Lubricating and cooling module and automatic feeding equipment

Abstract

The invention belongs to the technical field of cutting machining, and particularly relates to a lubricating and cooling module and automatic feeding equipment. The lubricating and cooling module comprises an oil mist mixing mechanism, an outer cooling mechanism, an inner cooling mechanism and a three-way valve; the oil mist mixing mechanism is used for preparing cooling oil mist; the outer cooling mechanism comprises an outer cooling guide pipe, the first output end of the outer cooling guide pipe is arranged on the peripheral side of the drilling assembly, and cooling oil mist is sprayed to the exterior of the drilling assembly and the exterior of the machining position through the outer cooling guide pipe. A hollow pipeline is arranged in the drilling assembly in a penetrating mode, the inner cooling mechanism comprises an inner cooling guide pipe, the second output end of the inner cooling guide pipe communicates with the hollow pipeline, and cooling oil mist sequentially passes through the inner cooling guide pipe and the hollow pipeline and is sprayed into the machining position from the machining end of the drilling assembly. The three-way valve is configured to enable the oil mist mixing mechanism to be selectively communicated with the outer cooling guide pipe and / or the inner cooling guide pipe. The three-way valve can change the flow direction of cooling oil mist, and the lubricating and cooling universality of the lubricating and cooling module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting machining, and in particular to a lubrication and cooling module and an automatic feeding device. BACKGROUND

[0002] In modern manufacturing industry, there are a large number of hole making requirements. When machining some complex structure workpieces, it is often necessary to complete the machining requirements in a small space, such as central wing box butt joint holes and flat tail extension section butt joint holes. Digital machine tools cannot meet the accessibility requirements. To solve the above problems, semi-automatic hole making methods such as portable automatic feeding drills are widely used to machine such deep holes.

[0003] The automatic feeding device in the prior art can realize the function of automatic feeding drilling. However, the existing automatic feeding device is usually only equipped with an internal lubrication and cooling mechanism. In conventional cutting machining, the internal lubrication and cooling mechanism is sufficient to realize the lubrication and cooling of the drill bit and the machining position. If the internal lubrication and cooling mechanism and the external lubrication and cooling mechanism are configured at the same time, it will cause a greater cost burden for ordinary machining work. However, when processing complex workpieces, small diameter drill bits are needed, and the small diameter drill bits cannot be installed with an internal lubrication and cooling module. When using small diameter drill bits and tools without internal cooling holes, the external lubrication and cooling module cannot be used for cooling and lubrication.

[0004] That is, the existing automatic feeding device cannot selectively use the internal lubrication and cooling module and / or the external cooling module. SUMMARY

[0005] The present application aims to provide a lubrication and cooling module and an automatic feeding device to solve the problem that the automatic feeding device in the prior art cannot selectively use the external lubrication and cooling mechanism and / or the internal lubrication and cooling mechanism, and the lubrication and cooling universality is poor and has great limitations, thereby improving the lubrication and cooling universality of the automatic feeding device, improving the machining quality of the hole and the tool life, reducing the workpiece rejection rate, and improving the efficiency of the workpiece.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The lubrication and cooling module is used for lubricating and cooling a drilling assembly, and comprises:

[0008] The oil mist mixing mechanism is used for preparing cooling oil mist; the outer cooling mechanism includes an outer cooling conduit, a first output end of the outer cooling conduit is arranged on the side of the drilling assembly, and the cooling oil mist is sprayed outside the drilling assembly and outside the machining position through the outer cooling conduit; a hollow pipeline is arranged through the inside of the drilling assembly, the inner cooling mechanism includes an inner cooling conduit, a second output end of the inner cooling conduit is communicated with the hollow pipeline, and the cooling oil mist is sequentially sprayed inside the machining position from the machining end of the drilling assembly through the inner cooling conduit and the hollow pipeline; the three-way valve is configured to selectively communicate the oil mist mixing mechanism with the outer cooling conduit and / or the inner cooling conduit.

