Heavy duty high speed machine tool

Abstract

The application discloses a heavy-duty high-speed machine tool, and belongs to the technical field of machine tool machining. The heavy-duty machine tool is provided with a machine box on a moving sliding seat. A main shaft is non-contact arranged in the machine box. The two ends of the main shaft are rotatably installed with the machine box through connecting shafts and tool shafts. The application further comprises a liquid cooling assembly, which comprises a cooling sleeve arranged outside the main shaft. The two ends of the cooling sleeve are fixedly installed with the top wall and the bottom wall of the inner cavity of the machine box. A spiral flow channel is formed in the inner wall of the cooling sleeve. The top end and the bottom end of the spiral flow channel are respectively provided with a liquid inlet pipe and a liquid outlet pipe. The application can realize cooling and temperature reduction of the main shaft during high-speed operation, effectively control the temperature rise and thermal deformation of the main shaft during high-speed operation, and realize mirror-level precision machining of local areas of heavy workpieces without sacrificing heavy-load rigidity.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, and more specifically, to a heavy-duty high-speed machine tool. Background Technology

[0002] Most existing heavy-duty machine tool spindle drive systems use belt drives, where the motor drives the spindle via a belt and pulley. While this method can provide a large driving torque to meet the demands of heavy cutting, its speed is limited by the inherent characteristics of belt drives. Belts are prone to slippage, vibration, and overheating at high speeds, making it difficult for the spindle to reach maximum speeds of several thousand revolutions per minute. This fails to meet the high linear speed requirements for mirror-finish machining of workpieces. Currently, for large, heavy workpieces that cannot be transferred to precision machine tools, the spindle speeds of existing heavy-duty machine tools cannot meet the linear speed requirements for achieving mirror-level precision in certain areas.

[0003] With the development of high-speed motor technology, some machine tools have begun to try to connect the motor directly to the spindle to increase the speed. However, the spindle system of heavy machine tools has a large mass and inertia. When switching from low-speed mode to high-speed operation, the spindle support bearing generates severe frictional heat. At the same time, the heat generated by the motor itself is also transferred to the spindle through the shaft end, resulting in a sharp increase in the overall temperature rise of the spindle, producing significant thermal elongation and thermal deformation, and the machining accuracy actually decreases. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a heavy-duty high-speed machine tool that can achieve cooling and temperature reduction during high-speed spindle operation, effectively control the temperature rise and thermal deformation of the spindle during high-speed operation, and enable the heavy-duty machine tool to perform mirror-level precision machining on local areas of heavy workpieces without sacrificing heavy-load rigidity.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A heavy-duty high-speed machine tool includes a heavy-duty machine tool, a housing is mounted on the movable slide of the heavy-duty machine tool, a spindle is non-contactly disposed inside the housing, and the two ends of the spindle are rotatably mounted to the housing via a connecting shaft and a tool shaft, respectively. Also includes: A liquid cooling assembly includes a cooling sleeve disposed on the outside of the spindle. The two ends of the cooling sleeve are fixedly installed to the top and bottom walls of the inner cavity of the chassis, respectively. A spiral flow channel is formed on the inner wall of the cooling sleeve. An inlet pipe and an outlet pipe are respectively provided at the top and bottom of the spiral flow channel. The other ends of the inlet pipe and the outlet pipe pass through the cooling sleeve and the chassis and extend to the outside of the chassis. The inner ends of the inlet pipe and the outlet pipe are directly facing the spiral path of the spiral flow channel. The upper side of the chassis also includes an air-cooling assembly, which is used to force air cooling of the outer wall of the cooling sleeve.

[0007] Furthermore, the air-cooling assembly includes a top seat fixed to the top of the chassis, a sleeve frame fixedly installed at the bottom end of the top seat, a centrifugal impeller rotatably installed inside the sleeve frame, and interconnected air outlet pipes evenly fixedly installed on the outer side of the sleeve frame. The other end of each set of air outlet pipes passes through the chassis and extends into the chassis. A motor is fixedly installed on the top of the top seat, and the output shaft of the motor passes through the centrifugal impeller and is fixedly installed at the top end of the connecting shaft, which is located at the air inlet end of the centrifugal impeller. The bottom wall of the chassis is thickened, and a cavity is formed inside the bottom wall of the chassis. The inner wall of the inner cavity of the chassis is uniformly provided with internal flow channels that communicate with the cavity.

