Metal cutting small inner hole machining tool and system thereof

Abstract

The invention relates to the technical field of metal cutting, in particular to a metal cutting small inner hole machining tool and a system thereof.The metal cutting small inner hole machining tool comprises a box body, a door plate, a cutting tool and a cooling assembly, the cooling assembly comprises an inner cooling column, a plurality of heat absorption blocks, a circulating pipe and a plurality of sprayers, the inner cooling column is arranged in the box body, and emulsion flows into the inner cooling column through the circulating pipe; meanwhile, a heat absorption block is in full contact with the cutting tool through a limiting groove so as to absorb heat of the cutting tool, then heat exchange is conducted through the inner cooling column, and circulated emulsified liquid is discharged out of the inner cooling column through the other end of a circulating pipe and then sprayed to the machining positions of the cutting tool and a metal piece through a plurality of spray heads; and cooling is conducted on the exterior of the cutting tool, so that cooled emulsified liquid circulates from the interior of the cutting tool by means of the circulating pipe and the inner cooling column, after the interior of the cutting tool is cooled, spraying cooling is conducted on the exterior of the cutting tool through the spray head, and the cooling effect is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting, in particular to a metal cutting small inner hole machining tool and a system thereof. Background Art

[0002] At present, hole processing is required in the production of metal parts. Among them, cutting tools are usually used for cutting small inner holes. The cutting tools are installed on a robotic arm or mobile device by using bolts, and then the cutting tools are aimed at the metal parts to perform small inner hole cutting processing. At the same time, during cutting, the rapid contact between the tool and the metal part will generate a lot of heat, which is prone to thermal deformation of the metal parts and overheating damage of the tool. Therefore, at present, the tool and the metal part are cooled by spraying emulsion in the contact area between the tool and the metal part.

[0003] In the aforementioned prior art, when cooling the tool, the traditional cooling method is simply to spray emulsion on the outside of the tool. Although it can take away some heat, the emulsion is only in contact with the outer surface of the tool, the heat exchange area is limited, and the cooling effect is limited, which cannot meet the needs of high-speed rotating and frequently used tools. Summary of the invention

[0004] The purpose of the present invention is to provide a metal cutting small inner hole processing tool and its system, so as to solve the problem that in the prior art, when cooling the tool, the traditional cooling method is simply to spray emulsion on the outside of the tool. Although it can take away some heat, the emulsion is only in contact with the outer surface of the tool, the heat exchange area is limited, and the cooling effect is limited, which cannot meet the needs of high-speed rotating and frequently used tools.

[0005] To achieve the above object, the present invention provides a metal cutting small inner hole processing tool, comprising a box, a door plate, a cutting tool and a cooling assembly, wherein the door plate is rotatably connected to the box, and the cutting tool is arranged inside the box;

[0006] The cooling assembly includes an inner cooling column, a plurality of heat absorbing blocks, a circulation pipe and a plurality of nozzles, wherein the inner cooling column is arranged inside the box body, and the plurality of heat absorbing blocks are sequentially distributed around the outside of the inner cooling column, and the cutting tool has a through hole and a plurality of limiting grooves, wherein the through hole is matched with the inner cooling column, and the limiting groove is matched with the heat absorbing block, and the circulation pipe is arranged inside the inner cooling column, and the plurality of nozzles are sequentially distributed outside the cutting tool.

[0007] Wherein, the cooling assembly further comprises a guide unit, and the guide unit is arranged inside the box;

[0008] The guide unit includes a plurality of upper and lower guide components, a transverse guide component, a plurality of front and rear guide components, a connecting block and a transfer slot. The plurality of upper and lower guide components are sequentially arranged on the inner wall of the box body. The output ends of the plurality of upper and lower guide components are fixedly connected to the transverse guide component. The output end of the transverse wire component is fixedly connected to the output ends of the plurality of front and rear guide components. The output ends of the plurality of front and rear guide components are fixedly connected to the connecting block. The transfer block is arranged below the connecting block. The inner cooling column is rotatably connected to the transfer slot and is located below the transfer slot. One end of the circulation pipe passes through the transfer slot and is located inside the inner cooling column. The other end of the circulation pipe is located inside the transfer slot.

