High-precision numerical control grinding machine

Abstract

The high-precision numerical control grinding machine comprises a rack and a control module, a three-axis moving mechanism is installed on the rear side of the upper end face of the rack, a grinding wheel mechanism is installed on the three-axis moving mechanism, and the three-axis moving mechanism is used for driving the grinding wheel mechanism to move along the X axis or the Y axis or the Z axis; a workpiece fixing table and a sand finishing mechanism are installed on the front side of the upper end face of the rack. A calibration mechanism is installed on the grinding wheel mechanism and used for calibrating the height of the working face of the sand finishing mechanism, and the three-axis moving mechanism, the grinding wheel mechanism and the calibration mechanism are all electrically connected with the control module. The height information of the working face of the sanding mechanism is obtained through the calibration mechanism, the height information of the grinding wheel mechanism during sanding is obtained, the actual size of the grinding wheel can be obtained by subtracting the height information of the working face of the sanding mechanism from the height information of the working face of the sanding mechanism during sanding, and then the height information of the working face of the grinding wheel is obtained. Therefore, the machining accuracy of the grinding machine can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machines, and in particular to a high-precision numerically controlled grinding machine. Background Art

[0002] CNC grinding machines are machine tools that use grinding wheels to grind workpiece surfaces through CNC technology. After the grinding wheel has been working for a period of time, the sand grains of the grinding wheel gradually become blunt, and the spaces between the sand grains are filled with cutting and sand fragments, causing the grinding wheel to lose its original function and affecting the surface finish of the workpiece after grinding. Therefore, the grinding wheel must be regularly trimmed.

[0003] However, as the grinding wheel is dressed and shaped, the grinding wheel will also cause wear and tear to the sand dressing device, resulting in increased errors and reduced grinding accuracy; and when replacing the sand dressing device, due to processing and assembly errors, the replaced sand dressing device and the sand dressing device before replacement will not be on the same reference plane, which will also affect the processing accuracy of the CNC grinder.

[0004] Based on the above technical problems, the present application proposes a high-precision CNC grinding machine. Summary of the invention

[0005] The purpose of the present invention is to provide a high-precision CNC grinding machine to solve the technical problems mentioned in the background technology. The purpose of the present invention is achieved through the following technical solutions:

[0006] A high-precision CNC grinding machine comprises a frame and a control module. A three-axis moving mechanism is installed on the rear side of the upper end surface of the frame, a grinding wheel mechanism is installed on the three-axis moving mechanism, and the three-axis moving mechanism is used to drive the grinding wheel mechanism to move along the X-axis, Y-axis or Z-axis; a workpiece fixing table and a sanding mechanism are installed on the front side of the upper end surface of the frame; a calibration mechanism is installed on the grinding wheel mechanism, and the calibration mechanism is used to calibrate the working surface height of the sanding mechanism, and the three-axis moving mechanism, the grinding wheel mechanism and the calibration mechanism are all electrically connected to the control module.

[0007] Furthermore, the three-axis moving mechanism includes an X-axis moving assembly, a Y-axis moving assembly and a Z-axis moving assembly, the X-axis moving assembly is installed on the frame, the Z-axis moving assembly is installed on the X-axis moving assembly, the Y-axis moving assembly is installed on the Z-axis moving assembly, and the grinding wheel mechanism is installed on the Y-axis moving assembly.

[0008] Furthermore, a grating ruler is installed on the Z-axis moving component, and the grating ruler is electrically connected to the control module.

[0009] Furthermore, the sand repairing mechanism comprises a fixed seat, a fixed sleeve is obliquely installed on the fixed seat, a sand repairing pen is installed in the fixed sleeve, a threaded hole is opened on the side of the fixed sleeve, a top screw is screwed in the threaded hole, and the top screw abuts against the sand repairing pen.

[0010] Furthermore, the calibration mechanism includes a connecting seat, a calibration rod and a sensor. The connecting seat is fixed on one side of the grinding wheel mechanism. A cavity with an opening at the lower end is opened in the connecting seat. The sensor is installed at the top of the cavity. The calibration rod is floatingly installed below the sensor, and the lower end of the calibration rod extends out of the cavity.

