Drilling machine spindle control system and control method thereof

Abstract

The invention belongs to the technical field of drilling machine spindles, and particularly relates to a drilling machine spindle control system and a control method thereof. The control system includes: a drill spindle; the outer cooling circulation assembly provides cooling liquid for the drilling machine spindle during operation; the main shaft temperature detection assembly is arranged on the main shaft shell and used for detecting the heating condition of the main shaft shell; a control circuit formed by a controller, a frequency converter, a contactor and the like is arranged in the control cabinet; the drilling machine spindle comprises a spindle shell which comprises a barrel and shell flanges formed at the two ends of the barrel; the stator component is arranged in the main shaft shell; the rotor part is arranged on the inner side of the stator part; the main shaft body is arranged on the inner side of the rotor part, and two ends respectively extend out of the main shaft shell; the outer cooling ring is arranged outside the main shaft shell; wherein a cutting fluid channel which is coaxially arranged is formed in the middle of the main shaft body.

Description

Technical Field

[0001] The present invention belongs to the technical field of drill spindles, and particularly relates to a control system for a drill spindle and a control method therefor. Background Art

[0002] A drill press refers to a machine tool mainly used for machining holes in workpieces with a drill bit. Usually, the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. The drill press has a simple structure and relatively low machining accuracy. It can drill through holes and blind holes, and by replacing special tools, it can perform operations such as reaming, counterboring, reaming, or tapping. The spindles of traditional drill presses are mostly driven by belts or gears, which affects the transmission efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a control system for a drill spindle and a control method therefor, which have high transmission efficiency and good heat dissipation performance, aiming at the above-mentioned existing technical problems.

[0004] In view of this, the present invention provides a control system for a drill spindle, including: A drill spindle; An external cooling circulation component, which provides coolant for the operation of the drill spindle; A spindle temperature detection component, which is arranged on the spindle housing and is used to detect the heat generation situation of the spindle housing; A control cabinet, which contains a control circuit formed by a controller, an inverter, a contactor, etc.; The drill spindle includes: A spindle housing, including a cylinder body and housing flanges formed at both ends of the cylinder body; A stator component, which is arranged inside the spindle housing; A rotor component, which is arranged inside the stator component; A spindle body, which is arranged inside the rotor component and extends out of the spindle housing at both ends; An external cooling ring, which is arranged outside the spindle housing; Wherein a chip liquid channel is coaxially formed in the middle of the spindle body.

[0005] In the above technical solution, further, the external cooling ring includes: An outer ring body, which is sleeved outside the cylinder body of the spindle housing and forms a cooling cavity between it and the spindle housing; and both ends are respectively abutted against the two housing flanges; A cooling water inlet, which is formed on one of the housing flanges; A cooling water outlet, which is formed on the other housing flange; Wherein the cooling water inlet and the cooling water outlet are respectively communicated with the cooling cavity, and a plurality of cooling grooves are uniformly distributed in a circumferential manner on the outer wall of the spindle housing.

[0006] In the above technical solution, further, the outer cooling ring further includes: A plurality of cooling contact blocks are evenly distributed on the spindle housing along a circumference and are formed with projections for sealing the cooling grooves; A plurality of buffer support members are respectively arranged between the cooling contact block and the outer ring body; The lower floating block is provided on the lower end housing flange where the cooling water inlet is located, is used to block the cooling water inlet, and is formed with an annular groove communicating with the cooling water inlet, and is formed with a communicating hole communicating with the cooling cavity; A plurality of buffer reset parts fix the lower floating block on the end face of the housing flange evenly in a circumference; An extrusion guide portion is formed outside the lower floating block, and a contact portion that cooperates with the extrusion guide portion is formed on the lower side of the cooling contact block. The displacement of the lower floating block drives the protrusion on the cooling contact block to break away from the cooling groove and move toward the outer ring body.

[0007] In the above technical solution, further, the external cooling circulation component includes: Water supply tank, used to store cooling water; A cooling pumping assembly, used for pumping cooling water into the cooling chamber; A cooling component is used to cool the coolant delivered to the cooling chamber; Water tank temperature sensor, used to detect the temperature of cooling water in the water supply tank; Several water inlet temperature sensors for detecting the temperature of cooling water to be input into the cooling chamber; Several water inlet pressure sensors for detecting the water pressure of cooling water to be input into the cooling chamber; Flow control valve, used to control the flow of cooling water input into the cooling chamber; The cooling conveying circuit connects the water supply tank, the cooling pumping component, the cooling and temperature reduction component and the cooling chamber to form a closed-loop cooling circuit.

[0008] In the above technical solution, further, the cooling pumping assembly includes: Main delivery pump, used to deliver cooling water; Auxiliary delivery pump, used to cooperate with the main delivery pump to deliver cooling water; Cooling components: The main cooler is used to cool the cooling water; The secondary cooler is used to cooperate with the primary cooler to achieve cooling effect; Auxiliary cooler, used to cooperate with the main cooler and secondary cooler to achieve cooling effect; Among them, the cooling delivery circuit can control the cooling water to pass through the main delivery pump and / or the auxiliary delivery pump in the cooling pump assembly, and control the cooling water to pass through the main cooler and / or the secondary cooler and / or the auxiliary cooler in the cooling and temperature reduction assembly.

[0009] In the above technical solution, further, the cooling delivery circuit includes: A cooling return water pipeline, connecting the outlet end of the cooling cavity and the inlet end of the water supply water tank; A pump delivery pipeline, including a main delivery pipeline and an auxiliary delivery pipeline connected in parallel. One end after parallel connection is connected to the outlet end of the water supply water tank. The main delivery pump is arranged on the main delivery pipeline, and the auxiliary delivery pump is arranged on the auxiliary delivery pipeline; A cooling delivery pipeline, including a main cooling pipeline, a secondary cooling pipeline and an auxiliary cooling pipeline connected in parallel. One end after parallel connection is connected to the other end of the pump delivery pipeline, and the other end is connected to the inlet end of the cooling cavity; The main cooler is arranged on the main cooling pipeline, the secondary cooler is arranged on the secondary cooling pipeline, and the auxiliary cooler is arranged on the auxiliary cooling pipeline; Among them, an auxiliary pump control valve is arranged on the side of the auxiliary delivery pipeline close to the inlet end of the auxiliary delivery pump; A main cooling control valve is arranged on the side of the main cooling pipeline close to the inlet end of the main cooler, a secondary cooling control valve is arranged on the side of the secondary cooling pipeline close to the inlet end of the secondary cooler, and an auxiliary cooling control valve is arranged on the side of the auxiliary cooling pipeline close to the inlet end of the auxiliary cooler; And the middle of the cooling return water pipeline passes through a cooling tower.

