KR20180087637A - Automatic abrasion machine - Google Patents

Abstract

The present invention relates to an automatic grinder with improved productivity. According to the present invention, the automatic grinder (100) comprises: a support frame (110); a lower rail (121); a lower guide (123) mounted on the lower rail (12) to be transferred; a lower rack gear (125) arranged on the top of the support frame (110) in parallel to the lower rail (121); a lower frame (130) fixed to the lower guider (123); a lower pinion (141) engaged with the lower rack gear (125); a lower servo motor (143) fixed to the lower frame (130); an upper rail (145) mounted on both sides of the top of the lower frame (130) to be perpendicular to the lower rail (121); an upper guider (147) mounted on the upper rail (145) to be transferred; an upper rack gear (149) disposed on the top of the lower frame (130) in parallel to the upper rail (145); an upper frame (150) fixed to the upper guider (147); an upper pinion (161) engaged with the upper rack gear (149); an upper servo motor (163) fixed to the upper frame (150); and a grinding part (170) fixed to the upper frame (150) to penetrate the lower and support frames (130, 110) so as to grind a material (M) to be ground.

Description

{AUTOMATIC ABRASION MACHINE}

The present invention relates to an automatic polishing machine, and more particularly, to an automatic polishing machine capable of applying a pressure to a workpiece at a uniform pressure even when a grinding stone is consumed when polishing an upper surface of a sidewalk block, To an automatic polishing machine.

1 is a side view showing an automatic polishing machine according to the background art, and the construction of an automatic polishing machine according to the background art will be described as follows.

And a lower rail 20 is arranged on both sides of the upper surface of the support frame 10 in the front and rear directions (the direction of conveyance of the workpiece) And a lower frame 30 which is seated on the rail 20 and is transported forward and backward. Further, an upper rail 40 arranged to be perpendicular to the lower rail 20 is formed on the upper surface of the upper frame 30. Further, an upper frame (50) is mounted on the upper rail (40) and is transported to left and right rooms. The grinding unit 60 is mounted on the upper frame 50 and is mounted to move up and down. The grinding unit 60 is driven to rotate the grinding stone 63. The grinding unit 60 is configured to rotate the grinding stone 63 by driving the motor 61 and is configured to be able to move up and down with an air cylinder 65 mounted thereon. The plurality of polishing units 60 are arranged to cooperate to polish a workpiece. The lower frame 30 and the upper frame 50 are configured to be movable by the lower hydraulic cylinder 70 and the upper hydraulic cylinder, respectively.

Hereinafter, an operation example of the automatic polishing machine 1 will be described.

The conveyor (C) is provided with a conveyor (C) disposed below the support frame (10), and a plate-like stone or a workpiece, which is a sidewalk block, is conveyed through the conveyor (C). The grinding unit 60 grinds the upper surface of the workpiece while rotating in a state where the grinding stone 63 is lowered by the operation of the air cylinder 65. At this time, the polishing unit 60 is polished by drawing a quadrangular or circular locus by the lower hydraulic cylinder 70 and the upper hydraulic cylinder so that the portion of the workpiece corresponding to the portion between the grinding stones 63 can be easily polished It works.

The automatic polishing machine 1 according to the above construction and operation has the following problems.

First, when the grinding stone 63 is lowered, the air cylinder 65 continuously compresses the grinding stone 63. Accordingly, there has been a problem that stress is accumulated in the grinding stone 63 or the workpiece due to the compression, and cracks are generated or broken.

Secondly, as the abrasive grains 63 are worn out, the abrasive efficiency is lowered, so that the abrasive grains 63 are exchanged from time to time.

Third, since the lower hydraulic cylinder 70 and the upper hydraulic cylinder used for moving the lower frame 30 and the upper frame 50 are difficult to precisely adjust the amount of movement, the trajectory of the grinding stone 63 can be precisely adjusted There was no problem. That is, in order to uniformly polish the entire surface of the workpiece, it is necessary to precisely adjust the amount of movement, but in the background art, there is a problem in that it is difficult to precisely manipulate it due to the nature of the hydraulic pressure.

Fourth, since the lower hydraulic cylinder 70 and the upper hydraulic cylinder require complicated hydraulic hoses, hydraulic tanks, and various hydraulic parts, the structure is complicated and bulky, which makes it difficult to design compact.

