Self-correcting positioning numerical control lathe

Abstract

The self-correcting positioning numerical control lathe comprises a reference part, a balance suspension assembly and a pushing part, the reference part is vertically arranged, the lower end face of the reference part is parallel to the horizontal plane, and the two ends of the balance suspension assembly are connected with the reference part and a machine base correspondingly; the balance suspension mechanism is used for enabling the reference part to be vertically suspended, the upper end of the reference part is used for being perpendicular to a workpiece and connected with one end of the workpiece, the reference part and the pushing part are both electrically connected with the controller, and the controller controls the pushing part to push the lower end face of the sliding rail to be parallel to the lower end face of the reference part. Due to the adoption of the technical scheme, when a workpiece deviates, the position of the sliding rail can be adjusted, so that when the workpiece is not clamped tightly or a clamping cutter of the chuck or other parts are damaged and the workpiece deviates, the cutter rest can align the workpiece, and the cutting accuracy is ensured to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled lathes, and in particular to a self-correcting and positioning numerically controlled lathe. Background Art

[0002] CNC lathe is one of the most widely used CNC machine tools at present. It is mainly used for cutting and processing of inner and outer cylindrical surfaces of shaft parts or disk parts, inner and outer conical surfaces of arbitrary taper angles, complex rotating inner and outer curved surfaces, and cylindrical and conical threads, and can perform grooving, drilling, reaming, reaming and boring, etc. CNC machine tools automatically process the parts to be processed according to the pre-compiled processing program. The processing route, process parameters, tool movement trajectory, displacement, cutting parameters and auxiliary functions of the parts are compiled into a processing program according to the instruction code and program format specified by the CNC machine tool, and then the contents of the processing program are recorded on the control medium, and then input into the CNC device of the CNC machine tool to control the machine tool to process parts.

[0003] Before using a CNC machine tool, the workpiece needs to be positioned and fixed. Under the existing technology, the workpiece is usually fixed by a manually operated three-jaw chuck. Manual fixing may result in the workpiece not being fixed tightly enough. In particular, when processing some larger workpieces, the manually locked workpieces are prone to loosening, which will lead to large deviations in the workpieces after processing. Secondly, the clamping tool used to fix the workpiece will wear out after long-term use. If it is not replaced in time, it will also cause large processing deviations in the workpiece. Frequent replacement of the clamping tool will lead to further increase in processing costs. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a self-correcting positioning CNC lathe to solve the problem that the clamping tool used to fix the workpiece in the prior art will wear out after long-term use, and if it is not replaced in time, it will also cause large processing deviations in the processed material, and if the clamping tool is replaced frequently, the processing cost will be further increased.

[0005] The present invention is achieved through the following technical solutions: A self-correcting positioning CNC lathe comprises a chuck, a slide rail, a machine base and a controller, wherein the chuck and the slide rail are both mounted on the machine base, the chuck is arranged vertically, the chuck is used to mount a workpiece, and the slide rail is used to mount a tool holder, and is characterized in that it also comprises a reference portion, a balancing suspension assembly and a pushing portion, the reference portion is arranged vertically, the lower end face of the reference portion is parallel to a horizontal plane, the two ends of the balancing suspension mechanism are respectively connected to the reference portion and the machine base, the balancing suspension mechanism is used to suspend the reference portion vertically, the upper end of the reference portion is used to be perpendicular to the workpiece and connected to one end of the workpiece, the reference portion and the pushing portion are both electrically connected to the controller, and the controller controls the pushing portion to push the lower end face of the slide rail to be parallel to the lower end face of the reference portion.