[0011] Furthermore, the sensor is a contact sensor or a non-contact sensor, and the sensor is electrically connected to the control module.

[0012] Furthermore, the grinding wheel mechanism includes a rotating motor, a grinding wheel and a grinding wheel cover. The rotating motor is connected to the three-axis moving mechanism. The grinding wheel is fixedly connected to the output shaft of the rotating motor. The grinding wheel cover is arranged on the outside of the grinding wheel. A spray mechanism is fixed to the side of the grinding wheel cover.

[0013] Furthermore, the spray mechanism includes a spray pipe and a spray head, and the spray head faces the lowest point of the grinding wheel.

[0014] Furthermore, the spray mechanism is connected to the grinding wheel cover through a lifting mechanism, the lifting mechanism includes a mounting seat, a accommodating cavity is opened in the mounting seat, the spray pipe is vertically inserted into the mounting seat, a lifting plate is fixed to the outer wall of the spray pipe, a compression spring is arranged on the outer sleeve of the spray pipe, and the compression spring is located between the lifting plate and the bottom surface of the accommodating cavity; a lifting drive component is installed on the top of the mounting seat, the lifting end of the lifting drive component extends into the accommodating cavity and abuts against the upper end surface of the lifting plate, and the lifting drive component is electrically connected to the control module.

[0015] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0016] 1. Obtain the working surface height information of the sand dressing mechanism through the calibration mechanism, and obtain the height information of the grinding wheel mechanism during sand dressing. Subtract the height information of the working surface of the sand dressing mechanism from the height information of the grinding wheel mechanism during sand dressing to obtain the actual size of the grinding wheel, and then obtain the height information of the working surface of the grinding wheel, so as to improve the accuracy of the grinding machine processing;

[0017] 2. The height of the spray mechanism can be adjusted in real time through the lifting mechanism, so that the spray head of the spray mechanism is always facing the lowest point of the grinding wheel, so as to flush out the debris and fallen sand particles generated by grinding in time, avoid scratches on the product, and improve the quality of product grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 This is a schematic diagram of the structure from the front side perspective of an embodiment of the present application;

[0020] Figure 2 for Figure 1 A partial enlarged view of

[0021] Figure 3 This is a schematic diagram of the lifting mechanism structure of the embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of the sand repair mechanism in the embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the structure from the rear side perspective of an embodiment of the present application;

[0024] Figure 6 for Figure 5 A partial enlarged view of

[0025] Figure 7 This is a schematic diagram of the calibration mechanism structure of an embodiment of the present application.

[0026] Markings in the attached figure: 1. frame; 11. baffle; 2. CNC table; 3. three-axis moving mechanism; 31. X-axis moving assembly; 32. Z-axis moving assembly; 321. grating ruler; 33. Y-axis moving assembly; 4. grinding wheel mechanism; 41. rotating motor; 42. grinding wheel; 43. grinding wheel cover; 44. motor seat; 5. calibration mechanism; 51. connecting seat; 52. calibration rod; 521. limit groove; 53. sensor; 54. compression spring; 55. limit pin; 6. workpiece fixing table; 7. sand repair mechanism; 71. fixing seat; 72. fixing sleeve; 721. threaded hole; 73. sand repair pen; 731. diamond particles; 74. top screw; 8. spray mechanism; 81. spray pipe; 82. spray head; 83. lifting plate; 9. lifting mechanism; 91. mounting seat; 92. compression spring; 93. lifting drive member. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-7A high-precision CNC grinding machine shown includes a frame 1, a CNC table 2, a three-axis moving mechanism 3, a grinding wheel mechanism 4, a calibration mechanism 5, a workpiece fixing table 6 and a sanding mechanism 7. The frame 1 is a box with a rectangular structure, the three-axis moving mechanism 3 is installed on the rear side of the upper end surface of the frame 1, and the grinding wheel mechanism 4 is installed on the three-axis moving mechanism 3. The three-axis moving mechanism 3 is used to drive the grinding wheel mechanism 4 to move along the X-axis, Y-axis or Z-axis. The workpiece fixing table 6 and the sanding mechanism 7 are both installed on the front side of the upper end surface of the frame 1. The calibration mechanism 5 is installed on the side of the grinding wheel mechanism 4, and the calibration mechanism 5 is used to calibrate the working surface height of the sanding mechanism 7. A control module for controlling the CNC grinding machine is installed in the frame 1, and the three-axis moving mechanism 3, the grinding wheel mechanism 4, and the calibration mechanism 5 are all electrically connected to the control module, so that the control of the three-axis moving mechanism 3, the grinding wheel mechanism 4, and the calibration mechanism 5 can be realized. The numerical control table 2 is connected to the control module through a wire and is used to write parameters or instructions to the control module to realize the operation of various components of the numerical control grinding machine.

