Automatic numerical control milling and grinding machine for milling and grinding superhard materials

Abstract

The utility model discloses an automatic numerical control milling and grinding machine for milling and grinding a superhard material. A turnover assembly comprises a turnover grabbing part and a turnover driving part which is arranged on a workpiece spindle box and drives the turnover grabbing part to turn over from the horizontal direction to the vertical direction; the swing arm assembly comprises a rotating drive and a swing arm, the output end of the rotating drive is arranged in the length direction of the base and drives the swing arm to rotate, a lofting grabbing part is arranged at the free end of the swing arm, and the rotating range of the lofting grabbing part corresponds to the chuck and the overturning grabbing part in the vertical state; according to the automatic numerical control milling and grinding machine for milling and grinding the superhard materials, the XY mechanical arm assembly, the overturning assembly, the swing arm assembly and the second transverse drive are matched to achieve automatic transferring of products or dressing grinding wheels, an additional grinding wheel dressing system does not need to be additionally arranged, and constant-speed feeding cutting with the constant cutting amount is achieved. Whether the grinding wheel needs to be trimmed or not can be automatically judged through the first transverse driving working state, and more intuition and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the field of milling machine structures, in particular to an automatic numerical control milling machine for milling and grinding superhard materials. Background Art

[0002] There is an increasing demand for detailed processing of materials such as glass, sapphire, quartz and ceramics (including flat surface processing and curved surface processing, etc.), such as milling and grinding of superhard materials such as sapphire and zirconia ceramics.

[0003] A milling machine is a mechanical device mainly used for milling and grinding workpieces. It combines the two processes of milling and grinding, and can complete roughing and finishing processes at the same time. Traditional milling machines use manual feeding operation, which controls the product on the workpiece axis to move forward by manually turning the handle and applies grinding pressure through springs and counterweights. The feed amount cannot be accurately controlled. When processing super-hard materials with a Mohs hardness greater than 6 such as sapphire and zirconia ceramics, the grinding wheel is more likely to be blocked, resulting in the inability to grind the product.

[0004] The current milling machines lack automation, have low processing efficiency, and require frequent manual dressing of the grinding wheel, which is labor-intensive, inefficient, and dangerous. Utility Model Content

[0005] The main purpose of the utility model is to provide an automatic CNC milling machine for superhard material milling, aiming to solve the problems of lack of automation of the milling machine, low processing efficiency, and frequent manual dressing of the grinding wheel, which has high labor intensity, low efficiency, and great danger of manual dressing of the grinding wheel.

[0006] In order to achieve the above-mentioned object, the utility model provides an automatic CNC milling machine for superhard material milling and grinding, comprising:

[0007] Base;

[0008] A workpiece spindle box is mounted on the base and has a chuck at the output end;

[0009] A first transverse drive drives the workpiece spindle box to move along the length direction of the base;

[0010] A product tray mounted on the workpiece spindle box;

[0011] An XY manipulator assembly comprises a sampling grabbing portion and a two-dimensional driving portion which is arranged on the workpiece spindle box and drives the sampling grabbing portion to move on a plane;

[0012] A turning assembly, comprising a turning grabbing portion and a turning driving portion which is arranged on the workpiece spindle box and drives the turning grabbing portion to turn from horizontal to vertical;

[0013] A swing arm assembly, comprising a rotary drive and a swing arm, wherein the output end of the rotary drive is arranged along the length direction of the base and drives the swing arm to rotate, and a lofting gripping portion is arranged at the free end of the swing arm, wherein the rotation range of the lofting gripping portion corresponds to the chuck and the flip gripping portion in a vertical state;

[0014] A second lateral drive drives the swing arm assembly to move along the length direction of the base;

[0015] A grinding wheel spindle box is arranged on the base and an output end of which corresponds to an output end of the workpiece spindle box;

[0016] A control system is connected to control the workpiece spindle box, the first transverse drive, the XY manipulator assembly, the flip assembly, the swing arm assembly and the second transverse drive.

