CN102445340A - Loading running-in device for ball screw pair and running-in testing method thereof - Google Patents

Loading running-in device for ball screw pair and running-in testing method thereof Download PDF

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Publication number
CN102445340A
CN102445340A CN2011102925145A CN201110292514A CN102445340A CN 102445340 A CN102445340 A CN 102445340A CN 2011102925145 A CN2011102925145 A CN 2011102925145A CN 201110292514 A CN201110292514 A CN 201110292514A CN 102445340 A CN102445340 A CN 102445340A
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China
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running
ball screw
ball
screw assembly
magnetic powder
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CN2011102925145A
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Chinese (zh)
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CN102445340B (en
Inventor
于宙
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优励聂夫(南京)科技有限公司
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Abstract

The invention discloses a loading running-in device for a ball screw pair and a running-in testing method thereof, which belong to the technical field of running-in test of ball screw pairs. In the running-in device, a main spindle box and a tail seat are used for fixing a ball screw pair; a positioning plate is fixedly connected with a ball nut of the ball screw pair; automatic reversing running-in of the ball screw pair is realized by using a limit switch and a limit switch triggering rod; a magnetic powder brake is used for applying an axial load to the ball screw pair; a reversing mechanism is used for controlling positive and negative rotation of a tip; and a control cabinet is used for controlling other devices to work. The running-in test method comprises the following steps of: loading the ball screw pair; fixing the ball nut; performing a running-in procedure; parking; and testing performance parameters and unloading the ball screw pair. In the invention, the axial load is applied to the ball screw pair by using the magnetic powder brake, so that the delivery performance of the ball screw pair is enhanced; and the magnitude of the loaded load is easy to control, so that temperature rise of the ball screw pair after running-in can be tested accurately and conveniently.

Description

A kind of ball screw assembly, loads running in machine and running-in method of testing thereof
Technical field
The present invention relates to a kind of test unit and method of testing thereof of ball screw assembly,, more particularly, relate to a kind of ball screw assembly, loading running in machine and running-in method of testing thereof that applies axial load through magnetic powder brake.
Background technology
Running-in is one of operation of ball screw assembly, production, all need carry out running-in before every suit ball screw assembly, dispatches from the factory, to improve its performance.Ball screw assembly, running-in in the past all is under the situation of zero load, to carry out; Under this situation; Can't learn the temperature rise of ball screw assembly, after the running-in; The ball-recirculation reversing device whether firmly, come off, whether O-ring seal firm, whether distortion and dislocation and the dynamic unloaded pretension torque of ball screw assembly, still meet situation such as drawing requirement.
One Chinese patent application number is 91220060.X; Invention and created name is: ball screw assembly, running-in and fatigue tester; This application case is made up of Hydraulic Station, controller, reverse mechanism, oil motor, charger, leading screw, nut, and oil motor is connected with leading screw, reverse mechanism respectively, and controller is connected with Hydraulic Station, reverse mechanism, charger respectively; Charger is a fluid pressure type oil cylinder with two oil pockets; Constitute by cylinder body, piston, gland bonnet, be arranged on the leading screw, and between two nuts on the ball screw assembly.This application case is converted into the internal force of system with plus load, makes and bears an axial load between nut and leading screw, just bears pulling force on one section leading screw between two nuts; When rotational lead screw, nut are done to move again, there is the alternation contact stress on nut and the leading screw raceway; Realized the life-span of the life-span of testing machine greater than ball screw assembly; But guaranteed the completion of test one-time continuous, but the deficiency that this application case exists is: the fluid pressure type cylinder structure is complicated, and the frequent back and forth movement of oil cylinder; Easy abrasion causes leakage of oil and influences the operate as normal of equipment.
