CN212145322U - Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece - Google Patents
Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece Download PDFInfo
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- CN212145322U CN212145322U CN202020612306.3U CN202020612306U CN212145322U CN 212145322 U CN212145322 U CN 212145322U CN 202020612306 U CN202020612306 U CN 202020612306U CN 212145322 U CN212145322 U CN 212145322U
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Abstract
The utility model discloses an automatic compensation mechanism of an ultra-precision machine tool suitable for large-size workpieces, which comprises a numerical control system, a base, a workbench, a frame and a main spindle box; the rack is provided with an X, Y shaft transmission device; a Z-axis transmission device is arranged on the main spindle box; the frame comprises a left bridge column, a right bridge column and a cross beam; corresponding guide rail pairs and ball screw pairs are arranged on the bridge columns, corresponding middle slide carriages are erected on the corresponding guide rail pairs through corresponding three-cavity static pressure slide block sets, and the ball screw pairs are in transmission with the corresponding middle slide carriages; the left end of the cross beam is fixedly connected with the left middle slide carriage, the top surface of the right middle slide carriage is provided with a plurality of linear rolling guide rail pairs with band brakes, and the right end of the cross beam is connected with the right middle slide carriage through the linear rolling guide rail pairs; corresponding pressure sensors are arranged on the three-cavity static pressure sliding block groups, the output ends of the sensors are connected with the corresponding input ends of numerical control, and the corresponding output ends of the numerical control are connected with the corresponding input ends of the band-type brake control devices; the left and right screw pairs are synchronous. The requirement of finish machining of large parts is met, the structure is simple, and the cost is low.
Description
Technical Field
The utility model relates to a lathe technical field, especially an automatic compensation mechanism of ultra-precision machine tool suitable for jumbo size work piece.
Background
The influence of expansion with heat and contraction with cold on the machining precision of the large structural part of the machine tool during low-precision machining can be ignored under the general condition, and the expansion with heat and contraction with cold of the large structural part of the machine tool with high precision requirement and smaller machined part size can be ignored under the general condition. However, in a machine tool having a large workpiece size and a high machining accuracy requirement, the influence of thermal expansion and contraction on the accuracy of the large structural member of the machine tool must be considered, because the overall size of the large structural member of the machine tool used when the workpiece size is large is also large, and the magnitude of the thermal expansion and contraction is also large to an extent that cannot be ignored.
The machine tool in the prior art has various technical solutions with larger machined part size and high machining precision requirement, but the machine tool is mainly divided into two types, wherein one type is optimized by the material of a large structural part, and the other type is automatically compensated by the relatively complex structural design for expansion caused by heat and contraction caused by cold.
The automatic compensation mechanism of the ultra-precision machine tool applicable to large-size workpieces in the prior art can be used certainly, but the structure is relatively complex, the cost is high, and the using effect is not ideal.
SUMMERY OF THE UTILITY MODEL
For overcoming the defects of the prior art, the utility model provides an automatic compensation mechanism which has simple structure and low cost and is suitable for an ultraprecise machine tool of a large-size workpiece.
The utility model discloses a reach the technical scheme that above-mentioned technical purpose adopted and be: an automatic compensation mechanism suitable for an ultra-precision machine tool of a large-size workpiece is disclosed, wherein the machine tool comprises a numerical control system, a base, a workbench arranged on the top surface of the base, a rack erected on the base, and a main spindle box erected above the workbench through the rack; an X-axis transmission device for driving the spindle box to translate left and right and a Y-axis transmission device for driving the spindle box to translate front and back are arranged on the rack; a Z-axis transmission device for driving the main shaft to move up and down is arranged on the main shaft box; the frame comprises a left bridge column, a right bridge column and a cross beam which are all cuboid; the left bridge pillar is provided with a left guide rail pair and a left ball screw pair, the left middle slide carriage is erected on the left guide rail pair through a left three-cavity static pressure slide block group, and the left ball screw pair is in transmission connection with the left middle slide carriage; a right guide rail pair and a right ball screw pair are arranged on the right bridge pillar, a right middle slide carriage is erected on the right guide rail pair through a right three-cavity static pressure sliding block set, and the right ball screw pair is in transmission connection with the right middle slide carriage; the left end of the cross beam is fixedly connected with the left middle slide carriage, the top surface of the right middle slide carriage is provided with a plurality of linear rolling guide rail pairs with band-type brakes along the left-right direction, and the right end of the cross beam is connected with the right middle slide carriage through the plurality of linear rolling guide rail pairs with band-type brakes; the top surface of the beam is provided with a beam guide rail pair, and the spindle box is connected with the beam in a guiding way through the beam guide rail pair; the left three-cavity static pressure sliding block group and the right three-cavity static pressure sliding block group are respectively provided with a corresponding pressure sensor, the signal output end of each pressure sensor is in signal connection with the corresponding input end of the numerical control system, and the corresponding signal output end of the numerical control system is in signal connection with the input end of a corresponding band-type brake control device of the linear rolling guide rail pair with the band-type brake; the left ball screw pair and the right ball screw pair are in synchronous transmission.