Fifth, there is a problem that the hydraulic oil is leaked through the hydraulic hose or the hydraulic part connected to the lower hydraulic cylinder 70 and the upper hydraulic cylinder to contaminate the workpiece.

Korean Utility Model Registration No. 20-0406859 (2006

The automatic polishing machine according to the present invention attempts to solve the following problems.

First, in a state where the grinding stone is lowered, the air cylinder continuously compresses the grinding stone. Accordingly, it is aimed to solve the problem that stress is accumulated in the grinding stone or the workpiece by the compression so that cracks are generated or broken.

Second, as the abrasive grains are worn out, the abrasive efficiency is lowered, and the abrasive grains are exchanged at any time, thereby reducing the production efficiency.

Third, the lower hydraulic cylinder and the upper hydraulic cylinder used for moving the lower frame and the upper frame are difficult to precisely adjust the amount of movement, and thus the trajectory of the grinding stone can not be precisely adjusted.

Fourth, the lower hydraulic cylinder and the upper hydraulic cylinder require complicated hydraulic hoses, hydraulic tanks, and various hydraulic parts, so that a complicated structure and a bulky structure are required to solve the problem that a compact design is difficult.

Fifth, a problem that the hydraulic oil leaks through the hydraulic hose or the hydraulic part connected to the lower hydraulic cylinder and the upper hydraulic cylinder to pollute the workpiece is solved.

The automatic polishing machine according to the present invention is configured as follows to solve the above problems.

A lower rail mounted on both sides of the upper end of the support frame such that the longitudinal direction thereof is directed to the front and rear sides, and a lower guider mounted on the lower rail to be conveyed, A lower rack fixed to the lower frame, a lower rack fixed to the lower frame, a lower rack fixed to the lower frame, a lower rack fixed to the lower frame, An upper rail mounted on both sides of an upper end of the lower frame so as to be orthogonal to the lower rail and an upper guider mounted on the upper rail to be conveyed, An upper frame fixed to the upper guider, and an upper frame fixed to the upper frame, An upper servo motor fixed to the upper frame to supply a rotational force to the upper pinion; and a polishing unit fixed to the upper frame and passing through the lower frame and the support frame .

The polishing unit may include a tubular outer housing fixed to the upper frame so as to be vertically penetrated into the upper and lower chambers, an inner housing which is accommodated below the outer housing and moves up and down, An air cylinder fixed to the outer surface of the outer housing and connected to the housing flange and inserted into the outer housing and rotated to be rotated; A serration shaft inserted into the serration pipe; a drive shaft connected to a lower portion of the serration shaft and extending downwardly of the inner housing through the inner housing; An upper flange protruding sideways from the lower end of the drive shaft, A lower flange protruding laterally from the receiving tube; a spiral shaft fixed to the lower flange and passing through the upper flange; and an upper shaft fixed to the spiral shaft, A compression spring disposed between the upper flange and the lower flange, and a servo motor fixed to the upper frame to transmit power to the serration pipe, .

A load cell attached to the lower surface of the upper flange and closely attached to the upper end of the compression spring; and a load cell connected to the load cell, And to stop the descent of the rod when a specified pressure is sensed.

The present invention by the above-mentioned solution can exhibit the following effects.

First, because the buffer spring can be buffered by the compression springs, it is possible to prevent a phenomenon that mutual stress is accumulated and damaged in a state where the grinding stone is in close contact with the workpiece.

Second, since the rod of the air cylinder can be automatically lowered through the load cell and the control unit as the grinding stone is worn out, the number of times of replacing the grinding stone can be reduced as in the background art, so that productivity can be improved.

Third, by a gear drive system in which the lower servo motor and the upper servo motor can adjust the rotation angle precisely, the lower pinion is engaged with the lower rack gear, and the upper pinion is meshed with the upper rack gear, The moving distance can be adjusted more precisely than the background technology, so that the locus can be adjusted to match the size of the workpiece.

Fourth, the structure can be simplified as compared with the hydraulic driving method based on the background art. That is, since the structure is simpler than the structure of the hydraulic hose hydraulic tank, the hydraulic cylinder, and various hydraulic parts as in the background technology, a compact design can be achieved.

Fifth, as in the background art, there is no phenomenon that the hydraulic oil leaks and contaminates the workpiece, so that the workpiece can be cleaned.

