Cooling device for main shaft and machine tool

Abstract

The cooling device comprises a body and a heat conductor, a cooling liquid flowing channel is defined by the body and the heat conductor, a mounting hole is formed in the middle of the heat conductor, and the mounting hole is used for being matched with the outer wall of the main shaft in a mounting mode. The body comprises an upper cooling part and a lower cooling part, a plurality of flow dividing holes are formed in the lower surface of the lower cooling part, each flow dividing hole is connected with a nozzle, the nozzles are duckbilled nozzles, at least part of the nozzles are used for facing a main shaft, and at least part of the nozzles are used for facing a cutter; the heat conductor and the body are detachably connected or integrally formed, and the heat conductivity coefficient of the heat conductor is larger than that of the body. The heat conductor is made of metal, and the thickness of the heat conductor is less than 5mm; or the heat conductivity coefficient of the heat conductor is more than 16W / (m.K). Heat generated by high-speed rotation of a cutter during machining of the spindle is transmitted to cutting fluid continuously switched in the cooling device for the spindle through the heat conductor, so that the effect of cooling the spindle is achieved, and the service life of the spindle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a cooling device for a spindle and a machine tool. Background Art

[0002] The existing spindle ring spray cooling device for the spindle can play the role of shunting and flushing the workpiece during machine tool processing. In addition, it can also cool down the parts at the processing site and the spindle tool; however, during the processing, the parts that generate a large amount of heat also include the spindle. The existing spindle ring spray has little effect on cooling the spindle and cannot meet the need for cooling down the spindle. In addition, it cannot fully play the cooling role of the coolant in the spindle ring spray device, resulting in waste of the cooling energy of the coolant. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a cooling device for a spindle and a machine tool, which can not only play the role of shunting and flushing the workpiece during processing, but also cool the spindle, and realize the full utilization of the coolant.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] First aspect: A cooling device for a spindle, including a body and a heat conductor arranged in the middle of the body. The body and the heat conductor enclose a coolant flow channel. An installation hole is arranged in the middle of the heat conductor, and the installation hole is used for installation and cooperation with the outer wall of the spindle.

[0006] In an embodiment of the utility model, the body includes an upper cooling part and a lower cooling part, and the heat conductor includes an upper heat conductor and a lower heat conductor; the upper cooling part is connected to the upper heat conductor, and the upper heat conductor is provided with a first installation hole; the lower cooling part is connected to the lower heat conductor, and the lower heat conductor is provided with a second installation hole. The first installation hole and the second installation hole cooperate to form the installation hole.

[0007] In an embodiment of the utility model, a first water diversion groove is arranged on the lower surface of the upper cooling part, and the first water diversion groove surrounds the upper heat conductor; a second water diversion groove is arranged on the upper surface of the lower cooling part, and the second water diversion groove surrounds the lower heat conductor. The upper cooling part and the lower cooling part are in sealing cooperation, and the upper heat conductor and the lower heat conductor are in sealing cooperation to form a coolant flow channel.

[0008] In an embodiment of the utility model, a water inlet through hole is opened on the upper cooling part and / or the lower cooling part, and the water inlet through hole is communicated with the coolant flow channel.

[0009] In one embodiment of the present utility model, a plurality of shunt holes are provided on the lower surface of the lower cooling part, each of the shunt holes is respectively connected to a nozzle, at least part of the nozzles are used to face the main shaft, and at least part of the nozzles are used to face the cutting tool of the main shaft.

[0010] In one embodiment of the present utility model, the heat conductor is detachably connected to or integrally formed with the body, and the heat conduction coefficient of the heat conductor is greater than that of the body.

[0011] In one embodiment of the present utility model, the material of the heat conductor is metal, and the thickness of the heat conductor is less than 5 mm; or the heat conduction coefficient of the heat conductor is above 16 W / (m·K).

[0012] In a second aspect: a machine tool includes a main shaft, a coolant tank, and the cooling device as described above is installed. The installation hole of the cooling device is sleeved on the main shaft, and the coolant tank is communicated with the coolant flow channel through a coolant pipeline.

[0013] In one embodiment of the present utility model, a main shaft box and a mounting bracket are further included. One end of the mounting bracket is connected to the cooling device, and the other end is connected to the main shaft box.

[0014] In one embodiment of the present utility model, an electric valve is further included, and the electric valve is provided on the coolant pipeline.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] A cooling device for a main shaft according to the present utility model. An installation hole adapted to the outer wall of the main shaft is provided in the middle of the cooling device for the main shaft. The main shaft passes through the installation hole and is fixedly arranged with the cooling device for the main shaft. A coolant flow channel is arranged inside the cooling device for the main shaft. The coolant flow channel is arranged around the installation hole. In the cooling device for the main shaft, the cooling device for the main shaft further includes a heat conductor arranged between the flow channel and the hole wall of the installation hole. The heat generated by the high-speed rotation of the cutting tool during the processing of the main shaft is transferred to the continuously switched cutting fluid inside the cooling device for the main shaft through the hole wall of the installation hole and the heat conductor, thereby playing a role in cooling the main shaft and prolonging the service life of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall assembly structure of the present utility model;

[0018] Figure 2 It is an exploded view of the present utility model Figure 1 ;

[0019] Figure 3 It is an exploded view of the present utility model Figure 2 .

