Die machining high-speed machine tool with self-adaptive pretightening force main shaft structure

Abstract

The invention relates to the technical field of high-speed machine tool spindles, and discloses a die machining high-speed machine tool with a self-adaptive pretightening force spindle structure, which comprises a high-speed machine tool body and a spindle structure, the spindle structure comprises a spindle body, and the spindle body is integrally positioned in a spindle box of the high-speed machine tool body. The top end of the main shaft body is in transmission connection with the output end of a motor in the main shaft box, and an upper ring block is detachably installed at the bottom end of the main shaft body through a bolt set. The die machining high-speed machine tool with the self-adaptive pre-tightening force main shaft structure can effectively solve the problems that in the prior art, a high-speed machine tool is usually directly driven by a motor, the motor is directly connected with the main shaft, and no transmission belt or gear exists, so that transmission loss is reduced, transmission efficiency and precision are improved, and when a drill bit is stuck, the drill bit cannot be damaged. And a main shaft structure or a transmission system of the drilling machine is easily damaged, and a motor is also damaged in severe cases.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed machine tool spindles, and in particular to a mold processing high-speed machine tool equipped with an adaptive preload force spindle structure. Background Art

[0002] The way the spindle structure of a high-speed machine tool moves usually depends on the following drive methods: direct drive, belt drive, and gear drive, etc. The spindle drive system of a high-speed machine tool is usually equipped with a precise control system, such as a servo control system, to ensure that the spindle can accurately reach the required 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 high speed to achieve efficient cutting processing. Motor direct drive is a commonly used method in high-speed machine tools. The 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, making it difficult for the drill to penetrate or cut. Secondly, the drill bit is severely worn and the cutting edge becomes blunt, resulting in increased cutting force. Thirdly, the cutting fluid is used improperly or insufficiently, and the cutting fluid cannot effectively reach the cutting area, resulting in insufficient cooling and lubrication, which will cause the drill bit to get stuck, and then the spindle structure or transmission system of the drilling machine is damaged, and in severe cases, the motor will be damaged. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-speed machine tool for mold processing equipped with an adaptive preload force spindle structure, which can effectively solve the problem in the prior art that high-speed machine tools are usually directly driven by motors, and the motors are directly connected to the spindles without transmission belts or gears, thereby reducing transmission losses and improving transmission efficiency and accuracy. When the drill bit is stuck, the spindle structure or transmission system of the drilling machine is easily damaged, and in serious cases, the motor may be damaged.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a high-speed machine tool for mold processing equipped with an adaptive preload force spindle structure, comprising: High-speed machine tool body; A spindle structure, wherein the spindle structure comprises a spindle body, and the spindle body is integrally located inside a spindle box of a high-speed machine tool body, the top end of the spindle body is transmission-connected to the output end of a motor inside the spindle box, the bottom end of the spindle body is detachably mounted with an upper ring block through a bolt group, the end of the upper ring block away from the spindle body is fitted with a lower ring block, and the end of the lower ring block away from the upper ring block is detachably mounted with a tool; Wherein, a protective piece engaging with the upper ring block is provided at one end of the lower ring block close to the main shaft body; A locking piece is provided in the space enclosed by the upper ring block and the lower ring block for tightening the fitting area between the lower ring block and the upper ring block, and a sliding rod for adjusting the rotation position of the locking piece is provided in the internal slideway of the main shaft body.

[0006] Furthermore, it includes a pushing part, which includes a fixed magnetic block and a moving magnetic block. The fixed magnetic block and the moving magnetic block are magnetically connected, and an active cavity connected to the slideway is opened inside the main shaft body. The circumferential outer surface of the fixed magnetic block is fixedly connected to the inner wall of the active cavity through a bracket, and the circumferential outer surface of the moving magnetic block is slidably connected to the slide groove of the inner wall of the active cavity through a movable bracket. The moving magnetic block is rotatably installed with the outer end of the slide rod away from one end of the fixed magnetic block.

[0007] Furthermore, the upper ring block is provided with a plurality of groups of equidistantly distributed engaging holes at one end close to the lower ring block, and the lower ring block is provided with a built-in cavity which coincides with the central axis of the engaging holes at one end close to the main shaft body, and the protective member includes a locking rod which is slidably connected to the inner wall of the built-in cavity, and a strong spring which is connected to the inside of the lower ring block is provided on the side of the locking rod away from the upper ring block, and the end of the locking rod away from the strong spring adopts a circular design.

[0008] Furthermore, a horn channel is provided at one end of the engaging rod close to the strong spring, and a pre-tensioning rod which fits the inner wall of the horn channel is slidably connected to the interior of the lower ring block, a micro spring connected to the interior of the lower ring block is provided at one end of the pre-tensioning rod away from the horn channel, and a semicircular sleeve which fits the spherical end of the pre-tensioning rod is fixedly connected to the non-bell mouth end of the horn channel.