[0017] Furthermore, the grinding wheel spindle box is fixed at an adjustable angle within the plane of the base.

[0018] Furthermore, the grinding wheel spindle box is angle-adjusted within the plane of the base by a hand wheel drive.

[0019] Furthermore, the position of the workpiece spindle box in the width direction of the base is adjustable.

[0020] Furthermore, the position adjustment of the workpiece spindle box in the width direction of the base is driven by a hand wheel.

[0021] Furthermore, the swing arm includes a first swing arm and a second swing arm which are bifurcated in the second transverse driving rotation plane.

[0022] Furthermore, the first lateral drive is a servo drive system.

[0023] Furthermore, the grinding wheel spindle box is of variable frequency motor control type.

[0024] Furthermore, the automatic numerically controlled milling machine also includes a negative pressure system, and the negative pressure system is connected to the sampling grasping part, the flipping grasping part and the lofting grasping part.

[0025] Furthermore, the flipping and grasping portion is of a clamping type.

[0026] The automatic CNC milling machine for superhard material milling provided by the utility model realizes the automatic transfer of products or dressing wheels through the cooperation of XY manipulator assembly, flip assembly, swing arm assembly and second lateral drive, and does not need to install additional grinding wheel dressing system, and realizes uniform feed cutting with constant cutting amount. When processing superhard materials such as sapphire and zirconia ceramics, it greatly reduces the clogging of grinding wheels and avoids the need to dress grinding wheels. It can also automatically judge whether the grinding wheel needs to be dressed through the working state of the first lateral drive, which is more intuitive and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of an automatic CNC milling machine for superhard material milling and grinding according to an embodiment of the utility model (the flip grabbing part is in a horizontal state);

[0028] Figure 2 yes Figure 1 Local magnification in

[0029] Figure 3 It is a schematic diagram of an automatic CNC milling machine for superhard material milling and grinding according to an embodiment of the utility model (the flip grabbing part is in a vertical state);

[0030] Figure 4 yes Figure 3 A local enlargement of the .

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0034] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0035] Reference Figures 1 to 4 In one embodiment of the utility model, an automatic CNC milling machine for superhard material milling and grinding comprises:

[0036] Base 100;

[0037] A workpiece spindle box 200 is mounted on the base 100 and has a chuck 210 at the output end;

[0038] A first transverse drive 300 drives the workpiece spindle box 200 to move along the length direction of the base 100;

[0039] A product tray 400 is mounted on the workpiece spindle box 200;

[0040] An XY manipulator assembly, comprising a sampling grabbing portion 510 and a two-dimensional driving portion 520 disposed on the workpiece spindle box 200 and driving the sampling grabbing portion 510 to move on a plane;

[0041] A flip assembly, comprising a flip grabbing portion 610 and a flip driving portion 620 disposed on the workpiece spindle box 200 and driving the flip grabbing portion 610 to flip from horizontal to vertical;

[0042] A swing arm assembly, comprising a rotary drive 710 and a swing arm 720, wherein the output end of the rotary drive 710 is arranged along the length direction of the base 100 and drives the swing arm 720 to rotate, and a lofting gripping portion 721 is arranged at the free end of the swing arm 720, wherein the rotation range of the lofting gripping portion 721 corresponds to the chuck 210 and the flip gripping portion 610 in the vertical state;

[0043] A second lateral drive 800 drives the swing arm assembly to move along the length direction of the base 100;

[0044] A grinding wheel spindle box 900 is arranged on the base 100 and an output end thereof corresponds to an output end of the workpiece spindle box 200;

[0045] The control system is connected to control the workpiece spindle box 200, the first transverse drive 300, the XY robot assembly, the flip assembly, the swing arm assembly and the second transverse drive 800.

