CN114427965A - Ball pin assembly design verification and durability test platform and use method thereof - Google Patents
Ball pin assembly design verification and durability test platform and use method thereof Download PDFInfo
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- CN114427965A CN114427965A CN202210308345.8A CN202210308345A CN114427965A CN 114427965 A CN114427965 A CN 114427965A CN 202210308345 A CN202210308345 A CN 202210308345A CN 114427965 A CN114427965 A CN 114427965A
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000012942 design verification Methods 0.000 title claims abstract description 17
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- 238000013461 design Methods 0.000 claims description 42
- 210000004907 gland Anatomy 0.000 claims description 33
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- G01M13/00—Testing of machine parts
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to the technical field of automobile industry, and discloses a ball pin assembly design verification and durability test platform and a use method thereof, wherein the ball pin assembly design verification and durability test platform comprises a fixed platform, a speed regulating motor assembly, a dynamic torque sensor assembly and a ball pin debugging box are sequentially arranged on the fixed platform from left to right, a coupler is arranged between the speed regulating motor assembly and the dynamic torque sensor assembly, a ball pin assembly is arranged in the ball pin debugging box, and a telescopic coupler is arranged between the dynamic torque sensor assembly and the ball pin debugging box; by adopting the technical scheme, the ball head pin assembly development system can help related research and development personnel to realize low-cost, high-efficiency and short-time development of a ball head pin assembly product, and can preliminarily verify the influence relationship of long-time operation of the ball head pin assembly on the torque of the ball head pin assembly.
Description
Technical Field
The invention belongs to the technical field of automobile industry, and particularly relates to a ball pin assembly design verification and durability test platform and a using method thereof.
Background
The ball pin used in the current domestic and foreign automobiles, no matter German, American or Japanese systems, can cause looseness, abrasion and falling of the ball pin along with long-time use, so that the problems of deviation and shimmy of the automobile occur, and the stability and the reliability of automobile operation are influenced.
In the prior art, the design of the ball stud is preliminarily determined by designers through the past design experience and multiple design improvements, and the design is verified by a special test platform after the design is finished.
In the prior art, a plurality of ball stud assembly online detection devices also appear, for example, the patent application number is: CN202021083366.7 discloses an online detection device for ball pin assembly, which comprises a machine table and a vertical frame fixedly connected to the machine table, wherein a rotary disc mechanism and a torque sensor are mounted on the machine table, a ball clamp is mounted on the rotary disc mechanism, the front end of the torque sensor is connected with the rotary disc mechanism through a coupling, and the rear end of the torque sensor is connected with a servo motor through a coupling; the vertical frame is provided with a control cabinet, a sliding frame is connected with the sliding frame in a sliding mode and driven to slide through a lifting mechanism, a spindle motor and a clutch gearbox are installed on the sliding frame, the spindle motor is connected with the clutch gearbox through a shaft coupling, an output shaft of the clutch gearbox is provided with a spin riveting shaft, and a spin riveting head is installed on the spin riveting shaft; and a torsion display is arranged on the control cabinet.
Above-mentioned this kind of current bulb round pin assembly on-line measuring device, be applicable to the rotatory moment of torsion when assembling the bulb round pin and gather and detect, use to reach and predetermine the torque value and be the assembly standard, ensure that the product reaches the quality standard requirement, but this kind of current bulb round pin assembly on-line measuring device, can only detect the bulb round pin that has designed and need carry out batch assembly, but can not examine when tentatively designing the bulb round pin, thereby it is time-consuming, the consumptive material reduces the result of use.
Disclosure of Invention
The invention aims to provide a ball stud assembly design verification and durability test platform which is simple in structure, convenient to use, capable of researching and developing a ball stud assembly and capable of preliminarily verifying the overall performance of a ball stud and a use method thereof.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a bulb round pin assembly design is verified and durability test platform, includes fixed platform, and the last buncher subassembly, dynamic torque sensor subassembly and the bulb round pin debugging case of installing in proper order from left to right of fixed platform installs the shaft coupling between buncher subassembly and the dynamic torque sensor subassembly, installs bulb round pin assembly in the bulb round pin debugging case, installs telescopic coupling between dynamic torque sensor subassembly and the bulb round pin debugging case.