[0020] Description of the reference numerals of the drawings:

[0021] 100, upper cooling part; 101, first mounting hole; 102, first water distribution tank; 200, lower cooling part; 201, second mounting hole; 202, second water distribution tank; 203, shunt hole; 204, nozzle; 300, water inlet through hole; 400, main shaft; 500, mounting bracket; 600, coolant pipeline; 700, heat conductor; 701, upper heat conductor; 702, lower heat conductor. Detailed implementation manners

[0022] The following details the implementation manners of the present utility model. The examples of the implementation manners are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The implementation manners described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, it can also be a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, it can also be an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements, indirect communication or the interaction relationship between two elements.

[0027] As Figures 1 to 3 shown, the present utility model provides a cooling device for a main shaft;

[0028] First aspect: The cooling device includes a body and a heat conductor 700 disposed in the middle of the body. The body and the heat conductor 700 enclose a coolant flow channel. An installation hole is provided in the middle of the heat conductor 700, and the installation hole is used for mounting and cooperating with the outer wall of the main shaft.

[0029] Among them, the heat conductor 700 is installed at the axial center position of the cooling device for the main shaft. The installation hole of the heat conductor 700 penetrates through the entire cooling device for the main shaft. The installation hole is cylindrical. An annular coolant flow channel is provided inside the cooling device for the main shaft; the heat generated by the main shaft during the machining process is transmitted to the coolant through the heat conductor 700, and the continuously flowing coolant in the coolant flow channel continuously cools down the wall of the installation hole, thereby cooling down the main shaft sleeved and fitted in the installation hole.

[0030] In an embodiment of the present utility model, the body includes an upper cooling part 100 and a lower cooling part 200, and the heat conductor 700 includes an upper heat conductor 701 and a lower heat conductor 702; the upper cooling part 100 is connected to the upper heat conductor 701, and the upper heat conductor 701 is provided with a first installation hole 101; the lower cooling part 200 is connected to the lower heat conductor 702, and the lower heat conductor 702 is provided with a second installation hole 201, and the first installation hole 101 and the second installation hole 201 cooperate to form the installation hole.

[0031] Among them, the split structure facilitates the machining of parts of the cooling device for the main shaft. In addition, the inside of the cooling device for the main shaft can be cleaned regularly; the upper heat conductor 701 is provided with a first installation hole 101, the first installation hole 101 is located at the center position of the upper heat conductor 701, the second installation hole 201 is coaxially arranged with the first installation hole 101, and the first installation hole 101 and the second installation hole 201 have the same diameter, ensuring a tight fit with the main shaft 400 and achieving a better cooling effect.

[0032] In an embodiment of the present utility model, a first water distribution groove 102 is provided on the lower surface of the upper cooling part 100, and the first water distribution groove 102 is arranged around the upper heat conductor 701; a second water distribution groove 202 is provided on the upper surface of the lower cooling part 200, and the second water distribution groove 202 is arranged around the lower heat conductor 702. The upper cooling part 100 and the lower cooling part 200 are hermetically fitted, and the upper heat conductor 701 and the lower heat conductor 702 are hermetically fitted to form a coolant flow channel.

[0033] In an embodiment of the present utility model, a water inlet through hole 300 is provided on the upper cooling part 100 or the lower cooling part 200, and the water inlet through hole 300 is communicated with the coolant flow channel.

[0034] The water inlet through hole 300 is provided on both the upper cooling part 100 and the lower cooling part 200. The water inlet through hole 300 is divided into an upper half and a lower half. The upper half is located on the side wall of the upper cooling part 100, and the lower half is located on the side wall of the lower cooling part 200. The coolant pipeline 600 is fixedly assembled in the water inlet through hole 300 through the upper cooling part 100 and the lower cooling part 200 and is communicated with the coolant flow channel.

[0035] In an embodiment of the present utility model, a plurality of diversion holes 203 are provided on the lower surface of the lower cooling part 200. Each of the diversion holes 203 is respectively connected with a nozzle 204. At least part of the nozzles 204 are used to face the main shaft, and at least part of the nozzles 204 are used to face the tool on the main shaft.

[0036] Six diversion holes 203 are provided on the lower surface of the lower cooling part 200. The diversion holes 203 are communicated with the coolant flow channel. The coolant in the coolant flow channel can flow out through the diversion holes 203. Three of the nozzles face the main shaft, and the other three nozzles face the tool on the main shaft.

[0037] The nozzle 204 is a duckbill nozzle 204, which pressurizes the coolant flowing out of the nozzle 204, so that the coolant can be ejected quickly and in a large area to achieve the effect of accelerating the cooling of the workpiece.