[0008] Furthermore, a circular frame is rotatably installed inside the chassis. The circular frame is located outside the cooling sleeve. A lever is uniformly fixedly installed on the top of the circular frame. The bottom end of each group of air outlet pipes is directly opposite the adjacent lever. A lever is uniformly fixedly installed on the inner wall of the circular frame.

[0009] Furthermore, axial flow impellers are uniformly installed on the shaft wall of the tool shaft, and each group of axial flow impellers is located in the cavity. Exhaust pipes are uniformly fixedly installed at the bottom of the chassis, and the top of each group of exhaust pipes penetrates the bottom wall of the chassis and communicates with the cavity.

[0010] Furthermore, a circular frame is fitted on the outer side of each group of exhaust pipes, and a circular groove adapted to the exhaust pipe is opened on the top of the circular frame. The circular frame is rotatably installed on the bottom of the chassis, and a second lever is evenly fixedly installed on the bottom wall of the inner cavity of the circular frame. The bottom end of each group of exhaust pipes is directly facing the adjacent second lever.

[0011] Furthermore, ball-head tubes are evenly installed at the bottom of the circular frame, and a ball-head seat is rotatably installed at the bottom end of each group of ball-head tubes. A bamboo-joint tube is installed at the other end of each group of ball-head seats.

[0012] Furthermore, the outer wall of the cooling sleeve is uniformly fitted with fins, and each set of levers extends between two adjacent fins.

[0013] Furthermore, a stepped flange is detachably installed at the bottom of the chassis, and the tool shaft is rotatably mounted to the stepped flange.

[0014] Furthermore, a fixing sleeve is fixedly installed at the bottom end of the stepped flange, and a tool holder assembly is rotatably installed inside the fixing sleeve. The tool holder assembly is fixedly installed at the bottom end of the tool shaft.

[0015] Furthermore, the bottom ends of the air outlet pipe and the exhaust pipe are located on the top upper side of the first and second dial plates, respectively.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention achieves spiral cooling of the entire spindle by the coolant flowing in a spiral channel in the inner wall of the cooling sleeve and filling the gap between the cooling sleeve and the spindle, so that the coolant is in full contact with the outer wall of the spindle and flows continuously along the spiral path, effectively controlling the overall temperature rise and thermal deformation of the spindle and ensuring the accuracy and stability of the spindle under high speed rotation.

[0017] (2) The present invention uses a centrifugal impeller that rotates synchronously with the motor output shaft to draw in air axially from the bottom opening end and throw the gas radially out and pressurize it before discharging it between the casing and the cooling sleeve to force air cooling of the outer wall of the cooling sleeve. At the same time, the airflow path passes through the outside of the connecting shaft and the motor output shaft to pre-cool the key parts on the heat conduction path, so as to achieve adaptive matching between heat dissipation intensity and spindle speed, and ensure that the heat exchange efficiency of the liquid cooling component remains at a high level.

[0018] (3) The present invention drives the dial plate, drive the circular frame and the lever to rotate continuously by the gas flow, which continuously stirs the gas on the outer wall of the cooling sleeve, disperses the airflow and improves its circumferential distribution uniformity, effectively breaks the dead zone of the airflow and the laminar boundary layer, significantly increases the contact frequency and heat exchange area between the gas and the outer wall of the cooling sleeve and the fins, and significantly enhances the convective heat exchange effect of the air-cooled component.

[0019] (4) The present invention uses an axial flow impeller to rotate synchronously with the tool shaft to actively draw gas between the machine box and the cooling sleeve, so that the entire air cooling channel forms a complete negative pressure closed loop from top to bottom, ensuring that the airflow has sufficient velocity and flow rate; at the same time, the extracted gas is guided to the tool processing area through the exhaust pipe and bamboo joint pipe to perform a rotating and uniform blowing on the workpiece surface processing position, thereby achieving auxiliary cooling and chip removal. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of a local structure in the middle; Figure 3 For the present invention Figure 2 The first sectional view; Figure 4 For the present invention Figure 2 The second sectional view; Figure 5 For the present invention Figure 2 The third sectional view; Figure 6 For the present invention Figure 2 A bottom view.

