CN210209409U - Machine tool for compensating gantry double-drive motion deviation - Google Patents
Machine tool for compensating gantry double-drive motion deviation Download PDFInfo
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- CN210209409U CN210209409U CN201921169045.6U CN201921169045U CN210209409U CN 210209409 U CN210209409 U CN 210209409U CN 201921169045 U CN201921169045 U CN 201921169045U CN 210209409 U CN210209409 U CN 210209409U
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Abstract
The utility model discloses a machine tool for compensating gantry double-drive motion deviation, which comprises a bottom plate; an arched gantry; the two driving devices are arranged on the bottom plate and used for driving the portal frame to move along the front-back direction and acquiring the actual displacement and the input displacement of the end part of the portal frame; and the industrial personal computer is used for sending a driving signal to the driving device, acquiring the actual displacement and the input displacement of the end part of the portal frame from the driving device, calculating the displacement deviation amount of the end part of the portal frame, and sending the displacement deviation amount to the driving device. The machine tool can eliminate the displacement deviation of the end part of the portal frame, avoid the bending of the cross beam of the portal frame and ensure the straightness of the linear track, thereby solving the problem of reducing the production precision of the machine tool.
Description
Technical Field
The utility model relates to a digit control machine tool technical field especially relates to a compensation longmen two machine tools that drive the motion deviation.
Background
Since the twentieth century, along with technological innovations in various emerging fields such as information technology, biotechnology, new material technology, laser technology, and photolithography technology, leading-edge manufacturing technologies such as digital manufacturing, green manufacturing, micro-nano manufacturing, and intelligent manufacturing in the manufacturing industry field begin to become important components of the strong national strategy for manufacturing in a comprehensive way.
Among them, the nano-scale high-speed machining has become the mainstream development direction in the global manufacturing field, and the topic report of the machine tool feed drive transmission system of the international production engineering society in 2011 indicates that in the future, on the basis of ensuring high precision, the feed speed of the machine tool can reach as high as 50m/min (meters/min), the feed acceleration can be at least 10g (namely 10 times of gravity acceleration), and the rotating speed of the main shaft can reach 500000rpm (revolutions per minute).
At present, in the process of high-speed operation of a traditional gantry double-drive linear platform, a certain deviation exists between the actual displacement and the input displacement of the end part of a gantry, so that a machine tool cannot carry out high-precision production; in addition, certain deviation often also can exist between the portal frame both ends, and the portal frame can take place deformation under the restriction of straight line track, still can destroy straight line track's structure and straightness accuracy correspondingly.
Therefore, how to eliminate the position deviation of the end of the gantry is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compensation longmen is two to drive lathe of motion deviation, this lathe can eliminate the displacement deviation of portal frame tip, avoid the crossbeam of portal frame crooked and guarantee the orbital straightness accuracy of straight line, and then has solved the problem that lathe production precision reduces.
In order to achieve the above object, the utility model provides a compensation longmen is two to be driven machine tool of deviation of motion, include: a base plate; an arched gantry; the two driving devices are arranged on the bottom plate and used for driving the portal frame to move along the front-back direction and acquiring the actual displacement and the input displacement of the end part of the portal frame; and the industrial personal computer is used for sending a driving signal to the driving device, acquiring the actual displacement and the input displacement of the end part of the portal frame from the driving device, calculating the displacement deviation amount of the end part of the portal frame, and sending the displacement deviation amount to the driving device.
Preferably, all of the driving means comprise: the moving platform is connected with the end part of the portal frame and used for adjusting the relative position between the moving platform and the end part of the portal frame along the front-back direction according to the displacement deviation amount; the grating guide rail is matched with the mobile platform and used for detecting the actual displacement of the mobile platform; and the linear motor is connected with the movable platform and used for driving the movable platform to move along the grating guide rail according to the driving signal.
Preferably, the mobile platform comprises: the bottom of the moving frame is matched with the grating guide rail, and the top of the moving frame is sequentially provided with a compensation groove and a placing groove from front to back; the compensation block is arranged in the compensation groove and used for supporting and connecting the end part of the portal frame; the piezoelectric ceramic is arranged in the placing groove and electrically connected with the industrial personal computer, wherein the output end of the piezoelectric ceramic extends into the compensation groove from the placing groove and is fixedly connected with the compensation block so as to drive the compensation block to move in the compensation groove along the front-back direction.
Preferably, the compensation block is connected with the compensation groove through a flexible hinge, wherein the flexible hinge extends in the left-right direction to allow the compensation block to move in the compensation groove in the front-back direction.