The utility model has the advantages that:
due to the adoption of the structure, the ultra-precision machining of a large workpiece can be met, and the structure is simple and the cost is low.
Drawings
The present invention will be further explained with reference to the drawings and examples. Wherein:
fig. 1 is a schematic view of the present invention;
fig. 2 is a schematic illustration of the present invention with the split omitted.
The reference numbers in the drawings illustrate the following: the three-cavity static pressure slide block comprises a beam guide rail pair 1, a spindle box 2, a right middle slide carriage 3, a right three-cavity static pressure slide block group 4, a right ball screw pair 5, a right guide rail pair 6, a right bridge column 7, a base 8, a linear rolling guide rail pair 9 with a band-type brake, a workbench 10, a left guide rail pair 11, a left ball screw pair 12, a left three-cavity static pressure slide block group 13, a left bridge column 14, a left middle slide carriage 15, a cross beam 16 and a pressure sensor 17
Detailed Description
The embodiment of the utility model, as shown in fig. 1 and fig. 2, an automatic compensation mechanism for an ultra-precision machine tool suitable for large-size workpieces, the machine tool comprises a numerical control system, a base 8, a workbench 10 arranged on the top surface of the base 8, a frame arranged on the base 8, and a main spindle box 2 arranged above the workbench 10 through the frame; an X-axis transmission device for driving the spindle box 2 to translate left and right and a Y-axis transmission device for driving the spindle box 2 to translate front and back are arranged on the rack; a Z-axis transmission device for driving the main shaft to move up and down is arranged on the main shaft box 2; the method is characterized in that: the frame comprises a left bridge column 14, a right bridge column 7 and a cross beam 16 which are all cuboid; a left guide rail pair 11 and a left ball screw pair 12 are arranged on the left bridge pillar 14, a left middle slide carriage 15 is erected on the left guide rail pair 11 through a left three-cavity static pressure slide block set 13, and the left ball screw pair 12 is in transmission connection with the left middle slide carriage 15; a right guide rail pair 6 and a right ball screw pair 5 are arranged on the right bridge pillar 7, the right middle slide carriage 3 is erected on the right guide rail pair 6 through a right three-cavity static pressure slide block group 4, and the right ball screw pair 5 is in transmission connection with the right middle slide carriage 3; the left end of a cross beam 16 is fixedly connected with a left middle slide carriage 15, a plurality of linear rolling guide rail pairs 9 with band-type brakes are arranged on the top surface of the right middle slide carriage 3 along the left-right direction, and the right end of the cross beam 16 is connected with the right middle slide carriage 3 through the plurality of linear rolling guide rail pairs 9 with band-type brakes; the top surface of the beam 16 is provided with a beam guide rail pair 1, and the spindle box 2 is connected with the beam 16 in a guiding way through the beam guide rail pair 1; the left three-cavity static pressure sliding block set 13 and the right three-cavity static pressure sliding block set 4 are respectively provided with a corresponding pressure sensor 17, the signal output end of the pressure sensor 17 is in signal connection with the corresponding input end of the numerical control system, and the corresponding signal output end of the numerical control system is in signal connection with the input end of the corresponding band-type brake control device of the linear rolling guide rail pair 9 with the band-type brake; the left ball screw pair 12 and the right ball screw pair 5 are in synchronous transmission.
The principle of the utility model is as follows: the cross beam 16 is arranged on the linear rolling guide rail pair 9 with the band-type brake of the left middle slide carriage 15 and the right middle slide carriage 3, the right side of the cross beam 16 is connected with the right middle slide carriage 3 through the linear rolling guide rail pair 9 with the band-type brake, the left three-cavity static pressure sliding block set 13 and the right three-cavity static pressure sliding block set 4 are respectively arranged on the left middle slide carriage 15 and the right middle slide carriage 3, and form a forward and lateral movement guiding effect with the left guide rail pair 11 on the left bridge pillar 14 and the right guide rail pair 6 on the right bridge pillar 7.
