grinder

Abstract

To provide a grinder for detecting machine vision.SOLUTION: The grinder comprises a grinding unit 2 slidably connected to a linear rail 4 of an upstanding column 1, a fitting panel 5 slidably connected to the linear rail 4, and a connection device 6 for connecting the fitting panel 5 to the grinding unit 2, and further comprises a camera unit 7 and a light source unit 8 which are fixed to the fitting panel 5. When a push rod 62 is standing still with respect to a housing 61, the grinding unit 2 is driven to make the connection device 6 move up and down the fitting panel 5 and the camera unit 7 synchronously. When a second power source 63 drives the push rod 62 so that the rod expands and contracts with respect to the housing 61, the fitting panel 5 is driven by the expansion and contraction of the push rod 62 to move up and down with respect to the grinding unit 2 and the camera unit 7 is driven to move up and down independently with respect to the griding unit 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to grinders, and more particularly to grinders that provide machine vision detection for grinding wheels. [Background technology]

[0002] In a typical upright grinder, the grinding wheel moves up and down relative to the workpiece to perform machining. To facilitate online detection of the grinding wheel, machine vision detection of the grinding wheel is performed on the grinder, using an industrial camera to collect images of the grinding wheel, and then using image analysis algorithms to determine whether the workpiece is being machined. Summary of the Invention [Problem to be solved by the invention]

[0003] In conventional machine vision detection methods, the industrial camera and the grinding wheel move up and down in perfect synchronization, but dust and debris generated during processing easily accumulate on the industrial camera. Alternatively, the industrial camera and the grinding wheel are completely independent, so the industrial camera and the grinding wheel move up and down along their own linear rails. However, this method requires ensuring that the linear rails of the industrial camera and the linear rails of the grinding wheel are sufficiently parallel; if they are not parallel, the industrial camera will not be able to accurately focus on the grinding wheel at a certain height, reducing the accuracy of image collection of the grinding wheel. [Means for solving the problem]

[0004] In contrast to the background art, the grinding unit and camera unit of the grinder of the present invention share a linear rail, and maintain sufficient parallelism while the grinding unit and camera unit move up and down independently relative to each other, with the distance between the detected part of the grinding unit and the camera unit being the focal length of the camera unit throughout. Simply aligning the detected part of the grinding unit with the camera unit allows the camera unit to collect images. This eliminates the need for a zoom lens and corresponding algorithm, saving costs and improving reliability. [Effects of the Invention]

[0005] As described above, the present invention has the following advantages. The grinding unit and the camera unit are connected to the same linear rail by an extension plate and a mounting panel, respectively, ensuring that the grinding unit and the camera unit move up and down parallel to each other. The extension plate and the mounting panel are connected to an extendable connecting device, which allows them to be driven toward or away from each other, thereby allowing the grinding unit and the camera unit to move toward or away from each other. When the grinding unit is processing a workpiece, the push rod mechanism raises the mounting panel relative to the extension plate, allowing the camera unit to move away from the grinding unit to avoid dust and debris. After the grinding unit has completed processing, the push rod mechanism lowers the mounting panel relative to the extension plate, allowing the camera unit to lower the grinding unit and the workpiece to a certain height, respectively. The amount of wear on the grinding unit and the size of the workpiece are measured, respectively, to determine whether the workpiece has been processed. If not, the amount of wear on the grinding unit is combined, the pitch of the grinding unit and the position of the workpiece are adjusted, and the workpiece is subjected to secondary processing. The present invention can also detect whether the grinding unit has been corrected. When the grinding unit is corrected, the camera unit can be moved away from the grinding unit, and after the correction is completed, the camera unit can be moved to a certain height of the grinding unit to detect whether the grinding unit has been corrected. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a schematic diagram showing an example of a grinder member in which the grinder according to the first embodiment of the present invention is used; [Figure 2] 1 is a schematic diagram showing a grinding unit and a mounting panel of a grinder according to an embodiment of the present invention, which are connected to the same linear rail; [Figure 3] FIG. 10 is a schematic diagram showing the state in which the grinding unit and the camera unit are in their initial positions and are separated from the workpiece (shown by dotted lines, the same applies below). [Figure 4] This is a schematic diagram showing the grinding unit and camera unit descending synchronously along the same linear rail to set the tool. [Figure 5] 10 is a schematic diagram showing the mounting panel moving the camera unit away from the workpiece before the grinding unit processes the workpiece. FIG. [Figure 6] This is a schematic diagram showing that after machining is completed, the grinding unit returns to the tool set position and the mounting panel moves the camera unit closer to the workpiece in conjunction with the grinding unit. [Figure 7] FIG. 4 is a schematic view showing a grinder according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] The following describes in detail the embodiments of the present invention, but the present invention is not limited to these, and various modifications are possible within the scope of the description, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0008] First, a specific embodiment of the grinder of the present invention will be described with reference to FIGS. 1 to 5. FIG.

