A high-speed machine tool for die processing equipped with an adaptive pre-tightening force spindle structure

Abstract

The present invention relates to the technical field of high-speed machine tool spindles, and discloses a high-speed machine tool for die processing with a spindle structure having an adaptive pre-tightening force, including a high-speed machine tool body and a spindle structure. The spindle structure includes a spindle body, and the entire spindle body is located inside the spindle box of the high-speed machine tool body. The top end of the spindle body is drivingly connected to the output end of the motor inside the spindle box. The bottom end of the spindle body is detachably installed with an upper ring block through a bolt group. This high-speed machine tool for die processing with a spindle structure having an adaptive pre-tightening force can effectively solve the problems in the prior art that high-speed machine tools usually use direct drive by motors, with the motors directly connected to the spindles, without drive belts or gears, thereby reducing transmission losses and improving transmission efficiency and accuracy. However, when the drill bit gets stuck, it is easy to damage the spindle structure or the transmission system of the drill press, and in severe cases, it will also damage the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed machine tool spindles, and particularly to a high-speed machine tool for die processing with a spindle structure having an adaptive pre-tightening force. Background Art

[0002] The motion mode of the high-speed machine tool spindle structure usually depends on the following driving methods: direct drive, belt drive, gear drive, etc. The spindle drive system of a high-speed machine tool usually also has a precision control system, such as a servo control system, to ensure that the spindle can accurately reach the required rotational speed and position to meet the requirements of high-precision machining. In addition, in order to maintain stability during high-speed operation, the spindle system is also equipped with an efficient cooling and lubrication system.

[0003] The spindle structure of a high-speed machine tool is a key part of the machine tool. It is responsible for installing and driving the cutting tool to rotate at a high speed to achieve efficient cutting processing. Direct drive by an electric motor is a commonly used method in high-speed machine tools. The electric motor is directly connected to the spindle without a transmission belt or gear, thereby reducing transmission losses and improving transmission efficiency and accuracy. During the use of existing high-speed machine tools, first, the workpiece material is too hard or contains hard inclusions, resulting in difficulty for the drill bit to penetrate or cut. Second, the drill bit is severely worn and the cutting edge becomes dull, resulting in an increase in cutting force. Third, the cutting fluid is used improperly or insufficiently, and the cutting fluid cannot effectively reach the cutting area, resulting in insufficient cooling and lubrication. All of these can cause the drill bit to get stuck, and then the spindle structure or transmission system of the drill press is damaged. In severe cases, the electric motor may also be damaged. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a high-speed machine tool for die processing with a spindle structure having an adaptive pre-tightening force, which can effectively solve the problems in the prior art that in high-speed machine tools, direct drive by an electric motor is usually adopted, the electric motor is directly connected to the spindle without a transmission belt or gear, thereby reducing transmission losses and improving transmission efficiency and accuracy. When the drill bit gets stuck, it is easy to damage the spindle structure or transmission system of the drill press, and in severe cases, the electric motor may also be damaged.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The present invention provides a high-speed machine tool for die processing with a spindle structure having an adaptive pre-tightening force, including:

[0007] A high-speed machine tool body;

[0008] Spindle structure, the spindle structure includes a spindle body, and the whole of this spindle body is located inside the spindle box of the high-speed machine tool body. The top end of the spindle body is drivingly connected to the output end of the motor inside the spindle box. The bottom end of the spindle body is detachably installed with an upper ring block through a bolt group. One end of the upper ring block away from the spindle body is fitted with a lower ring block. One end of the lower ring block away from the upper ring block is detachably installed with a tool;

[0009] Among them, one end of the lower ring block close to the spindle body is provided with a protective part that is engaged with the upper ring block;

[0010] Among them, a locking part is arranged in the space surrounded by the upper ring block and the lower ring block for pressing the fitting area between the lower ring block and the upper ring block. A sliding rod that can be used to adjust the rotation position of the locking part is arranged in the internal slideway of the spindle body.

