Automatic tool changing device and method for hydrostatic spindle

Abstract

The invention relates to the technical field of ultra-precision machining, in particular to an automatic tool changing device and method for a hydrostatic spindle. The tool changing device comprises a tool changing frame, a plurality of locking assemblies and a plurality of screw adjusting assemblies, the tool changing frame is provided with a plurality of tool changing stations, the locking assemblies and the tool changing stations are arranged on the tool changing frame in a one-to-one correspondence mode, the screw adjusting assemblies are arranged on the tool changing frame, and the positions of the screw adjusting assemblies and the positions of the locking assemblies are in one-to-one correspondence. The screw adjusting assembly is used for adjusting an adjusting screw of the liquid expansion clamp. The locking assembly is arranged on the tool changing frame to lock the tool, the adjusting screw of the liquid expansion clamp is adjusted through the screw adjusting assembly so that the liquid expansion clamp can be in a clamping state or a loosening state, and the locking assembly, the screw adjusting assembly and the liquid expansion clamp are matched to achieve automatic tool changing. The whole process does not need human participation, the working efficiency is improved, the risk in the process of manually replacing the cutter is avoided, and the safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-precision machining, and particularly relates to a hydrostatic spindle automatic tool changing device and method. Background Art

[0002] In the mechanical processing industry, the efficient and precise operation of machine tools plays a decisive role in production efficiency and product quality. Hydrostatic spindles are widely used in the field of ultra-precision machining due to their high precision, high rigidity, and good damping characteristics. However, due to the high precision of hydrostatic spindles and the absence of a tool change drawbar, there are many drawbacks in the existing tool change methods.

[0003] Currently, the tool change methods of most hydrostatic spindles basically rely on manual operation. Manual tool change requires first stopping the machine tool, and then manually disassembling the old tool and replacing it with a new tool. This method of manually replacing tools not only has low efficiency, discontinuous production, and cannot be used in an automated production line, but also has a relatively high safety risk due to frequent manual tool change operations. Summary of the Invention

[0004] The present invention provides a hydrostatic spindle automatic tool changing device to solve the problems of low efficiency and high safety risk existing in the existing tool change methods of hydrostatic spindles.

[0005] The present invention provides a hydrostatic spindle automatic tool changing device, including: A tool change rack, which is provided with a plurality of tool change stations; A plurality of locking components, which are arranged on the tool change rack in one-to-one correspondence with the plurality of tool change stations, and the locking components are used to lock the tools; A plurality of screw adjusting components, which are arranged on the tool change rack, and the positions of the plurality of screw adjusting components are in one-to-one correspondence with the positions of the plurality of locking components. The screw adjusting components are used to adjust the adjusting screws of the hydraulic expansion fixture so that the hydraulic expansion fixture is in a clamping state or a loosening state.

[0006] According to the hydrostatic spindle automatic tool changing device provided by the present invention, the plurality of screw adjusting components are arranged at equal intervals along the length direction of the tool change rack.

[0007] According to the hydrostatic spindle automatic tool changing device provided by the present invention, the screw adjusting component includes: A torque wrench; A torque motor mounting plate, which is arranged on the upper part of the tool change rack; A driving member, which is arranged on the upper part of the torque motor mounting plate, and the rotating shaft of the driving member is connected to the torque wrench. The driving member is used to drive the torque wrench to rotate so as to adjust the adjusting screws of the hydraulic expansion fixture.

[0008] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, the rotating shaft of the driving member is detachably connected to the torque wrench.

[0009] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, a plurality of the locking components are arranged at equal intervals along the length direction of the tool changing rack.

[0010] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, the locking component includes: Two clamping mechanisms, a clamping groove is arranged at the tool changing station, guide grooves are arranged on two opposite side walls of the clamping groove, the clamping mechanisms are movably arranged in the guide grooves, the clamping mechanisms are adapted to switch between a retracted state and an extended state, when the tool passes through the bayonet of the clamping groove, the clamping mechanisms are in the retracted state so that the tool is clamped into the clamping groove; when the tool enters or leaves the clamping groove, the clamping mechanisms are in the extended state to lock the tool in the clamping groove.

