Horizontal balance adjusting device for numerical control machine tool

Abstract

The invention discloses a horizontal balance adjusting device for a numerical control machine tool, and relates to the field of numerical control machine tools, the technical scheme is that the horizontal balance adjusting device comprises a machine tool body, a combined truss and a moving assembly, the combined truss is slidably connected along the machine tool body and is connected with a machining assembly, and the moving assembly comprises a moving mechanism, a leveling mechanism and a follow-up mechanism; the moving mechanism is used for controlling the combined truss to move along the bed body, the leveling mechanism is used for connecting the follow-up mechanism and the moving mechanism, the moving mechanism is further used for driving the follow-up mechanism to move synchronously, and the follow-up mechanism is used for being connected with or separated from the leveling mechanism and used for controlling the leveling mechanism to adjust the levelness of the truss base body. The truss base body is further provided with a fine adjustment mechanism for conducting horizontal fine adjustment on the machining assembly through hydraulic pressure. The device has the advantages that adjustment with the high-precision requirement is responded in a matched adjustment mode combining mechanical coarse adjustment, locking and hydraulic fine adjustment, the adjustment accuracy is verified in cooperation with electric control, and the adjustment precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tools, and more specifically, to a horizontal balance adjustment device for a numerical control machine tool. Background Art

[0002] As the core equipment of high-end manufacturing, the machining accuracy of a numerical control machine tool directly affects the geometric tolerance and surface quality of workpieces, and the horizontal balance state of the machine tool is the basic condition for ensuring accuracy. If there is a horizontal deviation in the installation base surface of the machine tool, it will lead to problems such as straightness error of the guide rail and offset of the spindle axis, and then trigger a series of reactions such as tool path deviation and uneven distribution of cutting force.

[0003] In the prior art, the horizontal balance adjustment device mainly realizes leveling through mechanical, hydraulic or electro-mechanical linkage methods. However, in the scenario of high-precision (micrometer-level) numerical control machine tools, the traditional technology still has bottlenecks such as insufficient dynamic response, poor long-term stability, and low multi-point coordination efficiency, resulting in the machining accuracy being difficult to meet the strict requirements of precision parts (such as aeroengine blades, optical molds). Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a horizontal balance adjustment device for a numerical control machine tool, which has a combined adjustment method of mechanical coarse adjustment and locking and hydraulic fine adjustment to respond to the high-precision requirements, and cooperates with electric control to verify the adjustment accuracy and improve the adjustment precision.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A horizontal balance adjustment device for a numerical control machine tool, comprising:

[0007] A bed;

[0008] A combined truss, the combined truss includes a truss seat and a truss base body, the truss seat is slidably connected to the bed, and a machining assembly for machining workpieces is also slidably connected to the truss base body;

[0009] A moving assembly, including a moving mechanism, a leveling mechanism and a follow-up mechanism, the moving mechanism is used to connect with the truss seat and control the truss seat to move along the bed, the leveling mechanism is used to connect the follow-up mechanism and the moving mechanism, the moving mechanism is also used to drive the synchronous movement of the follow-up mechanism, the leveling mechanism is movably connected to the moving mechanism, and the follow-up mechanism is used to connect or disconnect from the leveling mechanism;

[0010] When the follow-up mechanism is connected to the leveling mechanism, it is used to drive the leveling mechanism to adjust the position in contact with the truss seat to adjust the level of the truss base body;

[0011] When the follow-up mechanism is separated from the leveling mechanism, it is used to drive the truss base to move along the bed, and the leveling mechanism maintains contact with the truss seat and remains relatively stationary;

[0012] A fine-tuning mechanism for horizontally fine-tuning the processing assembly by using hydraulic pressure is further provided on the truss base.

[0013] As a further improvement of the present invention, the moving mechanism includes a moving motor, a main shaft screw rod, and a screw rod sleeve. The moving motor is arranged at one end of the bed and is coaxially connected to the main shaft screw rod through a coupling, and the screw rod sleeve is connected to the main shaft screw rod;

[0014] A clamping plate is connected to the truss seat. The clamping plate forms a gap for installing the screw rod sleeve. A ball bearing is further arranged between the screw rod sleeve and the clamping plate. The clamping plate is used to limit the screw rod sleeve to maintain relative fixation with the truss seat.

[0015] As a further improvement of the present invention, the leveling mechanism includes a support sleeve and a lifting block. The support sleeve is coaxially arranged with the screw rod sleeve and is movably connected. The lifting block is coaxially and fixedly connected to the support sleeve. A groove is formed on one side of the truss seat for installing the screw rod sleeve. The side of the lifting block facing away from the support sleeve is arc-shaped and is used to abut against the groove. Different positions where the lifting block contacts the groove are used to adjust the height of the truss seat to adjust the level of the truss base.

[0016] As a further improvement of the present invention, the leveling mechanism further includes a buckle and a buckle spring. A moving groove is opened at one end of the support sleeve facing the screw rod sleeve. The buckle spring is arranged in the moving groove. The buckle is slidably connected to the moving groove. Two ends of the buckle spring are respectively connected to the groove wall of the moving groove and the buckle. A clamping groove is opened at the end of the screw rod sleeve. When the support sleeve is connected to the screw rod sleeve and the buckle is clamped into the clamping groove, the outer walls of the buckle in contact with the clamping groove and the screw rod sleeve are chamfered to form a smooth arc surface.

[0017] As a further improvement of the present invention, the follow-up mechanism includes a follow-up sleeve, an electromagnetic controller, and a docking shaft. The follow-up sleeve is connected to the main shaft screw rod and is arranged at one end of the support sleeve facing away from the screw rod sleeve. An axial hole is opened in the follow-up sleeve along the axial direction of the follow-up sleeve. The electromagnetic controller is arranged at one end of the follow-up sleeve facing away from the support sleeve. The docking shaft is connected to the electromagnetic controller. An axial groove for inserting the docking shaft is opened at the end of the support sleeve. The electromagnetic controller is used to provide electromagnetic force to push the docking shaft to be inserted into the axial groove. The cross-section of the docking shaft is polygonal.