[0011] Furthermore, it includes a pushing part. The pushing part includes a fixed magnetic block and a moving magnetic block. The fixed magnetic block and the moving magnetic block are magnetically connected. An activity cavity communicating with the slideway is opened inside the spindle body. The circumferential outer surface of the fixed magnetic block is fixedly connected to the inner wall of the activity cavity through a bracket. The circumferential outer surface of the moving magnetic block is slidably connected to the inner wall chute of the activity cavity through an activity frame. One end of the moving magnetic block away from the fixed magnetic block is rotatably installed with the outer end of the sliding rod.

[0012] Furthermore, several groups of equally spaced engaging holes are opened at one end of the upper ring block close to the lower ring block. An internal cavity whose central axis coincides with that of the engaging holes is opened at one end of the lower ring block close to the spindle body. The protective part includes an engaging rod slidably connected to the inner wall of the internal cavity. A strong spring connected to the inside of the lower ring block is arranged on one side of the engaging rod away from the upper ring block. One end of the engaging rod away from the strong spring is designed to be circular.

[0013] Furthermore, a horn-shaped channel is opened at one end of the engaging rod close to the strong spring. A pre-tightening rod that fits the inner wall of the horn-shaped channel is slidably connected to the inside of the lower ring block. A micro spring connected to the inside of the lower ring block is arranged at one end of the pre-tightening rod away from the horn-shaped channel. A semi-circular sleeve that engages with the spherical end of the pre-tightening rod is fixedly connected to the non-horn-shaped end of the horn-shaped channel.

[0014] Furthermore, in the initial state, the spherical end of the pre-tightening rod is located in the horn-shaped area of the horn-shaped channel. A magnetic rod that magnetically attracts the non-spherical end of the pre-tightening rod is arranged in the space surrounded by the micro spring. The elastic force of the micro spring is greater than the magnetic force of the magnetic rod. The magnetic rod is fixedly connected to the inside of the lower ring block.

[0015] Further, the locking member includes a push rod fixedly connected to the outer end of the sliding rod. One end of the push rod away from the sliding rod is slidably connected with an I-shaped slider through a T-shaped groove. There are two I-shaped sliders, which are symmetrically distributed with the push rod as the center. A triangular frame is rotatably installed on one side of the I-shaped slider away from the push rod through a connecting plate. A shaft rod connected to the inner wall of the upper ring block is rotatably connected inside the triangular frame. A ring plate that fits against the inner wall of the lower ring block is fixedly connected to one side of the triangular frame away from the I-shaped slider.

[0016] Further, a balancing member is arranged between the adjacent surfaces of a pair of the I-shaped sliders. The balancing member includes a return spring. A balancing frame is fixedly connected to the outer end of the return spring. There are two balancing frames, which are symmetrically distributed with the return spring as the center. A balancing rod is rotatably connected inside the balancing frame. One end of the balancing rod away from the balancing frame is slidably connected with a rotating rod that rotates inside the I-shaped slider.

[0017] Further, the adjacent ends of the rotating rod and the balancing rod are magnetically connected.

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0019] The present invention is provided with a main shaft structure. The high-speed rotation driving force of the lower ring block comes from the upper ring block, and the two rotate synchronously. Whether the engaging rod can be stably engaged in the engaging hole all the time depends on the rotation speeds of the upper ring block and the lower ring block. When the rotation speeds of the upper ring block and the lower ring block drop rapidly, the pre-tightening rod quickly resets under the elastic force of the micro spring. At this time, the limit of the pre-tightening rod on the engaging rod disappears. Subsequently, the tool and the lower ring block stop rotating, but the main shaft body and the upper ring block have not yet reduced their rotation speeds. The end of the engaging rod located in the engaging hole is designed in a circular shape, and the circular end of the engaging rod begins to disengage from the engaging hole, and separation begins to occur between the engaging rod and the engaging hole. The engaging rod is pressed and slides into the inner cavity. Furthermore, before the upper ring block decelerates, the upper ring block still maintains its original rotation speed and does not interfere with the already stopped rotating lower ring block, realizing the first-time cut-off of the transmission relationship between the tool and the main shaft body, and protecting the overall main shaft structure and the motor inside the main shaft box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2Schematic three-dimensional structure diagram of the spindle structure according to an embodiment of the present invention;

[0023] Figure 3 Schematic three-dimensional sectional structure diagram of the spindle structure according to an embodiment of the present invention;