[0011] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, the clamping mechanism includes: A bracket, the bracket is slidably arranged in the guide groove; An elastic member, the elastic member is arranged in the guide groove, one end of the elastic member is connected to the bottom wall of the guide groove, and the other end of the elastic member is connected to the end of the bracket far from the clamping groove.

[0012] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, the clamping mechanism further includes: A locking wheel, the locking wheel is in rolling fit with the end of the bracket close to the clamping groove through a connecting pin.

[0013] According to a kind of automatic tool changing device for a hydrostatic spindle provided by the present invention, a proximity switch is arranged in the clamping groove, and the proximity switch is used to sense whether there is a tool in the clamping groove.

[0014] The present invention also provides a method for automatically changing tools for a hydrostatic spindle, the tool changing method is based on the automatic tool changing device for a hydrostatic spindle described in any one of the above, and includes: Determine the angle that the hydrostatic spindle needs to rotate during tool changing according to the actual position of the adjusting screw, and determine the height that the hydrostatic spindle should be at during the tool changing process according to the actual position of the tool changing rack to ensure that the height of the adjusting screw matches the height of the rotating wrench; determine the rotation angle required by the rotating wrench when the hydraulic expansion fixture switches between the clamping state and the loosening state. Drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the empty tool change station, ensuring that the static pressure spindle moves to the position corresponding to the empty tool change station, so that the locking component at the empty tool change station locks the tool; the tool triggers the proximity switch to output a signal to control the driving member to rotate reversely by a predetermined angle, so that the hydraulic expansion fixture is loosened, and the tool is stored at the tool change station; Control the static pressure spindle to first lift to the zero position of the Z-axis, drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the target tool, so that the tool shank of the target tool is inserted into the hydraulic expansion fixture; control the driving member to rotate forward by a predetermined angle, so that the hydraulic expansion fixture clamps the tool; drive the tool to move through the static pressure spindle, so that the locking component releases the locking of the tool; Control the static pressure spindle to move to a safe position and lift to the zero position of the Z-axis.

[0015] The automatic tool change device for the static pressure spindle provided by the present invention locks the tool by setting a locking component on the tool changer, adjusts the adjusting screw of the hydraulic expansion fixture through the screw adjusting component, so that the hydraulic expansion fixture is in a clamping state or a loosening state, and realizes automatic tool change through the cooperation of the locking component, the screw adjusting component, and the hydraulic expansion fixture. The whole process does not require manual participation, improves work efficiency, avoids risks in the process of manual tool change, and improves safety. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a front view structural schematic diagram of the automatic tool change device for the static pressure spindle provided by the present invention and the static pressure spindle.

[0018] Figure 2 It is a side view structural schematic diagram of the automatic tool change device for the static pressure spindle provided by the present invention and the static pressure spindle.

[0019] Figure 3 is Figure 1 The partial enlarged structural schematic diagram at A in.

[0020] Reference Signs: 10. Tool changer; 11. Card slot; 20. Locking component; 21. Bracket; 22. Elastic member; 23. Locking wheel; 24. Proximity switch; 30. Screw adjustment component; 31. Torque wrench; 32. Torque motor mounting plate; 33. Driving member; 40. Machine tool base; 50. Hydrostatic spindle; 51. Adjusting screw; 52. Hydraulic expansion fixture. Detailed implementation manner

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0025] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0026] As Figure 1 and Figure 2 shown, the automatic tool changing device for a hydrostatic spindle includes a tool changing rack 10, a plurality of locking components 20, and a plurality of screw adjusting components 30. The tool changing rack 10 is provided with a plurality of tool changing stations. The plurality of locking components 20 are arranged on the tool changing rack 10 corresponding to the plurality of tool changing stations one by one, and the locking components 20 are used to lock the tool. The plurality of screw adjusting components 30 are arranged on the tool changing rack 10, and the positions of the plurality of screw adjusting components 30 correspond to the positions of the plurality of locking components 20 one by one. The screw adjusting components 30 are used to adjust the adjusting screw 51 of the expansion chuck 52 so that the expansion chuck 52 is in a clamping state or a loosening state.

