CN111829732A - Hub air tightness detection device and detection method - Google Patents
Hub air tightness detection device and detection method Download PDFInfo
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- CN111829732A CN111829732A CN202010824942.7A CN202010824942A CN111829732A CN 111829732 A CN111829732 A CN 111829732A CN 202010824942 A CN202010824942 A CN 202010824942A CN 111829732 A CN111829732 A CN 111829732A
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- hub
- plugging tool
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/086—Means for indicating or recording, e.g. for remote indication for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/12—Alarms or signals
Abstract
A wheel hub air tightness detection device comprises a servo motor, a transmission assembly, a guide assembly, a vacuum pump, an inflator pump, a box body and a controller, wherein the output end of the servo motor is connected with the transmission assembly after passing through a speed reducer, one end of the guide assembly is clamped at the top of the box body, the other end of the guide assembly is fixedly connected with an upper plugging tool, a lower plugging tool adaptive to the upper plugging tool is arranged under the upper plugging tool, the upper plugging tool and the lower plugging tool are extruded to form an inner cavity for containing a wheel hub, the height of the inner cavity is consistent with that of the side wall of the wheel hub, a first interface connected with the inflator pump is arranged in the middle of the lower plugging tool, a second interface connected with the vacuum pump is further arranged on the lower plugging tool, the first interface is positioned on the inner side of the wheel hub, the second interface is positioned on the outer side of, the invention has the advantages of high detection precision, simple detection operation, high working efficiency and lower detection cost.
Description
Technical Field
The invention relates to the technical field of automobile part manufacturing, in particular to hub air tightness detection equipment and a detection method.
Background
With the vigorous development of the automobile industry, the aluminum alloy wheel hub has wide market prospect as an indispensable part of an automobile. However, since the aluminum alloy wheel hub is cast, sand holes may appear in the casting process, the sand holes are difficult to see by naked eyes, if the sand holes exist in the wheel hub, air leakage is easy to occur after a tire is installed, and the automobile runs at a high speed, so that potential safety hazards exist, and quality safety detection needs to be carried out on the aluminum alloy wheel hub.
At present, the widely adopted aluminum alloy hub air tightness detection methods at home and abroad include a wet air tightness detection method and a helium air tightness detection method. The wet-type air tightness detection method is characterized in that whether bubbles are generated or not is manually identified, the method is low in efficiency and not beneficial to automatic detection, meanwhile, the wet-type air tightness detection method is high in requirement on the capability of workers, and for the generation of continuous obvious bubbles, the existence of sand holes on the surface of the aluminum hub is easily judged, but the bubbles and interference bubbles generated by the small sand holes are difficult to distinguish, so that misjudgment is easily caused, and the detection precision is low. When helium is used for detection, an inert gas-helium and helium mass spectrometer is needed, when helium is used for detection, a hub needs to be placed in a closed space, the inner cavity of the hub is vacuumized, when the vacuum value is small enough, helium with a certain pressure value is filled into the outer side of the hub, and if a leak point exists on a hub rim, helium molecules can pass through the leak point and reach the inner cavity of the hub; because the inner cavity of the hub is in a vacuum environment, the entering helium molecules can be pumped into a helium mass spectrometer, and the helium molecules are detected by the helium mass spectrometer to obtain the number of the helium molecules, so that whether the air tightness of the hub is within an acceptable range is judged. Although the detection method has higher detection precision compared with the bubble method, the helium gas tightness detection method has the following defects in use: 1. the detection equipment adopted by the helium gas tightness detection method is expensive, the helium gas is relatively large in loss in detection, and the helium gas is used as a rare gas and is expensive, so that the overall detection cost is high; 2. the helium exists in the air at a certain concentration, and if the operation is not proper, the helium in the air can be easily detected, so that the detection of the air tightness is not accurate.
Therefore, a detection device and a detection method with high detection precision, simple detection operation, high working efficiency and low detection cost are urgently needed.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention provides equipment and a method for detecting the air tightness of a hub.
The specific technical scheme of the invention is as follows:
a wheel hub air tightness detection device comprises a servo motor, a transmission assembly, a guide assembly, a vacuum pump, an inflator pump, a box body and a controller, wherein the output end of the servo motor is connected with the transmission assembly after passing through a speed reducer, one end of the guide assembly is clamped at the top of the box body, the other end of the guide assembly is fixedly connected with an upper plugging tool, a lower plugging tool adaptive to the upper plugging tool is arranged under the upper plugging tool, the upper plugging tool and the lower plugging tool are extruded to form an inner cavity for containing a wheel hub, the height of the inner cavity is consistent with that of the side wall of the wheel hub, a first interface connected with the inflator pump is arranged in the middle of the lower plugging tool, a second interface connected with the vacuum pump is further arranged on the lower plugging tool, the first interface is positioned on the inner side of the wheel hub, and the second interface is positioned on the outer, the length of the guide component can be extended and contracted.