[0009] As an optional technical solution of the lubricating and cooling module, the oil mist mixing mechanism includes an oil mist conduit, the three-way valve includes a first interface, a second interface and a third interface, the first interface is connected with the oil mist conduit, the first interface is provided with a first valve, and the first valve can open or block the oil mist conduit; the second interface is connected with the outer cooling conduit, the second interface is provided with a second valve, and the second valve can open or block the outer cooling conduit; and the third interface is connected with the inner cooling conduit, and the third interface can selectively communicate or not communicate the inner cooling conduit.

[0010] As an optional technical solution of the lubricating and cooling module, the inner cooling conduit includes a tapered pipe end, the third interface is arranged in the tapered pipe end, and the third interface can selectively tightly or not tightly abut against the tapered pipe end to communicate or not communicate the inner cooling conduit.

[0011] The automatic feeding device includes a drilling assembly and the lubricating and cooling module, the drilling assembly includes a drill bit, the drill bit is in rotary feeding motion to machine a workpiece, and the drilling assembly is detachably connected to the lubricating and cooling module.

[0012] As an optional technical solution of the automatic feeding device, the drilling assembly includes a shaft sleeve, one end of the shaft sleeve is connected with a non-machining end of the drill bit, the shaft sleeve is internally provided with a first inner hole, the inner cooling conduit is arranged in the first inner hole, and relative sliding can be generated between the first inner hole and the inner cooling conduit.

[0013] As an optional technical solution of the automatic feeding device, a sealing assembly is arranged between the other end of the shaft sleeve and the inner cooling conduit to seal the gap between the inner cooling conduit and the first inner hole.

[0014] As an optional technical scheme of the automatic feeding device, the sealing assembly comprises a rotary seal, a compression nut and a sealing connecting block, one end of the sealing connecting block is connected with the shaft sleeve, and the compression nut fixes the rotary seal on the other end of the sealing connecting block.

[0015] As an optional technical scheme of the automatic feeding device, the drilling assembly further comprises a drill sleeve, the drill bit penetrates through the drill sleeve, the drill sleeve is arranged in a drill template, an arc-shaped draw hook with two opposite openings is arranged on the side wall of the drill sleeve, two limiters are arranged on the drill template in positions corresponding to the arc-shaped draw hooks, and the two arc-shaped draw hooks respectively hook the two limiters to limit axial displacement between the drill bit and the drill template during rotation.

[0016] As an optional technical scheme of the automatic feeding device, a first through hole is arranged in the drill sleeve, the outer cooling conduit is in communication with the first through hole, and the cooling oil mist is sprayed on the outside of the drill bit and the outside of the machining position through the first through hole.

[0017] As an optional technical scheme of the automatic feeding device, the automatic feeding device further comprises a shell, and the lubricating and cooling module and the drilling assembly are both fixed on the shell.

[0018] The present application has the following beneficial effects:

[0019] The present application provides a lubricating and cooling module, which comprises an oil mist mixing mechanism, an outer cooling mechanism, an inner cooling mechanism and a three-way valve, the oil mist mixing mechanism is used for preparing cooling oil mist; the outer cooling mechanism comprises an outer cooling conduit, a first output end of the outer cooling conduit is arranged on the side of the drilling assembly, and the cooling oil mist is sprayed on the outside of the drilling assembly and the outside of the machining position through the outer cooling conduit; a hollow pipeline is arranged through the inside of the drilling assembly, the inner cooling mechanism comprises an inner cooling conduit, a second output end of the inner cooling conduit is in communication with the hollow pipeline, and the cooling oil mist sequentially passes through the inner cooling conduit and the hollow pipeline and is sprayed on the inside of the machining position from the machining end of the drilling assembly; and the three-way valve is configured to selectively connect the oil mist mixing mechanism with the outer cooling conduit and / or the inner cooling conduit. The lubricating and cooling module uses the three-way valve to change the flow direction of the cooling oil mist according to whether the drilling assembly has an inner cooling hole or not, thereby improving the lubricating and cooling versatility of the lubricating and cooling module.

