Multi-station vertical numerical control reaming and honing machine and high-precision hole machining method

Abstract

The present application relates to hinge lapping machine related technical field, specifically a kind of multi-station vertical numerical control hinge lapping machine and high-precision hole processing method, including cabinet, further comprising: rotary table is rotationally arranged in cabinet, multiple mechanical cradle floating tooling for loading workpiece are equidistantly arranged on rotary table along circumference, form multiple processing stations, and the top of rotary table is equipped with lifting platform, the bottom of lifting platform is equipped with multiple cutters distributed equidistantly along circumference;Mechanical cradle floating tooling is divided into two stages of processing before and after execution action, in the first stage, elastic mechanism is in locked state, in the second stage, trigger mechanism can release the locked state of elastic mechanism, so that two clamping pieces are elastically clamped to cutter, mechanical cradle floating tooling itself can already adapt to the slight change of workpiece surface, the introduction of elastic clamping further enhances this adaptability, to significantly improve processing precision.

Description

Technical Field

[0001] This invention relates to the technical field of honing machines, specifically a multi-station vertical CNC honing machine and a high-precision hole machining method. Background Technology

[0002] A multi-station vertical CNC honing machine is a precision device specifically designed for machining holes. Through the high-speed rotation and downward feed of the cutting tool, it efficiently machines holes in workpieces, ensuring dimensional accuracy and surface quality. In actual operation, the rotation and downward feed of the cutting tool are its core actions; this motion allows for precise machining of workpiece holes.

[0003] In the honing process, mechanical cradle floating fixtures are often used. These fixtures have unique floating characteristics and can automatically adjust their position according to the shape of the workpiece and processing requirements, thereby better adapting to the processing needs of the workpiece and improving the flexibility and adaptability of the processing. Their floating function enables the fixture to automatically compensate for the positional deviation of the workpiece during the processing, ensuring that the contact between the tool and the workpiece is more stable and uniform.

[0004] However, due to the length of the cutting tool, it is prone to "micro-wobbling" when feeding downwards and contacting the workpiece surface. This phenomenon causes the chisel edge of the drill bit to contact the workpiece first, which may cause the hole to "deviate" and lead to the inlet guide section being skewed. The machining error of the entire subsequent depth will be amplified. To address this, some honing machines add corresponding mechanisms to clamp the end of the cutting tool to reduce tool wobbling. However, this single clamping method may limit the floating function of the mechanical cradle floating fixture, preventing it from fully utilizing its adaptability. This will not only reduce machining efficiency but may also affect machining reliability, thus adversely affecting the entire machining process. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-station vertical CNC honing machine and a high-precision hole machining method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-station vertical CNC honing machine includes a cabinet and also includes:

[0008] Rotate the turntable inside the cabinet. Multiple mechanical cradle floating fixtures for loading workpieces are equidistantly arranged along the circumference of the turntable, forming multiple processing stations. A lifting platform is provided above the turntable, and multiple cutting tools are equidistantly distributed along the circumference at the bottom of the lifting platform.

[0009] The multiple sets of switching clamping tools arranged on the rotary table are distributed equidistantly along the circumference and are located at the side of the mechanical cradle floating tool, the switching clamping tool comprises two movable seats movably arranged on the rotary table, a set of elastic mechanisms are connected with clamping pieces for clamping the drill bit on the two movable seats respectively, and an arc-shaped notch is arranged on the side of the clamping piece;

[0010] Wherein, the two movable seats can move away from or close to each other, when they close to each other, the two clamping pieces are combined, and a through opening suitable for the cutter is formed between the two clamping pieces, during machining, the mechanical cradle floating tool is in the first stage and the second stage before and after action respectively, in the first stage, the elastic mechanism is in the locked state, and the two clamping pieces limit the cutter, in the second stage, the trigger mechanism arranged on the rotary table can release the locked state of the elastic mechanism, so that the two clamping pieces elastically clamp the cutter.

[0011] The multi-station vertical numerical control hinge honing machine as described above: the elastic mechanism comprises a sleeve fixed on the movable seat and a telescopic rod slidingly sleeved with the sleeve, the inside of the sleeve is provided with an elastic piece, one end of the telescopic rod is fixedly connected with the clamping piece, and the other end is matched with the trigger mechanism.

