CN118055814A - Riveting die and riveting equipment - Google Patents

Abstract

The embodiment of the application provides a riveting die and riveting equipment, wherein the riveting die comprises a concave table, at least a first part and a second part, the first part and the second part are enclosed to form the concave table, the concave table is provided with a cavity, one end of the cavity is provided with an opening, and the concave table is used for riveting a riveting piece; wherein the first and second members are separable to disengage the rivet from the recess. According to the technical scheme, the riveting piece is favorably and smoothly demoulded.

Description

Riveting die and riveting equipment Technical Field

The application relates to the technical field of riveting, in particular to a riveting die and riveting equipment.

Background

The self-piercing riveting is used as a novel cold working connection technology for plates, and the purpose of connecting riveting pieces is achieved by forming a mechanical inner lock through plastic large deformation of the plates. In order to smoothly demoulding the riveted part after riveting, most riveting dies currently set a cavity into a cylindrical shape or an inverted circular truncated cone shape, but the cavity structure can cause the conditions that the interlocking value is smaller after riveting and the residual thickness of the material is insufficient, so that the riveted part is easy to break or trip in the use process.

Therefore, there is a need for a riveting die structure that can smoothly release a rivet after completion of riveting while ensuring the riveting quality.

Disclosure of Invention

The application provides a riveting die and riveting equipment, which are beneficial to smooth demoulding after riveting of a riveting piece is finished.

In a first aspect, the present application provides a riveting die comprising: the concave table comprises at least a first component and a second component, the first component and the second component are enclosed to form the concave table, the concave table is provided with a cavity, one end of the cavity is provided with an opening, and the concave table is used for riveting a riveting piece; wherein the first and second members are separable to disengage the rivet from the recess.

According to the technical scheme, the riveting die is arranged into two or more separable structures, so that all parts of the riveting die are mutually separated after riveting is finished, the size of the cavity can be changed, and smooth demoulding of the riveting part is facilitated.

In some embodiments, the riveting die further comprises a drive mechanism for driving the first and/or second members to separate or approach each other.

It should be noted that, when the riveting piece is riveted, the driving mechanism drives the first component and the second component to approach each other to form a closed riveting die structure so as to ensure normal operation of riveting work. After the riveting piece is riveted, the driving mechanism drives the first component and the second component to be mutually separated, so that the riveted riveting piece is smoothly and rapidly separated from the riveting die, and continuous automatic riveting of the riveting equipment is ensured.

In some embodiments, the riveting die further comprises: and the supporting piece is positioned below the concave table and is used for supporting the concave table and the driving mechanism.

In the above embodiment, by providing the supporting member, the concave table and the driving mechanism can be supported and the riveting die 10 is integrated into an integral structure, which is beneficial to reducing the assembly difficulty of the riveting die and other devices.

In some embodiments, the support is provided with a sliding rail, at least one of the first part and the second part is movably arranged on the sliding rail, and the driving mechanism is used for driving the first part and/or the second part to move on the sliding rail.

The above embodiment is a manner of bringing the first member and the second member close to and apart from each other.

In the above embodiment, the driving mechanism is matched with the sliding rail, so that the first component and the second component are driven to be separated from each other after the riveting piece is riveted, so that the riveting piece is smoothly released from the riveting die 10. In addition, the first part and the second part can be smoothly separated in a sliding way through the sliding rail, so that the stability of the riveting die structure is improved.

In some embodiments, the support member includes a fixing member, the fixing member protrudes from a side of the support member near the concave table, the fixing member is spaced from the first member and/or the second member, one end of the driving mechanism is connected to the fixing member, and the other end of the driving mechanism is connected to the first member and/or the second member.

In the above embodiment, if the support member includes only the part located under the concave table, the driving mechanism forms an included angle with the first part or the second part, and when the included angle is smaller, a larger driving force is required to separate the first part from the second part, so when the support member includes a fixing member protruding toward the concave table, and one end of the driving mechanism is connected to the fixing member, the included angle between the driving mechanism and the concave table can be effectively increased, and the required driving force is reduced to separate the first part from the second part.