[0020] The application provides an automatic feeding device, comprising a drilling assembly and a lubricating and cooling module, the drilling assembly comprises a drill bit, the drill bit is in a rotary feeding motion to process a workpiece, and the drilling assembly is detachably connected to the lubricating and cooling module. The automatic feeding device can select to use an external cooling mechanism or an internal cooling mechanism according to whether the drilling assembly has an internal cooling hole or not, and can also use both mechanisms simultaneously, thereby improving the processing versatility of the automatic feeding device, improving the processing quality of holes and the tool life, reducing the workpiece rejection rate, and improving the efficiency of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of an automatic feeding device provided by an embodiment of the application.

[0022] Figure 2 is a partial structural schematic diagram of an automatic feeding device provided by an embodiment of the application.

[0023] In the drawings:

[0024] 100, drilling assembly; 110, drill bit; 120, shaft sleeve; 121, first inner hole; 130, drill sleeve; 131, arc-shaped pull hook; 132, first through hole;

[0025] 210, external cooling mechanism; 211, external cooling conduit; 220, internal cooling mechanism; 221, internal cooling conduit;

[0026] 300, oil mist mixing mechanism; 310, oil mist conduit; 320, storage tank; 330, oil mist mixer; 340, spray pressurizer;

[0027] 400, three-way valve; 410, first interface; 411, first valve; 420, second interface; 421, second valve; 430, third interface;

[0028] 510, first shell; 511, first connecting nut; 520, second shell;

[0029] 600, sealing assembly; 610, rotary seal; 620, compression nut; 630, sealing connecting block; 640, sealing washer;

[0030] 700, drill template; 710, limiting piece. DETAILED DESCRIPTION

[0031] The application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings, not all the structures.

[0032] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise explicitly specified and limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] The automatic feeding device in the prior art can realize the function of automatic feeding drilling, but the existing automatic feeding device is usually only equipped with an internal lubrication cooling mechanism. In conventional cutting processing, the use of the internal lubrication cooling mechanism is sufficient to realize the lubrication and cooling of the drill bit and the processing site. If the internal lubrication cooling mechanism and the external lubrication cooling mechanism are configured at the same time, a greater cost burden will be caused for ordinary processing work. However, when processing complex workpieces, small-diameter drill bits are needed, and small-diameter drill bits cannot be installed with internal lubrication cooling modules. When small-diameter drill bits and tools without internal cooling holes are used, cooling and lubrication cannot be performed when the external lubrication cooling module is missing.

[0036] To solve the above problems, the present embodiment provides a lubrication and cooling module for lubricating and cooling a drilling assembly 100, as shown in Figure 1The lubricating and cooling module comprises an oil mist mixing mechanism 300, an outer cooling mechanism 210, an inner cooling mechanism 220 and a three-way valve 400. The oil mist mixing mechanism 300 is used to prepare cooling oil mist. The outer cooling mechanism 210 comprises an outer cooling conduit 211. A first output end of the outer cooling conduit 211 is arranged on a side of the drill bit 110. The cooling oil mist is sprayed outside the drill bit 110 and outside the machining position through the outer cooling conduit 211. A hollow pipe is arranged through the inside of the drilling assembly 100. The inner cooling mechanism 220 comprises an inner cooling conduit 221. A second output end of the inner cooling conduit 221 is communicated with the hollow pipe. The cooling oil mist is sprayed inside the machining position from the machining end through the inner cooling conduit 221 and the hollow pipe in sequence. The three-way valve 400 is configured to selectively communicate the oil mist mixing mechanism 300 with the outer cooling conduit 211 and / or the inner cooling conduit 221. The lubricating and cooling module uses the three-way valve 400 to change the flow direction of the cooling oil mist according to whether the drilling assembly 100 has an inner cooling hole or not, thereby improving the lubricating and cooling versatility of the lubricating and cooling module.

