Freezing surface grinding machine with numerical control precision rotary table

Abstract

The invention relates to the technical field of numerical control grinding machines, in particular to a numerical control precision rotary table freezing surface grinding machine which comprises a mounting base, a mounting stand column is arranged on the mounting base, and a double-spindle grinding mechanism capable of feeding up and down is arranged on the mounting stand column. The mounting base is provided with a workpiece limiting mechanism used for adjusting the grinding angle, a grinding cooling mechanism used for maintaining the flexibility and sealing performance of the suction cup and a workpiece conveying mechanism, and the workpiece limiting mechanism and the workpiece conveying mechanism are matched so that the grinding angle of the double-spindle grinding mechanism can be flexibly adjusted. By arranging the grinding and cooling mechanism, precise temperature control is conducted through the synergistic effect of cold airflow and hot airflow,-30 DEG C cold airflow generated by a vortex tube directly cools and grinds a high-temperature part, heat damage to a workpiece and a grinding wheel can be effectively avoided, and when the temperature of the workpiece is too low, hot airflow can be evenly diffused through an arc-shaped exhaust port; the flexibility and the sealing performance of the limiting suction cup can be maintained, and the workpiece can be prevented from generating stress deformation due to shock cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled grinding machines, in particular to a numerically controlled precision rotary table freezing surface grinder. Background Art

[0002] In the field of precision machining, surface grinders are widely used for surface and side grinding of high-precision workpieces. During the machining process, traditional mechanical fixtures will cause certain obstructions to the side of the workpiece, which will obviously have an adverse effect on the side grinding. Therefore, more and more surface grinders will use rubber suction cups to fix the workpiece from the bottom.

[0003] However, in the prior art, in the process of grinding the workpiece, in order to prevent local high temperature from damaging the grinding head and the workpiece, the surface grinder usually uses a refrigerant to quickly cool the grinding area while grinding. However, this will also cause the overall temperature of the workpiece to drop rapidly. The rapid drop in temperature of the contact surface between the workpiece and the suction cup will affect the flexibility and airtightness of the rubber suction cup, thereby causing the workpiece to loosen during the grinding process. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a CNC precision turntable freezing surface grinder, which solves the technical problem that the surface grinder in the existing technology will affect the flexibility and air tightness of the rubber suction cup during the cooling process of the workpiece, thereby causing the workpiece to loosen. It has the advantage of being able to effectively maintain the flexibility and air tightness of the suction cup during the cooling process.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a CNC precision turntable frozen surface grinder, comprising a mounting base, a mounting column is provided on the mounting base, a dual-spindle grinding mechanism capable of feeding up and down is provided on the mounting column, the mounting base is provided with a workpiece limiting mechanism for adjusting the grinding angle, a grinding cooling mechanism for maintaining the flexibility and sealing of the suction cup, and a workpiece conveying mechanism, the workpiece limiting mechanism and the workpiece conveying mechanism cooperate to flexibly adjust the grinding angle of the dual-spindle grinding mechanism, and the grinding cooling mechanism can keep the workpiece limiting mechanism warm while cooling the dual-spindle grinding mechanism.

[0006] Preferably, the workpiece limiting mechanism includes a grinding platform arranged on a mounting base, a mounting cavity is opened in the middle of the grinding platform, a hydraulic push rod is fixedly installed inside the mounting cavity, a limiting suction cup is detachably installed on the hydraulic push rod, and a one-way exhaust valve is provided on the limiting suction cup. When the hydraulic push rod is extended upward, the limiting suction cup will be fixedly connected to the bottom of the workpiece body, and then the workpiece body will move synchronously with the grinding platform.

[0007] Preferably, the grinding and cooling mechanism includes a jet cooling assembly fixedly mounted on the dual-spindle grinding mechanism, a number of arc-shaped exhaust ports are provided at equal intervals on the grinding platform, an air intake pipe is fixedly mounted on the lower end of the grinding platform, one end of the air intake pipe is connected to the arc-shaped exhaust port, and the other end of the air intake pipe is fixedly connected to a heat-resistant hose, a temperature sensor is provided inside the limiting suction cup, and after the limiting suction cup is tightly fitted to the workpiece body, the temperature sensor will measure the lower surface temperature of the workpiece body in real time, and when the temperature continues to drop, the output power of the electric blower will increase accordingly, thereby maintaining the temperature around the limiting suction cup.