[0046] In the prior art, the milling machine lacks automation, and the processing efficiency is low. In addition, the grinding wheel needs to be frequently manually dressed, which is labor-intensive, inefficient, and dangerous.

[0047] In the present invention, the base 100 serves as the overall structural foundation.

[0048] The output end of the workpiece spindle box 200 is provided with a chuck 210. The output end of the workpiece spindle box 200 completes the rotation action. The chuck 210 at the output end can complete the clamping action. The specific working form of the chuck 210 can be a chuck, etc., and the driving mode can be a motor or pneumatic.

[0049] The first transverse drive 300 drives the workpiece spindle box 200 to move along the length direction of the base 100. The power of the first transverse drive 300 can be pneumatic drive, hydraulic drive, motor drive, etc. The second transverse drive 800 works to achieve grinding feed.

[0050] The product tray 400 is mounted on the workpiece spindle box 200. The product tray 400 stores products (which can be arranged in a rectangular array) and dressing grinding wheels (the number is not limited to one).

[0051] The XY manipulator assembly is arranged corresponding to the product tray 400. The XY manipulator assembly includes a sampling grabbing part 510 and a two-dimensional driving part 520 arranged on the workpiece spindle box 200 and driving the sampling grabbing part 510 to move on a plane. The specific implementation method of the two-dimensional driving part 520 can be composed of two vertically arranged one-dimensional driving structures, and the power of the specific one-dimensional driving structure can be pneumatic drive, hydraulic drive, motor drive, etc. Through the operation of the two-dimensional driving part 520, the sampling grabbing part 510 can be driven on a two-dimensional plane to complete the driving of the sampling grabbing part 510. The grabbing method of the sampling grabbing part 510 can be negative pressure or mechanical clamping, etc., which shall be based on the ability to complete the clamping action.

[0052] The flip assembly includes a flip grasping part 610 and a flip driving part 620 which is arranged on the workpiece spindle box 200 and drives the flip grasping part 610 to flip from horizontal to vertical. Generally, the product is placed horizontally on the product tray 400, and is placed vertically on the chuck 210; therefore, a flip assembly is introduced. The flip assembly is arranged corresponding to the product tray 400, and the XY manipulator assembly can complete the transfer of the product between the flip grasping part 610 in a horizontal state and the product tray 400. The driving source of the flip driving part 620 can be pneumatic drive, hydraulic drive, motor drive, etc., and specifically adjusts the product from a horizontal state to a vertical state during the working process. The gripping method of the flip grasping part 610 can be negative pressure or mechanical clamping, etc., which is based on the ability to complete the clamping action.

[0053] The swing arm assembly includes a rotary drive 710 and a swing arm 720. The output end of the rotary drive 710 is arranged along the length direction of the base 100 and drives the swing arm 720 to rotate. A lofting gripping portion 721 is arranged at the free end of the swing arm 720. The rotation range of the lofting gripping portion 721 corresponds to the chuck 210 and the flip gripping portion 610 in the vertical state. The swing arm assembly completes the transfer of the product between the flip gripping portion 610 and the chuck 210. The gripping method of the lofting gripping portion 721 can be negative pressure or mechanical clamping, etc., which is based on whether the clamping action can be completed. The driving source of the rotary drive 710 can be pneumatic drive, hydraulic drive, motor drive, etc.

[0054] The second transverse drive 800 drives the swing arm assembly to move along the length direction of the base 100. Since the swing arm assembly can only complete the rotational movement, the movement in the depth direction of the chuck 210 cannot be completed. Therefore, the above-mentioned function is completed by the setting of the second transverse drive 800. The driving source of the second transverse drive 800 can be pneumatic drive, hydraulic drive, motor drive, etc. The grinding wheel spindle box 900 is arranged on the base 100 and the output end is arranged corresponding to the output end of the workpiece spindle box 200. A grinding wheel is arranged on the output end of the grinding wheel spindle box 900. When the grinding wheel spindle box 900 is working, the grinding wheel rotates to complete the processing.