[0037] The outer cooling conduit 211 and the inner cooling conduit 221 are arranged to remotely deliver the cooling oil mist to the required position, avoid arranging multiple oil mist mixing mechanisms, and make the lubricating and cooling module simpler in structure. The inner cooling conduit 221 is communicated with the hollow pipe in the drill bit 110. The cooling oil mist can lubricate and cool the inside of the drill bit 110 when passing through the hollow pipe, thereby reducing the wear of the drill bit 110.

[0038] Specifically, the oil mist mixing mechanism 300 further comprises an oil mist conduit 310. The three-way valve 400 comprises a first interface 410, a second interface 420 and a third interface 430. The first interface 410 is connected with the oil mist conduit 310. The first interface 410 is provided with a first valve 411. The first valve 411 can open or block the oil mist conduit 310. The second interface 420 is connected with the outer cooling conduit 211. The second interface 420 is provided with a second valve 421. The second valve 421 can open or block the outer cooling conduit 211. The third interface 430 is connected with the inner cooling conduit 221. The third interface 430 can selectively communicate or not communicate with the inner cooling conduit 221. For example, when it is required to close the delivery of the cooling oil mist, the first valve 411 is closed to block the oil mist conduit 310. At this time, no cooling oil mist is delivered in the entire automatic feeding device. When the outer cooling mechanism 210 is not required to be used, the second valve 421 is closed to block the outer cooling conduit 211. At this time, the outer cooling mechanism 210 is disabled.

[0039] Specifically, the inner cooling conduit 221 comprises a tapered pipe end, and the third interface 430 is arranged in the tapered pipe end and can be selectively attached to or detached from the tapered pipe end to communicate or not communicate with the inner cooling conduit 221. In the embodiment, the third interface 430 is provided with a tapered surface to match the shape of the tapered pipe end. Preferably, the tapered surface has an inclination angle of 120°.

[0040] For example, when the drilling assembly 100 is arranged as a small-diameter drill bit or a tool without an inner cooling hole, the three-way valve 400 communicates with the oil mist conduit 310 and the outer cooling conduit 211, and the third interface 430 is not attached to the tapered pipe end to not communicate with the inner cooling conduit 221 and the three-way valve 400, so as to lubricate and cool the outside of the small-diameter drill bit and the tool without the inner cooling hole and the outside of the machining position; when the drilling assembly 100 is arranged as a normal-diameter drill bit or a tool with an inner cooling hole, the three-way valve 400 communicates with the oil mist conduit 310 and the inner cooling conduit 221, and the outer cooling conduit 211 is blocked by the second valve 421, so as to lubricate and cool the inside of the normal-diameter drill bit and the tool with the inner cooling hole and the inside of the machining position.

[0041] Further, the oil mist mixing mechanism 300 comprises a storage tank 320, an oil mist mixer 330 and a spray pressurizer 340. The oil mist mixer 330 draws out and atomizes the cooling oil and the cooling water in the storage tank 320 to prepare cooling oil mist, and the spray pressurizer 340 applies pressure to the cooling oil mist to deliver the cooling oil mist to the three-way valve 400.

[0042] The embodiment also provides an automatic feeding device. Referring to Figure 1 The automatic feeding device comprises the drilling assembly 100 which further comprises a lubricating and cooling module. The drilling assembly 100 comprises a drill bit 110, and in other embodiments, the drilling assembly 100 further comprises a tool which can be used instead of the drill bit 110. The drill bit 110 performs rotational feeding motion to machine a workpiece. The drilling assembly 100 is detachably connected to the lubricating and cooling module. The automatic feeding device can select to use the outer cooling mechanism 210 or the inner cooling mechanism 220 according to whether the drilling assembly 100 has an inner cooling hole or not, or can simultaneously use both mechanisms, thereby improving the machining versatility of the automatic feeding device, improving the machining quality of holes and the tool life, reducing the workpiece rejection rate and improving the efficiency of the workpiece.