[0010] In the above technical solution, further, The pump delivery pipeline further includes: A pumping switching pipeline, one end of which is connected to the side of the main delivery pipeline connecting the inlet end of the main delivery pump and a main pump switching valve is arranged at this end, and the other end is connected to the side of the auxiliary delivery pipeline connecting the outlet end of the auxiliary delivery pump and a secondary pump switching valve is arranged at this end; The cooling delivery pipeline further includes: A main cooling switching pipeline, one end of which is connected to the part of the main cooling pipeline between the main cooling control valve and the main cooler and a main cooling switching valve is arranged at this end; The other end is connected to the part of the secondary cooling pipeline at the outlet end of the secondary cooler and a main cooling line changing valve is arranged at this end; A secondary cooling switching pipeline, one end of which is connected to the part of the secondary cooling pipeline between the secondary cooling control valve and the secondary cooler and a secondary cooling switching valve is arranged at this end; The other end is connected to the part of the auxiliary cooling pipeline at the outlet end of the auxiliary cooler and a secondary cooling line changing valve is arranged at this end; And a main cooling control valve is arranged on the side of the main cooling pipeline connecting the outlet end of the main cooler. Among them, the main pump switching valve, the secondary pump switching valve, the main cooling switching valve, the main cooling line changing valve, the secondary cooling switching valve and the secondary cooling line changing valve are all three-way electrically controlled valves. The main cooling control valve, the main cooling control valve, the main cooling control valve and the auxiliary pump control valve are two-way electrically controlled valves.

[0011] The beneficial effects of the present invention are: 1. The drill spindle is built into the motor and directly drives the spindle through the motor, which can improve the transmission efficiency, make the spindle structure of the drill more compact, and at the same time eliminate the use of transmission components such as reducers, reducing production costs; 2. A cooling ring is arranged outside the outer spindle housing, and cooling water is conveyed into the cooling ring through the external cooling circulation component, thereby cooling the temperature of the spindle to ensure the service life and performance of the drill spindle; 3. The setting of the external cooling circulation component can ensure the stability and temperature of the cooling water conveyed into the external cooling ring to ensure the performance of the drill spindle; and the set spindle temperature detection component can be used to monitor the heating situation of the spindle, which is convenient for cooling and reducing the temperature of the spindle. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the drill spindle in the present invention; Figure 2 is a schematic longitudinal sectional view of the drill spindle in the present invention; Figure 3 is a schematic transverse sectional view of the drill spindle in the present invention; Figure 4 is a schematic structural diagram of the system of the present invention; Figure 5 The control schematic diagram of the control method of the present invention; the marks in the figure are represented as: 1 - spindle housing, 2 - spindle body, 3 - coolant channel, 4 - outer ring body, 5 - cooling cavity, 6 - cooling water inlet, 7 - cooling water outlet, 8 - cooling contact block, 9 - convex block, 10 - buffer support, 11 - lower floating block, 12 - communication hole, 13 - buffer reset part, 14 - extrusion guiding part, 15 - contact part, 100 - water supply tank, 101 - water tank temperature sensor, 102 - inlet water temperature sensor, 103 - inlet water pressure sensor, 104 - main delivery pump, 105 - auxiliary delivery pump, 106 - main cooler, 107 - secondary cooler, 108 - sub-cooler, 109 - cooling return pipeline, 110 - main pumping pipeline, 111 - auxiliary pumping pipeline, 112 - main cooling pipeline, 113 - secondary cooling pipeline, 114 - sub-cooling pipeline, 115 - auxiliary pump control valve, 116 - main cooling control valve, 117 - secondary cooling control valve, 118 - sub-cooling control valve, 119 - pumping switching pipeline, 120 - main pump switching valve, 121 - secondary pump switching valve, 122 - main cooling switching pipeline, 123 - main cooling switching valve, 124 - main cooling bypass valve, 125 - secondary cooling switching pipeline, 126 - secondary cooling switching valve, 127 - secondary cooling bypass valve, 128 - main cooling control valve, 129 - flow control valve. Detailed Embodiments

[0013] The following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope protected by the present application.

[0014] Embodiment 1: This embodiment provides a control system for a drill press spindle, including: The drill press spindle; An external cooling circulation component, which provides coolant for the operation of the drill press spindle; A spindle temperature detection component, which is arranged on the spindle housing 1 and is used to detect the heat generation condition of the spindle housing 1; A control cabinet, which has a control circuit formed by a controller, an inverter, a contactor, etc. inside; The drill press spindle includes: The spindle housing 1, including a cylinder body and housing flanges formed at both ends of the cylinder body; A stator component, which is arranged inside the spindle housing 1; A rotor component, which is arranged inside the stator component; The spindle body 2, which is arranged inside the rotor component and extends out of the spindle housing 1 at both ends; An external cooling ring, which is arranged outside the spindle housing 1; Wherein a chip coolant channel 3 is formed coaxially in the middle of the spindle body 2.

[0015] In this technical solution, the drill press spindle is built into the motor, and the spindle is directly driven by the motor, which can improve the transmission efficiency, make the spindle structure of the drill press more compact, and at the same time eliminate the use of transmission components such as a speed reducer, reducing the production cost. And a cooling ring is arranged outside the outer spindle housing 1, and cooling water is conveyed into the cooling ring through the external cooling circulation component, so as to cool the temperature of the spindle to ensure the service life and performance of the drill press spindle. The setting of the external cooling circulation component can ensure the stability and temperature of the cooling water conveyed into the external cooling ring to ensure the performance of the drill press spindle; and the set spindle temperature detection component can be used to monitor the heat generation condition of the spindle, which is convenient for cooling and reducing the temperature of the spindle. And the setting of the chip coolant channel 3 can facilitate the input of coolant during drilling, thereby improving the drilling effect.