[0021] Explanation of the labels in the diagram: 1. Heavy-duty machine tool; 101. Chassis; 102. Spindle; 103. Connecting shaft; 104. Tool shaft; 105. Stepped flange; 106. Fixing sleeve; 107. Tool holder assembly; 108. Top mount; 109. Motor; 2. Cooling sleeve; 201. Spiral flow channel; 202. Liquid inlet pipe; 203. Liquid outlet pipe; 204. Fins; 3. Frame; 301. Centrifugal impeller; 302. Air outlet pipe; 310. Cavity; 311. Axial flow impeller; 312. Internal flow channel; 313. Exhaust pipe; 4. Circular frame; 401. Dial plate one; 402. Dial lever; 410. Circular frame; 411. Dial plate two; 412. Ball head tube; 413. Ball head seat; 414. Bamboo joint tube; 415. Circular groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 6 A heavy-duty high-speed machine tool includes a heavy-duty machine tool 1. A housing 101 is mounted on a movable slide of the heavy-duty machine tool 1. A spindle 102 is non-contactly disposed inside the housing 101. The two ends of the spindle 102 are rotatably mounted to the housing 101 via a connecting shaft 103 and a tool shaft 104, respectively. Also includes: The liquid cooling assembly includes a cooling sleeve 2 disposed on the outside of the spindle 102. The two ends of the cooling sleeve 2 are fixedly installed to the top and bottom walls of the inner cavity of the housing 101, respectively. A spiral flow channel 201 is provided on the inner wall of the cooling sleeve 2. An inlet pipe 202 and an outlet pipe 203 are respectively provided at the top and bottom ends of the spiral flow channel 201. The other ends of the inlet pipe 202 and the outlet pipe 203 pass through the cooling sleeve 2 and the housing 101 and extend to the outside of the housing 101. The inner ends of the inlet pipe 202 and the outlet pipe 203 are directly facing the spiral path of the spiral flow channel 201. The upper side of the chassis 101 also includes an air-cooling assembly, which is used to force air cooling of the outer wall of the cooling sleeve 2.

[0024] By adopting the above technical solution, the outer ends of both the inlet pipe 202 and the outlet pipe 203 are connected to an external coolant circulation treatment device. During operation, the spindle 102, connecting shaft 103, and tool shaft 104 rotate at high speed, and the connecting shaft 103 and tool shaft 104 gradually heat up, transferring the temperature to the spindle 102. Simultaneously, the coolant circulation treatment device delivers coolant to the inlet pipe 202. The inner end of the inlet pipe 202 is directly aligned with the beginning of the spiral flow channel 201, allowing the coolant to enter tangentially along the spiral direction of the spiral flow channel 201, thus providing a stable spiral flow guide for the coolant. At this time, the coolant flows spirally downwards along the spiral flow channel 201, and some coolant is discharged between the cooling sleeve 2 and the spindle 102. The gap between the two is filled, and the coolant flows downward in a spiral in the cooling sleeve 2. Finally, it is discharged into the outlet pipe 203 through the bottom end of the spiral flow channel 201. The coolant in the outlet pipe 203 will be discharged back into the coolant circulation treatment device to cool the spindle 102. The spindle 102 will also conduct low temperature to the connecting shaft 103 and the tool shaft 104 to achieve synchronous cooling. The overall spiral cooling of the spindle 102 by the liquid cooling component effectively intercepts and removes the heat conducted to the spindle 102 by the shafts at both ends, so that the overall temperature rise of the spindle 102 is controlled, avoiding thermal expansion and thermal deformation caused by heat accumulation, ensuring the accuracy and stability of the spindle 102 under high speed rotation, and providing a basic guarantee for the high-speed operation of the spindle 102. By using the multi-layered spiral design of the spiral flow channel 201, the contact path and heat exchange time between the coolant and the spindle 102 are significantly extended. At the same time, the coolant continuously washes the surface of the spindle 102 during the spiral flow process, so that the coolant can fully absorb the heat conducted by the spindle 102 and improve the heat exchange efficiency of a single cycle.

