CN113504042A - Calibration tool and calibration method for parts with spherical hinge rods at two ends - Google Patents
Calibration tool and calibration method for parts with spherical hinge rods at two ends Download PDFInfo
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- CN113504042A CN113504042A CN202110829078.4A CN202110829078A CN113504042A CN 113504042 A CN113504042 A CN 113504042A CN 202110829078 A CN202110829078 A CN 202110829078A CN 113504042 A CN113504042 A CN 113504042A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/06—Steering behaviour; Rolling behaviour
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Abstract
The invention belongs to the technical field of experimental science, and particularly relates to a calibration tool and a calibration method for parts with spherical hinge rods at two ends. The calibration tool comprises: the pull rod assembly, the data acquisition system and a connecting line thereof, the standard force sensor and the chain block; the draw bar assembly includes: the test steering device comprises a pull plate, a half snap ring, a standard part for connection and a tested steering pull rod; the calibration tool comprises two sets of pull plates, a semi-snap ring, a standard component for connection and the like, can conveniently realize calibration tool connection of parts with hinge rods at two ends, obtains the corresponding relation between the tensile force of the parts with the hinge rods at two ends and the generated strain through a force sensor, a data acquisition system and the like, and finishes calibration of the parts. The method lays a foundation for load acquisition, or subsequent road simulation tests and other fatigue life tests.
Description
Technical Field
The invention belongs to the technical field of experimental science, and particularly relates to a calibration tool and a calibration method for parts with spherical hinge rods at two ends.
Background
The method is characterized in that a tie rod part, a steering tie rod, a steering knuckle arm, a steering knuckle, a steering drag link and the like are all connecting rod parts with spherical hinges or ball heads at two ends, and when a road simulation test or a related performance test, load acquisition or fatigue test is carried out on the tie rod part, a calibration test for finding out the corresponding relation between the strain and the load of the part is the work which needs to be completed firstly in the subsequent test analysis and test design work. Therefore, it is necessary to design a simple and effective calibration tool and find the corresponding relationship between the load and the strain of the rod parts through a reasonable and scientific calibration method.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a simple and easy-to-machine calibration tool and a calibration method for spherical hinge rod parts at two ends to meet the requirement of performing calibration tests on the parts to obtain the corresponding relation between strain and load.
(II) technical scheme
In order to solve the technical problem, the invention provides a calibration tool for parts with spherical hinge rods at two ends, which comprises: the pull rod assembly, the data acquisition system and a connecting line thereof, the standard force sensor and the chain block;
the draw bar assembly includes: the device comprises a pull plate 1, a half snap ring 2, a standard part for connection and a tested steering pull rod 5;
the tested steering tie rod 5 is used as a calibrated tested piece and is a steering tie rod with ball heads at two ends; the tested steering pull rod 5 is vertically arranged;
the two pull plates 1 are respectively arranged at two ends of a tested steering pull rod 5, and a circular cavity is arranged in each pull plate 1 and used for accommodating a ball head at one end of the tested steering pull rod 5;
four semi-snap rings 2 are arranged, and four sets of standard connecting parts are arranged; each two half snap rings 2 are matched to form a complete snap ring for wrapping the rod part at the ball head of the end part of the tested steering pull rod 5, and the tested steering pull rod 5 is fastened on the pull plate 1 from the two horizontal ends of the complete snap ring through two sets of standard parts for connection; each set of standard connecting component comprises a bolt 3 and a nut 4;
therefore, the two pull plates 1 are respectively arranged above and below, and the two pull plates 1 vertically fix the tested steering pull rod 5 therein through four semi-snap rings 2 and four sets of standard connecting parts;
a strain gauge is adhered to the tested steering pull rod 5 and is connected to a data acquisition system through a connecting wire;
the chain block is vertically suspended, and the chain block, the standard force sensor, the pull rod assembly and the ground are connected through a hoisting mechanism respectively and are arranged vertically, so that the gravity center is ensured to be on a vertical line.