[0043] Further, the drilling assembly 100 comprises a shaft sleeve 120, one end of which is connected to the non-machining end of the drill bit 110. The shaft sleeve 120 is internally provided with a first inner hole 121, and the inner cooling conduit 221 is arranged in the first inner hole 121. The first inner hole 121 and the inner cooling conduit 221 can slide and rotate relative to each other. In the embodiment, the inner cooling conduit 221 is made of hard rubber.

[0044] Specifically, the inner cooling conduit 221 and the first inner hole 121 are in clearance fit, so that the relative sliding between the first inner hole 121 and the inner cooling conduit 221 is smoother and scraping is avoided. Preferably, the diameter of the inner cooling conduit 221 is set to 4-6 mm, and the diameter of the first inner hole 121 is set to 6-8 mm.

[0045] In the rotary feed motion, the feed stroke is usually between 60-80 mm, so the linear speed at the friction position of the first inner hole 121 and the inner cooling conduit 221 is preferably 0.785 m / s (rotation speed 300 r / min). At this speed, the wear and heat generated between the inner cooling conduit 221 and the first inner hole 121 are minimized, and the cooling oil mist can also cool and lubricate the inner cooling conduit 221 and the first inner hole 121, reducing wear.

[0046] Further, a sealing assembly 600 is arranged between the other end of the shaft sleeve 120 and the inner cooling conduit 221 to seal the gap between the inner cooling conduit 221 and the first inner hole 121. The cooling oil mist is prevented from leaking from the gap between the inner cooling conduit 221 and the first inner hole 121.

[0047] Specifically, the sealing assembly 600 includes a rotary packing seal 610, a compression nut 620, and a sealing connecting block 630. One end of the sealing connecting block 630 is connected to the shaft sleeve 120, and the compression nut 620 fixes the rotary packing seal 610 to the other end of the sealing connecting block 630. In this embodiment, the sealing assembly 600 further includes a sealing washer 640. The shaft sleeve 120 is provided with a protruding structure, and the protruding structure is provided with external threads. The sealing washer 640 seals the gap between the inner cooling conduit 221 and the first inner hole 121. The sealing connecting block 630 is internally provided with threads, and the sealing connecting block 630 is screwed with the external threads on the protruding structure to be fixed to the shaft sleeve 120 and to compress the sealing washer 640. The rotary packing seal 610 is arranged at the end of the sealing connecting block 630 and is inserted into the gap between the sealing connecting block 630 and the inner cooling conduit 221. The compression nut 620 is screwed with the sealing connecting block 630 to compress the rotary packing seal 610.

[0048] In this embodiment, the sealing washer 640 can be a rubber washer or a raw material band. The sealing assembly 600 rotates and moves with the drill bit 110. The sealing assembly 600 is arranged in a rigid connection manner to make the connection more stable. During the rotary feed process, the sealing assembly 600 will not fall off to affect the delivery of the cooling oil mist

[0049] Further, referring to Figure 2The drilling assembly 100 further comprises a drill sleeve 130, the drill bit 110 penetrates through the drill sleeve 130, the drill sleeve 130 is arranged in the drill template 700, the sidewall of the drill sleeve 130 is provided with two open and opposite arc-shaped draw hooks 131, the drill template 700 is provided with two limiting pieces 710 at positions corresponding to the arc-shaped draw hooks 131, and the two arc-shaped draw hooks 131 respectively hook the two limiting pieces 710 to limit the axial displacement between the drill bit 110 and the drill template 700 during the rotary motion. In the embodiment, the limiting piece 710 is arranged as a draw bolt. In other embodiments, the limiting piece 710 can also be arranged as a stepped rod or a draw hook corresponding to the arc-shaped draw hook 131.

