High-speed main shaft cooling device of vertical machining center

Abstract

The utility model relates to the technical field of vertical machining center equipment, in particular to a high-speed main shaft cooling device of a vertical machining center, which comprises a main shaft body, the main shaft body is a high-speed main shaft of the vertical machining center, a first shaft rod outer sleeve and a second shaft rod outer sleeve are sleeved outside the main shaft body, and the first shaft rod outer sleeve and the second shaft rod outer sleeve are arranged in a butt joint mode. According to the high-speed main shaft cooling device of the vertical machining center, the heat exchange spiral pipe surrounds the outer layer of the protective inner pipe arranged in the first shaft rod outer sleeve and the second shaft rod outer sleeve, the butt joint pipe and the U-shaped pipeline are connected to form a circulation channel, a cooling medium circularly flows in the circulation channel, and heat generated by operation of the main shaft body can be efficiently taken away; the heat exchange spiral pipe made of metal materials is adopted, heat can be rapidly transferred to a cooling medium from the main shaft through the good heat conduction performance of the heat exchange spiral pipe, efficient cooling of the main shaft is achieved, it is guaranteed that the main shaft is at the proper working temperature all the time, and thermal deformation caused by temperature fluctuation is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vertical machining center equipment technical field, concretely is a kind of vertical machining center's high-speed spindle cooling device. BACKGROUND

[0002] Vertical machining center is a kind of advanced equipment for machining, and is widely used in modern manufacturing. Its high-speed spindle is a core component, and undertakes the important task of driving the cutter to rotate to cut the workpiece. The high-speed spindle usually has very high speed, which can reach thousands of revolutions per minute or even tens of thousands of revolutions per minute. At high speed, the spindle and its related components will generate a lot of heat.

[0003] The high temperature of the spindle not only affects the machining accuracy, but also causes the spindle to deform, resulting in part size deviation and surface roughness increase. The retention of heat also reduces the service life of the spindle. The high temperature causes the lubrication performance of the bearing to decrease and accelerate wear. Moreover, the traditional air cooling has limited cooling effect, resulting in a lack of cooling area for the spindle, which makes it difficult to cooperate with the high-speed work of the spindle. SUMMARY

[0004] The utility model aims at providing a kind of vertical machining center's high-speed spindle cooling device, to solve the problem that the high temperature of the spindle not only affects the machining accuracy, but also causes the spindle to deform, resulting in part size deviation and surface roughness increase. The retention of heat also reduces the service life of the spindle. The high temperature causes the lubrication performance of the bearing to decrease and accelerate wear. Moreover, the traditional air cooling has limited cooling effect, resulting in a lack of cooling area for the spindle, which makes it difficult to cooperate with the high-speed work of the spindle.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of vertical machining center's high-speed spindle cooling device, including spindle body, which is the high-speed spindle of vertical machining center. The spindle body is provided with shaft sleeve one and shaft sleeve two, and the shaft sleeve one and the shaft sleeve two are connected. The spindle body, the shaft sleeve one and the shaft sleeve two form the main structure of the high-speed spindle of vertical machining center.

[0006] One end of the shaft sleeve one is provided with a buffer frame, and the buffer frame is close to the spindle body. An insulating ring is connected to the outer wall of the shaft sleeve one, and the insulating ring is sleeved with the outer wall of the buffer frame. Two heat insulation plates are installed on the inner wall of the shaft sleeve one, and the heat insulation plates are penetrated by the spindle body.

[0007] The protective outer tube and the protective inner tube are sleeved and installed, the two ends of the protective inner tube are respectively installed with a metal bearing, the inner ring of the metal bearing is penetrated by the main shaft body, and the outer ring of the metal bearing is butted with the protective inner tube, the outer layer of the protective inner tube is surrounded by heat exchange spiral pipes, the heat exchange spiral pipes are provided with two butt pipes, a butt pipe is installed between the two heat exchange spiral pipes, one end of one heat exchange spiral pipe is connected with the heat exchange spiral pipe through a U-shaped pipe, and the heat exchange spiral pipe penetrates the buffer frame.

[0008] By adopting the above technical scheme, the multi-layer environment in the device is separated in a sleeved manner, and the cooling and heat recovery of the high-speed main shaft are effectively realized.