In some embodiments, the drive mechanism is a spring, the drive mechanism comprising: one end of the first elastic piece is connected with the first component, and the other end of the first elastic piece is connected with the fixing piece; and/or a second elastic member, one end of which is connected with the second part, and the other end of which is connected with the fixing member.

It should be appreciated that after the riveting member completes the riveting, the first elastic member and/or the second elastic member drives the first component and/or the second component to separate from each other via the sliding rail, so that the riveting member is disengaged from the riveting die. After the riveting piece is demolded, the first elastic piece and/or the second elastic piece drive the first component and/or the second component to mutually approach through the sliding rail to form a closed concave table, and the next round of riveting work is waited.

According to the embodiment, the split riveting die structure is matched with the sliding rail and the elastic piece, so that the concave table is opened when the riveting piece is taken out, smooth and rapid demoulding of the riveting piece is facilitated, in addition, the elastic piece has the characteristics of stress compression and no stress rebound, and automatic riveting can be realized only by the elastic piece without other driving equipment.

In some embodiments, the first elastic member and/or the second elastic member are in a compressed state when the first member and the second member are separated.

In the above embodiment, when the first component and the second component are separated, the first elastic member and/or the second elastic member is in a compressed state, and can automatically rebound after demolding is completed, so that automatic riveting is realized.

In some embodiments, the first elastic member and/or the second elastic member are parallel to the slide rail.

In the above embodiment, when the first elastic member and/or the second elastic member are parallel to the sliding rail, the angle between the connection point of the first elastic member and/or the second elastic member and the concave table is 90 degrees, which is most favorable for separating and approaching the first component and the second component.

In some embodiments, the riveting die comprises: a first shaft for rotatably connecting the support and the first member; and/or a second shaft for rotatably connecting the support and the second member.

The above embodiment is another way of bringing the first and second members closer to and farther from each other.

It should be appreciated that in the above embodiment, after the riveting member completes riveting, the driving mechanism drives the first component and/or the second component to separate from each other through the first rotating shaft and/or the second rotating shaft, so that the riveting member can be disengaged from the recess table. After the riveting piece is demolded, the driving mechanism drives the first component and/or the second component to approach each other through the rotating shaft to form a complete concave table, and the next round of riveting work is waited for, so that automatic riveting is realized.

In some embodiments, the drive mechanism is disposed between the first component and the support to cooperate with the first shaft to separate the first component from the second component; and/or the driving mechanism is arranged between the second component and the supporting piece so as to be matched with the second rotating shaft to separate the first component from the second component.

Through the mutually supporting of actuating mechanism and first pivot and/or second pivot, can make the riveting piece after the riveting is accomplished, first part and second part mutually separated to realize the smooth drawing of patterns of riveting piece.

In some embodiments, the drive mechanism further comprises: one end of the third elastic piece is connected with one end of the first component close to the opening, and the other end of the third elastic piece is connected with the supporting piece; and/or a fourth elastic member having one end connected to one end of the second member adjacent to the opening and the other end connected to the supporting member.

It should be appreciated that when one end of the third elastic member is connected to the end of the first member adjacent to the opening and/or one end of the fourth elastic member is connected to the end of the second member adjacent to the opening, it is advantageous for the third elastic member and/or the fourth elastic member to compress after the riveting is completed to expand the opening through the corresponding rotation shaft, and at the same time, the riveting member is ejected out from the bottom of the cavity.

According to the embodiment, the split riveting die structure is matched with the first rotating shaft and/or the second rotating shaft, so that the riveting die can be opened when the riveting piece is taken out, and smooth and rapid demoulding of the riveting piece is facilitated.

In some embodiments, the third and/or fourth elastic members are in a compressed state when the first and second members are separated.