Wherein, the hoisting mechanism is a hoisting ring or a hoisting belt.
Wherein the chain block is vertically suspended via a crown block.
The standard force sensor is a digital display standard quantity sensor or a force value of the standard quantity sensor is displayed by connecting a data acquisition system.
The chain block is used for controllably adjusting the load applied to the tested steering pull rod 5, and the specific load value is displayed through a standard force sensor.
Wherein, a strain gauge is pasted on the tested steering pull rod 5 and is connected to a data acquisition system through a connecting wire;
when a tensile force is applied to the tested steering pull rod 5 through the chain block, a strain value of a strain gauge is collected by a data acquisition system, and the tensile force applied to the tested steering pull rod 5 is read through the indication value of a standard force sensor; the tensile force is uniformly increased by the chain block, so that the relation curve of the strain and the load of the tested steering pull rod 5 is obtained.
The pull plate 1 is a thin plate part with a hole at one side, and the radius of a circular cavity in the middle of the pull plate 1 is determined by the distance from the axis of a pin of a ball head at the end part of a tested steering pull rod 5 to the top point of the rod; the diameter of the opening below the middle circular cavity is matched with the size of the rear neck of the ball head of the pull rod.
The semi-clamping rings 2 are respectively pressed on two sides of the pulling plate 1 from the front to the back, and the inner diameter of each semi-clamping ring 2 is the diameter of the neck of the tested steering pulling rod 5; the height of the semi-clamping ring 2 is consistent with the length of the neck of the tested steering pull rod 5, and the semi-clamping ring does not interfere with the ball head of the end part of the tested steering pull rod 5.
The upper part of a trial steering pull rod 5 is connected with one pulling plate 1, the lower part of the trial steering pull rod 5 is connected with the other pulling plate 1, the connection form of the trial steering pull rod is the same as that of the upper pulling plate 1, the pulling plate 1 only needs to be inverted, and the round cavity of the pulling plate 1 is connected with the trial steering pull rod 5.
In addition, the invention also provides a calibration method for parts with spherical hinges at two ends, which is implemented based on the calibration tool and comprises the following steps:
step 1: preparing a pull rod assembly, a data acquisition system and a connecting wire thereof, a standard force sensor and a chain block, and connecting the pull rod assembly, the data acquisition system and the connecting wire, the standard force sensor and the chain block in a vertical arrangement;
step 2: applying a stretching force to the tested steering pull rod 5 through a chain block;
and step 3: acquiring a strain value of a strain gauge on the tested steering pull rod 5 by a data acquisition system;
and 4, step 4: the tensile force borne by the tested steering pull rod 5 is read out through the indication value of a standard force sensor;
and 5: the tensile force is uniformly increased by the chain block, so that the relation curve of the strain and the load of the tested steering pull rod 5 is obtained.
(III) advantageous effects
The invention provides a simple and easy-to-machine calibration tool and a calibration method for spherical hinge rod parts at two ends, which are used for performing calibration tests on the parts to obtain the corresponding relation between strain and load.
Compared with the prior art, the calibration method is simple and practical by using the existing chain block, a data acquisition system, a standard force sensor and the like in a laboratory through the calibration tool consisting of 2 sets of pulling plates, 4 semi-clamping rings and 4 sets of standard parts for connection. The ball hinge does not need to be removed, the test is directly installed, and the operation is convenient. The length of the tension rod is not limited. Meanwhile, the method is suitable for calibrating the tensile force of a tested steering pull rod, a steering pull arm and other pull rod-shaped structural members with spherical hinges.