[0055] The control system connects and controls the workpiece spindle box 200, the first transverse drive 300, the XY manipulator assembly, the flip assembly swing arm assembly and the second transverse drive 800. The specific working mode of the control system can be program control or sensor control.

[0056] During operation: the workpiece spindle box 200 is arranged on the base 100, and the output end has a chuck 210, and the product tray 400 is installed on the workpiece spindle box 200, so that the product tray 400 can move with the workpiece spindle box 200. The XY manipulator assembly can grab the product or the dressing grinding wheel on the product tray 400 and place it on the flip grabbing part 610 of the flip assembly in a horizontal state, and the flip driving part 620 drives the flip grabbing part 610 to adjust the direction of the product or the dressing grinding wheel from horizontal to vertical. The swing arm assembly transfers the product or the dressing grinding wheel from the flip assembly position to the chuck 210 of the workpiece spindle box 200, and inserts the product or the dressing grinding wheel into the chuck 210 through the second transverse drive 800. The first transverse drive 300 drives the workpiece spindle box 200 to move closer to the grinding wheel spindle box 900 to complete the work. High-concentration cutting fluid or hydraulic oil specially used for glass engraving machines can be used as cutting fluid, which can effectively reduce the clogging of glass powder and greatly extend the use time of the grinding wheel after dressing. The process of transferring the product or the dressed grinding wheel back to the product disk 400 after the specific processing is completed or the grinding wheel dressing is completed, refer to the reverse process above. Since the dressing sand disc and the product are both clamped on the chuck 210, the dressing position of the dressing sand disc on the grinding wheel and the grinding position of the product relative to the grinding wheel are completely consistent, and the dressing effect is better. This grinding wheel dressing method of clamping the dressing sand disc on the chuck 210 is suitable for all types of milling machines.

[0057] In summary, the cooperation of the XY manipulator assembly, the flip assembly, the swing arm assembly and the second lateral drive 800 realizes the automatic transfer of the product or the dressing wheel, without the need to install an additional grinding wheel dressing system, and realizes the uniform feed cutting with a constant cutting amount. When processing superhard materials such as sapphire and zirconia ceramics, it greatly reduces the clogging of the grinding wheel and avoids manual dressing of the grinding wheel. The working status of the first lateral drive 300 can also automatically determine whether the grinding wheel needs to be dressed, which is more intuitive and reliable.

[0058] Reference Figure 1 In one embodiment, the grinding wheel spindle box 900 is fixed and adjustable in the plane of the base 100 .

[0059] In this embodiment, considering the requirements of different processing shapes, the grinding wheel spindle box 900 is arranged to rotate in the plane of the base 100. For example, the basic structure of the grinding wheel spindle box 900 is disc-shaped and hinged to the base 100, so that the angle can be adjusted in the plane; the driving source for driving the basic structure of the grinding wheel spindle box 900 to rotate can be a motor drive or a manual drive.

[0060] Reference Figure 1 In one embodiment, the grinding wheel spindle box 900 is angle-adjusted within the plane of the base 100 by a hand wheel drive.

[0061] In this embodiment, after the product processing requirements are determined, the grinding wheel spindle box 900 does not need to be adjusted, so it is advantageous to set the adjustment mode of the grinding wheel spindle box 900 to manual, which is simple in structure and reduces the possibility of abnormality of the entire system. For example, the basic structure of the grinding wheel spindle box 900 is disc-shaped and hinged to the base 100, and can form an adjustable angle in a plane; the outer periphery of the basic structure of the grinding wheel spindle box 900 is provided with a gear structure, and the handwheel is linked to the basic structure of the grinding wheel spindle box 900 through the corresponding gear transmission structure.

[0062] Reference Figure 1 In one embodiment, the position of the workpiece spindle box 200 in the width direction of the base 100 is adjustable.