It will be appreciated that when the first and second members are separated, the third and/or fourth resilient members are in a compressed state and may spring back automatically after riveting is completed, enabling automated riveting.

It should be noted that, in the present application, the sliding rail and the rotating shaft on the support member may exist at the same time, which is another way to make the first member and the second member approach to and separate from each other. Specifically, after the riveting piece is riveted, the first component and the second component are driven to be separated from each other through the sliding rail and the rotating shaft under the action of the driving mechanism, so that the demoulding process of the riveting piece is completed. After demoulding, the first part and the second part are driven to approach each other through the sliding rail and the rotating shaft under the action of the driving component.

In some embodiments, the cross-section of the cavity in the depth direction is a trapezoid, and a base angle of the trapezoid away from the opening is an acute angle.

It is understood that according to the technical scheme, the bottom angle of the trapezoid far away from the opening of the cavity is set to be an acute angle, so that more riveting piece materials can flow into the bottom angle of the trapezoid after riveting, the interlocking value of upper and lower plates in the riveting piece is effectively improved, and the riveting quality of the riveting piece is improved.

In some embodiments, the trapezoid is an isosceles trapezoid.

In the above embodiment, when the trapezoid cross section in the depth direction of the cavity is isosceles trapezoid, the materials flowing into the bottom corner after the riveting piece is riveted are the same everywhere, so that the connection strength of the riveting buckle everywhere is the same, and the riveting quality is further improved.

In some embodiments, the base angle is 45-85 degrees.

In the embodiment, when the angle of the trapezoid away from the opening is set to be 45-85 degrees, the riveting industrial process is facilitated on one hand, and the riveting quality of the riveting piece is improved on the other hand. Specifically, when the base angle is smaller than 45 degrees, insufficient filling of the base angle may occur after the riveting piece material is extruded into the base angle due to different ductility of different riveting pieces, which is not beneficial to the industrial process of riveting. When the base angle is larger than 85 degrees, the interlocking value of the riveting piece is smaller, and the riveting quality is not ideal.

In a second aspect, the present application provides a riveting apparatus, including the riveting die and the rivet head according to the first aspect, wherein the rivet head is disposed on a side of the riveting die where the recess is disposed, and is used for riveting the riveting member in the recess.

According to the embodiment, the riveting piece is pressed into the riveting die by utilizing the pressure of the riveting head in the riveting process, and the rust-proof coating or paint layer of the riveting piece can deform and flow along with the riveting piece, so that the surface of the riveting piece is not damaged, and the corrosion resistance and strength of the riveting piece at the connecting point are not affected.

In some embodiments, the rivet head includes a protrusion disposed at a bottom end of the rivet head, the protrusion being configured to press the rivet into the recess.

It should be appreciated that when the riveting piece is pressed into the recess by the rivet joint in the riveting process, the width of the rivet joint is limited by the width of the opening of the cavity, so that the bottom end of the rivet joint is provided with the protruding part, and the riveting piece is pressed into the recess by the protruding part. Through set up the bulge in the rivet joint bottom, can set up the size of bulge in a flexible way according to the open-ended width of cavity.

In some embodiments, the cross section of the protruding portion in the depth direction is trapezoid, and a bottom angle away from the rivet joint is an obtuse angle.

According to the embodiment, the trapezoid bottom angle is set to be an obtuse angle, and compared with the case that the bottom angle is set to be a right angle or an acute angle, the upper plate of the riveting piece is more in residual materials after riveting, namely the thickness value of the residual materials is larger, and the riveting quality is improved.

In some embodiments, the cross-section of the protrusion in the depth direction is isosceles trapezoid.

According to the embodiment, when the cross section of the protruding part in the depth direction is isosceles trapezoid, after the riveting piece is riveted, the riveting thickness is the same everywhere, so that the connection strength of the riveting buckle is improved, and the riveting quality is improved.

In some embodiments, the maximum radial dimension of the projection is less than the width of the opening.