[0008] Preferably, the workpiece conveying mechanism includes a horizontal guide rail fixedly mounted on the mounting base, a sliding platform movably mounted on the horizontal guide rail, a feed screw and a drive motor are arranged between the two horizontal guide rails, a plurality of elliptical through grooves are opened at equal intervals on the mounting base, a debris storage box is detachably mounted on the lower end of the mounting base, a fixed protrusion which cooperates with the thread of the feed screw is provided at the lower end of the sliding platform, a rubber scraper is fixedly mounted on the fixed protrusion, and when the feed screw rotates under the action of the drive motor, the fixed protrusion and the sliding platform will move horizontally, thereby conveying the workpiece horizontally.

[0009] Preferably, a micro motor for driving the limiting suction cup to rotate is fixedly mounted on the upper end of the hydraulic push rod. When the micro motor operates under the action of the PLC controller, the limiting suction cup is rotated.

[0010] Preferably, the jet cooling assembly includes a cooling duct fixedly mounted on the dual-spindle grinding mechanism, with an air jet nozzle fixedly mounted at the end of the cooling duct. The cooling duct is connected to a vortex tube capable of generating a cold airflow. During the grinding process, an external air compressor and vortex tube compress air to generate a cold airflow (the cold end outlet temperature can reach -30°C), which is discharged through the air jet nozzle, thereby cooling the grinding area of the workpiece.

[0011] Preferably, an electric blower is fixedly installed at the lower end of the mounting base, and the output end of the electric blower is connected to a heat-resistant hose. The length of the heat-resistant hose is greater than half the length of the mounting base. When the electric blower works under the action of the PLC controller, hot air will be filled into the interior of the air intake pipe through the heat-resistant hose, and then the hot air will be ejected through the arc-shaped exhaust port.

[0012] Preferably, the grinding platform is fixedly connected to the sliding platform, the debris storage box is located below the elliptical groove, and the rubber scraper is in contact with the mounting base. When the sliding platform moves horizontally, the rubber scraper will push the debris between the two horizontal guide rails into the interior of the debris storage box through the elliptical groove.

[0013] Preferably, the dual-spindle grinding mechanism includes a first slide rail and a second slide rail vertically arranged on the mounting column, a side grinding assembly is movably mounted on the first slide rail, and a surface grinding assembly is movably mounted on the second slide rail. The mounting column is respectively provided with a screw drive assembly for driving the side grinding assembly and the surface grinding assembly to feed up and down. When the side grinding assembly and the surface grinding assembly are powered on, they will grind the side and upper surface of the workpiece body respectively.

[0014] Preferably, the screw drive assembly includes a vertical screw, a lifting motor and a bevel gear box. When the lifting motor is powered on, the bevel gear box is used to cause the vertical screw to rotate around its own axis.

[0015] By means of the above technical solution, the present invention provides a CNC precision rotary table frozen surface grinder, which has at least the following beneficial effects:

[0016] 1. The present invention sets a grinding cooling mechanism and uses the synergistic effect of hot and cold airflows to achieve precise temperature control. The -30°C cold airflow generated by the vortex tube directly cools the high-temperature parts of the grinding process, which can effectively avoid thermal damage to the workpiece and the grinding wheel. When the workpiece temperature is too low, the hot airflow will diffuse evenly through the arc-shaped exhaust port, which can not only maintain the flexibility and sealing of the limit suction cup, but also prevent the workpiece from stress deformation due to sudden cooling.

[0017] 2. The present invention sets a grinding and cooling mechanism and adopts a flexible fixing method of limiting suction cups and temperature-controlled airflow. After processing is completed, the suction cups can automatically separate, ensuring adsorption stability while also achieving one-click loosening, significantly improving the material replacement efficiency. The hot air flow distribution of the arc-shaped exhaust port design can avoid the leakage problem caused by low-temperature hardening of traditional vacuum suction cups.

[0018] 3. The present invention sets up a dual-spindle grinding mechanism and utilizes the mutual cooperation between the side grinding assembly and the surface grinding assembly to grind the side and upper surface of the workpiece at the same time, which significantly improves the processing efficiency. Moreover, the grinding assembly can be flexibly moved along the Z axis to adapt to the processing requirements of workpieces of different sizes. It is suitable for high-precision and high-efficiency plane and side grinding.

