An automatic compensation system for cutting movement accuracy of machine tools with high load

Abstract

The invention discloses an automatic compensation system for cutting movement accuracy of a machine tool with high load, which relates to the technical field of numerical control machine tools, including a machine tool; a displacement component is fixedly installed on the front top of the machine tool frame; a temperature sensor with a sensing function is fixedly installed on the front side of the support column of the machine tool frame, and a pneumatic rotating part is arranged to ensure that a driving force is provided for a transmission screw under a single power source, and a cooling effect is also provided for transmission components such as a ball screw, thereby reducing the phenomenon of accuracy error caused by working thermal error; a ball slide assembly is used to ensure that the transmission between it and the transmission screw is kept within a certain error threshold, thereby reducing the change of accuracy error value caused by long-term working wear; the temperature field information of the transmission screw is obtained by components such as a detector and an end locking assembly arranged at the front end of the machine tool, a thermal error segmented compensation model is established, and real-time compensation is realized, thereby effectively reducing the thermal error of the feed system of components such as the transmission screw.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool feeding equipment, in particular to an automatic compensation system for cutting movement accuracy of a machine tool with a high load. Background Art

[0002] Machine tools are the mainstream equipment in today's mechanical manufacturing industry. They are widely used in various fields such as aerospace, aircraft carriers and submarines, and high-tech industries. The accuracy of machine tools is an important parameter to measure the quality of a CNC machine tool. For geometric accuracy problems, the machining accuracy can be improved by adjusting the machine tool base and the machinery of each axis, and some problems that are difficult to improve through machinery can be compensated through parameter optimization.

[0003] When the machine tool is working, because the lead screw nut needs to drive the shaft slide to move, a large amount of friction heat is generated, which causes a temperature difference between the lead screw and the shaft slide / or the shaft slide seat. The size of the workpiece being processed will be incorrect due to the thermal expansion of the lead screw, which reduces the accuracy of the machine tool during actual operation. At the same time, it also lacks consideration of the advantages and disadvantages of a single drive component, as well as the setting of thermal compensation and cooling components. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a high-load machine tool cutting movement accuracy automatic compensation system.

[0005] The present invention is implemented by constructing an automatic compensation system for cutting movement accuracy of a machine tool with high load, the device comprising a machine tool; a displacement assembly is fixedly installed on the front top of the machine tool frame; a temperature sensor with a sensing function is fixedly installed on the front side of the machine tool frame support;

[0006] A slide rail seat is fixedly installed on the front top side of the machine tool frame by bolts; a pneumatic slide is fixedly installed on the middle side of the top of the slide rail seat by bolts; a light sensing guide rail for sensing is fixedly installed on the side of the top of the slide rail seat; an electromagnetic valve is fixedly installed on the air hole on the side of the pneumatic slide through a connecting pipe; the air outlet on the top side of the electromagnetic valve is fixedly connected to the pneumatic rotating part through a connecting pipe; the pneumatic rotating part is arranged on the top side of the layered slide; an end locking assembly is fixedly arranged at the rear end of the pneumatic rotating part.

[0007] Preferably, the pneumatic rotating part includes a guide box fixedly installed on the top side of the slide under the pneumatic slide by bolts, and the air holes on the side of the guide box are connected to the solenoid valve; a vortex fan with gas propulsion function is rotatably arranged on the front side of the guide box; an electromagnetic auxiliary component with transmission auxiliary function is fixedly installed on the rear side of the guide box; a transmission screw with transmission function is plugged and fixed at the center hole of the vortex fan.

[0008] Preferably, the electromagnetic auxiliary component is specifically composed of a stator component fixed to the rear side of the deflector box and a rotor component fixedly installed on the front shaft of the transmission screw; a ball slide assembly is arranged on the transmission screw for transmission.

[0009] Preferably, an interlocking plate is fixedly installed on the top of the ball slide assembly by bolts; an opening is provided on the side of the guide box, and the opening is fixedly connected to the guide pipe; and a nozzle is fixedly installed on the end of the guide pipe.

[0010] Preferably, the ball slide assembly is specifically composed of two groups of ball slides of front and rear structures arranged on the transmission screw, a gasket clamped at the gap between the two groups of ball slides, and a locking plate fixed by bolts at the top screw groove of the ball slide.

[0011] Preferably, the end locking assembly includes a plug-in shaft that is plugged and fixedly installed at the rear end of the transmission screw; an angle sensor with angle sensing function is sleeved and fixed on the shaft body of the plug-in shaft; the rear end of the plug-in shaft is plugged and fixedly installed in an electromagnetic locker; the electromagnetic locker is fixedly installed at the rear end of the magnetic isolation box by bolts.

