Cutter cooling device for numerical control machine tool

Abstract

A cutter cooling device for a numerical control machine tool is installed on a machine tool table top and a machine tool cutter and comprises a negative pressure cooling assembly, a cooling liquid spraying assembly and a high-pressure vacuum pump, the negative pressure cooling assembly is arranged on the machine tool cutter, and the cooling liquid spraying assembly is configured to spray cooling liquid towards the machine tool cutter; by arranging the high-pressure vacuum pump, the inner cavity and the bottom air inlet, a negative pressure environment is generated around the machine tool cutter, the gravity of a part of cooling liquid is counteracted through attraction force generated by negative pressure, the resultant force borne by the cooling liquid is reduced, the flowing speed of the cooling liquid is slowed down, and therefore the contact time between the cooling liquid and the machine tool cutter is prolonged; and the consumption and loss of the cooling liquid are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool tool cooling, and in particular relates to a tool cooling device for a numerically controlled machine tool. Background Art

[0002] A CNC machine tool is a device that machines workpieces through a tool. During the machining process, the friction between the tool and the workpiece generates a large amount of heat, which causes the tool temperature to rise and the structural strength to decrease. If the tool is not cooled, the tool wear will increase, seriously reducing the tool's service life, and will also affect the workpiece's machining accuracy.

[0003] The existing cooling method is mainly liquid cooling, that is, spraying coolant on the tool. By continuously spraying coolant, the heat accumulated on the tool is taken away to achieve the purpose of cooling the tool. However, the existing liquid cooling has the following problems: after the coolant is sprayed on the tool, it will flow down quickly, making the contact time between the coolant and the tool too short. Therefore, a large continuous spraying amount is required, resulting in high coolant consumption and loss. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a tool cooling device for a CNC machine tool to at least partially solve the above technical problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a tool cooling device for a CNC machine tool, which is installed on a machine tool table and a machine tool tool, and comprises a negative pressure cooling component, a coolant spraying component and a high-pressure vacuum pump, wherein the negative pressure cooling component is arranged on the machine tool tool, and the coolant spraying component is configured to spray coolant toward the machine tool tool; The negative pressure cooling component includes a tool sleeve, which is arranged on a machine tool tool. The tool sleeve is provided with a tool through hole, and the machine tool tool passes through the tool through hole. An internal cavity is provided inside the tool sleeve, and a plurality of bottom air inlets are provided at the bottom of the tool sleeve. The plurality of bottom air inlets are arranged on the tool sleeve in a circular array with the tool through hole as the center. The bottom air inlet is connected to the internal cavity, and the internal cavity is connected to a high-pressure vacuum pump. The high-pressure vacuum pump is configured to create a negative pressure environment in the internal cavity.

[0006] Furthermore, the negative pressure cooling assembly also includes a fixed connecting frame, the tool sleeve is connected to the fixed connecting frame, and the fixed connecting frame is detachably connected to the machine tool table; the side of the tool sleeve is provided with a side air outlet, and the side air outlet is connected to the internal cavity; the high-pressure vacuum pump is provided with a vacuum pump hose, and both ends of the vacuum pump hose are respectively connected to the high-pressure vacuum pump and the side air outlet, and the high-pressure vacuum pump is connected to the internal cavity through the vacuum pump hose and the side air outlet.

[0007] Furthermore, the fixed connecting frame includes a hoop and a telescopic rod, two ends of the telescopic rod are respectively connected to the hoop and the telescopic rod, the hoop is provided with a fastening screw, and the hoop is bolted to the machine tool table through the fastening screw.

[0008] Furthermore, a filter is provided inside the internal cavity, and the filter divides the internal cavity into two parts, an upper part and an lower part. The bottom air inlet is located below the filter, and the side air outlet is located above the filter.

[0009] Furthermore, a tool head is connected to the end of the machine tool tool, and the coolant spray assembly includes an annular coolant container and a coolant nozzle. A plurality of coolant nozzles are arranged in a circular array at the bottom of the annular coolant container. The coolant nozzle is connected to the interior of the annular coolant container, and the nozzle direction of the coolant nozzle points to the position of the tool head.

[0010] Furthermore, it also includes a coolant pump, which is provided with a cooling pump hose, and a liquid inlet is provided on the side of the annular coolant container, the liquid inlet is connected to the interior of the annular coolant container, and both ends of the cooling pump hose are respectively connected to the coolant pump and the liquid inlet, and the interior of the annular coolant container is connected to the coolant pump through the liquid inlet and the cooling pump hose.

