Machine tool for changing tool by utilizing sensor to perform bidirectional precise positioning on moving part

Abstract

According to the machine tool, two metal sensors which are spaced left and right are arranged on a main shaft fixing seat, and a two-way position detection structure is formed in cooperation with a metal block on a cross beam; real-time two-way positioning feedback can be carried out on the left-right reciprocating motion of the main shaft driven by the X-axis sliding table module, and one-way detection deviation of a single sensor is avoided; meanwhile, the matching precision of the sensor and the metal block is high, the infinitesimal displacement of the moving part can be accurately captured, the alignment error of the main shaft and the disc tool magazine tool during tool changing is controlled within an extremely small range, the tool changing precision is remarkably improved, the consistency of the machining size of a workpiece is guaranteed, and the rejection rate caused by positioning deviation is reduced.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, and in particular to a machine tool that uses sensors to perform bidirectional precision positioning of moving parts for tool changing. Background Technology

[0002] In the field of machining, machine tools, as core processing equipment, directly determine the workpiece processing quality and production efficiency through their tool changing accuracy and efficiency. This is especially true in precision parts machining scenarios, where the positioning accuracy requirements for moving parts are even more stringent. Currently, most machine tool tool changing mechanisms on the market rely primarily on traditional mechanical limit switches or single sensors for positioning during operation.

[0003] When the moving parts of traditional machine tools such as the X-axis, Y-axis, and Z-axis reciprocate, the mechanical limiters are prone to positioning deviations due to long-term wear. A single sensor can only achieve unidirectional position detection and cannot perform real-time calibration of the bidirectional motion trajectory of the moving parts. This can lead to misalignment between the spindle and the tool magazine during tool changes, which not only affects the machining accuracy of the workpiece but may also cause safety accidents such as tool collisions and spindle damage. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a machine tool that uses sensors to perform bidirectional precision positioning of moving parts for tool changing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A machine tool for tool changing using bidirectional precision positioning of moving parts by sensors includes a base, a gantry frame on the rear side of the base end face, a cradle-type worktable on the front side, a Z-axis slide module arranged vertically on the gantry frame, a crossbeam on the Z-axis slide module, an X-axis slide module arranged horizontally on the crossbeam, a spindle mount on the X-axis slide module, a Y-axis sliding module arranged front-back on the spindle mount, a spindle box on the Y-axis sliding module, a disc tool magazine mechanism at the upper end of the gantry frame, two metal sensors spaced lateral to each other on the spindle mount, and a metal block cooperating with the two metal sensors on the crossbeam.

[0006] In some embodiments, the disc tool magazine mechanism includes a tool disc fixing seat located at the upper end of the gantry frame, a first motor located at the rear side of the tool disc fixing seat, the output shaft of the first motor being connected to a tool disc rotating shaft, the axial direction of the tool disc rotating shaft being arranged in the front-back direction and connected to a disc tool magazine, and a plurality of clamping claws for clamping tool sleeves being evenly arranged along the circumference of the disc tool magazine.

[0007] In some embodiments, a spacing adjustment component for adjusting the left-right spacing between the two metal sensors is also provided on the spindle mounting base.

[0008] In some embodiments, the spacing adjustment assembly includes a support plate disposed at the lower end of the spindle fixing seat, a support seat disposed on the support plate, and sliding grooves disposed on both the left and right sides of the support seat. An adjustment seat slides left and right in each of the sliding grooves, and two metal sensors are respectively disposed on the two adjustment seats.

[0009] In some embodiments, each of the adjusting seats is fixed to the support seat by a first bolt, and a second bolt is threaded to both ends of the support seat, with the threaded end of the second bolt abutting against the adjusting seat.

[0010] In some embodiments, a storage area is formed on the base and within the gantry frame, and a working area is formed on the base and at the front of the gantry frame. The cradle-type workbench includes a first cradle seat, a second cradle seat, a cradle, and a rotating workbench. A connecting seat is connected between the first cradle seat and the second cradle seat. A linear module is provided on the base along the front-back direction. The connecting seat is connected to the linear module and can drive the cradle-type workbench to move between the storage area and the working area through the linear module. A first slide rail is spaced lateral to lateral on the base. The lower ends of the first cradle seat and the second cradle seat are each provided with a first slider that slides on the first slide rail.