[0009] Wherein, the cooling assembly further comprises a plurality of spray units, and the plurality of spray units are sequentially arranged below the transfer tank;

[0010] The spray unit includes a support frame, a spray adjustment component, a spray telescopic hose and an opening and closing mechanism. The support frame is arranged below the transfer tank, the spray adjustment component is arranged on the support frame, the output end of the spray adjustment component is fixedly connected to the spray head, the transfer tank has a drainage hole, the two ends of the spray telescopic hose are respectively connected to the drainage hole and the spray head, and the opening and closing mechanism is arranged at the drainage hole.

[0011] Among them, the opening and closing mechanism includes an opening and closing component and a ball valve, the opening and closing component is arranged outside the transfer tank, the output end of the opening and closing component passes through the transfer tank and is fixedly connected to the ball valve, and the ball valve is arranged inside the drainage hole.

[0012] Wherein, the cooling assembly further comprises a cutting tool driving unit, and the cutting tool driving unit is arranged below the transfer tank;

[0013] The cutting tool driving unit includes a turntable, a cutting tool driving component, a first gear, a second gear and a protective shell. The turntable is rotatably connected to the bottom of the transfer slot, the inner cooling column is fixedly connected to the turntable and is located inside the turntable, the cutting tool driving component is arranged below the transfer slot, the output end of the cutting tool driving component is fixedly connected to the first gear, the second gear is sleeved on the outside of the turntable, the first gear and the second gear are meshed with each other, the protective shell is arranged below the transfer slot, and the cutting tool is bolted to the bottom of the turntable.

[0014] Wherein, the cooling assembly further comprises a clamping unit, and the clamping unit is arranged inside the box;

[0015] The clamping unit includes a placing mechanism, a bidirectional screw machine, two clamping blocks and two pressing mechanisms. The bidirectional screw machine is arranged on the inner bottom wall of the box body, the placing mechanism is erected above the bidirectional screw machine, the two clamping blocks are symmetrically arranged at the output end of the bidirectional screw machine, and the two pressing mechanisms are respectively arranged on the corresponding clamping blocks.

[0016] The placing mechanism comprises a placing chute, a placing seat and a placing seat rotating component, wherein the placing chute is mounted above the bidirectional screw machine, the placing seat is rotatably connected to the placing chute and is located above the placing chute, the placing seat rotating component is arranged below the placing chute, and the output end of the placing seat rotating component passes through the placing chute and is fixedly connected to the placing seat;

[0017] The pressing mechanism includes a pressing plate and a pressing plate pushing component, the pressing plate is rotatably connected to the clamping block, the pressing plate pushing component is rotatably connected to the upper side of the clamping block, and the output end of the pressing plate pushing component is rotatably connected to one end of the pressing plate.

[0018] Wherein, the cooling assembly further comprises a storage unit, and the storage unit is arranged inside the box;

[0019] The storage unit includes a liquid storage tank, a refrigerator, an infusion pump, an infusion telescopic hose, a sealing ring, a collection box, a filter plate, a reflux pump and a reflux pipe, the liquid storage tank is arranged on the inner wall of the box body, the refrigerator is arranged on one side of the liquid storage tank, the infusion pump is arranged at one end of the liquid storage tank, one end of the infusion telescopic hose is connected with the liquid outlet end of the infusion pump, the other end of the infusion telescopic hose passes through the connecting block and is rotatably connected with one end of the circulation pipe, the other end of the infusion telescopic hose is sleeved on the outside of the circulation pipe, the sealing ring is arranged at the rotational connection between the infusion telescopic hose and the circulation pipe, the collection box is arranged below the placement chute, the filter plate is bolted to the collection box, the reflux pump is arranged inside the collection box and is located on one side of the filter plate, and the two ends of the reflux pipe are respectively connected with the reflux pump and the liquid storage tank.

[0020] The present invention also provides a metal cutting small inner hole processing system, which uses the metal cutting small inner hole processing tool as described above.

[0021] A metal cutting small inner hole processing tool and its system of the present invention, after the cutting tool is installed on the outside of the inner cooling column, the door panel is opened, the metal part is placed in the box, and the small inner hole cutting processing is performed by the cutting tool. At this time, the emulsion flows into the inner cooling column through the circulation pipe to cool the inner cooling column. At the same time, the heat absorption block fully contacts with the cutting tool through the limiting groove, thereby absorbing its heat, and then performs heat exchange through the inner cooling column. The circulated emulsion is discharged from the inner cooling column through the other end of the circulation pipe, and then sprayed on the processing position of the cutting tool and the metal part through the multiple nozzles to cool the outside of the cutting tool.