At present, a lot of ball screw assembly, general performance tests, its ball screw assembly, running-in all is under the situation of zero load, to carry out.As: Chinese patent ZL200620161148.4; Invention and created name is: high speed and precision ball screw assembly, general performance test; This application case has a base, and at base rear end and anterior front-end bearing pedestal and the rear bearing block that is provided for supporting ball screw assembly, respectively, the base front end is equipped with waits upon the clothes motor; Wait upon on the output shaft of obeying motor the shaft coupling that is connected with ball-screw is housed; There is base-mounted line slideway the both sides of front-end bearing pedestal, rear bearing block, and two line slideways are parallel with the center line of front-end bearing pedestal, rear bearing block, and two line slideways support the worktable that is connected with ball-screw nut.This tester cooperates acceleration transducer, temperature sensor, Digital Noise sensor grating chi and double-frequency laser to survey people's device and computing machine; Can accomplish the online in real time of acceleration, speed, bearing accuracy and the leading screw thermal elongation of ball screw assembly, under load condition measures; Promoted the ball screw assembly, detection means; But this tester does not apply axial load to ball screw assembly, as yet, promptly tests under the situation of zero load; Can not simulate ball screw assembly, in actual use receive force environment, so data measured can not embody the performance of ball screw assembly, exactly.
Summary of the invention
The technical matters that invention will solve
The present invention is directed to the deficiency that ball screw assembly, running-in appearance of the prior art moves under the situation of zero load; Provide a kind of ball screw assembly, to load running in machine and running-in method of testing thereof; Apply axial load to ball screw assembly, during running-in; To improve the performance of ball screw assembly,, also can conveniently record the temperature rise of ball screw assembly, after the running-in, convenient test ball-recirculation reversing device whether firmly, come off; Whether O-ring seal firm, distortion and dislocation, and whether the dynamic unloaded pretension torque of ball screw assembly, still meets situation such as drawing requirement.
Technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of ball screw assembly, of the present invention loads running in machine, comprises main spindle box, location-plate, planker, guide rail, tailstock and lathe bed, also comprises limit switch, reverse mechanism, magnetic powder brake and switch board, wherein,
ⅰ, main spindle box are fixed on an end of lathe bed, and tailstock is slidingly installed on the lathe bed and the corresponding other end in main spindle box position, and this tailstock can move on the length direction of lathe bed, and the top of main spindle box and tailstock is positioned on the same horizontal line, is used for fixing ball screw assembly;
ⅱ, planker are socketed on the guide rail, can slide at the axial direction of guide rail, and location-plate is connected with planker mutually, and this location-plate is positioned at the top of planker, and location-plate is provided with the U-shaped groove, is used for being connected mutually with the ball nut of ball screw assembly;
ⅲ, limit switch are installed in lathe bed one side through screw retention; Limit switch is provided with 2; Side near limit switch on the planker is fixed with the limit switch frizzen, through contacting of limit switch frizzen and limit switch, realizes the automatic reverse running-in of ball screw assembly;
ⅳ, magnetic powder brake are positioned at lathe bed one side; This magnetic powder brake is connected with planker mutually, and the output shaft of magnetic powder brake is meshed with spur rack, and this spur rack is fixed on the lathe bed; With axially paralleling of guide rail, magnetic powder brake is used for applying axial load to ball screw assembly;
ⅴ, the logical enough belts of reverse mechanism are connected with the belt wheel of main spindle box, the top rotation in the driving main shaft case, thus control top positive and negative rotation;
ⅵ, switch board are provided with guidance panel, and switch board is connected with other device that loads running in machine, controls other device work.
More specifically, described main spindle box is provided with chuck, through the fixing ball-screw of this chuck.The both sides of U-shaped groove are provided with threaded hole on the described location-plate, realize being fixedly connected of location-plate and ball nut through threaded hole.