[0006] Furthermore, the reference part includes a supporting block, which is connected to the balancing suspension device, and the lower end face of the supporting block is horizontally arranged. The supporting block is square, and the four corner points of the lower end face of the supporting block are connected to the first pressure sensors, and the four first pressure sensors are electrically connected to the controller. The pushing part includes a supporting plate and a hydraulic rod, and the supporting plate is arranged parallel to the lower end face of the slide rail, and one end of the supporting plate is connected to the lower end face of the slide rail, and the supporting plate is located below the first pressure sensor. There are four hydraulic rods, and the four hydraulic rods are respectively located at the four corners of the lower end face of the slide rail, and the four hydraulic rods are electrically connected to the controller. The four first pressure sensors control the four hydraulic rods one by one through the controller.

[0007] Furthermore, the lower end surface of the slide rail is recessed upward to form a first slide groove, the first slide groove is arranged along the length direction of the slide rail, and also includes a first connecting block, a second connecting block, a first sliding block and a second sliding block, the first connecting block is fixedly connected to the lower end surface of the slide rail, the first sliding block is slidably connected to the first slide groove, and the second connecting block is hinged to the first sliding block; the two hydraulic rods at one end of the slide rail are hinged to the first connecting block, and the two hydraulic rods at the other end of the slide rail are hinged to the second connecting block; the first connecting block and the second connecting block are both recessed upward along the width direction of the slide rail to form a second slide groove, there are two second sliding blocks, the two sliding blocks are slidably connected to the two second sliding grooves respectively, the two hydraulic rods on one side of the slide rail along the width direction are respectively hinged to the two second sliding blocks, and the two hydraulic rods on one side of the slide rail along the width direction are respectively hinged to the first connecting block and the second connecting block.

[0008] Furthermore, the reference part also includes a connecting ring and a connecting rod, the connecting ring is coaxially arranged with the chuck, the inner circumference of the connecting ring matches the outer circumference of the workpiece, the connecting rod is vertically arranged, and the two ends of the connecting rod are respectively connected to the connecting ring and the supporting block; the balancing suspension assembly includes a supporting ring and a spring, the supporting ring is arranged parallel to the chuck, the supporting ring is fixed to the machine base, and the two ends of the spring are respectively connected to the outer circumference of the connecting ring and the inner circumference of the support ring.

[0009] Furthermore, the chuck is an electric chuck, which is electrically connected to the controller; the inner wall of one end of the connecting ring away from the chuck protrudes inward to form a supporting wall, and a second pressure sensor is connected to a side wall of the supporting wall facing the electric chuck, and the second pressure sensor is electrically connected to the controller, and the second pressure sensor controls the electric chuck through the controller.

[0010] Furthermore, there are multiple connecting rings, and the multiple connecting rings are coaxially arranged. The multiple connecting rings are arranged in decreasing order according to the inner radius of the ring body. The inner diameter of the supporting wall of the connecting ring closer to the electric chuck is the inner diameter of the adjacent connecting ring farther from the electric chuck, and two adjacent connecting rings are connected to each other.

[0011] Furthermore, it also includes an alignment mechanism, which includes an adjustment mechanism, a clamping plate and a third pressure sensor. There are two clamping plates, and the clamping surfaces of the two clamping plates are opposite to each other up and down, and the clamping centers of the two clamping plates are opposite to the clamping center of the electric chuck. The third pressure sensor is connected to the clamping plate located at the lower position of the two clamping plates, and the third pressure sensor is electrically connected to the controller. The adjustment mechanism is electrically connected to the controller, and the third pressure sensor controls the adjustment mechanism through the controller to adjust the relative movement distance of the two clamping plates.

[0012] Furthermore, one end of the two clamping plates is provided with a screw hole and a through hole, the two screw holes and the two through holes are opposite to each other, and the two screw holes rotate in opposite directions; the adjusting mechanism includes a base, a screw, a support rod, a first gear, a second gear and a motor, the base is slidably connected to the machine base, the two ends of the screw rotate in opposite directions, the two ends of the screw are respectively screwed into the two screw holes, the screw is vertically arranged, the lower end of the screw is rotatably connected to the base, the support rod is vertically arranged, the support rod passes through the two through holes and is connected to the base, the lower part of the screw is connected to the first gear, the output end of the motor is connected to the second gear, the first gear is meshed with the second gear, the motor is connected to the base, and the motor is electrically connected to the controller.