[0012] The multi-station vertical numerical control hinge honing machine as described above: the elastic piece comprises a first cylindrical spring arranged inside the sleeve and sleeved on the outer periphery of the telescopic rod, one end of the first cylindrical spring is connected with the inner wall of the sleeve, and the other end is connected with a circular table fixedly arranged on the telescopic rod.

[0013] The multi-station vertical numerical control hinge honing machine as described above: the circular table is slidingly connected with the inner wall of the sleeve, and a plurality of strip-shaped protrusions are formed on the outer wall of the circular table, and a plurality of strip-shaped grooves matched with the strip-shaped protrusions are arranged on the inner wall of the sleeve.

[0014] The multi-station vertical numerical control hinge honing machine as described above: the movable seat is provided with a guide groove, the trigger mechanism comprises a first sliding block slidingly embedded in the guide groove, and the first sliding block is provided with a matched structure at one end away from the clamping piece;

[0015] Wherein, the rotary table is fixed with a support, the two movable seats are movably arranged on the support and can move close to or away from each other along the length direction of the support, and the first sliding block is connected with a driven assembly arranged on the support.

[0016] As described above, the multi-station vertical CNC honing machine includes a first locking member fixedly connected to the first slider and a second locking member fixed to the end of the telescopic rod away from the clamping member. The second locking member has a locking groove on the side facing the first locking member. The cross-section of the locking groove is rectangular. The cross-section of the first locking member is trapezoidal. The side of the first locking member facing the movable seat has a connected inclined surface and a flat surface.

[0017] As described above, the multi-station vertical CNC honing machine includes a horizontal arm movably disposed on the side of the support, and the horizontal arm is connected to the support through two sets of support structures.

[0018] The cross arm has two second sliders that slide symmetrically on it, and the first slider is fixedly connected to the second slider via a connecting arm.

[0019] The multi-station vertical CNC honing machine described above: the support structure includes an L-shaped arm fixed to the side of the support, a guide column fixed to the L-shaped arm, and a second columnar spring sleeved on the outer periphery of the guide column. A movable block is also slidably provided on the guide column, and the two ends of the second columnar spring are respectively connected to the movable block and the L-shaped arm.

[0020] The movable block is fixedly connected to the horizontal arm, and a rolling engagement structure is provided between the horizontal arm and the lifting platform.

[0021] As described above, the multi-station vertical CNC honing machine includes a driven plate fixed to the horizontal arm, the side of the driven plate is provided with an inclined surface, and multiple vertical arms are fixed on the lifting platform and distributed equidistantly along the circumference. The end of the vertical arm away from the lifting platform is provided with a roller that cooperates with the inclined surface.

[0022] A method for machining high-precision holes using the aforementioned multi-station vertical CNC honing machine.

[0023] During processing, the workpiece to be processed is assembled into the mechanical cradle floating fixture. The turntable rotates intermittently and the tool reciprocates in the vertical direction. During the downward feed of the tool, in the first stage, the elastic mechanism is in a locked state, and the two clamping parts limit the tool. In the second stage, the triggering mechanism releases the locked state of the elastic mechanism, so that the two clamping parts elastically clamp the tool.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The present invention provides a clamping member on each side of the mechanical cradle floating fixture, and the two clamping members have arc-shaped notches on their sides. The mechanical cradle floating fixture performs two processing stages before and after the operation.

[0026] In the first stage, the elastic mechanism is locked, preventing the clamping parts from moving horizontally. Thus, the two clamping parts can form a passage for the tool to pass through through the arc-shaped notch. The two clamping parts effectively limit the tool, preventing the tool from "micro-shaking" when it feeds downward and contacts the workpiece surface, which would cause the hole to "deviate" and prevent the machining error of the entire depth from being amplified.

[0027] In the second stage, the triggering mechanism can release the locking state of the elastic mechanism, allowing the two clamping parts to elastically clamp the tool. Thus, the mechanical cradle floating fixture itself can adapt to minor changes in the workpiece surface, and the introduction of elastic clamping further enhances this adaptability, thereby significantly improving machining accuracy. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of one embodiment of a multi-station vertical CNC honing machine.