[0019] 4. The present invention sets a workpiece limiting mechanism, utilizes the mutual cooperation between the limiting suction cup and the micro motor, and adopts a dual design of negative pressure adsorption and rotation drive. It not only solves the problem that traditional mechanical clamping may damage the workpiece surface, but also realizes the dynamic optimization of the processing process. It is especially suitable for grinding scenarios of high-precision or special-shaped workpieces.

[0020] 5. The present invention sets a workpiece limiting mechanism and uses a hydraulic push rod to drive the limiting suction cup to fit tightly with the bottom of the workpiece, which can not only ensure that the workpiece is not displaced or loosened during the grinding process, but also simplify the positioning process, reduce manual calibration time, and effectively improve operational efficiency.

[0021] 6. The present invention sets up a workpiece conveying mechanism and utilizes the mutual cooperation between the feeding screw and the driving motor. The sliding platform can flexibly adjust the position of the workpiece to meet the multi-angle grinding requirements of special-shaped workpieces, effectively improving the processing adaptability. Moreover, after the processing is completed, the workpiece can be automatically moved out of the grinding area to avoid contact with the high-speed rotating grinding head when manually removing the workpiece, thereby significantly improving operational safety.

[0022] 7. The present invention provides a workpiece conveying mechanism and utilizes the mutual cooperation between the fixed protrusion and the rubber scraper to effectively prevent debris from accumulating between the two horizontal guide rails, reduce mechanical wear and motion interference, and improve the long-term operation stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 The three-dimensional structure of the overall structure of the present invention Figure 1 ;

[0025] Figure 2 Schematic diagram of the structure of the dual-spindle grinding mechanism of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the polishing platform in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the installation cavity in the present invention;

[0028] Figure 5 Schematic diagram of the structure of the workpiece limiting mechanism in the present invention;

[0029] Figure 6 Schematic diagram of the structure of the air intake pipe in the present invention;

[0030] Figure 7 Schematic diagram of the structure of the jet cooling assembly in the present invention;

[0031] Figure 8 Schematic diagram of the structure of the workpiece conveying mechanism of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the fixed protrusion in the present invention.

[0033] In the figure: 1. Mounting base; 2. Mounting column; 3. Dual-spindle grinding mechanism; 301. First slide rail; 302. Second slide rail; 303. Side grinding assembly; 304. Surface grinding assembly; 305. Screw drive assembly; 4. Workpiece body; 5. Workpiece limiting mechanism; 501. Grinding platform; 502. Mounting cavity; 503. Hydraulic push rod; 504. Limiting suction cup; 505. One-way exhaust valve; 506. Micro motor; 6. Grinding cooling mechanism; 601. Jet cooling assembly; 602. Arc exhaust port; 603. Air intake duct; 604. Heat-resistant hose; 605. Temperature sensor; 7. Workpiece conveying mechanism; 701. Horizontal guide rail; 702. Sliding platform; 703. Feeding screw; 704. Drive motor; 705. Elliptical through groove; 706. Debris storage box; 707. Fixed bump; 708. Rubber scraper. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] In the process of grinding workpieces, in the existing surface grinder, in order to prevent local high temperature from damaging the grinding head and workpiece, refrigerants are usually used to quickly cool the grinding area during grinding. However, this will also cause the overall temperature of the workpiece to drop rapidly. The rapid drop in the temperature of the contact surface between the workpiece and the suction cup will affect the flexibility and airtightness of the rubber suction cup, thereby causing the workpiece to loosen. In order to solve this technical defect in the existing technology, Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 as well as Figure 7 As shown, this embodiment proposes a CNC precision turntable frozen surface grinder, which can effectively avoid thermal damage to the workpiece and the grinding wheel, and prevent stress deformation of the workpiece due to sudden cooling. The surface grinder includes a mounting base 1, a mounting column 2 is provided on the mounting base 1, and a dual-spindle grinding mechanism 3 that can feed up and down is provided on the mounting column 2. The mounting base 1 is provided with a workpiece limiting mechanism 5 for adjusting the grinding angle, a grinding cooling mechanism 6 for maintaining the flexibility and sealing of the suction cup, and a workpiece conveying mechanism 7. The workpiece limiting mechanism 5 and the workpiece conveying mechanism 7 can cooperate to flexibly adjust the grinding angle of the dual-spindle grinding mechanism 3, and the grinding cooling mechanism 6 can keep the workpiece limiting mechanism 5 warm while cooling the dual-spindle grinding mechanism 3.