[0013] Furthermore, the adjustment mechanism also includes an electromagnetic slide rail, the base is an electromagnetic slider, the electromagnetic slider and the electromagnetic slide rail are both electrically connected to the controller, and the third pressure sensor controls the electromagnetic slide rail and the electromagnetic slider through the controller.

[0014] The beneficial effects of the present invention are: When the workpiece is offset, the self-correcting positioning CNC lathe of the present invention can adjust the position of the slide rail, so that the tool holder can be self-corrected and positioned relative to the workpiece. Therefore, when the workpiece is offset due to loose clamping or defects in the clamping knife or other parts of the chuck, it can be aligned, thereby ensuring the cutting accuracy to a certain extent.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a self-correcting and positioning CNC lathe of the present invention; Figure 2 It is a schematic structural diagram of a self-correcting and positioning CNC lathe of the present invention after the outer shell is cut open; Figure 3 It is a schematic diagram of the structure of multiple connecting rings of the present invention; Figure 4 It is a structural schematic diagram of the driving part of the present invention; Figure 5 It is a schematic structural diagram of the regulating mechanism of the present invention.

[0017] In the figure: 1, base; 2, slide rail; 3, electric chuck; 41, first pressure sensor; 42, second pressure sensor; 43, third pressure sensor; 5, abutment block; 6, hydraulic rod; 71, first slide groove; 72, second slide groove; 81, first connecting block; 82, second connecting block; 83, first slider; 84, second slider; 9, support ring; 10, connecting ring; 101, abutment wall; 11, connecting rod; 12, spring; 13, abutment plate; 14, clamping plate; 15, screw; 151, support rod; 16, motor; 181, first gear; 182, second gear; 191, electromagnetic slide rail; 192, electromagnetic slider; DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] See also Figure 1-5 The present invention provides a technical solution: a self-correcting positioning CNC lathe, comprising a chuck, a slide rail 2, a machine base 1 and a controller, wherein the chuck and the slide rail 2 are both mounted on the machine base 1, the chuck is vertically arranged, the chuck is used to mount a workpiece, and the slide rail 2 is used to mount a tool holder, and is characterized in that it also includes a reference part, a balancing suspension assembly and a pushing part, the reference part is vertically arranged, the lower end face of the reference part is parallel to the horizontal plane, the two ends of the balancing suspension mechanism are respectively connected to the reference part and the machine base 1, the balancing suspension mechanism is used to suspend the reference part vertically, the upper end of the reference part is used to be perpendicular to the workpiece and connected to one end of the workpiece, the reference part and the pushing part are both electrically connected to the controller, and the controller controls the pushing part to push the lower end face of the slide rail 2 to be parallel to the lower end face of the reference part.

[0020] When using a self-correcting positioning CNC lathe of the present invention to process a workpiece, the workpiece is first passed horizontally between the clamping knives of the chuck, and then one end of the workpiece is connected to the upper end of the reference part. The chuck is operated to fix the workpiece. At this time, if the workpiece is clamped and the clamping knives and other parts of the chuck are not damaged, the workpiece and the chuck are coaxially arranged and installed on the chuck. At this time, the slide rail 2 is parallel to the workpiece, and the tool holder is also aligned with the workpiece. Since the chuck is vertically arranged, the upper end of the reference part is perpendicular to the workpiece and connected to one end of the workpiece. At this time, the reference part remains vertical and the lower end face of the reference part is horizontal.

[0021] When the workpiece is not clamped or the clamping knife or other parts of the chuck are damaged, causing the installation position of the workpiece to shift, the axial position of the workpiece and the axial position of the chuck will shift. Since the upper end of the reference part is perpendicular to the workpiece and connected to one end of the workpiece, when the workpiece position shifts, the reference part will no longer be vertical, so that the lower end surface of the reference part will no longer be horizontal. At this time, the controller drives the pushing part to push the slide rail 2 to shift in the same direction, so that the lower end surface of the slide rail 2 is parallel to the lower end surface of the reference part. The slide rail 2 shifts so that the slide rail 2 is parallel to the workpiece, and the tool holder can be aligned with the workpiece again.

