Electric spindle structure of machining center
By designing an annular cavity and cooling pipe structure on the machining center electric spindle, combining water pumps and semiconductor refrigerators, cooling liquid circulation and air flow are achieved, the problem of poor cooling of the electric spindle is solved, cooling efficiency and processing accuracy are improved, and spindle life is extended.
Patent Information
- Application Number
- CN202422534184.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing machining center electric spindle structure has poor cooling effect during high-speed and high load operation, resulting in an increase in temperature and affecting machining accuracy and spindle life.
The cavity and cooling pipe structure distributed in an annular array are adopted, combined with a water pump and a semiconductor refrigerator to realize the circulating cooling of the coolant and air flow, accelerate heat dissipation through the holes and connection holes, and set up a filter to filter and clean the coolant to avoid scale accumulation.
Effectively reduce the temperature of the electric spindle, improve cooling efficiency, reduce heat accumulation, ensure the cleanliness of the coolant, and extend the life of the electric spindle and processing accuracy.
Smart Images
Figure CN223288994U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric spindles, in particular to an electric spindle structure of a machining center. Background Art
[0002] A machining center is a highly automated, multifunctional CNC machine tool equipped with a tool magazine and automatic tool changing device. After the workpiece is clamped once on the machining center, the digital control system can control the machine tool according to different processes, automatically select and replace tools, automatically change the machine tool spindle speed, feed rate, and the movement trajectory of the tool relative to the workpiece, as well as other auxiliary functions, to complete multiple processes on several surfaces of the workpiece in sequence. A vertical machining center refers to a machining center in which the spindle axis is set perpendicular to the worktable. It is mainly suitable for processing complex parts such as plates, discs, molds and small shells. The tool is driven by the electric spindle structure during the machining process.
[0003] The existing electric spindle structures of machining centers mostly use traditional cooling methods, such as natural air cooling or simple liquid cooling. These methods may not provide sufficient cooling effect when running at high speed and high load, causing the electric spindle temperature to rise, affecting the machining accuracy and spindle life. Utility Model Content
[0004] The purpose of the utility model is to provide an electric spindle structure of a machining center, which can facilitate cooling of the electric spindle, thereby solving the problem in the prior art that it is inconvenient to cool the electric spindle.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A motorized spindle structure for a machining center comprises an motorized spindle, a plurality of cavities are distributed in a circular array inside the side wall of the motorized spindle, a cooling pipe is fixedly connected inside the cavity, a cavity and a reflux cavity are respectively provided inside the motorized spindle, the cavity and the reflux cavity are respectively distributed on both sides of the cavity, and the two ends of the cooling pipe are respectively connected to the cavity and the reflux cavity; a box body, the box body is provided at the upper end of the motorized spindle, a water pump is fixedly connected inside the box body, a pipe is fixedly connected to the input end of the water pump, the pipe is connected to the inside of the reflux cavity, the output end of the water pump is connected to the inside of the box body, a plurality of holes and slots are provided between the box body and the cavity, and a filter is provided inside the box body.
[0007] Preferably, a plurality of holes are provided on both sides of the electric spindle, the plurality of holes are arranged at equal intervals, and the plurality of holes on each side are connected to one of the cavities.
[0008] Preferably, a plurality of connection holes are provided between two adjacent cavity side walls, and the plurality of connection holes are equidistantly arranged.
[0009] Preferably, a plurality of semiconductor refrigerators are fixedly connected through the upper end of the box body, and the cooling ends of the semiconductor refrigerators are located inside the box body.
[0010] Preferably, a slot is provided at the upper end of the box body, a column is rotatably connected to the inner thread of the slot, a notch is provided at the lower end of the column, and the inner wall of the notch is fixedly connected to the side wall of the filter screen.
[0011] Preferably, two grooves are fixedly connected to the upper end of the column, and rubber sleeves are provided on the inner walls of the grooves.