Preferably, the flexible hinge is in particular a straight beam type flexible hinge.
Preferably, four straight beam type flexible hinges are provided.
Preferably, the mobile platform further comprises a displacement sensor arranged on the front wall of the compensation tank and used for detecting the distance between the compensation block and the front wall of the compensation tank.
Preferably, the displacement sensor is embodied as a capacitive sensor.
Compared with the prior art, the utility model provides a compensation longmen is two to be driven machine tool of motion deviation guarantees that the actual displacement volume of portal frame tip equals with the input displacement volume through drive arrangement according to the relative position of displacement deviation volume adjustment portal frame tip and drive arrangement between along the fore-and-aft direction. Particularly, the industrial personal computer controls the driving device to drive the portal frame to move along the front-back direction through the driving signal, meanwhile, the industrial personal computer obtains the input displacement of the portal frame, the driving device obtains the actual displacement of the portal frame, and if the actual displacement of the end part of the portal frame is not equal to the input displacement, the industrial personal computer controls the driving device to adjust the relative position between the driving device and the end part of the portal frame along the front-back direction so as to ensure that the input displacement of the end part of the portal frame is equal to the final actual displacement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a machine tool for compensating a gantry dual-drive motion deviation provided by the present invention;
FIG. 2 is a schematic structural view of portion A of FIG. 1;
FIG. 3 is an enlarged view of the connection of the gantry and the driving device in FIG. 2;
FIG. 4 is a schematic structural diagram of the mobile platform shown in FIG. 3;
wherein the content of the first and second substances,
1-bottom plate, 2-portal frame, 3-driving device, 31-moving platform, 311-moving frame, 3111-compensation groove, 3112-placing groove, 312-compensation block, 313-piezoelectric ceramic, 314-flexible hinge, 32-grating guide rail and 4-industrial personal computer;
the arrows in fig. 1 indicate the transmission of information and signals.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 4, fig. 1 is a schematic view of a machine tool for compensating a gantry dual-drive motion deviation according to the present invention; FIG. 2 is a schematic structural view of portion A of FIG. 1; FIG. 3 is an enlarged view of the connection of the gantry and the driving device in FIG. 2; FIG. 4 is a schematic structural diagram of the mobile platform shown in FIG. 3; .
The utility model provides a compensate longmen two lathe that drive motion deviation, as shown in figure 1 and figure 2, this lathe includes: the device comprises a bottom plate 1, a portal frame 2, two driving devices 3 and an industrial personal computer 4.
The base plate 1 serves to fixedly support the two driving devices 3, and the base plate 1 is preferably made of marble material for vibration damping.
The portal frame 2 is arched, and two ends of the portal frame are respectively connected with the two driving devices 3 so as to drive the portal frame 2 to move along the front-back direction through the driving devices 3; and the cross beam of the portal frame 2 can be provided with components such as an industrial camera and the like so as to realize the functions of monitoring production operation and the like.
The two driving devices 3 are arranged in parallel, so that two ends of the portal frame 2 can move along the same linear direction, and each driving device 3 is used for driving the end part of the portal frame 2 to move along the front-back direction, wherein the driving devices 3 can drive the portal frame 2 to move along the front-back direction together with the portal frame, and can also drive the portal frame 2 to move along the front-back direction relative to the driving devices 3, namely, the driving devices 3 can adjust the relative positions between the driving devices and the end part of the portal frame 2 along the front-back direction; in addition, the driving device 3 is also used for acquiring the input displacement and the actual displacement of the end part of the gantry 2.
The industrial personal computer 4 can be arranged at the bottom plate 1 or a position outside the bottom plate 1, has three main functions, and is used for sending a driving signal to the driving device 3 to enable the driving device 3 to drive the end part of the portal frame 2 to move along the front-back direction; the second is used for obtaining the information of the input displacement and the information of the actual displacement of the end part of the portal frame 2 and calculating the displacement deviation of the end part of the portal frame 2; and thirdly, the displacement deviation information is sent to the driving device 3, so that the driving device 3 adjusts the relative position between the driving device and the end part of the portal frame 2 along the front-back direction according to the distance information and the direction information in the displacement deviation information, and further the input displacement of the end part of the portal frame 2 is equal to the final actual displacement.
It should be noted that the input displacement refers to a distance detected by the driving device 3 after receiving the driving signal and moving together with the end of the gantry 2, and the manner in which the driving device 3 detects the input displacement is referred to below, and will not be described in detail herein; theoretically, the input displacement of the end of the gantry 2 should always be equal to the actual displacement, but in fact, the input displacement and the actual displacement are not always equal, so the difference between the two is calculated to obtain the displacement deviation.