[0025] like Figure 4 and Figure 5 As shown, the air-cooled assembly includes a top seat 108 fixed to the top of the chassis 101. A sleeve frame 3 is fixedly installed at the bottom of the top seat 108. A centrifugal impeller 301 is rotatably installed inside the sleeve frame 3. A series of interconnected air outlet pipes 302 are evenly fixedly installed on the outside of the sleeve frame 3. The other end of each set of air outlet pipes 302 passes through the chassis 101 and extends into the chassis 101. A motor 109 is fixedly installed at the top of the top seat 108. The output shaft of the motor 109 passes through the centrifugal impeller 301 and is fixedly installed at the top of the connecting shaft 103. The connecting shaft 103 is located at the air inlet end of the centrifugal impeller 301. The bottom wall of the chassis 101 is thickened, and a cavity 310 is formed inside the bottom wall of the chassis 101. The inner cavity bottom wall of the chassis 101 is evenly provided with wall flow channels 312 that communicate with the cavity 310.

[0026] By adopting the above technical solution, when the motor 109 is turned on during operation, the output shaft of the motor 109 will drive the centrifugal impeller 301 to rotate. As the centrifugal impeller 301 rotates, it draws in air axially through its bottom opening. Under centrifugal force, the drawn-in gas is radially thrown out and pressurized. The gas is discharged into the sleeve 3 and then through each set of exhaust pipes 302 into the space between the casing 101 and the cooling sleeve 2. The gas flows between the casing 101 and the cooling sleeve 2 and finally exits through the internal flow channel 312, forming a cooling effect through the air-cooled assembly. Forced convection is achieved, and the heat on the outer wall of the cooling sleeve 2 is continuously carried away, so that a certain temperature difference is always maintained between the inner and outer walls of the cooling sleeve 2. This ensures that the heat exchange efficiency of the coolant in the spiral flow channel 201 remains stable at a high level, and avoids heat exchange failure due to the coolant's own temperature rise. This further cools the cooling sleeve 2 and the chassis 101, thereby improving the overall cooling effect on the spindle 102. At the same time, a continuous airflow is formed inside the chassis 101 to prevent heat accumulation inside the chassis 101, further limiting the overall temperature rise of the spindle 102. While the centrifugal impeller 301 is drawing in air, the flow path of these gases passes through the outside of the connecting shaft 103 and the output shaft of the motor 109, thereby pre-cooling the key parts on the two heat conduction paths of the motor 109 output shaft and the connecting shaft 103, reducing the conduction of heat along the connecting shaft 103 to the main shaft 102, and weakening the transfer of heat to the main shaft 102 from the source.

[0027] like Figure 3 and Figure 4 As shown, a circular frame 4 is rotatably installed inside the chassis 101. The circular frame 4 is located outside the cooling sleeve 2. A lever 401 is evenly fixedly installed on the top of the circular frame 4. The bottom end of each group of air outlet pipes 302 is directly facing the adjacent lever 401. A lever 402 is evenly fixedly installed on the inner wall of the circular frame 4.

[0028] By adopting the above technical solution, when the gas discharged from the centrifugal impeller 301 is discharged into the casing 101 through the exhaust pipe 302, the bottom end of each set of exhaust pipes 302 is directly facing an adjacent deflector plate 401. The gas discharged from the exhaust pipe 302 acts on the surface of the adjacent deflector plate 401, thus pushing the deflector plate 401 and causing it to rotate on the inner wall of the casing 101 via the circular frame 4. The rotation of the circular frame 4 will drive the deflector plates 401 at its top to rotate synchronously. At this time, the next deflector plate 401 just moves to the bottom output position of the exhaust pipe 302, thereby causing the circular frame 4 to rotate. As the circular frame 4 rotates continuously, it drives the levers 402 on its inner wall to rotate synchronously, thereby continuously agitating the gas between the chassis 101 and the cooling sleeve 2, dispersing the gas and improving its circumferential distribution uniformity. During this process, the agitation of the levers 402 effectively breaks the airflow dead zone and laminar boundary layer that may be formed between the chassis 101 and the cooling sleeve 2, significantly increasing the contact frequency and heat exchange area between the cooling gas and the outer wall of the cooling sleeve 2, thereby greatly enhancing the convective heat transfer effect of the air-cooled components and further improving the heat dissipation efficiency of the cooling sleeve 2.