[0012] Preferably, the pneumatic slide is composed of two sets of sliding slides, and a guide groove is provided on the middle side of the spacing between the lower and upper slides of the pneumatic slide; the optical sensing guide rail is specifically composed of a grating plate fixed on the top side of the slide rail seat and a light sensor sliding on the grating, and the light sensor is fixedly connected to the bottom of the lower slide of the pneumatic slide.

[0013] The present invention has the following advantages: The present invention provides a high-load machine tool cutting movement accuracy automatic compensation system through improvement, which has the following improvements compared with similar equipment:

[0014] The present invention discloses an automatic compensation system for cutting movement accuracy of a machine tool with high load, which provides driving force for the transmission screw under the condition of a single power source by setting a pneumatic rotating part, and also provides cooling effect for transmission components such as ball screw, thereby reducing the phenomenon of accuracy error caused by working thermal error; ensures that the transmission between it and the transmission screw is kept within a certain error threshold through a ball slide assembly, thereby reducing the change of accuracy error value caused by long-term working wear; obtains temperature field information of the transmission screw through components such as detectors and end locking components arranged at the front end of the machine tool, establishes a segmented compensation model for thermal error, and realizes real-time compensation, thereby effectively reducing thermal errors of the feed system of components such as the transmission screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2It is a schematic diagram of the axial structure of the displacement assembly of the present invention;

[0017] Figure 3 It is a schematic diagram of the decomposed structure of the displacement assembly of the present invention;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the pneumatic rotating member of the present invention;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the ball slide assembly of the present invention;

[0020] Figure 6 It is a schematic cross-sectional structural diagram of the end locking assembly of the present invention.

[0021] Among them: machine tool-1, displacement assembly-2, slide rail seat-21, pneumatic slide-22, optical sensor guide rail-23, solenoid valve-24, pneumatic rotating part-25, layered slide-26, end locking assembly-27, guide box-251, vortex fan-252, electromagnetic auxiliary assembly-253, transmission screw-254, ball slide assembly-255, interlocking plate-256, guide tube-257, ball slide cylinder-2551, gasket-2552, locking plate-2553, plug-in shaft-271, angle sensor-272, electromagnetic locker-273, magnetic isolation box-274. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 to Figure 6 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of the embodiments of the present invention based on its overall structure.

[0025] Embodiment 1:

[0026] See also Figure 1 to Figure 6 The present invention discloses an automatic compensation system for cutting movement accuracy of a machine tool with high load, comprising a machine tool 1; a displacement assembly 2 is fixedly installed on the front top of the frame of the machine tool 1; and a temperature sensor with sensing function is fixedly installed on the front side of the frame support of the machine tool 1.

[0027] A slide rail seat 21 is fixedly installed on the front top side of the frame of the machine tool 1 by bolts; a pneumatic slide 22 is fixedly installed on the middle side of the top of the slide rail seat 21 by bolts; a light sensing guide rail 23 for sensing is fixedly installed on the top side of the slide rail seat 21; a solenoid valve 24 is fixedly installed on the air hole on the side of the pneumatic slide 22 through a connecting pipe; the top side air outlet of the solenoid valve 24 is fixedly connected to the pneumatic rotating part 25 through a connecting pipe; the pneumatic rotating part 25 is arranged on the top side of the layered slide 26; and an end locking assembly 27 is fixedly arranged at the rear end of the pneumatic rotating part 25.

[0028] The pneumatic slide 22 is composed of two sets of slides arranged for sliding, and a guide groove is arranged in the middle side of the distance between the upper and lower slides of the pneumatic slide 22; the optical sensing guide rail 23 is specifically composed of a grating plate fixed on the top side of the slide rail seat 21 and a light sensor sliding on the grating, and the light sensor is fixedly connected to the bottom of the lower slide of the pneumatic slide 22.

[0029] The end locking assembly 27 includes a plug-in shaft 271 which is fixedly installed at the rear end of the transmission screw 254; an angle sensor 272 with angle sensing function is sleeved and fixed on the shaft body of the plug-in shaft 271; the rear end of the plug-in shaft 271 is plug-in and fixedly installed in an electromagnetic locker 273; the electromagnetic locker 273 is fixedly installed at the rear end of the magnetic isolation box 274 by bolts.

