CN113547343A - Novel numerical control rotary table - Google Patents
Novel numerical control rotary table Download PDFInfo
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- CN113547343A CN113547343A CN202110902174.7A CN202110902174A CN113547343A CN 113547343 A CN113547343 A CN 113547343A CN 202110902174 A CN202110902174 A CN 202110902174A CN 113547343 A CN113547343 A CN 113547343A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
- B23Q7/02—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of drums or rotating tables or discs
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Abstract
The invention relates to a novel numerical control rotary worktable which comprises a base, a worktable body, a mandrel, a supporting bearing, an oil filling pipe, a supporting ring, an angle detection device, a power transmission device, an oil scraper ring and a central control module, wherein the central control module is respectively connected with the angle detection device, the oil filling pipe and the power transmission device and is used for adjusting the working modes of all parts; the top surface of the base is contacted with the bottom surface of the workbench body, and lubricating oil is arranged between the contact surfaces. According to the invention, the top surface of the base and the workbench body are lubricated in an oil bath, so that the workbench body can keep higher load, the rotating speed is ensured by adjusting the torque in the rotating process, the rotating speed is ensured within a standard range, the controllability is increased, and the rotating precision is further increased.
Description
Technical Field
The invention relates to the technical field of workpiece rotation, in particular to a novel numerical control rotary worktable.
Background
The large numerical control machining equipment needs to complete multi-surface machining of parts, and the high-precision rotary worktable is an essential part. The existing rotary working table comprises the following forms: 1. the hydraulic lifting rotary table falls after rotating and is positioned by the mouse tooth disc, although the positioning precision is high, the rotary table cannot participate in linkage, and meanwhile, because the working table and a workpiece need to be lifted in the machining process, the structural form can only be used in the rotary working table with a smaller size; 2. the rotary worktable supported by the rolling blocks has obviously enhanced bearing capacity, but the processing and splicing technology of the steel inlaid surface contacted with the roller blocks is high in content and great in difficulty, and the rolling blocks are originally used for linear motion, but when doing circular motion, the rollers of the rolling blocks are in a rolling and sliding superposed state, so that the rotary worktable of the type is not suitable for high-speed rotation, and the bearing capacity is limited; 3. the large-scale rotary table supported by static pressure has large bearing capacity, can rotate at high speed, is used in large-scale lathes and turning and milling composite machine tools more and cannot ensure the accuracy of axial runout of the rotary table.
In short, the current large-scale rotary worktable cannot meet the requirements of precision, speed and load at the same time due to technical limitation.
Disclosure of Invention
Therefore, the invention provides a novel numerical control rotary table, which is used for overcoming the problems of poor precision and low load of the rotary table in the prior art.
In order to achieve the above object, the present invention provides a novel numerical control rotary table, comprising,
the base is connected with the machine tool body, and a through hole is formed in the center of the base;
the worktable body is arranged above the base and is a rotary part, and the center of the worktable body is provided with a slot; the top surface of the base is in contact with the bottom surface of the workbench body, and lubricating oil is arranged between the contact surfaces;
the mandrel is connected with the central slot of the workbench body and penetrates through the through hole, and a boss is arranged on the mandrel;
the supporting bearing is arranged between the base and the mandrel boss, and the upper surface of the supporting bearing is in contact with the boss;
the oil filling pipe is arranged in the base, and an outlet of the oil filling pipe is positioned between the base and the workbench body;
a support ring disposed between the support bearing and the base to fix the support bearing;
the angle detection device is arranged on the workbench body and used for detecting the rotation angle of the workbench body;
the power conveying device is connected with the mandrel and used for providing power for the rotation of the workbench body;
the central control module is respectively connected with the angle detection device, the oil injection pipe and the power transmission device and is used for adjusting the working modes of all parts;
the central control module is internally provided with an initial moment of the power transmission device to the mandrel, and the central control module adjusts the moment once according to the mass of the workpiece to be rotated;
the angle detection device detects the rotation angle of the workbench body within a preset time length, and carries out secondary adjustment on the moment according to the rotation angle.
Furthermore, a preset quality parameter Az of a rotary workpiece and an initial moment M of a power transmission device to a mandrel are arranged in the central control module, before the numerical control rotary worktable is adopted to rotate the workpiece, the quality A of the workpiece to be rotated is input into the central control module, the central control module compares the quality A of the workpiece to be rotated with the preset quality parameter Az of the rotary workpiece,
when A is less than or equal to Az, the central control module does not adjust the initial moment M;
and when A is larger than Az, the central control module adjusts the initial moment M.