Drawings
FIG. 1 is a general schematic of the present invention;
FIG. 2 is a front view of the pull rod calibration tool of the present invention;
FIG. 3 is a right side view of a front view of the tie rod calibration tool of the present invention;
FIG. 4 is a front view of the pulling plate of the present invention;
FIG. 5 is a front view of the half snap ring of the present invention;
FIG. 6 is a top view of the half snap ring of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the problems in the prior art, the invention provides a calibration tool for parts with spherical hinges at two ends, as shown in fig. 1-3, the calibration tool comprises: the pull rod assembly, the data acquisition system and a connecting line thereof, the standard force sensor and the chain block;
the draw bar assembly includes: the device comprises a pull plate 1, a half snap ring 2, a standard part for connection and a tested steering pull rod 5;
the tested steering tie rod 5 is used as a calibrated tested piece and is a steering tie rod with ball heads at two ends; the tested steering pull rod 5 is vertically arranged;
the two pull plates 1 are respectively arranged at two ends of a tested steering pull rod 5, and a circular cavity is arranged in each pull plate 1 and used for accommodating a ball head at one end of the tested steering pull rod 5;
four semi-snap rings 2 are arranged, and four sets of standard connecting parts are arranged; each two half snap rings 2 are matched to form a complete snap ring for wrapping the rod part at the ball head of the end part of the tested steering pull rod 5, and the tested steering pull rod 5 is fastened on the pull plate 1 from the two horizontal ends of the complete snap ring through two sets of standard parts for connection; each set of standard connecting component comprises a bolt 3 and a nut 4;
therefore, the two pull plates 1 are respectively arranged above and below, and the two pull plates 1 vertically fix the tested steering pull rod 5 therein through four semi-snap rings 2 and four sets of standard connecting parts;
a strain gauge is adhered to the tested steering pull rod 5 and is connected to a data acquisition system through a connecting wire;
the chain block is vertically suspended, and the chain block, the standard force sensor, the pull rod assembly and the ground are connected through a hoisting mechanism respectively and are arranged vertically, so that the gravity center is ensured to be on a vertical line.
Wherein, the hoisting mechanism is a hoisting ring or a hoisting belt.
Wherein the chain block is suspended vertically via a crown block or other suspendable device.
The standard force sensor is a digital display standard quantity sensor or a force value of the standard quantity sensor is displayed by connecting a data acquisition system.
The positions between the chain block and the standard force sensor can be interchanged. The base plate or the foundation bolt and the like which are convenient for connecting the tool are arranged on the ground and can be conveniently connected.
The chain block is used for controllably adjusting the load applied to the tested steering pull rod 5, and the specific load value is displayed through a standard force sensor.
Wherein, a strain gauge is pasted on the tested steering pull rod 5 and is connected to a data acquisition system through a connecting wire;
when a tensile force is applied to the tested steering pull rod 5 through the chain block, a strain value of a strain gauge is collected by a data acquisition system, and the tensile force applied to the tested steering pull rod 5 is read through the indication value of a standard force sensor; the tensile force is uniformly increased by the chain block, so that the relation curve of the strain and the load of the tested steering pull rod 5 is obtained.
As shown in fig. 4, the pulling plate 1 is a thin plate part with a hole on one side, the radius of a circular cavity in the middle of the pulling plate 1 is determined by the distance from the axis of a pin of a ball head at the end of a tested steering pull rod 5 to the top of the rod, and the radius of the circular cavity is slightly larger; the diameter of an opening below the middle circular cavity is matched with the size of the rear neck of the ball head of the pull rod; the left lower part and the right lower part of the pulling plate 1 are provided with two holes for bolt connection; the upper hole of the pulling plate 1 is a hanging ring through hole and is connected with a chain block or a standard force sensor through the hanging ring.
As shown in fig. 5 and 6, the half snap ring 2 is respectively pressed on two sides of the pulling plate 1 from the front to back direction, and the inner diameter of the half snap ring 2 is the diameter of the neck of the tested steering pulling rod 5; as shown in fig. 5, the height of the half snap ring 2 is equal to the length of the neck of the test tie rod 5, and does not interfere with the ball at the end of the test tie rod 5. The left end and the right end of the half clamping ring are used for enhancing the strength of bolt connection and increasing the clamping and changing height of the joint.