[0022] Through the above-mentioned structural arrangement, relying on the effects of the circulation pipe and the internal cooling column, the cooled emulsion is circulated from the inside of the cutting tool. After the inside of the cutting tool is cooled down, the outside of the cutting tool is sprayed and cooled down through the nozzle, so that the emulsion is in full contact with the cutting tool, thereby greatly improving the cooling effect. In addition, the emulsion sprayed on the outside of the cutting tool can also take away the chips generated by cutting and lubricate the cutting area, thereby making full use of the emulsion and meeting the needs of the cutting tool for high-speed rotation and frequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a cross-sectional view of the entire present invention.

[0026] Figure 3 It is the internal structure diagram of the box of the present invention.

[0027] Figure 4 is a cross-sectional view of a cutting tool according to the present invention.

[0028] Figure 5 The present invention Figure 3 A magnified view of the local structure at A.

[0029] Figure 6 The present invention Figure 4 Enlarged view of the local structure at point B.

[0030] Figure 7 The present invention Figure 4 Enlarged view of the local structure at location C.

[0031] Figure 8It is a schematic structural diagram of a cutting tool of the present invention.

[0032] 1-box, 2-door panel, 3-cutting tool, 4-cooling column, 5-heat absorbing block, 6-circulating pipe, 7-sprinkler, 8-through hole, 9-limiting groove, 10-upper and lower guide parts, 11-lateral guide parts, 12-front and rear guide parts, 13-connecting block, 14-transfer groove, 15-support frame, 16-spray adjustment parts, 17-spray telescopic hose, 18-drain hole, 19-opening and closing parts, 20-ball valve, 21-turntable, 22-cutting tool The tool comprises a driving component, 23-a first gear, 24-a second gear, 25-a protective shell, 26-a bidirectional screw machine, 27-a clamping block, 28-a chute, 29-a seat, 30-a rotating component of the seat, 31-a pressing plate, 32-a pressing plate pushing component, 33-a liquid storage tank, 34-a refrigerator, 35-an infusion pump, 36-an infusion telescopic hose, 37-a sealing ring, 38-a collection box, 39-a filter plate, 40-a reflux pump, and 41-a reflux pipe. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0034] See also Figures 1 to 8 The present invention provides a metal cutting small inner hole processing tool, including a box body 1, a door panel 2, a cutting tool 3 and a cooling assembly, the cooling assembly includes an inner cooling column 4, a plurality of heat absorption blocks 5, a circulation pipe 6 and a plurality of nozzles 7, the cooling assembly also includes a guide unit, the guide unit includes a plurality of upper and lower guide components 10, a transverse guide component 11, a plurality of front and rear guide components 12, a connecting block 13 and a transfer groove 14, the cooling assembly also includes a plurality of spray units, the spray unit includes a support frame 15, a spray adjustment component 16, a spray telescopic hose 17 and an opening and closing mechanism, the opening and closing mechanism includes an opening and closing component 19 and a ball valve 20, the cooling assembly also includes a cutting tool 3 drive unit, the The cutting tool 3 drive unit includes a turntable 21, a cutting tool drive component 22, a first gear 23, a second gear 24 and a protective shell 25. The cooling component also includes a clamping unit, which includes a placement mechanism, a bidirectional screw machine 26, two clamping blocks 27 and two pressing mechanisms. The placement mechanism includes a placement chute 28, a placement seat 29 and a placement seat rotating component 30. The pressing mechanism includes a pressing plate 31 and a pressing plate pushing component 32. The cooling component also includes a storage unit, which includes a liquid storage tank 33, a refrigerator 34, an infusion pump 35, an infusion telescopic hose 36, a sealing ring 37, a collection box 38, a filter plate 39, a reflux pump 40 and a reflux pipe 41.