[0063] In this embodiment, considering the requirements for different processing positions of the product, the workpiece spindle box 200 is set to be adjustable in the width direction of the base 100, so that the alignment between the output end of the grinding wheel spindle box 900 and the output end of the workpiece spindle box 200 can be adjusted to meet the processing requirements. As mentioned above, the adjustment method of the workpiece spindle box 200 in the width direction of the base 100 can be various, such as motor drive or manual drive. In a specific implementation process, a track structure is set in the width direction of the base 100, and the workpiece spindle box 200 is set on the track structure, thereby realizing the guidance of the movement of the workpiece spindle box 200.

[0064] Reference Figure 1 In one embodiment, the position adjustment of the workpiece spindle box 200 in the width direction of the base 100 is driven by a hand wheel.

[0065] In this embodiment, after the product processing requirements are determined, the adjustment of the workpiece spindle box 200 in the width direction of the base 100 is no longer required, so it is advantageous to set the adjustment mode of the workpiece spindle box 200 to manual, which is simple in structure and reduces the possibility of abnormality of the entire system. For example, a track structure is set in the width direction of the base 100, and the workpiece spindle box 200 is set on the track structure, thereby realizing the guidance of the movement of the workpiece spindle box 200, and the hand wheel is linked to the workpiece spindle box 200 through the corresponding gear transmission structure.

[0066] Reference Figures 1 to 4 In one embodiment, the swing arm 720 includes a first swing arm and a second swing arm bifurcated within the rotation plane of the second lateral drive 800 .

[0067] In this embodiment, in order to improve the use efficiency of the entire automatic CNC milling machine, the swing arm 720 is configured to include a first swing arm and a second swing arm, and the free ends of the first swing arm and the second swing arm are respectively provided with a lofting grabbing portion 721 (preferably a negative pressure type), so that one of the two can be used as a temporary storage product. In a specific implementation process, the lofting grabbing portion 721 on the first swing arm grabs the product to be processed, the second swing arm is first driven to grab the product that has been processed, and then the first swing arm completes the lofting process.

[0068] In one embodiment, the first lateral drive 300 is a servo drive system.

[0069] In this embodiment, considering that the first transverse drive 300 drives the workpiece spindle box 200 to provide pressure regulation between the product and the grinding wheel, the first transverse drive 300 is set as a servo drive system, so that the refinement of the pressure regulation is guaranteed. The first transverse drive 300 is set as a servo drive system, so that the current during grinding can be read and recorded. When the grinding wheel is slowly blocked and the grinding force decreases, this current will gradually increase. When the current is greater than the overload current set by the system (due to differences in equipment, the overload current is set to a multiple of the initial current), the XY manipulator assembly takes the dressing sand sheet. Since the first transverse drive 300 is set as a servo drive system, the grinding wheel can be dressed by hitting the grinding wheel back and forth with the dressing sand sheet to achieve a better dressing effect.

[0070] In one embodiment, the grinding wheel spindle box 900 is a variable frequency motor control type.

[0071] In the present invention, a dressing wheel is placed in the product tray 400. Through the arrangement of various components, when the dressing wheel is grabbed instead of the product, automatic dressing can be completed.

[0072] In this embodiment, the grinding wheel spindle box 900 adopts variable frequency speed control, and can switch different rotation directions and speeds according to grinding and dressing.

[0073] In one embodiment, the automatic CNC milling machine further includes a negative pressure system, which is connected to the sampling gripping part 510 , the flipping gripping part 610 and the lofting gripping part 721 .

[0074] In this embodiment, a negative pressure system is provided as the center for providing negative pressure. Specifically, the negative pressure system can match the solenoid valve system, and then control the sampling grabbing part 510, the flip grabbing part 610 and the lofting grabbing part 721 to complete the picking and placing action. The negative pressure system control can be integrated into the control system of the automatic CNC milling machine. The negative pressure of the negative pressure system can be generated by itself or connected to the external negative pressure.