[0029] like Figures 3 to 5 As shown, axial flow impellers 311 are evenly installed on the shaft wall of tool shaft 104. Each set of axial flow impellers 311 is located in cavity 310. Exhaust pipes 313 are evenly fixedly installed at the bottom of the casing 101. The top of each set of exhaust pipes 313 penetrates the bottom wall of casing 101 and is connected to cavity 310.

[0030] Each set of exhaust pipes 313 is fitted with a circular frame 410 on the outside. The top of the circular frame 410 is provided with a circular groove 415 that matches the exhaust pipe 313. The circular frame 410 is rotatably installed on the bottom of the housing 101. The inner cavity bottom wall of the circular frame 410 is uniformly fixed with a second baffle plate 411. The bottom end of each set of exhaust pipes 313 is directly facing the adjacent second baffle plate 411.

[0031] Ball head tubes 412 are evenly installed at the bottom of the circular frame 410. Each ball head tube 412 has a ball head seat 413 installed at its bottom end. Each ball head seat 413 has a bamboo joint tube 414 installed at its other end.

[0032] By adopting the above technical solution, the gas discharged between the cooling sleeve 2 and the chassis 101 through the exhaust pipe 302 will be discharged into the cavity 310 through the inner wall flow channel 312. When the tool shaft 104 rotates, it will drive the axial flow impeller 311 to rotate synchronously. When the axial flow impeller 311 rotates, it will realize axial air intake and exhaust. The inner wall flow channel 312 actively draws air between the chassis 101 and the cooling sleeve 2. Through the active suction of the axial flow impeller 311, a negative pressure is formed in the cavity 310 above it. This makes the entire air-cooling channel form a complete closed loop from the top centrifugal impeller 301 to the bottom axial flow impeller 311, ensuring that the airflow between the chassis 101 and the cooling sleeve 2 has sufficient velocity and flow rate, and avoiding slow airflow leading to heat dissipation failure. The extracted gas is then actively exhausted through each set of exhaust pipes 313. The gas will be discharged into the annular frame 410 and then discharged through the ball head tube 412, ball head seat 413 and bamboo joint tube 414. The gas is finally guided to the tool processing area to realize the recycling and reuse of gas, and the hot air flow generated by the spindle 102 is converted into auxiliary cooling and chip removal power for the tool and workpiece. With the bottom end of each exhaust pipe 313 facing the adjacent second dial plate 411, the gas discharged from the exhaust pipe 313 will directly act on its corresponding second dial plate 411, and then push the second dial plate 411 to drive the ring frame 410 to rotate on the bottom wall of the machine box 101. This can achieve uniform air blowing at the position of mirror processing of the workpiece surface. On the basis of the original method of spraying coolant to the tool and workpiece through the coolant pipe for cooling, lubrication and chip removal, the rotation of the ring frame 410 makes the exhaust direction of each set of bamboo joint pipes 414 constantly change, avoiding the uneven local cooling of the workpiece caused by long-term fixed-point air blowing, so that the tool and workpiece surface can obtain a circumferential uniform air cooling effect, ensuring the uniformity of the temperature field of the workpiece surface during mirror processing. The bottom end of the ball head tube 412 is provided with a ball head, and the ball head seat 413 is sleeved on the outside of the ball head and rotates with it in a universal manner. The angle of the bamboo joint tube 414 can be adjusted by the ball head seat 413, and the length of the bamboo joint tube 414 can be adjusted by the bamboo joint tube 414. Thus, the blowing angle and blowing distance can be flexibly adjusted according to different workpiece shapes and processing positions to adapt to the changing position requirements of the contact area between the tool and the workpiece during the partial mirror surface processing of heavy workpieces.

[0033] like Figure 4 As shown, fins 204 are evenly installed on the outer wall of the cooling sleeve 2, and each set of levers 402 extends to the space between two adjacent fins 204.

[0034] By adopting the above technical solution and through the arrangement of each fin 204, the equivalent heat dissipation area of ​​the cooling sleeve 2 is greatly increased, so that the heat on the outer wall of the cooling sleeve 2 can be exchanged with the flowing air with a larger surface area. The rotation of the lever 402 driven by the circular frame 4 disturbs the gas at each group of fins 204, so that the gas forms a local vortex between the fins 204, continuously destroying the thermal boundary layer on the surface of the fins 204, keeping the convective heat transfer coefficient on the surface of the fins 204 at a high level, ensuring that the heat absorbed by the main shaft 102 of the cooling sleeve 2 can be discharged in time, and further improving the heat dissipation efficiency.