[0037] Specifically, the grinding cooling mechanism 6 includes a jet cooling assembly 601 fixedly mounted on the dual-spindle grinding mechanism 3, and the jet cooling assembly 601 includes a cooling air duct fixedly mounted on the dual-spindle grinding mechanism 3, and an air nozzle is fixedly mounted on the end of the cooling air duct, and the cooling air duct is connected to a vortex tube capable of generating a cold air flow. During the grinding process, the external air compressor and the vortex tube will compress the air to generate a cold air flow (the cold end outlet temperature can reach -30°C), and the cold air flow will be discharged through the air nozzle, thereby cooling the grinding part of the workpiece body 4. A number of arc-shaped exhaust ports 602 are provided at equal intervals on the grinding platform 501, and an air intake pipe 603 is fixedly mounted on the lower end of the grinding platform 501. One end of the air intake pipe 603 is connected to the arc-shaped exhaust port 602, and the air intake pipe 603 is The other end is fixedly connected to a heat-resistant hose 604, and an electric blower is fixedly installed at the lower end of the mounting base 1. The output end of the electric blower is connected to the heat-resistant hose 604. The length of the heat-resistant hose 604 is greater than half the length of the mounting base 1. When the electric blower works under the action of the PLC controller, hot air will be filled into the interior of the air inlet pipe 603 through the heat-resistant hose 604. Next, the hot air will be ejected through the arc-shaped exhaust port 602. A temperature sensor 605 is provided inside the limiting suction cup 504. After the limiting suction cup 504 is tightly fitted with the workpiece body 4, the temperature sensor 605 will measure the lower surface temperature of the workpiece body 4 in real time. When the temperature continues to drop, the output power of the electric blower will increase, thereby maintaining the temperature around the limiting suction cup 504.

[0038] According to the above content, during the grinding process, the external air compressor and vortex tube will compress the air to produce a cold air flow. Then, the cold air flow will be ejected toward the grinding site through the cooling air duct and air nozzle, thereby quickly cooling the processing part during the grinding process, which can effectively prevent the grinding wheel and workpiece from being damaged due to high temperature.

[0039] At the same time, the temperature sensor 605 (using a patch sensor) will monitor the temperature of the lower surface of the workpiece body 4 in real time. When the temperature of the lower surface of the workpiece drops too quickly, the electric blower will immediately blow hot air into the interior of the heat-resistant hose 604. Next, the hot air will quickly pass through the air intake pipe 603 and multiple arc-shaped exhaust ports 602 and be discharged upward. After the hot air is discharged, the lower surface of the workpiece body 4 will be locally heated, thereby ensuring the flexibility and sealing of the limiting suction cup 504 as much as possible to avoid air leakage.

[0040] After the grinding process is completed, the hydraulic push rod 503 will automatically retract downward, thereby separating the limiting suction cup 504 from the workpiece, and then the staff can directly take out the workpiece.

[0041] This embodiment sets up a grinding cooling mechanism 6 and uses the synergistic effect of hot and cold airflows to perform precise temperature control. The -30°C cold airflow generated by the vortex tube directly cools the high-temperature grinding parts, which can effectively avoid thermal damage to the workpiece and the grinding wheel. When the temperature of the workpiece is too low, the hot airflow will diffuse evenly through the arc-shaped exhaust port 602, which can not only maintain the flexibility and sealing of the limiting suction cup 504, but also prevent the workpiece from stress deformation due to sudden cooling. In addition, this embodiment sets up a grinding cooling mechanism 6 and adopts a flexible fixing method of the limiting suction cup 504 in conjunction with the temperature-controlled airflow. After the processing is completed, the suction cup can be automatically separated, and one-button loosening can be achieved while ensuring the adsorption stability, which significantly improves the material replacement efficiency. The hot airflow distribution designed by the arc-shaped exhaust port 602 can avoid the leakage problem caused by low-temperature hardening of traditional vacuum suction cups.