Furthermore, the transmission assembly comprises a screw rod nut and a transmission push plate, the screw rod nut is fixedly connected with the rotating shaft of the servo motor, the transmission push plate is fixedly connected with the other end of the screw rod nut, and the transmission push plate can move up and down along the guide assembly.
Further, the guide assembly is composed of at least two guide rods.
Furthermore, the bottom surface of the lower plugging tool is connected with the box body through a supporting block.
Furthermore, the diameter of the upper plugging tool and the diameter of the lower plugging tool are 550-800 mm.
Further, the inner side of the hub is provided with an inflation cavity, the outer side of the hub is provided with a vacuum cavity, and the lower plugging tool is provided with a first pressure detector for detecting the pressure of the inflation cavity and a second pressure detector for detecting the pressure of the vacuum cavity.
Furthermore, the power of the servo motor is 7.5KW, and the servo motor is also provided with a pressure sensor and an alarm.
Further, the pressure provided by the servo motor is 10T-20T.
A detection method of hub air tightness detection equipment comprises the following steps:
s1, placing the hub to be detected to be airtight in a lower plugging tool;
s2, starting a servo motor, and pressing the upper plugging tool downwards until the upper plugging tool is overlapped with the lower plugging tool;
s3, the pressure sensor detects pressure signals of the upper plugging tool and the lower plugging tool, the signals are sent to the controller, and after the controller confirms that the upper plugging tool and the lower plugging tool form a sealed inner cavity according to the pressure signals, the controller controls the vacuum pump to vacuumize the vacuum cavity to form a vacuum environment; the controller simultaneously controls the inflator pump to inflate the inflation cavity to form a high-pressure environment;
s4, automatically balancing equipment for 10S;
s5, maintaining the pressure of the equipment for 20S, and simultaneously detecting the pressure intensity of the vacuum cavity in real time through a second pressure detector;
s6, judging whether the air tightness of the hub is qualified or not by judging the stable pressure intensity of the vacuum cavity after pressure maintaining for 20S through the controller, wherein the method comprises the following steps:
a. setting a qualified standard value Z;
b. if the pressure intensity of the vacuum cavity does not exceed Z, judging that the air tightness of the hub is qualified;
c. if the pressure intensity of the vacuum cavity exceeds Z, judging that the air tightness of the hub is unqualified;
s7, if the vacuum degree does not reach the qualified standard, the control panel on the controller displays 'unqualified', and simultaneously controls the alarm to give out alarm sound for warning the staff; if the vacuum degree reaches the qualified standard, a control panel on the controller displays qualified;
and S8, taking out the detected hub, and classifying the qualified hub and the unqualified hub.
Further, the inflation pressure of the inflation cavity after balance is 0.5MPa, the vacuum degree of the vacuum cavity after balance is-70 KPa, and the qualified standard value Z is 90 KPa.
The invention has the beneficial effects that:
(1) according to the invention, the upper plugging tool and the lower plugging tool which are matched with each other are designed, the hub to be detected is placed in the hub, the side wall of the hub, the upper plugging tool and the lower plugging tool form an inflation cavity and a vacuum cavity, then the inflation cavity is inflated through the inflation pump, and the vacuum cavity is vacuumized through the vacuum pump;
(2) according to the invention, by designing the pressure sensor, the alarm and the speed reducer, the pressure between the upper plugging tool, the lower plugging tool and the hub is monitored in real time, so that damage to a product caused by excessive pressure is prevented,
Drawings
Fig. 1 is a schematic structural diagram of a hub airtightness detection apparatus in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a lower plugging tool in the embodiment of the present invention.
FIG. 3 is a schematic structural diagram of a hub in an embodiment of the present invention
Reference numerals: 10-a servo motor, 20-a transmission assembly, 21-a screw rod nut, 22-a transmission push plate, 30-a guide assembly, 40-a vacuum pump, 50-an inflator pump, 60-a box body, 70-a controller, 80-a speed reducer, 90-an upper plugging tool, 100-a lower plugging tool, 101-a first interface, 102-a second interface, 103-a first pressure detector, 104-a second pressure detector, 110-an inner cavity, 120-a support block, 130-a hub, 131-an inflation cavity and 132-a vacuum cavity.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a hub air tightness detection device in an embodiment of the present invention, the hub air tightness detection device includes a servo motor 10, a transmission assembly 20, a guide assembly 30, a vacuum pump 40, an inflator pump 50, a box 60, and a controller 70, an output end of the servo motor 10 is connected to the transmission assembly 20 after passing through a speed reducer 80, one end of the guide assembly 30 is clamped at the top of the box 60, the other end of the guide assembly 30 is fixedly connected to an upper plugging tool 90, a lower plugging tool 100 adapted to the upper plugging tool 90 is arranged right below the upper plugging tool 90, the upper plugging tool 90 and the lower plugging tool 100 are extruded to form an inner cavity 110 for containing a hub 130, a height of the inner cavity 110 is consistent with a height of a side wall of the hub 130, a first interface 101 connected to the inflator pump 50 is arranged in a middle portion of the lower plugging tool, the lower plugging tool 100 is further provided with a second interface 102 connected with the vacuum pump 40, the first interface 101 is located on the inner side of the hub 130, the second interface 102 is located on the outer side of the hub 130, and the guide assembly 30 is telescopic in length.