[0018] As a further improvement of the present invention, the follower mechanism further includes a return spring. The shaft hole is a stepped hole. The return spring is sleeved outside the docking shaft. When the docking shaft is inserted into the shaft groove, the return spring is compressed to deform and store energy, so as to provide an elastic force when the docking shaft is separated from the shaft groove.

[0019] As a further improvement of the present invention, a moving guide rail is provided on the bed body. A sliding seat is slidably connected to the moving guide rail, and the sliding seat is connected to the truss seat.

[0020] As a further improvement of the present invention, it further includes:

[0021] A limiting mechanism;

[0022] The limiting mechanism is arranged on the truss seat. The limiting mechanism includes a first hydraulic cylinder, a limiting rack and an engaging rack. A notch is formed on the truss seat, and the engaging rack is fixedly arranged in the notch. A sliding groove for the truss seat to slide is formed on the sliding seat. The first hydraulic cylinder is arranged in the sliding groove. Both ends of the first hydraulic cylinder are respectively connected to the limiting rack. The first hydraulic cylinder is used to control the engagement or separation of the limiting rack and the engaging rack. When the limiting rack is engaged with the engaging rack, the position of the truss seat is locked, so as to lock the horizontal position of the truss base body.

[0023] As a further improvement of the present invention, one side of the truss seat facing the sliding seat is a wedge-shaped surface.

[0024] As a further improvement of the present invention, the fine adjustment mechanism includes a second hydraulic cylinder and a micro-control push rod. A horizontal guide rail slidably connected to the processing assembly is further arranged on the truss base body. An installation frame is arranged on the truss base body. The second hydraulic cylinder is arranged on the installation frame. The end of the output shaft of the second hydraulic cylinder is connected to the micro-control push rod. The micro-control push rod is fixedly connected to the horizontal guide rail. A micro-control groove for the horizontal guide rail to move is further formed on the truss base body.

[0025] Advantages of the present invention:

[0026] 1. When controlling the movement, since the moving mechanism drives the follower mechanism to move synchronously, and the leveling mechanism connects the moving mechanism and the follower mechanism without hindering the movement of the truss base body. When the leveling mechanism is connected to the follower mechanism, the synchronous movement of the follower mechanism drives the adjustment of the contact position between the leveling mechanism and the truss seat, and controls the height adjustment of the truss seats on both sides of the bed body. Due to the connection between the truss base body and the truss seat, when adjusting the height of the truss seat, the horizontal adjustment of the truss base body is realized, and the further adjustment of the fine adjustment mechanism is combined, so as to combine the mechanical coarse adjustment and locking and the hydraulic fine adjustment to respond to the adjustment requirements of high precision;

[0027] 2. When the follow-up mechanism is separated from the leveling mechanism, the follow-up mechanism only moves synchronously with the moving mechanism under the action of the moving mechanism, but does not drive the leveling mechanism, so as to keep the position where the leveling mechanism contacts the truss base unchanged. Therefore, when controlling the truss base to move along the bed, the horizontal state of the truss base is not changed, so as to maintain the precision control during part processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic three-dimensional structure diagram of a numerically controlled machine tool;

[0029] Figure 2 is Figure 1 a partially enlarged view of part A in

[0030] Figure 3 a schematic structure diagram of the truss base;

[0031] Figure 4 is a schematic cross-sectional structure diagram of the follow-up mechanism and the leveling mechanism;

[0032] Figure 5 is an exploded schematic diagram of the lead screw bushing, the support bushing and the follow-up bushing;

[0033] Figure 6 is a schematic structure diagram of the limit mechanism;

[0034] Figure 7 is a system flow chart of the control system for horizontal detection and adjusting the level according to the signal;

[0035] Figure 8 is a system flow chart of detecting the level and generating a signal;

[0036] Figure 9 is a system flow chart of analyzing the signal and controlling the lifting block to adjust the level of the truss base;

[0037] Figure 10 is a system flow chart of reinspecting the level of the truss base.

[0038] Description of the reference numerals: 1. Bed; 11. Moving guide rail; 12. Sliding seat; 2. Combined truss; 21. Truss seat; 22. Truss base; 23. Horizontal guide rail; 24. Clamping plate; 25. Ball bearing; 26. Chute; 27. Micro-control groove; 3. Machining assembly; 31. Machining base frame; 32. Machining head; 33. Feed guide rail; 4. Moving mechanism; 41. Moving motor; 42. Main shaft lead screw; 43. Lead screw bushing; 44. Card slot; 5. Leveling mechanism; 51. Support bushing; 52. Lifting block; 53. Buckle; 54. Buckle spring; 55. Moving slot; 6. Limiting mechanism; 61. Hydraulic cylinder I; 62. Limiting rack; 63. Meshing rack; 7. Follow-up mechanism; 71. Follow-up bushing; 72. Electromagnetic controller; 73. Docking shaft; 74. Return spring; 75. Shaft hole; 76. Shaft groove; 8. Fine-tuning mechanism; 81. Hydraulic cylinder II; 82. Micro-control push rod; 83. Mounting bracket. Detailed implementation manners

[0039] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the present disclosure claimed, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0040] The numerical control machine tool of the present application is used for the production and processing of high-precision and large parts, including but not limited to the processing of precision parts in vehicle, aviation, ship and rail train applications. In the vehicle aspect, it includes but not limited to the impeller processing of turbochargers. In the aviation aspect, it includes but not limited to the processing of curved surface blades of spacecraft. In the ship aspect, it includes but not limited to the processing of the shafting of ship propellers. In the rail train aspect, it includes but not limited to the processing of rail wheel sets. For this, the present application is mainly used for the processing of large parts with strict control of deviations, and controls the accuracy of part processing through the balance adjustment of the horizontal reference, reducing the possibility of errors occurring during the processing.