[0016] Embodiment 2: This embodiment provides a control system for a drill press spindle. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0017] The external cooling ring includes: The outer ring body 4 is sleeved outside the cylinder of the main shaft housing 1, and a cooling cavity 5 is formed between it and the main shaft housing 1; and both ends are respectively abutted against two housing flanges. The cooling water inlet 6 is formed on the housing flange at one end. The cooling water outlet 7 is formed on the housing flange at the other end. Among them, the cooling water inlet 6 and the cooling water outlet 7 are respectively communicated with the cooling cavity 5, and a number of cooling grooves are formed on the outer wall of the main shaft housing 1 and are evenly distributed in a circumferential manner.

[0018] In this technical solution, the outer ring body 4 forms the outer wall of the cooling cavity 5, the main shaft housing 1 becomes the inner wall of the cooling cavity 5, and the two housing flanges form the ends at both ends of the cooling cavity 5. The cooling cavity 5 formed outside the main shaft housing 1 can play a good role in cooling and dissipating heat for the main shaft. The cooling water inlet 6 is arranged on the housing flange at the lower end, and the cooling water outlet 7 is arranged on the housing flange at the upper end, so that after the cooling water is injected into the cooling cavity 5, the cooling cavity 5 is slowly filled from the lower part to the upper part, and then discharged from the cooling water outlet 7, thereby ensuring that the coolant can better cool the main shaft; and the arranged cooling grooves can increase the contact area of the outer surface of the main shaft housing 1 to improve the performance of cooling and heat dissipation.

[0019] Embodiment 3: This embodiment provides a control system for a drill press main shaft. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0020] The outer cooling ring further includes: A number of cooling contact blocks 8 are evenly distributed in a circumferential manner on the main shaft housing 1, and convex blocks 9 for plugging the cooling grooves are formed thereon. A number of buffer support members 10 are respectively arranged between the cooling contact blocks 8 and the outer ring body 4. The lower floating block 11 is arranged on the lower housing flange where the cooling water inlet 6 is located, used for plugging the cooling water inlet 6, and an annular groove communicated with the cooling water inlet 6 is formed thereon, and a communication hole 12 communicated with the cooling cavity 5 is formed thereon. A number of buffer reset members 13 fix the lower floating block 11 on the end face of the housing flange in a circumferential and uniform manner. Among them, an extrusion guiding portion 14 is formed outside the lower floating block 11, and a contact portion 15 matching with the extrusion guiding portion 14 is formed on the lower side of the cooling contact block 8. The displacement of the lower floating block 11 drives the convex block 9 on the cooling contact block 8 to disengage from the cooling groove and displace towards the outer ring body 4.

[0021] In this technical solution, the cooling contact block 8 is provided to fill the cooling cavity 5, reducing the capacity of the cooling cavity 5, and thus improving the circulation efficiency of the coolant when the coolant flows through. The bump 9 formed on the cooling contact block 8 can change the contact surface area between the spindle housing 1 and the cooling cavity 5 during the movement of the cooling contact block 8, ensuring that the spindle can be relatively stably maintained within a certain temperature range according to the heat generation situation of the spindle, and further improving the overall service life of the spindle. The buffer support 10 is provided to elastically press the cooling contact block 8 against the spindle housing 1. The buffer support 10 can be an elastic telescopic rod, and the telescopic rod is in the extended state under normal conditions. The lower floating block 11 blocks the cooling water inlet 6, and it is provided with a buffer groove communicating with the cooling water inlet 6, and the annular groove is provided with a through communication hole 12. When the water pressure of the cooling water entering the cooling water inlet 6 is low, the water enters the annular groove and then is input into the cooling cavity 5 through the connection hole. When the incoming water pressure is relatively large, it will drive the lower floating block 11 to move upward. During the upward movement of the lower floating block 11, the extrusion of the guiding part 14 will squeeze the contact part 15, causing the cooling contact block 8 to drive the bump 9 to disengage from the cooling groove, increasing the contact surface area between the spindle housing 1 and the cooling cavity 5, thereby improving the cooling and heat dissipation effect, and ensuring the stability of the temperature of the spindle housing 1. The buffer reset member 13 can be a bolt and a reset spring. The lower floating block 11 can slide up and down through the bolt and is connected to the housing flange. The reset spring ensures that the lower floating block 11 can quickly reset when the water pressure is low.

[0022] Embodiment 4: This embodiment provides a drill spindle control system, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0023] The external cooling circulation assembly includes: A water supply tank 100 for storing cooling water; A cooling pumping assembly for pumping the cooling water into the cooling cavity 5; A cooling and temperature reduction assembly for cooling and reducing the temperature of the coolant delivered to the cooling cavity 5; A water tank temperature sensor 101 for detecting the temperature of the cooling water in the water supply tank 100; A plurality of inlet water temperature sensors 102 for detecting the temperature of the cooling water to be input into the cooling cavity 5; A plurality of inlet water pressure sensors 103 for detecting the water pressure of the cooling water to be input into the cooling cavity 5; A flow control valve 129 for controlling the flow rate of the cooling water input into the cooling cavity 5; A cooling delivery circuit connecting the water supply tank, the cooling pumping assembly, the cooling and temperature reduction assembly and the cooling cavity 5 to form a closed cooling circuit.