[0009] The grinder according to the first embodiment of the present invention includes an upright column 1, a grinding unit 2, and a first power source 3 for driving the grinding unit 2 to move up and down. A linear rail 4 is mounted on the upright column 1, extending vertically. The grinding unit 2 is slidably connected to the linear rail 4 and further includes a mounting panel 5 slidably connected to the same linear rail 4, a connection device 6 connected to the mounting panel 5 and the grinding unit 2, and a camera unit 7 and a light source unit 8 fixed to the mounting panel 5. The grinder assembly can be combined with components such as a mounting table T and a conventional base (not shown) to form a complete grinder. The grinding unit 2 is used to machine a workpiece P. The camera unit 7 and light source unit 8 are used to perform vision measurements of the grinding unit 2 and the workpiece P.

[0010] The center of the upright column 1 is hollow in the front-to-rear direction to accommodate the grinding unit 2 (see Figures 1 and 2). In this embodiment, the first power source 3 is a motor located at the top of the upright column 1, and the first power source 3 is connected to the grinding unit 2 by bolts extending up and down, so that the grinding unit 2 moves up and down along the bolts. There are two linear rails 4 in total, which are attached to the front side of the upright column 1 and are parallel to each other, with the grinding unit 2 passing between them.

[0011] 1 and 2, the grinding unit 2 includes a grinding wheel 21 located at the front end, a motor 22 that drives the grinding wheel 21 to rotate, a pivot (not shown) connected to the grinding wheel 21 and the motor 22, an outer case 23 that surrounds the pivot, and an extension plate 24 that extends integrally from the outer case 23 toward the two linear rails 4. The pivot passes between the two linear rails 4 in the front-to-rear direction, and the extension plate 24 is located behind the grinding wheel 21 and is slidably connected to the two linear rails 4 via a plurality of sliders S. In this embodiment, the extension plate 24 is located in front of the linear rails 4 and extends from both the left and right sides of the outer case 23 toward the two linear rails 4, and also extends from both the top and bottom sides of the outer case 23, thereby increasing the area that the extension plate 24 covers over the linear rails 4. By attaching multiple sliders S in this manner, each of the linear rails 4 is slidably connected to the multiple sliders S, thereby improving the stability of the grinding unit 2 as it moves up and down along the two linear rails 4. In this embodiment, the extension plate 24 is integrally connected to the outer case 23.