[0027] The automatic tool changing device for a hydrostatic spindle provided by the present invention locks the tool by arranging the locking components 20 on the tool changing rack 10, adjusts the adjusting screw 51 of the expansion chuck 52 through the screw adjusting components 30 so that the expansion chuck 52 is in a clamping state or a loosening state, and realizes automatic tool changing through the cooperation of the locking components 20, the screw adjusting components 30, and the expansion chuck 52. The whole process does not require human participation, improves work efficiency, avoids risks in the process of manual tool changing, and improves safety. During the tool changing process, by precisely controlling the height and rotation angle of the hydrostatic spindle 50, and the forward and reverse rotation of the driving member 33, the automatic loosening, storage, and clamping of the tool are realized. The whole process does not require human participation, greatly improving production efficiency and automation level. At the same time, the automation characteristics of the automatic tool changing device for a hydrostatic spindle also reduce the errors and safety risks that may be caused by manual operation, providing an efficient and safe tool changing solution for the ultra-precision machining field.

[0028] In one embodiment of the present invention, as Figure 1 and Figure 2As shown, the automatic tool changing device of the hydrostatic spindle further includes a machine tool base 40, and the machine tool base 40 provides a stable installation foundation for the tool changing rack 10. The stability of the machine tool base 40 is crucial for the accuracy and reliability of the entire tool changing process. It can effectively reduce the vibration and error that may occur during the tool changing process, and ensure the stability of the tool in the locked and unlocked states. As Figure 1 As shown, the tool changing rack 10 is arranged in the left-right direction. The tool changing rack 10 is arranged on the upper part of the machine tool base 40 and extends in the left-right direction. The length of the tool changing rack 10 is specifically determined according to the number of tool changing stations required. Preferably, multiple tool changing stations are arranged at equal intervals along the length direction of the tool changing rack 10. The equally spaced tool changing stations make the distribution of the tools on the tool changing rack 10 more uniform, which is beneficial to maintaining the balance of the tool changing rack 10 and also facilitates the accurate tool position recognition and operation by the automatic control system.

[0029] In an embodiment of the present invention, multiple screw adjustment components 30 are arranged at equal intervals along the length direction of the tool changing rack 10, and the screw adjustment components 30 are responsible for the installation and disassembly of the tools at the corresponding tool changing stations.

[0030] In an embodiment of the present invention, as Figure 1 and Figure 2 As shown, the screw adjustment component 30 includes a torque wrench 31, a torque motor mounting plate 32, and a driving member 33. The torque motor mounting plate 32 is arranged on the upper part of the tool changing rack 10, and the torque motor mounting plate 32 is used to provide a stable installation foundation for the driving member 33. The driving member 33 is arranged on the upper part of the torque motor mounting plate 32, and the rotating shaft of the driving member 33 is connected to the torque wrench 31. The driving member 33 is used to drive the torque wrench 31 to rotate to adjust the adjusting screw 51 of the hydraulic expansion clamp 52. The driving member 33 is a driving motor or a combination of a driving motor and a speed reducer. Preferably, the driving member 33 is provided with an angle sensor, and the angle sensor is used to detect the rotation angle of the rotating shaft of the driving member 33 to achieve precise control of the driving member 33. The setting of the angle sensor further improves the accuracy and automation degree of the tool changing process. By real-time monitoring the rotation angle of the rotating shaft, the control system can accurately control the rotation amount of the driving member 33 to ensure that the adjusting screw 51 of the hydraulic expansion clamp 52 accurately reaches the required clamping or loosening position.