[0042] Example 2

[0043] In order to grind the side and top surfaces of the workpiece at the same time and improve the processing efficiency, Figure 1 、 Figure 2 as well as Figure 8 As shown, on the basis of Example 1, this embodiment is provided with a dual-spindle grinding mechanism 3. Specifically, the dual-spindle grinding mechanism 3 includes a first slide rail 301 and a second slide rail 302 vertically arranged on the mounting column 2. A side grinding assembly 303 is movably installed on the first slide rail 301, and a surface grinding assembly 304 is movably installed on the second slide rail 302. The mounting column 2 is respectively provided with a screw drive assembly 305 for driving the side grinding assembly 303 and the surface grinding assembly 304 to feed up and down. When the side grinding assembly 303 and the surface grinding assembly 304 are powered on, they will grind the side and upper surface of the workpiece body 4 respectively. The screw drive assembly 305 includes a vertical screw, a lifting motor and a bevel gear box. When the lifting motor is powered on, the vertical screw will rotate around its own axis through the bevel gear box.

[0044] According to the above content, after the workpiece conveying mechanism 7 moves the workpiece body 4 to the specified position, the side grinding assembly 303 (adopting an electric spindle design, driven by a 12KW motor, a rated speed of 3000rpm, a grinding wheel diameter (Ф300), and a grinding head spindle runout ≤0.002mm) will move up and down under the action of the screw drive assembly 305, and the side of the workpiece body 4 will be ground during the movement.

[0045] At the same time, the surface grinding assembly 304 (power 12Kw, rated 3000rpm, grinding wheel diameter (Ф300), grinding head spindle runout ≤0.003mm) will grind the upper surface of the workpiece body 4, thereby completing the concentric circle or fine grinding end surface grinding.

[0046] This embodiment provides a dual-spindle grinding mechanism 3 and utilizes the mutual cooperation between the side grinding component 303 and the surface grinding component 304 to simultaneously grind the side and upper surface of the workpiece, thereby significantly improving the processing efficiency. Moreover, the grinding component can be flexibly moved along the Z axis to adapt to the processing requirements of workpieces of different sizes, and is suitable for high-precision and high-efficiency plane and side grinding.

[0047] Example 3

[0048] In order to avoid blocking the side of the workpiece during the process of fixing the workpiece and affecting the grinding process, based on the above embodiment, as Figures 1-6 As shown, this embodiment is provided with a workpiece limiting mechanism 5. Specifically, the workpiece limiting mechanism 5 includes a grinding platform 501 arranged on the mounting base 1. A mounting cavity 502 is opened in the middle of the grinding platform 501. A hydraulic push rod 503 is fixedly installed inside the mounting cavity 502. A limiting suction cup 504 is detachably installed on the hydraulic push rod 503. A one-way exhaust valve 505 is provided on the limiting suction cup 504. When the hydraulic push rod 503 is extended upward, the limiting suction cup 504 is fixedly connected to the bottom of the workpiece body 4. Next, the workpiece body 4 will move synchronously with the grinding platform 501. A micro motor 506 for driving the limiting suction cup 504 to rotate is fixedly installed on the upper end of the hydraulic push rod 503. When the micro motor 506 is operated under the action of the PLC controller, the limiting suction cup 504 will rotate.

[0049] According to the above content, when using the grinding machine, the staff will first place the workpiece body 4 on the grinding platform 501 and try to ensure that the workpiece body 4 and the grinding platform 501 are in a concentric state.

[0050] Then press the workpiece body 4 with your hand. At the same time, the hydraulic push rod 503 will extend upward to make the limiting suction cup 504 contact with the bottom of the workpiece body 4. Next, as the limiting suction cup 504 is continuously squeezed, the gas inside the limiting suction cup 504 will be discharged outward from the one-way exhaust valve 505, so that the limiting suction cup 504 and the bottom of the workpiece body 4 are tightly adsorbed together.

[0051] Furthermore, during the grinding process, the limiting suction cup 504 can rotate slowly under the drive of the micro motor 506 , and the rotation of the limiting suction cup 504 will drive the workpiece body 4 to rotate synchronously, thereby automatically adjusting the grinding position and grinding angle.