[0012] As shown in FIGS. 1 and 3 , the mounting panel 5 is installed separately from the grinding unit 2. In this embodiment, the mounting panel 5 is installed in front of the upright column 1, has a rectangular shape, and surrounds the grinding unit 2. The mounting panel 5 includes side panels 51 located on both the left and right sides of the extension plate 24, an upper panel 52 located above the extension plate 24, and a lower panel 53 located below the extension plate 24. The two side panels 51 are connected to the camera unit 7 and the light source unit 8, respectively. The upper panel 52 is integrally connected to the two side panels 51, and the upper panel 52 is slidably connected to the two linear rails 4 via two sliders S. The lower panel 53 is integrally connected to the two side panels 51, and the lower panel 53 is slidably connected to the two linear rails 4 via two sliders S. In this embodiment, the front surfaces of all mounting panels 5 are coplanar with the front surfaces of the extension plates 24, the side panels 51 are located on both the left and right sides of the extension plates 24, the upper panel 52 is located directly above the extension plates 24 and maintains a distance therebetween, and the lower panel 53 is located directly below the extension plates 24 and maintains a distance therebetween, with the distance between the upper panel 52 and the lower panel 53 being greater than the vertical height of the extension plates 24 themselves. If the mounting panels 5 and the extension plates 24 were not coplanar, the distance between the upper panel 52 and the lower panel 53 would be greater than the vertical height of the outer case 23 itself. In this embodiment, a fixing plate 54 is integrally connected to the bottom surface of the upper panel 52, protruding rearward relative to the upper panel 52, and the distances between the fixing plate 54 and the two side panels 51 are equal, and the housing 61 of the connection device 6 is attached to the fixing plate 54. The mounting panel 5 includes two reinforcing plates 55 located on and connected to the fixed plate 54, which is integrally connected to the rear surface of the upper panel 52. In another embodiment, the fixed plate 54 is connected to the upper surface of the lower panel.

[0013] 1, the camera unit 7 includes a camera body 71 and a camera stand 72, and the camera stand 72 is connected to the camera body 71 and the side panel 51. The light source unit 8 includes a light source body 81 and a light source stand 82, and the light source stand 82 is connected to the light source body 81 and the side panel 51. The camera unit 7 collects images of the grinding wheel 21 and / or the workpiece P, and an analysis control unit (e.g., a chip or a microcomputer) provided inside or outside the grinder performs vision detection based on information collected from the aforementioned images.

[0014] 1 to 3 , the connecting device 6 includes a housing 61, a push rod mechanism 62, and a second power source 63. The second power source 63 drives the push rod mechanism 62 to extend and retract up and down relative to the housing 61. The housing 61 is fixed to one of the grinding unit 2 and the mounting panel 5, and the push rod mechanism 62 is fixed to the other of the grinding unit 2 and the mounting panel 5. An electric cylinder may be used as the connecting device 6, and the second power source 63 may be a servo motor. In this embodiment, for convenient installation, the entire connecting device 6 is located above the outer case 23, the second power source 63 is located in front of the housing 61, the housing 61 is fixed above the fixing plate 54 with screws and is located between the two reinforcing plates 55, the push rod mechanism 62 passes through the fixing plate 54, and the lower end of the push rod mechanism 62 is fixed to the extension plate 24 above the outer case 23 and is located behind the extension plate 24.

[0015] As shown in FIGS. 3 and 4, when the second power source 63 is not operating, the push rod mechanism 62 is held stationary relative to the housing 61, making the entire connection device 6 a static connection mechanism connected to the grinding unit 2 and the mounting panel 5. The grinding unit 2 drives the mounting panel 5 and the camera unit 7 fixed to the mounting panel 5 to move up and down synchronously via the connection device 6. The grinding unit 2 and camera unit 7 are positioned in an initial position away from the workpiece P as shown in FIG. 3, and in a tool set position close to the workpiece P as shown in FIG. 4. The camera unit 7 at the tool set position collects images of the grinding wheel 21, the workpiece P, and the necessary tool set references. Moving from the initial position to the tool set position generally requires a large pitch of movement. During this movement, the grinding unit 2 and the mounting panel 5 to which the camera unit 7 is attached may move together, and both may share the same grid ruler. In this embodiment, when the push rod mechanism 62 is held stationary relative to the housing 61, the distance between the lower panel 53 and the grinding unit 2 is longer than the extension pitch of the push rod mechanism 62, and the distance between the upper panel 52 and the grinding unit 2 is longer than the retraction pitch of the push rod mechanism 62. This installation prevents the mounting panel 5 from coming into contact with the grinding unit 2 when it is driven by the connecting device 6 to move up and down relative to the grinding unit 2.