The following is a further optimization of the above technical solution of the present invention:
the adjustable speed motor assembly comprises an adjustable speed motor, a motor support is installed below the adjustable speed motor, the motor support is fixedly installed on the fixed platform, a motor digital display speed regulator is arranged on one side of the adjustable speed motor, and the motor digital display speed regulator is electrically connected with the adjustable speed motor.
Further optimization: the dynamic torque sensor assembly comprises a torque sensor, a sensor fixing seat is fixedly mounted below the torque sensor, the sensor fixing seat is fixedly mounted on a fixing platform, and a display area and a sensor serial port are arranged on the torque sensor.
Further optimization: the ball pin debugging box comprises a box body fixedly mounted on the fixed platform, a box body side hole is formed in one side, close to the torque sensor, of the box body, and a mounting position for mounting the ball pin assembly is arranged at a position, close to the box body side hole, in the box body.
Further optimization: a first threaded hole is formed in the position, corresponding to the box body side hole, of the box body, a bolt ejector rod is connected to the first threaded hole in an internal thread mode, and a top cover is connected to one end, close to the box body side hole, of the bolt ejector rod in a rotating mode.
Further optimization: a second threaded hole is formed in the position, close to the box body side hole, of the box body, the second threaded hole is communicated with the box body side hole, a set screw is connected with the second threaded hole in an internal thread mode, and the axis of the set screw and the axis of the box body side hole are perpendicularly arranged.
Further optimization: the ball pin assembly comprises a ball pin joint, a ball pin seat is installed in the ball pin joint, a ball pin is installed in the ball pin seat, a ball pin gland is installed in the ball pin joint and is in abutting joint with the ball pin seat, and a limiting step is arranged in the ball pin joint.
The invention also provides a use method of the ball pin assembly design verification and durability test platform, which comprises the following steps: 1. size definition:
and Lz: the distance between the limit step and the design theoretical height of the ball head pin joint;
l: the distance from the ball head pin gland to the ball center of the ball head pin joint;
δ: the actual distance between the limiting step and the ball center of the ball head pin joint;
delta S: is a reserved compressed size;
l1: the distance between the rear end surface of the top cover and the front end surface of the box body;
l2: the distance between the rear end face of the top cover and the front end face of the ball pin gland;
l3: the distance between the limiting step and the front end face of the box body;
the using method comprises the steps of verifying the design theoretical height Lz and the durability test of the ball pin assembly;
verifying the design theoretical height Lz comprises the following steps:
s1, designing the overall structure size of the ball head pin assembly, wherein after the design is finished, the sizes delta, L2 and L3 are known sizes after the design;
s2, processing a verification sample, wherein the verification sample is processed according to the overall size of the designed ball pin assembly, and the size delta of the verification sample is smaller than the design theoretical height Lz; the dimension L is greater than the design theoretical height Lz;
s3, determination of the final design theoretical height Lz: installing the processed verification sample piece in a side hole of a box body, firstly rotating a bolt ejector rod to enable a top cover to push a ball head pin gland to move a certain distance to one side close to a limiting step, and then enabling a ball head pin of the verification sample piece to be in transmission connection with a telescopic coupling;
s4, starting a torque sensor, a speed regulating motor and a motor digital display speed regulator, finely adjusting the bolt ejector rod to increase the rotating torque of the ball pin to a preset torque according to the torque displayed on the torque sensor, waiting for 1-2 days of torque attenuation, and then finely adjusting the bolt ejector rod until the rotating torque of the ball pin is stabilized at the preset torque;
s5, calculating the design theoretical height Lz: the final design theoretical height Lz can be calculated by measuring the dimension L1 by using a vernier caliper and L1, and the calculation formula is as follows: Δ S = L1-L3-L2, Lz = δ + Δs.