[0024] In this technical solution, the water supply tank 100 has a capacity of 2-5 cubic meters. If cooling water is provided to multiple spindles simultaneously, the capacity can be 10-15 cubic meters. The cooling pump assembly can adjust the efficiency and effectiveness of the cooling water pumping by changing the delivery power. The cooling and cooling assembly can adjust the temperature of the cooling water by changing the path of the cooling water flowing out of the cooling and cooling assembly. This allows the cooling water temperature to be adjusted to effectively cool the spindle when the spindle temperature fluctuates significantly, keeping the spindle within a certain temperature range. The water tank temperature sensor 101 detects the real-time water temperature in the water supply tank 100 and feeds this real-time water temperature back to the controller, allowing the controller to better control the operating status of the cooling pump assembly and the cooling and cooling assembly, ensuring that the output cooling water temperature is sufficient to maintain the spindle temperature within a certain range, thereby better ensuring the overall performance and service life of the spindle. The water inlet temperature sensor 102 is used to monitor the temperature of the cooling water passing through the cooling and cooling assembly, allowing the controller to determine whether the cooling water temperature passing through the cooling and cooling assembly meets the requirements and, if not, to make timely adjustments. The inlet water pressure sensor 103 is used to monitor the water pressure of the cooling water to be introduced into the cooling chamber 5, and to adjust the pressure better when the pressure does not meet the requirements. The flow control valve 129 is used to control the flow of cooling water entering the cooling chamber 5. When the cooling water temperature is higher or lower than the required temperature, the flow of cooling water entering the cooling chamber 5 can be adjusted in time through the flow control valve 129. The cooling delivery circuit connects the various components in the external cooling circulation assembly to form a connected pipeline. If the control system provides cooling water for the cooling chambers 5 of multiple spindles, an inlet water temperature sensor 102 and an inlet water pressure sensor 103 are provided at the inlet end of each cooling chamber 5.

[0025] Embodiment 5: This embodiment provides a drilling machine spindle control system, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0026] The cooling pumping assembly includes: The main delivery pump 104 is used to deliver cooling water; Auxiliary delivery pump 105, used to cooperate with the main delivery pump 104 to deliver cooling water; Cooling components: The main cooler 106 is used to cool the cooling water; The secondary cooler 107 is used to cooperate with the primary cooler 106 to achieve a cooling effect; Auxiliary cooler 108, used to cooperate with the main cooler 106 and the secondary cooler 107 to achieve cooling effect; Among them, the cooling and conveying loop can control the cooling water to pass through the main conveying pump 104 and / or the auxiliary conveying pump 105 in the cooling pumping assembly, and control the cooling water to pass through the main cooler 106 and / or the secondary cooler 107 and / or the auxiliary cooler 108 in the cooling and temperature-reducing assembly.

[0027] In this technical solution, the main conveying pump 104 plays a major role in pumping the cooling water when providing cooling water for one to three main shafts, and changing the output power of the main conveying pump 104 can adjust the water pressure and flow rate of the passing cooling water. The auxiliary conveying pump 105 can cooperate with the main conveying pump 104 to jointly pump the cooling water. When providing cooling water for three or more main shafts, the main conveying pump 104 and the auxiliary conveying pump 105 can be connected in parallel to increase the overall pump flow rate of the cooling pumping assembly; when the main conveying pump 104 has passed the cooling water under the maximum output power and the water pressure is insufficient for multiple main shafts, the main conveying pump 104 and the auxiliary conveying pump 105 can be connected in series to ensure the pressure of the cooling water output by the cooling pump assembly.

[0028] Among them, the main cooler 106, the secondary cooler 107 and the auxiliary cooler 108 can all be feasible coolers such as plate type, shell and tube type, spiral plate type or evaporative type.

[0029] The main cooler 106 is used to provide cooling water for further temperature reduction for one to three main shafts, and the secondary cooler 107 can be connected in series with the main cooler 106 to further reduce the temperature of the cooling water. If the secondary cooler 107 is connected in parallel with the main cooler 106, it can play a role in cooling and temperature reduction during large-flow cooling water transportation. The auxiliary cooler 108 can be connected in series with the main cooler 106 and the secondary cooler 107 in sequence to further reduce the temperature of the cooling water output outward, such as when multiple main shafts are running simultaneously and the temperature is high; at the same time, the auxiliary cooler 108 can be connected in parallel with the main cooler 106 and the secondary cooler 107 to ensure the temperature of the cooling water while ensuring the flow rate when providing cooling water for many main shafts.

[0030] By adjusting the output status of the cooling pumping assembly and the cooling and temperature-reducing assembly, it can meet the cooling of a single or multiple main shafts, ensure the temperature of the cooling water conveyed to the main shafts when the water temperature in the water supply tank 100 is high, can also cool simultaneously when the temperature of a single or multiple main shafts is too high, and can ensure the water pressure and flow rate when cooling a single or multiple main shafts to ensure the service performance and service life of the main shafts.

[0031] Embodiment 6: This embodiment provides a control system for a drill press main shaft. In addition to including the technical solution of the above embodiment, it also has the following technical features.

[0032] The cooling and conveying loop includes: The cooling return water pipeline 109 connects the outlet end of the cooling cavity 5 and the inlet end of the water supply tank 100; The pump delivery pipeline includes a main pump delivery pipeline 110 and an auxiliary pump delivery pipeline 111 connected in parallel. One end after parallel connection is connected to the outlet end of the water supply tank 100. The main delivery pump 104 is arranged on the main pump delivery pipeline 110, and the auxiliary delivery pump 105 is arranged on the auxiliary pump delivery pipeline 111; The cooling delivery pipeline includes a main cooling pipeline 112, a secondary cooling pipeline 113 and a sub-cooling pipeline 114 connected in parallel. One end after parallel connection is connected to the other end of the delivery pipeline, and the other end is connected to the inlet end of the cooling cavity 5; The main cooler 106 is arranged on the main cooling pipeline 112, the secondary cooler 107 is arranged on the secondary cooling pipeline 113, and the sub-cooler 108 is arranged on the sub-cooling pipeline 114; An auxiliary pump control valve 115 is arranged on the side of the auxiliary pump delivery pipeline 111 near the inlet end of the auxiliary delivery pump 105; A main cooling control valve 116 is arranged on the side of the main cooling pipeline 112 near the inlet end of the main cooler 106, a secondary cooling control valve 117 is arranged on the side of the secondary cooling pipeline 113 near the inlet end of the secondary cooler 107, and a sub-cooling control valve 118 is arranged on the side of the sub-cooling pipeline 114 near the inlet end of the sub-cooler 108; And the middle of the cooling return water pipeline 109 passes through a cooling tower.

[0033] In this technical solution, the cooling return water pipeline 109 is used to transport the cooling water with increased temperature discharged from the cooling cavity 5 back to the water supply tank 100, and the middle of the cooling return water pipeline 109 passes through a cooling tower, so as to pre-cool the cooling water entering the water supply tank 100, and then ensure the water temperature in the water supply tank 100.