[0029] Figure 2 This is a schematic diagram of the internal structure of the cabinet in one embodiment of a multi-station vertical CNC honing machine.

[0030] Figure 3 This is a front view of one embodiment of a multi-station vertical CNC honing machine.

[0031] Figure 4 This is a schematic diagram showing the distribution of multiple sets of switchable clamping fixtures on a turntable in one embodiment of a multi-station vertical CNC honing machine.

[0032] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0033] Figure 6 This is a schematic diagram of the switching clamping fixture in one embodiment of a multi-station vertical CNC honing machine.

[0034] Figure 7 This is a schematic diagram of another angle of the switching clamping fixture in one embodiment of a multi-station vertical CNC honing machine.

[0035] Figure 8 This is an exploded view of the switching clamping fixture in one embodiment of a multi-station vertical CNC honing machine.

[0036] Figure 9 for Figure 8 A structural diagram from another angle.

[0037] Figure 10 This is an exploded view of the elastic mechanism in one embodiment of a multi-station vertical CNC honing machine.

[0038] In the diagram: 1. Cabinet; 2. Turntable; 3. Nozzle; 4. Lifting platform; 5. Cutting tool; 6. Vertical arm; 7. Floating fixture for mechanical cradle; 8. Movable seat; 801. Guide groove; 9. First slider; 901. Connecting arm; 10. Horizontal arm; 1001. Second slider; 11. Driven plate; 12. Support; 13. L-shaped arm; 14. Guide column; 15. First cylindrical spring; 16. First locking element; 17. Sleeve; 1701. Strip groove; 18. Telescopic rod; 1801. Frustum; 1802. Strip protrusion; 19. Second cylindrical spring; 20. Clamping element; 2001. Arc-shaped notch; 21. Second locking element; 2101. Locking groove; 22. Movable block. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0041] Please see Figures 1-10 In this embodiment, a multi-station vertical CNC honing machine includes a cabinet 1, and further includes:

[0042] Rotate the turntable 2 located inside the cabinet 1. Multiple mechanical cradle floating fixtures 7 for loading workpieces are equidistantly arranged along the circumference of the turntable 2, forming multiple processing stations. A lifting platform 4 is provided above the turntable 2, and multiple cutting tools 5 are equidistantly distributed along the circumference at the bottom of the lifting platform 4.

[0043] Multiple sets of switchable clamping fixtures are provided on the turntable 2, distributed equidistantly along the circumference and located on the side of the mechanical cradle floating fixture 7. The switchable clamping fixtures include two movable seats 8 movably provided on the turntable 2. Each of the two movable seats 8 is connected to a clamping member 20 for clamping the drill bit through a set of elastic mechanisms. The side of the clamping member 20 is provided with an arc-shaped notch 2001.

[0044] Among them, the two movable seats 8 can move away from or close to each other. When they are close to each other, the two clamping members 20 are engaged, and a through-hole that is compatible with the tool 5 is formed between the two clamping members 20. During processing, the mechanical cradle floating fixture 7 moves in the first stage and the second stage respectively. In the first stage, the elastic mechanism is in the locked state, and the two clamping members 20 limit the tool 5. In the second stage, the triggering mechanism provided on the turntable 2 can release the locked state of the elastic mechanism, so that the two clamping members 20 elastically clamp the tool 5.

[0045] In this embodiment, it should be further explained that a plurality of nozzles 3 are also provided inside the cabinet 1. The plurality of nozzles 3 are arranged at equal intervals along the circumference and are used to spray coolant onto the opening of the workpiece during processing to meet the processing requirements.

[0046] Secondly, during the processing, the lifting platform 4 performs a lifting action, which can drive the tool 5 to rise and fall. The reciprocating motion of the lifting platform 4 is driven by a servo motor and a precision ball screw, thereby ensuring processing accuracy.

[0047] In addition, during the processing, the mechanical cradle floating fixture 7 plays a fully floating role, and the tool 5 processes with the inner hole as the center, so as not to change the coaxiality of the part. Even if the part has dimensional errors, the fixture will eliminate the errors.