Further, when the central control module adjusts the initial torque due to the mass of the workpiece, the central control module calculates the out-of-tolerance value Δ a of the mass of the workpiece, where Δ a is a-Az, and the central control module adjusts the torque to M ', M' ═ M + Δ a × a according to the out-of-tolerance value Δ a of the mass of the workpiece, where a is an out-of-tolerance value-to-torque adjustment parameter of the mass of the workpiece.
Further, after the moment is determined, the central control module controls the power transmission device to drive the workbench body to rotate through the mandrel by the determined moment, so as to drive the workpiece to rotate, an angle detection time period T1 is further arranged in the central control module, and the angle detection device detects a rotation angle C of the workbench body after a detection time period T1;
a standard rotation angle Cz is arranged in the central control module, the central control module calculates an absolute value delta C of a difference value between the rotation angle C of the worktable body and the standard rotation angle Cz, the delta C is | C-Cz |, an evaluation parameter D of the absolute value of the difference value is also arranged in the central control module, the central control module compares the delta C with the evaluation parameter D of the absolute value of the difference value,
when the delta C is less than or equal to D, the central control module judges that the rotating speed of the workbench body is in a reasonable range;
and when the delta C is larger than the D, the central control module judges that the rotating speed of the workbench body is not in a reasonable range.
Further, when the central control module determines that the rotation speed of the workbench body is not in a reasonable range and C is greater than Cz, the central control module determines that the rotation speed of the workbench body is too high, the central control module adjusts the torque of the next rotation to M1, M1 is M' - Δ C × d1, wherein d1 is a first preset adjustment parameter of the rotation angle difference value to the torque.
Furthermore, a rotation angle maximum difference standard Dm is also arranged in the central control module, when the central control module judges that the rotation speed of the worktable body is not in a reasonable range and C is less than Cz, the central control module compares the absolute value delta C of the difference with the rotation angle maximum difference standard Dm,
when the delta C is less than or equal to Dm, the central control module judges that the main reason causing the too low speed is that the oxford is unreasonably arranged;
when the delta C is larger than the Dm, the central control module judges that the reason causing the speed to be too slow is other factors besides unreasonable torque setting.
Further, when Δ C ≦ Dm, the central control module adjusts the torque of the next rotation to M2, where M2 ═ M' + Δ C × d2, where d2 is a second preset adjustment parameter of the rotation angle difference value to the torque.
Further, when the power transmission device drives the workbench body to rotate through the mandrel at M1 or M2 torque, the angle detection device detects a rotation angle C ' of the workbench body when a detection time length T1 passes, the central control module calculates an absolute value delta C ' of a difference between the rotation angle C ' of the workbench body and a standard rotation angle Cz, the delta C ' is | -C ' -Cz |, the central control module compares the delta C ' with an evaluation parameter D of the absolute value of the difference, and when the delta C ' is less than or equal to D, the central control module judges that the rotation speed of the workbench body is in a reasonable range; when the delta C 'is larger than D, the central control module repeats the operation of adjusting the moment by the rotating angle until the delta C' is less than or equal to D.
Further, when the delta C is larger than the Dm, the central control module controls the oil filling pipe to fill oil between the base and the workbench body, the moment of next rotation is not regulated, after the oil injection is finished, the central control module controls the power conveying device to drive the workbench body to rotate through the mandrel by the determined moment, the angle detection device detects the rotation angle C' of the worktable body after the detection time length T1, the central control module calculates the absolute value delta C ' of the difference value between the rotation angle C ' of the workbench body and the standard rotation angle Cz, and when the absolute value delta C ' is larger than the standard rotation angle Cz, the central control module judges that the rotary workbench has faults, and (4) overhauling the central control module, and when the delta C is less than or equal to Dm, repeating the operation of adjusting the torque by the rotation angle until the delta C' is less than or equal to D.