A kind of ball screw assembly, of the present invention loads the running-in method of testing of running in machine, the steps include:
(A) load ball screw assembly:
Ball screw assembly, be fixed on load on top between running in machine main spindle box and the tailstock, leaning on the main spindle box end with the fixing ball-screw of chuck simultaneously, prevent ball-screw and top between relatively rotate;
(B) fixing ball nut:
Ball nut on the ball screw assembly, is fixed in the U-shaped groove of location-plate through being threaded, when making the ball-screw rotation, ball nut does not rotate together along with ball-screw and does rectilinear motion;
(C) running-in operation:
The axial force that magnetic powder brake applies during running-in is identical with the pretightning force of ball screw assembly,, and the magnitude of load of setting magnetic powder brake through the guidance panel on the switch board is 2~10Kg, and rotating speed is 50~400 r/min during running-in; And according to reciprocal running-in number of times in the accuracy class setting effective travel; Wherein, when precision is 1,2 grades, reciprocal running-in number of times >=50 in the effective travel; When precision is 3,4 grades; Reciprocal running-in number of times >=40 in the effective travel, when precision is 5,7,10 grades, reciprocal running-in number of times >=30 in the effective travel;
(D) shut-down sequence:
After treating the running-in number of times end of step (C) setting, close the control power supply of magnetic powder brake earlier, close the power supply that loads running in machine again;
(E) performance parameter test:
Performance parameter test comprises: accomplish the temperature rise test of ball nut after 1. running is stopped in half a minute, promptly cooperate survey 2 points on the cylindrical at nut, get its temperature rise maximal value; 2. recheck dynamic unloaded pretension torque, its limit deviation value should meet the requirement of drawing; 3. the ball-recirculation reversing device should be firm, do not allow to become flexible, misplace, come off or exceed the distortion of requirement; 4. O-ring seal should firm, not allow distortion and dislocation;
(F) unloading ball screw assembly:
Unclamp being threaded of location-plate and ball nut, the loading running in machine is left in the ball screw assembly, allocation and transportation through driving.
Principle of work: ball screw assembly, after assembling is accomplished, measure unloaded pretension torque before, must carry out running-in, through running-in, check the quality of assembling.In lathe uses, receive force environment in order to reach ball screw assembly,, this running-in appearance has increased the device magnetic powder brake that applies axial load to ball screw assembly.During actual the use; Ball screw assembly, is contained between main spindle box and tailstock top through the two ends center pit, is fixed up ball-screw with chuck, prevent that it from rotating at circumferencial direction at the main spindle box end; Ball nut is fixed on the location-plate; According to client's demand, ball screw assembly, is applied certain axial load, come and go the running-in official hour with certain rotating speed.
Beneficial effect
Adopt technical scheme provided by the invention, compare, have following remarkable result with existing known technology:
(1) ball screw assembly, of the present invention loads running in machine has increased the magnetic powder brake that applies axial load to ball screw assembly; Can reach ball screw assembly, and in lathe uses, receive force environment; Improve the effect of running-in greatly, can improve the performance of dispatching from the factory of ball screw assembly;
(2) magnetic powder brake of the present invention's employing loads axial load, and load with hydraulic cylinder and compare, the environmental pollution situation such as little, no leakage of oil that take up room, and the control of the size of loaded load is accurately;
(3) loading running in machine of the present invention is provided with limit switch, is used reverse mechanism, realizes control automatically through switch board, and the automaticity of running-in operation is high, and labour intensity reduces greatly, has reduced production cost;
(4) ball screw assembly, of the present invention loads the running-in method of testing of running in machine; Owing to simulated the force environment that receives in lathe uses; Make and to make things convenient for the temperature rise that accurately records ball screw assembly, after the running-in; Convenient test ball-recirculation reversing device whether firmly, come off, whether O-ring seal firm, distortion and dislocation, and whether the dynamic unloaded pretension torque of ball screw assembly, still meets situation such as drawing requirement.
Description of drawings
Fig. 1 is the synoptic diagram that a kind of ball screw assembly, of the present invention loads the running in machine front view;
The structural representation that Fig. 2 analyses and observe for A-A direction of the present invention.
Label declaration in the synoptic diagram:
The 1-main spindle box; The 2-limit switch; The 3-location-plate; The 4-planker; The 5-guide rail; The 6-tailstock; The 7-lathe bed; The 8-reverse mechanism; The 9-magnetic powder brake; The 10-switch board.
Embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with accompanying drawing.