[0022] With this structure, when the workpiece is offset, the self-correcting positioning CNC lathe of the present invention can adjust the position of the slide rail 2, so that the tool holder can perform self-correcting positioning relative to the workpiece. In this way, when the workpiece is offset due to loose clamping or defects in the clamping knife or other parts of the chuck, it can also be aligned, thereby ensuring the cutting accuracy to a certain extent.

[0023] In this embodiment: the reference part includes a supporting block 5, which is connected to the balancing suspension device, and the lower end face of the supporting block 5 is horizontally arranged. The supporting block 5 is square, and the four corner points of the lower end face of the supporting block 5 are connected with a first pressure sensor 41, and the four first pressure sensors 41 are electrically connected to the controller. The pushing part includes a supporting plate 13 and a hydraulic rod 6, and the supporting plate 13 is arranged parallel to the lower end face of the slide rail 2, and one end of the supporting plate 13 is connected to the lower end face of the slide rail 2, and the supporting plate 13 is located below the first pressure sensor 41. There are four hydraulic rods 6, and the four hydraulic rods 6 are respectively located at the four corners of the lower end face of the slide rail 2, and the four hydraulic rods 6 are electrically connected to the controller. The four first pressure sensors 41 control the four hydraulic rods 6 one by one through the controller.

[0024] When the self-correcting positioning CNC machine tool of the present invention is not used to process the workpiece, the hydraulic rod 6 drives the slide rail 2 so that the lower end surface of the slide rail 2 is located below the reference part. At this time, the support plate 13 is located below the first sensor.

[0025] After the workpiece is mounted on the chuck and the suspension balance assembly, the four hydraulic rods 6 are started so that the output ends of the four hydraulic rods 6 move upward, thereby driving the slide rail 2 to move upward. Since one end of the abutment plate 13 is connected to the lower end surface of the slide rail 2, the upward movement of the slide rail 2 will drive the abutment plate 13 to move upward. At this time, if the workpiece is offset, the abutment block 5 will be offset relative to the horizontal plane along with the offset of the workpiece. When the abutment plate 13 moves upward to abut against one of the first pressure sensors 41, the output end of the hydraulic rod 6 at the corresponding position of the first pressure sensor 41 will stop moving upward, and the output ends of the remaining three hydraulic rods 6 will continue to move upward, thereby driving the lower end surface of the slide rail 2 to shift until the four corners of the abutment block 5 can simultaneously abut against the four first pressure sensors 41. At this time, the output ends of the four hydraulic rods 6 all stop moving upward. At this time, the abutment plate 13 is in contact with the lower end surface of the abutment block 5, and the offset angle of the lower end surface of the slide rail 2 can be parallel to the workpiece. With this structure, the track can be offset at the same angle as the workpiece.

[0026] In this embodiment: the lower end surface of the slide rail 2 is recessed upward to form a first slide groove 71, the first slide groove 71 is arranged along the length direction of the slide rail 2, and also includes a first connecting block 81, a second connecting block 82, a first slider 83 and a second slider 84, the first connecting block 81 is fixed to the lower end surface of the slide rail 2, the first slider 83 is slidably connected to the first slide groove 71, and the second connecting block 82 is hinged to the first slider 83; the two hydraulic rods 6 at one end of the slide rail 2 are hinged to the first connecting block 81, and the two hydraulic rods 6 at the other end of the slide rail 2 are hinged to the second connecting block 82; the first connecting block 81 and the second connecting block 82 are both recessed upward along the width direction of the slide rail 2 to form a second slide groove 72, there are two second sliders 84, the two sliders are slidably connected to the two second slide grooves 72 respectively, the two hydraulic rods 6 on one side of the slide rail 2 along the width direction are respectively hinged to the two second sliders 84, and the two hydraulic rods 6 on one side of the slide rail 2 along the width direction are respectively hinged to the first connecting block 81 and the second connecting block 82.