[0011] Furthermore, a slot is provided on the outer surface of the tool sleeve, the slot is located near the bottom of the tool sleeve, and the annular coolant container is engaged in the slot.

[0012] Furthermore, the bottom of the tool sleeve is an inwardly concave curved surface, and the bottom air inlet is arranged on the curved surface.

[0013] Compared with the prior art, the present invention has the following advantages: The present invention generates a negative pressure environment around the machine tool by arranging a high-pressure vacuum pump, an internal cavity and a bottom air inlet, and uses the attraction generated by the negative pressure to offset a part of the coolant's own gravity, reduce the combined force on the coolant, and slow down the flow rate of the coolant, thereby increasing the contact time between the coolant and the machine tool, and reducing the amount and loss of the coolant. The present invention installs the tool sleeve on the machine tool, which is suitable for machine tool tables for various machining purposes. When in use, the tool sleeve will move synchronously with the machine tool to achieve automatic following of the tool sleeve, and there is no need to set up an additional mechanism to control the position of the tool sleeve, and the structure is simpler. In the present invention, the bottom of the tool sleeve is set as an inwardly concave curved surface, so that the bottom edge of the tool sleeve is higher than the center, and the bottom air inlet is set on the curved surface between the bottom edge and the center of the tool sleeve. When the high-pressure vacuum pump draws air through the bottom air inlet, a negative pressure environment of the region can be formed in the above-mentioned concave space, thereby increasing the attraction to the coolant, improving the delay effect of the coolant falling speed, and then reducing the amount and loss of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 A three-dimensional diagram of a tool cooling device for a CNC machine tool according to an embodiment of the present invention Figure 1 ; Figure 2 A front view of a tool cooling device for a CNC machine tool provided in an embodiment of the present invention; Figure 3 A right side view of a tool cooling device for a CNC machine tool according to an embodiment of the present invention; Figure 4 for Figure 3 The cross-sectional view along the AA direction; Figure 5 for Figure 4 The enlarged view at center Ⅰ; Figure 6 A three-dimensional diagram of a tool cooling device for a CNC machine tool according to an embodiment of the present invention Figure 2 ; Figure 7 for Figure 6 Magnified view at center II; Figure 8 A three-dimensional diagram of a negative pressure cooling assembly of a tool cooling device for a CNC machine tool provided in an embodiment of the present invention.

[0014] Among them, 100, negative pressure cooling component, 200, coolant spray component, 300, high-pressure vacuum pump, 400, coolant pump, 500, machine tool table, 101, tool sleeve, 102, fixed frame, 103, tool through hole, 104, internal cavity, 105, bottom air inlet, 106, side air outlet, 107, filter, 108, slot, 109, hoop, 110, telescopic rod, 111, fastening screw, 201, annular coolant container, 202, coolant nozzle, 203, liquid inlet, 301, vacuum pump hose, 401, cooling pump hose, 501, machine tool, 502, tool head.

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0018] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, this embodiment is used to cool down a machine tool tool 501 on a machine tool table 500. The structure includes a negative pressure cooling component 100, a coolant spraying component 200 and a high-pressure vacuum pump 300. The negative pressure cooling component 100 is arranged on the machine tool tool 501. The coolant spraying component 200 is configured to spray coolant toward the machine tool tool 501. The negative pressure cooling component 100 generates a negative pressure environment on the machine tool tool 501, thereby generating an upward attraction on the machine tool tool 501. When in use, the coolant spraying component 200 sprays The coolant on the machine tool tool 501 is subjected to the upward attraction generated by the negative pressure cooling component 100. This attraction offsets a part of the coolant's own gravity, reduces the downward force on the coolant, and thus slows down the coolant's falling speed. At the same time, due to the surface tension of the liquid, the coolant adheres to the surface of the machine tool tool 501, thereby increasing the contact time between the unit coolant and the machine tool tool 501. The coolant spraying component 200 can correspondingly reduce the amount of coolant sprayed per unit time, thereby reducing coolant loss.