[0038] In an embodiment of the present utility model, the heat conductor 700 is detachably connected to the main body, which is convenient for the disassembly and replacement of the two, or the heat conductor 700 and the main body are integrally formed, so that the heat conduction effect of the heat conductor 700 is better; the heat conduction coefficient of the heat conductor 700 is greater than that of the main body, which is convenient for the heat of the main shaft to be transmitted to the coolant in the main body through the heat conductor 700; the integral structure is made of a metal material member with a thickness less than 5 mm, or the heat conduction coefficient of the heat conductor 700 is above 16 W / (m·K).

[0039] The metal material is, for example, an aluminum alloy material. The integral structure formed by it can, while ensuring the rigidity requirements of the coolant flow channel, better transfer the heat generated during the machining of the main shaft to the coolant. At the same time, the wall thickness of the mounting hole of the integral structure is less than 5 mm, or the heat conduction coefficient of the heat conductor 700 is above 16 W / (m·K), further accelerating the heat and cold exchange.

[0040] Second aspect: A machine tool includes a spindle 400 and a coolant tank. A cooling device for the spindle is installed, and the cooling device is sleeved on the spindle 400. The coolant tank is communicated with a coolant flow channel through a coolant pipeline 600.

[0041] The coolant is introduced into the coolant flow channel through the coolant pipeline 600. While cooling the spindle 400, the coolant can be ejected from a nozzle 204 to cool a workpiece being machined. In addition, the exchange of the coolant is accelerated.

[0042] In an embodiment of the present invention, a spindle box and a mounting bracket 500 are further included. One end of the mounting bracket 500 is connected to the cooling device, and the other end is connected to the spindle box. The cooling device is fixed by the mounting bracket 500.

[0043] In an embodiment of the present invention, an electric valve is further included, and the electric valve is arranged on the coolant pipeline 600.

[0044] The electric valve controls the flow rate and the on / off of the coolant flowing into the coolant flow channel. When the workpiece is being machined rapidly and generates a relatively high amount of heat, the flow rate of the coolant is increased to increase the exchange of the coolant, so as to cool down the spindle 400 and the workpiece being machined. When the workpiece being machined is relatively small or the heat generated during machining is relatively small, the flow rate of the coolant can be decreased.

[0045] Content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacement on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cooling device for a spindle, characterized in that, It includes a body and a heat conductor (700) disposed in the middle of the body. A coolant flow channel is enclosed by the body and the heat conductor (700). An installation hole is provided in the middle of the heat conductor (700) for mounting and cooperating with the outer wall of the main shaft. The body includes an upper cooling part (100) and a lower cooling part (200). A plurality of diversion holes (203) are provided on the lower surface of the lower cooling part (200). Each of the diversion holes (203) is connected to a nozzle (204). The nozzle (204) is a duckbill nozzle. At least part of the nozzles (204) are used to face the main shaft, and at least part of the nozzles (204) are used to face the tool of the main shaft. The heat conductor is detachably connected to or integrally formed with the body. The thermal conductivity of the heat conductor is greater than that of the body. The material of the heat conductor (700) is metal, and the thickness of the heat conductor (700) is less than 5 mm; or the thermal conductivity of the heat conductor (700) is above 16 W / (m·K).

2. The cooling device for a spindle according to claim 1, characterized in that, The heat conductor (700) includes an upper heat conductor (701) and a lower heat conductor (702); the upper cooling part (100) is connected to the upper heat conductor (701), and the upper heat conductor (701) is provided with a first installation hole (101); the lower cooling part (200) is connected to the lower heat conductor (702), and the lower heat conductor (702) is provided with a second installation hole (201). The first installation hole (101) and the second installation hole (201) cooperate to form the installation hole.

3. The cooling device for a spindle according to claim 2, characterized in that, A first water diversion tank (102) is provided on the lower surface of the upper cooling part (100). The first water diversion tank (102) is arranged around the upper heat conductor (701); a second water diversion tank (202) is provided on the upper surface of the lower cooling part (200). The second water diversion tank (202) is arranged around the lower heat conductor (702). The upper cooling part (100) and the lower cooling part (200) are hermetically fitted, and the upper heat conductor (701) and the lower heat conductor (702) are hermetically fitted to form a coolant flow channel.

4. The cooling device for a spindle according to claim 3, characterized in that, An inlet through hole (300) is provided on the upper cooling part (100) and / or the lower cooling part (200). The inlet through hole (300) is communicated with the coolant flow channel.

5. A machine tool, comprising a spindle (400) and a coolant tank, characterized in that, Install a cooling device for the main shaft according to any one of claims 1 to 4. The installation hole of the cooling device is sleeved on the main shaft (400). The coolant tank is communicated with the coolant flow channel through a coolant pipeline (600).

6. The machine tool according to claim 5, wherein, It further includes a main shaft box and a mounting bracket (500). One end of the mounting bracket (500) is connected to the cooling device, and the other end is connected to the main shaft box.

7. The machine tool according to claim 5, characterized in that, It further includes an electric valve. The electric valve is provided on the coolant pipeline (600).

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