[0035] Among them, the door panel 2 is rotatably connected to the box body 1, the cutting tool 3 is arranged inside the box body 1, the internal cooling column 4 is arranged inside the box body 1, and multiple heat absorption blocks 5 are distributed in sequence around the outside of the internal cooling column 4. The cutting tool 3 has a through hole 8 and multiple limiting grooves 9, the through hole 8 and the internal cooling column 4 are mutually adapted, the limiting grooves 9 and the heat absorption blocks 5 are mutually adapted, the circulation pipe 6 is arranged inside the internal cooling column 4, and multiple nozzles 7 are distributed in sequence on the outside of the cutting tool 3. After the cutting tool 3 is installed on the outside of the inner cooling column 4, the door panel 2 is opened, the metal part is placed in the box body 1, and the cutting tool 3 is used to perform small inner hole cutting processing. At this time, the emulsion flows into the inner cooling column 4 through the circulation pipe 6 to cool the inner cooling column 4. At the same time, the heat absorption block 5 is in full contact with the cutting tool 3 through the limiting groove 9, thereby absorbing its heat, and then heat exchange is performed through the inner cooling column 4. The circulated emulsion is discharged from the inner cooling column 4 through the other end of the circulation pipe 6, and then sprayed on the processing area of ​​the cutting tool 3 and the metal part through the multiple nozzles 7 to cool the outside of the cutting tool 3.

[0036] Secondly, the guide unit is arranged inside the box body 1; the multiple upper and lower guide components 10 are arranged on the inner wall of the box body 1 in sequence, the output ends of the multiple upper and lower guide components 10 are fixedly connected to the transverse guide component 11, the output end of the transverse wire component is fixedly connected to the output ends of the multiple front and rear guide components 12, the output ends of the multiple front and rear guide components 12 are fixedly connected to the connecting block 13, the transfer block is arranged below the connecting block 13, the inner cooling column 4 is rotatably connected to the transfer slot 14, and is located below the transfer slot 14, one end of the circulation pipe 6 passes through the transfer slot 14, and is located inside the inner cooling column 4, and the other end of the circulation pipe 6 is located inside the transfer slot 14. The upper and lower guide components 10 are electric slide rails, the transverse guide components 11 are electric slide rails, and the front and rear guide components 12 are self-locking cylinders; the upper and lower guide components 10 can drive the transfer trough 14 and the cutting tool 3 to move up and down, the transverse guide components 11 can drive the transfer trough 14 and the cutting tool 3 to move laterally, and the front and rear guide components 12 can drive the transfer trough 14 and the cutting tool 3 to move forward and backward, thereby adjusting the transfer trough 14 and the cutting tool 3 in multiple directions, and small inner hole cutting can be performed on different positions of metal parts.

[0037] At the same time, the plurality of spray units are sequentially arranged below the transfer tank 14; the support frame 15 is arranged below the transfer tank 14, the spray adjustment component 16 is arranged on the support frame 15, the output end of the spray adjustment component 16 is fixedly connected to the nozzle 7, the transfer tank 14 has a drainage hole 18, and the two ends of the spray telescopic hose 17 are respectively connected to the drainage hole 18 and the nozzle 7, and the opening and closing mechanism is arranged at the drainage hole 18. The support frame 15 supports the spray adjustment component 16, and the spray adjustment component 16 is a self-locking electric push rod; when the spray adjustment component 16 is started, it drives the spray head 7 to move and adjust the spray position. At the same time, the spray telescopic hose 17 follows the telescopic movement. When the spray head 7 is close to the cutting tool 3, the emulsion is sprayed from top to bottom on the outside of the cutting tool 3, thereby cooling the cutting tool 3 to the maximum extent and taking away the chips on the outer surface of the cutting tool 3; when the spray head 7 is away from the cutting tool 3, the spray head 7 can be aimed at the cutting area, thereby lubricating and removing chips at the cutting area.

[0038] In addition, the opening and closing component 19 is arranged outside the transfer tank 14, and the output end of the opening and closing component 19 passes through the transfer tank 14 and is fixedly connected to the ball valve 20, and the ball valve 20 is arranged inside the drainage hole 18. The opening and closing component 19 is a self-locking motor; when the emulsion flows in the circulation pipe 6, it is sprayed out from the other end of the circulation pipe 6 and is located inside the transfer tank 14. At this time, the opening and closing component 19 is started, driving the ball valve 20 to rotate, and then opening the drainage hole 18. At this time, the emulsion inside the transfer tank 14 can flow to the spray telescopic hose 17 through the drainage hole 18, and then spray out from the spray head 7.