[0041] Refer to Figure 1 and Figure 2As shown in the figure, this is a specific implementation of a horizontal balance adjustment device for a numerically controlled machine tool according to the present invention, including a machine body 1, a combined truss 2, and a machining assembly 3. A moving guide rail 11 is provided on the machine body 1, and the combined truss 2 is slidably connected along the moving guide rail 11. A moving assembly for driving the combined truss 2 to slide along the moving guide rail 11 is provided on the machine body 1. The combined truss 2 includes a truss seat 21 and a truss base 22. The interior of the truss base 22 is hollowed out to reduce the weight of the overall truss base 22 and provide the moving flexibility of the truss base 22. The moving assembly is connected to the truss seat 21 and is used to control the truss seat 21 to move along the length direction of the moving guide rail 11. The truss base 22 is connected to the truss seat 21 and is horizontally arranged across the machine body 1. The machining assembly 3 is provided on the truss base 22. A horizontal guide rail 23 is also provided on the truss base 22. The horizontal guide rail 23 is connected to the truss base 22, and the machining assembly 3 is slidably connected to the horizontal guide rail 23. The machining assembly 3 includes a machining base 31 and a machining head 32. More specifically, the machining base 31 is slidably connected to the horizontal guide rail 23, and a feed guide rail 33 perpendicular to the horizontal guide rail 23 is further provided in the machining base 31. The machining head 32 is slidably connected to the feed guide rail 33. Among them, the moving guide rail 11, the horizontal guide rail 23, and the feed guide rail 33 respectively provide the movement control of the machining tool head in the X-axis, Y-axis, and Z-axis directions. In this application, the direction of the moving guide rail 11 is defined as the X-axis, the direction of the horizontal guide rail 23 is defined as the Y-axis, and the direction of the feed guide rail 33 is defined as the Z-axis, so as to be able to control the machining head 32 to machine parts according to the machining requirements.

[0042] See Figure 1 、 Figure 3 and Figure 4As shown, the moving assembly and the truss seat 21 are arranged in two groups along both sides of the bed body 1, so that under the action of the moving assembly, the truss seats 21 on both sides can be driven to move synchronously, thereby driving the truss base body 22 to move along the X-axis after being adjusted to the horizontal state. The moving assembly includes a moving mechanism 4. The moving mechanism 4 includes a moving motor 41, a main shaft lead screw 42, and a lead screw sleeve 43. The moving motor 41 is arranged at one end of the bed body 1 along the direction of the horizontal guide rail 23. The output end of the moving motor 41 is coaxially connected to the main shaft lead screw 42 through a coupling. The lead screw sleeve 43 is connected to the main shaft lead screw 42, so that when the moving motor 41 drives the main shaft lead screw 42 to rotate, the lead screw sleeve 43 is controlled to move along the axis direction of the main shaft lead screw 42. A groove for installing the moving assembly is formed on the truss seat 21. Two clamping plates 24 are connected to the truss seat 21 by bolts. The two clamping plates 24 are arranged at intervals along the moving direction of the truss seat 21 on the moving guide rail 11, so that a gap is formed between the two clamping plates 24. The lead screw sleeve 43 is arranged in the gap between the two clamping plates 24. The clamping plates 24 are used to relatively fix the lead screw sleeve 43 and the truss seat 21, so that when the lead screw sleeve 43 is driven by the main shaft lead screw 42 to move, the truss seat 21 is driven to slide synchronously along the moving guide rail 11. A ball bearing 25 is also arranged between the lead screw sleeve 43 and the clamping plate 24, so that the lead screw sleeve 43 can rotate smoothly while being driven by the main shaft lead screw 42 to move, and the clamping plate 24 and the truss seat 21 are connected by bolts, so as to facilitate the installation and disassembly of the lead screw sleeve 43, achieving the purpose of facilitating the maintenance or replacement of the lead screw sleeve 43.

[0043] See Figure 1 、 Figure 3 and Figure 4 As shown, when installing the lead screw sleeve 43, the clamping plate 24 close to the inner side of the truss seat 21 is connected and fixed to the truss seat 21 with bolts. Then the ball bearing 25 is installed. Subsequently, the lead screw sleeve 43 is installed along the axial direction of the main shaft lead screw 42 and coaxially with the ball bearing 25. Finally, the ball bearing 25 and the clamping plate 24 are installed at the other end of the lead screw sleeve 43, so as to fix the lead screw sleeve 43 and the truss seat 21, and the rotation of the lead screw sleeve 43 is not restricted. Furthermore, under the driving action of the main shaft lead screw 42 by the moving motor 41, the truss seat 21 is synchronously driven to move along the X-axis on the moving guide rail 11.

[0044] See Figure 1 、 Figure 5 and Figure 6As shown, a sliding seat 12 is arranged on the moving guide rail 11, a limiting mechanism 6 is arranged in the truss seat 21, the moving assembly further includes a leveling mechanism 5 and a follow-up mechanism 7. The leveling mechanism 5 is used to control the adjustment of the truss seat 21 in the Z-axis direction. Since the leveling mechanism 5 is arranged on both sides of the machine body 1, when adjusting the truss seats 21 on both sides, the level of the truss base body 22 can be adjusted. When the truss seat 21 is adjusted in the Z-axis direction, it slides with the sliding seat 12. When the adjustment of the truss seat 21 stops, the truss seat 21 is limited and locked by the limiting mechanism 6, so as to keep the truss base body 22 level. The follow-up mechanism 7, the leveling mechanism 5 and the lead screw bushing 43 are arranged in sequence along the axis direction of the main shaft lead screw 42. The follow-up mechanism 7 is connected to the main shaft lead screw 42, so that when the main shaft lead screw 42 rotates, it drives the follow-up mechanism 7 and the lead screw bushing 43 to move synchronously. The leveling mechanism 5 is rotationally connected to the lead screw bushing 43, so that when the lead screw bushing 43 is driven by the main shaft lead screw 42, it drives the leveling mechanism 5 to move synchronously. The follow-up mechanism 7 is used to connect or separate from the leveling mechanism 5:

[0045] When the follow-up mechanism 7 is connected to the leveling mechanism 5, when the follow-up mechanism 7 is driven by the main shaft lead screw 42, it also synchronously drives the leveling mechanism 5 to rotate to adjust the position of the truss seat 21 in the Z-axis direction;

[0046] When the follow-up mechanism 7 is separated from the leveling mechanism 5, the follow-up mechanism 7 is driven by the main shaft lead screw 42 to keep synchronous movement with the lead screw bushing 43, and keep contact with one end of the leveling mechanism 5, and the truss seat 21 is locked by the limiting mechanism 6 and remains stationary.

[0047] Reference Figure 1 、 Figure 4 and Figure 5As shown, the leveling mechanism 5 includes a support sleeve 51, a lifting block 52, a buckle 53 and a buckle spring 54. The lifting block 52 is coaxially fixedly connected to the support sleeve 51 and is arranged on the outside of the support sleeve 51. The end of the lifting block 52 away from the support sleeve 51 is arc-shaped. The support sleeve 51 is coaxially arranged with the screw sleeve 43, and a moving groove 55 is opened at one end facing the screw sleeve 43. The buckle spring 54 is arranged in the moving groove 55. The buckle 53 is slidably connected to the moving groove 55. The two ends of the buckle spring 54 are respectively connected to the groove wall of the moving groove 55 and the buckle 53 The buckle spring 54 is arranged along the radial direction of the support sleeve 51, and a clamping groove 44 is opened at the end of the screw sleeve 43, so that when the buckle 53 on the support sleeve 51 is clamped into the clamping groove 44, the screw sleeve 43 is connected to the support sleeve 51, and the outer wall of the buckle 53 in contact with the clamping groove 44 and the screw sleeve 43 is chamfered to form a smooth arc surface, reducing the friction between the buckle 53 and the screw sleeve 43, so that when the screw sleeve 43 rotates, it is not easy to drive the support sleeve 51 to rotate, and it can only synchronously drive the support sleeve 51 to move along the axis of the spindle screw 42. When the leveling mechanism 5 is connected to the screw sleeve 43, an auxiliary device is required. The auxiliary device is used to clamp the buckle 53 so that in the initial state, the auxiliary device limits the buckle 53 from retreating along the movable groove 55 to a position close to the central axis of the support sleeve 51. At this time, the buckle spring 54 is compressed and deformed to store force, so that when the support sleeve 51 and the screw sleeve 43 are installed, after the buckle 53 is aligned with the slot 44, the auxiliary device is removed, and the buckle spring 54 releases the damping force and drives the buckle 53 to move and engage with the slot 44, thereby maintaining the coaxial connection between the support sleeve 51 and the screw sleeve 43.

[0048] refer to Figure 1 , Figure 4 and Figure 5As shown in the figure, the follow-up mechanism 7 includes a follow-up sleeve 71, an electromagnetic controller 72, a docking shaft 73, and a return spring 74. The follow-up sleeve 71 is connected to the main shaft lead screw 42 and is arranged at one end of the support sleeve 51 away from the lead screw sleeve 43, and contacts the end of the support sleeve 51. An axial hole 75 is formed in the follow-up sleeve 71 along the axial direction of the follow-up sleeve 71. The electromagnetic controller 72 is arranged at one end of the follow-up sleeve 71 away from the support sleeve 51. The axial hole 75 is a stepped hole, and the return spring 74 is arranged in a section close to the electromagnetic controller 72. The docking shaft 73 passes through the return spring 74 and is connected to the electromagnetic controller 72. An axial groove 76 for inserting the docking shaft 73 is formed at the end of the support sleeve 51. The electromagnetic controller 72 is used to provide electromagnetic force to push the docking shaft 73 into the axial groove 76 to connect the follow-up sleeve 71 and the support sleeve 51. The cross-section of the docking shaft 73 is polygonal, so that when the docking shaft 73 is inserted into the axial groove 76, when the follow-up sleeve 71 is driven by the main shaft lead screw 42, it can synchronously drive the support sleeve 51 to rotate, and thus drive the lifting block 52 to rotate when the support sleeve 51 rotates. Since one end of the lifting block 52 away from the support sleeve 51 is arc-shaped, it can contact the groove of the truss seat 21 when the lifting block 52 rotates, and push the truss seat 21 to move along the Z-axis direction for leveling. And when the docking shaft 73 is inserted into the axial groove 76, the return spring 74 is in a compressed deformation and energy storage state. When it is necessary to disconnect the connection between the follow-up sleeve 71 and the support sleeve 51, the electromagnetic controller 72 is reversely powered on or powered off. At this time, the return spring 74 releases elastic force to drive the docking shaft 73 to disengage from the axial groove 76, realizing the separation of the follow-up mechanism 7 and the leveling mechanism 5. A magnetic block is also arranged on the outer side of the lifting block 52. The magnetic block is used to adsorb the truss seat 21 when it contacts the truss seat 21, so that when the follow-up mechanism 7 is separated from the leveling mechanism 5, the lifting block 52 remains adsorbed to the truss seat 21, and when the main shaft lead screw 42 drives the follow-up mechanism 7, it is not easy to drive the rotation of the leveling mechanism 5.