In conjunction with Fig. 1 and Fig. 2, the present invention includes main spindle box 1, limit switch 2, location-plate 3, planker 4, guide rail 5, tailstock 6, lathe bed 7, reverse mechanism 8, magnetic powder brake 9 and switch board 10, main spindle box 1 is fixed on an end of lathe bed 7; Tailstock 6 is slidingly installed on the lathe bed 7 and the corresponding other end in main spindle box 1 position, and main spindle box 1 is positioned on the same horizontal line with the top of tailstock 6, is used for fixing ball screw assembly; Planker 4 is socketed on the guide rail 5, and location-plate 3 is connected with planker 4 mutually, and location-plate 3 is provided with the U-shaped groove; Be used for being connected mutually with the ball nut of ball screw assembly,, limit switch 2 is installed in lathe bed 7 one sides through screw retention, and limit switch 2 is provided with 2; Side near limit switch 2 on the planker 4 is fixed with the limit switch frizzen, through contacting of limit switch frizzen and limit switch 2, realizes the automatic reverse running-in of ball screw assembly; Magnetic powder brake 9 is connected with planker 4 mutually, and the output shaft of magnetic powder brake 9 is meshed with spur rack, and this spur rack is fixed on the lathe bed 7; With axially paralleling of guide rail 5; Magnetic powder brake 9 is used for applying axial load to ball screw assembly,, and reverse mechanism 8 logical enough belts are connected the top rotation in the driving main shaft case 1 with the belt wheel of main spindle box 1; Thereby control top positive and negative rotation; Switch board 10 is provided with guidance panel, and switch board 10 is connected with other device that loads running in machine, controls other device work.
Below in conjunction with embodiment the present invention is done further description.
Embodiment
The ball screw assembly, of present embodiment loads running in machine, and in an end of lathe bed 7, tailstock 6 is slidingly installed on the slide rail of lathe bed 7 main spindle box 1 through bolt; Main spindle box 1 and tailstock 6 lay respectively at the two ends of lathe bed 7, and this tailstock 6 can move on the slide rail of lathe bed 7, and main spindle box 1 is positioned on the same horizontal line with the top of tailstock 6; Ball screw assembly,, is strengthened fixing through the chuck on the main spindle box 1 between main spindle box and tailstock top through two ends center pit clamping, and planker 4 is socketed on the guide rail 5; Can slide at the axial direction of guide rail 5, on planker 4, this location-plate 3 is positioned at the top of planker 4 to location-plate 3 through screw retention; Location-plate 3 is provided with the U-shaped groove, and the both sides of this U-shaped groove are provided with threaded hole, realizes being fixedly connected of location-plate 3 and ball nut through threaded hole; Limit switch 2 is installed in lathe bed 7 one sides through screw retention, and limit switch 2 is provided with 2, and the side near limit switch 2 on the planker 4 is fixed with the limit switch frizzen; Through contacting of limit switch frizzen and limit switch 2, realize the automatic reverse running-in of ball screw assembly,, magnetic powder brake 9 is positioned at lathe bed 7 one sides; This magnetic powder brake 9 is connected with planker 4 mutually, and the output shaft of magnetic powder brake 9 is meshed with spur rack, and this spur rack is fixed on the lathe bed 7; With axially paralleling of guide rail 5, magnetic powder brake 9 is used for applying axial load to ball screw assembly,, and reverse mechanism 8 logical enough belts are connected with the belt wheel of main spindle box 1; Top rotation in the driving main shaft case 1, this reverse mechanism 8 commutates through electrical control, thereby controls top positive and negative rotation; Switch board 10 is provided with guidance panel, and switch board 10 is connected with other device that loads running in machine, controls other device work.
Select for use an interior circulating ball lead screw pair of being furnished with O-ring seal to carry out the running-in test in the present embodiment, the steps include:
(A) load ball screw assembly: ball screw assembly, be fixed on load on top between running in machine main spindle box 1 and the tailstock 6, leaning on main spindle box 1 end with the fixing ball-screw of chuck simultaneously, prevent ball-screw and top between relatively rotate;
(B) fixing ball nut: the ball nut on the ball screw assembly, is fixed in the U-shaped groove of location-plate 3 through being threaded, when making the ball-screw rotation, ball nut does not rotate together along with ball-screw and does rectilinear motion;
(C) running-in operation: the axial force that magnetic powder brake 9 applies during running-in is identical with the pretightning force of ball screw assembly; The present embodiment pretightning force requires to be 4Kg; The magnitude of load of setting magnetic powder brake 9 through the guidance panel on the switch board 10 is 4 Kg; Speed setting is 150 r/min during running-in, and requirement of accuracy class of circulating ball lead screw pair is 2 grades in this, and reciprocal running-in number of times is set at 60 times in the effective travel;
When the present invention is applied to other ball screw assembly, running-in; Reciprocal running-in number of times can be selected to set according to accuracy class in the concrete effective travel: when precision is 1,2 grades; Reciprocal running-in number of times >=50 in the effective travel, when precision is 3,4 grades, reciprocal running-in number of times >=40 in the effective travel; When precision is 5,7,10 grades, reciprocal running-in number of times >=30 in the effective travel;
(D) shut-down sequence: after treating the running-in number of times end of step (C) setting, close the control power supply of magnetic powder brake 9 earlier, close the power supply that loads running in machine again;
(E) performance parameter test: performance parameter test comprises: accomplish the temperature rise test of ball nut after 1. running is stopped in half a minute, promptly cooperate survey 2 points on the cylindrical at nut, get its temperature rise maximal value, present embodiment is measured as 6 ℃; 2. recheck dynamic unloaded pretension torque, its limit deviation value should meet the requirement of drawing; 3. the ball-recirculation reversing device should be firm, do not allow to become flexible, misplace, come off or exceed the distortion of requirement; 4. O-ring seal should firm, not allow distortion and dislocation;
(F) unloading ball screw assembly: unclamp being threaded of location-plate 3 and ball nut, through driving ball screw assembly, is allocated and transported and left the loading running in machine.