[0009] Furthermore, in the initial state, the spherical end of the preload rod is located in the bell mouth area of ​​the bell channel, and a magnetic rod magnetically attracted to the non-spherical end of the preload rod is provided in the space enclosed by the micro spring, the elastic force of the micro spring is greater than the magnetic force of the magnetic rod, and the magnetic rod is fixedly connected to the inside of the lower ring block.

[0010] Furthermore, the locking member includes a push rod fixedly connected to the outer end of the sliding rod, and the push rod is slidably connected to an I-shaped slider at one end away from the sliding rod through a T-slot, and the I-shaped slider is provided with two and symmetrically distributed around the push rod. A tripod is rotatably installed on the side of the I-shaped slider away from the push rod through a connecting plate, and an axle rod connected to the inner wall of the upper ring block is rotatably connected inside the tripod, and a ring plate that fits the inner wall of the lower ring block is fixedly connected to the side of the tripod away from the I-shaped slider.

[0011] Furthermore, a balancing piece is arranged between adjacent surfaces of a pair of I-shaped sliders, and the balancing piece includes a reset spring, and the outer end of the reset spring is fixedly connected to a balancing frame, and the balancing frame is provided with two and symmetrically distributed with the reset spring as the center, and the internal balancing frame is rotatably connected to a balancing rod, and the end of the balancing rod away from the balancing frame is slidably connected to a rotating rod that rotates with the inside of the I-shaped slider.

[0012] Furthermore, the rotating rod and the adjacent ends of the balancing rod are magnetically connected.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a spindle structure, and 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 speed of the upper ring block and the lower ring block; when the rotation speed of the upper ring block and the lower ring block drops rapidly, the pre-tightening rod is quickly reset under the elastic force of the micro-spring. At this time, the limit of the pre-tightening rod on the engaging rod disappears, and then the tool and the lower ring block stop rotating, but the spindle body and the upper ring block have not yet reduced the rotation speed. The end of the engaging rod located in the engaging hole adopts a circular design, and the circular end of the engaging rod begins to disengage from the engaging hole, and the engaging rod and the engaging hole begin to separate. The engaging rod is pressed to slide into the inner part of the built-in cavity, and then before the upper ring block is decelerated, the upper ring block still maintains the original rotation speed and will not interfere with the lower ring block that has stopped rotating, so as to cut off the transmission relationship between the tool and the spindle body in the first time, and protect the overall spindle structure and the motor inside the spindle box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the main shaft structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of a main shaft structure according to an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 3 A schematic diagram of the structure with a partial enlargement at the center; Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of a local main shaft structure of an embodiment of the present invention; Figure 6 For the embodiment of the present invention Figure 5 A schematic diagram of the structure with a partial enlargement at B in the middle; Figure 7 It is a three-dimensional structural schematic diagram of the upper ring block and the locking member in an embodiment of the present invention; Figure 8 For the embodiment of the present invention Figure 7 A schematic diagram of the structure with a partial enlargement at C in the middle; Fig. 9 It is a schematic diagram of a three-dimensional partial cross-sectional structure of a lower ring block according to an embodiment of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the upper ring block and the locking member according to an embodiment of the present invention; Fig.11 For the embodiment of the present invention Fig.10 D is a schematic diagram of the partially enlarged structure.

[0016] The numbers in the figure 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. tool; 25. protective part; 251. engaging rod; 252. strong spring; 253. speaker channel; 254. preload rod; 255. micro spring; 256. semicircular sleeve; 257. magnetic rod; 26. locking part; 261. push rod; 262. I-shaped slide block; 263. tripod; 264. ring plate; 27. slide rod; 3. pushing part; 31. fixed magnetic block; 32. moving magnetic block; 4. balancing part; 41. reset spring; 42. balancing frame; 43. balancing rod; 44. rotating rod. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] Example:

[0020] See also Figure 1-Figure 11 The present invention provides a technical solution: a high-speed machine tool for mold processing equipped with an adaptive preload force spindle structure, comprising: High-speed machine tool body 1; The spindle structure 2 includes a spindle body 21, and the spindle body 21 is integrally located inside the spindle box of the high-speed machine tool body 1. The top of the spindle body 21 is transmission-connected to the output end of the motor inside the spindle box. The bottom of the spindle body 21 is detachably mounted with an upper ring block 22 through a bolt group. The end of the upper ring block 22 away from the spindle body 21 is fitted with a lower ring block 23. The end of the lower ring block 23 away from the upper ring block 22 is detachably mounted with a tool 24. Among them, a protective member 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 piece 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 piece 26 is provided in the internal slideway of the main shaft body 21 .