[0011] In some embodiments, the linear module includes at least a second motor, a lead screw, and a lead screw sleeve. The lead screw sleeve is connected to the connecting seat, and an inverted V-shaped protective cover is provided on the base and at the upper end of the lead screw.

[0012] In some embodiments, a second track is provided on the base and on both the left and right sides of the gantry frame, with a second slider slidably disposed on each of the two second tracks. A plate is hinged to each of the second sliders, and the plate can be flipped to a vertical or horizontal position. When the plate is in a vertical position, it can move to the outside of the cradle-type workbench or the gantry frame. When the cradle-type workbench moves to the storage area, the plate can be flipped horizontally onto the work area.

[0013] In some embodiments, a hinge seat is provided on the second slider, a first rotating shaft is provided on one side of the plate, the first rotating shaft is rotatably mounted on the hinge seat, a first gear is provided on the first rotating shaft, and a third motor is also provided on the second slider, and a second gear that can mesh with the first gear is provided on the output shaft of the third motor.

[0014] In some embodiments, the plate body includes a lower plate body and an upper plate body. The first rotating shaft is disposed on the lower plate body, and a second rotating shaft is disposed on the rear side of the upper plate body. The second rotating shaft is rotatably mounted on the rear side of the lower plate body. A fixed shaft coaxially disposed with the first rotating shaft is disposed on the second slider. A first bevel gear is disposed on the fixed shaft, and a second bevel gear meshing with the first bevel gear is disposed on the second rotating shaft. When the lower plate body is horizontally supported in the working area, the upper plate body is vertically disposed and closes and blocks the front side of the storage area.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This structure features two spaced metal sensors on the spindle mount, which, together with a metal block on the crossbeam, form a bidirectional position detection structure. This allows for real-time bidirectional positioning feedback of the spindle's reciprocating motion driven by the X-axis slide module, avoiding the unidirectional detection bias of a single sensor. Simultaneously, the high precision of the sensor-metal block combination enables accurate capture of minute displacements of moving parts, minimizing the alignment error between the spindle and the disc tool magazine during tool changes. This significantly improves tool changing accuracy, ensuring consistent workpiece dimensions and reducing scrap rates caused by positioning deviations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the cradle-type worktable of the present invention located in the work area.

[0017] Figure 2 For the present invention Figure 2 A magnified structural diagram at point A.

[0018] Figure 3 This is a side view of the cradle-type worktable of the present invention when it is located in the work area.

[0019] Figure 4 This is a rear view schematic diagram of the cradle-type worktable of the present invention when it is located in the work area.

[0020] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B.

[0021] Figure 6 This is a three-dimensional schematic diagram of the plate body of the present invention located on both sides of the cradle-type workbench.

[0022] Figure 7 This is a three-dimensional schematic diagram of the plate body of the present invention when it is horizontally positioned in the working area. Detailed Implementation

[0023] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0024] like Figures 1-7 The machine tool shown, which uses sensors for bidirectional precision positioning of moving parts for tool changing, includes a base 1, a gantry frame 2 on the rear side of the end face of the base 1, a cradle-type worktable 9 on the front side, a Z-axis slide module 3 arranged vertically on the gantry frame 2, a crossbeam 4 on the Z-axis slide module 3, an X-axis slide module 5 arranged horizontally on the crossbeam 4, a spindle mounting base 6 on the X-axis slide module 5, a Y-axis sliding module arranged front-backly on the spindle mounting base 6, a spindle box 8 on the Y-axis sliding module, a disc tool magazine mechanism 10 at the upper end of the gantry frame 2, two metal sensors 11 spaced horizontally on the spindle mounting base 6, and metal blocks 12 that cooperate with the two metal sensors 11 on the crossbeam 4.