The left ball screw pair 12 and the right ball screw pair 5 are respectively fixed on the left bridge pillar 14 and the right bridge pillar 7 and are used for synchronously driving the cross beam 16 to move.
Because the left side of the cross beam 16 is fixed, the left three-cavity static pressure slider group 13, the right three-cavity static pressure slider group 4, the left ball screw pair 12 and the right ball screw pair 5 are both guided forwards and laterally and fixed on the left bridge post 14 and the right bridge post 7, when the cross beam 16 expands with heat and contracts with cold, the cross beam 16 cannot expand with heat and contract with cold to generate displacement, and then the compensation displacement can be only carried out in the axial direction through the linear rolling guide rail pair 9 with the band-type brake; the loosening and the clamping of the rolling guide rail block with the band-type brake on the linear rolling guide rail pair 9 with the band-type brake are controlled by the signal feedback of the pressure sensors 17 corresponding to the left three-cavity static pressure sliding block set 13 and the right three-cavity static pressure sliding block set 4; when the beam 16 expands with heat and contracts with cold to a certain degree, the pressures of the hydrostatic guideway in the forward direction and the lateral direction can be changed greatly, the pressure sensors 17 on the left three-cavity hydrostatic slider group 13 and the right three-cavity hydrostatic slider group 4 are converted into voltage signals according to the pressure changes and then sent to the numerical control system, the numerical control system judges whether to feed back the rolling guideway block with the band-type brake on the linear rolling guideway pair 9 with the band-type brake according to the time measurement of voltage fluctuation, thereby realizing that each part of the whole machine plays a role in automatic compensation in the direction of the beam 16 due to the expansion with heat and contraction with cold, and the hydrostatic guideway and the lead screw can not be damaged due to the expansion with heat and contraction with cold of the whole machine. The ultra-precision machining of large workpieces can be met, the structure is simple, and the cost is low.
Claims (1)
1. An automatic compensation mechanism suitable for an ultra-precision machine tool of a large-size workpiece is disclosed, wherein the machine tool comprises a numerical control system, a base, a workbench arranged on the top surface of the base, a rack erected on the base, and a main spindle box erected above the workbench through the rack; an X-axis transmission device for driving the spindle box to translate left and right and a Y-axis transmission device for driving the spindle box to translate front and back are arranged on the rack; a Z-axis transmission device for driving the main shaft to move up and down is arranged on the main shaft box; the method is characterized in that: the frame comprises a left bridge column, a right bridge column and a cross beam which are all cuboid; the left bridge pillar is provided with a left guide rail pair and a left ball screw pair, the left middle slide carriage is erected on the left guide rail pair through a left three-cavity static pressure slide block group, and the left ball screw pair is in transmission connection with the left middle slide carriage; a right guide rail pair and a right ball screw pair are arranged on the right bridge pillar, a right middle slide carriage is erected on the right guide rail pair through a right three-cavity static pressure sliding block set, and the right ball screw pair is in transmission connection with the right middle slide carriage; the left end of the cross beam is fixedly connected with the left middle slide carriage, the top surface of the right middle slide carriage is provided with a plurality of linear rolling guide rail pairs with band-type brakes along the left-right direction, and the right end of the cross beam is connected with the right middle slide carriage through the plurality of linear rolling guide rail pairs with band-type brakes; the top surface of the beam is provided with a beam guide rail pair, and the spindle box is connected with the beam in a guiding way through the beam guide rail pair; the left three-cavity static pressure sliding block group and the right three-cavity static pressure sliding block group are respectively provided with a corresponding pressure sensor, the signal output end of each pressure sensor is in signal connection with the corresponding input end of the numerical control system, and the corresponding signal output end of the numerical control system is in signal connection with the input end of a corresponding band-type brake control device of the linear rolling guide rail pair with the band-type brake; the left ball screw pair and the right ball screw pair are in synchronous transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020612306.3U CN212145322U (en) | 2020-04-22 | 2020-04-22 | Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020612306.3U CN212145322U (en) | 2020-04-22 | 2020-04-22 | Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece |
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| CN212145322U true CN212145322U (en) | 2020-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360555A (en) * | 2020-04-22 | 2020-07-03 | 机械科学研究总院海西（福建）分院有限公司 | Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece |
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2020
- 2020-04-22 CN CN202020612306.3U patent/CN212145322U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360555A (en) * | 2020-04-22 | 2020-07-03 | 机械科学研究总院海西（福建）分院有限公司 | Automatic compensation mechanism of ultra-precision machine tool suitable for large-size workpiece |
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