[0039] Then, the cutting tool 3 driving unit is arranged below the transfer groove 14; the turntable 21 is rotatably connected to the bottom of the transfer groove 14, the internal cooling column 4 is fixedly connected to the turntable 21 and is located inside the turntable 21, the cutting tool driving component 22 is arranged below the transfer groove 14, the output end of the cutting tool driving component 22 is fixedly connected to the first gear 23, the second gear 24 is sleeved on the outside of the turntable 21, the first gear 23 and the second gear 24 are meshed with each other, the protective shell 25 is arranged below the transfer groove 14, and the cutting tool 3 is bolted to the bottom of the turntable 21. The cutting tool driving component 22 is a motor. When the cutting tool driving component 22 is started, it drives the first gear 23 to rotate, and through meshing, drives the second gear 24 to rotate, thereby causing the turntable 21 to rotate, thereby driving the cutting tool 3 bolted to the turntable 21. Since the inner cooling column 4 is fixedly connected to the turntable 21, the turntable 21 drives the inner cooling column 4 to rotate. At the same time, after the heat absorption block 5 and the limiting groove 9 are matched, the rotation stability can be further guaranteed to avoid the inner cooling column 4 and the cutting tool 3 from rotating out of sync, thereby avoiding the frictional heat generation between the cutting tool 3 and the cooling column 4, and fully ensuring the cooling effect of the inside of the cutting tool 3; in addition, the protective shell 25 protects the bottom of the first gear 23 to avoid contamination by splashing emulsion and chips.

[0040] Again, the clamping unit is arranged inside the box body 1; the bidirectional screw machine 26 is arranged on the inner bottom wall of the box body 1, the placing mechanism is erected above the bidirectional screw machine 26, the two clamping blocks 27 are symmetrically arranged at the output end of the bidirectional screw machine 26, and the two pressing mechanisms are respectively arranged on the corresponding clamping blocks 27. After the bidirectional screw machine 26 is started, the two clamping blocks 27 are driven to move toward each other, thereby clamping and fixing the metal parts.

[0041] In addition, the placing chute 28 is erected above the bidirectional screw machine 26, the placing seat 29 is rotatably connected to the placing chute 28 and is located above the placing chute 28, the placing seat rotating component 30 is arranged below the placing chute 28, the output end of the placing seat rotating component 30 passes through the placing chute 28 and is fixedly connected to the placing seat 29; the pressing plate 31 is rotatably connected to the clamping block 27, the pressing plate pushing component 32 is rotatably connected to the top of the clamping block 27, and the output end of the pressing plate pushing component 32 is rotatably connected to one end of the pressing plate 31. After the metal part is clamped and fixed, the output end of the pressing plate pushing component 32 extends out, thereby driving the pressing plate 31 to rotate, so that the other end of the pressing plate 31 presses from above the metal part, reinforcing the installation and fixation of the metal part to avoid loosening and deviation during cutting; when the metal part is processed, the metal part is placed on the placement seat 29 for clamping and fixing, and then the sprayed emulsion falls into the placement chute 28; when the angle of the metal part needs to be adjusted, it is first clamped and pressed, and the placement seat rotating component 30 is started, driving the placement seat 29 and the metal part to rotate, thereby adjusting the cutting position; the placement seat rotating component 30 is a self-locking motor, and the pressing plate pushing component 32 is a self-locking electric push rod.

[0042] Finally, the liquid storage tank 33 is arranged on the inner wall of the box body 1, the refrigerator 34 is arranged on one side of the liquid storage tank 33, the infusion pump 35 is arranged at one end of the liquid storage tank 33, one end of the infusion telescopic hose 36 is connected to the liquid outlet end of the infusion pump 35, the other end of the infusion telescopic hose 36 passes through the connecting block 13 and is rotatably connected to one end of the circulation pipe 6, the other end of the infusion telescopic hose 36 is sleeved on the outside of the circulation pipe 6, the sealing ring 37 is arranged at the rotational connection between the infusion telescopic hose 36 and the circulation pipe 6, the collecting box 38 is arranged below the placement chute 28, the filter plate 39 is bolted to the collecting box 38, the reflux pump 40 is arranged inside the collecting box 38 and is located on one side of the filter plate 39, and the two ends of the reflux pipe 41 are respectively connected to the reflux pump 40 and the liquid storage tank 33. The liquid storage tank 33 stores an emulsion, which is pumped out by the infusion pump 35, enters the infusion telescopic hose 36, and then enters the circulation pipe 6. When the inner cooling column 4 rotates, it drives the circulation pipe 6 to rotate inside the infusion telescopic hose 36. At the same time, the sealing ring 37 plays a sealing role to prevent liquid seepage at the rotating part. After the emulsion is collected by the placement chute 28, it flows obliquely into the collection box 38, and then passes through the filter plate 39 to filter the chips in the emulsion. After the filter plate 39 has been used for a period of time, it is also replaced and maintained. The filtered emulsion is pumped into the reflux pipe 41 by the reflux pump 40 and returns to the liquid storage tank 33 for repeated use.

