have a plurality of suction holes 48, e.g., circular in plan view, penetrating from one main surface to the other. The plurality of suction holes 48 are arranged, for example, in a staggered pattern. The conveyor drive rollers 40, 40 are driven by conveyor drive motors 50, 50, respectively.
[0013] As shown in Figures 4, 5A and 18A(A), two decompression chambers 28 are disposed below the conveyor belts 44 and 46, respectively, between the frames 38 of the belt conveyor of the conveying means 16. Since the two decompression chambers 28 have the same structure, only one of the decompression chambers 28 will be described below. 4, the decompression chamber 28 particularly includes a decompression chamber main body 28A that is, for example, boat-shaped and open at the top. Rectangular plates 52, 52 are disposed on one and the other longitudinal ends of the decompression chamber main body 28A, respectively, spanning from one end to the other widthwise end, and the decompression chamber main body 28A is supported by the main body frame 14 by these plates 52, 52. In addition, a frame 54 that is rectangular in plan view is disposed on the open upper end of the decompression chamber main body 28A.
[0014] Furthermore, within the decompression chamber main body 28A, for example, four partition plates 56 are arranged in parallel at intervals in the width direction of the frame 54. These four partition plates 56 extend from one end to the other in the longitudinal direction inside the frame 54. Each of the four partition plates 56 has, for example, three circular through holes 58 in the middle portion in the longitudinal direction, and the three through holes 58 of each partition plate 56 are arranged on the same central axis. Three air intake ports 60 penetrating from one side surface in the width direction of the decompression chamber main body 28A and protruding outward are respectively connected to the three through holes 58 of the four partition plates 56, and the three air intake ports 60 extend into one side duct 64. Three air intake ports 62 penetrating from the other side surface in the width direction of the decompression chamber main body 28A and protruding outward are also connected to the three through holes 58 of the four partition plates 56, and the three air intake ports 62 extend into the other side duct 66. Dust such as dust after deburring and dust from the transport path discharged from the one and other side ducts 64 and 66 is sent to the dust collector 36 through the exhaust duct pipe 34 shown in FIG. 2.
[0015] Inside the frame 54 of the decompression chamber main body 28A, two rectangular top plates 68, 68 are placed on top of the four partition plates 56. The top plates 68, 68 are made of, for example, a metal material and fixed with fastening means such as screws. Each top plate 68 has a plurality of vent holes 70 penetrating through it in the thickness direction. The plurality of vent holes 70 are arranged in a grid pattern in the longitudinal and width directions of each top plate 68, and are arranged at a predetermined pitch in each of the longitudinal and width directions of each top plate 68.
[0016] Furthermore, as shown in FIGS. 4, 5B(B), and 5B(C), two sliding plates 72, for example, are disposed on the top plate 68 of one decompression chamber body 28A as a negative pressure control member. That is, the negative pressure control member includes a sliding plate 72, which in turn includes a sliding plate main body 72A. The sliding plate main body 72A is formed, for example, of a rectangular resin plate having a length direction. Similarly, two sliding plates 72 are disposed on the top plate 68 of the other decompression chamber body 28A. Each sliding plate 72 is disposed so as to abut against the underside of the conveyor belts 44, 46 of the belt conveyor. Each sliding plate body 72A has a suction hole 74 that penetrates through the thickness direction and has, for example, a circular shape in plan view. The suction holes 74 are arranged so as to communicate with the vent holes 70 in the top plate 68 of the decompression chamber 28A. The plurality of suction holes 74 are arranged in a grid pattern in the longitudinal and width directions of each sliding plate body 72A, and are arranged at a predetermined pitch in the longitudinal and width directions of each sliding plate body 72A. In this case, the pitch of the suction holes 74 arranged in the sliding plate body 72A is the same as the pitch of the vent holes 70 arranged in the top plate 68 of the decompression chamber 28.
[0017] As shown in FIGS. 4, 5B(B), and 5B(C), the sliding plate 72 has, for example, grooves 76 arranged as communication passages at intervals in the width direction of the sliding plate body 72A and on both radial sides of the suction holes 74 of the sliding plate body 72A. The grooves 76 are rectangular in plan view and inverted U-shaped in cross section. That is, the grooves 76 extend from one end of the sliding plate body 72A in the longitudinal direction to the other end of the conveyor belts 44, 46. The grooves 76 are also arranged in the thickness direction of the sliding plate body 72A. One end of the grooves 76 in the thickness direction opens to the upper surface of the sliding plate body 72A, and the other end in the thickness direction communicates with the inner circumferential surface of the vent hole 70 in the top plate 68 of the decompression chamber 28. In this case, the groove portion 76 that abuts against the conveying surface (conveying path) of the conveyor belts 44, 46 of the belt conveyor is connected to the decompression chamber 28 and functions as a sub-vacuum chamber that controls the inflow of atmospheric air into the decompression chamber 28 and thereby controls the vacuum pressure of the decompression chamber 28. In the embodiment of the present invention, as shown in FIG. 18A(B), when the width of the groove 76 is W1, the length is L1, and the depth is D1, For example, it is formed so that W1=1.0 mm, L1=760 mm, and D1=1.0 mm. Furthermore, when the distance from the center of the suction holes 48 of the conveyor belts 44, 46 to the width center of the grooves 76 is Ls, for example, Ls=3.5 mm.