Compared with the prior art, the invention has the beneficial effects that the top surface of the base is contacted with the bottom surface of the workbench body, and lubricating oil is arranged between the contact surfaces; the central control module is respectively connected with the angle detection device, the oil injection pipe and the power transmission device and is used for adjusting the working modes of all parts; the central control module is internally provided with an initial moment of the power transmission device to the mandrel, and the central control module adjusts the moment once according to the mass of the workpiece to be rotated; the angle detection device detects the rotation angle of the workbench body within a preset time length, and carries out secondary adjustment on the moment according to the rotation angle. According to the invention, the top surface of the base and the workbench body are lubricated in an oil bath, so that the workbench body can keep higher load, the rotating speed is ensured by adjusting the torque in the rotating process, the rotating speed is ensured within a standard range, the controllability is increased, and the rotating precision is further increased.
Particularly, a preset quality parameter Az of a rotary workpiece and an initial moment M of a power conveying device to a mandrel are arranged in the central control module, before the numerical control rotary worktable is adopted to rotate the workpiece, the quality A of the workpiece to be rotated is input into the central control module, the central control module compares the quality A of the workpiece to be rotated with the preset quality parameter Az of the rotary workpiece, the moment is adjusted according to the quality of the workpiece to be rotated, the phenomenon that the worktable is damaged due to too low moment is prevented, the maintenance period is shortened, and meanwhile, the load capacity of the rotary worktable is improved.
In particular, when the central control module adjusts the initial torque due to the mass of the workpiece, the central control module calculates the out-of-tolerance value Δ a of the mass of the workpiece, and the central control module adjusts the torque to M' according to the out-of-tolerance value Δ a of the mass of the workpiece; when waiting to rotate the work piece quality great, adjust the increase moment to moment according to the quality of waiting to rotate the work piece, prevent that moment from crossing excessively to lead to the damage of workstation, extension maintenance cycle, simultaneously, when the quality of work piece is great, increase moment makes numerical control swivel work head can revolve to the great price of quality, has increaseed swivel work head's load carrying capacity.
Further, after the moment is determined, the central control module controls the power transmission device to drive the workbench body to rotate through the mandrel by the determined moment, so as to drive the workpiece to rotate, and the angle detection device detects the rotation angle C of the workbench body after the detection time period T1. The central control module calculates an absolute value delta C of a difference value between the rotation angle C of the workbench body and the standard rotation angle Cz, an evaluation parameter D of the absolute value of the difference value is also arranged in the central control module, the central control module compares the delta C with the evaluation parameter D of the absolute value of the difference value, whether the rotation angle is in a reasonable range or not is judged by detecting the rotation angle within a preset time length, the torque is adjusted through the rotation angle, the rotation speed is guaranteed within a standard range, the controllability is increased, and the rotation precision is further increased.
Particularly, when the central control module determines that the rotating speed of the workbench body is not in a reasonable range and C is larger than Cz, the central control module determines that the rotating speed of the workbench body is too high, the central control module adjusts the torque of the next rotation to M1, when the rotating speed of the rotary workbench is detected to be too high, the torque is reduced, the rotating speed is guaranteed to be in a standard range, controllability is increased, rotating precision is further increased, too fast rotating speed is reduced, excessive-speed work price dislocation or displacement is prevented, and safety of workpiece processing is guaranteed while the rotating precision is further increased.
Furthermore, the central control module is internally provided with a standard Dm of the maximum difference value of the rotation angle, when the central control module judges that the rotation speed of the workbench body is not in a reasonable range and C is less than Cz, the central control module compares the absolute value delta C of the difference value with the standard Dm of the maximum difference value of the rotation angle, when the rotation speed of the rotary workbench is detected to be too low, the reasons of insufficient rotation speed are more, such as insufficient torque, excessive friction, instrument damage and the like, so when the rotation speed of the rotary workbench is detected to be too low, the rotation speed is compared for the second time, a corresponding processing mode is selected according to the comparison result, the safety of the rotary workbench is guaranteed while the rotation speed is intelligently regulated and controlled, the damage of the workbench caused by too low torque is prevented, and the maintenance period is prolonged.
Particularly, when the delta C is less than or equal to the Dm, the central control module adjusts the torque of the next rotation to M2, when the fact that the rotating speed of the rotary table is too low but within a controllable range is detected, the central control module judges that the too low speed is caused by insufficient torque, the torque is increased, the rotating speed is guaranteed to be within a standard range, controllability is improved, and the rotation precision is further improved.