[0035] like Figure 5 As shown, a stepped flange 105 is detachably installed at the bottom of the chassis 101, and the tool shaft 104 is rotatably installed with the stepped flange 105.

[0036] A fixed sleeve 106 is fixedly installed at the bottom of the stepped flange 105. A tool holder assembly 107 is rotatably installed inside the fixed sleeve 106. The tool holder assembly 107 is fixedly installed at the bottom of the tool shaft 104.

[0037] The bottom ends of the air outlet pipe 302 and the exhaust pipe 313 are located on the top upper side of the first dial plate 401 and the second dial plate 411, respectively.

[0038] By adopting the above technical solution, the output shaft of the motor 109 will drive the spindle 102, the connecting shaft 103 and the tool shaft 104 to rotate at high speed. The tool shaft 104 will drive the tool holder assembly 107 to rotate, thereby realizing the mirror surface processing of the workpiece.

[0039] Working principle: During operation, the motor 109 drives the spindle 102 and tool spindle 104 to rotate at high speed through the connecting shaft 103. The tool spindle 104 drives the tool holder assembly 107 to rotate to achieve mirror surface processing of the workpiece. The coolant enters the spiral flow channel 201 on the inner wall of the cooling sleeve 2 through the inlet pipe 202, flows spirally downward along the spiral flow channel 201 and fills the gap between the cooling sleeve 2 and the spindle 102, and performs enveloping cooling on the spindle 102 and the connecting shafts 103 and tool spindle 104 at both ends. Finally, it flows back to the coolant circulation treatment device through the outlet pipe 203 to form a liquid cooling circulation loop. The output shaft of motor 109 drives the centrifugal impeller 301 to rotate, axially drawing in air from its bottom opening. Under the action of centrifugal force, the gas is radially thrown out and pressurized, and discharged into the space between the casing 101 and the cooling sleeve 2 through the outlet pipe 302. This forces air cooling on the outer wall of the cooling sleeve 2 and simultaneously pre-cools the connecting shaft 103 and the output shaft of motor 109. During the flow of gas, the deflector plate 401 is pushed, which drives the circular frame 4 and the lever 402 to rotate continuously, stirring and dispersing the gas and improving its circumferential distribution uniformity. This increases the contact frequency and heat exchange area between the gas and the outer wall of the cooling sleeve 2 and the fins 204, thus enhancing the air cooling effect. The axial impeller 311 mounted on the tool shaft 104 rotates synchronously with the tool shaft 104. It actively draws in the gas between the housing 101 and the cooling sleeve 2 through the inner wall flow channel 312, so that the entire air-cooling channel forms a complete negative pressure closed loop from the top centrifugal impeller 301 to the bottom axial impeller 311, ensuring that the airflow has sufficient velocity and flow rate. The gas enters the cavity 310 through the inner wall flow channel 312, and then is discharged into the circular frame 410 through the exhaust pipe 313. At the same time, it pushes the second dial plate 411 to drive the circular frame 410 to rotate. The gas is blown out to the workpiece surface processing position through the ball head tube 412, ball head seat 413 and bamboo joint tube 414 in a circumferential rotation, further assisting in the cooling and chip removal of the tool on the tool holder assembly 107 and the workpiece surface.

[0040] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A heavy-duty high-speed machine tool, comprising a heavy-duty machine tool (1), wherein a housing (101) is mounted on a movable slide of the heavy-duty machine tool (1), and a spindle (102) is non-contactly disposed inside the housing (101), wherein the two ends of the spindle (102) are rotatably mounted to the housing (101) via a connecting shaft (103) and a tool shaft (104) respectively; Its features are: Also includes: The liquid cooling assembly includes a cooling sleeve (2) disposed on the outside of the spindle (102). The two ends of the cooling sleeve (2) are fixedly installed to the top and bottom walls of the inner cavity of the chassis (101), respectively. A spiral flow channel (201) is provided on the inner wall of the cooling sleeve (2). An inlet pipe (202) and an outlet pipe (203) are respectively provided at the top and bottom ends of the spiral flow channel (201). The other ends of the inlet pipe (202) and the outlet pipe (203) pass through the cooling sleeve (2) and the chassis (101) and extend to the outside of the chassis (101). The inner ends of the inlet pipe (202) and the outlet pipe (203) are directly facing the spiral path of the spiral flow channel (201). The upper side of the chassis (101) also includes an air-cooling assembly, which is used to force air cooling of the outer wall of the cooling sleeve (2).