[0018] Furthermore, the sliding plate body 72A further includes, in a plan view, a recess 78, for example, as another communicating passage extending parallel to the one groove 76 and the other groove 76, in an intermediate portion, in this case, approximately the center, between one groove 76 and the other groove 76 in the radial direction of the suction hole 74. This recess 78 passes through the center of the suction hole 74 in a plan view and extends from one end to the other end in the longitudinal direction of the sliding plate body 72A. This recess 78 functions as a secondary sub-vacuum chamber that secondarily supports the groove 76, which functions as a sub-vacuum chamber. In the embodiment of the present invention, as shown in FIG. 18A(B), when the width of the recess 78 is W2, the length is L2, and the depth is D2, For example, it is formed so that W2=4.0 mm, L2=760 mm, and D2=1.0 mm.
[0019] The sliding plate body 72A also has a plurality of suction holes spaced apart in the width direction of the sliding plate body 78A, with another recess 80 disposed between the suction holes. The recess 80 is disposed from one end to the other in the longitudinal direction of the sliding plate body 72A. The recess 80 reduces frictional resistance between the conveyor belts 44, 46 and the sliding plate 72. In the embodiment of the present invention, as shown in FIG. 18A(B), when the width of another recess 80 is W3, the length thereof is L3, and the depth thereof is D3, For example, it is formed so that W3=8.0 mm, L3=760 mm, and D3=0.5 mm.
[0020] Similarly, the structure of the other decompression chamber 28 and the sliding plate 72 disposed thereon is the same as the structure of the one decompression chamber 28 and sliding plate 72 described above.
[0021] In this deburring machine 10, the two decompression chambers 28, 28 are each formed in a boat shape, so that the airflow sucked into the decompression chamber 28 from the suction holes 48 on the upper surfaces of the conveyor belts 44, 46 is uniformly dispersed inside the two decompression chambers 28, 28. Therefore, a more even suction force can be obtained from the suction holes 48 of the conveyor belts 44, 46. In addition, in this deburring machine 10, the air sucked from the suction holes 48 at all locations where the workpiece W is not placed on the conveyor belts 44, 46 first enters the groove 76 (sub-vacuum chamber) of the sliding plate 72, and is then discharged to the outside through the air vent 70 in the top plate 68 of the decompression chamber 28 and the decompression chamber 28. In this case, as shown in Figures 17(E) and (F), the air sucked through the suction holes 48 leaks through the gap between the rough underside (lining) of the conveyor belts 44, 46 and the abutting slide plate 72, before reaching the groove 76 (auxiliary vacuum chamber). On the other hand, the flow velocity of the suction holes 48 that are blocked by the placement of the workpiece W is zero. In other words, according to the Darcy-Weisbach equation, no pressure loss occurs, and the internal pressure of the blocked suction holes 48 becomes equal to the internal pressure of the groove 76 (auxiliary vacuum chamber). Furthermore, to minimize pressure changes within the groove 76 (auxiliary vacuum chamber) due to air flowing in through the suction holes 48, the groove 76 (auxiliary vacuum chamber) is spaced, for example, 3.5 mm from the suction holes 48. This distance determines the pressure loss. The pressure within the groove 76 (auxiliary vacuum chamber) is diluted by the vacuum pressure within the decompression chamber 28 and the air flowing in through the suction holes 48. However, the action of the groove 76 (auxiliary vacuum chamber) ensures that the diluted vacuum pressure maintains the suction force required by the suction holes 48 of the conveyor belts 44 and 46. In other words, a suction volume slightly greater than the amount of air entering the groove 76 (auxiliary vacuum chamber) is sufficient to prevent a vacuum breakdown. For example, as shown in Figures 17(E) and 17(F) and 18(B) of Figure 18A, the groove 76 (auxiliary vacuum chamber) and the suction holes 48 of the conveyor belts 44 and 46 are always kept at a constant distance, and air passes through the gap between the upper surface of the slide plate 72 and the lower surface of the conveyor belts 44 and 46 to prevent a vacuum breakdown in the suction holes. On the other hand, if the sliding plate 72 does not have the groove 76 (sub-vacuum chamber), the vacuum pressure charged inside the suction holes 48 of the conveyor belts 44, 46 will decrease exponentially, as shown in Figures 17(C) and 17(D), until the vacuum is broken and the suction force of the suction holes 48 can no longer be maintained.
[0022] In this deburring machine 10, the action of the groove portion 76 (sub-vacuum chamber) described above keeps the recess 78, which is, for example, 4 mm wide and 1.0 mm deep, as shown in Figures 5B and 18A, at a pressure lower than atmospheric pressure, thereby increasing the static pressure (vacuum pressure) of the suction holes 48 of the conveyor belts 44 and 46, and making it possible to slow down the time until the vacuum is broken even when the suction holes 48 are not connected to the air vent 70 in the top plate 68 of the decompression chamber 28.Furthermore, by minimizing the intrusion of atmospheric air (outside air) through the suction holes 48 of the conveyor belts 44 and 46 when no workpiece W is placed on them, the vacuum pressure inside the decompression chamber 28 and the decompression device 30 (blower, etc.) can be maintained, and by reducing the air resistance to the blades of the blower motor, it is possible to reduce the power consumption (current value) of the blower motor itself.