The following is a further optimization of the above technical solution of the present invention:
the durability test of the ball pin assembly comprises the following durability test before riveting:
q1, mounting the ball stud assembly before riveting on the ball stud assembly design verification and durability test platform;
q2, starting a torque sensor, a speed regulating motor and a motor digital display speed regulator, enabling the speed regulating motor to rotate at a certain rotating speed, then finely adjusting the bolt ejector rod to increase the rotating torque of the ball pin to a preset torque, waiting for 1-2 days of torque attenuation, and then finely adjusting the bolt ejector rod until the rotating torque of the ball pin is stabilized at the preset torque;
q3, finally enabling the speed regulating motor to rotate for a long time at a constant rotating speed, monitoring the torque value in real time, and judging the durability of the ball pin assembly before riveting.
Further optimization: the durability test of the ball pin assembly further comprises a durability test after riveting:
h1, mounting the riveted ball stud assembly on a ball stud assembly design verification and durability test platform;
h2, finely adjusting the bolt ejector rod to enable the top cover to tightly push the ball pin gland;
h3, starting the speed regulating motor to rotate at a certain rotating speed for a long time, monitoring the torque value in real time, and judging the durability of the ball pin assembly after riveting.
By adopting the technical scheme, the ball pin assembly development platform is ingenious in conception and reasonable in structure, related research and development personnel can be helped to develop a ball pin assembly product with low cost, high efficiency and short time through the platform, and the influence relation of long-time operation of the ball pin assembly on the torque of the ball pin assembly can be preliminarily verified.
The ball pin assembly has the advantages of simple integral structure and convenience in use, can reduce use cost, improve use effect and efficiently help related research and development personnel to develop a ball pin assembly product.
The invention is further illustrated with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is an exploded view of the overall structure of an embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of a ball stud adjustment box in an embodiment of the invention;
FIG. 4 is a cross-sectional view of a validation sample in an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a ball joint pin joint in an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a riveted ball stud assembly in an embodiment of the present invention.
In the figure: 100-a stationary platform; 200-speed regulating motor components; 210-a speed regulating motor; 220-motor digital display speed regulator; 230-a motor support; 300-a coupler; 400-a dynamic torque sensor assembly; 410-a torque sensor; 411-display area; 412-sensor serial port; 420-sensor holder; 500-telescoping coupling; 600-ball stud debugging box; 610-a box body; 611-side holes of the box body; 630-bolt ejector pin; 620-a top cover; 640-set screws; 700-ball stud assembly; 740-ball stud; 730-ball joint; 731-pin boss installation cavity; 732-a gland installation cavity; 733-conical cavity; 734-limit step; 720-ball pin seat; 710-ball stud gland.
Detailed Description
Referring to fig. 1-6, a ball stud assembly design verification and durability test platform includes a fixed platform 100, a speed regulating motor assembly 200, a dynamic torque sensor assembly 400, and a ball stud debugging box 600 are sequentially installed on the fixed platform 100 from left to right, a coupling 300 is installed between the speed regulating motor assembly 200 and the dynamic torque sensor assembly 400, a ball stud assembly 700 is installed in the ball stud debugging box 600, and a telescopic coupling 500 is installed between the dynamic torque sensor assembly 400 and the ball stud debugging box 600.
The speed regulating motor assembly 200 comprises a speed regulating motor 210, a motor bracket 230 is arranged below the speed regulating motor 210, and the motor bracket 230 is fixedly arranged on the fixed platform 100.
One side of the speed regulating motor 210 is provided with a motor digital display speed regulator 220 which is matched with the speed regulating motor 210, and the motor digital display speed regulator 220 is electrically connected with the speed regulating motor 210.