As shown in figure 1, the upper part of a tested steering pull rod 5 is connected with one pull plate 1, the lower part of the tested steering pull rod 5 is connected with the other pull plate 1, the connection form of the tested steering pull rod is the same as that of the upper pull plate 1, the pull plate 1 only needs to be inverted, a circular cavity of the pull plate 1 is connected with the tested steering pull rod 5, a circular hole in the upper center is a lifting ring connection hole and is connected with a T groove of a base plate of a test room through a bolt, or the circular hole is directly fixed with the ground.
In addition, the invention also provides a calibration method for parts with spherical hinges at two ends, which is implemented based on the calibration tool and comprises the following steps:
step 1: preparing a pull rod assembly, a data acquisition system and a connecting wire thereof, a standard force sensor and a chain block, and connecting the pull rod assembly, the data acquisition system and the connecting wire, the standard force sensor and the chain block in a vertical arrangement;
step 2: applying a stretching force to the tested steering pull rod 5 through a chain block;
and step 3: acquiring a strain value of a strain gauge on the tested steering pull rod 5 by a data acquisition system;
and 4, step 4: the tensile force borne by the tested steering pull rod 5 is read out through the indication value of a standard force sensor;
and 5: the tensile force is uniformly increased by the chain block, so that the relation curve of the strain and the load of the tested steering pull rod 5 is obtained.
Example 1
In order to solve the problem of rapidly realizing the calibration of the pull rod type parts, the embodiment provides a pull rod calibration tool and a calibration method thereof. As shown in fig. 1, it includes: the device comprises a pull plate 1, a semi-clamping ring 2, a bolt 3, a nut 4 and a tested steering pull rod 5, wherein a tested piece to be calibrated is a tested steering pull rod 5 with ball heads at two ends, and the pull rod assembly is formed by the pull plate, the semi-clamping ring 2, the bolt 3, the nut 4 and the tested steering pull rod 5; in addition, the device is also provided with a strain gauge, a data acquisition system, a standard force sensor, a chain block, a lifting hook and a connecting block, wherein the strain gauge, the data acquisition system, the standard force sensor and the chain block are connected with each other on the tested steering pull rod 5, the lifting hook is matched with a ground T-shaped groove, the strain quantity acquired by the data acquisition system corresponds to the tensile force displayed by the standard force sensor, and a load-strain characteristic curve of the tested steering pull rod 5 is obtained through testing.
As shown in figure 1, the chain block is vertically suspended by a crane hook of a laboratory, and is sequentially connected with the chain block, a standard force sensor, a calibration tool and a base plate. The lifting ring is connected with a T-groove bolt in a T-groove on the base plate, and the lifting ring is connected with a lower hole of the pull rod assembly through the lifting ring. The chain block position is arranged at a position convenient for a tester to operate.
The pull rod assembly is composed of 2 pull plates 1, 4 semi-snap rings 2 and 4 sets of standard components. They are connected at both ends of the tested steering pull rod 5 which needs to be calibrated. The strain gauge is attached to the designated position of the tested steering pull rod 5 to be calibrated, the strain gauge is connected with the data acquisition system through wiring, and the data acquisition system can acquire strain data of the strain gauge in real time after corresponding setting.
As shown in fig. 2 and 3, for the implementation of the calibration tool, the shape of the opening hole at the center of the upper pull plate 1 of the calibration tool needs to be matched with the outer diameter of the ball hinge head at the upper end of the tested pull rod, so as to ensure that the ball hinge at the upper end of the pull rod can just pass through the opening hole, and two sets of standard components pass through the through hole on the half snap ring for connection and fastening. Similarly, the shape of an opening hole in the center of the pull plate 1 at the lower part of the calibration tool needs to be matched with the outer diameter of a ball hinge head at the lower end of the tested pull rod, the ball hinge at the lower end of the pull rod can just penetrate through the opening hole, and two sets of standard components penetrate through the through hole in the semi-clamping ring to be connected and fastened.