[0025] According to the above structure, when the tool change command is executed, the Z-axis slide module 3 drives the crossbeam 4 to move vertically, adjusting the vertical height of the spindle box 8 to reserve sufficient space for tool change and avoid interference with the worktable or workpiece; the X-axis slide module 5 drives the spindle mounting base 6 to move horizontally along the crossbeam 4. During this process, two metal sensors 11 spaced apart on the left and right sides of the spindle mounting base 6 scan the metal block 12 on the crossbeam 4 in real time. Only when the sensors on both sides detect the metal block 12 simultaneously is the X-axis position of the spindle determined to be accurate, thereby achieving bidirectional precise positioning in the X-axis direction and ensuring that the spindle is aligned with the tool pick-up and drop-off position of the disc tool magazine mechanism 10 in the left and right directions. After the spindle reaches the tool change position through multi-axis movement and bidirectional positioning, the disc tool magazine mechanism 10 is activated, rotating the target tool to the tool pick-up position. The tool clamping mechanism of the spindle releases the current tool and clamps the target tool at the same time, completing the tool change.

[0026] Therefore, this structure has two metal sensors 11 spaced apart on the spindle mounting base, which, together with the metal block 12 on the crossbeam 4, form a bidirectional position detection structure. This structure can provide real-time bidirectional positioning feedback for the left and right reciprocating motion of the spindle driven by the X-axis slide module, avoiding the unidirectional detection deviation of a single sensor. At the same time, the high precision of the sensor and the metal block can accurately capture the minute displacement of the moving parts, so that the alignment error between the spindle and the disc tool magazine tool is controlled within a very small range during tool changing, significantly improving the tool changing accuracy, thereby ensuring the consistency of the workpiece machining dimensions and reducing the scrap rate caused by positioning deviation.

[0027] In this invention, the disc tool magazine mechanism 10 includes a tool magazine fixing seat 21 located at the upper end of the gantry frame 2. A first motor 22 is provided on the rear side of the tool magazine fixing seat 21. The output shaft of the first motor 22 is connected to a tool magazine rotating shaft 23. The axial direction of the tool magazine rotating shaft 23 is arranged in the front-back direction and is connected to a disc tool magazine 24. A plurality of clamping claws 25 for clamping tool sleeves are evenly arranged along the circumference of the disc tool magazine 24.

[0028] Different sized cutting tools are loaded into tool holders, and then the tool holders containing the tools are inserted one by one into the clamping claws 25 evenly distributed along the circumference of the disc tool magazine 24. The clamping claws 25, through their own elastic clamping structure or locking buckles, provide a stable clamping for the tool holders, preventing the tools from loosening or falling off during the rotation of the disc tool magazine 24.

[0029] It should be noted that the disc tool magazine mechanism 10 is a conventional design and the tool changing method is a conventional design and will not be described in detail.

[0030] See Figure 4 , Figure 5 As shown, a spacing adjustment component for adjusting the left and right spacing between the two metal sensors 11 is also provided on the main shaft fixing seat 6.

[0031] Furthermore, the spacing adjustment assembly includes a support plate 41 located at the lower end of the main shaft fixing seat 6, a support seat 42 is provided on the support plate 41, and sliding grooves 43 are provided on both the left and right sides of the support seat 42. Adjustment seats 44 slide left and right in each of the sliding grooves 43, and the two metal sensors 11 are respectively provided on the two adjustment seats 44.

[0032] Each of the adjustment seats 44 is fixed to the support seat 42 by a first bolt 51. A second bolt 52 is threaded to both the left and right ends of the support seat 42, and the threaded end of the second bolt 52 abuts against the adjustment seat 44.