[0009] Preferably, the two heat insulation plates are symmetrically distributed on the two sides of the auxiliary frame, balance the heat blocking, reduce the heat diffusion in the shaft sleeve, and maintain the stable operation of the cooling system

[0010] By adopting the above technical scheme, the main shaft body is precisely centered with the shaft sleeve one and the shaft sleeve two, the rotation of the main shaft is stable, the vibration and eccentric wear are reduced, and the machining precision is improved.

[0011] Preferably, the heat insulation plate is provided with two, and the two heat insulation plates are respectively arranged on the two sides of the auxiliary frame, and the auxiliary frame is penetrated by the heat exchange spiral pipe, the butt pipe and the return pipe.

[0012] By adopting the above technical scheme, the two heat insulation plates are symmetrically distributed on the two sides of the auxiliary frame, balance the heat blocking, reduce the heat diffusion in the shaft sleeve, and maintain the stable operation of the cooling system.

[0013] Preferably, the auxiliary frame is penetrated by the main shaft body, and the two sides of the auxiliary frame are respectively installed with a metal bearing, and the metal bearing is provided with four.

[0014] By adopting the above technical scheme, the four metal bearings effectively disperse the supporting force, effectively reduce the shaking of the main shaft during operation, and ensure the stability of high-speed rotation.

[0015] Preferably, the shaft sleeve two is provided with a heat insulation plate inside, and the shaft sleeve two is provided with two metal bearings.

[0016] By adopting the above technical scheme, the same structure on both sides ensures that the overall cooling effect of the main shaft is balanced, avoids local overheating, and further improves the cooling efficiency and machining precision.

[0017] Preferably, the structure of the protective outer tube, the heat exchange spiral pipe and the protective inner tube inside the shaft sleeve two is consistent with the installation structure inside the shaft sleeve one.

[0018] Adopting the technical scheme, the shaft sleeve two is consistent with the shaft sleeve one in internal structure, facilitating production and manufacturing, reducing cost, and facilitating later maintenance and component replacement.

[0019] Preferably, the shaft sleeve two and the shaft sleeve one are respectively provided with a strip-shaped opening on the side wall surface, and the strip-shaped openings of the shaft sleeve one and the shaft sleeve two are provided with metal sheets.

[0020] Adopting the technical scheme, the strip-shaped openings of the shaft sleeve one and the shaft sleeve two and the metal sheets facilitate opening, checking and repairing the internal components, shorten the maintenance time, and improve the equipment operation efficiency.

[0021] Compared with the prior art, the vertical machining center high-speed spindle cooling device has the advantages that:

[0022] 1. In the device, the protective inner tube is arranged in the shaft sleeve one and the shaft sleeve two, and the outer layer of the protective inner tube is surrounded by the heat exchange spiral pipe, and the circulating passage is formed by connecting the butt joint pipe and the U-shaped pipe, and the cooling medium circulates in the circulating passage, so that the heat generated by the main shaft body during operation can be efficiently taken away, the heat exchange spiral pipe made of metal material has good heat conduction performance, so that the heat is quickly transferred from the main shaft to the cooling medium, the efficient cooling of the main shaft is realized, the main shaft is always kept at the appropriate working temperature, the thermal deformation caused by temperature fluctuation is effectively reduced, and the machining precision is improved.

[0023] 2. The insulating ring connected to the outer wall surface of the shaft sleeve one and the outer wall surface of the buffer frame are sleeved, which can effectively prevent electrical leakage, protect the safety of the operator and the normal operation of the electrical system of the equipment, the strip-shaped openings provided on the side wall surfaces of the shaft sleeve two and the shaft sleeve one are provided with metal sheets, and when the equipment is maintained, the metal sheets can be easily opened to check and replace the internal components, such as cleaning the heat exchange spiral pipe and checking the wear condition of the metal bearing, thereby improving the convenience of equipment maintenance, reducing downtime, and improving production efficiency.

[0024] 3. When the device is used, the axis of the main shaft body is aligned with the center line of the shaft sleeve one and the shaft sleeve two, and an auxiliary frame is arranged at the connection, the auxiliary frame is penetrated by the main shaft body and the metal bearings are installed on both sides, and the stability of the main shaft system is greatly enhanced, in the high-speed running process, the auxiliary frame and the metal bearings cooperate to reduce the vibration and deviation of the main shaft, ensure the stability of the machining, the heat insulation plate installed on the inner wall of the shaft sleeve one and the shaft sleeve two, and the protective outer tube and the protective inner tube sleeved outside can effectively prevent the heat of the main shaft from being transferred to the outside, reduce the influence of the external environment on the main shaft, play a good protection role, and prolong the service life of the main shaft and related components. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1It is the whole external three-dimensional structure schematic view of the utility model;