[0023] In this deburring machine 10, when the suction holes 48 of the conveyor belts 44 and 46, the suction holes 74 of the sliding plate 72, and the vent holes 70 of the top plate 68 of the decompression chamber 28 are aligned, as shown in Figures 17(A) and 17(B), for example, vacuum pressure is charged, and the suction force of the suction holes 48 suctions and holds the workpieces W on the upper surfaces of the conveyor belts 44 and 46. However, even in places where no workpieces W are placed on the upper surfaces of the conveyor belts 44 and 46, the above-mentioned three holes (suction holes 48, suction holes 74, and vent holes 70) are always in communication and aligned. This allows outside air to enter through the suction holes 48 of the conveyor belts 44 and 46 where no workpieces W are placed, resulting in a wasteful inflow of outside air and a decrease in the vacuum pressure inside the decompression chamber 28. This results in a large loss and cannot solve the problem of a decrease in vacuum pressure, i.e., a decrease in the suction force at the suction holes 48 and an increase in the current value of the decompression device 30 (blower motor, etc.).
[0024] In contrast, in the deburring machine 10 according to the present invention, even when the three holes (suction hole 48, suction hole 74, and vent hole 70) are aligned at a location on the conveyor belts 44 and 46 where no workpiece W is placed, the slide plate 72 prevents the inflow of outside air (atmospheric air) from the location where no workpiece W is placed. The sub-vacuum chamber (groove 76) supports the vacuum pressure until the conveyor belts 44 and 46 move over the slide plate 72 and reach the next location where the three holes (suction hole 48, suction hole 74, and vent hole 70) are aligned. This secondary charge of vacuum pressure prevents the above-mentioned vacuum breakdown. This allows the vacuum pressure inside the vacuum chamber 28 to be efficiently maintained, reducing the output of the pressure-reducing device 30, such as a blower, thereby saving power and reducing noise. Therefore, the effect of the sub-vacuum chamber (groove portion 76) is achieved whether or not the suction holes 48 of the conveyor belts 44 and 46, the suction holes 74 of the sliding plate 72, and the ventilation holes 70 of the top plate 68 of the decompression chamber 28 are aligned. In short, the action of the sub-vacuum chamber (groove portion 76) restricts the inflow of atmospheric air (outside air), and the vacuum pressure in the decompression chamber 28 can be maintained regardless of whether or not the workpiece W is placed on the conveying belts 44 and 46, making it possible to stably and accurately adsorb and hold the workpiece W on the conveying belts 44 and 46.
[0025] Fig. 19 shows the results of an experiment comparing the suction force of a deburring machine according to the present invention and a conventional deburring machine, with Fig. 19(A) showing a table and Fig. 19(B) showing a graph. Also, Fig. 20 shows the results of an experiment comparing the power consumption of a deburring machine according to the present invention and a conventional deburring machine, with Fig. 20(A) showing a table and Fig. 20(B) showing a graph. In this experimental example, differential pressures were measured using a differential pressure gauge across multiple suction holes at arbitrary positions on the conveyor belt and other suction holes in the vicinity thereof for the deburring machine 10 of the present invention having a sub-vacuum chamber (groove 76), a conventional deburring machine without the sub-vacuum chamber (groove 76) (blower discharge pressure of 15 kW), and a conventional deburring machine without the sub-vacuum chamber (groove 76) (blower discharge pressure of 11 kW). According to the inventor's experiments, the suction force of the suction holes in the conveyor belt in the deburring machine 10 of the present invention having the sub-vacuum chamber (groove 76) was approximately 1.8 times higher in differential pressure than the conventional deburring machine without the sub-vacuum chamber (groove 76) (blower discharge pressure of 11 kW).
[0026] Furthermore, when performing deburring work, the inverter current value of the blower in the deburring machine 10 of the present invention, which has a sub-vacuum chamber (groove portion 76), is approximately 38% lower than that of a conventional deburring machine that does not have a sub-vacuum chamber (groove portion 76). In other words, it is clear that the deburring machine 10 of the present invention, which has a sub-vacuum chamber (groove portion 76), has a higher suction force of the suction holes in the conveying belt and consumes less power than conventional deburring machines which do not have the sub-vacuum chamber (groove portion 76).
[0027] Fig. 6 is a perspective view of the main part inside the housing of the deburring machine according to the present invention, and Fig. 7 is a partially enlarged view of the main part (showing the rotating brush and its surroundings) of Fig. 6. Also, Fig. 8 is a perspective view of the main part showing an example of brush rotating means applied to the deburring machine according to the present invention, where Fig. 8(A) is a perspective view of the main part seen from below, Fig. 8(B) is a perspective view of the main part seen from diagonally above, and Fig. 8(C) is a perspective view of the main part seen from diagonally below. The brush rotation means 82 of this deburring machine 10 includes a brush rotation motor 20 such as a gear motor as a rotation drive device, and a spindle shaft branching mechanism 84. The spindle shaft branching mechanism 84 includes one vertical shaft 86, six orthogonal shafts 88, for example, arranged at equal intervals around the circumference of the vertical shaft 86, and a non-contact transmission mechanism 90. Two disk-shaped driving rotors 92a, 92b are connected to one end and the other end of the vertical shaft 86, spaced apart in the vertical direction. The two driving rotors 92a, 92b are arranged so that their outer circumferential main surfaces face each other.