[0029] like Figure 1 , Figure 5 As shown, the three-axis moving mechanism 3 includes an X-axis moving assembly 31, a Z-axis moving assembly 32 and a Y-axis moving assembly 33. The X-axis moving assembly 31 is horizontally mounted on the top of the frame 1, and the Z-axis moving assembly 32 is vertically mounted on the X-axis moving assembly 31. The X-axis moving assembly 31 can drive the Z-axis moving assembly 32 to reciprocate along the X-axis direction. The Y-axis moving assembly 33 is horizontally mounted on the Z-axis moving assembly 32, and the Z-axis moving assembly 32 can drive the Y-axis moving assembly 33 to reciprocate along the Z-axis direction. The grinding wheel mechanism 4 is mounted on the Y-axis moving assembly 33, and the Y-axis moving assembly 33 can drive the grinding wheel mechanism 4 to reciprocate along the Y-axis direction. Thereby, the grinding wheel mechanism 4 is moved in the X-axis, Y-axis and Z-axis directions. Among them, the X-axis moving assembly 31, the Z-axis moving assembly 32 and the Y-axis moving assembly 33 are all screw linear modules, and the X-axis moving assembly 31 and the Z-axis moving assembly 32 are both installed with accordion covers on the outside to prevent the waste chips generated by the grinding process from contaminating the X-axis moving assembly 31 and the Z-axis moving assembly 32, thereby ensuring the service life of the three-axis moving mechanism 3. Preferably, a grating ruler 321 is installed on the Z-axis moving assembly 32, and the grating ruler 321 is electrically connected to the control module for accurately identifying the height information of the Z-axis moving assembly 32.

[0030] like Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the grinding wheel mechanism 4 includes a rotating motor 41, a grinding wheel 42 and a grinding wheel cover 43. The rotating motor 41 is connected to the Y-axis moving assembly 33 through a motor seat 44. The grinding wheel 42 is fixedly connected to the output shaft of the rotating motor 41 through a connecting flange. The grinding wheel cover 43 is arranged on the upper part of the grinding wheel 42 to prevent the grinding waste from splashing. Preferably, a spray mechanism 8 is fixed on the side of the grinding wheel cover 43. The spray mechanism 8 includes a spray pipe 81 and a spray head 82. The spray head 82 faces the lowest point of the grinding wheel and is used to flush the waste generated by grinding from between the grinding wheel and the workpiece to avoid scratches on the surface of the workpiece.

[0031] like Figure 1 As shown, a baffle 11 is installed on the front side of the upper end surface of the frame 1, and the workpiece fixing table 6 and the sanding mechanism 7 are both installed in the baffle 11. Preferably, the workpiece fixing table 6 is a magnetic fixing table, which is mainly used for thinning operations of planar workpieces.