[0026] Figure 2 It is the whole internal side section structure schematic view of the utility model;

[0027] Figure 3 It is the split three-dimensional structure schematic view of the protective outer tube and the protective inner tube of the utility model;

[0028] Figure 4 It is the whole internal structure horizontal section schematic view of the utility model;

[0029] Figure 5 It is the installation three-dimensional structure schematic view of the auxiliary frame and the butt joint pipe of the utility model;

[0030] Figure 6 It is the installation position structure schematic view of the butt joint pipe and the return pipe of the utility model.

[0031] In the drawing: 1, main shaft body; 2, buffer frame; 3, insulating ring; 4, shaft sleeve one; 5, heat insulation plate; 6, metal bearing; 7, protective outer tube; 8, auxiliary frame; 9, heat exchange spiral pipe; 10, butt joint pipe; 11, return pipe; 12, protective inner tube; 13, shaft sleeve two; 14, metal sheet. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0033] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: the cooling device of high-speed spindle of vertical machining center, including main shaft body 1, buffer frame 2, insulating ring 3, shaft sleeve one 4, heat insulation plate 5, metal bearing 6, protective outer tube 7, auxiliary frame 8, heat exchange spiral pipe 9, butt joint pipe 10, return pipe 11, protective inner tube 12, shaft sleeve two 13 and metal sheet 14;

[0034] Wherein, main shaft body 1, it is the high-speed spindle of vertical machining center, main shaft body 1 is equipped with shaft sleeve one 4 and shaft sleeve two 13, and shaft sleeve one 4 and shaft sleeve two 13 are butt joint and are arranged, and main shaft body 1, shaft sleeve one 4 and shaft sleeve two 13 form the main structure of high-speed spindle of vertical machining center;

[0035] One end of the shaft sleeve one 4 is provided with a buffer bracket 2, and the buffer bracket 2 is close to one side of the main shaft body 1, the outer wall surface of the shaft sleeve one 4 is connected with an insulating ring 3, and the insulating ring 3 is sleeved with the outer wall surface of the buffer bracket 2, two heat insulation plates 5 are installed on the inner wall surface of the shaft sleeve one 4, and the heat insulation plates 5 are penetrated by the main shaft body 1, the axis of the main shaft body 1 is aligned with the center line of the shaft sleeve one 4 and the shaft sleeve two 13, and an auxiliary bracket 8 is arranged inside the connection part of the shaft sleeve one 4 and the shaft sleeve two 13, the auxiliary bracket 8 is penetrated by the main shaft body 1, and the auxiliary bracket 8 is respectively connected with one metal bearing 6 on both sides, and four metal bearings 6 are arranged, two heat insulation plates 5 are arranged, and the two heat insulation plates 5 are respectively arranged on both sides of the auxiliary bracket 8, and the auxiliary bracket 8 is penetrated by the heat exchange spiral pipe 9, the butt joint pipe 10 and the return pipe 11;

[0036] The drawings of the specification are combined Figures 1-6 The shaft sleeve one 4 and the shaft sleeve two 13 are butt jointed according to requirements, the center lines of the two are accurately aligned with the axis of the main shaft body 1, high-precision measuring instruments can be used for measurement and calibration, at the same time, the auxiliary bracket 8 is installed inside the butt joint part, the auxiliary bracket 8 is firmly connected with the shaft sleeve one 4 and the shaft sleeve two 13 by bolts, the auxiliary bracket 8 should be closely attached to the inner wall of the shaft sleeve, and the main shaft body 1 of the vertical machining center is penetrated through the auxiliary bracket 8 and the shaft sleeve one 4 and the shaft sleeve two 13, the preliminary assembly of the main shaft and the shaft sleeve is completed, the buffer bracket 2 is installed at one end of the shaft sleeve one 4, the buffer bracket 2 is close to one side of the main shaft body 1, the buffer bracket 2 is firmly connected with the shaft sleeve one 4 by bolts, the insulating ring 3 is sleeved on the outer wall surface of the shaft sleeve one 4, and the outer wall surface of the buffer bracket 2 is connected, so as to ensure that the insulating ring 3 is installed tightly and plays a good insulation role;