[0019] The specific structure of the negative pressure cooling component 100 is a tool sleeve 101, which is provided with a tool through hole 103. The tool sleeve 101 is sleeved on the machine tool tool 501 through the tool through hole 103. The machine tool tool 501 passes through the tool through hole 103. The interior of the tool sleeve 101 is provided with an internal cavity 104. The bottom of the tool sleeve 101 is provided with a plurality of bottom air inlets 105. The plurality of bottom air inlets 105 are arranged in a circular array with the tool through hole 103 as the center of the circle on the tool sleeve 101. The bottom air inlet 105 is connected to the internal cavity 104, and the internal cavity 104 is connected to the high pressure The vacuum pump 300 is connected, and the high-pressure vacuum pump 300 is configured to create a negative pressure environment in the internal cavity 104. When in use, the coolant spraying assembly 200 sprays coolant onto the machine tool tool 501, and the high-pressure vacuum pump 300 draws air from the internal cavity 104, so that the pressure in the internal cavity 104 is reduced. Therefore, the air outside the tool sleeve 101 enters the internal cavity 104 through the bottom air inlet 105, and at the same time generates an upward attraction for the coolant sprayed by the coolant spraying assembly 200, offsetting a part of the gravity on the coolant, thereby delaying the fall of the coolant on the machine tool tool 501.

[0020] This embodiment installs the tool sleeve 101 on the machine tool tool 501, which is suitable for a machine tool table 500 for various machining purposes. When in use, the tool sleeve 101 will move synchronously with the machine tool tool 501 to achieve automatic following of the tool sleeve 101. There is no need to set up an additional mechanism to control the position of the tool sleeve 101, and the structure is simpler.

[0021] In this embodiment, a high-pressure vacuum pump 300, an internal cavity 104 and a bottom air inlet 105 are provided to generate a negative pressure environment around the machine tool tool 501, and the attraction generated by the negative pressure is used to offset a portion of the coolant's own gravity, thereby reducing the combined force on the coolant and slowing down the flow rate of the coolant, thereby increasing the contact time between the coolant and the machine tool tool 501 and reducing the amount and loss of the coolant.

[0022] like Figure 2 As shown, the negative pressure cooling assembly 100 of this embodiment also includes a fixed connecting frame 102, and the tool sleeve 101 is connected to the machine tool table 500 through the fixed connecting frame 102. The tool sleeve 101 is provided to connect the tool sleeve 101, thereby improving the stability of the tool sleeve 101 and making the connection between the tool sleeve 101 and the machine tool tool 501 more firmly.

[0023] At the same time, a side air outlet 106 is provided on the side of the tool sleeve 101 of the present embodiment, and the side air outlet 106 is connected to the internal cavity 104. A vacuum pump hose 301 is provided on the high-pressure vacuum pump 300, and the two ends of the vacuum pump hose 301 are respectively connected to the high-pressure vacuum pump 300 and the side air outlet 106. The high-pressure vacuum pump 300 is connected to the internal cavity 104 through the vacuum pump hose 301 and the side air outlet 106. When the high-pressure vacuum pump 300 is working, the air in the internal cavity 104 is sucked into the high-pressure vacuum pump 300 through the side air outlet 106 and the vacuum pump hose 301 in turn.

[0024] When this embodiment is in use, the high-pressure vacuum pump 300 is started to work, and the high-pressure vacuum pump 300 extracts the air in the internal cavity 104, forming a negative pressure environment in the internal cavity 104, and the air outside the internal cavity 104 enters the internal cavity 104 through the bottom air inlet 105 to achieve the attraction of the coolant; by setting a vacuum pump hose 301 to connect the high-pressure vacuum pump 300 and the internal cavity 104, the high-pressure vacuum pump 300 can be arranged in different positions, and at the same time, the tool sleeve 101 can be allowed to move freely.

[0025] like Figure 8 As shown, the fixed connecting frame 102 in this embodiment includes a sleeve 109 and a telescopic rod 110. The two ends of the telescopic rod 110 are respectively connected to the tool sleeve 101 and the sleeve 109. The sleeve 109 is sleeved on the machine tool table 500, and a plurality of fastening screws 111 are provided on the sleeve 109. The fastening screws 111 bolt the sleeve 109 to the machine tool table 500 to achieve a stable connection between the sleeve 109 and the machine tool table 500 to avoid loosening during operation.

[0026] The telescopic rod 110 in this embodiment is a rod with variable length. By adjusting the length of the telescopic rod 110, the distance between the tool sleeve 101 and the machine tool table 500 can be changed. The distance between the tool sleeve 101 and the machine tool table 500 is adjusted according to the length of the machine tool tool 501, so that the tool sleeve 101 is close to the end of the machine tool tool 501, thereby achieving a better cooling effect.

[0027] When this embodiment is used for a machine tool tool 501 with a longer length, the end of the machine tool tool 501 is far away from the machine tool table 500. At this time, the sleeve 109 is bolted to the machine tool table 500 using the fastening screw 111, and then the length of the telescopic rod 110 is lengthened. The tool sleeve 101 at the other end of the telescopic rod 110 gradually moves away from the machine tool table 500 until the tool sleeve 101 is close to the end of the machine tool tool 501. The end of the machine tool tool 501 can be cooled. When used for a machine tool tool 501 with a shorter length, the length of the telescopic rod 110 can be shortened in the same way.