By the design, the adjustable speed motor 210 can be fixedly mounted on the fixed platform 100 through the motor support 230, the assembly and the mounting are convenient, and the motor digital display speed governor 220 can be used for adjusting the rotating speed of the adjustable speed motor 210 and displaying the real-time rotating speed of the adjustable speed motor 210.
The output power of the speed regulation motor 210 can be used for driving the ball stud assembly 700 to rotate, and is used for detecting the performance of the ball stud assembly 700.
The dynamic torque sensor assembly 400 includes a torque sensor 410, a sensor holder 420 fixedly mounted below the torque sensor 410, and the sensor holder 420 fixedly mounted on the fixed platform 100.
The torque sensor 410 is provided with a display area 411, and the magnitude of the torque detected by the torque sensor 410 is displayed on the display area 411.
The torque sensor 410 is provided with a sensor serial port 412, and the torque detected by the torque sensor 410 can be collected and stored through the sensor serial port 412.
The coupler 300 is installed between the speed regulating motor 210 and the torque sensor 410, one end of the coupler 300 is in transmission connection with the power output end of the speed regulating motor 210, and the other end of the coupler 300 is in transmission connection with the power input end of the torque sensor 410.
The output power of the speed regulating motor 210 is transmitted to the torque sensor 410 through the coupling 300.
A conical cavity 733 is coaxially formed in the position, close to the pin boss mounting cavity 731, of the ball head pin joint 730, and the conical cavity 733 is communicated with the pin boss mounting cavity 731.
A ball pin seat 720 is installed in a pin seat installation cavity 731 of the ball pin joint 730, a ball pin 740 is installed in the ball pin seat 720, and one end of the ball pin 740, which is far away from the ball pin seat 720, penetrates through the conical cavity 733 and extends to the outside of the ball pin joint 730.
The conical cavity 733 enables the ball stud 740 to swing greatly and rotate axially.
A ball stud gland 710 is mounted in a gland mounting cavity 732 of the ball stud joint 730, and the ball stud gland 710 is abutted against the ball stud seat 720.
The diameter of the inner surface of the pin seat mounting cavity 731 is smaller than that of the inner surface of the gland mounting cavity 732, and a limiting step 734 is arranged at the joint of the pin seat mounting cavity 731 and the gland mounting cavity 732.
In this embodiment, the ball stud seat 720 is a plastic member, and the ball stud seat 720 is filled with grease.
The telescopic coupling 500 is arranged between the torque sensor 410 and the ball stud 740, one end of the telescopic coupling 500 is in transmission connection with the power output end of the torque sensor 410, and the other end of the telescopic coupling 500 is in transmission connection with the ball stud 740.
Ball stud debugging box 600 includes box 610 fixedly mounted on fixed platform 100, and box side hole 611 is opened on the side that is close to torque sensor 410 on box 610, and the position department that is close to box side hole 611 in box 610 is provided with the installation position that is used for installing ball stud assembly 700.
A first threaded hole is formed in the position, corresponding to the box body side hole 611, of the box body 610, a bolt ejector rod 630 is connected to the first threaded hole in a threaded mode, and the bolt ejector rod 630 and the box body side hole 611 are arranged coaxially.
One end of the bolt ejector rod 630 close to the box body side hole 611 is rotatably connected with a top cover 620, and the top cover 620 is used for pressing the ball stud gland 710.
A second threaded hole is formed in the position, close to the side hole 611 of the box body, of the box body 610 and communicated with the side hole 611 of the box body, a set screw 640 is connected to the second threaded hole in an internal thread mode, and the axis of the set screw 640 and the axis of the side hole 611 of the box body are perpendicularly arranged.
With this design, ball pin assembly 700 can be installed at an installation location within cage 610 with ball pin joint 730 installed within cage side hole 611.
Then, by rotating the bolt ejector 630, the bolt ejector 630 can drive the top cover 620 to move towards the two sides close to or away from the ball stud gland 710, when the top cover 620 moves towards the side close to the ball stud gland 710, the top cover 620 is abutted against the ball stud gland 710, and at this time, the bolt ejector 630 and the top cover 620 can be used for pressing the ball stud gland 710 tightly.