1 is a side view showing an automatic polishing machine according to the background art;
2 is a side view showing an automatic polishing machine according to the present invention;
3 is a cross-sectional view taken along the line F-F 'in Fig.
4 is a plan view showing the automatic polishing machine according to the present invention as viewed from above.
5 is a partial sectional view showing a state in which a grinding stone is lowered in a grinding part mounted on an automatic grinding machine according to the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 2 is a side view showing an automatic polishing machine according to the present invention, FIG. 3 is a sectional view taken along line F-F 'of FIG. 2, FIG. 4 is a plan view showing an automatic polishing machine according to the present invention, Sectional view showing a state in which the grinding stone is lowered in the grinding portion mounted on the automatic polishing machine according to the present invention.

The automatic polishing machine 100 according to the present invention can prevent damage to not only the workpiece M but also the grinding stone 223 by buffering the workpiece M so that the grinding stone 223 is worn So that the locus of the grinding stone 223 can be formed by a gear drive system other than the hydraulic pressure. Thus, a compact design can be realized, and a phenomenon that the workpiece M is contaminated by the operating oil And the like.

To this end, the present invention is configured as follows.

Shaped support frame 110 which is mounted on the bottom surface and supports the support frame 110. It is preferable that the legs are connected to the bottom of the frame.

The lower rail 121 and the lower rail 121 are mounted on the upper and lower sides of the upper and lower sides of the support frame 110 such that the longitudinal direction of the upper and lower sides of the support frame 110 faces forward and backward (the direction in which the workpiece moves forward in the present invention) So that the lower guider 123 is formed. A lower rack gear 125 is disposed on the upper end of the support frame 110 so as to be parallel to the lower rail 121. That is, the lower rack gear 125 and the lower rail 121 are formed on the upper left side of the support frame 110, and equally mounted on the right side. Further, a lower frame 130 of a rectangular frame shape fixed to the lower guider 123 is formed. A lower pinion 141 is mounted on the lower frame 130 and meshed with the lower rack gear 125. The lower pinion 141 is fixed to the lower frame 130 to supply rotational force to the lower pinion 141, A lower servomotor 143 is constructed. Therefore, the lower frame 130 can be moved forward and backward by the normal and reverse rotation of the lower servomotor 143. [

An upper rail 145 mounted at right angles to the lower rail 121 and an upper guider 147 mounted and transported to the upper rail 145 are provided on both upper ends of the upper frame 130 . An upper rack gear 149 is disposed on the upper end of the lower frame 130 in parallel with the upper rail 145. That is, the upper rail 145 and the upper rack gear 149 are formed on the upper front side of the lower frame 130 and equally mounted on the rear side. Further, an upper frame 150 fixed to the upper guider 147 is formed, and a support plate 155 is disposed at the center of the upper frame 150 as a rectangular frame. An upper pinion 161 is mounted on the upper frame 150 to be engaged with the upper rack gear 149 and is fixed to the upper frame 150 to supply rotational force to the upper pinion 161. The upper servo motor 163 is constituted. Therefore, the upper frame 150 can be moved to the left and right sides by the normal / reverse rotation of the upper servo motor 163.

The workpiece M is passed through the support frame 155 of the upper frame 150 and passes through the lower frame 130 and the support frame 110, The polishing portion 170 is formed.

The construction of the polishing unit 170 will be described below.

A tubular outer housing 171 is fixed to the upper frame 150 so as to be perpendicular to the upper frame 150, and is fixed through the support plate 155. The inner housing 173 is received in the lower portion of the outer housing 171 and is vertically moved upward and downward. The inner housing 173 protrudes from the lower end of the inner housing 173, A housing flange 175 is disposed. An air cylinder 177 fixed to the outer surface of the outer housing 171 and having a rod 179 connected to the housing flange 175 is formed. A serration pipe 181 inserted into the outer housing 171 and rotatably mounted thereon is formed with a key groove into which an inner key of the serration shaft 183 to be described later is inserted . In addition, a serration shaft 183 inserted in the serration pipe 181 is constituted. A driving shaft 185 connected to the lower portion of the serration shaft 183 and extending downwardly of the inner housing 173 through the inner housing 173 is formed.

An upper flange 187 protruding laterally from the lower end of the drive shaft 185 is formed and an insert shaft 189 extending downward from the lower end of the drive shaft 185 is formed. A receiving tube 191 for receiving the insert shaft 189 is formed and a lower flange 193 protruding laterally from the receiving tube 191 is formed. The nut 181 is fixed to the lower flange 193 and has a spiral shaft 195 passing through the upper flange 187. The spiral shaft 195 is fastened to the upper surface of the upper flange 187, (197). The spiral shaft 195 is received and a compression spring 199 is disposed between the upper flange 187 and the lower flange 193.