[0028] On the other hand, a driven rotation portion 94 is connected to one axial end of each of the six orthogonal shafts 88, and a rotary brush 18 is connected to the other axial end. Of the six driven rotation portions 94, three are formed as large diameter rotation portions, and the other three are formed as small diameter rotation portions. The output shaft of the brush rotation motor 20 is connected to the vertical shaft 86 and is rotatable around the vertical shaft 86. Since the six orthogonal shafts 88 and the one vertical shaft 86 are disconnected from each other, the rotational driving force of the brush rotation motor 20 is not directly transmitted to the orthogonal shaft 88. The non-contact transmission mechanism 90 transmits the rotational force of the driving rotating parts 92a, 92b to the six driven rotating parts 94 with the main plate surfaces near the outer periphery of the driving rotating parts 92a, 92b facing the peripheral end faces of the six driven rotating parts 94. The cylindrical housing 85 is a housing portion for the vertical shaft 86 of the spindle shaft branching mechanism 84, and the drum-shaped housing 91 is a housing portion for the orthogonal shaft 88 of the spindle shaft branching mechanism 84 and the non-contact transmission mechanism 90.
[0029] The non-contact transmission mechanism 90 is composed of a plurality of first magnets 96 and a plurality of second magnets 98. A gap 100 is formed between the first magnets 96 and the second magnets 98. In other words, the first magnets 96 and the second magnets 98 are not in contact with each other. The first magnets 96 are arranged on the main plate surfaces near the outer periphery of the driving rotating parts 92a, 92b with their north and south poles alternating. The second magnets 98 are arranged on the circumferential end surface of the driven rotating part 94 with their north and south poles alternating. When the drive rotating parts 92a, 92b rotate, the first magnet 96 also rotates. The north pole of the first magnet 96 repels the north pole of the second magnet 98 and tries to attract the south pole of the second magnet 98. The south pole of the first magnet 96 repels the south pole of the second magnet 98 and tries to attract the north pole of the second magnet 98. By repeating this process, the rotational force of the drive rotating parts 92a, 92b around line yy is transmitted to the driven rotating part 94, causing the driven rotating part 94 to rotate around line xx. Contact slippage does not occur in the non-contact transmission mechanism 90. As a result, precise speed control is possible, and heat is not generated during the transmission of rotational force between the driving rotors 92a, 92b and the driven rotor 94. Furthermore, complex control such as periodically increasing and decreasing the rotational speed of the driving rotors 92a, 92b and the driven rotor 94 is also possible.
[0030] 6, 9, 10, 11 and 12, the brush rotation means 82 is incorporated into a rectangular plate-shaped oscillating base 104 disposed on a horizontally elongated rectangular frame-shaped lifting base 102. The lifting base 102 will be described later in the description of the lifting mechanism 24, and the oscillating base 104 will be described later in the description of the oscillating mechanism 26.
[0031] FIG. 9 is another perspective view of the main part (showing the swivel mechanism, the lift mechanism and their surroundings) inside the housing of the deburring machine according to the present invention, and FIG. 10 is a bottom view showing the main part of FIG. The rotation mechanism includes a brush rotation motor 22, such as a gear motor. A large-diameter pulley 106 is fixed to the axially intermediate portion of a cylindrical housing portion 87 of a vertical shaft 86. The pulley 106 is disposed on the underside of a swing base 104, and four small-diameter pulleys 108 are disposed on the underside of the swing base 104 at four corners, spaced apart from the pulley 106. A timing pulley 110 is fixed to the drive shaft of the brush rotation motor 22, and an endless timing belt 112 is looped around the timing pulley 110, the pulley 106, and the four pulleys 108, as shown in FIG. 10, for example. In this rotation mechanism, when brush rotation motor 22 is driven, its rotational force is transmitted to pulley 106 via timing pulley 110 and four pulleys 108. As a result, drum-shaped housing portion 91 rotates in conjunction with the rotation of cylindrical housing portion 87. In other words, six rotating brushes 18 can rotate around the axial direction of cylindrical housing portion 87.
[0032] FIG. 11 shows another example of the lifting mechanism and its components in the housing of the deburring machine according to the present invention. The lifting mechanism includes a lifting base 102 having, for example, a rectangular frame shape. Guide posts 114 are rotatably supported at the four corners of the lifting base 102. Each of the four guide posts 114 has a shaft portion therein having a trapezoidal threaded surface (not shown) extending from its axial middle to its lower end. Each of the four corners of the lifting base 102 has a threaded hole 116 having a threaded surface (female thread surface) that can be threadedly engaged with the threaded surface (male thread surface) of the shaft portion of the guide post 114. A drive shaft of, for example, a worm gear motor serving as a brush lifting motor 24 is connected to the upper end of the shaft portion of the post guide 114. The brush lifting motor 24 is held by a support frame 118 supported by the main body frame 14. A chain wheel 120 is fixed to the axial upper side of each of the four post guides 114. A chain belt 122 is looped around the four chain wheels 120.