[0075] Reference Figures 1 to 4In one embodiment, the flip gripping portion 610 is of a clamping type.

[0076] In this embodiment, considering the position accuracy, the flip gripper 610 is used as a relay to connect the sampling gripper 510 and the sample gripper 721, and the flip gripper 610 is a clamping type, so as to achieve the position accuracy. The driving source of the flip gripper 610 is a motor, air pressure or hydraulic pressure.

[0077] In summary, the cooperation of the XY manipulator assembly, the flip assembly, the swing arm assembly and the second lateral drive 800 realizes the automatic transfer of the product or the dressing wheel, without the need to install an additional grinding wheel dressing system, and realizes the uniform feed cutting with a constant cutting amount. When processing superhard materials such as sapphire and zirconia ceramics, it greatly reduces the clogging of the grinding wheel and avoids manual dressing of the grinding wheel. The working status of the first lateral drive 300 can also automatically determine whether the grinding wheel needs to be dressed, which is more intuitive and reliable.

[0078] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automatic CNC milling machine for superhard material milling, characterized in that: include: Base; A workpiece spindle box is mounted on the base and has a chuck at the output end; A first transverse drive drives the workpiece spindle box to move along the length direction of the base; A product tray mounted on the workpiece spindle box; An XY manipulator assembly comprises a sampling grabbing portion and a two-dimensional driving portion which is arranged on the workpiece spindle box and drives the sampling grabbing portion to move on a plane; A turning assembly, comprising a turning grabbing portion and a turning driving portion which is arranged on the workpiece spindle box and drives the turning grabbing portion to turn from horizontal to vertical; A swing arm assembly, comprising a rotary drive and a swing arm, wherein the output end of the rotary drive is arranged along the length direction of the base and drives the swing arm to rotate, and a lofting gripping portion is arranged at the free end of the swing arm, wherein the rotation range of the lofting gripping portion corresponds to the chuck and the flip gripping portion in a vertical state; A second lateral drive drives the swing arm assembly to move along the length direction of the base; A grinding wheel spindle box is arranged on the base and an output end of which corresponds to an output end of the workpiece spindle box; A control system is connected to control the workpiece spindle box, the first transverse drive, the XY manipulator assembly, the flip assembly, the swing arm assembly and the second transverse drive.

2. The automatic CNC milling machine for superhard material milling according to claim 1, characterized in that: The grinding wheel spindle box is fixed at an adjustable angle within the plane of the base.

3. The automatic CNC milling machine for superhard material milling according to claim 2, characterized in that: The grinding wheel spindle box is angle-adjusted in the plane of the base by a hand wheel drive.

4. The automatic CNC milling machine for superhard material milling according to claim 1, characterized in that: The position of the workpiece spindle box in the width direction of the base is adjustable.

5. The automatic CNC milling machine for superhard material milling according to claim 4, characterized in that: The position adjustment of the workpiece spindle box in the width direction of the base is driven by a hand wheel.

6. The automatic CNC milling machine for superhard material milling according to claim 1, characterized in that: The swing arm includes a first swing arm and a second swing arm bifurcated in the second transverse driving rotation plane.

7. The automatic numerically controlled milling machine for superhard material milling according to any one of claims 1 to 6, characterized in that: The first lateral drive is a servo drive system.

8. The automatic numerically controlled milling machine for superhard material milling according to any one of claims 1 to 6, characterized in that: The grinding wheel spindle box is of variable frequency motor control type.

9. The automatic numerically controlled milling machine for superhard material milling according to any one of claims 1 to 6, characterized in that: The automatic numerically controlled milling machine further comprises a negative pressure system connected to the sampling gripping part, the flipping gripping part and the lofting gripping part.

10. The automatic numerically controlled milling machine for superhard material milling according to any one of claims 1 to 6, characterized in that: The flip grabbing portion is of a clamping type.

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