[0024] Figure 4 According to an embodiment of the present invention Figure 3 Schematic diagram of the enlarged structure of part A in the figure;

[0025] Figure 5 Schematic three-dimensional sectional structure diagram of the partial spindle structure according to an embodiment of the present invention;

[0026] Figure 6 According to an embodiment of the present invention Figure 5 Schematic diagram of the enlarged structure of part B in the figure;

[0027] Figure 7 Schematic three-dimensional structure diagram of the upper ring block and the locking member according to an embodiment of the present invention;

[0028] Figure 8 According to an embodiment of the present invention Figure 7 Schematic diagram of the enlarged structure of part C in the figure;

[0029] Figure 9 Schematic three-dimensional sectional structure diagram of the lower ring block according to an embodiment of the present invention;

[0030] Figure 10 Schematic three-dimensional structure diagram of the upper ring block and the locking member according to an embodiment of the present invention;

[0031] Figure 11 According to an embodiment of the present invention Figure 10 Schematic diagram of the enlarged structure of part D in the figure.

[0032] The reference numerals in the figure respectively represent: 1, high-speed machine tool body; 2, spindle structure; 21, spindle body; 211, movable cavity; 22, upper ring block; 221, engaging hole; 23, lower ring block; 231, built-in cavity; 24, cutting tool; 25, protective member; 251, engaging rod; 252, strong spring; 253, horn channel; 254, pre-tightening rod; 255, micro spring; 256, semi-circular sleeve; 257, magnetic rod; 26, locking member; 261, push rod; 262, I-shaped slider; 263, triangular frame; 264, ring plate; 27, sliding rod; 3, pushing part; 31, fixed magnetic block; 32, movable magnetic block; 4, balancing member; 41, return spring; 42, balancing frame; 43, balancing rod; 44, rotating rod. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, 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 of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention will be further described below in conjunction with embodiments.

[0035] Embodiment:

[0036] Please refer to Figures 1 - 11 , the present invention provides a technical solution: a high-speed machine tool for mold processing equipped with an adaptive pre-tightening force spindle structure, including:

[0037] The high-speed machine tool body 1;

[0038] The spindle structure 2, the spindle structure 2 includes a spindle body 21, and the whole spindle body 21 is located inside the spindle box of the high-speed machine tool body 1. The top end of the spindle body 21 is in transmission connection with the output end of the motor inside the spindle box. The bottom end of the spindle body 21 is detachably installed with an upper ring block 22 through a bolt group. One end of the upper ring block 22 away from the spindle body 21 is fitted with a lower ring block 23, and one end of the lower ring block 23 away from the upper ring block 22 is detachably installed with a tool 24;

[0039] Wherein, a protective part 25 that engages with the upper ring block 22 is provided at one end of the lower ring block 23 close to the spindle body 21;

[0040] Wherein, a locking part 26 is provided in the space surrounded by the upper ring block 22 and the lower ring block 23 for pressing the fitting area of the lower ring block 23 and the upper ring block 22. A slide rod 27 that can be used to adjust the rotation position of the locking part 26 is provided in the internal slideway of the spindle body 21.

[0041] It further includes a pushing part 3. The pushing part 3 includes a fixed magnetic block 31 and a moving magnetic block 32, which are magnetically connected to each other. An activity cavity 211 communicating with the slideway is opened inside the spindle body 21. The circumferential outer surface of the fixed magnetic block 31 is fixedly connected to the inner wall of the activity cavity 211 through a bracket. The circumferential outer surface of the moving magnetic block 32 is slidably connected to the inner wall chute of the activity cavity 211 through a movable frame. One end of the moving magnetic block 32 away from the fixed magnetic block 31 is rotatably installed with the outer end of the slide rod 27.

[0042] One end of the upper ring block 22 close to the lower ring block 23 is provided with several groups of equally spaced engaging holes 221. One end of the lower ring block 23 close to the main shaft body 21 is provided with an inner cavity 231 whose central axis coincides with that of the engaging holes 221. The protective member 25 includes an engaging rod 251 slidably connected to the inner wall of the inner cavity 231. On the side of the engaging rod 251 away from the upper ring block 22, there is a strong spring 252 connected to the inside of the lower ring block 23. One end of the engaging rod 251 away from the strong spring 252 is designed to be circular.