[0034] The pump delivery pipeline is used to transport the water in the water supply tank 100 to the inlets of the main delivery pump 104 and / or the auxiliary delivery pump 105; And it can ensure that the pumped cooling water enters the cooling and temperature reduction component better.

[0035] The cooling delivery pipeline regularly passes the cooling water output from the cooling pump assembly through the main cooler 106 and / or the secondary cooler 107 and / or the sub-cooler 108 to ensure the temperature of the cooling water passing through the cooling and temperature reduction component. When the auxiliary pump control valve is opened, the cooling water enters the auxiliary delivery pump 105; When the main cooling valve is opened, the cooling water can enter the main cooler 106. When the secondary cooling valve is opened, the cooling water can enter the secondary cooler 107. When the sub-cooling pump is opened, the cooling water can enter the sub-cooling pump. By controlling the opening and closing of each valve by the controller, the flow path form of the cooling water in the cooling delivery loop can be changed.

[0036] Embodiment 7: This embodiment provides a drill spindle control system, which has the following technical features in addition to including the technical solution of the above embodiment.

[0037] The pump delivery pipeline further includes: A pumping switching pipeline 119, one end of which is connected to one side of the inlet end of the main delivery pump 104 where it is connected to the main pumping pipeline 110, and a main pump switching valve 120 is provided at this end; the other end is connected to one side of the outlet end of the auxiliary delivery pump 105 where it is connected to the auxiliary pumping pipeline 111, and a secondary pump switching valve 121 is provided at this end. The cooling delivery pipeline further includes: A main cooling switching pipeline 122, one end of which is connected to the main cooling pipeline 112 between the main cooling control valve 116 and the main cooler 106, and a main cooling switching valve 123 is provided at this end; the other end is connected to the secondary cooling pipeline 113 at the outlet end of the secondary cooler 107, and a main cooling pipeline switching valve 124 is provided at this end. A secondary cooling switching pipeline 125, one end of which is connected to the secondary cooling pipeline 113 between the secondary cooling control valve 117 and the secondary cooler 107, and a secondary cooling switching valve 126 is provided at this end; the other end is connected to the auxiliary cooling pipeline 114 at the outlet end of the auxiliary cooler 108, and a secondary cooling pipeline switching valve 127 is provided at this end. And a main cooling control valve 128 is provided on one side of the main cooling pipeline 112 where it is connected to the outlet end of the main cooler 106. The main pump switching valve 120, the secondary pump switching valve 121, the main cooling switching valve 123, the main cooling pipeline switching valve 124, the secondary cooling switching valve 126, and the secondary cooling pipeline switching valve 127 are all three-way electrically controlled valves. The main cooling control valve 116, the main cooling control valve 128, the main cooling control valve 116, and the auxiliary pump control valve 115 are two-way electrically controlled valves.

[0038] In this technical solution, the main pump switching valve 120, the secondary pump switching valve 121, and the auxiliary pump control valve 115 in the pumping switching pipeline 119 cooperate to enable the main delivery pump 104 to pump cooling water alone, or to be connected in parallel or in series with the auxiliary delivery pump 105 for the delivery of cooling water. The main pump switching valve 120 can connect the inlet end of the main delivery pump 104 to the main pumping pipeline 110 or the pumping switching pipeline 119; while the secondary pump switching valve 121 can connect the outlet end of the auxiliary delivery pump 105 to the auxiliary pumping pipeline 111 or the pumping switching pipeline 119.

[0039] When the main delivery pump 104 pumps cooling water alone, the auxiliary pump control valve 115 is closed, the main pump switching valve 120 connects the inlet end of the main delivery pump 104 to the main pumping pipeline 110, and the secondary pump switching valve 121 connects the outlet end of the auxiliary delivery pump 105 to the pumping switching pipeline 119.

[0040] When the main transfer pump 104 and the auxiliary transfer pump 105 pump the cooling water in series, the auxiliary pump control valve 115 is opened. The main pump switching valve 120 connects the inlet end of the main transfer pump 104 to the pumping switching pipeline 119, and the secondary pump switching valve 121 connects the outlet end of the auxiliary transfer pump 105 to the pumping switching pipeline 119. At this time, the cooling water enters from the auxiliary pumping pipeline 111 and is discharged from the main pumping pipeline 110.

[0041] When the main transfer pump 104 and the auxiliary transfer pump 105 pump the cooling water in parallel, the auxiliary pump control valve 115 is opened. The main pump switching valve 120 connects the inlet end of the main transfer pump 104 to the main pumping pipeline 110, and the secondary pump switching valve 121 connects the outlet end of the auxiliary transfer pump 105 to the auxiliary pumping pipeline 111.

[0042] The main cooling control valve 116, the secondary cooling control valve 117, the auxiliary cooling control valve 118, the main cooling switching valve 123, the main cooling path switching valve 124, the secondary cooling switching valve 126 and the secondary cooling path switching valve 127 in the cooling transfer pipeline can cooperate to enable the main cooler 106 to complete the cooling work alone, or the main cooler 106 and the secondary cooler 107 to complete the cooling work in parallel, or the main cooler 106 and the secondary cooler 107 to complete the cooling work in series, or the main cooler 106, the secondary cooler 107 and the auxiliary cooler 108 to complete the cooling work in series, or the main cooler 106, the secondary cooler 107 and the auxiliary cooler 108 to complete the cooling work in parallel. Among them, the main cooling switching valve can connect the inlet end of the main cooler 106 to the main cooling pipeline 112 or the main cooling switching pipeline 122; the main cooling path switching valve 124 connects the outlet end of the secondary cooler 107 to the main cooling switching pipeline or the secondary cooling pipeline 113; the secondary cooling switching valve 126 connects the outlet end of the secondary cooler 107 to the secondary cooling switching pipeline 125 or the secondary cooling pipeline 113; the secondary cooling path switching valve 127 connects the outlet end of the auxiliary cooler 108 to the auxiliary cooling pipeline 114 or the secondary cooling switching pipeline 125.

[0043] When the main cooler 106 completes the cooling work alone, the main cooling control valve 116 and the main cooling control valve 128 are opened, and the main cooling switching valve 123 connects the inlet end of the main cooler 106 to the main cooling pipeline 112.

