CN111940614A - Riveting quality detection device and method of multi-point riveting machine - Google Patents
Riveting quality detection device and method of multi-point riveting machine Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
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Abstract
The invention relates to a riveting quality detection device and a detection method of a multipoint riveting machine, wherein the detection device comprises: the displacement sensor is used for detecting riveting displacement; the pressure sensor is arranged below the riveting point and used for detecting riveting pressure; and the controller is used for drawing a corresponding relation curve of the riveting displacement and the riveting pressure and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone. According to the technical scheme provided by the invention, the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point are detected, the corresponding relation curve of the riveting displacement and the riveting pressure is drawn for any riveting point, and whether the riveting quality of the riveting point is qualified or not is judged according to the relation between the corresponding relation curve and the tolerance zone of the standard curve, so that the automatic detection of the riveting quality of a plurality of riveting points is realized, the detection efficiency is high, the labor input is low, the user experience is good, and the satisfaction is high.
Description
Technical Field
The invention relates to the technical field of multi-point riveting detection, in particular to a riveting quality detection device and method of a multi-point riveting machine.
Background
The dot riveting technology means that two or more plates are connected together through the riveting technology without punching or riveting. The rivetless riveting technology is characterized in that a concave surface and a convex surface are riveted on a multilayer board through an upper die and a lower die, so that the boards are connected together after being deformed.
The riveting has the advantages of impact resistance, firmness, high efficiency, small connection deformation and the like, and is widely applied to industries of automobiles, spaceflight, household appliances and the like. The connection of parts such as washing machine frame, reinforcer has a large amount of riveted structures, and the quality receives the influence of multiple factors such as panel, rivet, mould, stamping equipment, in case the connection failure problems such as crackle, rivet through, joint strength are not enough, empty riveting will probably cause the complete machine to cave in, serious quality problems such as structural deformation.
At present, riveting quality is monitored by methods such as manual visual inspection or single-point detection and the like after riveting is finished, so that time and labor are wasted, and the detection effect and accuracy are poor.
Disclosure of Invention
In view of the above, the present invention aims to provide a riveting quality detection device and method for a multipoint riveting machine, so as to solve the problems that in the prior art, after riveting is completed, methods such as manual visual inspection or single-point detection are mostly adopted to monitor riveting quality, time and labor are wasted, and detection effect and accuracy are not good.
According to a first aspect of embodiments of the present invention, there is provided a riveting quality detection apparatus of a multipoint riveting machine, including:
the displacement sensor is arranged on a main driving shaft of the multipoint riveting machine and used for detecting riveting displacement;
the pressure sensor is arranged below the riveting point and used for detecting riveting pressure;
and the controller is used for drawing a corresponding relation curve of the riveting displacement and the riveting pressure and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
Preferably, the apparatus further comprises:
the lower female die is fixed on a riveting table of the multi-point riveting machine;
concave cavities with the same number as the riveting points are arranged on the lower concave die;
the number of the pressure sensors is multiple, and one pressure sensor is arranged below each concave cavity;
the controller is specifically configured to draw a corresponding relationship curve of the riveting displacement and the riveting pressure of each riveting point, and judge whether the riveting quality of each riveting point is qualified according to a relationship between the corresponding relationship curve and a tolerance zone of a standard curve.
Preferably, the apparatus further comprises:
and the compression template is arranged above the lower female die and used for fixing the plate to be riveted on the lower female die.
Preferably, the die plate is provided with magnetic steel, and the magnetic steel is used for magnetically attracting the plate to be riveted to the lower female die.
Preferably, the bottom of the lower concave die is provided with a plurality of layers of gaskets,
the gasket is used for buffering the riveting pressure of the multi-point riveting machine.
Preferably, the apparatus further comprises:
and the display is used for displaying the corresponding relation curve, the standard curve tolerance zone and the riveting quality judgment result of the riveting point.
According to a second aspect of the embodiments of the present invention, there is provided a riveting quality detection method of a multipoint riveting machine, including:
detecting the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point;
and drawing a corresponding relation curve of the riveting displacement and the riveting pressure for any riveting point, and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
Preferably, the judging whether the riveting quality of the riveting point is qualified includes:
if the drawn corresponding relation curve falls into the standard curve tolerance zone, judging that the riveting quality of the riveting point is qualified; and/or the presence of a gas in the gas,
and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, judging that the riveting quality of the riveting point is unqualified.