[0033] During machine tool installation, debugging, or scene switching, the first step is to perform coarse adjustment and pre-fixation of the distance between the two sensors. Based on the effective detection length of the metal block 12 on the crossbeam 4 (e.g., 40mm), the target distance between the two metal sensors 11 is determined. The first bolt 51 on the adjusting seat 44 is loosened (at this time, the first bolt is not completely loosened, only the locking of the adjusting seat is released), and the adjusting seat 44 is pushed to slide left and right along the sliding grooves 43 on both sides of the support seat 42. Since the adjusting seat is fixedly connected to the sensor, the sensor moves synchronously with the adjusting seat until the distance between the two sensors is close to the target value (e.g., 40mm + 0.5mm). After initial alignment, the first bolt 51 is passed through the elongated through hole of the adjusting seat 44 and screwed into the corresponding threaded hole of the support seat 42 (not marked in the figure, conventional design). At this time, the bolt is not fully tightened, only serving a pre-fixing function to prevent the adjusting seat from sliding arbitrarily during subsequent fine-tuning, thus completing the coarse adjustment positioning. Using a wrench, rotate the second bolts 52 at both ends of the support base 42. Since the threaded end of the second bolt abuts against the adjusting seat 44, the bolt is pushed towards the adjusting seat until the gap is reduced to 40mm. During the process, the detection signals of the two sensors are monitored in real time by the machine tool control system to ensure that when the metal block moves to the target position, the two sensors can output signals simultaneously to confirm the accuracy of the gap. After the fine adjustment is completed, tighten the first bolt 51 thoroughly to firmly fix the adjusting seat in the slide groove 43.

[0034] Simultaneously, the second bolt is kept in a contacting position, forming a dual fixing structure with the first bolt as the main fixation and the second bolt as the auxiliary limit, preventing the adjusting seat from loosening during machine operation and completing the spacing adjustment. If the first bolt loosens slightly due to long-term machine operation, the contacting position of the second bolt can prevent the adjusting seat from shifting significantly, avoiding serious deviation in the spacing between the two sensors. If one of the sensors fails, the dual detection mechanism prohibits tool replacement. The operator can temporarily adjust the position of the other sensor for emergency detection by loosening the first bolt and adjusting the second bolt (non-routine operation, for emergency use only), while quickly replacing the faulty sensor to reduce downtime.

[0035] In this invention, a storage area 61 is formed on the base 1 and inside the gantry frame 2, and a working area 62 is formed on the base 1 and in front of the gantry frame 2. The cradle-type workbench 9 includes a first cradle seat 63, a second cradle seat 64, a cradle 65, and a rotating workbench 66. A connecting seat 67 is connected between the first cradle seat 63 and the second cradle seat 64. A linear module 68 is provided on the base 1 along the front-back direction. The connecting seat 67 is connected to the linear module 68 and can drive the cradle-type workbench 9 to move between the storage area 61 and the working area 62 through the linear module 68. A first slide rail 69 is spaced laterally on the base 1. The lower ends of the first cradle seat 63 and the second cradle seat 64 are each provided with a first slider 610 that slides on the first slide rail 69.

[0036] When the machine tool is not started or in a non-processing state, the cradle-type worktable is in the storage area, realizing the rational use of space.

[0037] Specifically, the control system defaults to driving the linear module 68 (set along the front-to-back direction of the base 1). The lead screw sleeve of the linear module (fixed to the connecting seat 67) drives the connecting seat to move backward along the module track. The connecting seat 67 connects the first cradle seat 63 and the second cradle seat 64. Its movement synchronously drives the entire cradle-type worktable (including the cradle 65 and the rotary worktable 66) to move backward. At the same time, the first slider 610 at the lower end of the first cradle seat 63 and the second cradle seat 64 slides along the first slide rail 69 on the base 1, providing stable guidance for the movement of the worktable. When the cradle-type worktable is completely inserted into the storage area 61 in the gantry frame 2 on the base 1, the linear module 68 stops running, and the worktable is in standby mode to avoid occupying the space of the work area 62 when not processing, and to reduce external interference.

[0038] When processing is required, the worktable moves from the storage area to the working area. The operator issues a "worktable transfer" command through the control system. The linear module 68 starts in reverse, driving the connecting seat 67 to move the cradle-type worktable forward. The first slider 610 slides forward synchronously along the first slide rail 69 to ensure the stability of the worktable's movement trajectory. When the worktable has completely moved to the working area 62 in front of the base 1, the linear module 68 stops and locks. At this time, the rotary worktable 66 is in a position easily accessible to the operator, making it convenient to clamp the workpiece to be processed onto the rotary worktable 66. After the workpiece is clamped, the cradle 65 can be tilted around the rotation axis of the first cradle seat 63 and the second cradle seat 64 (not marked in the figure, conventional design) according to processing requirements. The rotary worktable 66 can rotate around its own axis to achieve multi-position adjustment of the workpiece, preparing for subsequent processing.