[0052] This embodiment sets a workpiece limiting mechanism 5, utilizes the mutual cooperation between the limiting suction cup 504 and the micro motor 506, and adopts a dual design of negative pressure adsorption and rotation drive, which not only solves the problem that traditional mechanical clamping may damage the workpiece surface, but also realizes dynamic optimization of the processing process, which is particularly suitable for grinding scenarios of high-precision or special-shaped workpieces; moreover, this embodiment sets a workpiece limiting mechanism 5, utilizes the hydraulic push rod 503 to drive the limiting suction cup 504 to fit tightly with the bottom of the workpiece, which can not only ensure that the workpiece is not displaced or loosened during the grinding process, but also simplifies the positioning process, reduces manual calibration time, and can effectively improve operating efficiency.

[0053] Example 4

[0054] In order to meet the multi-angle grinding requirements of special-shaped workpieces and improve the processing adaptability of the grinding machine, based on the above embodiment, Figure 2 、 Figure 8 as well as Figure 9 As shown, this embodiment is provided with a workpiece conveying mechanism 7. Specifically, the workpiece conveying mechanism 7 includes a horizontal guide rail 701 fixedly mounted on the mounting base 1, a sliding platform 702 is movably mounted on the horizontal guide rail 701, the grinding platform 501 is fixedly connected to the sliding platform 702, a chip storage box 706 is located below the elliptical through groove 705, a feeding screw 703 and a drive motor 704 are provided between the two horizontal guide rails 701, a plurality of elliptical through grooves 705 are opened at equal intervals on the mounting base 1, and a chip storage box 706 is detachably mounted on the lower end of the mounting base 1 The lower end of the sliding platform 702 is provided with a fixed protrusion 707 that is threadedly engaged with the feeding screw 703. A rubber scraper 708 is fixedly installed on the fixed protrusion 707. When the feeding screw 703 rotates under the action of the driving motor 704, the fixed protrusion 707 and the sliding platform 702 will move horizontally, thereby transporting the workpiece horizontally. The rubber scraper 708 contacts the mounting base 1. When the sliding platform 702 moves horizontally, the rubber scraper 708 will push the debris between the two horizontal guide rails 701 through the elliptical groove 705 to the inside of the debris storage box 706.

[0055] According to the above content, during the grinding process, the sliding platform 702 can move horizontally under the action of the feed screw 703, and the positions of the grinding platform 501 and the workpiece body 4 will change when the sliding platform 702 moves.

[0056] When the position of the grinding platform 501 changes, the distance between the workpiece body 4 and the grinding head will also change, thereby meeting the processing requirements of special-shaped workpieces.

[0057] After the grinding process is completed, the sliding platform 702 can transfer the workpiece to both sides of the mounting base 1, thereby making it easier for workers to pick up the workpiece and preventing their hands from coming into contact with the grinding head when picking up the workpiece.

[0058] Moreover, during the horizontal movement of the sliding platform 702 , the rubber scraper 708 will push the debris that falls between the two horizontal guide rails 701 into the interior of the debris storage box 706 , thereby preventing the accumulation of debris and interference with the movement of the sliding platform 702 .

[0059] In this embodiment, a workpiece conveying mechanism 7 is provided, and the cooperation between the feed screw 703 and the drive motor 704 is utilized. The sliding platform 702 can flexibly adjust the position of the workpiece to meet the multi-angle grinding requirements of special-shaped workpieces, thereby effectively improving the processing adaptability. Moreover, after the processing is completed, the workpiece can be automatically moved out of the grinding area to avoid contact with the high-speed rotating grinding head when manually removing the workpiece, thereby significantly improving the operational safety. In addition, in this embodiment, a workpiece conveying mechanism 7 is provided, and the cooperation between the fixed protrusion 707 and the rubber scraper 708 is utilized, thereby effectively avoiding the accumulation of debris between the two horizontal guide rails 701, reducing mechanical wear and motion interference, and improving the long-term operation stability of the equipment.