Further, when the power transmission device drives the workbench body to rotate through the mandrel at M1 or M2 torque, the angle detection device detects the rotation angle C ' of the workbench body when the detection time length T1 passes, the central control module calculates the absolute value delta C ' of the difference between the rotation angle C ' of the workbench body and the standard rotation angle Cz, the central control module compares the delta C ' with the evaluation parameter D of the absolute value of the difference, and when the delta C ' is less than or equal to D, the central control module judges that the rotation speed of the workbench body is in a reasonable range; when the delta C 'is larger than D, the central control module repeats the operation of adjusting the moment by the rotating angle until the delta C' is less than or equal to D. When the moment is adjusted, the rotation angle of the workbench body is periodically detected until the rotation speed is guaranteed to be within a standard range, controllability is improved, and rotation precision is further improved.
Further, when the delta C is larger than the Dm, the central control module controls the oil injection pipe to inject oil between the base and the workbench body, the next rotating moment is not adjusted, after the oil injection is completed, the central control module controls the power conveying device to drive the workbench body to rotate through the mandrel by determined moment, the angle detection device detects the rotating angle C 'of the workbench body when the detection time length T1 passes, the central control module calculates the absolute value delta C' of the difference value between the rotating angle C 'of the workbench body and the standard rotating angle Cz, when the delta C is larger than the detection time length T1, the central control module judges that the rotary workbench breaks down and overhauls the rotary workbench, and when the delta C is smaller than or equal to the Dm, the central control module repeats the rotating angle to adjust the moment until the delta C' is smaller than or equal to the D. When detecting that the revolving table rotational speed is low excessively and when not being in controllable scope, well accuse module control the oiling pipe to the base with carry out the oiling between the workstation body to detect the rotation angle of long interior revolving table of length when next rotation, be used for judging the not enough reason of rotation angle and be by too big or internal apparatus problem, when the revolving table rotational speed after the oiling is low excessively and when not being in controllable scope, well accuse module judges the revolving table breaks down, overhauls it, in time discovers the apparatus, overhauls, when guaranteeing maintenance speed, prevents to discover the problem untimely, leads to the cost of labor to dislocate or the displacement, has also ensured the security of work piece processing when further increasing rotatory precision.
Drawings
Fig. 1 is a schematic structural diagram of a novel numerical control rotary table according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a novel numerical control rotary table according to the present invention. The invention provides a novel numerical control rotary table, which comprises,
the base 1 is connected with the machine tool body, and a through hole is formed in the center of the base 1;
the worktable body 2 is arranged above the base 1 and is a rotary part, and the center of the worktable body 2 is provided with a slot;
the mandrel 3 is connected with the central slot of the worktable body 2 and penetrates through the through hole, and a boss is arranged on the mandrel 3;
the supporting bearing 4 is arranged between the base 1 and the boss of the mandrel 3, and the upper surface of the supporting bearing 4 is contacted with the boss;
the oil filling pipe 8 is arranged inside the base 1, and an outlet of the oil filling pipe 8 is positioned between the base 1 and the workbench body 2;
a support ring 5 disposed between the support bearing 4 and the base 1 to fix the support bearing 4;
an angle detection device 6 provided on the table body 2 for detecting a rotation angle of the table body 2;
the power conveying device is connected with the mandrel 3 and used for providing power for the rotation of the workbench body 2;
the top surface of the base 1 is contacted with the bottom surface of the worktable body 2, and lubricating oil is arranged between the contact surfaces;
an oil slinger 7 which is arranged on the base 1 and prevents lubricating oil from flowing out between the base 1 and the worktable body 2;
the central control module is respectively connected with the angle detection device 6, the oil injection pipe 8 and the power transmission device and is used for adjusting the working modes of all parts;
the central control module is internally provided with an initial moment of the mandrel 3 by the power transmission device, and the central control module adjusts the moment once according to the mass of the workpiece to be rotated;
the angle detection device 6 detects the rotation angle of the workbench body 2 within a preset time length, and secondarily adjusts the moment according to the rotation angle.
According to the invention, the top surface of the base 1 and the worktable body 2 are subjected to oil bath lubrication, so that the worktable body 2 can keep higher load, the rotating speed is ensured by adjusting the moment in the rotating process, the rotating speed is ensured within a standard range, the controllability is increased, and the rotating precision is further increased.