Present embodiment has increased the magnetic powder brake that applies axial load to ball screw assembly; Can reach ball screw assembly, and in lathe uses, receive force environment; Improved the effect of running-in greatly, can improve the performance of dispatching from the factory of ball screw assembly,, and the automaticity of running-in operation is high; Labour intensity reduces greatly, has reduced production cost; Adopt the running-in method of testing of present embodiment; Owing to simulated the force environment that receives in lathe uses; Make and to make things convenient for the temperature rise that accurately records ball screw assembly, after the running-in; Convenient test ball-recirculation reversing device whether firmly, come off, whether O-ring seal firm, distortion and dislocation, and whether the dynamic unloaded pretension torque of ball screw assembly, still meets situation such as drawing requirement.
Below schematically the present invention and embodiment thereof are described, this description does not have restricted, and shown in the accompanying drawing also is one of embodiment of the present invention, and practical structure is not limited thereto.So,, under the situation that does not break away from the invention aim,, all should belong to protection scope of the present invention without creationary frame mode similar and the embodiment of designing with this technical scheme if those of ordinary skill in the art is enlightened by it.

Claims (4)

1. a ball screw assembly, loads running in machine; Comprise main spindle box (1), location-plate (3), planker (4), guide rail (5), tailstock (6) and lathe bed (7); It is characterized in that; Also comprise limit switch (2), reverse mechanism (8), magnetic powder brake (9) and switch board (10), wherein
ⅰ, main spindle box (1) are fixed on an end of lathe bed (7); Tailstock (6) is slidingly installed in lathe bed (7) and goes up and the corresponding other end in main spindle box (1) position; This tailstock (6) can move on the length direction of lathe bed (7); Main spindle box (1) and the top of tailstock (6) are positioned on the same horizontal line, are used for fixing ball screw assembly;
ⅱ, planker (4) are socketed on the guide rail (5); Can slide at the axial direction of guide rail (5); Location-plate (3) is connected with planker (4) mutually; This location-plate (3) is positioned at the top of planker (4), and location-plate (3) is provided with the U-shaped groove, is used for being connected mutually with the ball nut of ball screw assembly;
ⅲ, limit switch (2) are installed in lathe bed (7) one sides through screw retention; Limit switch (2) is provided with 2; The side that planker (4) is gone up near limit switch (2) is fixed with the limit switch frizzen; Through contacting of limit switch frizzen and limit switch (2), realize the automatic reverse running-in of ball screw assembly;
ⅳ, magnetic powder brake (9) are positioned at lathe bed (7) one sides; This magnetic powder brake (9) is connected with planker (4) mutually; The output shaft of magnetic powder brake (9) is meshed with spur rack; This spur rack is fixed on the lathe bed (7), and with axially paralleling of guide rail (5), magnetic powder brake (9) is used for applying axial load to ball screw assembly;
ⅴ, the logical enough belts of reverse mechanism (8) are connected with the belt wheel of main spindle box (1), the top rotation in the driving main shaft case (1), thus control top positive and negative rotation;
ⅵ, switch board (10) are provided with guidance panel, and switch board (10) is connected with other device that loads running in machine, controls other device work.