[0031] When replacing the tool, connect the torque wrench 31 to the adjusting screw 51, and control the driving member 33 to rotate forward or backward. The driving member 33 drives the torque wrench 31 to drive the adjusting screw 51 to rotate forward or backward, thereby realizing the automatic switching of the hydraulic expansion fixture 52 between the clamping state and the loosening state. The screw adjustment assembly 30 can accurately adjust the tightness state of the hydraulic expansion fixture 52, ensuring the stability and reliability of the tool during the machining process. This not only improves the tool changing efficiency but also effectively avoids tool damage or machining errors caused by excessive or insufficient adjustment, further enhancing the performance and stability of the entire device.

[0032] In an embodiment of the present invention, the rotating shaft of the driving member 33 is detachably connected to the torque wrench 31. The detachable connection design between the driving member 33 and the torque wrench 31 facilitates the quick replacement of the torque wrench 31 matching the hydraulic expansion fixture 52 according to different specifications, improving the versatility and flexibility of the device. For example, when replacing a larger-sized tool, a torque wrench 31 with a higher torque may be required to adjust the clamping force of the hydraulic expansion fixture 52; while when replacing a smaller-sized tool, a torque wrench 31 with a lower torque may be needed to avoid tool damage caused by excessive clamping. Through this detachable connection method, the operator can complete the replacement of the torque wrench 31 within a few minutes without complex tools or adjustments, greatly improving the tool changing efficiency.

[0033] In an embodiment of the present invention, a plurality of locking components 20 are arranged at equal intervals along the length direction of the tool changing rack 10. This uniform arrangement method also facilitates the precise positioning and operation of the automatic control system, improving the accuracy and reliability of the tool changing process.

[0034] In an embodiment of the present invention, as Figure 3 shown, the locking component 20 includes two clamping mechanisms. A clamping groove 11 is provided at the tool changing station. Guide grooves are provided on both opposite side walls of the clamping groove 11. The clamping mechanism is movably arranged in the guide groove and is adapted to switch between the extended state and the retracted state. When the tool passes through the notch of the clamping groove 11, the clamping mechanism is in the retracted state to enable the tool to be inserted into the clamping groove 11; when the tool enters or leaves the clamping groove 11, the clamping mechanism is in the extended state to lock the tool in the clamping groove 11. By adopting this clamping method, not only the installation and replacement efficiency of the tool are improved, but also the stability of the tool during the machining process is enhanced, effectively avoiding the machining errors and equipment damage risks caused by tool loosening. Through the flexible switching of the clamping mechanism, the quick locking and release of the tool are realized, further enhancing the automation degree and reliability of the entire tool changing device.

[0035] In an embodiment of the present invention, as Figure 3As shown, the clamping mechanism includes a bracket 21 and an elastic member 22. The bracket 21 is a block structure. The bracket 21 can be slidably arranged in the guide groove. The elastic member 22 is arranged in the guide groove. One end of the elastic member 22 is connected to the bottom wall of the guide groove, and the other end of the elastic member 22 is connected to the end of the bracket 21 away from the slot 11. The elastic member 22 is a compression spring. This design enables the clamping mechanism to provide stable elastic support when the tool enters or leaves the slot 11, ensuring the smooth movement of the clamping mechanism. Of course, the specific type of the elastic member 22 is not limited to this, and a spring sheet or other elastic mechanism can also be used, which can be determined according to actual needs.

[0036] In one embodiment of the present invention, the clamping mechanism also includes a locking wheel 23, and the locking wheel 23 rolls with one end of the bracket 21 near the slot 11 through a connecting pin. When the tool passes through the bayonet of the slot 11, the locking wheel 23 rolls with the tool rod of the tool. By providing the locking wheel 23, not only is the resistance of the tool when entering and leaving the slot 11 reduced, but also the positioning accuracy and tool changing efficiency of the tool are improved. Compared with the traditional sliding contact, the rolling contact mode of the locking wheel 23 can guide the tool into the slot 11 more smoothly, reduce the heat and stress generated by friction, and further protect the tool. In addition, the clamping mechanism in the locking assembly 20 adopts the cooperation of the elastic member 22 and the locking wheel 23, which can not only adapt to tools of different sizes, but also can automatically adjust the clamping force when the tool is clamped or released by the liquid expansion clamp 52, further enhancing the fixing effect and replacement efficiency of the tool.