[0050] Further, the drill sleeve 130 is provided with a first through hole 132, the outer cooling conduit 211 communicates with the first through hole 132, and the cooling oil mist is sprayed outside the drill bit 110 and the machining position through the first through hole 132. In the embodiment, the output end of the outer cooling conduit 211 is provided with at least two, and is connected to the drill sleeve 130, and the first through hole 132 corresponding to each output end is arranged in the drill sleeve 130, the first through hole 132 includes two sections, the first section directly connects with the output end of the outer cooling conduit 211, and the second section connects with the first section, and the diameter of the first section is larger than that of the second section. Preferably, the diameter of the first section is 8 mm, the diameter of the second section is 2 mm, and the second section is arranged at an angle inclined to the drill bit 110, so that the cooling oil mist is more concentrated to the drill bit 110.

[0051] Further, the automatic feeding device further comprises a shell, and the lubricating and cooling module and the drilling assembly 100 are fixed to the shell. Specifically, the shell comprises a first shell 510, the first shell 510 is provided with a first connecting nut 511, and the three-way valve 400 is screwed to the first connecting nut 511. The three-way valve 400 is fixed to the first shell 510 by being screwed to the first connecting nut 511, so as to fix the three-way valve 400 and increase the integrity of the automatic feeding device.

[0052] Specifically, the first shell 510 is provided with a first threaded hole, the first connecting nut 511 is provided with a first external thread, the first connecting nut 511 is screwed into the first threaded hole through the first external thread, so as to fix the first connecting nut 511 to the first shell 510, the first connecting nut 511 is provided with a second threaded hole, the periphery of the three-way valve 400 is provided with a second external thread, and the three-way valve 400 is screwed into the second threaded hole through the second external thread, so as to fix the three-way valve 400 in the first connecting nut 511.

[0053] The third interface 430 and the taper pipe end are disposed inside the first connecting nut 511, the three-way valve 400 and the first connecting nut 511 can clamp the taper pipe end together; when the three-way valve 400 is gradually screwed into the first connecting nut 511, the three-way valve 400 and the first connecting nut 511 clamp the taper pipe end, and the cooling oil mist enters the inner cooling conduit 221 through the third interface 430; when the three-way valve 400 is gradually screwed out of the first connecting nut 511, the three-way valve 400 and the first connecting nut 511 loosen the first input end, and the cooling oil mist can flow out through the gap between the three-way valve 400 and the first input end. In the embodiment, the surfaces of the three-way valve 400 and the first connecting nut 511 in contact with the taper pipe end are all set as taper surfaces, and the inclination angles are set as 120°. After the three-way valve 400 and the first connecting nut 511 clamp the first input end, the third interface 430 and the central axis of the inner cooling conduit 221 can also coincide, facilitating the delivery of the cooling oil mist.

[0054] Further, the shell further comprises a second shell 520, the drill sleeve 130 is arranged in the second shell 520 and connected with the second shell 520 through reverse threads, during the rotation of the drill bit 110, the torque is generated between the drill sleeve 130 and the second shell 520, and the reverse threads at the rear of the drill sleeve 130 can make the drill sleeve 130 more tightly connected with the second shell 520.

[0055] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A lubrication and cooling module for lubricating and cooling a drilling assembly (100), characterized in that: include: An oil mist mixing mechanism (300), the oil mist mixing mechanism (300) being used to prepare cooling oil mist; An external cooling mechanism (210), the external cooling mechanism (210) comprising an external cooling conduit (211), a first output end of the external cooling conduit (211) being arranged on a peripheral side of the drilling assembly (100), and the cooling oil mist being sprayed onto the outside of the drilling assembly (100) and the outside of the processing area through the external cooling conduit (211); An internal cooling mechanism (220), wherein a hollow pipeline is provided through the interior of the drilling assembly (100), the internal cooling mechanism (220) comprises an internal cooling conduit (221), a second output end of the internal cooling conduit (221) is in communication with the hollow pipeline, and the cooling oil mist passes through the internal cooling conduit (221) and the hollow pipeline in sequence and is sprayed from the processing end of the drilling assembly (100) into the interior of the processing area; A three-way valve (400) is configured to enable the oil mist mixing mechanism (300) to selectively communicate with the outer cooling conduit (211) and / or the inner cooling conduit (221).