[0043] One end of the engaging rod 251 close to the strong spring 252 is provided with a horn-shaped channel 253. Inside the lower ring block 23, there is a pre-tightening rod 254 slidably connected and fitting the inner wall of the horn-shaped channel 253. One end of the pre-tightening rod 254 away from the horn-shaped channel 253 is provided with a micro spring 255 connected to the inside of the lower ring block 23. The non-horn-shaped end of the horn-shaped channel 253 is fixedly connected to a semi-circular sleeve 256 that engages with the spherical end of the pre-tightening rod 254.

[0044] In the initial state, the spherical end of the pre-tightening rod 254 is located in the horn-shaped region of the horn-shaped channel 253. Inside the space enclosed by the micro spring 255, there is a magnetic rod 257 that magnetically attracts the non-spherical end of the pre-tightening rod 254. The elastic force of the micro spring 255 is greater than the magnetic force of the magnetic rod 257. The magnetic rod 257 is fixedly connected to the inside of the lower ring block 23.

[0045] The locking member 26 includes a push rod 261 fixedly connected to the outer end of the sliding rod 27. One end of the push rod 261 away from the sliding rod 27 is slidably connected to an I-shaped slider 262 through a T-shaped groove. There are two I-shaped sliders 262 symmetrically distributed with the push rod 261 as the center. On the side of the I-shaped slider 262 away from the push rod 261, a triangular frame 263 is rotatably installed through a connecting plate. Inside the triangular frame 263, there is a shaft rod connected to the inner wall of the upper ring block 22. On the side of the triangular frame 263 away from the I-shaped slider 262, there is a ring plate 264 fixedly connected and fitting the inner wall of the lower ring block 23.

[0046] Between the adjacent faces of a pair of I-shaped sliders 262, there is a balancing member 4. The balancing member 4 includes a reset spring 41. The outer end of the reset spring 41 is fixedly connected to a balancing frame 42. There are two balancing frames 42 symmetrically distributed with the reset spring 41 as the center. Inside the balancing frame 42, there is a balancing rod 43 rotatably connected. One end of the balancing rod 43 away from the balancing frame 42 is slidably connected to a rotating rod 44 that rotates inside the I-shaped slider 262.

[0047] The adjacent ends of the rotating rod 44 and the balancing rod 43 are magnetically connected.

[0048] Reference Figures 1 - 11High-speed machine tools are usually driven directly by motors. The motor is directly connected to the spindle without a transmission belt or gears, thereby reducing transmission losses and improving transmission efficiency and accuracy. When the drill bit is stuck, it is easy to cause damage to the spindle structure or transmission system of the drilling machine, and in severe cases, the motor may be damaged. In order to overcome the above defects, this application designs a mold processing high-speed machine tool equipped with an adaptive preload spindle structure.

[0049] The main body of the spindle structure 2 in the present application adopts a detachable structure, and the upper ring block 22 and the lower ring block 23 on the spindle structure 2 can be quickly installed or removed by using the locking member 26.

[0050] Installation of upper ring block 22 and lower ring block 23:

[0051] Specifically, initially, the spindle body 21 on the spindle structure 2 is installed inside the spindle box, and the motor output end inside the spindle box is directly connected to the top of the spindle body 21 to achieve direct drive without a transmission belt or gear, thereby reducing transmission loss and improving transmission efficiency and accuracy. Next, manually align the top of the lower ring block 23 with the bottom of the upper ring block 22 (in the working state, the spindle structure 2 is in a vertical state as a whole). At the same time, the locking rod 251 on the protective member 25 is locked into the locking hole 221 of the upper ring block 22; then, the fixed magnetic block 31 and the moving magnetic block 32 on the pushing part 3 are energized, and the magnetic force of the fixed magnetic block 31 generates a downward thrust on the moving magnetic block 32, driving the moving magnetic block 32 to slide down a short distance along the inner wall groove of the active cavity 211, driving the slide rod 27 along the spindle body The internal slideway of the body 21 performs a "short-distance damping slide" downward, driving the push rod 261 on the locking member 26 to slide downward for a short distance, and the I-shaped slider 262 moves synchronously with the push rod 261, and drives the tripod 263 to rotate around the shaft rod on the inner wall of the upper ring block 22 (the I-shaped slider 262 slides along the T-slot of the push rod 261), and the rotation of the tripod 263 drives the ring plate 264 to press against the inner wall of the lower ring block 23. At this time, the ring plate 264, the lower ring block 23 and the upper ring block 22 are combined into a whole.