[0049] See Figure 1 、 Figure 5 and Figure 6As shown, the limit mechanism 6 includes a first hydraulic cylinder 61, a limit rack 62 and an engaging rack 63. A notch is formed on the truss base 21, and the engaging rack 63 is fixedly arranged in the notch. A sliding groove 26 for the truss base 21 to slide is formed on the sliding seat 12. The first hydraulic cylinder 61 is arranged in the sliding groove 26. The first hydraulic cylinder 61 is a two-way control hydraulic cylinder. The two ends of the first hydraulic cylinder 61 are respectively connected to the limit rack 62, so that when the truss base 21 moves along the sliding groove 26 under the action of the leveling mechanism 5, the first hydraulic cylinder 61 drives the limit rack 62 to move to a state separated from the engaging rack 63. When the truss base 21 completes the horizontal adjustment along the Z-axis direction, the first hydraulic cylinder 61 drives the limit racks 62 at both ends to move towards each other and engage with the engaging rack 63, realizing the limit locking of the truss base 21, so that the truss base body 22 maintains the level state after leveling and is not easy to change. One side of the truss base 21 facing the sliding seat 12 is a wedge surface, so that when the truss base 21 is adjusted along the Z-axis direction, a slight movement along the Y-axis direction will occur. The setting of the wedge surface is used to eliminate the structural deformation caused by the slight movement in the Y-axis direction to maintain the stability of the overall structure.

[0050] See Figure 1 and Figure 2 As shown, a fine adjustment mechanism 8 for controlling the slight movement of the horizontal guide rail 23 along the Z-axis direction is further arranged on the truss base body 22. There are two fine adjustment mechanisms 8, which are respectively arranged at both ends along the length direction of the horizontal guide rail 23. A micro-control groove 27 is formed on the truss base body 22 along the Z-axis direction. The horizontal guide rail 23 is slidably connected with the micro-control groove 27. The fine adjustment mechanism 8 includes a second hydraulic cylinder 81 and a micro-control push rod 82. An installation frame 83 is arranged on the truss base body 22. The second hydraulic cylinder 81 is arranged on the installation frame 83. The end of the output shaft of the second hydraulic cylinder 81 is connected to the micro-control push rod 82, and the micro-control push rod 82 is fixedly connected with the horizontal guide rail 23. When performing a slight leveling control, the second hydraulic cylinder 81 drives the horizontal guide rail 23 to slide along the micro-control sliding groove 26 by pushing the micro-control push rod 82, so as to further level the horizontal guide rail 23, so as to further level the machining reference of the machining assembly 3 and ensure the machining accuracy.

[0051] See Figures 7 to 10As shown in the figure, a detection mark is provided on the bed body 1, and a cursor emitter for emitting a detection aperture is provided on the machining head 32. When detecting whether the truss base 22 is horizontal, the cursor emitter emits a cursor towards the detection mark, and the aperture image within the detection mark is recognized to determine whether the truss base 22 is horizontal. An intelligent device box is also provided in the bed body 1, and a control system for controlling the overall numerical control machine tool is integrated in the intelligent device box. The control system includes a detection module, and the detection module includes a photosensitive sensor and an identification unit. The photosensitive sensor is arranged at the detection mark and is used to identify the detection light emitted by the cursor emitter. The identification unit is used to receive the signal of the photosensitive sensor, convert the combined recognized signal into a detection image, compare the detection image with the detection mark, and a plurality of detection marks are arranged along the Y-axis direction. By sequentially comparing the detection images formed on the detection marks with the detection marks, it is determined whether the truss base 22 remains horizontal, as well as the inclination direction and angle when the truss base 22 is inclined.

[0052] In this application, the detection mark is set as a rhombus, and the structure of the rhombus is the shape style including but not limited to that given in this embodiment. When making a comparison and judgment:

[0053] As Figure 8 shown in the figure, by recognizing the change of the electrical signal when the photosensitive sensor detects the light, the trend of the change of the electrical signal is recorded and a detection image is formed, and it is recognized whether the detection image is circular;

[0054] If the detection image is circular, it is recognized whether the detection image is within the range of the detection mark. When the detection image is not within the range of the detection mark, the processing base frame 31 is controlled to move along the horizontal guide rail 23 on the Y-axis, and when the detection image is driven to move into the detection mark, it is further determined whether the detection image remains circular. If it remains circular, it indicates that the position corresponding to the detection mark is in a horizontal state;

[0055] The detection images are sequentially compared for the positions of multiple detection marks. If the detection images all remain circular, it indicates that the overall truss base 22 and the horizontal guide rail 23 are in a horizontal state;

[0056] If the detection image is non-circular, it indicates that the truss base 22 or the horizontal guide rail 23 is inclined. When inclined, the cursor emitter will be driven to incline, and the presented detection image is an ellipse. First, the processing base frame 31 is controlled to move along the Y-axis to drive the detection image into the detection mark, the long axis of the detection image is divided, and the inclination direction of the long axis within the detection mark is judged.

[0057] The specific judgment method of the long axis tilt includes dividing the detection mark into four quadrants using the perpendicular bisector of the detection mark and setting quadrant marks. When the long axis tilts toward the left and crosses the second and fourth quadrants, it indicates that the light source is tilted to the left; when the long axis tilts toward the right and crosses the first and third quadrants, it indicates that the light source is tilted to the right. And, if all the detection marks show the same tilt result, it means that the truss base 22 is tilted, and the leveling signal 1 is sent at this time; if some of the detection marks show the tilt result, it means that the horizontal guide rail 23 is tilted, and the leveling signal 2 is sent at this time.