[0027] When the slide rail 2 is tilted in the length direction, the first slider 83 moves in the first slide groove 71, so that the slide rail 2 can be tilted in the length direction; when the slide rail 2 needs to be tilted in the width direction, the second slider 84 slides in the second slide groove 72, so that the slide rail 2 can be tilted in the width direction. With this structure, the hydraulic rod 6 can drive the slide rail 2 to deflect.

[0028] In this embodiment: the reference part also includes a connecting ring 10 and a connecting rod 11, the connecting ring 10 is coaxially arranged with the chuck, the inner circumference of the connecting ring 10 matches the outer circumference of the workpiece, the connecting rod 11 is vertically arranged, and the two ends of the connecting rod 11 are respectively connected to the connecting ring 10 and the supporting block 5; the balancing suspension assembly includes a supporting ring 9 and a spring 12, the supporting ring 9 is arranged parallel to the chuck, the supporting ring 9 is fixedly connected to the machine base 1, and the two ends of the spring 12 are respectively connected to the outer circumference of the connecting ring 10 and the inner circumference of the support ring 9.

[0029] When a self-correcting positioning CNC machine tool of the present invention is used to process a workpiece, when the workpiece is placed on the chuck, one end of the workpiece can be passed through the connecting ring 10 so that the inner circumferential wall of the connecting ring 10 fits the outer circumferential wall of the workpiece, and then the chuck is operated to clamp the workpiece. Since the inner circumferential surface of the connecting ring 10 matches the outer circumferential surface of the workpiece, the support ring 9 is fixed to the machine base 1, and the two ends of the spring 12 are respectively connected to the outer circumferential surface of the connecting ring 10 and the inner circumferential surface of the support ring 9. If the workpiece is offset, the connecting ring 10 can be driven to tilt. Since the first connecting rod 11 is vertically arranged, the two ends of the first connecting rod 11 are respectively connected to the connecting ring 10 and the supporting block 5, and the supporting block 5 will be offset together with the connecting ring 10. With this structure, the supporting block 5 can be used as a reference for the offset of the slide rail 2.

[0030] In the present embodiment: the chuck is an electric chuck 3, and the electric chuck 3 is electrically connected to the controller; the inner peripheral wall of one end of the connecting ring 10 away from the chuck protrudes inward to form a supporting wall 101, and the supporting wall 101 is connected to a side wall of the electric chuck 3 with a second pressure sensor 42, and the second pressure sensor 42 is electrically connected to the controller, and the second pressure sensor 42 controls the electric chuck 3 through the controller.

[0031] The workpiece is passed through the electric chuck 3, and then the workpiece is continued to be moved along the axial direction of the connecting ring 10. When the end of the workpiece abuts against the abutting wall 101, the second pressure sensor 42 on the abutting wall 101 receives the pressure signal and transmits an electrical signal to the controller. After receiving the electrical signal, the controller sends an electrical signal to the electric chuck 3, so that the electric chuck 3 automatically clamps the workpiece. With this structure, there is no need for workers to make judgments and perform manual clamping.

[0032] In the present embodiment: there are multiple connecting rings 10, and the multiple connecting rings 10 are coaxially arranged. The multiple connecting rings 10 are arranged in decreasing order according to the inner radius of the ring body. The inner diameter of the supporting wall 101 of the connecting ring 10 closer to the electric chuck 3 is the inner diameter of the adjacent connecting ring 10 farther from the electric chuck 3, and two adjacent connecting rings 10 are connected to each other.