In some preferred embodiments, the transmission assembly includes a screw nut 21 and a transmission push plate 22, the screw nut 21 is fixedly connected to the rotating shaft of the servo motor 10, the transmission push plate 22 is fixedly connected to the other end of the screw nut 21, and the transmission push plate 22 can move up and down along the guide assembly 30.
In certain preferred embodiments, the guide assembly 30 is comprised of at least two or more guide rods.
In some preferred embodiments, the bottom surface of the lower plugging tool 100 is connected to the box 60 through the supporting block 120.
In certain preferred embodiments, the diameters of the upper plugging tool 90 and the lower plugging tool 100 are 550 to 800 mm.
In some preferred embodiments, the inner side of the hub 130 is an inflation cavity 131, the outer side of the hub 130 is a vacuum cavity 132, and the lower plugging tool 100 is provided with a first pressure detector 103 for detecting the pressure of the inflation cavity 131 and a second pressure detector 104 for detecting the pressure of the vacuum cavity 132.
In certain preferred embodiments, the servo motor 10 has a power of 7.5KW, and the servo motor 10 also carries a pressure sensor and an alarm.
In some preferred embodiments, the servo motor provides a pressure of 10T to 20T.
A detection method of hub air tightness detection equipment comprises the following steps:
s1, placing the hub to be detected to be airtight in a lower plugging tool;
s2, starting a servo motor, and pressing the upper plugging tool downwards until the upper plugging tool is overlapped with the lower plugging tool;
s3, the pressure sensor detects pressure signals of the upper plugging tool and the lower plugging tool, the signals are sent to the controller, and after the controller confirms that the upper plugging tool and the lower plugging tool form a sealed inner cavity according to the pressure signals, the controller controls the vacuum pump to vacuumize the vacuum cavity to form a vacuum environment; the controller simultaneously controls the inflator pump to inflate the inflation cavity to form a high-pressure environment;
s4, automatically balancing equipment for 10S;
s5, maintaining the pressure of the equipment for 20S, and simultaneously detecting the pressure intensity of the vacuum cavity in real time through a second pressure detector;
s6, judging whether the air tightness of the hub is qualified or not by judging the stable pressure intensity of the vacuum cavity after pressure maintaining for 20S through the controller, wherein the method comprises the following steps:
d. setting a qualified standard value Z;
e. if the pressure intensity of the vacuum cavity does not exceed Z, judging that the air tightness of the hub is qualified;
f. if the pressure intensity of the vacuum cavity exceeds Z, judging that the air tightness of the hub is unqualified;
s7, if the vacuum degree does not reach the qualified standard, the control panel on the controller displays 'unqualified', and simultaneously controls the alarm to give out alarm sound for warning the staff; if the vacuum degree reaches the qualified standard, a control panel on the controller displays qualified;
and S8, taking out the detected hub, and classifying the qualified hub and the unqualified hub.
In some preferred embodiments, the inflation pressure after the inflation chamber is equilibrated is 0.5MPa, the vacuum degree after the vacuum chamber is equilibrated is-70 KPa, and the qualification value Z is 90 KPa.
The inspection principle of the invention is that the vacuum chamber is vacuumized, the inflation chamber is inflated, positive and negative pressure is formed inside and outside the side wall of the hub, then the equipment is balanced for 10s and kept for 20s, the pressure value of the vacuum chamber is detected by the second pressure detector, and if the air tightness of the hub is qualified, the detection result of the vacuum chamber does not exceed the qualified standard value.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. The utility model provides a wheel hub gas tightness check out test set which characterized in that: comprises a servo motor, a transmission component, a guide component, a vacuum pump, an inflator pump, a box body and a controller, the output end of the servo motor is connected with the transmission assembly after passing through the speed reducer, one end of the guide assembly is clamped at the top of the box body, the other end of the guide component is fixedly connected with an upper plugging tool, a lower plugging tool matched with the upper plugging tool is arranged right below the upper plugging tool, the upper plugging tool and the lower plugging tool are extruded to form an inner cavity for containing the wheel hub, the height of the inner cavity is consistent with that of the side wall of the wheel hub, the middle part of the lower plugging tool is provided with a first interface connected with the inflator pump, the lower plugging tool is also provided with a second interface connected with the vacuum pump, the first interface is located the inboard of wheel hub, the second interface is located the outside of wheel hub, the length of direction subassembly is scalable.