[0044] When the main cooler 106 and the secondary cooler 107 complete the cooling work in series, the secondary cooling control valve 117 and the main cooling control valve 128 are opened, the main cooling control valve 116 is closed, the secondary cooling switching valve 126 connects the inlet end of the secondary cooler 107 to the secondary cooling pipeline 113, the main cooling path switching valve 124 connects the outlet end of the secondary cooler 107 to the main cooling switching pipeline 122, and the main cooling switching valve 123 connects the inlet end of the main cooler 106 to the main cooling switching pipeline 122.

[0045] When the main cooler 106 and the secondary cooler 107 work in parallel to complete the cooling work, the main cooling control valve 116, the secondary cooling control valve 117, and the main cooling control valve 128 are opened; the main cooling switching valve 123 connects the inlet end of the main cooler 106 to the main cooling pipeline 112, the main cooling pipeline switching valve connects the outlet end of the secondary cooler 107 to the secondary cooling pipeline 113, and the secondary cooling switching valve 126 connects the inlet end of the secondary cooler 107 to the secondary cooling pipeline 113.

[0046] When the main cooler 106, the secondary cooler 107, and the auxiliary cooler 108 work in series to complete the cooling work, the main cooling control valve 116, the main cooling control valve 128, and the main cooling control valve 116 are closed, and the auxiliary cooling control valve 118 is opened; the main cooling switching valve 123 connects the inlet end of the main cooler 106 to the main cooling switching pipeline 122, the main cooling pipeline switching valve 124 connects the outlet end of the secondary cooler 107 to the main cooling switching pipeline 122, the secondary cooling switching valve 126 connects the inlet end of the secondary cooler 107 to the secondary cooling switching pipeline, and the secondary cooling pipeline switching valve 127 connects the outlet end of the auxiliary cooler 108 to the secondary cooling switching pipeline connection.

[0047] When the main cooler 106, the secondary cooler 107, and the auxiliary cooler 108 work in parallel to complete the cooling work, the main cooling control valve 116, the main cooling control valve 128, the main cooling control valve 116, and the auxiliary cooling control valve 118 are opened. The main cooling switching valve 123 connects the inlet end of the main cooler 106 to the main cooling pipeline 112, the main cooling pipeline switching valve 124 connects the outlet end of the secondary cooler 107 to the secondary cooling pipeline 113, the secondary cooling switching valve 126 connects the inlet end of the secondary cooler 107 to the connection of the secondary cooling pipeline 113, and the secondary cooling pipeline switching valve 127 connects the outlet end of the auxiliary cooler 108 to the auxiliary cooling pipeline 114.

[0048] The controller adjusts the operating modes of the cooling pump assembly and the cooling and temperature reduction assembly by controlling the states of the main cooling control valve 116, the main cooling control valve 128, the main cooling control valve 116, the auxiliary pump control valve 115, the main pump switching valve 120, the secondary pump switching valve 121, the main cooling switching valve 123, the main cooling pipeline switching valve 124, the secondary cooling switching valve 126, and the secondary cooling pipeline switching valve 127, thereby realizing the conveying work of cooling water with various cooling temperatures and various pressures.

[0049] Embodiment 8: This embodiment provides a control method for a drill press spindle control system. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0050] The control method includes: S1. Obtain the operating data when the current spindle is performing drilling work; S2. Pre-calculate the temperature pre-value T of the spindle housing 1 according to the operating data of the current spindle S预 and its change trend, and according to TS预 and the change trend to determine the effect of the external cooling circulation component on cooling the spindle housing 1; S3. Obtain the current operating conditions of the external cooling circulation component and the temperature T of the cooling water in the water supply tank 100 C , and the temperature of the cooling water entering the internal cooling cavity 5 of other spindles. According to the effect of cooling the spindle housing 1 determined in S2 (i.e., the temperature data required to cool the spindle), correct and adjust the later operating conditions of the cooling circulation component, and synchronously correct the flow rate of the water entering the cooling cavity 5 of other spindles; then, during the drilling operation of the spindle, obtain the temperature T of the spindle housing in real time S时 ; Compare T S阈 with T S时 to determine T S△ ; Judge whether the temperature of the spindle exceeds the shaft temperature difference threshold according to T S△ ; If not, maintain the operating modes of the medium cooling pumping component and the cooling and temperature reduction component of the current external cooling circulation component; If so, judge whether T C can be kept within the temperature difference threshold by adjusting the cooling pumping component and the cooling and temperature reduction component according to T and the current operating modes of the cooling pumping component and the cooling and temperature reduction component; S△ ; If it can, adjust the temperature, water pressure and flow rate of the cooling water entering the cooling cavity 5 according to T S△ ; at the same time, adjust the flow rate of the cooling water entering other spindles; If it cannot, stop the operation of the spindle and give an alarm.

[0051] In this technical solution, before the drill spindle runs, the control system first obtains the operating data of the spindle, that is, the rotation speed and other conditions in each stage during drilling; then, according to the operating conditions of the spindle during drilling, determine the temperature pre-value and the change trend of the temperature reached by the spindle housing 1, and determine the temperature value that the external cooling circulation component needs to cool the spindle according to the temperature change trend.

[0052] When drilling is performed on the main shaft later, obtain the current operating conditions of the external cooling circulation assembly, the current water temperature in the water supply tank 100, and the temperature of the cooling water entering other main shaft cooling chambers 5, and adjust and correct the current operating conditions of the external cooling circulation assembly with the temperature value determined to require cooling in S2 or adjust the flow rate of the cooling water entering the main shaft cooling chamber 5. For example, if the temperature value for cooling cannot be reached under the conditions of the output temperature and water pressure of the cooling water, the water pressure and flow rate of the cooling water can be increased, or the water temperature of the cooling water can be adjusted; when increasing the water pressure of the cooling water or decreasing the water temperature of the cooling water, the flow rate of the cooling water entering other main shaft cooling chambers 5 is corrected synchronously, so as to ensure the reasonable utilization of the cooling water.