[0033] The workpiece passes through the electric chuck 3 and continues to move along the axial direction of the connecting ring 10. When the workpiece moves to a connecting ring 10 among multiple connecting rings 10 whose inner circumferential wall can fit with the outer circumferential surface of the workpiece, the workpiece continues to move and will abut against the second pressure sensor 42 on the abutting wall 101 of the connecting ring 10, thereby allowing the controller to control the electric chuck 3 to clamp the workpiece. With this structure, the reference part can be used to connect workpieces of multiple radius specifications.

[0034] In this embodiment: it also includes an alignment mechanism, which includes an adjustment mechanism, a clamping plate 14 and a third pressure sensor 43. The clamping plate 14 is divided into two pieces, and the clamping surfaces of the two clamping plates 14 face each other up and down, and the clamping centers of the two clamping plates 14 face the clamping center of the electric chuck 3. The third pressure sensor 43 is connected to the clamping plate 14 located at the lower position of the two clamping plates 14. The third pressure sensor 43 is electrically connected to the controller, and the adjustment mechanism is electrically connected to the controller. The third pressure sensor 43 controls the adjustment mechanism through the controller to adjust the relative movement distance of the two clamping plates 14.

[0035] When the workpiece is placed on the lower clamping plate 14 of the two clamping plates 14, the workpiece generates pressure on the third pressure sensor 43, and the third pressure sensor 43 sends an electrical signal to the controller so that the controller controls the adjusting mechanism to drive the two clamping plates 14 to move relative to each other. When the two clamping plates 14 both press against the workpiece, the pressure of the workpiece on the third pressure sensor 43 increases, so that the controller controls the adjusting mechanism to stop adjusting the relative movement distance of the two clamping plates 14 again, and controls the adjusting mechanism to move toward the electric chuck 3, thereby driving the workpiece to move toward the electric chuck 3. With this structure, the workpiece can automatically enter between the clamping knives of the electric chuck 3.

[0036] Since the clamping centers of the two clamping plates 14 are directly opposite to the clamping center of the electric chuck 3, the workpiece can be moved along the axis of the connecting ring 10 toward the connecting ring 10, thereby avoiding to a certain extent the possibility of accidental touching of the workpiece when it is pushed into the centers of multiple connectors, and avoiding the possibility of the electric chuck 3 clamping the workpiece when the workpiece is not aligned with the connecting ring 10, thereby causing the workpiece position to shift; at the same time, the clamping mechanism can align the center of the workpiece during installation, reducing the possibility of the workpiece shifting during clamping.

[0037] In this embodiment: one end of the two clamping plates 14 is provided with a screw hole and a through hole, the two screw holes and the two through holes are opposite to each other, and the two screw holes rotate in opposite directions; the adjustment mechanism includes a base, a screw rod 15, a support rod 151, a first gear 181, a second gear 182 and a motor 16, the base is slidably connected to the base 1, the two ends of the screw rod 15 rotate in opposite directions, the two ends of the screw rod 15 are respectively screwed into the two screw holes, the screw rod 15 is vertically arranged, the lower end of the screw rod 15 is rotatably connected to the base, the support rod 151 is vertically arranged, the support rod 151 passes through the two through holes to connect to the base, the lower part of the screw 15 is connected to the first gear 181, the output end of the motor 16 is connected to the second gear 182, the first gear 181 is meshed with the second gear 182, the motor 16 is connected to the base, and the motor 16 is electrically connected to the controller.

[0038] With this structure, when the third pressure sensor 43 receives pressure, the third pressure sensor 43 sends an electrical signal to the controller so that the controller controls the start and stop motor 16, so that the motor 16 rotates to drive the first gear 181 and the second gear 182 to rotate, thereby rotating the threaded rod. Since one end of the two clamping plates 14 is provided with a screw hole, the two screw holes are opposite to each other, and the two screw holes rotate in opposite directions. The two ends of the screw 15 rotate in opposite directions, and the two ends of the screw 15 are respectively screwed into the two screw holes. The rotation of the screw 15 can make the two clamping plates 14 move toward each other and the clamping center height of the two clamping plates 14 remains unchanged. With this structure, the adjustment mechanism can adjust the clamping distance between the two clamping plates 14, and make the clamping center of the two clamping plates 14 always face the clamping center of the chuck when the two clamping plates 14 move.