2. A hub airtightness detection apparatus according to claim 1, wherein: the transmission assembly comprises a screw rod nut and a transmission push plate, the screw rod nut is fixedly connected with a rotating shaft of the servo motor, the transmission push plate is fixedly connected with the other end of the screw rod nut, and the transmission push plate can move up and down along the guide assembly.
3. A hub airtightness detection apparatus according to claim 1, wherein: the guide assembly is composed of at least more than two guide rods.
4. A hub airtightness detection apparatus according to claim 3, wherein: the bottom surface of the lower plugging tool is connected with the box body through a supporting block.
5. A hub airtightness detection apparatus according to claim 4, wherein: the diameters of the upper plugging tool and the lower plugging tool are 550-800 mm.
6. A hub airtightness detection apparatus according to claim 5, wherein: the inner side of the hub is provided with an inflation cavity, the outer side of the hub is provided with a vacuum cavity, and the lower plugging tool is provided with a first pressure detector for detecting the pressure of the inflation cavity and a second pressure detector for detecting the pressure of the vacuum cavity.
7. A hub airtightness detection apparatus according to claim 1, wherein: the power of the servo motor is 7.5KW, and the servo motor is also provided with a pressure sensor and an alarm.
8. The hub airtightness detection apparatus according to claim 7, wherein: the pressure provided by the servo motor is 10T-20T.
9. The detection method of the wheel hub air tightness detection equipment is characterized by comprising the following steps of:
s1, placing the hub to be detected to be airtight in a lower plugging tool;
s2, starting a servo motor, and pressing the upper plugging tool downwards until the upper plugging tool is overlapped with the lower plugging tool;
s3, the pressure sensor detects pressure signals of the upper plugging tool and the lower plugging tool, the signals are sent to the controller, and after the controller confirms that the upper plugging tool and the lower plugging tool form a sealed inner cavity according to the pressure signals, the controller controls the vacuum pump to vacuumize the vacuum cavity to form a vacuum environment; the controller simultaneously controls the inflator pump to inflate the inflation cavity to form a high-pressure environment;
s4, automatically balancing equipment for 10S;
s5, maintaining the pressure of the equipment for 20S, and simultaneously detecting the pressure intensity of the vacuum cavity in real time through a second pressure detector;
s6, judging whether the air tightness of the hub is qualified or not by judging the stable pressure intensity of the vacuum cavity after pressure maintaining for 20S through the controller, wherein the method comprises the following steps:
a. setting a qualified standard value Z;
b. if the pressure intensity of the vacuum cavity does not exceed Z, judging that the air tightness of the hub is qualified;
c. if the pressure intensity of the vacuum cavity exceeds Z, judging that the air tightness of the hub is unqualified;
s7, if the vacuum degree does not reach the qualified standard, the control panel on the controller displays 'unqualified', and simultaneously controls the alarm to give out alarm sound for warning the staff; if the vacuum degree reaches the qualified standard, a control panel on the controller displays qualified;
and S8, taking out the detected hub, and classifying the qualified hub and the unqualified hub.
10. The inspection method of an air-tightness inspection apparatus for a hub according to claim 9, wherein: the inflation pressure of the inflation cavity after balance is 0.5MPa, the vacuum degree of the vacuum cavity after balance is-70 KPa, and the qualified standard value Z is 90 KPa.
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| CN202010824942.7A CN111829732A (en) | 2020-08-17 | 2020-08-17 | Hub air tightness detection device and detection method |
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| CN202010824942.7A CN111829732A (en) | 2020-08-17 | 2020-08-17 | Hub air tightness detection device and detection method |
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| CN208520533U (en) * | 2018-08-09 | 2019-02-19 | 张家港市创华智能设备有限公司 | A kind of wheel hub tightness test device |
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| CN209503425U (en) * | 2019-01-02 | 2019-10-18 | 金华市捷欣智能科技有限公司 | A kind of stator bearing with end cover press-fit equipment |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070056356A1 (en) * | 2004-08-11 | 2007-03-15 | Tony Brock | Apparatus and method for providing a test tee |
| CN205373988U (en) * | 2016-02-29 | 2016-07-06 | 四川跃镁镁业科技有限公司 | Magnadure wheel hub gas tightness detection device |
| CN106370361A (en) * | 2016-08-24 | 2017-02-01 | 内蒙古华唐伟业再生资源有限公司 | Aluminum alloy wheel hub key technological parameter detection system |
| CN208520533U (en) * | 2018-08-09 | 2019-02-19 | 张家港市创华智能设备有限公司 | A kind of wheel hub tightness test device |
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Application publication date: 20201027 |
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