2. The lubrication and cooling module according to claim 1, characterized in that: The oil mist mixing mechanism (300) includes an oil mist conduit (310), and the three-way valve (400) includes a first interface (410), a second interface (420), and a third interface (430). The first interface (410) is connected to the oil mist conduit (310), and the first interface (410) is provided with a first valve (411). The first valve (411) can open or block the oil mist conduit (310); the second interface (420) is connected to the outer cooling conduit (211), and the second interface (420) is provided with a second valve (421). The second valve (421) can open or block the outer cooling conduit (211); the third interface (430) is connected to the inner cooling conduit (221), and the third interface (430) can selectively connect to or disconnect from the inner cooling conduit (221).

3. The lubrication and cooling module according to claim 2, characterized in that: The inner cooling conduit (221) includes a tapered tube end, the third interface (430) is disposed in the tapered tube end, and the third interface (430) can selectively be in close contact with or not in close contact with the tapered tube end to connect or disconnect the inner cooling conduit (221).

4. Automatic feeding device, comprising a drilling assembly (100), characterized in that It also includes a lubrication and cooling module as described in any one of claims 1 to 3, the drilling assembly (100) includes a drill bit (110), the drill bit (110) performs a rotational feed motion to process a workpiece, and the drilling assembly (100) is detachably connected to the lubrication and cooling module.

5. The automatic feeding device according to claim 4, characterized in that: The drilling assembly (100) includes a sleeve (120), one end of which is connected to the non-processing end of the drill bit (110), a first inner hole (121) is provided inside the sleeve (120), the inner cooling conduit (221) is placed in the first inner hole (121), and relative sliding can be generated between the first inner hole (121) and the inner cooling conduit (221).

6. The automatic feeding device according to claim 5, characterized in that: A sealing assembly (600) is provided between the other end of the shaft sleeve (120) and the inner cooling conduit (221) to seal the gap between the inner cooling conduit (221) and the first inner hole (121).

7. The automatic feeding device according to claim 6, characterized in that: The sealing assembly (600) includes a rotary pan-plug seal (610), a compression nut (620) and a sealing connection block (630). One end of the sealing connection block (630) is connected to the shaft sleeve (120), and the compression nut (620) fixes the rotary pan-plug seal (610) to the other end of the sealing connection block (630).

8. The automatic feeding device according to claim 4, characterized in that: The drilling assembly (100) further includes a drill sleeve (130), the drill bit (110) passes through the drill sleeve (130), the drill sleeve (130) is arranged in the drilling template (700), the side wall of the drill sleeve (130) is provided with two arc-shaped hooks (131) with opposite openings, and two limiting members (710) are provided at positions corresponding to the arc-shaped hooks (131) on the drilling template (700), and the two arc-shaped hooks (131) respectively hook the two limiting members (710) to limit the axial displacement between the drill bit (110) and the drilling template (700) during rotational movement.

9. The automatic feeding device according to claim 8, characterized in that: A first through hole (132) is provided in the drill sleeve (130), the external cooling conduit (211) is connected to the first through hole (132), and the cooling oil mist is sprayed onto the outside of the drill bit (110) and the outside of the processing area through the first through hole (132).

10. The automatic feeding device according to claim 4, characterized in that: The automatic feeding device further comprises a housing, and the lubrication cooling module and the drilling assembly (100) are both fixed on the housing.

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