[0012] Compared with the prior art, the advantages of the present invention are:
[0013] 1. The coolant inside the box flows into the cavity through multiple holes and slots. At the same time, the coolant inside the cavity is diverted to multiple cooling pipes, thereby cooling the electric spindle. The coolant flowing inside the cooling pipe flows from the other end to the return cavity, and then is pumped into the box through a water pump and a pipe. The return coolant is then cooled by a semiconductor refrigerator. At the same time, the air flow inside the multiple cavities is accelerated by the provided holes and connecting holes, which helps to remove the heat generated by the electric spindle through air convection, reduce heat accumulation, and improve the thermal management efficiency of the entire system. At the same time, the circulating cooling ensures that the coolant always remains at a low temperature, continuously and effectively cooling the electric spindle.
[0014] 2. The coolant that flows back into the box is filtered and cleaned through a filter, and then cooled down through the inside of the box to avoid scale accumulation inside the cooling pipe after long-term use of the coolant, which reduces the heat conduction efficiency and causes blockage inside the cooling pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a front view schematic diagram of the external structure of an electric spindle structure of a machining center proposed by the utility model.
[0016] Figure 2 This is a front sectional structural diagram of an electric spindle structure of a machining center proposed by the utility model.
[0017] Figure 3 The utility model is a schematic side sectional structural diagram of an electric spindle structure of a machining center.
[0018] Figure 4 This is a schematic diagram of the external structure of a box of an electric spindle structure of a machining center proposed by the utility model, viewed from above.
[0019] Figure 5 This is a schematic diagram of the external structure of the column side view of the electric spindle structure of a machining center proposed by the utility model.
[0020] In the figure: 1 electric spindle, 2 cavity, 3 hole, 4 cavity, 5 reflux chamber, 6 cooling pipe, 7 connecting hole, 8 box, 9 water pump, 10 pipeline, 11 hole groove, 12 semiconductor cooler, 13 slot, 14 column, 15 notch, 16 filter, 17 groove. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.
[0022] Reference Figure 1-5 , an electric spindle structure for a machining center, comprising an electric spindle 1, a plurality of cavities 2 are distributed in a circular array inside the side wall of the electric spindle 1, a cooling pipe 6 is fixedly connected to the inside of the cavity 2, a cavity 4 and a reflux cavity 5 are respectively provided inside the electric spindle 1, the cavity 4 and the reflux cavity 5 are respectively distributed on both sides of the cavity 2, and the two ends of the cooling pipe 6 are respectively connected to the cavity 4 and the reflux cavity 5; a box body 8, the box body 8 is provided at the upper end of the electric spindle 1, a water pump 9 is fixedly connected to the inside of the box body 8, the input end of the water pump 9 is fixedly connected to a pipe 10, the pipe 10 is connected to the inside of the reflux cavity 5, the output end of the water pump 9 is connected to the inside of the box body 8, a plurality of holes 11 are provided between the box body 8 and the cavity 4, the box body A filter screen 16 is provided inside the body 8, and a one-way valve is provided inside the hole groove 11. Coolant flows inside the box body 8, and the coolant flows into the cavity 4 through multiple hole grooves 11. At the same time, the coolant inside the cavity 4 is diverted to multiple cooling pipes 6, thereby cooling the electric spindle 1. The coolant flowing inside the cooling pipe 6 flows from the other end to the inside of the reflux chamber 5, and then the coolant is pumped into the box body 8 through the water pump 9 and the pipeline 10. The coolant returning to the inside of the box body 8 is filtered and cleaned through the filter screen 16, and then the coolant is cooled and cooled inside the box body 8 to avoid scale accumulation inside the cooling pipe 6 after long-term use of the coolant.
[0023] Multiple holes 3 are provided on both sides of the electric spindle 1. The multiple holes 3 are arranged at equal distances. The multiple holes 3 on each side are connected to one of the cavities 2. The air flow inside one of the cavities 2 is accelerated through the provided holes 3.
[0024] A plurality of connection holes 7 are provided between the side walls of two adjacent cavities 2, and the plurality of connection holes 7 are arranged at equal intervals. When air circulates inside one cavity 2, the air circulation inside the plurality of cavities 2 is accelerated at the same time through the provided connection holes 7, thereby further reducing the temperature of the electric spindle 1 and reducing heat accumulation.