[0048] Furthermore, the present invention provides a clamping member 20 on each side of the mechanical cradle floating fixture 7, and the sides of the two clamping members 20 are provided with arc-shaped recesses 2001. The mechanical cradle floating fixture 7 is divided into two processing stages before and after the operation.

[0049] Specifically, in the first stage, the elastic mechanism is in a locked state, so that the clamping member 20 cannot move in the horizontal direction. Thus, the two clamping members 20 can form a passage for the tool 5 to pass through through the arc-shaped notch 2001. The two clamping members 20 effectively limit the tool 5, preventing the tool 5 from "micro-shaking" when it feeds downward and contacts the workpiece surface, which would lead to the hole "deviation" and prevent the machining error of the entire depth from being amplified.

[0050] In the second stage, the triggering mechanism can release the locking state of the elastic mechanism, so that the two clamping parts 20 can elastically clamp the tool 5. Thus, the mechanical cradle floating fixture 7 itself can adapt to the slight changes on the workpiece surface. The introduction of elastic clamping further enhances this adaptability, thereby significantly improving the machining accuracy.

[0051] As a further embodiment of the present invention, please refer again. Figure 10The elastic mechanism includes a sleeve 17 fixed to the movable seat 8 and a telescopic rod 18 slidably fitted with the sleeve 17. An elastic element is provided inside the sleeve 17. One end of the telescopic rod 18 is fixedly connected to the clamping member 20, and the other end cooperates with the triggering mechanism. The elastic element includes a first cylindrical spring 15 disposed inside the sleeve 17 and fitted around the outer periphery of the telescopic rod 18. One end of the first cylindrical spring 15 is connected to the inner wall of the sleeve 17, and the other end is connected to a frustum 1801 fixed to the telescopic rod 18. The frustum 1801 is slidably connected to the inner wall of the sleeve 17, and multiple strip-shaped protrusions 1802 are formed on the outer wall of the frustum 1801. Multiple strip-shaped grooves 1701 adapted to the strip-shaped protrusions 1802 are provided on the inner wall of the sleeve 17.

[0052] In this embodiment, the strip-shaped protrusion 1802 and the strip-shaped groove 1701 effectively guide the movement of the telescopic rod 18 and the clamping member 20. In the second stage of processing, the triggering mechanism disengages from the end of the telescopic rod 18 away from the clamping member 20. Thus, when the tool 5 swings, the clamping member 20 drives the telescopic rod 18 to reciprocate along the axial direction of the sleeve 17. The first columnar spring 15 provides support, realizing the elastic clamping of the tool 5 by the two clamping members 20. On the basis of setting the mechanical cradle floating fixture 7, the processing adaptability is further enhanced, thereby significantly improving the processing accuracy.

[0053] As a further embodiment of the present invention, please refer again. Figures 6-9 The movable seat 8 is provided with a guide groove 801. The triggering mechanism includes a first slider 9 that is slidably fitted in the guide groove 801. The first slider 9 and the end of the telescopic rod 18 away from the clamping member 20 are provided with an adapter structure. The turntable 2 is fixed with a support 12. The two movable seats 8 are movably disposed on the support 12 and can move closer or further away from each other along the length direction of the support 12. The first slider 9 is connected to the driven component disposed on the support 12.

[0054] As a further embodiment of the present invention, please refer again. Figure 10 The adapter structure includes a first locking member 16 fixedly connected to the first slider 9 and a second locking member 21 fixed to the end of the telescopic rod 18 away from the clamping member 20. The second locking member 21 has a locking groove 2101 on the side facing the first locking member 16. The cross-section of the locking groove 2101 is rectangular. The cross-section of the first locking member 16 is trapezoidal. The first locking member 16 has a connected inclined surface and a flat surface on the side facing the movable seat 8.

[0055] In this embodiment, it should be added that a linear drive module is provided on the support 12, that is, a servo motor and a bidirectional lead screw are used to drive the two movable seats 8 to move closer or further apart.

[0056] With attachment Figure 7 Taking the state shown as an example, at this time, the first locking member 16 is located in the locking groove 2101, and the flat surface on the first locking member 16 abuts against the inner wall of the locking groove 2101. Thus, the first locking member 16 can lock the telescopic rod 18 and the clamping member 20 through the second locking member 21. When the tool 5 approaches the workpiece, the two movable seats 8 approach each other until the two clamping members 20 are engaged. In the first stage of processing, the tool 5 is effectively limited.