[0028] like Figure 5 As shown, a filter screen 107 is provided in the internal cavity 104 of the present embodiment, and the filter screen 107 divides the internal cavity 104 into two parts, wherein the upper half of the internal cavity 104 is connected with the side air outlet 106, and the lower half of the internal cavity 104 is connected with the bottom air inlet 105. When the high-pressure vacuum pump 300 is working, the air in the internal cavity 104 is extracted from the side air outlet 106. At this time, the air flow direction of the internal cavity 104 is from the lower half through the filter screen 107 into the upper half.

[0029] When the present embodiment is in use, since the high-pressure vacuum pump 300 extracts air from the internal cavity 104, a large amount of air from the outside of the internal cavity 104 flows into the internal cavity 104 through the bottom air inlet 105. The air may be mixed with coolant particles and some metal debris generated when the machine tool cutter 501 is working. In order to prevent these particles and debris from entering the machine tool table 500 and affecting the service life of the machine tool table 500, a filter 107 is provided in the internal cavity 104 to intercept them. The filter 107 filters out the coolant particles and metal debris mixed in the air.

[0030] At the same time, since the air passes through the filter 107 from bottom to top, when the high-pressure vacuum pump 300 stops working, the air in the internal cavity 104 stops flowing, and the debris filtered by the filter 107 can fall naturally due to gravity, thereby reducing the cleaning frequency of the filter 107.

[0031] like Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, the coolant spray assembly 200 of this embodiment includes an annular coolant container 201 and a coolant nozzle 202. The coolant nozzle 202 is arranged at the bottom of the annular coolant container 201, and a plurality of coolant nozzles 202 are arranged in a circular array along the annular coolant container 201. When the coolant nozzles 202 arranged along the circular array spray coolant, the machine tool tool 501 can be evenly cooled around.

[0032] The bottom end of the machine tool tool 501 in this embodiment is equipped with a cutter head 502, which is used to directly contact the workpiece. Directing the nozzle direction of the coolant nozzle 202 toward the cutter head 502 can ensure that the coolant sprayed by the coolant nozzle 202 directly contacts the cutter head 502, thereby improving the cooling effect.

[0033] When in use, the plurality of coolant nozzles 202 of this embodiment spray the coolant uniformly around the cutter head 502 , and then the tool sleeve 101 generates a negative pressure area to attract the coolant upward, thereby uniformly cooling the machine tool 501 and the cutter head 502 .

[0034] like Figure 2 As shown, this embodiment also includes a coolant pump 400, on which a cooling pump hose 401 is provided. The coolant pump 400 is connected to the liquid inlet 203 through the cooling pump hose 401, and the liquid inlet 203 is connected to the annular coolant container 201. The coolant pump 400 is arranged to replenish the coolant in the annular coolant container 201 when working, so as to ensure sufficient supply of coolant.

[0035] At the same time, this embodiment uses a coolant pump 400 to replenish the coolant in the annular coolant container 201 and pressurize the coolant input into the annular coolant container 201, so that the annular coolant container 201 is always in a high-pressure state. The coolant in the annular coolant container 201 has a certain initial velocity when it is sprayed out from the coolant nozzle 202, ensuring that the coolant can be accurately sprayed onto the cutter head 502.

[0036] like Figure 5 and Figure 8 As shown, a slot 108 is provided on the outer surface of the tool sleeve 101 of this embodiment, and the slot 108 is close to the bottom of the tool sleeve 101. The annular coolant container 201 is snap-fitted and arranged in the slot 108. In this embodiment, the annular coolant container 201 is arranged on the tool sleeve 101, so that the annular coolant container 201 can move with the tool sleeve 101 when the tool sleeve 101 is working, thereby improving the overall integration of the device. The annular coolant container 201 is arranged at a position close to the bottom of the tool sleeve 101, so that the coolant nozzle 202 can spray and cool the machine tool 501.