[0053] Embodiment 9: This embodiment provides a control method for a drill press main shaft control system. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0054] The operation data of the main shaft obtained in S1 includes the material of the workpiece to be drilled and the drilling depth. The controller determines the proportion of the initial positioning stage, pre-drilling stage, stable drilling stage, and tool withdrawal stage in the total drilling time according to the material of the drilling object and the drilling depth, and determines the drill bit speed in each stage; In S2, the temperature threshold T in each stage is determined according to the material of the workpiece to be drilled and the drill bit speed in each stage S预 , and this temperature threshold is the maximum preset value of the temperature in the corresponding stage. The change trend is determined through the change of the temperature threshold T in each stage S预 , and a preset change in the operating conditions of the external cooling circulation assembly is formed according to the change trend; Among them, controlling the operating conditions of the external cooling circulation assembly includes: controlling the operating mode of the cooling pump assembly and controlling the operating mode of the cooling and temperature reduction assembly; and the temperature T of the main shaft housing obtained in real time in step three S时 is obtained at the start, middle, and end of each stage of drilling for this temperature T S时 , and if the duration of this stage is relatively long, T can be obtained several more times in the middle stage S时 .

[0055] In this technical solution, by obtaining the material of the workpiece to be drilled and the drilling depth, the time of the initial positioning stage, pre-drilling stage, stable drilling stage, and tool withdrawal stage in the drilling process is determined, and the drilling speed in each stage is determined. According to this data, the temperature rise of the main shaft housing 1 in each stage and the maximum preset value of the temperature in each stage are determined. For this maximum preset value, the external cooling circulation assembly can be controlled more precisely; thus, it is ensured that the operating temperature of the main shaft can be maintained within a certain range to ensure the operating performance and service life of the main shaft.

[0056] Embodiment 10: This embodiment provides a control method for the drill press spindle control system. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0057] The operation mode control of the cooling pump assembly includes: M1, the main delivery pump 104 outputs alone; M2, the main delivery pump 104 and the auxiliary delivery pump 105 output in series; M3, the main delivery pump 104 and the auxiliary delivery pump 105 output in parallel; The operation mode control of the cooling and temperature reduction assembly includes: R1, the main cooler 106 cools alone; R2, the main cooler 106 and the secondary cooler 107 cool in parallel; R3, the main cooler 106 and the secondary cooler 107 cool in series; R4, the main cooler 106, the secondary cooler 107 and the auxiliary cooler 108 cool in parallel; R5, the main cooler 106, the secondary cooler 107 and the auxiliary cooler 108 cool in series.

[0058] In this technical solution, the operation of the cooling circulation assembly is a combination of the operation mode of the cooling pump assembly and the operation mode of the cooling and temperature reduction assembly.

[0059] When the operation mode of the cooling pump assembly is M1: If the water pressure of the cooling water required in the spindle is insufficient, the output power of the main delivery pump 104 can be increased, or the mode can be switched to M2, and the output powers of the main delivery pump 104 and the auxiliary delivery pump 105 can be adjusted according to the demand, and at the same time, the flow rate of the cooling water entering other spindles can be adjusted; If the flow rate of the cooling water required in the spindle is insufficient, the output power of the main delivery pump 104 can also be increased, or the mode can be switched to M3, and the output powers of the pump and the auxiliary delivery pump 105 can be adjusted, and at the same time, the flow rate of the cooling water entering other spindles can be adjusted.

[0060] When the operation mode of the cooling and temperature reduction assembly is R1: There is a shortage of the temperature of the cooling water required in the spindle; If the flow rate of the cooling water is greater than the threshold value, the output power of the delivery pump can be reduced or the mode can be switched to R3, and at the same time, the flow rate of the cooling water entering other spindles; If the flow rate of the cooling water is within the threshold value, the mode can be switched to R2, and at the same time, the flow rate of the cooling water entering other spindles can be adjusted; If the temperature is still insufficient, the mode can be switched to R4, and at the same time, the flow rate of the cooling water entering other spindles can be adjusted.

[0061] When the operating mode of the cooling and temperature reduction component is at R2: There is a shortage of the required cooling water temperature in the main shaft. If the flow rate of the cooling water is greater than the threshold value, the output power of the delivery pump can be reduced, or the mode can be switched to R2, and at the same time, the flow rate of the cooling water entering other main shafts can be adjusted. If the temperature is still insufficient, the mode can be switched to R5, and at the same time, the flow rate of the cooling water entering other main shafts can be adjusted. If the flow rate of the cooling water is within the threshold value, the mode can be switched to R4, and at the same time, the flow rate of the cooling water entering other main shafts can be adjusted.

[0062] When the operating mode of the cooling and temperature reduction component is at R3: There is a shortage of the required cooling water temperature in the main shaft. If the flow rate of the cooling water is greater than the threshold value, the output power of the delivery pump can be reduced, or the mode can be switched to R5, and at the same time, the flow rate of the cooling water entering other main shafts can be adjusted. If the flow rate of the cooling water is within the threshold value, the mode can be switched to R5, and at the same time, the flow rate of the cooling water entering other main shafts can be adjusted.

[0063] Through the switching cooperation of the cooling water delivery component and the cooling and temperature reduction component, the transportation work of cooling water with various water pressures, water temperatures and flow rates can be satisfied. And when the water pressure, water temperature or flow rate in any main shaft is not within the threshold value, the operating modes of the cooling water delivery component and the cooling and temperature reduction component are adjusted, and the flow rate of the cooling water entering other main shafts is adjusted, so that the temperatures of all main shafts can be stably maintained within a certain range.

[0064] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A control system for a drill press spindle, characterized in that, Comprising: The drill spindle; An external cooling circulation assembly for providing coolant when the drill spindle is operating; A spindle temperature detection assembly arranged on the spindle housing (1) for detecting the heat generation condition of the spindle housing (1); The drill spindle includes: A spindle housing (1) including a cylinder body and housing flanges formed at both ends of the cylinder body; A stator component arranged inside the spindle housing (1); A rotor component arranged inside the stator component; A spindle body (2) arranged inside the rotor component and extending out of the spindle housing (1) at both ends; An external cooling ring arranged outside the spindle housing (1); Wherein a chip coolant channel (3) coaxially arranged is formed in the middle of the spindle body (2).