Therefore, the machine tool can accurately control the actual displacement of the portal frame 2, and further can accurately regulate and control the position of the portal frame 2, so that high-precision production and processing operation by the machine tool is realized; in addition, because the actual displacement volume at portal frame 2 both ends all can keep unanimous with the input displacement volume, consequently, the crossbeam of portal frame 2 can not appear deforming, and drive arrangement 3 also can not suffer destruction, and then has avoided the condition that the precision of production operation reduces gradually.
In other words, the core of the present application is two: firstly, the relative position of the end part of the gantry 2 and the driving device 3 can be adjusted, so that the input displacement of the end part of the gantry 2 is equal to the final actual displacement; but two ends of the portal frame 2 are respectively provided with a driving device 3 to ensure the movement accuracy of the portal frame 2 and realize the high-precision production operation of the machine tool.
The following specific examples are given here for the structural configuration of the drive device 3:
in a first embodiment, as shown in fig. 2 and 3, the driving device 3 comprises: a moving platform 31, a linear motor (not shown) and a grating guide 32.
The moving platform 31 is connected with the end part of the gantry 2 and is matched with the grating guide rail 32, on one hand, the moving platform 31 is used for adjusting the position between the moving platform and the end part of the gantry 2 along the front-back direction according to the displacement deviation amount, and on the other hand, the moving platform can move along the grating guide rail 32 under the driving of the linear motor, so that the gantry 2 is driven to move along the front-back direction.
The linear motor is connected with the moving platform 31, when receiving a driving signal, the linear motor is started and drives the moving platform 31 to move along the grating guide rail 32 in the front-back direction, and in addition, the linear motor is also used for obtaining the input displacement of the end part of the portal frame 2 and sending the input displacement information to the industrial personal computer 4. Specifically, the linear motor has a stroke recorder for recording the displacement output quantity thereof, wherein the stroke recorder belongs to the prior art and is not unfolded, and since the linear motor drives the moving platform 31 to move together with the end of the gantry 2, the displacement output quantity recorded by the stroke recorder is the input displacement quantity of the end of the gantry 2.
The grating guide rail 32 is arranged along the front-back direction, and the grating guide rail 32 mainly includes a grating sensor and a linear guide rail arranged along the front-back direction, and preferably, the grating sensor is specifically a grating ruler. The linear guide rail is matched with the moving platform 31 so that the moving platform 31 can move along the front and back directions; the grating sensor is used for detecting the actual displacement of the moving platform 31, and since the linear motor drives the moving platform 31 and the end part of the gantry 2 to move together, the actual displacement of the moving platform 31 detected by the grating sensor is the actual displacement of the end part of the gantry 2, and the actual displacement information is sent to the industrial personal computer 4.
It should be noted that the detection accuracy of the grating sensors such as the grating ruler can reach the micron level of 0.5um and 1um, so as to accurately obtain the actual displacement of the mobile platform 31 to accurately adjust the relative position between the end of the gantry 2 and the mobile platform 31; before the relative position between the moving platform 31 and the end of the gantry 2 is adjusted, the actual displacement of the moving platform 31 is the actual displacement of the end of the gantry 2.
It should be noted that the displacement input amount is theoretical data calculated by the stroke recorder according to an operating parameter (such as power-on time) of the linear motor, and the actual displacement amount is actual data of the position of the moving platform 31 on the linear guide rail detected by the grating sensor.
The following specific examples are given here for the structural configuration of the mobile platform 31 in the above-described embodiment:
in a second embodiment, as shown in fig. 3 and 4, the mobile platform 31 comprises: a moving frame 311, a compensating block 312 and a piezoelectric ceramic 313.
The bottom of the moving frame 311 is matched with the linear guide rail of the grating guide rail 32, wherein the structural configurations of the bottom of the moving frame 311 and the linear guide rail can refer to the prior art, and the structure is not improved; the top of the moving frame 311 is provided with a compensating groove 3111 and a placing groove 3112 in sequence from front to back.
The compensating block 312 is disposed in the compensating groove 3111, and the top of the compensating block 312 is fixedly connected to the end of the gantry 2, wherein the groove width of the compensating groove 3111 along the front-back direction is greater than the length of the compensating block 312 along the front-back direction, so that the compensating block 312 has a freedom degree of movement along the front-back direction in the compensating groove 3111.