[0033] Furthermore, this lifting mechanism has, for example, three limit switches 124a, 124b, and 124c disposed near the lifting base 102. The three limit switches 124a, 124b, and 124c are each held by a rectangular holding bracket 126 having a longitudinal direction. The three limit switches 124a, 124b, and 124c are disposed in the order 124a, 124b, and 124c from top to bottom at intervals along the longitudinal direction (vertical direction) of the holding bracket 126. One end of the holding bracket 126 in the longitudinal direction is attached to the support frame 118, and the other end of the holding bracket 126 in the longitudinal direction is attached to the installation base 15. The installation base 15 is installed at a midpoint in the height direction of the main frame 14, spanning both longitudinal sides.
[0034] Furthermore, a dog 128 is disposed on one end surface of the lifting base 102 in the width direction, facing the holding bracket 126. The dog 128 is formed, for example, in an arch shape, as shown in Figures 9 and 11, and is attached to the lifting base 102 by a mounting bracket 130. The dog 128 is formed in an arch shape with a convex portion 128a that protrudes outward at the center portion in the longitudinal direction. The center portion 128a of this dog 128 can abut against the cylindrical portions of the three limit switches 124a, 124b, and 124c, and when the center portion 128a abuts against the cylindrical portions of the three limit switches 124a, 124b, and 124c, the three limit switches 124a, 124b, and 124c are activated (signals are turned ON).
[0035] In this lifting mechanism, when the brush lifting motor 24 is driven, its rotational force is transmitted to the shafts of the four post guides 114 via the four chain wheels 120. As a result, the guide posts 114 become rotatable. When the guide posts 114 rotate, their threaded surfaces (external threaded surfaces) threadably engage with the threaded surfaces (internal threaded surfaces) of the screw holes in the lifting base 102. Because the threaded surfaces (external threaded surfaces) of the shafts of the guide posts 114 and the threaded surfaces (internal threaded surfaces) of the screw holes in the lifting base 102 form a threaded pair, the lifting base 102 can be raised and lowered vertically along the axial direction of the guide posts 114. In other words, the rotating brush 18 can be raised and lowered at a predetermined interval relative to the conveying surfaces of the conveyor belts 44, 46.
[0036] When the lifting base 102 is raised or lowered, the top limit switch 124a is a limit switch that determines the upper limit position of the lifting base 102, and the bottom limit switch 124c is a limit switch that determines the lower limit position of the lifting base 102. The second limit switch from the top, 124b, is a limit switch that confirms the mechanical starting point position when the automatic origin function is activated. The mechanical starting point position has the significance of a function that automatically measures the remaining amount of brush (i.e., a function that automatically measures the wear state) within the automatic origin function, and this functions as a fixed starting point position for automatically controlling the distance from a predetermined position (second limit switch 124b) to the completion of the automatic origin operation. The position of the brush tip of the rotating brush 18 on the conveying surface of the conveyor belts 44, 46 when the center portion 128a of the dog 128 abuts against this second limit switch 124b is set to the starting point position when the origin of the rotating brush is set, and therefore the position of the second limit switch 124b is fixed, and the height of the brush head of the rotating brush 18 is also fixed.
[0037] The brush head height when a new rotating brush 18 is installed is set as the reference "0 (zero)." When the automatic origin function is subsequently activated, the software calculates and displays the brush wear (remaining brush wear) based on the difference in how far the brush head of the rotating brush 18 has dropped relative to the reference brush head height of "0 (zero)" when a new rotating brush 18 is installed. In other words, the second limit switch 124b is set as the reference height, and the software measures, calculates, and displays the difference in the mechanical position of the brush head when the current rotating brush 18 is installed, from that point until the automatic origin is complete. This automatic brush wear measurement function makes it possible to visualize the remaining brush wear and replacement time. The automatic origin function starts from this second limit switch and measures the absolute distance until the operation is complete.
[0038] FIG. 12 is yet another perspective view of the main part (showing the swing mechanism and its periphery) inside the housing of the deburring machine according to the present invention, and FIG. 13 is a front view showing the main part of FIG. This swing mechanism includes a swing base 104. Two bearings 132, 134 are disposed on one end and the other end of the swing base 104 in the longitudinal direction and on both sides in the width direction. Furthermore, guide rails 136, 138 are disposed on both sides in the width direction of the lifting base 102 in the middle of the longitudinal direction. The two guide rails 136, 138 are attached at both ends in the longitudinal direction by L-shaped mounting brackets 140, 140. Two wheel units 142, 144 are disposed on the two guide rail units 136, 138, respectively. One pair of wheel sections 142, 142 are connected and fixed to both axial ends of an axle section 146, and the other pair of wheel sections 144, 144 are connected and fixed to both axial ends of an axle section 148.