[0060] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A CNC precision rotary table frozen surface grinder, comprising a mounting base (1), a mounting column (2) provided on the mounting base (1), a dual-spindle grinding mechanism (3) capable of feeding up and down provided on the mounting column (2), characterized in that: The mounting base (1) is provided with a workpiece limiting mechanism (5) for adjusting the grinding angle, a workpiece conveying mechanism (7), and a grinding cooling mechanism (6) for maintaining the flexibility and sealing of the suction cup. The workpiece limiting mechanism (5) and the workpiece conveying mechanism (7) cooperate to flexibly adjust the grinding angle of the dual-spindle grinding mechanism (3). The grinding cooling mechanism (6) can keep the workpiece limiting mechanism (5) warm while cooling the dual-spindle grinding mechanism (3).

2. The CNC precision rotary table frozen surface grinder according to claim 1, characterized in that: The workpiece limiting mechanism (5) comprises a grinding platform (501) arranged on the workpiece conveying mechanism (7); a mounting cavity (502) is provided in the middle of the grinding platform (501); a hydraulic push rod (503) is fixedly installed inside the mounting cavity (502); a limiting suction cup (504) is detachably mounted on the hydraulic push rod (503); and a one-way exhaust valve (505) is provided on the limiting suction cup (504).

3. The CNC precision rotary table frozen surface grinder according to claim 2, characterized in that: The grinding and cooling mechanism (6) comprises an air jet cooling assembly (601) fixedly mounted on the dual-spindle grinding mechanism (3); a plurality of arc-shaped exhaust ports (602) are provided on the grinding platform (501) at equal intervals; and an air intake pipe (603) is fixedly mounted at the lower end of the grinding platform (501).

4. The CNC precision rotary table frozen surface grinder according to claim 3, characterized in that: The jet cooling assembly (601) comprises a cooling air duct fixedly mounted on the dual-spindle grinding mechanism (3), an air jet nozzle fixedly mounted at the end of the cooling air duct, and the cooling air duct is connected to a vortex tube capable of generating a cold air flow.

5. The CNC precision rotary table frozen surface grinder according to claim 3, characterized in that: One end of the air intake pipe (603) is connected to the arc-shaped exhaust port (602), and the other end of the air intake pipe (603) is fixedly connected to a heat-resistant hose (604). A temperature sensor (605) is provided inside the limiting suction cup (504). An electric blower is fixedly installed at the lower end of the mounting base (1), and the output end of the electric blower is connected to the heat-resistant hose (604). The length of the heat-resistant hose (604) is greater than half the length of the mounting base (1).

6. The CNC precision rotary table frozen surface grinder according to claim 2, characterized in that: The workpiece conveying mechanism (7) comprises a horizontal guide rail (701) fixedly mounted on a mounting base (1); a sliding platform (702) is movably mounted on the horizontal guide rail (701); a feed screw (703) and a drive motor (704) are arranged between the two horizontal guide rails (701); a plurality of elliptical through grooves (705) are provided at equal intervals on the mounting base (1); a debris storage box (706) is detachably mounted on the lower end of the mounting base (1); a fixed protrusion (707) threadedly engaged with the feed screw (703) is provided at the lower end of the sliding platform (702); and a rubber scraper (708) is fixedly mounted on the fixed protrusion (707).

7. The CNC precision rotary table frozen surface grinder according to claim 6, characterized in that: The grinding platform (501) is fixedly connected to the sliding platform (702), the debris storage box (706) is located below the elliptical through groove (705), and the rubber scraper (708) is in contact with the mounting base (1).

8. The CNC precision rotary table frozen surface grinder according to claim 2, characterized in that: A micro motor (506) for driving the limiting suction cup (504) to rotate is fixedly mounted on the upper end of the hydraulic push rod (503).

9. The CNC precision rotary table frozen surface grinder according to claim 1, characterized in that: The dual-spindle grinding mechanism (3) comprises a first slide rail (301) and a second slide rail (302) vertically arranged on the mounting column (2); a side grinding assembly (303) is movably mounted on the first slide rail (301); a surface grinding assembly (304) is movably mounted on the second slide rail (302); and a screw drive assembly (305) for driving the side grinding assembly (303) and the surface grinding assembly (304) to feed up and down is respectively provided on the mounting column (2).

10. The CNC precision rotary table frozen surface grinder according to claim 9, characterized in that: The screw drive assembly (305) includes a vertical screw, a lifting motor and a bevel gear box.

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