Preferably, the method further comprises:
constructing a three-dimensional riveting model of a plate to be riveted;
and numbering each riveting point on the three-dimensional riveting model, and indicating the riveting state of each riveting point by using indicator lamps with different colors.
Preferably, the three-dimensional riveting model for constructing the plate to be riveted specifically comprises the following steps:
and constructing a three-dimensional riveting model of the plate to be riveted according to the riveting displacement and the riveting pressure of each riveting point.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point are detected, a corresponding relation curve of the riveting displacement and the riveting pressure is drawn for any riveting point, and whether the riveting quality of the riveting point is qualified or not is judged according to the relation between the corresponding relation curve and a standard curve tolerance zone, so that the automatic detection of the riveting quality of the riveting points is realized, the detection efficiency is high, the labor investment is low, the user experience degree is good, and the satisfaction degree is high.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view illustrating a riveting quality detecting apparatus of a multipoint riveting machine according to an exemplary embodiment;
FIG. 2 is an enlarged partial view of a riveting quality detection apparatus of a multi-point riveter according to an exemplary embodiment;
FIG. 3A is a graphical illustration of a correspondence curve for acceptable rivet quality at a rivet joint, according to an exemplary embodiment;
FIG. 3B is a graphical illustration of a correspondence curve for a failed quality rivet joint, according to an exemplary embodiment;
FIG. 4 is a diagram illustrating a riveting quality determination result of a riveting point according to an exemplary embodiment;
fig. 5 is a flowchart illustrating a riveting quality detecting method of a multipoint riveting machine according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram illustrating a riveting quality detecting apparatus of a multipoint riveting machine according to an exemplary embodiment, and as shown in fig. 1, the apparatus includes:
the displacement sensor 1 is arranged on a main driving shaft A of the multipoint riveting machine and used for detecting riveting displacement;
the pressure sensor 2 is arranged below the riveting point B and used for detecting riveting pressure;
and the controller (not shown in the attached drawings) is used for drawing a corresponding relation curve of the riveting displacement and the riveting pressure and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
In fig. 1, C is a fixing plane, and D is a rivet head.
It should be noted that the controller includes but is not limited to: singlechip, microprocessor, PLC controller, DSP controller, FPGA controller etc..
Preferably, the judging whether the riveting quality of the riveting point is qualified includes:
if the drawn corresponding relation curve falls into the standard curve tolerance zone, judging that the riveting quality of the riveting point is qualified; and/or the presence of a gas in the gas,
and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, judging that the riveting quality of the riveting point is unqualified.
Referring to fig. 3A and 3B, if the plotted correspondence curve falls within the standard curve tolerance zone, as shown in fig. 3A, it is determined that the riveting quality of the riveting point is qualified; and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, as shown in fig. 3B, judging that the riveting quality of the riveting point is unqualified.
It should be noted that the standard curve tolerance band is established based on a qualified riveting curve through a large number of repeated riveting test tests.
Referring to fig. 1, a displacement sensor is arranged on a main driving shaft of the multipoint riveting machine, and a riveting head is initially positioned by the displacement sensor before riveting starts. After riveting is started, the displacement of a main driving shaft of the multi-point riveting machine in the vertical direction is monitored by using a displacement sensor, and when the displacement exceeds a set value, the multi-point riveting main driving shaft stops moving, so that a riveting head and a plate to be riveted are protected.
It can be understood that, according to the technical scheme provided by this embodiment, a corresponding relationship curve of the riveting displacement and the riveting pressure is drawn for any riveting point by detecting the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point, and whether the riveting quality of the riveting point is qualified is judged according to the relationship between the corresponding relationship curve and the tolerance zone of the standard curve, so that the automatic detection of the riveting quality of a plurality of riveting points is realized, the detection efficiency is high, the human input is small, the user experience is good, and the satisfaction is high.