The invention also provides a use method of the ball pin assembly design verification and durability test platform, which comprises the following steps:
1. size definition:
and Lz: the design theoretical height of the spacing step 734 from the sphere center of the ball head pin joint 730;
l: distance from ball stud gland 710 to ball stud joint 730 center;
δ: the actual distance between the limit step 734 and the center of the ball joint 730;
delta S: is a reserved compressed size;
l1: the distance between the rear end face of the top cap 620 and the front end face of the case 610;
l2: the distance between the rear end face of top cap 620 and the front end face of ball stud gland 710;
l3: the distance between the limit step 734 and the front end face of the box body 610;
the units of Lz, L, δ, Δ S, L1, L2, and L3 are all millimeters (mm).
The using method comprises the steps of verifying the design theoretical height Lz and the durability test of the ball pin assembly;
the Lz dimension is a critical dimension in the design of the ball stud assembly 700, that is, the design theoretical height of the spacing step 734 from the center of the ball stud joint 730, and the Lz dimension directly affects the degree of clasping of the ball stud seat 720 to the ball stud 740, and determines whether the swing moment and the rotation moment of the ball stud 740 meet the requirements of the industry standard after the assembly of the ball stud assembly 700 is completed.
The design theoretical height Lz is verified by the following steps:
s1, designing the overall structural size of the ball stud assembly 700, wherein after the design is completed, the sizes delta, L2 and L3 are all known sizes after the design.
S2, processing a verification sample, wherein the verification sample is processed according to the overall size of the designed ball pin assembly 700, and the size delta of the verification sample is smaller than the design theoretical height Lz; dimension L is greater than design theoretical height Lz.
The distance deltaS between the ball stud gland 710 and the limiting step 734 is a reserved compression size, and the compression space of the ball stud gland 710 for the ball stud seat 720 is reserved, so that the degree of hugging of the ball stud seat 720 for the ball stud 740 is conveniently adjusted through the bolt ejector rod 630 and the top cover 620, and a proper design theoretical height 'Lz' is further determined;
s3, determination of the final design theoretical height Lz: the processed verification sample piece is installed in the side hole 611 of the box body, the top cover 620 is placed, the top cover 620 is connected with the ball stud gland 710 in a propping mode, at the moment, the bolt ejector rod 630 is rotated first, when the bolt ejector rod 630 drives the top cover 620 to move towards one side close to the ball stud gland 710, the top cover 620 pushes the ball stud gland 710 to move for a distance towards one side close to the limiting step 734, then the ball stud 740 of the verification sample piece is in transmission connection with the telescopic coupling 500, and the right end of the telescopic coupling 500 is locked.
S4, starting the torque sensor 410, the speed regulating motor 210 and the motor digital display speed regulator 220, finely adjusting the bolt ejector rod 630 according to the torque displayed on the side display area 411 on the torque sensor 410, enabling the ball pin seat 720 to tightly hold the ball pin 740, increasing the rotating torque of the ball pin 740 to a proper preset torque, waiting for the torque attenuation for 1-2 days, and then finely adjusting the bolt ejector rod 630 until the rotating torque of the ball pin 740 is stabilized at the preset torque.
In step S4, if the ball joint 730 rotates relative to the box 610, the ball joint 730 is locked by turning the set screw 640.
S5, calculating the design theoretical height Lz: finally, the dimension L1 is measured by a vernier caliper, and the final design theoretical height Lz can be calculated through L1, wherein the calculation formula is as follows: Δ S = L1-L3-L2, Lz = δ + Δs.
The durability test of the ball pin assembly comprises a durability test before riveting and a durability test after riveting, wherein the durability test before riveting comprises the following steps:
q1, mounting the pre-clinched ball stud assembly 700 on the ball stud assembly design verification and durability test platform.