[0052] It should be noted that: First, the upper ring block 22 and the lower ring block 23 on the main shaft structure 2 can be quickly installed (just insert the engaging rod 251 into the engaging hole 221 and use the locking member 26 to press tightly). After the installation is completed, the sliding rod 27 can maintain the overall stability of the locking member 26 by its own gravity (the gravity of the sliding rod 27 is greater than the gravity of the lower ring block 23 and the tool 24), and the lower ring block 23 and the upper ring block 22 are always in a fitting state; when the tool 24 needs to be started, the fixed magnetic block 31 and the moving magnetic block 32 on the pushing portion 3 are preferentially energized, and the ring plate 264, the lower ring block 23 and the upper ring block 22 are combined into a whole to maintain the stability of the machining process. Second, after the upper ring block 22 and the lower ring block 23 are combined, in the vertical direction, the upper ring block 22 and the lower ring block 23 can be combined into a whole by using the locking member 26, and in the circumferential direction, the engaging rod 251 on the protective member 25 is used to combine the locking member 26, the upper ring block 22 and the lower ring block 23 into a whole; at the same time, the circumferential outer surface of the upper ring block 22 is also provided with an edge plate that can be used to wrap the circumferential outer surface of the lower ring block 23 for further protection of the lower ring block 23. Third, when the tool 24 is stuck, the traditional main shaft and the tool cannot be separated, and there is a great hidden danger in maintenance. On the contrary, in this application, the power-on of the fixed magnetic block 31 and the moving magnetic block 32 on the pushing portion 3 changes, and the magnetic force between the fixed magnetic block 31 and the moving magnetic block 32 starts to attract each other, driving the ring plate 264 to disengage from the lower ring block 23, and the lower ring block 23 and the upper ring block 22 start to separate, realizing the rapid separation between the main shaft body 21 and the tool 24, which is convenient for the maintenance of the tool 24.

[0053] Working process of the main shaft structure 2:

[0054] The motor output end inside the headstock drives the main shaft body 21, the upper ring block 22, the locking member 26, the lower ring block 23, the protective member 25, and the cutting tool 24 to rotate at high speed to machine the workpiece. It should be noted that as the rotation speeds of the upper ring block 22 and the lower ring block 23 continue to increase, the centrifugal force on the pre-tightening rod 254 on the protective member 25 continuously increases, and the pre-tightening rod 254 begins to disengage from the magnetic rod 257. The micro spring 255 is stretched and undergoes elastic deformation. The spherical end of the pre-tightening rod 254 quickly snaps into the semi-circular sleeve 256 through the horn-shaped channel 253. Subsequently, during the high-speed rotation of the upper ring block 22 and the lower ring block 23, the spherical end of the pre-tightening rod 254 is always stuck in the semi-circular sleeve 256 to maintain the force balance of the pre-tightening rod 254, prevent deformation due to unidirectional force, and further prevent the engaging rod 251 from moving around and always being engaged in the engaging hole 221, greatly improving the stability of the high-speed rotation of the upper ring block 22 and the lower ring block 23. It should be added that the high-speed rotation driving force of the cutting tool 24 comes from the lower ring block 23, and the high-speed rotation driving force of the lower ring block 23 comes from the upper ring block 22. The two rotate synchronously with the help of the engaging rod 251. At the same time, the ring plate 264 on the locking member 26 is mainly used to make the upper ring block 22 and the lower ring block 23 fit tightly. The rotation power source of the lower ring block 23 does not need to be provided by the locking member 26, and the locking member 26 will also rotate at high speed synchronously with the upper ring block 22 and the lower ring block 23.