Preferably, referring to fig. 2, the apparatus further comprises:
the lower female die 3 is fixed on a riveting table of the multi-point riveting machine;
the lower female die 3 is provided with concave cavities with the same number as the riveting points B;
the number of the pressure sensors 2 is multiple, and one pressure sensor 2 is arranged below each concave cavity;
the controller is specifically configured to draw a corresponding relationship curve of the riveting displacement and the riveting pressure of each riveting point, and judge whether the riveting quality of each riveting point is qualified according to a relationship between the corresponding relationship curve and a tolerance zone of a standard curve.
It can be understood that, in the technical scheme provided in this embodiment, the principle is that signals collected by the displacement sensor and the pressure sensor in the riveting process are converted into voltage value signals (U pressure, U displacement), and then converted into a plurality of corresponding displacement and pressure value points by the controller, so as to draw a displacement-pressure corresponding relationship curve, the corresponding relationship curve drawn by the controller is compared with a standard curve tolerance zone (see fig. 3A and 3B), and if the drawn corresponding relationship curve falls into the standard curve tolerance zone, the riveting quality of the riveting point is determined to be qualified; and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, judging that the riveting quality of the riveting point is unqualified.
Preferably, the apparatus further comprises:
and the die pressing plate 4 is arranged above the lower female die 3 and used for fixing the plate to be riveted on the lower female die 3.
Preferably, the die plate 4 is provided with magnetic steel 5, and the magnetic steel 5 is used for magnetically attracting the plate to be riveted to the lower female die 3.
It will be appreciated that the rivet head of the multi-point riveter of figure 1 corresponds to a punch, the sheet material to be riveted being pressed in between by the die plate, the rivet head then pressing the sheet material into the lower die, thereby completing the riveting.
Preferably, the bottom of the lower concave die 3 is provided with a plurality of layers of gaskets 6,
the gasket 6 is used for buffering the riveting pressure of the multi-point riveting machine.
Preferably, the apparatus further comprises:
and the display (not shown in the attached drawings) is used for displaying the corresponding relation curve, the standard curve tolerance zone and the riveting quality judgment result of the riveting point.
It will be appreciated that the display may also be used to display: the technological parameters of the riveting point are detailed (final pressure, final displacement, judgment result and the like); real-time data detected by a displacement sensor and a pressure sensor; riveting state and alarm data; capacity statistics (according to the product model, the statistics is carried out in a period of 1 day and 24 hours); and displaying the beat of the riveting station equipment and the like.
Fig. 5 is a flowchart illustrating a riveting quality detecting method of a multipoint riveting machine according to an exemplary embodiment, as shown in fig. 5, the method includes:
step S11, detecting the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point;
and step S12, drawing a corresponding relation curve of the riveting displacement and the riveting pressure for any riveting point, and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
It can be understood that, according to the technical scheme provided by this embodiment, a corresponding relationship curve of the riveting displacement and the riveting pressure is drawn for any riveting point by detecting the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point, and whether the riveting quality of the riveting point is qualified is judged according to the relationship between the corresponding relationship curve and the tolerance zone of the standard curve, so that the automatic detection of the riveting quality of a plurality of riveting points is realized, the detection efficiency is high, the human input is small, the user experience is good, and the satisfaction is high.
Preferably, the judging whether the riveting quality of the riveting point is qualified includes:
if the drawn corresponding relation curve falls into the standard curve tolerance zone, judging that the riveting quality of the riveting point is qualified; and/or the presence of a gas in the gas,
and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, judging that the riveting quality of the riveting point is unqualified.
Referring to fig. 3A and 3B, if the plotted correspondence curve falls within the standard curve tolerance zone, as shown in fig. 3A, it is determined that the riveting quality of the riveting point is qualified; and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, as shown in fig. 3B, judging that the riveting quality of the riveting point is unqualified.
It should be noted that the standard curve tolerance band is established based on a qualified riveting curve through a large number of repeated riveting test tests.
It can be understood that the riveting quality detection method provided by the embodiment has the advantages of simple and easy implementation steps, high system response speed, high accuracy, good user experience and high satisfaction.
Preferably, the method further comprises:
constructing a three-dimensional riveting model of a plate to be riveted;
and numbering each riveting point on the three-dimensional riveting model, and indicating the riveting state of each riveting point by using indicator lamps with different colors.