It will be appreciated that in order to press the rivet into the recess with the projection of the rivet head, the maximum radial dimension of the projection is smaller than the width of the opening.

According to the technical scheme, the riveting die is arranged to be of two or more than two separable structures, and the riveting piece is quickly and smoothly demoulded after riveting is completed by matching with the rotating shaft and/or the sliding rail. Further, the cavity of the riveting die is set to be of a positive trapezoid structure, the interlocking value between the upper plate and the lower plate of the riveted part after riveting can be increased, the protruding portion of the riveting head is set to be of an inverted trapezoid structure, the thickness of the residual material can be increased, and therefore riveting quality of the riveted part is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a rivetless self-piercing rivet connection joint.

FIG. 2 is a schematic view of a riveting die according to an embodiment of the present application;

FIG. 3 is a schematic view of another riveting die according to an embodiment of the present application;

FIG. 4 is a schematic view showing a structure of a riveting die according to another embodiment of the present application;

FIG. 5 is a schematic view showing a structure of a riveting apparatus according to an embodiment of the present application;

In the drawings, the drawings are not drawn to scale.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

In order to reduce the weight of the automobile body and realize the weight reduction effect, the automobile body is energy-saving and emission-reducing, and new light plates such as aluminum alloy, magnesium alloy and composite materials are gradually adopted to replace the steel plate. However, the conventional material connection technology, such as electric welding, laser welding, etc., is difficult to achieve connection of new light plates due to the factors of excessive cost, poor weldability, etc. The self-piercing riveting is used as a novel cold working connection technology for plates, and the purpose of connecting the plates is achieved by forming a mechanical inner lock through plastic large deformation of the plates. The self-piercing riveting can be classified into two forms of self-piercing riveting with or without rivets and self-piercing riveting without rivets. The riveting self-piercing riveting comprises the steps that rivets penetrate through an upper layer plate and a lower layer plate or penetrate through the upper layer plate but not penetrate through the lower layer plate through a pressure head, and then the rivets are turned over to the periphery to form a rivet button under the combined action of a punch and a riveting die, so that the upper plate and the lower plate form a mechanical inner locking structure; the rivet-free self-punching (clinching) riveting is realized by utilizing a rivet joint to match with a riveting die, and the upper connecting plate and the lower connecting plate form mechanical interlocking through the punching pressure. After riveting is completed, the interlocking value and the residual thickness of the material are important indexes for measuring the riveting quality. Taking clinching riveting as an example, fig. 1 is a schematic diagram of a clinching riveted joint, wherein the upper plate 111 and the lower plate 222 of the riveted member are riveted to form the riveted joint, and m is a riveted interlocking value. n is the residual thickness of the riveted material.

In order to facilitate smooth demoulding of the riveted part after riveting, most of the cavity of the riveting die is in a cylindrical shape or an inverted circular truncated cone shape at present, but the cavity can cause small interlocking value after riveting, and the residual thickness of the material is insufficient, so that the riveted part is easy to break or trip in the use process.

In view of this, the application provides a separable riveting die which is beneficial to smooth demoulding after riveting a riveting piece.

According to some embodiments of the present application, referring to fig. 2, 3 and 4, a riveting die 10 provided in an embodiment of the present application includes a recess table 1, at least a first part 11 and a second part 12 of the recess table 1, where the first part 11 and the second part 12 enclose to form the recess table 1, and the recess table 1 is provided with a cavity 13, one end of the cavity 13 has an opening, and the recess table 1 can be used for riveting a riveting member 30, where the first part 11 and the second part 12 can be separated to enable the riveting member 30 to be separated from the recess table 1.

In the present application, the rivet 30 may include at least one upper plate 31 and at least one lower plate 32.

The caulking work of the caulking member 30 is performed when the first member 11 and the second member 12 are enclosed in a closed state. Fig. 2 only shows that the riveting die 10 is designed into two split structures, namely, the first part 11 and the second part 12, although not shown, the riveting die 10 provided by the application can also comprise three or more split structures, all of which are enclosed to form the concave table 1, and are separated after the riveting is completed, so that the riveting piece 30 can be smoothly separated from the riveting die 10.