[0037] In one embodiment of the present invention, a proximity switch 24 is provided in the card slot 11, and the proximity switch 24 is used to sense whether there is a tool in the card slot 11. The proximity switch 24 in the card slot 11 can sense the presence of the tool in real time, ensuring that the tool is locked or released only when it is in the correct position, effectively avoiding the risk of the tool falling or being damaged, and improving the reliability and stability of the entire tool changing process.

[0038] Furthermore, a proximity switch 24 is also provided below the slot 11 , and is used to detect whether the tool is in place in the vertical direction, to prevent the tool from not being in place in the vertical direction, thereby affecting the next installation of the tool.

[0039] The present invention further provides an automatic tool changing method for a hydrostatic spindle 50, the tool changing method being based on the automatic tool changing device for a hydrostatic spindle described in any one of the above embodiments, comprising: Determine the angle that the static pressure spindle 50 needs to rotate during tool change according to the actual position of the adjusting screw 51, and determine the height that the static pressure spindle 50 should be at during the tool change process according to the actual position of the tool changer 10, so as to ensure that the height of the adjusting screw 51 matches the height of the rotating wrench; determine the rotation angle required for the rotating wrench when the hydraulic expansion fixture 52 switches between the clamping state and the loosening state.

[0040] It should be noted here that before performing the above steps, it is necessary to accurately calibrate the position coordinates of each tool change station in the machine tool numerical control system.

[0041] Drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the empty tool change station, ensure that the static pressure spindle 50 moves to the position corresponding to the empty tool change station, so that the locking component 20 of the empty tool change station locks the tool; the tool triggers the proximity switch 24 to output a signal to control the driving member 33 to rotate reversely by a predetermined angle, so that the hydraulic expansion fixture 52 is loosened, and the tool is stored in the tool change station.

[0042] It should be noted here that the steps for the locking component 20 of the empty tool change station to lock the tool include the following steps: when the tool enters the card slot 11, the tool shank and the locking wheel 23 move in cooperation, and the locking wheel 23 pushes the bracket 21 into the guide groove, so that the tool enters the card slot 11. After the tool enters the card slot 11, under the action of the elastic member 22, the locking wheel 23 extends from the card slot 11 to lock the tool in the card slot 11.

[0043] Control the static pressure spindle 50 to first lift to the zero position of the Z-axis, drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the target tool, so that the tool shank of the target tool is inserted into the hydraulic expansion fixture 52; control the driving member 33 to rotate forward by a predetermined angle, so that the hydraulic expansion fixture 52 clamps the tool; drive the tool to move through the static pressure spindle 50 to release the locking of the tool by the locking component 20.

[0044] Control the static pressure spindle 50 to move to a safe position and lift to the zero position of the Z-axis.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic tool changing device for a hydrostatic spindle, characterized in that Comprising: A tool changer (10), wherein a plurality of tool changing stations are provided on the tool changer (10); A plurality of locking components (20), the plurality of locking components (20) are arranged on the tool changer (10) in one-to-one correspondence with the plurality of tool changing stations, and the locking components (20) are used for locking tools; A plurality of screw adjusting components (30), the plurality of screw adjusting components (30) are arranged on the tool changer (10), the positions of the plurality of screw adjusting components (30) are in one-to-one correspondence with the positions of the plurality of locking components (20), and the screw adjusting components (30) are used for adjusting the adjusting screw (51) of the hydro-expansion fixture (52) so that the hydro-expansion fixture (52) is in a clamping state or a released state.

2. The automatic tool changing device for a static pressure spindle according to claim 1, characterized in that, The plurality of screw adjusting components (30) are arranged at equal intervals along the length direction of the tool changer (10).