[0039] Furthermore, the linear module 68 includes at least a second motor 71, a lead screw 72, and a lead screw sleeve. The lead screw sleeve is connected to the connecting seat 67, and an inverted V-shaped protective cover 74 is provided on the base 1 at the upper end of the lead screw 72.

[0040] The lead screw 72 and the lead screw sleeve (sleeved on the outside of the lead screw, with matching threads inside) form a threaded transmission pair. When the lead screw rotates, the lead screw sleeve moves linearly along the lead screw axis (front and back direction). Since the lead screw sleeve is fixedly connected to the connecting seat 67, the linear movement of the sleeve synchronously drives the connecting seat to move, thereby pulling the first cradle seat 63, the second cradle seat 64 and the entire cradle-type worktable to move.

[0041] During machine tool processing, impurities such as metal chips and cutting fluid are generated. The inverted V-shaped cover can completely cover the upper and side ends of the lead screw 72, preventing chips and cutting fluid from falling directly or splashing into the mating clearance between the lead screw and the lead screw sleeve, thus avoiding thread wear or transmission jamming caused by impurities. At the same time, the inverted V-shaped protective cover 74 is located between the cradle 65 and the connecting seat 67, so that the cradle-type worktable will not interfere with the inverted V-shaped protective cover 74 when it moves.

[0042] See Figure 1 , Figure 6 , Figure 7 As shown, a second track 81 is provided on the base 1 and on both the left and right sides of the gantry frame 2, with a front-to-back direction. A second slider 82 is slidably provided on each of the two second tracks 81. A plate 83 is hinged to each of the second sliders 82, which can be flipped left and right. The plate 83 can be flipped to a vertical or horizontal position. When the plate 83 is in a vertical position, it can move to the outside of the cradle-type workbench 9 or the gantry frame 2. When the cradle-type workbench 9 moves into the storage area 61, the plate 83 can be flipped horizontally onto the work area 62.

[0043] When the cradle-type worktable is in the working area, the plate provides protection in a vertical position. The second slider 82 moves along the second tracks 81 (set in the front-to-back direction) on both sides of the base 1. If it is necessary to protect the outside of the cradle-type worktable 9, after the worktable moves to the working area 62, the slider is moved to the corresponding position on the left and right sides of the worktable; the plate is located on the left and right sides of the worktable to prevent debris from splashing into the workshop passage or the operator from contacting the rotating parts during processing.

[0044] When the cradle-type workbench is moved back to the storage area, and it is necessary to expand the work area space or protect the storage area, the plate body switches to a horizontal form. The linear module 68 moves the cradle-type workbench 9 completely into the storage area 61 of the base 1, ensuring that the work area 62 is unobstructed. The second slider 82 is driven to move along the second track 81 towards the work area 62, so that the second sliders on the left and right sides are aligned with the left and right edges of the work area 62, ensuring that the plate body can completely cover the work area after being flipped horizontally. The vertical plate body 83 is flipped downwards, and through the hinge structure, it is rotated around the hinge axis to a horizontal form. At this time, the support seat on the base 1 supports the plate body 83, completely covering the upper space of the work area 62. The horizontal plate body can be used as a temporary workbench for placing workpieces, tools, or testing equipment. At the same time, after the plate body covers the work area, it can prevent dust and debris from falling into the workbench surface in the storage area 61, thus playing a dustproof protection role.

[0045] A hinge seat 91 is provided on the second slider 82, and a first rotating shaft 92 is provided on one side of the plate 83. The first rotating shaft 92 is rotatably mounted on the hinge seat 91. A first gear 93 is provided on the first rotating shaft 92. A third motor 94 is also provided on the second slider 82. A second gear 95 that can mesh with the first gear 93 is provided on the output shaft of the third motor 94.