[0058] The control system further includes a follow-up control module, which includes an annular pressure sensor, a steering unit and a release unit. The annular pressure sensor is coaxially arranged on the side of the lifting block 52 facing the follow-up sleeve 71, and triggers an electrical signal when the docking shaft 73 conflicts with the annular pressure sensor to identify the relative position between the docking shaft 73 and the shaft groove 76, such as Figure 9 As shown, the steering unit is used to analyze the leveling signal and control the follower mechanism 7 and the moving mechanism 4 to adjust the level of the truss base 22, and send the analyzed leveling signal to the limit release unit, which is used to control the limit mechanism 6 to assist in adjusting the level of the truss base 22. The electromagnetic controller 72 in the follow-up mechanism 7 is energized and pushes out the docking shaft 73 according to the analyzed leveling signal, identifies the position of the docking shaft 73 and controls the rotation of the mobile motor 41 to drive the rotation of the follow-up sleeve 71, thereby driving the docking shaft 73 to move to the position where it is locked with the shaft groove 76, and drives the follow-up sleeve 71 to rotate by controlling the rotation of the mobile motor 41, so as to drive the interference position of the lifting block 52 and the truss seat 21 to be adjusted, thereby lifting the truss seat 21 or lowering the truss seat 21 to level the truss base 22, and controls the limit mechanism 6 to release the limit on the truss seat 21 according to the analyzed leveling signal, so as to control the truss seat 21 to return to the initial position, so as to physically calibrate the initial position of the truss seat 21, and generate a re-check signal when physically calibrating the truss seat 21, and control the detection module based on the re-check signal to detect whether the truss base 22 is horizontal again, and when it is re-checked that the truss base 22 is not in a horizontal state, the follow-up mechanism 7 assists in further horizontal adjustment of the truss base 22.

[0059] The specific steps of the leveling process of the truss base 22 include:

[0060] When analyzing the leveling signal, one side of the bed 1 is defined as the positive direction of the Y-axis, and the other side is defined as the negative direction of the Y-axis. The direction of the machining base 31 toward the bed 1 is defined as the positive direction of the Z-axis, and the side of the machining base 31 away from the bed 1 is defined as the negative direction of the Z-axis. When a left tilt occurs, the Z-axis coordinate value of the truss base 22 located in the positive direction of the Y-axis is set to be a negative value, and the Z-axis coordinate value of the truss base 22 located in the negative direction of the Y-axis is set to be a positive value. The difference calculation is performed on both sides of the truss base 22 to obtain the height difference of the truss base 22.

[0061] Identify the positions of the lifting blocks 52 on both sides of the bed 1 to determine the control of the follow-up mechanism 7 after determining according to the resolved leveling signal. Since the contact surface between the lifting block 52 and the groove of the truss seat 21 is not arc-shaped, respectively identify whether the contact positions between the lifting blocks 52 on both sides and the groove surface of the truss seat 21 are at the extreme lifting positions. The extreme lifting positions include the high lifting value and the low lifting value;

[0062] If there is no extreme lifting position, then raise the side with a negative Z coordinate value of the truss base 22 by a height difference;

[0063] If there is an extreme lifting position and one side is at the high lifting value while the other side has no extreme lifting position, further judge:

[0064] When the Z coordinate value of the side with the high lifting value is positive, then control the follow-up mechanism 7 on this side to level the truss base 22 by reducing the height difference;

[0065] When the Z coordinate value of the side with the high lifting value is negative, then control the follow-up mechanism 7 on this side to level the truss base 22 by raising the height difference;

[0066] If there is an extreme lifting position and one side is at the low lifting value while the other side has no extreme lifting position, further judge:

[0067] When the Z coordinate value of the side with the low lifting value is positive, then control the follow-up mechanism 7 on the other side to level the truss base 22 by raising the height difference;

[0068] When the Z coordinate value of the side with the low lifting value is negative, then control the follow-up mechanism 7 on this side to level the truss base 22 by raising the height difference;

[0069] If one side is at the high lifting value and the other side is at the low lifting value, when the Z coordinate value of the side with the high lifting value is positive, then control the follow-up mechanism 7 on this side to reduce the height of the truss base 22 by the height difference; when the Z coordinate value of the side with the high lifting value is negative, since both sides are at the limit positions of the lifting block 52 and cannot be adjusted at this time, a limit release signal is generated, as Figure 10 shown. The limit mechanism 6 is used to receive the limit release signal and release the limit on the truss seat 21 to restore the truss seat 21 to the initial position. At the same time, the follow-up mechanisms 7 on both sides drive the lifting blocks 52 to be adjusted so that they do not contact the grooves of the truss seat 21. The entire truss base 22 is restored to the initial position, and a re-inspection signal is generated. Based on the re-inspection signal, the detection module is controlled to detect whether the truss base 22 is horizontal again, and the truss base 22 is repeatedly horizontally adjusted according to the detection result to adjust the truss base 22 to a horizontal state.

[0070] Due to the relative rotation between the follower sleeve 71 and the support sleeve 51, when the docking shaft 73 is pushed out by the electromagnetic controller 72, there is a state relationship where it does not correspond to the position of the shaft groove 76. At this time, the end of the docking shaft 73 abuts against the annular pressure sensor and forms a signal point. A signal point chart is pre-stored in the steering unit. Based on the received signal point and the signal point chart, the shortest arc length of the docking shaft 73 from the shaft groove 76 is determined, and the rotation direction to the shortest arc length position is identified. The moving motor 41 is controlled to rotate in the rotation direction and rotate by the angle of the shortest arc length, so as to quickly rotate the docking shaft 73 to dock with the shaft groove 76, realize the insertion of the docking shaft 73 into the shaft groove 76, and complete the docking of the follower mechanism 7 and the leveling mechanism 5.