As shown in fig. 5 and 6, two semi-clamping rings 2 in the calibration tool are respectively pressed on two sides of a pull plate 1, and the inner diameter of each semi-clamping ring 2 is the diameter of the neck of a tested pull rod, so that the semi-clamping rings 2 are ensured to be pressed with the ball head diameter of the pull rod. As shown in fig. 5, the height of the half snap ring 2 is consistent with the length of the neck of the tested draw bar, and the half snap ring does not interfere with the ball stud at the upper part of the draw bar. Both ends are for reinforcing bolted connection's intensity about half snap ring 2, increase the height of standard part fastening connection department snap ring.
The standard force sensor meets measuring range and precision, and test data can be displayed in a digital display mode or in a data acquisition system.
Pulling the chain block, sequentially increasing and decreasing step by step according to the load to adjust the load applied to the tested standard part, recording the specific load value displayed by the standard force sensor when the load is changed, and synchronously acquiring the strain value of the strain gauge by a data acquisition system connected with the strain gauge. And circularly increasing and decreasing the load on the chain block step by step for three times to finish the relation curve of the strain and the tensile force when the tested pull rod is tensioned to extend the load, namely finishing the calibration test of the tested piece.
According to the embodiment, the calibration sample of the pull rod and the pull arm type parts can be realized through the existing devices of a laboratory, such as a crown block, a chain block, a lifting ring, a T-slide block, a base plate, a standard force sensor, a data acquisition system and the like, and according to the pull rod assembly which is simple to manufacture for the tested pull rod. The calibration test method is simple and convenient. The invention is applied to the calibration test of the tensile load of a plurality of pull rods with ball joints and ball heads and pull arm parts of a vehicle steering system. The method is a preparation test which must be completed by a subsequent road actual load acquisition test or a road simulation test of a heavy part.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a mark frock that is used for both ends to take ball hinge pole class part which characterized in that, mark the frock and include: the pull rod assembly, the data acquisition system and a connecting line thereof, the standard force sensor and the chain block;
the draw bar assembly includes: the test device comprises a pull plate (1), a half snap ring (2), a standard part for connection and a tested steering pull rod (5);
the tested steering pull rod (5) is used as a calibrated tested piece and is a steering pull rod with ball heads at two ends; the tested steering pull rod (5) is vertically arranged;
the two pulling plates (1) are respectively arranged at two ends of a tested steering pull rod (5), and a circular cavity is arranged in each pulling plate (1) and used for accommodating a ball head at one end of the tested steering pull rod (5);
four half snap rings (2) are arranged, and four sets of standard connecting parts are arranged; each two half snap rings (2) are matched to form a complete snap ring for wrapping the rod part at the ball head of the end part of the tested steering pull rod (5), and the tested steering pull rod (5) is fastened on the pull plate (1) from the horizontal two ends of the complete snap ring through two sets of standard parts for connection; each set of standard connecting component comprises a bolt (3) and a nut (4);
therefore, the two pulling plates (1) are respectively arranged above and below, and the two pulling plates (1) are vertically fixed in the tested steering pull rod (5) through four semi-clamping rings (2) and four sets of standard parts for connection;
a strain gauge is pasted on the tested steering pull rod (5) and is connected to a data acquisition system through a connecting wire;
the chain block is vertically suspended, and the chain block, the standard force sensor, the pull rod assembly and the ground are connected through a hoisting mechanism respectively and are arranged vertically, so that the gravity center is ensured to be on a vertical line.
2. The calibrating tool for parts with spherical hinges at two ends as claimed in claim 1, wherein said hoisting mechanism is a hoisting ring or a hoisting belt.
3. Calibration fixture for parts with spherical hinges at both ends according to claim 1, characterized in that the inverted chain is suspended vertically via a crown block.