[0016] As shown in FIGS. 4 and 5 , after the tool setting is complete, the grinding unit 2 performs processing on the workpiece P. To avoid dust and debris generated during processing, the camera unit 7 must be separated from the grinding unit 2, so the grinding unit 2 and the mounting panel 5 to which the camera unit 7 is attached must be moved separately. In the example of FIG. 5 , the grinding unit 2 is lowered from the tool setting position to process the workpiece P, and before processing, the mounting panel 5 drives the camera unit 7 to rise from the tool setting position so as to temporarily separate from the workpiece P. When the second power source 63 drives the push rod mechanism 62 to extend and retract relative to the housing 61, in this embodiment, the reaction force generated by the extension and retraction of the push rod mechanism 62 drives the mounting panel 5 to rise and lower relative to the grinding unit 2, and drives the camera unit 7 to rise and lower independently relative to the grinding unit 2. In a more specific example, the relative lifting occurs when the second power source 63 drives the push rod mechanism 62 to extend downward relative to the housing 61, forcing the grinding unit 2 connected to the push rod mechanism 62 to brake or the quality of the grinding unit 2 to become relatively high, so that the push rod mechanism 62 can no longer push the grinding unit 2 downward, and the reaction force causes the housing 61 and the mounting panel 5 to rise. When the second power source 63 drives the push rod mechanism 62 to contract upward relative to the housing 61, the push rod mechanism 62 can similarly no longer pull the grinding unit 2 upward, and the reaction force causes the housing 61 and the mounting panel 5 to descend.

[0017] After the processing is completed, the grinding unit 2 returns to the tool setting position, and the mounting panel 5 drives the camera unit 7 to descend to a certain height the grinding wheel 21 and the workpiece P, and the camera unit 7 collects images of the workpiece P after processing and the used grinding wheel 21, thereby realizing vision measurement (see Figures 5 and 6).

[0018] In other embodiments, other mounting methods may be used for the connection device 6. For example, the housing 61 and the push rod mechanism 62 may be arranged upside down, i.e., the housing 61 is fixed to the extension plate 24 or the outer case 23, and the upper end of the push rod mechanism 62 is fixed to the midpoint of the upper panel 52. Alternatively, for example, the entire connection device 6 may be installed below the outer case 23, the housing 61 is fixed to the fixing plate 54 connected to the lower panel 53, and the upper end of the push rod mechanism 62 is fixed to the extension plate 24 below the outer case 23. In a second embodiment (see FIG. 7), the housing 61 of the connection device 6 is mounted in front of the mounting panel 5, The fixing plate 54 is integrally connected to the bottom surface of the upper panel 52 and protrudes forward relative to the upper panel 52, the reinforcing plate 55 is integrally connected to the front surface of the upper panel 52, the housing 61 is attached to the fixing plate 54 and is located between the two reinforcing plates 55, the push rod mechanism 62 is fixed to the front surface of the extension plate 24 and does not extend beyond the grinding wheel 21 forward, and the entire connecting device 6 is designed to be located between the mounting panel 5 and the upright column 1, making it easy to perform maintenance manually.

[0019] In another embodiment, for example, when the connecting device 6 is placed upside down above the grinding unit 2, the housing 61 is fixed to the grinding unit 2, the upper end of the push rod is connected to the mounting panel 5, and the push rod mechanism 62 directly pushes and pulls the mounting panel 5 up or down by the force of extension and contraction relative to the housing 61.