[0039] In this embodiment: the adjustment mechanism also includes an electromagnetic slide rail 1912, the base is an electromagnetic slider 192, the electromagnetic slider 192 and the electromagnetic slide rail 1912 are both electrically connected to the controller, and the third pressure sensor 43 controls the electromagnetic slide rail 1912 and the electromagnetic slider 192 through the controller.

[0040] After the controller controls the two clamping plates 14 to stop moving, the controller starts to control the electromagnetic slide block 192 to move on the electromagnetic slide rail 1912 , so that the adjustment mechanism drives the workpiece to move toward the electric chuck 3 .

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A self-correcting positioning CNC lathe, comprising a chuck, a slide rail (2), a machine base (1) and a controller, wherein the chuck and the slide rail (2) are both mounted on the machine base (1), the chuck is arranged vertically, the chuck is used to mount a workpiece, and the slide rail (2) is used to mount a tool holder, and is characterized in that: It also includes a reference part, a balance suspension assembly and a pushing part, wherein the reference part is vertically arranged, and the lower end face of the reference part is parallel to the horizontal plane, and the two ends of the balance suspension mechanism are respectively connected to the reference part and the machine base (1), and the balance suspension mechanism is used to vertically suspend the reference part, and the upper end of the reference part is used to be perpendicular to the workpiece and connected to one end of the workpiece, and the reference part and the pushing part are both electrically connected to the controller, and the controller controls the pushing part to push the lower end face of the slide rail (2) to be parallel to the lower end face of the reference part.

2. A self-correcting positioning CNC lathe according to claim 1, characterized in that: The reference part comprises a supporting block (5), the supporting block (5) is connected to the balancing suspension device, the lower end surface of the supporting block (5) is horizontally arranged, the supporting block (5) is square, the four corner points of the lower end surface of the supporting block (5) are connected to the first pressure sensor (41), the four first pressure sensors (41) are electrically connected to the controller, the pushing part comprises a supporting plate (13) and a hydraulic rod (6), the supporting plate (13) is arranged parallel to the lower end surface of the slide rail (2), one end of the supporting plate (13) is connected to the lower end surface of the slide rail (2), the supporting plate (13) is located below the first pressure sensor (41), there are four hydraulic rods (6), the four hydraulic rods (6) are respectively located at the four corners of the lower end surface of the slide rail (2), the four hydraulic rods (6) are electrically connected to the controller, and the four first pressure sensors (41) control the four hydraulic rods (6) one by one through the controller.

3. A self-correcting positioning CNC lathe according to claim 2, characterized in that: The lower end surface of the slide rail (2) is recessed upward to form a first slide groove (71), and the first slide groove (71) is arranged along the length direction of the slide rail (2), and also includes a first connecting block (81), a second connecting block (82), a first sliding block (83) and a second sliding block (84), the first connecting block (81) is fixedly connected to the lower end surface of the slide rail (2), the first sliding block (83) is slidably connected to the first slide groove (71), and the second connecting block (82) is hinged to the first sliding block (83); the two hydraulic rods (6) at one end of the slide rail (2) are both hinged to the first connecting block (81), and the other end of the slide rail (2) is hinged to the first connecting block (81). The two hydraulic rods (6) are both hinged to the second connecting block (82); the first connecting block (81) and the second connecting block (82) are both recessed upward along the width direction of the slide rail (2) to form a second slide groove (72); there are two second sliding blocks (84), and the two sliding blocks are respectively slidably connected to the two second slide grooves (72); the two hydraulic rods (6) on one side of the slide rail (2) along the width direction are respectively hinged to the two second sliding blocks (84); the two hydraulic rods (6) on one side of the slide rail (2) along the width direction are respectively hinged to the first connecting block (81) and the second connecting block (82).