Q2, starting the torque sensor 410, the speed regulating motor 210 and the motor digital display speed regulator 220, enabling the speed regulating motor 210 to rotate at a certain rotating speed, then finely adjusting the bolt ejector rod 630, enabling the ball pin seat 720 to tightly hold the ball pin 740 to increase the rotating torque of the ball pin 740 to a proper position, waiting for 1-2 days of torque attenuation, and then finely adjusting the bolt ejector rod 630 until the rotating torque of the ball pin 740 is stabilized at the proper position.
Q3, finally enabling the speed regulating motor 210 to rotate for a long time at a constant rotating speed, monitoring the torque value in real time, and judging the durability of the ball stud assembly 700 before riveting.
The durability test after riveting comprises the following steps:
h1, mounting the riveted ball stud assembly 700 (shown in fig. 6) on the ball stud assembly design verification and durability test platform, and after the mounting is completed, as shown in fig. 1.
H2, and then fine-tuning bolt ejector 630 to make top cap 620 tightly press ball stud gland 710.
H3, starting the speed regulating motor 210 to rotate for a long time at a constant rotating speed, monitoring the torque value in real time by the torque sensor 410 at the moment, and judging the durability of the ball stud assembly 700 after riveting.
In step H3, if the ball joint 730 rotates relative to the box 610, the ball joint 730 is locked by turning the set screw 640.
It will be apparent to those skilled in the art from this disclosure that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a ball stud assembly design is verified and durability test platform, includes fixed platform (100), installs speed governing motor subassembly (200), dynamic torque sensor subassembly (400) and ball stud debugging case (600) on fixed platform (100) from left to right in proper order, its characterized in that: a coupler (300) is installed between the speed regulating motor assembly (200) and the dynamic torque sensor assembly (400), a ball pin assembly (700) is installed in the ball pin debugging box (600), and a telescopic coupler (500) is installed between the dynamic torque sensor assembly (400) and the ball pin debugging box (600).
2. The ball stud assembly design validation and durability test platform of claim 1, wherein: the speed regulation motor assembly (200) comprises a speed regulation motor (210), a motor support (230) is installed below the speed regulation motor (210), the motor support (230) is fixedly installed on the fixed platform (100), a motor digital display speed regulator (220) is arranged on one side of the speed regulation motor (210), and the motor digital display speed regulator (220) is electrically connected with the speed regulation motor (210).
3. The ball stud assembly design validation and durability test platform of claim 2, wherein: the dynamic torque sensor assembly (400) comprises a torque sensor (410), a sensor fixing seat (420) is fixedly installed below the torque sensor (410), the sensor fixing seat (420) is fixedly installed on a fixed platform (100), and a display area (411) and a sensor serial port (412) are arranged on the torque sensor (410).
4. The ball stud assembly design validation and durability test platform of claim 3, wherein: the ball pin debugging box (600) comprises a box body (610) fixedly mounted on the fixed platform (100), a box body side hole (611) is formed in one side, close to the torque sensor (410), of the box body (610), and a mounting position for mounting the ball pin assembly (700) is arranged at a position, close to the box body side hole (611), in the box body (610).
5. The ball stud assembly design validation and durability test platform of claim 4, wherein: first screw hole has been seted up with the corresponding position department of box side opening (611) on box (610), and first screw hole female connection has bolt ejector pin (630), and the one end rotation that bolt ejector pin (630) is close to box side opening (611) is connected with top cap (620).
6. The ball stud assembly design validation and durability test platform of claim 5, wherein: a second threaded hole is formed in the position, close to the box body side hole (611), of the box body (610), the second threaded hole is communicated with the box body side hole (611), a set screw (640) is connected to the second threaded hole in an internal thread mode, and the axis of the set screw (640) and the axis of the box body side hole (611) are perpendicularly arranged.