[0043] When using a metal cutting small inner hole processing tool of the present embodiment, after the cutting tool 3 is installed on the outside of the inner cooling column 4, the door panel 2 is opened, the metal part is placed in the box body 1, and the small inner hole cutting processing is performed by the cutting tool 3. At this time, the emulsion flows into the inner cooling column 4 through the circulation pipe 6 to cool the inner cooling column 4. At the same time, the heat absorption block 5 fully contacts with the cutting tool 3 through the limiting groove 9, thereby absorbing its heat, and then heat exchange is performed through the inner cooling column 4. The circulated emulsion is discharged from the inner cooling column 4 through the other end of the circulation pipe 6 and is located inside the transfer tank 14. At this time, the opening and closing component 19 is started. The ball valve 20 is driven to rotate, thereby opening the drain hole 18. At this time, the emulsion in the transfer tank 14 can flow to the spray telescopic hose 17 through the drain hole 18, and then spray out from the spray head 7, spraying on the processing part of the cutting tool 3 and the metal part to cool the outside of the cutting tool 3; the sprayed emulsion falls into the placement chute 28, obliquely flows into the collection box 38, and then passes through the filter plate 39 to filter the chips in the emulsion. When the filter plate 39 is used for a period of time, it is also replaced and maintained. The filtered emulsion is pumped into the reflux pipe 41 through the reflux pump 40 and returned to the liquid storage tank 33 for repeated use;

[0044] Through the above-mentioned structural arrangement, relying on the circulation pipe 6 and the internal cooling column 4, the cooled emulsion is circulated from the inside of the cutting tool 3. After the inside of the cutting tool 3 is cooled, the outside of the cutting tool 3 is sprayed and cooled through the nozzle 7, so that the emulsion is in full contact with the cutting tool 3, which greatly improves the cooling effect; in addition, the emulsion is sprayed on the outside of the cutting tool 3, which can also take away the chips generated by cutting and lubricate the cutting part, making full use of the emulsion, thereby meeting the high-speed rotation and frequent use of the cutting tool 3.

[0045] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A metal cutting small inner hole processing tool, comprising a box, a door panel and a cutting tool, wherein the door panel is rotatably connected to the box, and the cutting tool is arranged inside the box, characterized in that: Also included is a cooling assembly; The cooling assembly includes an inner cooling column, a plurality of heat absorbing blocks, a circulation pipe and a plurality of nozzles, wherein the inner cooling column is arranged inside the box body, and the plurality of heat absorbing blocks are sequentially distributed around the outside of the inner cooling column, and the cutting tool has a through hole and a plurality of limiting grooves, wherein the through hole is matched with the inner cooling column, and the limiting groove is matched with the heat absorbing block, and the circulation pipe is arranged inside the inner cooling column, and the plurality of nozzles are sequentially distributed outside the cutting tool.

2. The metal cutting small inner hole machining tool according to claim 1, characterized in that: The cooling assembly further includes a guide unit, which is arranged inside the box; The guide unit includes a plurality of upper and lower guide components, a transverse guide component, a plurality of front and rear guide components, a connecting block and a transfer slot. The plurality of upper and lower guide components are sequentially arranged on the inner wall of the box body. The output ends of the plurality of upper and lower guide components are fixedly connected to the transverse guide component. The output end of the transverse wire component is fixedly connected to the output ends of the plurality of front and rear guide components. The output ends of the plurality of front and rear guide components are fixedly connected to the connecting block. The transfer block is arranged below the connecting block. The inner cooling column is rotatably connected to the transfer slot and is located below the transfer slot. One end of the circulation pipe passes through the transfer slot and is located inside the inner cooling column. The other end of the circulation pipe is located inside the transfer slot.