Specifically, a preset quality parameter Az of a rotary workpiece and an initial moment M of a power transmission device to a mandrel 3 are arranged in the central control module, before the numerical control rotary worktable is adopted to rotate the workpiece, the quality A of the workpiece to be rotated is input into the central control module, the central control module compares the quality A of the workpiece to be rotated with the preset quality parameter Az of the rotary workpiece,
when A is less than or equal to Az, the central control module does not adjust the initial moment M;
and when A is larger than Az, the central control module adjusts the initial moment M.
The moment is adjusted according to the mass of the workpiece to be rotated, the damage of the workbench caused by too low moment is prevented, the maintenance period is shortened, and meanwhile, the load capacity of the rotary workbench is increased.
Specifically, when the central control module adjusts the initial torque due to the mass of the workpiece, the central control module calculates an out-of-tolerance value Δ a of the mass of the workpiece, where Δ a is a-Az, and the central control module adjusts the torque to M ', M' ═ M + Δ a × a according to the out-of-tolerance value Δ a of the mass of the workpiece, where a is an out-of-tolerance value-to-torque adjustment parameter of the mass of the workpiece;
when waiting to rotate the work piece quality great, adjust the increase moment to moment according to the quality of waiting to rotate the work piece, prevent that moment from crossing excessively to lead to the damage of workstation, extension maintenance cycle, simultaneously, when the quality of work piece is great, increase moment makes numerical control swivel work head can revolve to the great price of quality, has increaseed swivel work head's load carrying capacity.
Specifically, after the moment is determined to be completed, the central control module controls the power transmission device to drive the worktable body 2 to rotate through the mandrel 3 with the determined moment, so as to drive the workpiece to rotate, an angle detection time period T1 is further arranged in the central control module, and the angle detection device 6 detects a rotation angle C of the worktable body 2 when a detection time period T1 passes.
Specifically, a standard rotation angle Cz is set in the central control module, the central control module calculates an absolute value Δ C of a difference between the rotation angle C of the table body 2 and the standard rotation angle Cz, where Δ C | -C-Cz |, an evaluation parameter D of the absolute value of the difference is also set in the central control module, the central control module compares Δ C with the evaluation parameter D of the absolute value of the difference,
when the delta C is less than or equal to D, the central control module judges that the rotating speed of the workbench body 2 is in a reasonable range;
and when the delta C is larger than the D, the central control module judges that the rotating speed of the workbench body 2 is not in a reasonable range.
Whether the rotating angle is in a reasonable range or not is judged by detecting the rotating angle within the preset time, the torque is adjusted through the rotating angle, the rotating speed is guaranteed within a standard range, controllability is improved, and rotating precision is further improved.
Specifically, when the central control module determines that the rotation speed of the worktable body 2 is not in a reasonable range and C > Cz, the central control module determines that the rotation speed of the worktable body 2 is too high, and the central control module adjusts the torque of the next rotation to M1, where M1 is M' - Δ C × d1, where d1 is a first preset adjustment parameter of the rotation angle difference value to the torque.
When the rotating speed of the rotary worktable is detected to be too high, the torque is reduced, the rotating speed is guaranteed to be within a standard range, the controllability is increased, the rotating precision is further increased, the too high rotating speed is reduced, the too high speed is prevented from dislocation or displacement, and the safety of workpiece processing is guaranteed while the rotating precision is further increased.
Specifically, the central control module is also provided with a standard Dm of the maximum difference of the rotation angle, when the central control module determines that the rotation speed of the worktable body 2 is not in a reasonable range and C is less than Cz, the central control module compares the absolute value Delta C of the difference with the standard Dm of the maximum difference of the rotation angle,
when the delta C is less than or equal to Dm, the central control module judges that the main reason causing the too low speed is that the oxford is unreasonably arranged;
when the delta C is larger than the Dm, the central control module judges that the reason causing the speed to be too slow is other factors besides unreasonable torque setting.
When detecting that the swivel work head rotational speed is low excessively, cause the not enough reason of rotational speed more, if moment is not enough, the friction is too big, the apparatus damages etc. so, when detecting that the swivel work head rotational speed is low excessively, carry out the secondary contrast to the rotational speed, select corresponding processing mode according to the contrast result, when having ensured intelligent control rotational speed, ensured swivel work head's security, prevent that moment from crossing the damage that leads to the workstation excessively, extension maintenance cycle.
