CN112393900A - Ball screw pair friction testing device - Google Patents
Ball screw pair friction testing device Download PDFInfo
- Publication number
- CN112393900A CN112393900A CN202011276279.8A CN202011276279A CN112393900A CN 112393900 A CN112393900 A CN 112393900A CN 202011276279 A CN202011276279 A CN 202011276279A CN 112393900 A CN112393900 A CN 112393900A
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- China
- Prior art keywords
- ball screw
- screw pair
- detected
- sliding seat
- base
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- Pending
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 230000001939 inductive effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 7
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Abstract
The invention provides a friction force testing device of a ball screw pair, which can automatically implement a testing process, and has accurate measuring result and high implementation efficiency. It includes: the pushing structure, the pre-tightening force loading structure, the fixing structure of the ball screw pair to be detected and the displacement sensor are sequentially arranged above the base; the pushing structure is connected with the pre-tightening force loading structure through a pressure sensor; the pre-tightening force loading structure comprises a sliding seat, and the sliding seat is connected with one end of a ball screw of the ball screw pair to be detected through a coupler; a linear guide rail structure is arranged above the base along the placing direction of the ball screw pair to be detected, and the sliding seat is connected with the linear guide rail structure in a sliding mode through a sliding block structure; the fixing structure comprises a mounting seat, and a bearing is arranged in the mounting seat and is vertical to the ball screw; the other end of the ball screw is provided with a nut in the ball screw pair to be detected, and the nut in the ball screw pair to be detected is arranged in the bearing; the displacement sensor is connected with the sliding seat through the induction rod.
Description
Technical Field
The invention relates to the technical field of quality detection of a ball screw pair, in particular to a friction force testing device of the ball screw pair.
Background
The ball screw pair is the most commonly used transmission element on tool machinery and precision machinery, and has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency. Before delivery, the assembly quality condition needs to be detected, particularly whether the phenomenon of jamming exists between the nut and the screw rod or not; in the prior art, most of the hand feeling tests are carried out manually, but the manual hand feeling test efficiency is low, and errors are easy to occur; particularly, in the case where the ball screw is a long screw, the nut is manually rolled from one end of the ball screw to the other end, which makes the operation very difficult.
Disclosure of Invention
The invention provides a friction force testing device of a ball screw pair, which can automatically implement a testing process, has accurate measuring results and high implementation efficiency and aims to solve the problems that the implementation process is difficult, errors are easy to occur and the efficiency is low when the mounting quality of nuts and screws of the ball screw pair is manually confirmed.
The technical scheme of the invention is as follows: the utility model provides a ball screw pair frictional force testing arrangement which characterized in that, it includes: the pushing structure, the pre-tightening force loading structure, the fixing structure of the ball screw pair to be detected and the displacement sensor are sequentially arranged above the base;
the pushing structure is connected with the pre-tightening force loading structure through a pressure sensor;
the pre-tightening force loading structure comprises a sliding seat, and the sliding seat is connected with one end of a ball screw of the ball screw pair to be detected through a coupler; a linear guide rail structure is arranged above the base along the placing direction of the ball screw pair to be detected, and the sliding seat is connected with the linear guide rail structure in a sliding mode through a sliding block structure;
the fixing structure comprises a mounting seat, and a bearing is arranged in the mounting seat and is vertical to the ball screw; the other end of the ball screw is provided with a nut in the ball screw pair to be detected, and the nut in the ball screw pair to be detected is arranged in the bearing;
the displacement sensor is connected with the sliding seat through an induction rod.
It is further characterized in that:
the pushing structure comprises a servo electric cylinder, and the pressure sensor is arranged at the top end of an output shaft of the servo electric cylinder; a floating joint is fixedly arranged on the side wall of the sliding seat, which is positioned at one end of the servo electric cylinder, and the pressure sensor is connected with the floating joint; the coupler is arranged on the side wall of the other end, opposite to the floating joint, of the sliding seat;
the linear guide rail structure and the support frame of the pushing structure are arranged on the upper end face of the base through a fixed seat, and the fixed seat is detachably arranged on the upper end face of the base through a bolt;
the positioning ruler is arranged above the mounting seat parallel to the direction of the ball screw in the ball screw pair to be detected;
an original point positioning rod is arranged on the positioning ruler;
the pressure sensor, the displacement sensor and the servo electric cylinder are electrically connected with a PLC control system.
According to the friction force testing device for the ball screw pair, the pre-tightening force loading structure is driven by the servo electric cylinder to load thrust or tension on the ball screw in the ball screw pair to be detected, so that the ball screw in the ball screw pair to be detected and a nut are displaced relatively; the pressure in the push-pull process is tested through the pressure sensor, the displacement of the ball screw relative to the nut in the push-pull process is tested through the displacement sensor, then a curve is constructed for the pressure and the displacement, whether the relative relation between the pressure and the displacement changes within an allowable range in the relative displacement process of the ball screw and the nut is judged, whether the friction force between the ball screw and the nut changes abnormally is further judged, and whether the quality of the ball screw pair to be detected is qualified is further confirmed.