3. The metal cutting small inner hole machining tool according to claim 2, characterized in that: The cooling assembly further includes a plurality of spray units, and the plurality of spray units are sequentially arranged below the transfer tank; The spray unit includes a support frame, a spray adjustment component, a spray telescopic hose and an opening and closing mechanism. The support frame is arranged below the transfer tank, the spray adjustment component is arranged on the support frame, the output end of the spray adjustment component is fixedly connected to the spray head, the transfer tank has a drainage hole, the two ends of the spray telescopic hose are respectively connected to the drainage hole and the spray head, and the opening and closing mechanism is arranged at the drainage hole.

4. The metal cutting small inner hole machining tool according to claim 3, characterized in that: The opening and closing mechanism includes an opening and closing component and a ball valve. The opening and closing component is arranged outside the transfer tank. The output end of the opening and closing component passes through the transfer tank and is fixedly connected to the ball valve. The ball valve is arranged inside the drainage hole.

5. The metal cutting small inner hole machining tool according to claim 4, characterized in that: The cooling assembly further includes a cutting tool drive unit, wherein the cutting tool drive unit is disposed below the transfer tank; The cutting tool driving unit includes a turntable, a cutting tool driving component, a first gear, a second gear and a protective shell. The turntable is rotatably connected to the bottom of the transfer slot, the inner cooling column is fixedly connected to the turntable and is located inside the turntable, the cutting tool driving component is arranged below the transfer slot, the output end of the cutting tool driving component is fixedly connected to the first gear, the second gear is sleeved on the outside of the turntable, the first gear and the second gear are meshed with each other, the protective shell is arranged below the transfer slot, and the cutting tool is bolted to the bottom of the turntable.

6. The metal cutting small inner hole machining tool according to claim 5, characterized in that: The cooling assembly further comprises a clamping unit, and the clamping unit is arranged inside the box; The clamping unit includes a placing mechanism, a bidirectional screw machine, two clamping blocks and two pressing mechanisms. The bidirectional screw machine is arranged on the inner bottom wall of the box body, the placing mechanism is erected above the bidirectional screw machine, the two clamping blocks are symmetrically arranged at the output end of the bidirectional screw machine, and the two pressing mechanisms are respectively arranged on the corresponding clamping blocks.

7. The metal cutting small inner hole machining tool according to claim 6, characterized in that: The placing mechanism comprises a placing chute, a placing seat and a placing seat rotating component, wherein the placing chute is mounted above the bidirectional screw machine, the placing seat is rotatably connected to the placing chute and is located above the placing chute, the placing seat rotating component is arranged below the placing chute, and the output end of the placing seat rotating component passes through the placing chute and is fixedly connected to the placing seat; The pressing mechanism includes a pressing plate and a pressing plate pushing component, the pressing plate is rotatably connected to the clamping block, the pressing plate pushing component is rotatably connected to the upper side of the clamping block, and the output end of the pressing plate pushing component is rotatably connected to one end of the pressing plate.

8. The metal cutting small inner hole machining tool according to claim 6, characterized in that: The cooling assembly further includes a storage unit, which is disposed inside the box; The storage unit includes a liquid storage tank, a refrigerator, an infusion pump, an infusion telescopic hose, a sealing ring, a collection box, a filter plate, a reflux pump and a reflux pipe, the liquid storage tank is arranged on the inner wall of the box body, the refrigerator is arranged on one side of the liquid storage tank, the infusion pump is arranged at one end of the liquid storage tank, one end of the infusion telescopic hose is connected with the liquid outlet end of the infusion pump, the other end of the infusion telescopic hose passes through the connecting block and is rotatably connected with one end of the circulation pipe, the other end of the infusion telescopic hose is sleeved on the outside of the circulation pipe, the sealing ring is arranged at the rotational connection between the infusion telescopic hose and the circulation pipe, the collection box is arranged below the placement chute, the filter plate is bolted to the collection box, the reflux pump is arranged inside the collection box and is located on one side of the filter plate, and the two ends of the reflux pipe are respectively connected with the reflux pump and the liquid storage tank.

9. A metal cutting small inner hole processing system, characterized in that: Use the metal cutting small inner hole processing tool as described in claim 8.

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