[0030] Embodiment 2:

[0031] See also Figure 1 to Figure 6, the present invention is a high-load machine tool cutting movement precision automatic compensation system, compared with the first embodiment, this embodiment also includes: a pneumatic rotating member 25; the pneumatic rotating member 25 includes a guide box 251 fixedly installed on the top side of the pneumatic slide 22 by bolts, and the air hole on the side of the guide box 251 is connected to the electromagnetic valve 24; the guide box 251 is internally provided with a vortex fan 252 with a gas propulsion function on the front side; the guide box 251 is internally provided with an electromagnetic auxiliary component 253 with a transmission auxiliary function fixedly installed on the rear side; the vortex fan 252 is internally provided with a vortex fan 252 with a gas propulsion function on the front side; the guide box 251 is internally provided with an electromagnetic auxiliary component 253 with a transmission auxiliary function fixedly installed on the rear side; the vortex fan 252 is internally provided with a vortex fan 252 with a gas propulsion function on the front side; the vortex fan 252 is internally provided with a vortex fan 252 with a gas propulsion function on the front side; the vortex fan 252 is internally provided with an electromagnetic auxiliary component 253 with a transmission auxiliary function fixedly installed on the rear ... fixedly; the vortex fan 252 is internally provided with a vortex fan 252 with a gas propulsion function fixedly; the vortex fan 252 is internally provided with an electromagnetic auxiliary component 253 with a transmission auxiliary function fixedly installed on the rear side A transmission screw 254 with a transmission function is inserted and fixed at the center hole of the flow fan 252; the electromagnetic auxiliary component 253 is specifically composed of a stator component fixed to the inner rear side of the guide box 251 and a rotor component fixedly installed on the front shaft of the transmission screw 254; a ball slide assembly 255 is arranged on the transmission screw 254 for transmission; an interlocking plate 256 is fixedly installed on the top of the ball slide assembly 255 by bolts; an opening is arranged on the side of the guide box 251, and the opening is fixedly connected to the guide pipe 257; a nozzle is fixedly installed at the end of the guide pipe 257.

[0032] The ball slide assembly 255 specifically consists of two sets of ball slides 2551 of front and rear structures that are transmitted and arranged on the transmission screw 254, a gasket 2552 that is clamped in the gap between the two sets of ball slides 2551, and a locking plate 2553 that is fixedly installed in the top screw groove of the ball slide 2551 by bolts.

[0033] Based on the above, the working principle of the automatic compensation system for cutting movement accuracy of a machine tool with high load is:

[0034] First, when using this device, first place the device in the working area, and then connect the device to an external power source to provide the device with the power required for operation;

[0035] Second, when the machine tool is cutting and displacing, the external air pressure is introduced into the pneumatic slide 22 and the pneumatic rotating part 25 through the electromagnetic valve 24. When the electromagnetic valve 24 presses the airflow into the pneumatic slide 22, the pneumatic slide 22 drives the layered slide 26 on the top thereof to slide and displace. The high response performance of the pneumatic slide 22 is used to improve the rapid adjustment of the processed raw materials. When the layered slide 26 slides, it drives the optical sensor in the optical sensor guide rail 23 to slide and detect on the grating plate, so that the optical sensor guide rail 23 detects the propulsion movement data of the pneumatic slide 22.

[0036] Third, when the solenoid valve 24 presses the air pressure into the inside of the pneumatic rotating part 25, the airflow here enters the inside of the guide box 251 and drives the vortex fan 252 to rotate. At the same time, the guide tube 257 is also used to re-extract the airflow inside the guide box 251, and the airflow is guided to the ball slide 2551 through the nozzle at the end of the guide tube 257 to perform airflow heat dissipation action to reduce the working thermal deformation phenomenon, so that the vortex fan 252 drives the transmission screw 254 to transmit. Here, the electromagnetic auxiliary component 253 is energized to generate a magnetic field and assist the rotation force of the transmission screw 254. The transmission screw 254 rotates and transmits with the ball slide 2551 in the ball slide assembly 255, and drives the upper slide of the layered slide 26 to slide through the interlocking plate 256, so that the upper slide of the layered slide 26 drives the workpiece on its top to perform high-precision displacement compensation;

[0037] Fourth, here, the spacing between the two sets of ball slides 2551 is changed by adding a gasket 2552 and a locking plate 2553, so as to reduce the phenomenon of low displacement accuracy caused by wear of the transmission screw 254 and the ball slide 2551, and the position feedback is performed according to the position feedback device set on the layered slide 26, and then the temperature of the displacement component 2 as a whole is detected by the temperature sensor set at the front end of the column of the machine tool 1, and the whole ball screw shaft is evenly divided into n small enough parts along the axial direction, so that the thermal deformation of each section can be regarded as linear expansion, and the thermal error of each position of the workbench can be obtained by linear interpolation of two adjacent segment points S=k n x+b n ,x∈(l n-1 ,l n ], where x is the position of the ball screw table in mm; S is its compensation value in μm; l n is the length of n equal segments, in mm; kn and bn are the compensation model parameters of each segment n in the machine tool 1 system;

[0038] Fifth, the transmission screw 254 is driven to rotate again through the solenoid valve 24 and the electromagnetic auxiliary component 253, so that the transmission screw 254 drives the ball slide assembly 255 to perform transmission displacement compensation, and the angular deflection size of the transmission screw 254 of the displacement S distance is calculated according to the transmission ratio. Here, the transmission angle of the plug-in shaft 271 and the transmission screw 254 is detected by the angle sensor 272, and then the plug-in shaft 271 and the transmission screw 254 are locked by the electromagnetic locker 273, so as to quickly lock the transmission screw 254 to cooperate with the precision compensation action.