The receiving tube 191 is penetrated and a base plate 198 is fixed to the lower surface of the lower flange 193. The receiving tube 191 is penetrated and the base plate 198 is bolted The grinding stone 223 to be fixed is constituted.

A load cell 211 attached to a lower surface of the upper flange 187 and closely attached to the upper end of the compression spring 199 is formed in a ring shape in which the spiral shaft 195 is inserted. And controls the rod 179 of the air cylinder 177 to descend and stop the descent of the rod 179 when a predetermined pressure is sensed.

Further, the air cylinder 177 is configured to adjust the descending length of the rod 179 to be constant by mounting a pilot check valve.

The servo motor 201 is fixed to the upper frame 150 to transmit power to the serration pipe 181. For example, the belt pulley 203 is fixed to the serration pipe 181, And the servo motor 201 also includes a belt pulley 205. A belt 207 is attached to each of the belt pulleys 203 and 205 to transmit power.

The polishing unit 170 may be arranged as a plurality of rows and columns as an example. At this time, the belt pulley 203 is fixed to each of the serration pipes 181 and connected to each other by a belt 207. The belt pulley 203 of the serration pipe 181 is connected to the belt pulley 205 of the servo motor 201 by a belt 207.

Hereinafter, an operation example of the automatic polishing machine 100 according to the present invention will be described.

A workpiece M such as a plate stone or a sidewalk block is moved through the conveyor C in a state where a conveyor C arranged forward and backward is installed on the lower part of the support frame 110. At this time, the serration pipe 181 is rotated by the servo motor 201. Then, a rotational force is transmitted to the grinding stone 223 through the serration shaft 183 and the drive shaft 185. The rod 179 is lowered by the air cylinder 177 to lower the inner housing 173 so that the grinding stone 223 polishes the upper surface of the workpiece M. At this time, the serration shaft 183 rotates while being guided by the serration pipe 181 and moves downward. At the same time, the lower servomotor 143 and the upper servomotor 163 are operated so that the lower frame 130 and the upper frame 150 are moved so that the grinding stone 223 forms a trajectory in a square or circular shape . This trajectory can be variously adjusted by controlling the lower servo motor 143 and the upper servo motor 163. Therefore, the upper surface of the workpiece M can be evenly polished.

Alternatively, only a part of the plurality of polishing units 170 may be operated by descending the grinding stone 223, or may be grinded without moving the locus.

Some of the grinding stones 223 may be provided with concaves and convexes on the lower surface thereof to form a rough surface on the surface of the workpiece M at the same time as polishing. That is, it is possible to produce a new image by uniformly polishing the upper surface and then forming the rough surface, and such a rough surface can exhibit the slip function to facilitate the walking of the pedestrian.

When the upper surface of the workpiece M is lowered by the lowering of the grinding stone 223, the rod 179 is lowered by a predetermined length and the grinding stone 223 is polished while the upper surface of the workpiece M is compressed. At this time, the lower flange 193 is repeatedly lifted and lowered, and the insert shaft 189 functions to guide up and down the lower flange 193, and the compression spring 199 functions as a buffer. Therefore, a compressive force acting at the time of grinding can be accumulated in the grinding stone 223 and the workpiece M so that cracks are generated or broken.

Further, when the lower surface of the grinding stone 223 is worn, the compressive force acting on the load cell 211 becomes a specified value or less. Then, the control unit senses this and controls the air cylinder 177 so that the rod 179 descends further. That is, air is further injected to lower the rod 179. At this time, the control unit stops the air injection and stops the rod 179, that is, the grinding stone 223, from descending if the compressive force exceeding the predetermined value is detected through the load cell 211.

As described above, according to the present invention, since the buffering can be performed by the compression spring 199, mutual stress can be prevented from being accumulated and damaged in a state where the grinding stone 223 is in close contact with the workpiece M.

In addition, since the load 179 of the air cylinder 177 can be automatically lowered through the load cell 211 and the control unit as the grinding stone 223 is worn, the number of times of replacement of the grinding stone 223 can be reduced Productivity can be improved.