Drawings
FIG. 1 is a schematic three-dimensional structure of a device for testing friction of a ball screw pair in the present patent;
fig. 2 is a schematic sectional structural view of the friction force testing device of the ball screw pair.
Detailed Description
As shown in fig. 1 to 2, the present invention includes a device for testing a friction force of a ball screw assembly, including: the pushing structure, the pre-tightening force loading structure and the fixing structure of the ball screw pair to be detected are sequentially arranged above the base 11; the pushing structure is connected with the pre-tightening force loading structure through a pressure sensor 7; the pushing structure comprises a servo electric cylinder, and an electric cylinder 10 in the servo electric cylinder is driven by a servo motor 16; the top end of an output shaft 17 of the servo electric cylinder is provided with a pressure sensor 7, the pressure sensor 7 is fixedly connected with one end of a sliding seat 6 through a floating joint 14, and a coupler 5 is arranged on the side wall, opposite to the floating joint 14, of the sliding seat 6; the pressure sensor 7 and the coupler 5 are arranged horizontally; and a displacement sensor 9 is arranged above the pushing structure, and the displacement sensor 9 is connected with the sliding seat 6 through an induction rod.
The pre-tightening force loading structure comprises a sliding seat 6, wherein the sliding seat 6 locks one end of the ball screw 1 through a coupler 5; a linear guide rail structure 8 is arranged above the base 11 along the placing direction of the ball screw pair to be detected, and the sliding seat 6 is connected with the linear guide rail structure 8 in a sliding mode through a sliding block structure; the sliding seat 6 locks one end of the ball screw 1 through the coupler 5, so the moving displacement of the sliding seat is the displacement of the ball screw.
In the embodiment, the pressure sensor is realized by a WTP 301S-type pull pressure sensor (the measurement precision is 0.2% F.S.), the electric cylinder is realized by a LindloE 50, the motor is realized by a Huichuan ISMH series servo motor, and the coupling 5 is realized by a single-joint cross universal joint coupling with the outer diameter of 25 and the length of 60; the displacement sensor 9 is a pull rod ruler type high-precision displacement sensor (measuring mileage is 0-300 mm, measuring precision is 1%), and displacement detection precision is guaranteed.
The fixing structure comprises a mounting seat 4, and a bearing 3 is vertically arranged in the mounting seat 4; the other end of the ball screw 1 is provided with a nut 2 in a ball screw pair to be detected, and the nut 2 in the ball screw pair to be detected is arranged in a bearing 3; the positioning ruler 12 is arranged above the mounting seat 4 which is arranged in the ball screw pair to be detected and is parallel to the direction of the ball screw 1, and the positioning ruler 12 is provided with an original point positioning rod 19; in the embodiment, the positioning ruler 12 is detachably arranged above the mounting seat 4 through the locking block 13; the positioning ruler 12 is parallel to the ball screw 1, the original point positioning rod 19 is perpendicular to the positioning ruler 12, when an operator places the ball screw pair in the bearing 3 in the mounting seat 4, the original point of the ball screw can be positioned only by aligning one end of the roll aligning screw 1 with the positioning rod 19, the operation is simple, and errors are not easy to occur; aiming at the ball screws 1 with different lengths, the original positions are different, so that the positioning ruler 12 is installed on the equipment in an adjustable mode, and the technical scheme can be suitable for the ball screw pairs with different lengths.
The pushing structure is arranged on the upper end surface of the base 11 through a support frame 20; the linear guide rail structure 8 and the support frame 20 are arranged on the upper end surface of the base 11 through a fixed seat 18, the fixed seat 18 is detachably mounted on the upper end surface of the base 11 through bolts, and in the embodiment shown in fig. 2, the fixed seat 18 is detachably mounted on the upper end surface of the base 11 through a handle screw; if the length of the ball screw 1 in the ball screw pair to be detected is changed greatly, the horizontal distance between the support frame 20, the linear guide rail structure 8 and the mounting seat 4 can be adjusted by adjusting the horizontal position of the fixing seat 18 on the upper end surface of the base 11, so that the ball screw pair to be detected is suitable for the tests of the ball screws with different lengths, and the technical scheme is further ensured to be suitable for the tests of the ball screw pairs with different lengths; when the fixing seat 18 is adjusted on the upper end surface of the base 11, a positioning block (not shown) at the bottom end of the fixing seat 18 moves along the positioning groove 21, so that the central lines of the support frame 20 and the linear guide rail structure 8 on the fixing seat 18 cannot deviate from the central line of the mounting seat 4, and further the test of the ball screw 1 cannot make mistakes.