[0039] 9, 11, and 12, a brush swing motor 26, such as a gear motor, is disposed on one longitudinal side of the lifting base 102. A drive shaft (not shown) of the brush swing motor 26 is connected to and fixed to timing pulleys 158, 160 via shafts 154, 156 rotatably supported by bearings 150, 152. A timing belt 162 is looped between one pair of timing pulleys 158, 158, and a timing belt 164 is looped between the other pair of timing pulleys 160, 160. The timing belts 162, 164 are connected and fixed to the oscillating base 104 via, for example, T-shaped fixing brackets 166, 168, respectively. The fixing brackets 166, 168 are arranged standing on both ends of the oscillating base 104 in the longitudinal middle of the base, and have clamping pieces 166a, 168a at their upper portions. The longitudinal middle of the timing belts 162, 164 are clamped by the clamping pieces 166a, 168a and fixed by fixing means such as screws. Therefore, by driving the brush swing motor 26, its rotational driving force is transmitted to the one and other timing pulleys 158, 160, driving the one and other timing pulleys 158, 160. Therefore, by the belt drive of the timing belts 162, 164, the swing base 104 can be displaced reciprocally along the longitudinal direction of the lifting base 102.
[0040] Furthermore, the swing mechanism includes, for example, five proximity sensors 172a, 172b, 172c, 172d, and 172e disposed near the swing base 104. The five proximity sensors 172a, 172b, 172c, 172d, and 172e are held at intervals on one end of the lifting base 102 in the width direction by five mounting brackets 170, e.g., L-shaped rectangles having a length. The five proximity sensors 172a, 172b, 172c, 172d, and 172e are disposed at the upper part of the five holding brackets 170 in the length direction. The five proximity sensors 172a, 172b, 172c, 172d, and 172e are fixed at intervals on one end of the lifting base 102 in the width direction by the five holding brackets 170. Each of the five holding brackets 170 has one longitudinal end (lower end) attached to the lifting base 102, for example, by screws, and cylindrical proximity sensors 172a, 172b, 172c, 172d, and 172e attached to the other longitudinal end (upper end). Each of the five proximity sensors 172a, 172b, 172c, 172d, and 172e is disposed such that its tip end (detection side) faces a moving path along which a proximity sensor dog 178 (described later) of the oscillating base 104 passes and moves. In this case, the proximity sensors 172a and 172b located on both sides of the oscillating base 104 in the longitudinal direction serve as proximity sensors for confirming the stopping position of the oscillating base 104, the proximity sensor 172c serves as a proximity sensor for confirming the central position of the oscillating base 104 in the longitudinal direction, and the proximity sensors 172d and 172e serve as proximity sensors for confirming the deceleration position when decelerating the oscillating base 104.
[0041] Meanwhile, a proximity sensor dog 178 is disposed on one widthwise end of the oscillating base 104 and in the center in the longitudinal direction. This dog 178 is formed, for example, from a T-shaped metal plate, as shown in Figures 11 and 12, and is attached by a fixing means such as a screw to the upper surfaces of the clamping pieces 166a, 168a of the fixed brackets 166, 168 that fix the timing belts 162, 164. In this case, when the oscillating base 104 reciprocates in its longitudinal direction, that is, when it oscillates, the dog 178 sequentially passes in front of the five proximity sensors 172a, 172b, 172c, 172d, and 172e. At this time, the five proximity sensors 172a, 172b, 172c, 172d, and 172e each sequentially detect the proximity sensor dog 178 at their tip ends (detection sides), and the five proximity sensors 172a, 172b, 172c, 172d, and 172e sequentially activate (signals turn ON).
[0042] FIG. 14 is a perspective view of a rotary brush applied to a deburring machine according to the present invention, and FIG. 15 is an enlarged cross-sectional view taken along line AA in FIG. The rotary brush 18 has a number of cylindrical abrasive cloths 198 and includes a brush body 190. A cylindrical foam core 192 is disposed in the center of the brush body 190, and a foam cap 194 of the foam core 192 is disposed on one axial end face (upper end face) of the brush body 190. In addition, a tag 196 is embedded between the brush body 190 and the foam cap 194 so as not to be visible from the outside. The tag 196 stores data such as the specifications of the rotating brush 18 in which the tag 196 is embedded (angle R corresponding to the grinding force corresponding to the grit size, material, and type of abrasive cloth of the rotating brush 18), the axial length (bristle length) of the brush body 190, the brush origin position, and processing conditions (number of rotations, number of revolutions, swing speed, etc. of the rotating brush 18 adapted to the predetermined specifications). A reader (reader) that reads the data from this tag 196 is attached to the main body of the deburring machine 10. The data read by the reader (reader) is sent to the control unit via a LAN cable and a repeater, and is processed appropriately by control software.