The lower pinion 141 is engaged with the lower rack gear 125 and the upper pinion 161 is engaged with the lower rack gear 125. The lower pinion 141 is coupled to the lower rack gear 125, There is an advantage that the moving distance of the lower frame 130 and the upper frame 150 can be adjusted more precisely than the background technique by a gear driving method that is engaged with the gear 149. [ Therefore, the locus can be adjusted so as to conform to the size of the workpiece M. In particular, in this case, the structure can be simplified as compared with the hydraulic driving method based on the background technology. In other words, the structure is simpler than the structure of the hydraulic hose hydraulic tank, the hydraulic cylinder, and various hydraulic parts as in the background technology, so that a compact design is possible. And there is no phenomenon that the working oil leaks and contaminates the workpiece (M) as in the background art.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but are intended to be illustrative, and thus the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Automatic polishing machine 110: Support frame
121: Lower rail 123: Lower guider
125: Lower rack gear 130: Lower frame
141: lower pinion 143: lower servo motor
145: upper rail 147: upper guider
149: upper rack gear 150: upper frame
155: support plate 161: upper pinion
163: upper servo motor 170: polishing section
171: outer housing 173: inner housing
175: Housing flange 177: Air cylinder
179: Load 181: Serration pipe
183: Serration shaft 185: Driving shaft
187: upper flange 189: insert shaft
191: receiving tube 193: bottom flange
195: helical axis 197: nut
198: base plate 199: compression spring
201: Servo motor 203: Belt pulley
205: belt pulley 207: belt
211: load cell 223: grindstone

Claims (3)

A support frame 110 which is seated on the bottom surface and supports the support frame 110,
A lower rail 121 mounted on both sides of the upper end of the support frame 110 so as to be longitudinally oriented and a lower guider 123 mounted on the lower rail 121 to be conveyed,
A lower rack gear 125 disposed at the upper end of the support frame 110 and disposed in parallel with the lower rail 121,
A lower frame 130 fixed to the lower guider 123,
A lower pinion 141 mounted on the lower frame 130 and engaged with the lower rack gear 125,
A lower servo motor 143 fixed to the lower frame 130 to supply rotational force to the lower pinion 141,
An upper rail 145 mounted on both upper ends of the lower frame 130 so as to be orthogonal to the lower rail 121 and an upper guider 147 mounted on the upper rail 145 to be conveyed,
An upper rack gear 149 disposed on the upper end of the lower frame 130 in parallel with the upper rail 145,
An upper frame 150 fixed to the upper guider 147,
An upper pinion 161 mounted on the upper frame 150 and engaged with the upper rack gear 149,
An upper servo motor 163 fixed to the upper frame 150 to supply rotational force to the upper pinion 161,
And a polishing unit (170) fixed to the upper frame (150) to polish the workpiece (M) through the lower frame (130) and the support frame (110). The method according to claim 1,
The polishing unit 170 includes:
A tubular outer housing 171 which is fixed to the upper frame 150 so as to be perpendicular to the upper frame 150,
An inner housing 173 which is accommodated below the outer housing 171 and moves up and down,
A housing flange 175 protruding from the lower end of the inner housing 173 and positioned below the outer housing 171,
An air cylinder 177 fixed to the outer surface of the outer housing 171 and having a rod 179 connected to the housing flange 175,
A serration pipe 181 inserted into the outer housing 171 so as to be rotated,
A serration shaft 183 inserted into the serration pipe 181,
A drive shaft 185 connected to a lower portion of the serration shaft 183 and extending downwardly of the inner housing 173 through the inner housing 173,
An upper flange 187 projecting sideways from the lower end of the drive shaft 185,
An insert shaft 189 extending downward from the lower end of the drive shaft 185,
A receiving tube 191 for receiving the insert shaft 189,
A lower flange 193 protruding laterally from the receiving pipe 191,
A spiral shaft 195 fixed to the lower flange 193 and penetrating the upper flange 187,
A nut 197 fastened to the spiral shaft 195 and closely attached to the upper surface of the upper flange 187,
A compression spring 199 that receives the spiral shaft 195 and is disposed between the upper flange 187 and the lower flange 193,
And a servo motor (201) fixed to the upper frame (150) to transmit power to the serration pipe (181). 3. The method of claim 2,
A load cell 211 attached to a lower surface of the upper flange 187 and closely attached to the upper end of the compression spring 199,
And a control unit connected to the load cell 211 to control the load 179 of the air cylinder 177 to descend and stop the falling of the rod 179 when a predetermined pressure is sensed Wherein the first and second grinding wheels are rotatable.

Images