[0037] Two heat insulation plates 5 are installed on the inner wall of the shaft sleeve one 4 according to the designed position, so that the heat insulation plates 5 are accurately penetrated by the main shaft body 1, and one heat insulation plate 5 is installed inside the shaft sleeve two 13, the protective outer pipe 7 and the protective inner pipe 12 are sleeved and installed between the heat insulation plates 5 inside the shaft sleeve one 4, so as to ensure that the two ends of the protective inner pipe 12 are accurately butt jointed with the metal bearing 6, the inner ring of the metal bearing 6 is penetrated by the main shaft body 1, the protective outer pipe 7, the protective inner pipe 12 and the metal bearing 6 in the shaft sleeve two 13 are installed in the same way, so as to ensure that the structures on both sides are consistent;

[0038] A protective outer tube 7 and a protective inner tube 12 are fitted between the heat insulation plates 5 inside the outer sleeve 4 of the shaft. The protective outer tube 7 and the protective inner tube 12 are fitted together. Each end of the protective inner tube 12 is installed with a metal bearing 6. The inner ring of the metal bearing 6 is penetrated by the main shaft body 1, and the outer ring of the metal bearing 6 is connected to the protective inner tube 12. A heat exchange spiral tube 9 is surrounded by the outer layer of the protective inner tube 12. The heat exchange spiral tube 9 is provided with two connecting pipes 10. The connecting pipes 10 are installed between the two heat exchange spiral tubes 9, and one end of the heat exchange spiral tube 9 is connected by a U-shaped tube. The channel is connected to the heat exchange spiral tube 9, and the heat exchange spiral tube 9 and one heat exchange spiral tube 9 pass through the buffer frame 2. A heat insulation plate 5 is provided inside the shaft sleeve 2 13, and two metal bearings 6 are provided inside the shaft sleeve 2 13. The structure of the protective outer tube 7, heat exchange spiral tube 9 and protective inner tube 12 inside the shaft sleeve 2 13 is consistent with the internal installation structure of the shaft sleeve 1 4. The side walls of the shaft sleeve 2 13 and the shaft sleeve 1 4 are respectively provided with strip openings, and metal plates 14 are installed in the strip openings of the shaft sleeve 1 4 and the shaft sleeve 2 13.

[0039] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, the heat exchange spiral tube 9 is wrapped around the outer layer of the protective inner tube 12. According to the designed circulation path, the two heat exchange spiral tubes 9 are connected together using the connecting pipe 10 to ensure a tight connection and good sealing. One end of one heat exchange spiral tube 9 is connected to the other heat exchange spiral tube 9 through a U-shaped pipe to form a complete cooling medium circulation path. The heat exchange spiral tube 9 in the circulation path passes through the buffer frame 2, and metal plates 14 are installed at the strip openings on the side walls of the shaft sleeve 13 and the shaft sleeve 4. They are fixed by bolts or welding to ensure the sealing and integrity of the cooling system.

[0040] In use, the cooling medium flows in from one end of a heat exchange spiral tube 9 and flows into another heat exchange spiral tube 9 through a U-shaped pipe. During the flow in the heat exchange spiral tube 9, it absorbs the heat generated by the operation of the main shaft. The connecting pipe 10 is used to connect the two heat exchange spiral tubes 9 to ensure the circulation of the cooling medium. After absorbing heat, the cooling medium flows out through the pipe that passes through the buffer frame 2 for heat dissipation and cooling treatment, and then flows back into the heat exchange spiral tube 9 for reuse.

[0041] Working principle: when using the high-speed spindle cooling device of the vertical machining center, the spindle body 1 is used as a high-speed rotating part, the shaft sleeve one 4 and the shaft sleeve two 13 are butted and sleeved outside it, and the main structural frame is formed, the spindle body 1 is used as a high-speed rotating part, the shaft sleeve one 4 and the shaft sleeve two 13 are butted and sleeved outside it, and the main structural frame is formed, the heat insulation plate 5 is arranged in the inner wall of the shaft sleeve one 4 and the inside of the shaft sleeve two 13 respectively, the heat generated by the spindle is prevented from being excessively transmitted to the shaft sleeve, the heat diffusion is reduced, the protective outer pipe 7 and the protective inner pipe 12 are sleeved and installed between the heat insulation plate 5 inside the shaft sleeve one 4, the two ends of the protective inner pipe 12 are matched with the spindle body 1 through the metal bearing 6, the protective inner pipe 12 plays a protective role on the spindle, and the influence of external factors on the spindle is reduced;