3. The automatic tool changing device for the hydrostatic spindle according to claim 2, wherein, The screw adjusting component (30) includes: A torque wrench (31); A torque motor mounting plate (32), the torque motor mounting plate (32) is arranged on the upper part of the tool changer (10); A driving member (33), the driving member (33) is arranged on the upper part of the torque motor mounting plate (32), the rotating shaft of the driving member (33) is connected to the torque wrench (31), and the driving member (33) is used for driving the torque wrench (31) to rotate so as to adjust the adjusting screw (51) of the hydro-expansion fixture (52).

4. The automatic tool changing device for a hydrostatic spindle according to claim 3, characterized in that, The rotating shaft of the driving member (33) is detachably connected to the torque wrench (31).

5. The automatic tool changing device for a hydrostatic spindle according to any one of claims 1 to 4, characterized in that, The plurality of locking components (20) are arranged at equal intervals along the length direction of the tool changer (10).

6. The automatic tool changing device for a hydrostatic spindle according to claim 5, characterized in that, The locking component (20) includes: Two clamping mechanisms, a clamping groove (11) is provided at the tool changing station, guide grooves are provided on two opposite side walls of the clamping groove (11), the clamping mechanisms are movably arranged in the guide grooves, and the clamping mechanisms are adapted to switch between a retracted state and an extended state. When the tool passes through the bayonet of the clamping groove (11), the clamping mechanisms are in the retracted state so that the tool is clamped into the clamping groove (11); when the tool enters or exits the clamping groove (11), the clamping mechanisms are in the extended state to lock the tool in the clamping groove (11).

7. The automatic tool changing device for a hydrostatic spindle according to claim 6, characterized in that, The clamping mechanism includes: A bracket (21), the bracket (21) is slidably arranged in the guide groove; An elastic member (22), the elastic member (22) is arranged in the guide groove, one end of the elastic member (22) is connected to the bottom wall of the guide groove, and the other end of the elastic member (22) is connected to one end of the bracket (21) away from the clamping groove (11).

8. The automatic tool changing device for a hydrostatic spindle according to claim 7, wherein, The clamping mechanism further includes: A locking wheel (23), the locking wheel (23) is in rolling fit with one end of the bracket (21) close to the clamping groove (11) through a connecting pin.

9. The automatic tool changing device for a static pressure spindle according to claim 7, characterized in that, A proximity switch (24) is arranged in the clamping groove (11), and the proximity switch (24) is used for sensing whether there is a tool in the clamping groove (11).

10. An automatic tool changing method for a hydrostatic spindle (50), the tool changing method being based on the automatic tool changing device for a hydrostatic spindle according to any one of claims 1 to 9, characterized in that, Comprising: Determine the angle that the hydrostatic spindle (50) needs to rotate during tool change according to the actual position of the adjusting screw (51), and determine the height at which the hydrostatic spindle (50) should be during the tool change process according to the actual position of the tool changer (10), so as to ensure that the height of the adjusting screw (51) matches the height of the rotary wrench; determine the rotation angle required for the rotary wrench when the hydraulic expansion fixture (52) switches between the clamping state and the loosening state; Drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the empty tool change station, ensure that the hydrostatic spindle (50) moves to the position corresponding to the empty tool change station, so that the locking component (20) of the empty tool change station locks the tool; the tool triggers the proximity switch (24) to output a signal to control the driving member (33) to rotate in the reverse direction by a predetermined angle, so that the hydraulic expansion fixture (52) is loosened, and the tool is stored in the tool change station; Control the hydrostatic spindle (50) to first lift to the zero position of the Z-axis, drive the X-axis, Y-axis, and Z-axis of the machine tool to move according to the position information of the target tool, so that the tool shank of the target tool is inserted into the hydraulic expansion fixture (52); control the driving member (33) to rotate in the forward direction by a predetermined angle, so that the hydraulic expansion fixture (52) clamps the tool; drive the tool to move through the hydrostatic spindle (50), so that the locking component (20) releases the locking of the tool; Control the hydrostatic spindle (50) to move to a safe position and lift to the zero position of the Z-axis.

Images