7. The ball stud assembly design validation and durability test platform of claim 6, wherein: ball stud assembly (700) includes ball stud joint (730), installs ball stud seat (720) in ball stud joint (730), installs ball stud (740) in ball stud seat (720), installs ball stud gland (710) in ball stud joint (730), and ball stud gland (710) and ball stud seat (720) top joint are provided with spacing step (734) in ball stud joint (730).
8. A method for using the ball stud assembly design verification and durability test platform based on claim 7, characterized in that: 1. size definition:
and Lz: the design theoretical height of the limiting step (734) from the sphere center of the ball head pin joint (730);
l: distance from the ball stud gland (710) to the ball center of the ball stud joint (730);
δ: the actual distance between the limiting step (734) and the sphere center of the ball head pin joint (730);
Δ S: is a reserved compressed size;
l1: the distance between the rear end surface of the top cover (620) and the front end surface of the box body (610);
l2: the distance between the rear end face of the top cover (620) and the front end face of the ball stud gland (710);
l3: the distance between the limiting step (734) and the front end face of the box body (610);
the using method comprises the steps of verifying the design theoretical height Lz and the durability test of the ball pin assembly;
verifying the design theoretical height Lz comprises the following steps:
s1, designing the overall structure size of the ball stud assembly (700), wherein after the design is finished, the sizes delta, L2 and L3 are known sizes after the design;
s2, processing a verification sample, wherein the verification sample is processed according to the overall size of the designed ball pin assembly (700), and the size delta of the verification sample is smaller than the design theoretical height Lz; the dimension L is greater than the design theoretical height Lz;
s3, determination of the final design theoretical height Lz: the processed verification sample piece is arranged in a side hole (611) of the box body, a bolt ejector rod (630) is rotated to enable a top cover (620) to push a ball pin gland (710) to move a certain distance to one side close to a limiting step (734), and then a ball pin (740) of the verification sample piece is in transmission connection with a telescopic coupling (500);
s4, starting a torque sensor (410), a speed regulating motor (210) and a motor digital display speed regulator (220), finely adjusting a bolt ejector rod (630) to increase the rotating torque of the ball pin (740) to a preset torque according to the torque displayed on the torque sensor (410), waiting for 1-2 days for the torque to be attenuated, and then finely adjusting the bolt ejector rod (630) until the rotating torque of the ball pin (740) is stabilized at the preset torque;
s5, calculating the design theoretical height Lz: the final design theoretical height Lz can be calculated by measuring the dimension L1 by using a vernier caliper and L1, and the calculation formula is as follows: Δ S = L1-L3-L2, Lz = δ + Δs.
9. The method of claim 8, wherein the method comprises the steps of: the durability test of the ball pin assembly comprises the following durability test before riveting:
q1, mounting the ball stud assembly (700) before riveting on the ball stud assembly design verification and durability test platform;
q2, a starting torque sensor (410), a speed regulating motor (210) and a motor digital display speed regulator (220) to enable the speed regulating motor (210) to rotate at a certain rotating speed, then finely adjusting the bolt ejector rod (630) to increase the rotating torque of the ball stud (740) to a preset torque, waiting for 1-2 days for the torque attenuation, and then finely adjusting the bolt ejector rod (630) until the rotating torque of the ball stud (740) is stabilized at the preset torque;
q3, finally enabling the speed regulating motor (210) to rotate for a long time at a constant rotating speed, monitoring the torque value in real time, and judging the durability of the ball pin assembly (700) before riveting.
10. The method for using a ball stud assembly design verification and durability test platform of claim 9, wherein: the durability test of the ball stud assembly further comprises a durability test after riveting:
h1, mounting the riveted ball stud assembly (700) on a ball stud assembly design verification and durability test platform;
h2, finely adjusting the bolt ejector rod (630) to enable the top cover (620) to tightly push the ball pin gland (710);
h3, starting the speed regulating motor (210) to rotate at a certain rotating speed for a long time, monitoring the torque value in real time, and judging the durability of the ball pin assembly (700) after riveting.
Priority Applications (1)
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