[0020] The grinder of the present invention has the following beneficial effects: (1) The grinding unit 2 and the camera unit 7 are connected to the same linear rail 4 by the extension plate 24 and the mounting panel 5, respectively, ensuring that the elevation pitches of the grinding unit 2 and the camera unit 7 remain parallel. The extension plate 24 and the mounting panel 5 are connected to the extendable connecting device 6, which allows them to be driven by the connecting device 6 to move toward or away from each other, thereby allowing the grinding unit 2 and the camera unit 7 to move toward or away from each other. When the grinding unit 2 is processing the workpiece P, in the above embodiment, the push rod mechanism 62 extends, causing the mounting panel 5 to rise relative to the extension plate 24, allowing the camera unit 7 to move away from the grinding unit 2 to avoid dust and debris. After the grinding unit 2 completes processing, in the above embodiment, the push rod mechanism 62 retracts, causing the mounting panel 5 to descend relative to the extension plate 24, allowing the camera unit 7 to descend to a certain height for the grinding unit 2 and the workpiece P, respectively, to measure the amount of wear on the grinding unit 2 and the size of the workpiece P, and determine whether the workpiece P has been processed. If no processing has been performed, the amount of wear of the grinding unit 2 is combined, the pitch of the grinding unit 2 and the position of the workpiece P are adjusted, and secondary processing is performed on the workpiece P. The present invention can also be used to detect whether the grinding unit 2 has been corrected. When the grinding unit 2 has been corrected, the camera unit 7 can be moved away from the grinding unit 2. After the correction is completed, the camera unit 7 can move the grinding unit 2 to a certain height so as to detect whether the grinding unit 2 has been corrected.

[0021] Furthermore, the camera unit 7 can be raised and lowered independently of the grinding wheel 21, and the field of view of the camera unit 7 can be independently displaced, so that the bottom of the grinding wheel 21 and the top of the mounting table T can be covered, and the camera unit 7 can be aimed directly at the processing position or the grinding wheel 21 to take pictures, so that images of the grinding wheel 21 and the workpiece P can be obtained, and online measurement of the size of the workpiece P and the amount of wear of the grinding wheel 21 can be performed. Furthermore, when the grinding wheel 21 decreases in the radial direction, the field of view of the camera cannot cover the grinding wheel 21 and the workpiece P at the same time, and because the camera unit 7 can be raised and lowered independently, images of the grinding wheel 21 and the workpiece P can be obtained independently, and the amount of reduction in the radial direction of the grinding wheel 21 can be calculated, so as to avoid secondary reprocessing. , the workpiece P can be machined accurately.

[0022] (2) The housing 61 of the connection device 6 is fixed to the fixed plate 54, which is integrally connected to the upper panel 52 and has an equal distance between it and the two side panels 51, preventing the upper panel 52 from receiving force and losing balance, and contributing to the stable movement of the mounting panel 5 up and down along the two linear rails 4.

[0023] (3) The mounting panel 5 also includes an upper panel 52 and a lower panel 53, both of which are slidably connected to the two linear rails 4 via sliders S, thereby contributing to the stable movement of the entire mounting panel 5 up and down along the two linear rails 4.

[0024] (4) The distance between the upper panel 52 and the lower panel 53 is longer than the vertical height of the outer case 23 or the extension plate 24 itself. The distance between the lower panel 53 and the grinding unit 2 is longer than the extension pitch of the push rod mechanism 62. The distance between the upper panel 52 and the grinding unit 2 is longer than the retraction pitch of the push rod mechanism 62. This installation prevents the mounting panel 5 from coming into contact with the grinding unit 2 when it is driven by the connection device 6 to move up and down relative to the grinding unit 2.

[0025] (5) In another embodiment, to facilitate maintenance of the connecting device 6, the housing 61 is fixed to the front of the mounting panel 5, and the push rod mechanism 62 is fixed to the front of the extension plate 24, and does not extend beyond the grinding wheel 21 forward.

[0026] (6) The extension plate 24 extends vertically relative to the outer case 23 and has multiple sliders S fixed thereto. Each of the linear rails 4 is connected to the multiple sliders S of the extension plate 24, contributing to the stable movement of the grinding unit 2 up and down along the two linear rails 4.