The upper surface of the recess 1 may be planar for placing the rivet 30. The side surface of the concave table 1 may be a plane surface or an arc surface, which is not limited in the present application. The cavity 13 has an opening at one end, and it is understood that a groove is provided from the center of the upper surface of the concave table 1, and the groove may be any geometric body, for example, a cuboid, a cylinder, a round table, etc., which is not limited in the present application.

The first member 11 and the second member 12 being separable may mean that the first member 11 and the second member 12 are completely separated, or that a portion of the first member 11 and the second member 12 are separated from each other, for example, the first member 11 and the second member 12 may be separated in an open state, i.e., with the top open and the bottom still in contact. The first part 11 and the second part 22 may be separated both actively and passively. Wherein the active separation may be, for example, after the riveting is completed, driving the first component 11 and the second component 12 to separate from each other automatically by using other components; the passive separation may be, for example, after the completion of the riveting, the riveting member is returned upward to push the first member 11 and the second member 12 apart.

The structure of the separable riveting die 10 provided by the application is beneficial to smoothly demoulding the riveting piece 30 from the riveting die 10 after riveting is completed.

In some embodiments, the riveting die 10 further comprises a driving mechanism 2, the driving mechanism 2 being configured to drive the first part 11 and the second part 12 apart from or towards each other.

It should be appreciated that when the rivet 30 is being riveted, the drive mechanism 2 drives the first and second members 11, 12 toward each other to form a closed riveting die 10 configuration to ensure proper operation of the riveting operation. After the riveting piece 30 is riveted, the driving mechanism 2 drives the first component 11 and the second component 12 to be separated from each other so as to ensure that the riveted riveting piece 30 is smoothly and quickly separated from the riveting die 10; after the riveting member 30 completes the riveting, the driving mechanism 2 drives the first component 11 and the second component 12 to approach each other, so as to ensure that the riveting die 10 realizes continuous automatic riveting.

It should also be appreciated that when the drive mechanism 2 drives the first and second members 11, 12 apart from each other, only the first member 11 may be driven away from the second member 12 to separate the first and second members 11, 12 from each other; it is also possible to drive only the second part 12 away from the first part 11 so that the first part 11 and the second part 12 are separated from each other; of course, in order to enhance the demolding effect, the first member 11 and the second member 12 may be driven simultaneously, so that the first member 11 and the second member 12 are separated from each other, which is not limited to this application.

For example, the driving mechanism 2 may be a driving member such as a motor, a hydraulic cylinder, a cylinder, etc., and in order to implement riveting automation, the efficiency of the driving member may be set according to the demand for riveting efficiency or speed. When the driving mechanism 2 is a driving member, the driving mechanism 2 further comprises a connecting member, such as a connecting shaft, a connecting rod, a telescopic rod, etc., for connecting the driving member and the first member 11 or the second member 12, and the driving mechanism 2 may further comprise a driving circuit, etc.

Further, the driving mechanism 2 may be an elastic member such as a spring or an elastic band. To automate the riveting, the first part 11 and the second part 12 are in a compressed state when they are separated so that the riveting is completed and leaves the riveting die 10, the elastic member automatically rebounds to drive the first part 11 and the second part 12 to approach each other, forming a closed riveting die 10 structure waiting for the next riveting 30.

Optionally, in some embodiments of the present application, the riveting die 10 further includes a support member 3 located below the recess table 1 for supporting the recess table 1 and the driving mechanism 2.

The support 3 may be a support plate or a support table, for example.

Through setting up support piece 3, can support concave station 1 and actuating mechanism 2 and with riveting die 10 integrated as an organic whole structure, be favorable to reducing the assembly degree of difficulty of riveting die 10 and other equipment.