The piezoelectric ceramics 313 is arranged in the placing groove 3112, the output end of the piezoelectric ceramics 313 extends from the placing groove 3112 to the compensation groove 3111 and is connected with the compensation block 312, the piezoelectric ceramics 313 is electrically connected with the industrial personal computer 4 and receives displacement deviation information, and converts an electric signal corresponding to the displacement deviation information into mechanical energy, the mechanical energy is represented in a mode that the output end of the piezoelectric ceramics 313 moves, that is, after the piezoelectric ceramics 313 receives the displacement deviation information, the output end of the piezoelectric ceramics 313 generates displacement along the front-back direction, so that the compensation block 312 moves along the front-back direction in the compensation groove 3111, and adjustment of the relative position between the end part of the portal frame 2 and the movable frame 311 is further achieved.
It should be noted that, for the present embodiment, the compensation groove 3111 is preferably communicated with the placing groove 3112 to simplify the structural design of the output end of the piezoelectric ceramic 313; the compensating groove 3111 may be provided behind the placement groove 3112, and the piezoelectric ceramic 313 may drive the compensating block 313 to move in the compensating groove 3111 in the front-rear direction.
It can be understood that if the width of the compensation groove 3111 in the left-right direction is greater than the length of the compensation block 312 in the left-right direction, the two ends of the gantry 2 are easy to shake in the left-right direction, but if the width of the compensation groove 3111 in the left-right direction is equal to the length of the compensation block 312 in the left-right direction, the compensation block 312 will be subjected to a great friction force during moving in the front-back direction relative to the compensation groove 3111, and it is difficult to move the compensation block 312 in the compensation groove 3111 by a distance corresponding to the displacement deviation, so as to avoid the above situation, the following improvement is made on the basis of the third embodiment:
in the fourth embodiment, as shown in fig. 4, the compensating block 312 is connected to the compensating groove 3111 through a flexible hinge 314, wherein the flexible hinge 314 is extended in the left-right direction such that one end of the flexible hinge 314 is connected to a sidewall of the compensating block 312 and the other end is connected to a sidewall of the compensating groove 3111, so that the compensating block 312 can move only in the front-rear direction in the compensating groove 3111.
Preferably, the flexible hinge 314 is a straight beam flexible hinge, wherein the straight beam flexible hinge has high rigidity in the extending direction (i.e. the left and right bearing direction) and is not easily deformed, so as to limit the compensation block 312 from moving in the compensation groove 3111 in the left and right direction; and is easily elastically deformed in a direction perpendicular to the extending direction of the straight beam type flexible hinge (i.e., the front and rear working directions), thereby facilitating the movement of the compensating block 312 in the compensating groove 3111 in the front and rear directions.
As a further preference, as shown in fig. 4, four straight beam type flexible hinges are provided and are respectively connected to four portions of the compensation block 312 in four directions of left front, left rear, right front and right rear to ensure the stability of the movement of the compensation block 312 in the compensation groove 3111.
The following specific embodiments are given for the structural configuration of the mobile platform 31:
in a fifth embodiment, as shown in fig. 4, the front wall of the compensating groove 3111 is further provided with a displacement sensor (not shown), the displacement sensor is used to detect the distance between the compensating block 312 and the front wall of the compensating groove 3111, and transmits the distance information to the industrial personal computer 4, so that the industrial personal computer 4 calculates the relative displacement of the end part of the gantry 2 relative to the movement of the moving platform 31 according to the distance and the initial distance between the compensation block 312 and the front wall of the compensation groove 3111 when not acted by the piezoelectric ceramics 313, so as to determine whether the actual displacement of the end of the gantry 2 is equal to the input displacement, and if the relative displacement is not equal to the displacement deviation, the position of the compensating block 312 in the compensating slot 3111 along the front-back direction is continuously adjusted according to the difference between the relative displacement and the displacement deviation (i.e. the deviation to be compensated) until the deviation to be compensated is zero, so that the input displacement at the end of the gantry 2 is equal to the final actual displacement. Preferably, the displacement sensor is a capacitance sensor electrically connected to the industrial personal computer 4.
It is understood that, if the compensation groove 3111 is located behind the placement groove 3112, it is preferable to provide the above-mentioned displacement sensor at the rear wall of the compensation groove 3111 so that the output end of the piezoelectric ceramics 313 is connected to the compensation block 312.
In addition to the above, in order to transmit signals and information to the industrial personal computer 4, components such as the driving device 3 and the linear motor may be electrically connected to the industrial personal computer 4 through a data line to implement data exchange, or may be implemented through a wireless communication technology (e.g., a ZigBee wireless communication technology).