[0037] like Figure 8As shown, in this embodiment, the bottom of the tool sleeve 101 is an inwardly concave curved surface, and the bottom air inlet 105 is arranged on the curved surface. At the same time, the machine tool tool 501 and the tool head 502 are located at the center of the depression; the bottom of the tool sleeve 101 is set as an inwardly concave curved surface, so that the bottom edge of the tool sleeve 101 is higher than the center, and the bottom air inlet 105 is set on the curved surface between the bottom edge and the center of the tool sleeve 101. When the high-pressure vacuum pump 300 draws air through the bottom air inlet 105, a negative pressure environment of the region can be formed in the above-mentioned concave space, thereby increasing the attraction for the coolant, increasing the effect of delaying the falling speed of the coolant, and thereby reducing the amount and loss of the coolant.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0040] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A tool cooling device for a numerically controlled machine tool, mounted on a machine tool table (500) and a machine tool tool (501), characterized in that: It comprises a negative pressure cooling component (100), a coolant spraying component (200) and a high-pressure vacuum pump (300), wherein the negative pressure cooling component (100) is arranged on a machine tool tool (501), and the coolant spraying component (200) is configured to spray coolant towards the machine tool tool (501); The negative pressure cooling component (100) comprises a tool sleeve (101), wherein the tool sleeve (101) is arranged on a machine tool tool (501), wherein a tool through hole (103) is provided on the tool sleeve (101), wherein the machine tool tool (501) passes through the tool through hole (103), wherein an internal cavity (104) is provided inside the tool sleeve (101), wherein a plurality of bottom air inlets (105) are provided at the bottom of the tool sleeve (101), wherein the plurality of bottom air inlets (105) are arranged on the tool sleeve (101) in a circular array with the tool through hole (103) as the center, wherein the bottom air inlets (105) are in communication with the internal cavity (104), wherein the internal cavity (104) is in communication with a high-pressure vacuum pump (300), and wherein the high-pressure vacuum pump (300) is configured to create a negative pressure environment in the internal cavity (104).

2. The tool cooling device for a CNC machine tool according to claim 1, characterized in that: The negative pressure cooling assembly (100) further comprises a fixed connecting frame (102), the tool sleeve (101) being connected to the fixed connecting frame (102), and the fixed connecting frame (102) being detachably connected to the machine tool table (500); The side of the tool sleeve (101) is provided with a side air outlet (106), and the side air outlet (106) is communicated with the internal cavity (104). The high-pressure vacuum pump (300) is provided with a vacuum pump hose (301), and the two ends of the vacuum pump hose (301) are respectively connected to the high-pressure vacuum pump (300) and the side air outlet (106). The high-pressure vacuum pump (300) is communicated with the internal cavity (104) through the vacuum pump hose (301) and the side air outlet (106).

3. The tool cooling device for a CNC machine tool according to claim 2, characterized in that: The fixed connecting frame (102) comprises a hoop (109) and a telescopic rod (110), two ends of the telescopic rod (110) are respectively connected to the hoop (109) and the telescopic rod (110), a fastening screw (111) is provided on the hoop (109), and the hoop (109) is bolted to the machine tool table (500) via the fastening screw (111).

4. The tool cooling device for a CNC machine tool according to claim 2, characterized in that: A filter screen (107) is provided inside the internal cavity (104), and the filter screen (107) divides the internal cavity (104) into two parts, an upper part and an lower part; the bottom air inlet (105) is located below the filter screen (107), and the side air outlet (106) is located above the filter screen (107).

5. The tool cooling device for a CNC machine tool according to claim 1, characterized in that: The end of the machine tool tool (501) is connected to a tool head (502), and the coolant spraying assembly (200) comprises an annular coolant container (201) and a coolant spray head (202). A plurality of the coolant spray heads (202) are arranged in a circular array at the bottom of the annular coolant container (201), the coolant spray heads (202) are connected to the interior of the annular coolant container (201), and the spray direction of the coolant spray heads (202) points to the position of the tool head (502).

6. The tool cooling device for a CNC machine tool according to claim 5, characterized in that: It also comprises a coolant pump (400), the coolant pump (400) being provided with a coolant pump hose (401), a liquid inlet (203) being provided on the side of the annular coolant container (201), the liquid inlet (203) being communicated with the interior of the annular coolant container (201), the two ends of the coolant pump hose (401) being respectively connected to the coolant pump (400) and the liquid inlet (203), and the interior of the annular coolant container (201) being communicated with the coolant pump (400) via the liquid inlet (203) and the coolant pump hose (401).

7. The tool cooling device for a CNC machine tool according to claim 5, characterized in that: A clamping groove (108) is provided on the outer surface of the tool sleeve (101), the clamping groove (108) is located close to the bottom of the tool sleeve (101), and the annular coolant container (201) is clamped in the clamping groove (108).

8. The tool cooling device for a CNC machine tool according to claim 1, characterized in that: The bottom of the tool sleeve (101) is an inwardly concave curved surface, and the bottom air inlet (105) is arranged on the curved surface.

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