[0043] Figure 16 is an explanatory diagram of setting the origin position of the rotating brush of the deburring machine of the present invention (setting the origin of the brush), where (A) of Figure 16 is an explanatory diagram showing the main parts, and (B) of Figure 16 is an explanatory diagram showing other main parts. During deburring of the object (workpiece) to be processed by this deburring machine 10, the rotating brush 18 rotates at high speed, the abrasive cloth 198 is stretched taut, and the object (workpiece) to be processed is polished by the abrasive cloth 198 approaching the conveying surfaces of the conveying belts 44, 46 of the conveying means 10. Therefore, when setting the brush origin, first, to create this polishing state, three to five abrasive cloths 198 of the rotating brush 18 are gripped, for example, at positions vertically downward from the center of the core of the rotating brush 18 relative to the conveying surface of the conveyor belt 44, 46. The rotating brush 18 is then lowered by the lifting mechanism until the tip of the abrasive cloth 198 vertically contacts the conveying surface of the conveyor belt 44, 46. At this time, the current elevation position of the rotating brush 18 is reset to "0 (zero)." The control unit then controls the rotating brush 18 to automatically stop at a position where it has descended, for example, 3 mm. That is, when the tip of the abrasive cloth 198 of the rotating brush 18 contacts the conveying surface of the conveyor belt 44, 46 at the 3 mm contact point 200, the setting of the origin of the rotating brush 18 is completed. 3 mm is the amount of contact between the rotating brush 18 and the workpiece.
[0044] This deburring machine 10 has an adsorption structure including a sub-vacuum chamber (groove portion 76 of the sliding plate) as described in particular in Figures 4, 5A, 5B(B), 5B(C), 18A(A), 18A(B), etc., so that even small processing objects (workpieces) that are difficult to deburr can be reliably and stably adsorbed and held on the conveying surfaces of the conveyor belts 44, 46.
[0045] 7, 8A, 8B, 8C, etc., the spindle shaft branching mechanism 84 in the rotating means of the rotary brush 18 includes a non-contact transmission mechanism 90, so that the vertical shaft 86 and the orthogonal shaft 90 that transmit the rotational drive force of the brush rotation motor 20 are not in contact with each other, which contributes to the maintenance-free operation of each component of the spindle shaft branching mechanism 84. In this case, there is no problem of wear of components due to contact between them, as compared to drive transmission using a gear train such as a differential gear, or a pulley, coupling, belt, etc., and therefore there is a low risk of breakdown and running costs, including repair costs, can be reduced. Furthermore, in this non-contact transmission mechanism 90, no contact slippage occurs, making it possible to perform precise speed control, and no heat is generated during the transmission of rotational force between the driving rotating parts 92a, 92b and the driven rotating part 94.Moreover, complex control can also be performed, such as periodically increasing and decreasing the rotational speed of the driving rotating parts 92a, 92b and the driven rotating part 94.
[0046] Furthermore, this deburring machine 10 has a swing mechanism including a swing base 104, a brush swing motor 26, etc., as described in particular in Figures 11, 12, 13, etc., so that when deburring a large object to be processed (workpiece), the processing area can be expanded, and the amount of deburring at both ends of the large object to be processed (workpiece) can be improved when viewed in the width direction of the conveying belts 44, 46.
[0047] Furthermore, in this deburring machine 10, the belt conveyor of the transport means 16 is configured as a dual conveyor type, as shown in Figures 3, 6, 7, etc., which broadens the scope of operations, such as simultaneous processing of different types of processing objects (workpieces), single-person work, and processing of both sides of the processing object (workpiece), thereby reducing the amount of work required. In this case, two rows of conveyor belts 44, 46 are arranged, and the same work as currently possible can be performed by controlling the belt conveyors of both rows of conveyor belts 44, 46 in the direction that the workpieces to be processed move toward the discharge side. By leaving one of the two rows idle, the suction and holding power of one of the conveyor belts 44 or 46 is doubled, allowing for more stable suction and holding of small workpieces to be transported.
[0048] Furthermore, if the first row of conveyor belts 44 are controlled to move in the forward direction and the second row of conveyor belts 46 are controlled to move in the opposite direction (reverse direction), and a U-turn conveyor (curved conveyor) is provided on the unloading side, it becomes possible to deburr the workpieces to be processed even when they are reversing, following the flow of the conveyor belts 44, 46, and to receive the workpieces to be processed on the loading side. Furthermore, by attaching a reversing mechanism to a U-turn conveyor (curved conveyor), it is possible to deburr both sides of the object to be processed (workpiece) and then receive the object to be processed (workpiece) on the carry-in side.It is also possible to divide these tasks by programming them using industrial robots, AI (artificial intelligence), etc.