[0042] The heat exchange spiral pipe 9 is wrapped around the outer layer of the protective inner pipe 12, the cooling medium flows into one end of the heat exchange spiral pipe 9 during use, flows into another heat exchange spiral pipe 9 through the U-shaped pipe, absorbs the heat generated by the rotation of the spindle in the heat exchange spiral pipe 9, and then is connected through the butt joint pipe 10 for connecting the two heat exchange spiral pipes 9, so that the circulation flow of the cooling medium is ensured, after the cooling medium absorbs heat, the cooling medium flows out through the pipeline penetrating the buffer frame 2, is subjected to heat dissipation and cooling treatment, and then flows into the heat exchange spiral pipe 9 again for recycling, so that the recycling and uniform maintenance of heat are realized, and the practicability of the whole is increased.

[0043] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A high-speed spindle cooling device of a vertical machining center, comprising: a spindle body (1) which is a high-speed spindle of a vertical machining center, the spindle body (1) is sleeved with a shaft sleeve one (4) and a shaft sleeve two (13), the shaft sleeve one (4) and the shaft sleeve two (13) are arranged in abutment, and the spindle body (1), the shaft sleeve one (4) and the shaft sleeve two (13) constitute the main structure of the high-speed spindle of the vertical machining center; characterized in that: one end and the other end of the shaft sleeve one (4) are provided with a buffer bracket (2), and the buffer bracket (2) is close to one side of the spindle body (1), the outer wall surface of the shaft sleeve one (4) is connected with an insulating ring (3), and the insulating ring (3) is sleeved with the outer wall surface of the buffer bracket (2), and the inner wall surface of the shaft sleeve one (4) is provided with two heat insulation plates (5), and the heat insulation plates (5) are penetrated by the spindle body (1); the heat insulation plates (5) inside the shaft sleeve one (4) are sleeved with a protective outer tube (7) and a protective inner tube (12), and the protective outer tube (7) and the protective inner tube (12) are sleeved and installed, two ends of the protective inner tube (12) are respectively provided with one metal bearing (6), the inner ring of the metal bearing (6) is penetrated by the spindle body (1), the outer ring of the metal bearing (6) is in abutment with the protective inner tube (12), the outer layer of the protective inner tube (12) is surrounded by a heat exchange spiral pipe (9), the heat exchange spiral pipe (9) is provided with two abutment pipes (10), the abutment pipe (10) is installed between the two heat exchange spiral pipes (9), one end of the heat exchange spiral pipe (9) is connected with the heat exchange spiral pipe (9) through a U-shaped pipe, and the heat exchange spiral pipe (9) penetrates the buffer bracket (2) with one heat exchange spiral pipe (9).

2. A high speed spindle cooling device for a vertical machining center according to claim 1, characterized in that: The axis of the spindle body (1) is aligned with the center line of the shaft sleeve one (4) and the shaft sleeve two (13), and an auxiliary bracket (8) is arranged inside the connection part of the shaft sleeve one (4) and the shaft sleeve two (13).

3. A high speed spindle cooling device for a vertical machining center according to claim 1, characterized in that: The heat insulation plates (5) are provided with two, and the two heat insulation plates (5) are respectively arranged on both sides of the auxiliary bracket (8), and the auxiliary bracket (8) is penetrated by the heat exchange spiral pipe (9), the abutment pipe (10) and the return pipe (11).

4. A high speed spindle cooling device for a vertical machining center according to claim 2, characterized in that: The auxiliary bracket (8) is penetrated by the spindle body (1), and the auxiliary bracket (8) is respectively provided with one metal bearing (6) on both sides, and the metal bearing (6) is provided with four.

5. A high speed spindle cooling device for a vertical machining center according to claim 1, characterized in that: The shaft sleeve two (13) is provided with one heat insulation plate (5) inside, and the shaft sleeve two (13) is provided with two metal bearings (6) inside.

6. A high speed spindle cooling device for a vertical machining center according to claim 1, characterized in that: The protective outer tube (7), the heat exchange spiral pipe (9) and the protective inner tube (12) inside the shaft sleeve two (13) have the same structure as the installation structure inside the shaft sleeve one (4).

7. A high speed spindle cooling device for a vertical machining center according to claim 1, characterized in that: The shaft sleeve two (13) and the shaft sleeve one (4) are respectively provided with a strip-shaped opening on the side wall surface, and the strip-shaped openings of the shaft sleeve one (4) and the shaft sleeve two (13) are provided with metal sheets (14).

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