[0021] It also includes a pushing part 3, which includes a fixed magnetic block 31 and a moving magnetic block 32. The fixed magnetic block 31 and the moving magnetic block 32 are magnetically connected. An active cavity 211 connected to the slideway is opened inside the main shaft body 21. 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. The circumferential outer surface of the moving magnetic block 32 is slidably connected to the inner wall groove of the active cavity 211 through a movable frame. The moving magnetic block 32 is rotatably installed with the outer end of the slide rod 27 away from the fixed magnetic block 31.

[0022] 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, and the lower ring block 23 is provided with a built-in cavity 231 which coincides with the central axis of the engaging hole 221 at one end close to the main shaft body 21. The protective member 25 includes a locking rod 251 which is slidably connected to the inner wall of the built-in cavity 231, and a strong spring 252 which is connected to the inside of the lower ring block 23 is provided on the side of the locking rod 251 away from the upper ring block 22, and the end of the locking rod 251 away from the strong spring 252 adopts a circular design.

[0023] A horn channel 253 is provided at one end of the locking rod 251 close to the strong spring 252, and a pre-tightening rod 254 that fits the inner wall of the horn channel 253 is slidably connected to the interior of the lower ring block 23. A micro spring 255 that is connected to the interior of the lower ring block 23 is provided at the end of the pre-tightening rod 254 that is away from the horn channel 253, and a semicircular sleeve 256 that engages with the spherical end of the pre-tightening rod 254 is fixedly connected to the non-bell mouth end of the horn channel 253.

[0024] 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.

[0025] The locking member 26 includes a push rod 261 fixedly connected to the outer end of the slide rod 27, and 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-slot. Two I-shaped sliders 262 are provided and are symmetrically distributed with the push rod 261 as the center. A tripod 263 is rotatably installed on the side of the I-shaped slider 262 away from the push rod 261 through a connecting plate. The inside of the tripod 263 is rotatably connected to a shaft connected to the inner wall of the upper ring block 22, and the side of the tripod 263 away from the I-shaped slider 262 is fixedly connected to a ring plate 264 that fits the inner wall of the lower ring block 23.

[0026] A balancing piece 4 is arranged between adjacent surfaces of a pair of I-shaped sliders 262. The balancing piece 4 includes a reset spring 41. The outer end of the reset spring 41 is fixedly connected to a balancing frame 42. The balancing frame 42 is provided with two and is symmetrically distributed with the reset spring 41 as the center. The internal balancing frame 42 is rotatably connected to a balancing rod 43. The end of the balancing rod 43 away from the balancing frame 42 is slidably connected to a rotating rod 44 that rotates with the inside of the I-shaped slider 262.

[0027] The rotating rod 44 is magnetically connected to the adjacent ends of the balancing rod 43 .

[0028] refer to Figure 1-Figure 11 High-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.

[0029] 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.

[0030] Installation of upper ring block 22 and lower ring block 23: 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.

[0031] It is worth mentioning that: first, the upper ring block 22 and the lower ring block 23 on the spindle structure 2 can be quickly installed (the locking rod 251 can be inserted into the locking hole 221, and the locking piece 26 is used to tighten it). After the installation is completed, the slide bar 27 uses its own gravity (the gravity of the slide bar 27 is greater than the gravity of the lower ring block 23 and the tool 24) to maintain the overall stability of the locking piece 26, and the lower ring block 23 and the upper ring block 22 are always in a fitted state; when the tool 24 needs to be started, the fixed magnetic block 31 and the moving magnetic block 32 on the pushing part 3 are energized first, 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 processing process. Secondly, after the upper ring block 22 and the lower ring block 23 are combined, in the vertical direction, the locking piece 26 can be used to combine the upper ring block 22 and the lower ring block 23 into a whole, and in the circumferential direction, the locking piece 26, the upper ring block 22 and the lower ring block 23 are combined into a whole by using the locking rod 251 on the protective piece 25; 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, so as to further protect the lower ring block 23. Secondly, when the tool 24 is stuck, the traditional spindle and the tool cannot be separated, and there is a great safety hazard in maintenance. In contrast, in the present application, the fixed magnetic block 31 and the moving magnetic block 32 on the pushing part 3 are energized and changed, and the fixed magnetic block 31 and the moving magnetic block 32 begin to be magnetically attracted to each other, driving the ring plate 264 to separate from the lower ring block 23, and the lower ring block 23 and the upper ring block 22 begin to separate, thereby realizing the rapid separation between the spindle body 21 and the tool 24, and facilitating the maintenance of the tool 24.