[0057] When the driven component moves, it can drive the first slider 9 to slide in the guide groove 801. The first slider 9 drives the first locking member 16 to be pulled out from the locking groove 2101. Then, the locking state of the telescopic rod 18 and the clamping member 20 is released. Subsequently, the mechanical cradle floating fixture 7 moves. By switching the state of the two clamping members 20, the adaptability of processing is further enhanced, thereby significantly improving the processing accuracy.

[0058] After machining is completed, during the tool retraction process (i.e., the lifting platform 4 drives the tool 5 to rise and reset), the driven component moves in the opposite direction, driving the first slider 9 to slide and reset in the guide groove 801. Correspondingly, the first slider 9 drives the first locking member 16 to move toward the second locking member 21. At this time, even if the tool 5 causes slight movement of the clamping member 20, the telescopic rod 18 and the second locking member 21, the inclined surface on the first locking member 16 can compensate for this slight movement, ensuring that the first locking member 16 can be smoothly reinserted into the locking groove 2101.

[0059] As a further embodiment of the present invention, please refer again. Figure 3 , Figure 7 as well as Figure 8 The driven component includes a horizontal arm 10 movably disposed on the side of the support 12. The horizontal arm 10 is connected to the support 12 through two sets of support structures. Two second sliders 1001 are symmetrically slidably disposed on the horizontal arm 10. The first slider 9 is fixedly connected to the second slider 1001 through a connecting arm 901.

[0060] In this embodiment, when the two movable seats 8 approach each other, the first slider 9 will drive the second slider 1001 to slide on the cross arm 10 through the connecting arm 901, and the two second sliders 1001 will slide closer to each other.

[0061] The support structure includes an L-shaped arm 13 fixed to the side of the support 12, a guide post 14 fixed to the L-shaped arm 13, and a second cylindrical spring 19 sleeved on the outer periphery of the guide post 14. A movable block 22 is slidably mounted on the guide post 14. The two ends of the second cylindrical spring 19 are respectively connected to the movable block 22 and the L-shaped arm 13. The movable block 22 is fixedly connected to the horizontal arm 10, and a rolling engagement structure is provided between the horizontal arm 10 and the lifting platform 4. The rolling engagement structure includes a driven plate 11 fixed to the horizontal arm 10. The side of the driven plate 11 has an inclined surface. Multiple vertical arms 6 are fixed on the lifting platform 4 and are equidistantly distributed along the circumference. The end of each vertical arm 6 away from the lifting platform 4 has a roller that engages with the inclined surface.

[0062] In this embodiment, during processing, the lifting platform 4 drives the tool 5 to move downward for feeding. After the first stage is completed, the roller will act on the inclined surface of the side of the driven plate 11, thereby causing the driven plate 11 to give way. That is, the horizontal arm 10 drives the movable block 22 to slide away from the support 12 on the guide post 14. The second columnar spring 19 is compressed. The horizontal arm 10 drives the first slider 9 to slide in the guide groove 801 through the second slider 1001 and the connecting arm 901, so that the first locking member 16 is pulled out from the locking groove 2101, thereby changing the clamping state of the clamping member 20 on the tool 5. Based on the mechanical cradle floating fixture 7, the processing adaptability is further enhanced.