[0055] For example, if the drill bit is severely worn and the cutting edge becomes dull, resulting in an increase in cutting force. Secondly, if the cutting fluid is used improperly or insufficiently and cannot effectively reach the cutting area, resulting in insufficient cooling and lubrication, both will cause the drill bit to get stuck. The rotation speed of the drill bit will drop rapidly. If the transmission relationship between the drill bit and the main shaft cannot be cut off immediately, it will cause damage to the main shaft structure or the transmission system, and in severe cases, it will even damage the motor. On the contrary, the protective member 25 adopted in this application can effectively avoid the above problems.

[0056] Specifically, the high-speed rotation driving force of the lower ring block 23 comes from the upper ring block 22, and the two rotate synchronously with the help of the locking rod 251. Whether the locking rod 251 can be stably engaged in the locking hole 221 all the time depends on the rotation speed of the upper ring block 22 and the lower ring block 23; when the rotation speed of the upper ring block 22 and the lower ring block 23 is gradually increased to a high-speed rotation process, the pre-tightening rod 254 is always located in the semicircular sleeve 256 under the action of centrifugal force, and the locking rod 251 is engaged in the locking hole 221, so that the upper ring block 22 and the lower ring block 23 always rotate synchronously; when the rotation speed of the upper ring block 22 and the lower ring block 23 drops rapidly, the pre-tightening rod 254 is quickly reset under the elastic force of the micro spring 255 (the magnetic rod 257 accelerates the reset of the pre-tightening rod 254, but there is still a small gap between the magnetic rod 257 and the pre-tightening rod 254 for subsequent The spherical end of the pre-tightening rod 254 disengages from the bell-mouth area). At this time, the limiting effect of the pre-tightening rod 254 on the locking rod 251 disappears. Subsequently, the tool 24 and the lower ring block 23 stop rotating, but the spindle body 21 and the upper ring block 22 have not yet reduced their rotation speeds. The end of the locking rod 251 located in the locking hole 221 adopts a circular design. The circular end of the locking rod 251 begins to disengage from the locking hole 221, and the locking rod 251 and the locking hole 221 begin to separate. The locking rod 251 is pressed to slide into the interior of the built-in cavity 231 (the strong spring 252 undergoes elastic deformation). Therefore, before the upper ring block 22 slows down, the upper ring block 22 still maintains its original rotation speed and will not interfere with the lower ring block 23 that has stopped rotating, thereby cutting off the transmission relationship between the tool 24 and the spindle body 21 as soon as possible, protecting the spindle structure 2 as a whole and the motor inside the spindle box.

[0057] In order to further improve the overall stability of the locking member 26, the present application also has a balancing member 4. After the "locking member 26 is unfolded", the ring plate 264 presses against the inner wall of the lower ring block 23, and the ring plate 264, the lower ring block 23 and the upper ring block 22 are combined into a whole. At this time, the balancing frame 42, the balancing rod 43, and the rotating rod 44 are also unfolded, but the balancing frame 42, the balancing rod 43 and the rotating rod 44 have not yet reached the "vertical state", and the magnetic force between the adjacent ends of the rotating rod 44 and the balancing rod 43 repels each other, and the return spring 41 reaches a balanced state. As the locking member 26 rotates at a high speed as a whole, the balancing frame 42 performs a further short-distance movement outward under the action of centrifugal force until the balancing rod 43 and the rotating rod 44 rotate to a vertical state (the I-shaped slider 262 limits the rotating rod 44). The balancing rod 43 and the rotating rod 44 overcome the magnetic force between the adjacent ends and begin to straighten and tighten the two sets of I-shaped sliders 262 to prevent the I-shaped sliders 262 from loosening during the high-speed rotation process, thereby affecting the overall stability.