Specifically, when Δ C ≦ Dm, the central control module adjusts the torque of the next rotation to M2, M2 ═ M' + Δ C × d2, where d2 is a second preset adjustment parameter of the rotation angle difference value to the torque.
When the rotating speed of the rotary worktable is detected to be too low but within a controllable range, the central control module judges that the too low speed is caused by insufficient torque, so that the torque is increased, the rotating speed is guaranteed to be within a standard range, the controllability is increased, and the rotating precision is further increased.
Specifically, when the power transmission device drives the worktable body 2 to rotate through the mandrel 3 at M1 or M2 torque, the angle detection device 6 detects the rotating angle C 'of the worktable body 2 when the detection time length T1 passes, the central control module calculates the absolute value Δ C', Δ C '-Cz |, of the difference between the rotating angle C' of the worktable body 2 and the standard rotating angle Cz, the central control module compares Δ C 'with the evaluation parameter D of the absolute value of the difference, and when Δ C' is less than or equal to D, the central control module determines that the rotating speed of the worktable body 2 is in a reasonable range; when the delta C 'is larger than D, the central control module repeats the operation of adjusting the moment by the rotating angle until the delta C' is less than or equal to D.
When the moment is adjusted, the rotation angle of the worktable body 2 is periodically detected until the rotation speed is ensured within a standard range, so that the controllability is improved, and the rotation precision is further improved.
Specifically, when Δ C > Dm, the central control module controls the oil filling pipe 8 to fill oil between the base 1 and the work table body 2, and the torque for the next rotation is not adjusted, after the oil filling is completed, the central control module controls the power transmission device to drive the work table body 2 to rotate through the mandrel 3 with a determined torque, the angle detection device 6 detects the rotation angle C 'of the work table body 2 after a detection time period T1, the central control module calculates the absolute value Δ C', Δ C '-Cz of the difference between the rotation angle C' of the work table body 2 and the standard rotation angle Cz, when Δ C > Dm, the central control module determines that the rotary work table is out of order and overhauls the rotary work table, and when Δ C is less than or equal to Dm, the central control module repeats the rotation angle-torque adjustment operation, until the delta C' is less than or equal to D.
When detecting that the revolving table rotational speed is low excessively and when not being in controllable range, well accuse module control oiling pipe 8 to base 1 with carry out the oiling between the workstation body 2 to detect the rotation angle of revolving table in long time when next rotation, be used for judging that the reason that the rotation angle is not enough is because too big or internal apparatus goes wrong by frictional force, when the revolving table rotational speed after the oiling is low excessively and when not being in controllable range, well accuse module judges that the revolving table breaks down, overhauls it, in time discovers the apparatus, overhauls in time, when guaranteeing maintenance speed, prevents to discover the problem untimely, leads to the cost of labor to dislocate or the displacement, has also ensured the security of work piece processing when further increasing rotatory precision.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A novel numerical control rotary worktable is characterized by comprising,
the base is connected with the machine tool body, and a through hole is formed in the center of the base;
the worktable body is arranged above the base and is a rotary part, and the center of the worktable body is provided with a slot;
the mandrel is connected with the central slot of the workbench body and penetrates through the through hole, and a boss is arranged on the mandrel;
the supporting bearing is arranged between the base and the mandrel boss, and the upper surface of the supporting bearing is in contact with the boss;
the oil filling pipe is arranged in the base, and an outlet of the oil filling pipe is positioned between the base and the workbench body;
a support ring disposed between the support bearing and the base to fix the support bearing;
the angle detection device is arranged on the workbench body and used for detecting the rotation angle of the workbench body;
the power conveying device is connected with the mandrel and used for providing power for the rotation of the workbench body;
the central control module is respectively connected with the angle detection device, the oil injection pipe and the power transmission device and is used for adjusting the working modes of all parts;
the top surface of the base is in contact with the bottom surface of the workbench body, and lubricating oil is arranged between the contact surfaces;
the central control module is internally provided with an initial moment of the power transmission device to the mandrel, and the central control module adjusts the moment once according to the mass of the workpiece to be rotated;
the angle detection device detects the rotation angle of the workbench body within a preset time length, and carries out secondary adjustment on the moment according to the rotation angle.