During testing, an operator installs a nut 2 in a ball screw pair in a bearing 3, and one end of the ball screw 1 is aligned with an original point positioning rod 19 to determine the original point of the ball screw; the other end of the ball screw 1 is locked and fixed through a coupler 5; the servo electric cylinder is started, the output shaft 17 of the servo electric cylinder drives the sliding seat 6 to move, the sliding seat 6 moves along the linear guide rail structure 8 through the sliding block at the bottom end, and thrust or pull is applied to the ball screw 1; the ball screw 1 and the nut 2 which are subjected to the thrust or the pulling force are subjected to relative displacement; the pressure sensor 7, the displacement sensor 9 and the servo electric cylinder are electrically connected with a PLC control system (not marked in the figure), the pressure applied to the ball screw 1 and the nut 2 in the displacement process and the displacement generated by the sliding seat 6 are transmitted to the PLC control system, and a relative relation graph of the pressure and the displacement is drawn in the PLC control system; if the friction force between a certain position of the ball screw 1 and the nut 2 changes too much, the relation between the tension and the displacement changes abnormally, and the position of the abnormal position on the rolling ball screw 1 can be found through a relative relation graph of the pressure and the displacement.
Through this patent technical scheme to the ball screw in the ball screw pair and the frictional force between the nut test, not only can the whole test procedure of automatic execution, the test implementation efficiency is high, and the test result is accurate, can be accurate find the position that takes place unusually on the ball screw, this patent technical scheme can be applicable to the test of the ball screw of different length simultaneously, is applicable to different products.
Claims (6)
1. The utility model provides a ball screw pair frictional force testing arrangement which characterized in that, it includes: the pushing structure, the pre-tightening force loading structure, the fixing structure of the ball screw pair to be detected and the displacement sensor are sequentially arranged above the base;
the pushing structure is connected with the pre-tightening force loading structure through a pressure sensor;
the pre-tightening force loading structure comprises a sliding seat, and the sliding seat is connected with one end of a ball screw of the ball screw pair to be detected through a coupler; a linear guide rail structure is arranged above the base along the placing direction of the ball screw pair to be detected, and the sliding seat is connected with the linear guide rail structure in a sliding mode through a sliding block structure;
the fixing structure comprises a mounting seat, and a bearing is arranged in the mounting seat and is vertical to the ball screw; the other end of the ball screw is provided with a nut in the ball screw pair to be detected, and the nut in the ball screw pair to be detected is arranged in the bearing;
the displacement sensor is connected with the sliding seat through an induction rod.
2. The device for testing the friction force of the ball screw pair according to claim 1, wherein: the pushing structure comprises a servo electric cylinder, and the pressure sensor is arranged at the top end of an output shaft of the servo electric cylinder; a floating joint is fixedly arranged on the side wall of the sliding seat, which is positioned at one end of the servo electric cylinder, and the pressure sensor is connected with the floating joint; and the sliding seat is provided with the coupler on the side wall of the other end opposite to the floating joint.
3. The device for testing the friction force of the ball screw pair according to claim 1, wherein: the linear guide structure with the support frame of propelling movement structure passes through the fixing base setting and is in the base up end, the fixing base passes through the bolt detachable and installs the base up end.
4. The device for testing the friction force of the ball screw pair according to claim 1, wherein: the positioning ruler is arranged above the mounting base parallel to the direction of the ball screw in the ball screw pair to be detected.
5. The device for testing the friction force of the ball screw pair according to claim 4, wherein: and an original point positioning rod is arranged on the positioning ruler.
6. The device for testing the friction force of the ball screw pair according to claim 1, wherein: the pressure sensor, the displacement sensor and the servo electric cylinder are electrically connected with a PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276279.8A CN112393900A (en) | 2020-11-16 | 2020-11-16 | Ball screw pair friction testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276279.8A CN112393900A (en) | 2020-11-16 | 2020-11-16 | Ball screw pair friction testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112393900A true CN112393900A (en) | 2021-02-23 |
Family
ID=74599479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011276279.8A Pending CN112393900A (en) | 2020-11-16 | 2020-11-16 | Ball screw pair friction testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112393900A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781872A (en) * | 2020-12-30 | 2021-05-11 | 慈兴集团有限公司 | Ball screw frictional resistance detection device |
| CN115342866A (en) * | 2022-10-18 | 2022-11-15 | 中国空气动力研究与发展中心高速空气动力研究所 | Piezoelectric ceramic actuator detection device and system |
| CN115342866B (en) * | 2022-10-18 | 2023-01-31 | 中国空气动力研究与发展中心高速空气动力研究所 | Piezoelectric ceramic actuator detection device and system |
-
2020
- 2020-11-16 CN CN202011276279.8A patent/CN112393900A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781872A (en) * | 2020-12-30 | 2021-05-11 | 慈兴集团有限公司 | Ball screw frictional resistance detection device |
| CN115342866A (en) * | 2022-10-18 | 2022-11-15 | 中国空气动力研究与发展中心高速空气动力研究所 | Piezoelectric ceramic actuator detection device and system |
| CN115342866B (en) * | 2022-10-18 | 2023-01-31 | 中国空气动力研究与发展中心高速空气动力研究所 | Piezoelectric ceramic actuator detection device and system |
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