[0058] 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 on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-speed machine tool for mold processing equipped with an adaptive preload spindle structure, characterized in that: include: High-speed machine tool body (1); A spindle structure (2), wherein the spindle structure (2) comprises a spindle body (21), and the spindle body (21) is integrally located inside a spindle box of a high-speed machine tool body (1), the top end of the spindle body (21) is drivingly connected to an output end of a motor inside the spindle box, an upper ring block (22) is detachably mounted on the bottom end of the spindle body (21) via a bolt group, a lower ring block (23) is fittedly mounted on one end of the upper ring block (22) away from the spindle body (21), and a tool (24) is detachably mounted on one end of the lower ring block (23) away from the upper ring block (22); Wherein, a protective piece (25) engaging with the upper ring block (22) is provided at one end of the lower ring block (23) close to the main shaft body (21); A locking member (26) is provided in the space enclosed by the upper ring block (22) and the lower ring block (23) for tightening the fitting area between the lower ring block (23) and the upper ring block (22); and a sliding rod (27) for adjusting the rotation position of the locking member (26) is provided in the internal slideway of the main shaft body (21); The driving part (3) further comprises a driving part (3), wherein the driving part (3) comprises a fixed magnetic block (31) and a moving magnetic block (32), wherein the fixed magnetic block (31) and the moving magnetic block (32) are magnetically connected to each other, wherein an active cavity (211) connected to a slideway is provided inside the spindle body (21), wherein the circumferential outer surface of the fixed magnetic block (31) is fixedly connected to the inner wall of the active cavity (211) through a bracket, and the circumferential outer surface of the moving magnetic block (32) is slidably connected to the inner wall slide groove of the active cavity (211) through a movable bracket, and the moving magnetic block (32) is rotatably mounted on the outer end of the slide rod (27) at one end away from the fixed magnetic block (31); The upper ring block (22) is provided with a plurality of groups of equally spaced engaging holes (221) at one end close to the lower ring block (23); the lower ring block (23) is provided with a built-in cavity (231) that coincides with the central axis of the engaging hole (221) at one end close to the main shaft body (21); the protective member (25) comprises a locking rod (251) that is slidably connected to the inner wall of the built-in cavity (231); a strong spring (252) that is connected to the inside of the lower ring block (23) is provided on the side of the locking rod (251) that is away from the upper ring block (22); and the end of the locking rod (251) that is away from the strong spring (252) is circular in design; The locking member (26) comprises a push rod (261) fixedly connected to the outer end of the slide rod (27); the push rod (261) is slidably connected to an I-shaped slider (262) at one end away from the slide rod (27) through a T-shaped slot; two I-shaped sliders (262) are provided and are symmetrically distributed around the push rod (261); a tripod (263) is rotatably installed at one side of the I-shaped slider (262) away from the push rod (261) through a connecting plate; a shaft connected to the inner wall of the upper ring block (22) is rotatably connected inside the tripod (263); and a ring plate (264) that fits the inner wall of the lower ring block (23) is fixedly connected to one side of the tripod (263) away from the I-shaped slider (262).

2. A mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 1, characterized in that: The engaging rod (251) is provided with a horn channel (253) at one end close to the strong spring (252); the lower ring block (23) is internally slidably connected with a pre-tightening rod (254) that fits the inner wall of the horn channel (253); the pre-tightening rod (254) is provided with a micro spring (255) connected to the interior of the lower ring block (23) at one end away from the horn channel (253); and the non-bell mouth end of the horn channel (253) is fixedly connected with a semicircular sleeve (256) that fits the spherical end of the pre-tightening rod (254).

3. A mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 2, characterized in that: In the initial state, the spherical end of the pre-tightening rod (254) is located in the bell mouth area of ​​the bell channel (253), and a magnetic rod (257) magnetically attracted to the non-spherical end of the pre-tightening rod (254) is provided in the space surrounded by the micro spring (255), the elastic force of the micro spring (255) is greater than the magnetic force of the magnetic rod (257), and the magnetic rod (257) is fixedly connected to the inside of the lower ring block (23).

4. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 1, characterized in that: A balancing member (4) is arranged between adjacent surfaces of a pair of I-shaped sliders (262), the balancing member (4) comprising a reset spring (41), the outer end of the reset spring (41) being fixedly connected to a balancing frame (42), the balancing frame (42) being provided with two symmetrically distributed around the reset spring (41), the interior of the balancing frame (42) being rotatably connected to a balancing rod (43), the end of the balancing rod (43) away from the balancing frame (42) being slidably connected to a rotating rod (44) rotating with the interior of the I-shaped slider (262).

5. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 4, characterized in that: The rotating rod (44) is magnetically connected to the adjacent ends of the balancing rod (43).

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