[0032] like Figure 1 , Figure 4 As shown, the sanding mechanism 7 includes a fixed seat 71, which is a rectangular plate and fixedly mounted on the left side of the workpiece fixing table 6. A fixed sleeve 72 is obliquely mounted on the fixed seat 71, and a sanding pen 73 is mounted in the fixed sleeve 72. A threaded hole 721 is provided on the side of the fixed sleeve 72, and a top screw 74 is screwed in the threaded hole 721. The top screw 74 abuts against the side wall of the sanding pen 73 to fix the sanding pen 73 in the fixed sleeve 72. Diamond particles 731 are mounted on the end of the sanding pen 73. During sanding, the three-axis moving mechanism 3 moves the grinding wheel of the grinding wheel mechanism 4 to the sanding pen 73, and the diamond particles 731 are used to trim the grinding wheel of the grinding wheel mechanism 4. When the sanding pen 73 is worn, the top screw 74 is loosened and the sanding pen 73 is rotated by a certain angle, and the sanding operation is continued at the unworn position of the sanding pen 73 to increase the service life of the sanding pen 73. When the sanding pen 73 is completely worn out, loosen the top screw 74 to replace the sanding pen 73 .

[0033] like Figure 5-Figure 7 As shown, the calibration mechanism 5 includes a connection seat 51, a calibration rod 52 and a sensor 53. The connection seat 51 is fixed to one side of the motor seat 44. A cavity with an opening at the lower end is provided in the connection seat 51. The sensor 53 is installed at the top of the cavity. The calibration rod 52 is floatingly installed below the sensor 53 through a spring 54, and the lower end of the calibration rod 52 extends out of the cavity. Among them, the sensor 53 is a contact sensor such as a micro switch, or a non-contact sensor such as a photoelectric switch, and the sensor 53 is electrically connected to the control module.

[0034] When in use, first move the calibration mechanism 5 to the top of the sand dressing mechanism 7 through the three-axis moving mechanism 3, so that the calibration rod 52 is located at the diamond particles 731 of the sand dressing pen 73, and slowly press down the calibration mechanism 5 to make the calibration rod 52 contact with the sand dressing pen 73 and compress the spring 54 to move up to trigger the sensor 53, and the calibration mechanism 5 stops pressing down and records the height information H1 of the grinding wheel mechanism 4 at this time.

[0035] Then, the grinding wheel mechanism 4 is moved to the top of the sand dressing mechanism 7 by the three-axis moving mechanism 3, the grinding wheel 42 is trimmed, and the height information H2 of the grinding wheel mechanism 4 is recorded. The height of the working surface of the grinding wheel mechanism 4 can be obtained by subtracting the height H1 from H2, so that the working surface of the grinding wheel can be accurately positioned, thereby improving the accuracy of the grinding machine.

[0036] Preferably, a limit pin 55 is installed at the lower end of the cavity of the calibration mechanism 5, and a matching limit groove 521 is provided on the calibration rod 52 to avoid damage to the sensor 53 caused by excessive downward pressure.

[0037] like Figure 2 , Figure 3 As shown, the spray mechanism 8 is connected to the grinding wheel cover 43 through a lifting mechanism 9. The lifting mechanism 9 includes a mounting seat 91, which is a rectangular shell with an accommodating cavity inside. The spray pipe 81 is vertically inserted on the mounting seat 91, and a lifting plate 83 is fixed to the outer wall of the spray pipe 81, and the lifting plate 83 is located in the accommodating cavity. The outer side of the spray pipe 81 is sleeved with a compression spring 92, and the compression spring 92 is located between the lifting plate 83 and the bottom surface of the accommodating cavity. A lifting drive member 93 is installed on the top of the mounting seat 91, and the lifting end of the lifting drive member 93 extends into the accommodating cavity and abuts against the upper end surface of the lifting plate 83. When the lifting drive member 93 is extended, the lifting plate 83 is pushed down, so that the spray head 82 moves down. When the lifting drive member 93 is retracted, the lifting plate 83 rises under the action of the compression spring 92, so that the spray head 82 rises. The lifting drive 93 is a precision electric push rod, which is electrically connected to the control module. The lifting drive 93 can rise according to the wear of the grinding wheel 42 so that the spray head 82 is always facing the connection between the grinding wheel 42 and the workpiece.