[0049] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes changes and additions that do not deviate from the gist of the present invention. [Explanation of symbols]
[0050] 10 Deburring machine 12 Housing 14 Main frame 15 Installation base 16 Means of transport 18 Rotating Brush 20 Brush rotation motor 22 Brush turning motor 24 Brush lift motor 26 Brush oscillating motor 28 Decompression Chamber 30 Pressure reducing device 32 Intake duct pipe 34 Exhaust duct pipe 36 Dust collector 38 Conveyor Frame 40 Conveyor drive roller 42 Conveyor driven roller 44,46 Conveyor belt 48 Suction holes on conveyor belt 50 Conveyor drive motor 52 Plate 54 frames 56 Partition 58 Through Hole 60,62 Air intake 64,66 Side duct 68 Top plate (top plate part) 70 Top panel ventilation holes 72 Slide 72A Slide plate body 74 Suction hole of slide plate 76 Slide plate groove (sub-vacuum chamber) 78 Recess 80 Another recess 82 Brush rotation means 84 Spindle axis branching mechanism 86 vertical axis 87 Cylindrical housing part 88 Orthogonal Axis 90 Non-contact transmission mechanism 91 Drum-shaped housing part 92a,92b Main rotating part 94 Driven rotating part (large diameter rotating part / small diameter rotating part) 96 First Magnet 98 Second Magnet 100 Gap 102 Lifting base 104 Swinging Base 106,108 Pulley 110 Timing pulley 112 Timing belt 114 Guidepost 116 screw holes 118 support frame 120 chainwheel 122 Chain Belt 124a, 124b, 124c limit switches 126 Retaining bracket 128 Dog 128a Center of the Dog 130 Mounting Bracket 132,134 Bearing section 136,138 Guide rail section 140 Mounting Bracket 142,144 Wheel section 146,148 Axle 150,152 Bearing section 154,156 Shaft 158,160 Timing pulley 162,164 Timing belt 166,168 Fixing bracket 170 Proximity Sensor Mounting Bracket 172a, 172b Proximity sensors for checking one and the other stop position in the longitudinal direction of the swing base 174a, 174b Proximity sensors for checking deceleration position for deceleration 176 Proximity sensor for checking the longitudinal center position of the swing base 178 Proximity sensor dog 178A Dog protrusion 180 Dog mounting bracket
Claims
1. A conveying means for holding and conveying the object to be processed (workpiece) in a predetermined direction; one or more rotating brushes disposed on the conveying means substantially parallel to the conveying path of the conveying means, which come into contact with the object to be treated to perform the deburring treatment; a brush rotating means for rotating the rotary brush; a deburring machine including a decompression chamber disposed below the conveying path, a decompression device for decompressing an internal space of the decompression chamber to a vacuum pressure, and an adsorption means for adsorbing and holding the processing object on the conveying path, a sub-vacuum chamber communicating with the decompression chamber is disposed at a portion of the conveying means that abuts against the conveying path, and the sub-vacuum chamber controls the inflow of atmospheric air into the decompression chamber and supports the vacuum pressure of the decompression chamber.
2. the transport means includes a belt conveyor having an endless annular transport belt with a plurality of suction holes formed therein that penetrate from the front surface to the back surface, and which transports the object by suction and holding it on the transport surface of the transport belt; The decompression chamber includes a decompression chamber body having a plurality of vent holes on a top surface thereof, 2. The deburring machine according to claim 1, wherein the plurality of suction holes in the conveyor belt and the ventilation holes in the top surface portion are communicated with each other via the sub-vacuum chamber.
3. a negative pressure control member disposed on a top surface of the decompression chamber so as to contact the conveyor belt, the negative pressure control member controlling the inflow of air into the decompression chamber through an air hole in the top surface, and controlling the negative pressure in the decompression chamber; the negative pressure control member includes a sliding plate having a length direction and formed of a resin material; The sliding board is Slide plate body, an intake hole penetrating the sliding plate body in the thickness direction and communicating with the ventilation hole of the top surface portion; a communication passage extending from one end to the other end in the length direction of the sliding plate body at an interval in the width direction of the sliding plate body and on both sides in the radial direction of the suction hole, the communication passage enabling communication between the suction hole and the air vent hole; The deburring machine according to claim 2 , wherein the sub-vacuum chamber includes the communication passage.
4. 4. The deburring machine according to claim 3, wherein the communication passage includes a groove portion extending in the thickness direction of the sliding plate body, one end of the groove portion being open to the upper surface of the sliding plate body and the other end being connected to the inner surface side of the air vent hole.
5. 5. The deburring machine according to claim 4, wherein the sliding plate body further includes, in a plan view, another communicating passage extending parallel to the communicating passage in an intermediate portion between one communicating passage and the other communicating passage in the radial direction of the suction hole, and the another communicating passage includes a recess passing through the central portion of the suction hole in a plan view and extending from one end to the other end in the longitudinal direction of the sliding plate body.
6. 4. The deburring machine according to claim 3, wherein the plurality of suction holes are arranged at intervals in the width direction of the sliding plate body, and another recess is arranged between the suction holes, and the another recess reduces frictional resistance between the conveying belt and the sliding plate.
7. The conveying means is Brush rotation motor, a vertical shaft that rotates by the rotational driving force of the brush rotation motor; a plurality of orthogonal axes arranged at intervals in a circumferential direction of the vertical axis and arranged in a direction orthogonal to the vertical axis; a non-contact transmission mechanism that transmits the rotation of the vertical axis to the orthogonal axis in a non-contact manner; The non-contact transmission mechanism includes: a driving rotation portion connected to one end side of the vertical shaft in the axial direction; a plurality of driven rotating parts connected to one end side of the orthogonal shaft in the axial direction; a plurality of first magnets arranged on a main surface of the main rotor near the outer periphery so that N poles and S poles alternate; a plurality of second magnets arranged on a peripheral end surface of the driven rotating portion so that N poles and S poles alternate; The deburring machine according to any one of claims 1 to 6, characterized in that the plurality of first magnets and the plurality of second magnets are arranged to face each other in a non-contact state with a gap therebetween.
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