[0071] Exemplarily, in the present application, the lifting block 52 is set in the form of an elliptical cam so that the height of the truss seat 21 can be adjusted more smoothly during the rotation process. The steering unit is also configured with a corner logic. Based on the corner logic, the height difference between the two sides of the truss base 22 along the bed body 1 is adjusted as needed, and the rotation angle of the support sleeve 51 when driving the lifting block 52 to rotate is calculated. The specific calculation formula for the rotation angle of the support sleeve 51 is as follows:

[0072]

[0073] Among them, θ represents the rotation angle of the lifting block 52, represents the height difference, a represents the major semi-axis length of the lifting block 52, b represents the minor semi-axis length of the lifting block 52. The rotation angle of the support sleeve 51 is obtained by calculation, and the moving motor 41 is controlled to rotate according to the rotation angle, so as to drive the follower sleeve 71 and the support sleeve 51 to rotate synchronously by the angle value of the rotation angle, and realize the horizontal adjustment of the truss base 22.

[0074] The control system further includes a micro-control module. The micro-control module includes parsing the leveling signal two, identifying whether the position where some detection marks are inclined is at the position of the horizontal guide rail 23 on the negative Y-axis or at the position of the positive Y-axis, and generating a fine-tuning difference according to the deviation between the center position of the detection image and the center position of the detection mark. The fine-tuning difference represents the distance value for adjusting the horizontal guide rail 23. The horizontal of the horizontal guide rail 23 is adjusted by controlling the fine-tuning mechanism 8 according to the fine-tuning difference. Among them, the generation method of the fine-tuning difference is obtained based on simple mathematical calculations, which is not a creative solution of the present application. The process that those skilled in the art can implement for calculating the fine-tuning difference based on the prior art will not be elaborated here.

[0075] Working principle and its effect:

[0076] The cursor emitter is driven by moving the truss base 22 and the processing head 32 to move to the detection mark, and a detection image is formed after signal conversion at the detection mark. According to the shape of the detection image, it is judged whether the truss base 22 is tilted and whether the horizontal guide rail 23 is tilted. After detecting the tilt, the truss base 22 and the horizontal guide rail 23 are controlled by the follow-up control module and the micro-control module in the control system to perform horizontal adjustment, so that the processing head 32 maintains accurate processing accuracy during processing and is not prone to errors caused by non-horizontal states.

[0077] When horizontal adjustment of the truss base 22 is required, the docking shaft 73 is pushed out by the energization of the electromagnetic controller 72. If there is a situation where the positions of the docking shaft 73 and the shaft groove 76 do not correspond at this time, the angle for controlling the rotation of the docking shaft 73 can be quickly obtained under the recognition of the annular sensor, so as to control the docking shaft 73 to move to a position corresponding to the shaft groove 76 according to the shortest arc length and push out the docking shaft 73 to be connected with the shaft groove 76 to complete the connection of the follow-up sleeve 71 and the support sleeve 51.

[0078] After parsing the leveling signal 1, the rotation angle for controlling the rotation of the lifting block 52 is obtained. The moving motor 41 is controlled to rotate at the rotation angle, driving the follow-up sleeve 71 to rotate, synchronously driving the support sleeve 51 to rotate, and thus driving the lifting block 52 to rotate at the rotation angle to achieve the purpose of horizontally adjusting the truss base 22. After the adjustment is completed, the electromagnetic controller 72 is controlled to cut off the power or change the current direction, thereby driving the separation of the docking shaft 73 and the shaft groove 76, realizing the separation of the follow-up sleeve 71 and the support sleeve 51, and the lifting block 52 remains attracted to the truss seat 21 under the action of the magnetic block, so that after the separation of the follow-up sleeve 71 and the support sleeve 51, when the moving motor 41 drives the lead screw sleeve 43 and the follow-up sleeve 71 to rotate, the truss base 22 is driven to move along the X-axis direction.

[0079] When controlling the adjustment of the lifting block 52, the hydraulic cylinder 61 in the limit mechanism 6 controls the limit rack 62 to release the meshing limit on the meshing rack 63, so that the truss seat 21 can be adjusted. After the adjustment is completed, the hydraulic cylinder 61 controls the limit rack 62 to mesh with the meshing rack 63 to lock the truss seat 21, and when the truss base 22 moves along the X-axis, the sliding seat 12 connected to the truss seat 21 moves along the moving guide rail 11.

[0080] When it is necessary to control the micro-control module to adjust the horizontal guide rail 23 according to the leveling signal two, the movement of the micro-control push rod 82 is driven by controlling the hydraulic cylinder two 81, and the horizontal guide rail 23 is controlled to move along the micro-control groove 27, so as to realize the horizontal adjustment of the horizontal guide rail 23, thereby adjusting the machining reference plane of the machining head 32 to meet the accuracy requirements, and it is not easy to have machining errors caused by inclination deviation. Furthermore, the adjustment method of mechanical rough adjustment, locking and hydraulic fine adjustment is used to respond to the adjustment requirements of high precision, and the electric control verification is used to adjust the accuracy and improve the adjustment precision.

[0081] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems and devices can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again. In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be in an electrical, mechanical or other form.

[0082] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present disclosure can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A horizontal balance adjustment device for a CNC machine tool, characterized in that: include: Bed (1); A combined truss (2), the combined truss (2) comprising a truss seat (21) and a truss base (22), the truss seat (21) being slidably connected to the bed (1), and a processing assembly (3) for processing a workpiece being slidably connected to the truss base (22); A moving assembly comprises a moving mechanism (4), a leveling mechanism (5) and a follower mechanism (7); the moving mechanism (4) is used to connect with a truss seat (21) and control the truss seat (21) to move along the bed (1); the leveling mechanism (5) is used to connect the follower mechanism (7) and the moving mechanism (4); the moving mechanism (4) is also used to drive the follower mechanism (7) to move synchronously; the leveling mechanism (5) is movably connected with the moving mechanism (4); and the follower mechanism (7) is used to connect with or separate from the leveling mechanism (5); When the follower mechanism (7) is connected to the leveling mechanism (5), it is used to drive the leveling mechanism (5) to adjust the position of the contact with the truss seat (21) to adjust the level of the truss base (22); When the follower mechanism (7) is separated from the leveling mechanism (5), it is used to drive the truss base (22) to move along the bed (1), and the leveling mechanism (5) maintains contact with the truss seat (21) and remains relatively still; The truss base (22) is also provided with a fine adjustment mechanism (8) for finely adjusting the level of the processing assembly (3) using hydraulic pressure.