[0038] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0039] 1. Obtain the working surface height information of the sand dressing mechanism through the calibration mechanism, and obtain the height information of the grinding wheel mechanism during sand dressing. Subtract the height information of the working surface of the sand dressing mechanism from the height information of the grinding wheel mechanism during sand dressing to obtain the actual size of the grinding wheel, and then obtain the height information of the working surface of the grinding wheel, so as to improve the accuracy of the grinding machine processing;

[0040] 2. The height of the spray mechanism can be adjusted in real time through the lifting mechanism, so that the spray head of the spray mechanism is always facing the lowest point of the grinding wheel, so as to flush out the debris and fallen sand particles generated by grinding in time, avoid scratches on the product, and improve the quality of product grinding.

[0041] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision CNC grinding machine, characterized in that: It includes a frame and a control module, wherein a three-axis moving mechanism is installed on the rear side of the upper end surface of the frame, a grinding wheel mechanism is installed on the three-axis moving mechanism, and the three-axis moving mechanism is used to drive the grinding wheel mechanism to move along the X-axis, Y-axis or Z-axis; a workpiece fixing table and a sanding mechanism are installed on the front side of the upper end surface of the frame; a calibration mechanism is installed on the grinding wheel mechanism, and the calibration mechanism is used to calibrate the working surface height of the sanding mechanism, and the three-axis moving mechanism, the grinding wheel mechanism and the calibration mechanism are all electrically connected to the control module.

2. A high-precision CNC grinding machine according to claim 1, characterized in that: The three-axis moving mechanism includes an X-axis moving assembly, a Y-axis moving assembly and a Z-axis moving assembly, the X-axis moving assembly is installed on the frame, the Z-axis moving assembly is installed on the X-axis moving assembly, the Y-axis moving assembly is installed on the Z-axis moving assembly, and the grinding wheel mechanism is installed on the Y-axis moving assembly.

3. A high-precision CNC grinding machine according to claim 2, characterized in that: A grating ruler is installed on the Z-axis moving component, and the grating ruler is electrically connected to the control module.

4. A high-precision CNC grinding machine according to claim 1, characterized in that: The sand repairing mechanism comprises a fixing seat, a fixing sleeve is obliquely installed on the fixing seat, a sand repairing pen is installed in the fixing sleeve, a threaded hole is opened on the side of the fixing sleeve, a top screw is screwed in the threaded hole, and the top screw abuts against the sand repairing pen.

5. The high-precision CNC grinding machine according to claim 1, characterized in that: The calibration mechanism includes a connecting seat, a calibration rod and a sensor. The connecting seat is fixed on one side of the grinding wheel mechanism. A cavity with an opening at the lower end is opened in the connecting seat. The sensor is installed on the top of the cavity. The calibration rod is floatingly installed below the sensor, and the lower end of the calibration rod extends out of the cavity.

6. A high-precision CNC grinding machine according to claim 5, characterized in that: The sensor is a contact sensor or a non-contact sensor, and the sensor is electrically connected to the control module.

7. A high-precision CNC grinding machine according to claim 1, characterized in that: The grinding wheel mechanism includes a rotating motor, a grinding wheel and a grinding wheel cover. The rotating motor is connected to the three-axis moving mechanism. The grinding wheel is fixedly connected to the output shaft of the rotating motor. The grinding wheel cover is arranged on the outside of the grinding wheel. A spray mechanism is fixed on the side of the grinding wheel cover.

8. A high-precision CNC grinding machine according to claim 7, characterized in that: The spray mechanism comprises a spray pipe and a spray head, and the spray head faces the lowest point of the grinding wheel.

9. A high-precision CNC grinding machine according to claim 8, characterized in that: The spray mechanism is connected to the grinding wheel cover through a lifting mechanism, and the lifting mechanism includes a mounting seat, a containing cavity is provided in the mounting seat, the spray pipe is vertically inserted into the mounting seat, a lifting plate is fixed to the outer wall of the spray pipe, a compression spring is arranged on the outer sleeve of the spray pipe, and the compression spring is located between the lifting plate and the bottom surface of the containing cavity; a lifting drive member is installed on the top of the mounting seat, the lifting end of the lifting drive member extends into the containing cavity and abuts against the upper end surface of the lifting plate, and the lifting drive member is electrically connected to the control module.

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