[0027] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0028] 1 upright column 2 Grinding Unit 21 Grindstone 22 Motor 23 External case 24 Extension Plate 3 1st power source 4 Linear Rail 5 Mounting Panel 51 Side Panel 52 Top Panel 53 Lower Panel 54 Fixing plate 55 Reinforcement plate 6 Connecting Devices 61 Housing 62 Push rod mechanism 63 Second power source 7 Camera Unit 71 Camera body 72 Camera Stand 8 Light source unit 81 Light source body 82 Light source stand S slider P Work T mounting table

Claims

1. 1. A grinder comprising: an upright column; a grinding unit; and a first power source for driving the grinding unit to move up and down, The upright column is provided with a linear rail extending vertically, and the grinding unit is slidably connected to the linear rail; The grinder further includes a mounting panel slidably connected to the linear rail, a connection device connecting the mounting panel and the grinding unit, and a camera unit and a light source unit fixed to the mounting panel; the mounting panel and the grinding unit are installed separately, and the mounting panel is installed in front of the upright column; the connecting device includes a housing, a push rod mechanism, and a second power source, the second power source is capable of driving the push rod mechanism to extend and retract up and down relative to the housing, the housing is fixed to one of the grinding unit and the mounting panel, and the push rod mechanism is fixed to the other of the grinding unit and the mounting panel; When the second power source is not activated, the push rod mechanism is stationary relative to the housing, and the connection device acts as a static connection mechanism to connect the grinding unit and the mounting panel, and the first power source drives the grinding unit to move up and down together with the mounting panel and the camera unit connected to the mounting panel; When the second power source drives the push rod mechanism to extend and retract relative to the housing, the mounting panel is driven by an action force or a reaction force generated by the extension and retraction of the push rod mechanism to move up and down relative to the grinding unit, and the camera unit is driven to move up and down independently relative to the grinding unit.

2. 2. The grinder according to claim 1, wherein the upright column has two parallel linear rails, and the grinding unit includes a grinding wheel, a motor that drives the grinding wheel to rotate, a pivot shaft connected to the grinding wheel and the motor, an outer case that surrounds the pivot shaft, and an extension plate that extends integrally from the outer case toward the linear rails, the extension plate being located behind the grinding wheel, the pivot shaft passing between the two linear rails along the front-to-rear direction, and the extension plate and the mounting panel being both slidably connected to the two linear rails by a plurality of sliders.

3. 3. The grinder of claim 2, wherein the mounting panel comprises two side panels located on both the left and right sides of the extension plate and an upper panel located above the extension plate, the two side panels being connected to the camera unit and the light source unit, respectively, the upper panel being integrally connected to the two side panels, and the upper panel being slidably connected to the two linear rails by two sliders.

4. 4. The grinder of claim 3, wherein the mounting panel includes a fixed plate connected to one of the bottom surface of the upper panel and the top surface of the lower panel, the housing is fixed to the fixed plate, and the push rod mechanism is fixed to the extension plate of the grinding unit.

5. 5. The grinder of claim 4, wherein the mounting panel comprises two reinforcing plates located on and connected to the fixed plate, the reinforcing plates being connected to the front surface of the upper panel, the housing being located on the front side of the mounting panel and being located between the two reinforcing plates, the push rod mechanism being fixed to the front surface of the extension plate and not extending beyond the grinding wheel in a forward direction, and the second power source being located behind the housing and above the mounting panel.

6. 5. The grinder of claim 4, wherein the housing is located behind the mounting panel, the push rod mechanism is fixed to the rear surface of the extension plate, and the second power source is located in front of the housing and above the mounting panel.

7. 7. The grinder of claim 6, wherein the mounting panel comprises two reinforcing plates located on and connected to the fixed plate, the reinforcing plates being connected to the rear surface of the upper panel, and the housing being located between the two reinforcing plates.

8. 4. The grinder of claim 3, wherein the mounting panel further comprises a lower panel positioned below the extension plate, the lower panel being integrally connected to the two side panels, the lower panel being connected to the two linear rails by the two sliders, the front surfaces of the upper panel and the lower panel being coplanar with the front surface of the extension plate, and the distance between the upper panel and the lower panel being longer than the vertical height of the extension plate itself.

9. 5. The grinder according to claim 4, wherein the front surfaces of the side panels and the extension plates are coplanar, and the distances between the fixed plate and the two side panels are equal.

10. 3. The grinder according to claim 2, wherein the extension plate protrudes from the outer case in all directions, a plurality of sliders are fixed to the extension plate, and each of the linear rails is connected to the plurality of sliders of the extension plate.

Images