2. The drill press spindle control system according to claim 1, characterized in that, The external cooling circulation assembly includes: A water supply tank (100) for storing cooling water; A cooling pump assembly for pumping the cooling water into the external cooling ring; A cooling and temperature reduction assembly for cooling and reducing the temperature of the coolant conveyed to the external cooling ring; A water tank temperature sensor (101) for detecting the temperature of the cooling water in the water supply tank (100); An inlet water temperature sensor (102) for detecting the temperature of the cooling water to be input into the external cooling ring; An inlet water pressure sensor (103) for detecting the water pressure of the cooling water to be input into the external cooling ring; A flow control valve (129) for controlling the flow rate of the cooling water input into the external cooling ring; A cooling conveying circuit connecting the water supply tank, the cooling pump assembly, the cooling and temperature reduction assembly and the external cooling ring to form a closed-loop cooling circuit.

3. The drill spindle control system according to claim 2, characterized in that The cooling pump assembly includes: A main conveying pump (104) for performing the work of conveying cooling water; An auxiliary conveying pump (105) for cooperating with the main conveying pump (104) to convey cooling water; The cooling and temperature reduction assembly: A main cooler (106) for cooling and reducing the temperature of the cooling water; A secondary cooler (107) for cooperating with the main cooler (106) to cool and reduce the temperature; A sub-cooler (108) for cooperating with the main cooler (106) and the secondary cooler (107) to cool and reduce the temperature; Wherein the cooling conveying circuit can control the cooling water to pass through the main conveying pump (104) and / or the auxiliary conveying pump (105) in the cooling pump assembly, and control the cooling water to pass through the main cooler (106) and / or the secondary cooler (107) and / or the sub-cooler (108) in the cooling and temperature reduction assembly.

4. The drill press spindle control system according to claim 3, wherein The cooling conveying circuit includes: A cooling return pipe (109) connecting the outlet end of the external cooling ring and the inlet end of the water supply tank (100); A pump conveying pipeline including a main pumping pipeline (110) and an auxiliary pumping pipeline (111) connected in parallel. One end after parallel connection is connected to the outlet end of the water supply tank (100). The main conveying pump (104) is arranged on the main pumping pipeline (110), and the auxiliary conveying pump (105) is arranged on the auxiliary pumping pipeline (111); The cooling and conveying pipeline includes a main cooling pipeline (112), a secondary cooling pipeline (113) and a sub-cooling pipeline (114) connected in parallel. One end after parallel connection is connected to the other end of the pumping pipeline, and the other end is connected to the inlet end of the external cooling ring. The main cooler (106) is arranged on the main cooling pipeline (112), the secondary cooler (107) is arranged on the secondary cooling pipeline (113), and the sub-cooler (108) is arranged on the sub-cooling pipeline (114).

5. The drilling spindle control system according to claim 4, wherein The pump delivery pipeline further includes: A pumping switching pipeline (119), one end of which is connected to one side of the inlet end of the main delivery pump (104) by connecting to the main pumping pipeline (110), and a main pump switching valve (120) is provided at this end. The other end is connected to one side of the outlet end of the auxiliary delivery pump (105) by connecting to the auxiliary pumping pipeline (111), and a secondary pump switching valve (121) is provided at this end. The cooling and conveying pipeline further includes: A main cooling switching pipeline (122), one end of which is connected to the part of the main cooling pipeline (112) between the main cooling control valve (116) and the main cooler (106), and a main cooling switching valve (123) is provided at this end; the other end is connected to the part of the secondary cooling pipeline (113) at the outlet end of the secondary cooler (107), and a main cooling path switching valve (124) is provided at this end. A secondary cooling switching pipeline (125), one end of which is connected to the part of the secondary cooling pipeline (113) between the secondary cooling control valve (117) and the secondary cooler (107), and a secondary cooling switching valve (126) is provided at this end; the other end is connected to the part of the sub-cooling pipeline (114) at the outlet end of the sub-cooler (108), and a secondary cooling path switching valve (127) is provided at this end.

6. A control method applicable to the drill spindle control system according to any one of claims 3-5, characterized in that, Including: S1. Obtain the operation data of the current spindle during drilling work; S2, pre-calculate the temperature pre-value T of the spindle housing (1) according to the operating data of the current main shaft S预 and its change trend, and determine the cooling effect required by the external cooling cycle component for the spindle housing (1) according to the change trend of T S预 ; S3. Obtain the current operating condition of the external cooling circulation component and the temperature T of the cooling water in the water supply tank (100), C and the temperature of the cooling water entering the internal and external cooling rings of other spindles. According to the cooling effect of the spindle housing (1) that needs to be determined in advance in S2, correct and adjust the later operating condition of the cooling circulation component, and synchronously correct the flow rate of the water entering the external cooling rings of other spindles; then obtain the spindle temperature T in real time when the spindle is performing drilling work. S时 ; Compare T S阈 with T S时 to determine T S△ ; According to T S△ Determine whether the temperature of the main shaft exceeds the shaft temperature difference threshold; If not, maintain the operation modes of the medium cooling pumping component and the cooling and temperature reduction component of the current external cooling circulation component; If so, then according to TT C and the current operating modes of the cooling pumping assembly and the cooling and temperature reduction assembly, determine whether the difference can be maintained within the corresponding threshold by adjusting the cooling pumping assembly and the cooling and temperature reduction assembly; If possible, according to T S△ Adjust the temperature, water pressure and flow rate of the cooling water entering the outer cooling ring; at the same time, adjust the flow rate of the cooling water entering other spindles; If not, stop the operation of the spindle and give an alarm.

7. The control method according to claim 6, characterized in that The operation data of the spindle obtained in S1 includes the material of the workpiece to be drilled, the depth of the drill hole. The controller determines the proportion of the initial positioning stage, the pre-drilling stage, the stable drilling stage and the tool retraction stage in the total drilling time according to the material of the drilling object and the depth of the drill hole, and determines the drill bit speed in each stage; In S2, determine the temperature threshold T in each stage according to the material of the workpiece to be drilled and the rotational speed of the drill bit in each stage. S预 This temperature threshold is the maximum preset value of the temperature in the corresponding stage. Determine the change trend through the temperature threshold T in each stage. S预 Based on the change trend, form a preset for the change in the operating condition of the external cooling circulation component. Among them, controlling the operation of the external cooling circulation component includes: controlling the operation mode of the cooling pumping component and controlling the operation mode of the cooling and temperature reduction component.

Images