[0039] The present invention provides an automatic compensation system for cutting movement accuracy of a machine tool with high load through improvement. The pneumatic rotating part 25 is set to ensure that the driving force is provided for the transmission screw 254 under the condition of a single power source, and also provides a cooling effect for transmission components such as the ball screw, thereby reducing the phenomenon of accuracy error caused by working thermal error; the ball slide assembly 255 is used to ensure that the transmission between it and the transmission screw 254 is maintained within a certain error threshold, thereby reducing the change in the accuracy error value caused by long-term working wear; the temperature field information of the transmission screw 254 is obtained by means of components such as the detector and the end locking assembly 27 set at the front end of the machine tool 1, a thermal error segmented compensation model is established, and real-time compensation is realized, which can effectively reduce the thermal error of the feed system of components such as the transmission screw 254.

[0040] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0041] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic compensation system for cutting movement accuracy of a machine tool with a high load, comprising a machine tool (1); a displacement assembly (2) is fixedly mounted on the front top of a frame of the machine tool (1); a temperature sensor with a sensing function is fixedly mounted on the front side of a frame support of the machine tool (1); Features: The machine tool (1) has a slide rail seat (21) fixedly mounted on the front top side of the frame by bolts; a pneumatic slide table (22) is fixedly mounted on the middle side of the top of the slide rail seat (21) by bolts; a light sensing guide rail (23) for sensing is fixedly mounted on the side of the top of the slide rail seat (21); a solenoid valve (24) is fixedly mounted on the air hole on the side of the pneumatic slide table (22) by a connecting pipe; the top side air outlet of the solenoid valve (24) is fixedly connected to a pneumatic rotating member (25) by a connecting pipe; the pneumatic rotating member (25) is arranged on the top side of the layered slide table (26); and an end locking assembly (27) is fixedly mounted on the rear end of the pneumatic rotating member (25); The pneumatic rotating member (25) comprises a guide box (251) fixedly mounted on the top side of the slide table under the pneumatic slide table (22) by bolts, and the air hole on the side of the guide box (251) is connected to the electromagnetic valve (24); a vortex fan (252) with a gas propulsion function is rotatably arranged on the front side of the guide box (251); an electromagnetic auxiliary component (253) with a transmission auxiliary function is fixedly mounted on the rear side of the guide box (251); a transmission screw (254) with a transmission function is inserted and fixed at the center hole of the vortex fan (252); The electromagnetic auxiliary component (253) specifically comprises a stator component fixed to the inner rear side of the guide box (251) and a rotor component fixedly mounted on the shaft body in front of the transmission screw (254); a ball slide assembly (255) is provided on the transmission screw (254); an interlocking plate (256) is fixedly mounted on the top of the ball slide assembly (255) by means of bolts; an opening is provided on the side of the guide box (251), and the opening is fixedly connected to the guide pipe (257); a nozzle is fixedly mounted on the end of the guide pipe (257); The ball slide assembly (255) specifically comprises two groups of ball slide cylinders (2551) of front and rear structures that are transmission-arranged on a transmission screw rod (254), a gasket (2552) that is clamped at the gap between the two groups of ball slide cylinders (2551), and a locking plate (2553) that is fixedly mounted at the top screw groove of the ball slide cylinder (2551) by means of bolts.

2. According to claim 1, a high-load machine tool cutting movement accuracy automatic compensation system is characterized by: The end locking assembly (27) comprises a plug-in shaft (271) plugged and fixedly mounted at the rear end of the transmission screw (254); an angle sensor (272) having an angle sensing function is sleeved and fixedly mounted on the shaft body of the plug-in shaft (271); the rear end of the plug-in shaft (271) is plugged and fixedly mounted in an electromagnetic locker (273); and the electromagnetic locker (273) is fixedly mounted at the rear end of the magnetic isolation box (274) by means of bolts.

3. According to claim 2, a high-load machine tool cutting movement accuracy automatic compensation system is characterized by: The pneumatic slide (22) is composed of two sets of slides arranged in a sliding manner, and a guide groove is provided in the middle of the distance between the upper and lower slides of the pneumatic slide (22); the optical sensor guide rail (23) is specifically composed of a grating plate fixed to the top side of the slide rail seat (21) and a light sensor sliding on the grating, and the light sensor is fixedly connected to the bottom of the lower slide of the pneumatic slide (22).

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