[0025] A plurality of semiconductor refrigerators 12 are fixedly connected to the upper end of the box body 8 , and the cooling end of the semiconductor refrigerator 12 is located inside the box body 8 . The semiconductor refrigerator 12 cools the cooling liquid inside the box body 8 .
[0026] A slot 13 is provided at the upper end of the box body 8, and a column 14 is connected to the internal thread of the slot 13 by rotation. A slot 15 is provided at the lower end of the column 14, and the inner wall of the slot 15 is fixedly connected to the side wall of the filter 16. When the filter 16 needs to be replaced, the column 14 is screwed out from the internal thread of the slot 13, and then the filter 16 is taken out from the inside of the slot 15 for replacement and cleaning.
[0027] Two grooves 17 are fixedly connected to the upper end of the column 14 . Rubber sleeves are provided on the inner walls of the grooves 17 . The operator extends his fingertips into the grooves 17 and then rotates the column 14 .
[0028] In the present invention, the coolant inside the box body 8 flows into the cavity 4 through multiple holes 11, and at the same time, the coolant inside the cavity 4 is diverted to the inside of multiple cooling pipes 6, thereby cooling the electric spindle 1. The coolant flowing inside the cooling pipe 6 flows from the other end to the inside of the reflux cavity 5, and then the coolant is pumped into the box body 8 through the water pump 9 and the pipeline 10, and then the reflux coolant is cooled by the semiconductor refrigerator 12. At the same time, the air flow inside the multiple cavities 2 is accelerated through the provided holes 3 and the connecting holes 7.
[0029] The coolant flowing back into the box 8 is filtered and cleaned by the filter 16, and then cooled by the box 8 to prevent scale accumulation inside the cooling pipe 6 after long-term use of the coolant. When the filter 16 needs to be replaced, the operator inserts a needle into the groove 17, then rotates the column 14 so that the column 14 is screwed out of the slot 13, and the filter 16 can be removed from the slot 15 for replacement and cleaning. This will reduce the heat transfer efficiency and even block the pipe.
[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An electric spindle structure for a machining center, characterized in that: include An electric spindle (1), wherein a plurality of cavities (2) are distributed in a circular array on the side wall of the electric spindle (1), a cooling pipe (6) is fixedly connected to the inside of the cavity (2), a cavity (4) and a reflow cavity (5) are respectively provided inside the electric spindle (1), the cavity (4) and the reflow cavity (5) are respectively distributed on both sides of the cavity (2), and both ends of the cooling pipe (6) are respectively connected to the cavity (4) and the reflow cavity (5); A box body (8) is provided at the upper end of the electric spindle (1), a water pump (9) is fixedly connected to the interior of the box body (8), an input end of the water pump (9) is fixedly connected to a pipe (10), the pipe (10) is communicated with the interior of the reflux chamber (5), an output end of the water pump (9) is communicated with the interior of the box body (8), a plurality of holes (11) are provided between the box body (8) and the cavity (4), and a filter screen (16) is provided inside the box body (8).
2. The electric spindle structure of a machining center according to claim 1, characterized in that: A plurality of holes (3) are provided on both sides of the electric spindle (1), the plurality of holes (3) are arranged at equal distances, and the plurality of holes (3) on each side are in communication with one of the cavities (2).
3. The electric spindle structure of a machining center according to claim 1, characterized in that: A plurality of connection holes (7) are provided between the side walls of two adjacent cavities (2), and the plurality of connection holes (7) are arranged at equal intervals.
4. The electric spindle structure of a machining center according to claim 1, characterized in that: A plurality of semiconductor coolers (12) are fixedly connected through the upper end of the box body (8), and the cooling ends of the semiconductor coolers (12) are located inside the box body (8).
5. The electric spindle structure of a machining center according to claim 1, characterized in that: The upper end of the box body (8) is provided with a slotted hole (13), the inner thread of the slotted hole (13) is rotatably connected to a column (14), the lower end of the column (14) is provided with a notch (15), and the inner wall of the notch (15) is fixedly connected to the side wall of the filter screen (16).
6. The electric spindle structure of a machining center according to claim 5, characterized in that: The upper end of the column (14) is fixedly connected to two grooves (17), and the inner walls of the grooves (17) are provided with rubber sleeves.