It should be noted that, in the description of the present invention, the directions or positional relationships indicated by "front", "rear", "left", and "right" are used based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but not for limiting the designated elements or parts to have a specific direction, and thus, should not be construed as limiting the present invention.
It is right above the utility model provides a compensation longmen is two to be driven the lathe of motion deviation and has been introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A machine tool for compensating gantry double-drive motion deviation is characterized by comprising:
a base plate (1);
an arched gantry (2);
the two driving devices (3) are arranged on the bottom plate (1) and are used for driving the portal frame (2) to move along the front-back direction and acquiring the actual displacement and the input displacement of the end part of the portal frame (2);
and the industrial personal computer (4) is used for sending a driving signal to the driving device (3), acquiring the actual displacement and the input displacement of the end part of the portal frame (2) from the driving device (3), calculating the displacement deviation amount of the end part of the portal frame (2), and sending displacement deviation amount information to the driving device (3).
2. Machine tool according to claim 1, characterized in that all the drive means (3) comprise:
the moving platform (31) is connected with the end part of the portal frame (2), wherein the moving platform (31) is used for adjusting the relative position between the moving platform and the end part of the portal frame (2) along the front-back direction according to the displacement deviation amount;
a grating guide rail (32) which is matched with the moving platform (31) and is used for detecting the actual displacement of the moving platform (31);
and the linear motor is connected with the moving platform (31) and is used for driving the moving platform (31) to move along the grating guide rail (32) according to a driving signal.
3. Machine tool according to claim 2, characterized in that said mobile platform (31) comprises:
the grating guide rail (32) is matched with the bottom of the moving frame (311), and a compensation groove (3111) and a placing groove (3112) are sequentially formed in the top of the moving frame (311) from front to back;
the compensation block (312) is arranged in the compensation groove (3111) and used for supporting and connecting the end part of the portal frame (2);
the piezoelectric ceramic (313) is arranged in the placing groove (3112) and is electrically connected with the industrial personal computer (4), wherein the output end of the piezoelectric ceramic (313) extends from the placing groove (3112) into the compensation groove (3111) and is fixedly connected with the compensation block (312) so as to drive the compensation block (312) to move in the compensation groove (3111) along the front-back direction.
4. The machine tool according to claim 3, wherein the compensating block (312) is connected to the compensating groove (3111) by a flexible hinge (314), wherein the flexible hinge (314) extends in a left-right direction for movement of the compensating block (312) in a front-back direction within the compensating groove (3111).
5. Machine tool according to claim 4, characterized in that the flexible hinge (314) is in particular a straight beam-type flexible hinge.
6. Machine tool according to claim 5, characterised in that four of said flexible hinges of the straight beam type are provided.
7. Machine tool according to any one of claims 3 to 6, characterized in that said mobile platform (31) further comprises a displacement sensor arranged on the front wall of said compensation slot (3111) for detecting the distance between said compensation block (312) and said front wall of said compensation slot (3111).
8. Machine tool according to claim 7, characterized in that the displacement sensor is in particular a capacitive sensor.
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| CN201921169045.6U CN210209409U (en) | 2019-07-23 | 2019-07-23 | Machine tool for compensating gantry double-drive motion deviation |
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| CN201921169045.6U CN210209409U (en) | 2019-07-23 | 2019-07-23 | Machine tool for compensating gantry double-drive motion deviation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253308A (en) * | 2019-07-23 | 2019-09-20 | 广东工业大学 | A kind of double lathes and method for driving movement warp in compensation gantry |
| CN114682801A (en) * | 2022-05-05 | 2022-07-01 | 爱司凯科技股份有限公司 | Moving beam dual-power driving system and driving method based on freedom degree release mechanism |
| CN116079115A (en) * | 2023-02-22 | 2023-05-09 | 杭州开兰重工机械有限公司 | High-rigidity heavy machine tool |
-
2019
- 2019-07-23 CN CN201921169045.6U patent/CN210209409U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253308A (en) * | 2019-07-23 | 2019-09-20 | 广东工业大学 | A kind of double lathes and method for driving movement warp in compensation gantry |
| CN114682801A (en) * | 2022-05-05 | 2022-07-01 | 爱司凯科技股份有限公司 | Moving beam dual-power driving system and driving method based on freedom degree release mechanism |
| CN116079115A (en) * | 2023-02-22 | 2023-05-09 | 杭州开兰重工机械有限公司 | High-rigidity heavy machine tool |
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