2. The heavy-duty high-speed machine tool according to claim 1, characterized in that: The air-cooled assembly includes a top seat (108) fixed to the top of the chassis (101). A sleeve frame (3) is fixedly installed at the bottom of the top seat (108). A centrifugal impeller (301) is rotatably installed inside the sleeve frame (3). A connected air outlet pipe (302) is evenly fixedly installed on the outside of the sleeve frame (3). The other end of each set of air outlet pipes (302) passes through the chassis (101) and extends into the chassis (101). A motor (109) is fixedly installed on the top of the top seat (108). The output shaft of the motor (109) passes through the centrifugal impeller (301) and is fixedly installed at the top of the connecting shaft (103). The connecting shaft (103) is located at the air inlet end of the centrifugal impeller (301). The bottom wall of the chassis (101) is thickened, and a cavity (310) is opened in the bottom wall of the chassis (101). The inner wall of the chassis (101) is uniformly provided with an inner flow channel (312) that communicates with the cavity (310).

3. A heavy-duty high-speed machine tool according to claim 2, characterized in that: A circular frame (4) is rotatably installed inside the chassis (101). The circular frame (4) is located outside the cooling sleeve (2). A lever (401) is uniformly fixedly installed on the top of the circular frame (4). The bottom end of each group of air outlet pipes (302) is directly facing the adjacent lever (401). A lever (402) is uniformly fixedly installed on the inner wall of the circular frame (4).

4. A heavy-duty high-speed machine tool according to claim 3, characterized in that: Axial flow impellers (311) are uniformly installed on the shaft wall of the tool shaft (104). Each set of axial flow impellers (311) is located in the cavity (310). Exhaust pipes (313) are uniformly fixedly installed at the bottom of the housing (101). The top of each set of exhaust pipes (313) penetrates the bottom wall of the housing (101) and communicates with the cavity (310).

5. A heavy-duty high-speed machine tool according to claim 4, characterized in that: Each group of exhaust pipes (313) is fitted with a circular frame (410) on the outside. The top of the circular frame (410) is provided with a circular groove (415) that is adapted to the exhaust pipe (313). The circular frame (410) is rotatably installed on the bottom of the chassis (101). The inner cavity bottom wall of the circular frame (410) is uniformly fixed with a second dial plate (411). The bottom end of each group of exhaust pipes (313) is directly facing the adjacent second dial plate (411).

6. A heavy-duty high-speed machine tool according to claim 5, characterized in that: Ball head tubes (412) are evenly installed at the bottom of the circular frame (410). Each ball head tube (412) has a ball head seat (413) installed at the bottom end of each ball head seat (413). A bamboo joint tube (414) is installed at the other end of each ball head seat (413).

7. A heavy-duty high-speed machine tool according to claim 3, characterized in that: The outer wall of the cooling sleeve (2) is uniformly equipped with fins (204), and each set of levers (402) extends to the space between the two adjacent fins (204).

8. A heavy-duty high-speed machine tool according to claim 1, characterized in that: A stepped flange (105) is detachably installed at the bottom of the chassis (101), and the tool shaft (104) is rotatably installed with the stepped flange (105).

9. A heavy-duty high-speed machine tool according to claim 8, characterized in that: A fixing sleeve (106) is fixedly installed at the bottom end of the stepped flange (105), and a tool holder assembly (107) is rotatably installed inside the fixing sleeve (106). The tool holder assembly (107) is fixedly installed at the bottom end of the tool shaft (104).

10. A heavy-duty high-speed machine tool according to claim 5, characterized in that: The bottom ends of the air outlet pipe (302) and the exhaust pipe (313) are located on the top upper side of the first dial plate (401) and the second dial plate (411), respectively.

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