4. The calibration tool for parts with spherical hinges at two ends as claimed in claim 1, wherein the standard force sensor is a digital display standard quantity sensor or a force value thereof is displayed by connecting a data acquisition system.
5. Calibration fixture for parts with spherical hinges at both ends according to claim 1, characterized in that the chain block is used for controllably adjusting the load applied to the tested steering tie rod (5) and displaying the specific load value thereof through a standard force sensor.
6. The calibration tool for parts with spherical hinges at two ends as claimed in claim 5, wherein a strain gauge is pasted on the tested steering pull rod (5) and is connected to a data acquisition system through a connecting wire;
when a tensile force is applied to the tested steering pull rod (5) through the chain block, a strain value of a strain gauge is collected by a data acquisition system, and the tensile force borne by the tested steering pull rod (5) is read out through the indication value of a standard force sensor; the tensile force is uniformly increased through the chain block, so that the relation curve of the strain and the load of the tested steering pull rod (5) is obtained.
7. The calibrating tool for parts with spherical hinges at two ends as claimed in claim 1, wherein the pull plate (1) is a thin plate part with an opening at one side, and the radius of the circular cavity in the middle of the pull plate (1) is determined by the distance from the pin axis of the ball head at the end of the tested steering pull rod (5) to the top point of the rod; the diameter of the opening below the middle circular cavity is matched with the size of the rear neck of the ball head of the pull rod.
8. The calibrating tool for the parts with the spherical hinge rods at two ends as claimed in claim 1, wherein the semi-clamping rings (2) are respectively pressed on two sides of the pulling plate (1) from the front to the rear direction, and the inner diameter of each semi-clamping ring (2) is the diameter of the neck of the tested steering pulling rod (5); the height of the half clamping ring (2) is consistent with the length of the neck of the tested steering pull rod (5), and the half clamping ring does not interfere with the bulb of the end part of the tested steering pull rod (5).
9. The calibrating tool for parts with spherical hinge rods at two ends as claimed in claim 1, wherein the upper part of the tested steering pull rod (5) is connected with one pull plate (1), the lower part of the tested steering pull rod (5) is connected with the other pull plate (1), the connection form of the tested steering pull rod and the other pull plate is the same as that of the upper pull plate (1), only the pull plate (1) needs to be inverted, and the circular cavity of the pull plate (1) is connected with the tested steering pull rod (5).
10. A calibration method for parts with spherical hinges at two ends, which is implemented based on the calibration tool of claim 6, and comprises the following steps:
step 1: preparing a pull rod assembly, a data acquisition system and a connecting wire thereof, a standard force sensor and a chain block, and connecting the pull rod assembly, the data acquisition system and the connecting wire, the standard force sensor and the chain block in a vertical arrangement;
step 2: applying a stretching force to the tested steering pull rod (5) through a chain block;
and step 3: acquiring strain values of strain gauges on a tested steering pull rod (5) by a data acquisition system;
and 4, step 4: the tensile force borne by the tested steering pull rod (5) is read out through the indication value of a standard force sensor;
and 5: the tensile force is uniformly increased through the chain block, so that the relation curve of the strain and the load of the tested steering pull rod (5) is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829078.4A CN113504042A (en) | 2021-07-22 | 2021-07-22 | Calibration tool and calibration method for parts with spherical hinge rods at two ends |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829078.4A CN113504042A (en) | 2021-07-22 | 2021-07-22 | Calibration tool and calibration method for parts with spherical hinge rods at two ends |
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| CN113504042A true CN113504042A (en) | 2021-10-15 |
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| CN202110829078.4A Pending CN113504042A (en) | 2021-07-22 | 2021-07-22 | Calibration tool and calibration method for parts with spherical hinge rods at two ends |
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| CN (1) | CN113504042A (en) |
Cited By (1)
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| CN114942148A (en) * | 2022-04-11 | 2022-08-26 | 中国第一汽车股份有限公司 | General test bench for motor home traction device and test method |
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