2. a kind of ball screw assembly, according to claim 1 loads running in machine, and it is characterized in that: described main spindle box (1) is provided with chuck, through the fixing ball-screw of this chuck.
3. a kind of ball screw assembly, according to claim 1 and 2 loads running in machine, it is characterized in that: the both sides that described location-plate (3) is gone up the U-shaped groove are provided with threaded hole, realize being fixedly connected of location-plate (3) and ball nut through threaded hole.
4. the running-in method of testing of a ball screw assembly, loading running in machine the steps include:
(A) load ball screw assembly:
Ball screw assembly, be fixed on load on top between running in machine main spindle box (1) and the tailstock (6), leaning on main spindle box (1) to hold simultaneously with the fixing ball-screw of chuck, prevent ball-screw and top between relatively rotate;
(B) fixing ball nut:
Ball nut on the ball screw assembly, is fixed in the U-shaped groove of location-plate (3) through being threaded, when making the ball-screw rotation, ball nut does not rotate together along with ball-screw and does rectilinear motion;
(C) running-in operation:
The axial force that magnetic powder brake during running-in (9) applies is identical with the pretightning force of ball screw assembly,, and the magnitude of load of setting magnetic powder brake (9) through the guidance panel on the switch board (10) is 2~10Kg, and rotating speed is 50~400 r/min during running-in; And according to reciprocal running-in number of times in the accuracy class setting effective travel; Wherein, when precision is 1,2 grades, reciprocal running-in number of times >=50 in the effective travel; When precision is 3,4 grades; Reciprocal running-in number of times >=40 in the effective travel, when precision is 5,7,10 grades, reciprocal running-in number of times >=30 in the effective travel;
(D) shut-down sequence:
After treating the running-in number of times end of step (C) setting, close the control power supply of magnetic powder brake (9) earlier, close the power supply that loads running in machine again;
(E) performance parameter test:
Performance parameter test comprises: accomplish the temperature rise test of ball nut after 1. running is stopped in half a minute, promptly cooperate survey 2 points on the cylindrical at nut, get its temperature rise maximal value; 2. recheck dynamic unloaded pretension torque, its limit deviation value should meet the requirement of drawing; 3. the ball-recirculation reversing device should be firm, do not allow to become flexible, misplace, come off or exceed the distortion of requirement; 4. O-ring seal should firm, not allow distortion and dislocation;
(F) unloading ball screw assembly:
Unclamp being threaded of location-plate (3) and ball nut, the loading running in machine is left in the ball screw assembly, allocation and transportation through driving.
CN 201110292514 2011-09-30 2011-09-30 Running-in testing method of loading running-in device for ball screw pair CN102445340B (en)

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CN102445340B CN102445340B (en) 2013-08-07

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CN103115770A (en) * 2013-01-23 2013-05-22 南京理工大学 Ball screw assembly precision retaining ability testing device
CN103115772A (en) * 2013-01-25 2013-05-22 南京理工大学 Axial nut loading mechanism for ball screen assemblies
CN103604716A (en) * 2013-11-27 2014-02-26 广州铁路职业技术学院 Screw rod spiral groove accelerated wear tester and test method thereof
CN107727393A (en) * 2017-10-30 2018-02-23 北京自动化控制设备研究所 A kind of small ball lead screw pair loads running-in frock
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CN107727393A (en) * 2017-10-30 2018-02-23 北京自动化控制设备研究所 A kind of small ball lead screw pair loads running-in frock
CN107727393B (en) * 2017-10-30 2019-05-10 北京自动化控制设备研究所 A kind of small ball lead screw pair load running-in tooling
CN108036959A (en) * 2017-12-20 2018-05-15 马鞍山市恒永利机械科技有限公司 A kind of combined machine planker kinematic system method for testing performance
CN108036959B (en) * 2017-12-20 2020-05-08 马鞍山市恒永利机械科技有限公司 Performance test method for carriage motion system of composite machine tool
CN108490878A (en) * 2018-03-17 2018-09-04 北京工业大学 A kind of numerically-controlled machine tool combination linear feed unit wear law test method
CN108490878B (en) * 2018-03-17 2020-08-28 北京工业大学 Abrasion rule test method for combined linear feeding unit of numerical control machine tool

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