4. The self-correcting positioning CNC lathe according to claim 3, characterized in that: The reference part also includes a connecting ring (10) and a connecting rod (11), wherein the connecting ring (10) is coaxially arranged with the chuck, the inner circumference of the connecting ring (10) matches the outer circumference of the workpiece, and the connecting rod (11) is vertically arranged, and the two ends of the connecting rod (11) are respectively connected to the connecting ring (10) and the supporting block (5); the balancing suspension assembly includes a supporting ring (9) and a spring (12), wherein the supporting ring (9) is arranged parallel to the chuck, the supporting ring (9) is fixedly connected to the machine base (1), and the two ends of the spring (12) are respectively connected to the outer circumference of the connecting ring (10) and the inner circumference of the support ring (9).

5. The self-correcting positioning CNC lathe according to claim 4, characterized in that: The chuck is an electric chuck (3), and the electric chuck (3) is electrically connected to the controller; the inner peripheral wall of one end of the connecting ring (10) away from the chuck protrudes inward to form a supporting wall (101), and the supporting wall (101) is connected to a second pressure sensor (42) on a side wall facing the electric chuck (3); the second pressure sensor (42) is electrically connected to the controller, and the second pressure sensor (42) controls the electric chuck (3) through the controller.

6. The self-correcting positioning CNC lathe according to claim 5, characterized in that: There are a plurality of connecting rings (10), and the plurality of connecting rings (10) are coaxially arranged. The plurality of connecting rings (10) are arranged in decreasing order according to the inner radius of the ring body. The inner diameter of the supporting wall (101) of the connecting ring (10) closer to the electric chuck (3) is the same as the inner diameter of the adjacent connecting ring (10) farther from the electric chuck (3), and two adjacent connecting rings (10) are connected to each other.

7. The self-correcting positioning CNC lathe according to claim 6, characterized in that: It also includes an alignment mechanism, which includes an adjustment mechanism, a clamping plate (14) and a third pressure sensor (43). The clamping plate (14) is divided into two pieces, and the clamping surfaces of the two clamping plates (14) are opposite to each other in the upper and lower parts. The clamping centers of the two clamping plates (14) are opposite to the clamping center of the electric chuck (3). The third pressure sensor (43) is connected to the clamping plate (14) located at the lower part of the two clamping plates (14). The third pressure sensor (43) is electrically connected to the controller, and the adjustment mechanism is electrically connected to the controller. The third pressure sensor (43) controls the adjustment mechanism through the controller to adjust the relative movement distance of the two clamping plates (14).

8. The self-correcting positioning CNC lathe according to claim 7, characterized in that: One end of the two clamping plates (14) is provided with a screw hole and a through hole, the two screw holes and the two through holes are opposite to each other, and the two screw holes are rotated in opposite directions; the adjustment mechanism comprises a base, a screw rod (15), a support rod (151), a first gear (181), a second gear (182) and a motor (16), the base is slidably connected to the machine base (1), the two ends of the screw rod (15) are rotated in opposite directions, the two ends of the screw rod (15) are respectively screwed into the two screw holes, and the screw rod (15) is vertically The lower end of the screw rod (15) is rotatably connected to the base, the support rod (151) is vertically arranged, the support rod (151) passes through the two through holes and is connected to the base, the lower part of the screw rod (15) is connected to the first gear (181), the output end of the motor (16) is connected to the second gear (182), the first gear (181) is meshed with the second gear (182), the motor (16) is connected to the base, and the motor (16) is electrically connected to the controller.

9. The self-correcting positioning CNC lathe according to claim 8, characterized in that: The adjustment mechanism also includes an electromagnetic slide rail (191), the base is an electromagnetic slider (192), the electromagnetic slider (192) and the electromagnetic slide rail (191) are both electrically connected to the controller, and the third pressure sensor (43) controls the electromagnetic slide rail (191) and the electromagnetic slider (192) through the controller.

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