Preferably, the three-dimensional riveting model for constructing the plate to be riveted specifically comprises the following steps:
and constructing a three-dimensional riveting model of the plate to be riveted according to the riveting displacement and the riveting pressure of each riveting point.
It should be noted that, the indication lamps with different colors are used to indicate the riveting state of each riveting point, including but not limited to: in the riveting process: yellow; and (3) qualified riveting: green; unqualified riveting: red; no riveting force is generated: grey, interface as shown in figure 4. It can be understood that, through the technical scheme that this embodiment provided, just can be according to three-dimensional riveting model and riveting point serial number, quick location problem to under the condition that does not use traditional image detection, just can judge fast through grey pilot lamp and have the hourglass problem of riveting, repeated riveting etc..
It can be understood that, the technical scheme provided by the embodiment has the advantages of high detection efficiency, high accuracy, simple operation, easy deployment and implementation, good user experience and high satisfaction.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "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, the schematic representations of the terms used above 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.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a riveting quality detection device of multiple spot riveter which characterized in that includes:
the displacement sensor is arranged on a main driving shaft of the multipoint riveting machine and used for detecting riveting displacement;
the pressure sensor is arranged below the riveting point and used for detecting riveting pressure;
and the controller is used for drawing a corresponding relation curve of the riveting displacement and the riveting pressure and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
2. The apparatus of claim 1, further comprising:
the lower female die is fixed on a riveting table of the multi-point riveting machine;
concave cavities with the same number as the riveting points are arranged on the lower concave die;
the number of the pressure sensors is multiple, and one pressure sensor is arranged below each concave cavity;
the controller is specifically configured to draw a corresponding relationship curve of the riveting displacement and the riveting pressure of each riveting point, and judge whether the riveting quality of each riveting point is qualified according to a relationship between the corresponding relationship curve and a tolerance zone of a standard curve.
3. The apparatus of claim 2, further comprising:
and the compression template is arranged above the lower female die and used for fixing the plate to be riveted on the lower female die.
4. The apparatus of claim 3,
and the pressing template is provided with magnetic steel, and the magnetic steel is used for magnetically attracting the plate to be riveted on the lower female die.
5. The apparatus of claim 2,
the bottom of the lower concave die is provided with a plurality of layers of gaskets,
the gasket is used for buffering the riveting pressure of the multi-point riveting machine.
6. The apparatus of claim 1, further comprising:
and the display is used for displaying the corresponding relation curve, the standard curve tolerance zone and the riveting quality judgment result of the riveting point.
7. A riveting quality detection method of a multi-point riveting machine is characterized by comprising the following steps:
detecting the riveting displacement of the multi-point riveting machine and the riveting pressure at the riveting point;
and drawing a corresponding relation curve of the riveting displacement and the riveting pressure for any riveting point, and judging whether the riveting quality of the riveting point is qualified or not according to the relation between the corresponding relation curve and a standard curve tolerance zone.
8. The method of claim 7, wherein the determining whether the riveting quality of the riveting point is acceptable comprises:
if the drawn corresponding relation curve falls into the standard curve tolerance zone, judging that the riveting quality of the riveting point is qualified; and/or the presence of a gas in the gas,
and if the drawn corresponding relation curve does not fall into the standard curve tolerance zone, judging that the riveting quality of the riveting point is unqualified.
9. The method of claim 7, further comprising:
constructing a three-dimensional riveting model of a plate to be riveted;
and numbering each riveting point on the three-dimensional riveting model, and indicating the riveting state of each riveting point by using indicator lamps with different colors.
10. Method according to claim 9, characterized in that said building of a three-dimensional riveting model of the panels to be riveted is carried out in particular by:
and constructing a three-dimensional riveting model of the plate to be riveted according to the riveting displacement and the riveting pressure of each riveting point.
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| CN202010163601.XA CN111940614A (en) | 2020-03-10 | 2020-03-10 | Riveting quality detection device and method of multi-point riveting machine |
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| CN112798616A (en) * | 2020-12-29 | 2021-05-14 | 贵州博泰自动化科技有限公司 | Nut distinguishing method and system for necking machine |
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