2. The novel numerical control rotary table according to claim 1, wherein a rotary workpiece preset quality parameter Az and an initial moment M of a power transmission device to a mandrel are arranged in the central control module, before the numerical control rotary table is used for rotating a workpiece, the central control module inputs the quality A of the workpiece to be rotated, compares the quality A of the workpiece to be rotated with the rotary workpiece preset quality parameter Az,
when A is less than or equal to Az, the central control module does not adjust the initial moment M;
and when A is larger than Az, the central control module adjusts the initial moment M.
3. The novel numerically controlled rotary table according to claim 2, wherein when the central control module adjusts the initial moment due to the mass of the workpiece, the central control module calculates the out-of-tolerance Δ a, Δ a-Az of the mass of the workpiece, and the central control module adjusts the moment to M ', M' ═ M + Δ a × a according to the out-of-tolerance Δ a of the mass of the workpiece, where a is an out-of-tolerance value-to-moment adjustment parameter of the mass of the workpiece.
4. The novel numerical control rotary table according to claim 3, wherein when the torque determination is completed, the central control module controls the power transmission device to drive the table body to rotate through the mandrel at the determined torque so as to drive the workpiece to rotate, an angle detection time period T1 is further provided in the central control module, and the angle detection device detects a rotation angle C of the table body after a detection time period T1;
a standard rotation angle Cz is arranged in the central control module, the central control module calculates an absolute value delta C of a difference value between the rotation angle C of the worktable body and the standard rotation angle Cz, the delta C is | C-Cz |, an evaluation parameter D of the absolute value of the difference value is also arranged in the central control module, the central control module compares the delta C with the evaluation parameter D of the absolute value of the difference value,
when the delta C is less than or equal to D, the central control module judges that the rotating speed of the workbench body is in a reasonable range;
and when the delta C is larger than the D, the central control module judges that the rotating speed of the workbench body is not in a reasonable range.
5. The novel numerically controlled rotary table according to claim 4, wherein when the central control module determines that the rotation speed of the table body is not within the reasonable range and C > Cz, the central control module determines that the rotation speed of the table body is too high, and the central control module adjusts the torque of the next rotation to M1, M1 ═ M' - Δ C × d1, wherein d1 is a first preset adjustment parameter of the rotation angle difference to the torque.
6. The novel numerical control rotary table according to claim 5, wherein a rotation angle maximum difference standard Dm is further provided in the central control module, and when the central control module determines that the rotation speed of the table body is not within a reasonable range and C is less than Cz, the central control module compares the absolute value Δ C of the difference with the rotation angle maximum difference standard Dm,
when the delta C is less than or equal to Dm, the central control module judges that the main reason causing the too low speed is that the oxford is unreasonably arranged;
when the delta C is larger than the Dm, the central control module judges that the reason causing the speed to be too slow is other factors besides unreasonable torque setting.
7. The novel numerically controlled rotary table according to claim 6, wherein when Δ C ≦ Dm, the central control module adjusts the torque for the next rotation to M2, M2 ═ M' + Δ C × d2, where d2 is the second preset adjustment parameter for the differential value of the rotation angle to the torque.
8. The novel numerical control rotary table according to claim 7, wherein when the power transmission device drives the table body to rotate through the mandrel at M1 or M2 torque, the angle detection device detects the rotation angle C ' of the table body after the detection time period T1, the central control module calculates the absolute value Δ C ', Δ C ═ C ' -Cz |, of the difference between the rotation angle C ' of the table body and the standard rotation angle Cz, the central control module compares Δ C ' with the evaluation parameter D of the absolute value of the difference, and when Δ C ≦ D, the central control module determines that the rotation speed of the table body is within a reasonable range; when the delta C 'is larger than D, the central control module repeats the operation of adjusting the moment by the rotating angle until the delta C' is less than or equal to D.
9. The new numerically controlled rotary table according to claim 8, wherein the central control module controls the oil filling pipe to fill oil between the base and the table body without adjusting the torque for the next rotation when Δ C > Dm, the central control module controls the power transmission device to rotate the table body through the spindle with a certain torque after the completion of the oil filling, the angle detection device detects the rotation angle C 'of the table body after a detection time period T1, the central control module calculates the absolute value Δ C', Δ C '-Cz of the difference between the rotation angle C' of the table body and the standard rotation angle Cz, the central control module determines that the rotary table is out of order and overhauls the rotary table when Δ C > Dm remains, and the central control module repeats the rotation angle adjustment operation when Δ C > Dm, until the delta C' is less than or equal to D.
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