2. The horizontal balance adjustment device for a CNC machine tool according to claim 1, characterized in that: The moving mechanism (4) comprises a moving motor (41), a main shaft screw (42) and a screw sleeve (43); the moving motor (41) is arranged at one end of the bed (1) and is coaxially connected to the main shaft screw (42) via a coupling; the screw sleeve (43) is connected to the main shaft screw (42); The truss seat (21) is connected to a clamping plate (24), the clamping plate (24) forms a gap for installing a screw sleeve (43), a ball bearing (25) is also provided between the screw sleeve (43) and the clamping plate (24), and the clamping plate (24) is used to limit the screw sleeve (43) to remain relatively fixed with the truss seat (21).

3. The horizontal balance adjustment device for a CNC machine tool according to claim 2, characterized in that: The leveling mechanism (5) comprises a supporting sleeve (51) and a lifting block (52); the supporting sleeve (51) is coaxially arranged with the screw sleeve (43) and movably connected; the lifting block (52) is coaxially fixedly connected with the supporting sleeve (51); a groove is formed on the side of the truss seat (21) on which the screw sleeve (43) is installed; the side of the lifting block (52) facing away from the supporting sleeve (51) is arc-shaped and is used to contact the groove; the lifting block (52) is used to adjust the height of the truss seat (21) at different positions in contact with the groove, so as to adjust the level of the truss base (22).

4. The horizontal balance adjustment device for a CNC machine tool according to claim 3, characterized in that: The leveling mechanism (5) further comprises a buckle (53) and a buckle spring (54); a movable groove (55) is provided at one end of the support sleeve (51) facing the screw sleeve (43); the buckle spring (54) is arranged in the movable groove (55); the buckle (53) is slidably connected to the movable groove (55); two ends of the buckle spring (54) are respectively connected to the groove wall of the movable groove (55) and the buckle (53); a clamping groove (44) is provided at the end of the screw sleeve (43); when the support sleeve (51) is connected to the screw sleeve (43), when the buckle (53) is clamped in the clamping groove (44), the outer wall of the buckle (53) in contact with the clamping groove (44) and the screw sleeve (43) is chamfered to form a smooth arc surface.

5. The horizontal balance adjustment device for a CNC machine tool according to claim 4, characterized in that: The follower mechanism (7) comprises a follower sleeve (71), an electromagnetic controller (72) and a docking shaft (73); the follower sleeve (71) is connected to the main shaft lead screw (42) and is arranged at one end of the support sleeve (51) away from the lead screw sleeve (43); an axial hole (75) along the axial direction of the follower sleeve (71) is provided in the follower sleeve (71); the electromagnetic controller (72) is arranged at one end of the follower sleeve (71) away from the support sleeve (51); the docking shaft (73) is connected to the electromagnetic controller (72); an axial groove (76) for inserting the docking shaft (73) is provided at the end of the support sleeve (51); the electromagnetic controller (72) is used to provide electromagnetic force to push the docking shaft (73) to be inserted into the axial groove (76); the cross section of the docking shaft (73) is polygonal.

6. The horizontal balance adjustment device for a CNC machine tool according to claim 5, characterized in that: The follower mechanism (7) further comprises a return spring (74); the shaft hole (75) is a stepped hole; the return spring (74) is sleeved outside the docking shaft (73); when the docking shaft (73) and the shaft groove (76) are inserted, the return spring (74) is compressed to deform and store force, so as to provide elastic force when the docking shaft (73) and the shaft groove (76) are separated.

7. The horizontal balance adjustment device for a CNC machine tool according to claim 6, characterized in that: The bed (1) is provided with a movable guide rail (11), the movable guide rail (11) is slidably connected with a sliding seat (12), and the sliding seat (12) is connected to a truss seat (21).

8. The horizontal balance adjustment device for a CNC machine tool according to claim 7, characterized in that: Also includes: Limiting mechanism (6); The limiting mechanism (6) is arranged on the truss seat (21), and the limiting mechanism (6) comprises a hydraulic cylinder (61), a limiting rack (62) and an engaging rack (63). The truss seat (21) is provided with a notch, and the engaging rack (63) is fixedly arranged in the notch. The sliding seat (12) is provided with a slide groove (26) for the truss seat (21) to slide. The hydraulic cylinder (61) is arranged in the slide groove (26). The two ends of the hydraulic cylinder (61) are respectively connected to the limiting rack (62). The hydraulic cylinder (61) is used to control the engagement or separation of the limiting rack (62) and the engaging rack (63). When the limiting rack (62) is engaged with the engaging rack (63), the position of the truss seat (21) is locked to lock the horizontal position of the truss base (22).

9. The horizontal balance adjustment device for a CNC machine tool according to claim 8, characterized in that: The side of the truss seat (21) facing the sliding seat (12) is in a wedge-shaped surface.

10. The horizontal balance adjustment device for a CNC machine tool according to claim 9, characterized in that: The fine-tuning mechanism (8) comprises a second hydraulic cylinder (81) and a fine-control push rod (82); a horizontal guide rail (23) slidably connected to the processing assembly (3) is also provided on the truss base (22); a mounting frame (83) is provided on the truss base (22); the second hydraulic cylinder (81) is arranged on the mounting frame (83); the output shaft end of the second hydraulic cylinder (81) is connected to the fine-control push rod (82); the fine-control push rod (82) is fixedly connected to the horizontal guide rail (23); and a fine-control groove (27) for the horizontal guide rail (23) to move is also provided on the truss base (22).

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