[0063] A method for machining high-precision holes using the multi-station vertical CNC honing machine, wherein during machining, the workpiece to be machined is assembled into the mechanical cradle floating fixture 7, the turntable 2 rotates intermittently and the tool 5 reciprocates in the vertical direction, during the downward feeding process of the tool 5, in the first stage, the elastic mechanism is in a locked state and the two clamping members 20 limit the tool 5, in the second stage, the triggering mechanism releases the locked state of the elastic mechanism, so that the two clamping members 20 elastically clamp the tool 5.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-station vertical CNC honing machine, comprising a cabinet; characterized in that, It also includes a turntable rotatably mounted inside the cabinet, on which multiple mechanical cradle floating fixtures for loading workpieces are equidistantly arranged along the circumference to form multiple processing stations. A lifting platform is provided above the turntable, and multiple cutting tools are equidistantly distributed along the circumference at the bottom of the lifting platform. Multiple sets of switchable clamping fixtures are provided on the turntable, equidistantly distributed along the circumference and located on the side of the mechanical cradle floating fixtures. The switchable clamping fixtures include two movable seats movably mounted on the turntable. Each of the two movable seats is connected to a clamping member for clamping the cutting tool through a set of elastic mechanisms. The side of the clamping member is provided with an arc-shaped notch. Among them, the two movable seats can move away from or close to each other. When they are close to each other, the two clamping parts are engaged, and a passage adapted to the tool is formed between the two clamping parts. During processing, the mechanical cradle floating fixture moves in two stages before and after the first stage. In the first stage, the elastic mechanism is in a locked state, and the two clamping parts limit the tool. In the second stage, the triggering mechanism on the turntable can release the locked state of the elastic mechanism, so that the two clamping parts can elastically clamp the tool. The elastic mechanism includes a sleeve fixed to the movable seat and a telescopic rod that slides with the sleeve. The sleeve is provided with an elastic element inside. One end of the telescopic rod is fixedly connected to the clamping member, and the other end cooperates with the triggering mechanism. The movable seat is provided with a guide groove, and the triggering mechanism includes a first slider that is slidably fitted in the guide groove. The first slider and the end of the telescopic rod away from the clamping member are provided with an adapter structure. A support is fixed on the turntable, and two movable seats are movably mounted on the support and can move closer or further apart along the length of the support. The first slider is connected to a driven component mounted on the support. The adapter structure includes a first locking member fixedly connected to the first slider and a second locking member fixed to the end of the telescopic rod away from the clamping member. The second locking member has a locking groove on the side facing the first locking member, and the cross-section of the locking groove is rectangular. The cross-section of the first locking member is trapezoidal, and the side of the first locking member facing the movable seat has a connected inclined surface and a flat surface. The driven component includes a horizontal arm movably disposed on the side of the support, and the horizontal arm is connected to the support through two sets of support structures; Two second sliders are symmetrically slidable on the cross arm, and the first slider is fixedly connected to the second slider through a connecting arm; The support structure includes an L-shaped arm fixed to the side of the support, a guide post fixed to the L-shaped arm, and a second columnar spring sleeved on the outer periphery of the guide post. A movable block is also slidably provided on the guide post, and the two ends of the second columnar spring are respectively connected to the movable block and the L-shaped arm. The movable block is fixedly connected to the horizontal arm, and a rolling engagement structure is provided between the horizontal arm and the lifting platform.

2. The multi-station vertical CNC honing machine according to claim 1, characterized in that, The elastic element includes a first cylindrical spring disposed inside the sleeve and sleeved on the outer periphery of the telescopic rod. One end of the first cylindrical spring is connected to the inner wall of the sleeve, and the other end is connected to a frustum fixed on the telescopic rod.

3. A multi-station vertical CNC honing machine according to claim 2, characterized in that, The frustum is slidably connected to the inner wall of the sleeve, and multiple strip-shaped protrusions are formed on the outer wall of the frustum, while multiple strip-shaped grooves that match the strip-shaped protrusions are provided on the inner wall of the sleeve.

4. A multi-station vertical CNC honing machine according to claim 3, characterized in that, The rolling engagement structure includes a driven plate fixed to the cross arm, the side of the driven plate is provided with an inclined surface, and a plurality of vertical arms are fixed on the lifting platform and distributed at equal intervals along the circumference. The end of the vertical arm away from the lifting platform is provided with a roller that engages with the inclined surface.

5. A method for machining high-precision holes using a multi-station vertical CNC honing machine as described in any one of claims 1-4, characterized in that: During processing, the workpiece to be processed is assembled into the mechanical cradle floating fixture. The turntable rotates intermittently and the tool reciprocates in the vertical direction. During the downward feed of the tool, in the first stage, the elastic mechanism is in a locked state, and the two clamping parts limit the tool. In the second stage, the triggering mechanism releases the locked state of the elastic mechanism, so that the two clamping parts elastically clamp the tool.

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