[0046] When the plate needs to be flipped, the control system controls the third motor 94 to work, driving the second gear 95 to mesh with the first gear 93, thereby flipping the plate 83.

[0047] Furthermore, the plate body 83 includes a lower plate body 100 and an upper plate body 101. The first rotating shaft 92 is disposed on the lower plate body 100. A second rotating shaft 102 is disposed on the rear side of the upper plate body 101. The second rotating shaft 102 is rotatably mounted on the rear side of the lower plate body 100. A fixed shaft 103 coaxially disposed on the second slider 82 is disposed on the second slider 82. A first bevel gear 104 is disposed on the fixed shaft 103. A second bevel gear 105 meshing with the first bevel gear 104 is disposed on the second rotating shaft 102. When the lower plate body 100 is horizontally supported on the working area 62, the upper plate body 101 is vertically disposed and closes and blocks the front side of the storage area 61.

[0048] When the cradle-type workbench is moved back to the storage area, and it is necessary to close the storage area and expand the work area, the lower plate and the upper plate achieve coordinated form switching through bevel gear transmission.

[0049] The third motor 94 drives the lower plate 100 (fixed to the first rotating shaft 92) to rotate around the hinge seat 91 via gear transmission until the lower plate is horizontally supported above the working area 62. At this time, the third motor brakes, and the lower plate remains horizontal. During the rotation of the lower plate, the fixed shaft 103, coaxial with the first rotating shaft 92, is fixed in position (fixed to the second slider 82). The lower plate drives the second rotating shaft 102 (located behind the upper plate 101) to move synchronously, so that the second bevel gear 105 on the second rotating shaft 102 and the first bevel gear 104 on the fixed shaft 103 are engaged. When the lower plate is completely horizontal, the rotation of the lower plate around the first rotating shaft drives the second rotating shaft 102 to rotate around the fixed shaft 103. Through the meshing transmission of the first bevel gear 104 and the second bevel gear 105, the upper plate 101 rotates around the second rotating shaft 102 to a vertical state. At this time, the upper plate is vertically positioned above the lower plate 100. The rear side completely encloses and blocks the front side of the storage area 61, thus achieving a coordinated state where the lower panel covers the work area and the upper panel encloses the storage area.

[0050] When the lower plate is horizontal, it covers the work area, providing a temporary operating platform; the upper plate simultaneously and vertically closes the front of the storage area, preventing dust and debris from entering the storage area, avoiding the limitation of traditional plates that can only cover the work area, and increasing the protection range by more than 50%; the lower plate and the upper plate are linked by bevel gears, and the form switching is completed simultaneously without additional operation steps.

[0051] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool for tool changing by bidirectional precision positioning of moving parts using sensors, comprising a base (1), characterized in that: A gantry frame (2) is provided on the rear side of the end face of the base (1), and a cradle-type worktable (9) is provided on the front side. A Z-axis slide module (3) is provided on the gantry frame (2) in the vertical direction. A crossbeam (4) is provided on the Z-axis slide module (3). An X-axis slide module (5) is provided on the crossbeam (4) in the horizontal direction. A spindle fixing seat (6) is provided on the X-axis slide module (5). A Y-axis sliding module is provided on the spindle fixing seat (6) in the front-back direction. A spindle box (8) is provided on the Y-axis sliding module. A disc tool magazine mechanism (10) is provided at the upper end of the gantry frame (2). Two metal sensors (11) are spaced apart on the spindle fixing seat (6) in the left and right directions. A metal block (12) that cooperates with the two metal sensors (11) is provided on the crossbeam (4).

2. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 1, characterized in that: The disc tool magazine mechanism (10) includes a tool magazine fixing seat (21) located at the upper end of the gantry frame (2). A first motor (22) is provided on the rear side of the tool magazine fixing seat (21). The output shaft of the first motor (22) is connected to the tool magazine rotating shaft (23). The axial direction of the tool magazine rotating shaft (23) is arranged in the front-back direction and connected to the disc tool magazine (24). Several clamping claws (25) for clamping the tool sleeve are evenly arranged on the circumference of the disc tool magazine (24).

3. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 1, characterized in that: A spacing adjustment component for adjusting the left and right spacing between the two metal sensors (11) is also provided on the main shaft fixing seat (6).

4. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 3, characterized in that: The spacing adjustment assembly includes a support plate (41) located at the lower end of the main shaft fixing seat (6), a support seat (42) is provided on the support plate (41), and a sliding groove (43) is provided on both the left and right sides of the support seat (42). An adjustment seat (44) slides left and right in each of the sliding grooves (43), and two metal sensors (11) are respectively provided on the two adjustment seats (44).

5. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 4, characterized in that: Each of the adjustment seats (44) is fixed to the support seat (42) by a first bolt (51). A second bolt (52) is threaded to both the left and right ends of the support seat (42), and the threaded end of the second bolt (52) abuts against the adjustment seat (44).

6. The machine tool for tool changing using bidirectional precision positioning of a moving part by a sensor, as described in any one of claims 1-5, is characterized in that: A storage area (61) is formed on the base (1) and inside the gantry frame (2). A work area (62) is formed on the base (1) and in front of the gantry frame (2). The cradle-type workbench (9) includes a first cradle seat (63), a second cradle seat (64), a cradle (65), and a rotating workbench (66). A connecting seat (67) is connected between the first cradle seat (63) and the second cradle seat (64). A front-mounted edge is provided on the base (1). A linear module (68) is provided in the rear direction. The connecting seat (67) is connected to the linear module (68) and can drive the cradle-type workbench (9) to move between the storage area (61) and the work area (62) through the linear module (68). A first slide rail (69) is spaced on the left and right sides of the base (1). The lower ends of the first cradle seat (63) and the second cradle seat (64) are provided with a first slider (610) that slides on the first slide rail (69).

7. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 6, characterized in that: The linear module (68) includes at least a second motor (71), a lead screw (72) and a lead screw sleeve. The lead screw sleeve is connected to the connecting seat (67). An inverted V-shaped protective cover (74) is provided on the base (1) and at the upper end of the lead screw (72).

8. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 6, characterized in that: On the base (1) and on both sides of the gantry frame (2), there are second tracks (81) arranged in the front-to-back direction. On each of the two second tracks (81), there are second sliders (82) slidably arranged. On each of the second sliders (82), there are plates (83) hinged to each other. The plates (83) can be flipped to a vertical position or a horizontal position. When the plates (83) are in a vertical position, they can be moved to the outside of the cradle workbench (9) or the gantry frame (2). When the cradle workbench (9) is moved to the storage area (61), the plates (83) can be flipped horizontally onto the work area (62).

9. The machine tool for tool changing using bidirectional precision positioning of moving parts by sensors according to claim 8, characterized in that: A hinge seat (91) is provided on the second slider (82), and a first rotating shaft (92) is provided on one side of the plate (83). The first rotating shaft (92) is rotatably mounted on the hinge seat (91). A first gear (93) is provided on the first rotating shaft (92). A third motor (94) is also provided on the second slider (82). A second gear (95) that can mesh with the first gear (93) is provided on the output shaft of the third motor (94).

10. The machine tool for tool changing using bidirectional precision positioning of a moving part by a sensor according to claim 9, characterized in that: The plate (83) includes a lower plate (100) and an upper plate (101). The first rotating shaft (92) is disposed on the lower plate (100). A second rotating shaft (102) is disposed on the rear side of the upper plate (101). The second rotating shaft (102) is rotatably mounted on the rear side of the lower plate (100). A fixed shaft (103) is disposed on the second slider (82) and is coaxial with the first rotating shaft (92). A first bevel gear (104) is disposed on the fixed shaft (103). A second bevel gear (105) is disposed on the second rotating shaft (102) and meshes with the first bevel gear (104). When the lower plate (100) is horizontally supported on the working area (62), the upper plate (101) is vertically disposed and closes and blocks the front side of the storage area (61).

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