[0032] Working process of spindle structure 2: The motor output end inside the spindle box drives the spindle body 21, the upper ring block 22, the locking member 26, the lower ring block 23, the protective member 25 and the tool 24 to rotate at high speed to process the workpiece. It should be noted that as the rotation speed of the upper ring block 22 and the lower ring block 23 continues to increase, the centrifugal force on the preload rod 254 on the protective member 25 continues to increase, the preload rod 254 begins to separate from the magnetic rod 257, the micro spring 255 is elastically deformed by tension, and the spherical end of the preload rod 254 is quickly clamped into the semicircular sleeve 256 through the horn 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 preload rod 254 is always clamped in the semicircular sleeve 256 to maintain the force balance of the preload rod 254 and prevent unidirectional force deformation, so that the clamping rod 251 cannot move and is always clamped in the clamping hole 221, which greatly improves the stability of the high-speed rotation of the upper ring block 22 and the lower ring block 23. It should be noted that the high-speed rotation driving force of the 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 each other with the help of the locking rod 251. At the same time, the ring plate 264 on the locking piece 26 is mainly used for the close fitting of the upper ring block 22 and the lower ring block 23. The rotation power source of the lower ring block 23 does not need to be provided by the locking piece 26, and the locking piece 26 will also rotate synchronously with the upper ring block 22 and the lower ring block 23 at high speed.

[0033] For example, the drill bit is severely worn and the cutting edge becomes blunt, resulting in increased cutting force. Secondly, the cutting fluid is used improperly or insufficiently, and the cutting fluid cannot effectively reach the cutting area, resulting in insufficient cooling and lubrication, which will cause the drill bit to get stuck. The drill bit's rotation speed will drop rapidly. If the transmission relationship between the drill bit and the spindle cannot be cut off immediately, the spindle structure or transmission system will be damaged, and in severe cases, the motor will be damaged. In contrast, the present application uses a protective member 25 to effectively avoid the above-mentioned problems.

[0034] 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.

[0035] 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.

[0036] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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), the spindle structure (2) comprising 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, the bottom end of the spindle body (21) is detachably mounted with an upper ring block (22) via a bolt group, the upper ring block (22) is fitted with a lower ring block (23) at one end away from the spindle body (21), and the lower ring block (23) is detachably mounted with a tool (24) at one end 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 rotational position of the locking member (26) is provided in the internal slideway of the main shaft body (21).

2. A mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 1, characterized in that: The invention also comprises a pushing part (3), wherein the pushing 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 main shaft 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) via a bracket, wherein the circumferential outer surface of the moving magnetic block (32) is slidably connected to the slide groove on the inner wall of the active cavity (211) via a movable bracket, and wherein the end of the moving magnetic block (32) away from the fixed magnetic block (31) is rotatably mounted to the outer end of the slide rod (27).

3. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 1, characterized in that: 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 holes (221) at one end close to the main shaft body (21); the protective member (25) comprises an engaging rod (251) slidably connected to the inner wall of the built-in cavity (231); a strong spring (252) connected to the interior of the lower ring block (23) is provided on a side of the engaging rod (251) away from the upper ring block (22); and the end of the engaging rod (251) away from the strong spring (252) is circular in design.

4. A mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 3, characterized in that: The engaging rod (251) is provided with a horn channel (253) at one end close to the strong spring (252); a pre-tightening rod (254) is slidably connected to the interior of the lower ring block (23) and is fitted with the inner wall of the horn channel (253); a micro spring (255) connected to the interior of the lower ring block (23) is provided at one end of the pre-tightening rod (254) away from the horn channel (253); and a semicircular sleeve (256) is fixedly connected to the spherical end of the pre-tightening rod (254) at the non-horn mouth end of the horn channel (253).

5. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 4, characterized in that: In an initial state, the spherical end of the preload rod (254) is located in the horn mouth area of ​​the horn channel (253), a magnetic rod (257) magnetically attracted to the non-spherical end of the preload rod (254) is provided in the space enclosed 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 interior of the lower ring block (23).

6. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 1, characterized in that: The locking member (26) comprises a push rod (261) fixedly connected to the outer end of the slide rod (27); an end of the push rod (261) away from the slide rod (27) is slidably connected to an I-shaped slider (262) via 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 mounted on a side of the I-shaped slider (262) away from the push rod (261) via 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) abutting against the inner wall of the lower ring block (23) is fixedly connected to a side of the tripod (263) away from the I-shaped slider (262).

7. A mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 6, characterized in that: A balancing member (4) is provided between adjacent surfaces of a pair of I-shaped sliders (262), the balancing member (4) comprising a return spring (41), the outer end of the return spring (41) being fixedly connected to a balancing frame (42), the balancing frame (42) being provided with two symmetrically distributed around the return spring (41), the interior of the balancing frame (42) being rotatably connected to a balancing rod (43), and the end of the balancing rod (43) away from the balancing frame (42) being slidably connected to a rotating rod (44) that rotates with the interior of the I-shaped slider (262).

8. The mold processing high-speed machine tool equipped with an adaptive preload force spindle structure according to claim 7, characterized in that: The rotating rod (44) is magnetically connected to the adjacent ends of the balancing rod (43).

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