Alternatively, in the embodiment of the present application, the support 3 is provided with the sliding rail 4, at least one of the first component 11 and the second component 12 may be provided on the sliding rail 4, and the driving mechanism 2 is used to drive the first component 11 and/or the second component 12 to move on the sliding rail 4.

The slide rail 4, which may also be referred to as a slideway, a rail, may be fixed to the support 3. The slide rail 4 may be a roller type slide rail composed of two rails and a pulley, or may be a steel ball type slide rail, which is not limited in the present application.

In the application, only the first component 11 can be arranged on the sliding rail 4, and after riveting is finished, the driving mechanism 2 drives the first component 11 to pass through the sliding rail and be far away from the second component 12 so as to be separated from the second component 12; the second component 12 may be only arranged on the sliding rail 4, and after the riveting is completed, the driving mechanism 2 drives the second component 12 to pass through the sliding rail 4 and separate from the first component 11; the first member 11 and the second member 12 may be both provided on the slide rail 4, and after the caulking is completed, the driving mechanism 2 may simultaneously drive the first member 11 and the second member 12 so as to separate the first member 11 and the second member 12 from each other.

According to the embodiment of the application, the driving mechanism 2 is matched with the sliding rail 4, so that the first part 11 and the second part 12 are driven to be separated from each other after the riveting piece 30 is riveted, and the riveting piece 30 is smoothly released from the riveting die 10. In addition, the first part 11 and the second part 12 can be smoothly separated in a sliding manner through the sliding rail 4, so that the stability of the structure of the riveting die 10 is improved.

Optionally, in some embodiments, the support 3 includes a fixing member 5, where the fixing member 5 is convexly disposed on a side of the support 3 near the concave table 1, and the fixing member 5 is disposed at a distance from the first component 11 and/or the second component 12, and one end of the driving mechanism 2 is connected to the fixing member 5, and the other end is connected to the first component 11 and/or the second component 12.

The fixing member 5 is provided on the upper surface of the support member 3 at a distance from the first member 11 and/or the second member 12 as a member for fixing one end of the driving mechanism 2. The fixing member 5 may be a plate-like structure, a columnar structure, or the like, for example.

It should be understood that if the supporting element 3 is not provided with the fixing element 5, an included angle exists between the connection part of the driving mechanism 2 and the first component 11 or the second component 12, and when the included angle is smaller, a larger driving force is required to separate the first component 11 from the second component 12, so when the supporting element 3 includes the fixing element 5 protruding toward the concave table 1 and one end of the driving mechanism 2 is connected to the fixing element 5, the included angle between the driving mechanism 2 and the concave table 1 can be effectively increased, so that the required driving force is reduced to separate the first component 11 and the second component 12 from each other.

Alternatively, in the embodiment of the present application, the driving mechanism 2 is an elastic member, the elastic member includes a first elastic member 21, one end of the first elastic member 21 is connected to the first component 11, and the other end is connected to the fixing member 5; and/or a second elastic member 22, one end of the second elastic member 22 is connected to the second component 12, and the other end is connected to the fixing member 5.

It will be appreciated that when the riveting die 10 comprises two separable parts, namely a first part 11 and a second part 12, the resilient members comprise two resilient members, a first resilient member and a second resilient member, and when the riveting die 10 comprises a plurality of separable parts, the resilient members also comprise a plurality of matching resilient members.

The first elastic member 21 and the second elastic member 22 may be elastic members such as springs or elastic bands, for example.

It should be appreciated that when the rivet 30 is to be separated from the rivet die 10 after the rivet is completed, the first elastic member 21 is compressed to separate the first part 11 from the second part 12, and/or the second elastic member 22 is compressed to separate the second part 12 from the first part 11, so as to ensure that the rivet 30 is smoothly and rapidly separated from the rivet die 10 after the rivet is completed; when the riveting member 30 is released, the first elastic member 21 automatically rebounds to drive the first part 11 to approach the second part 12, and/or the second elastic member 22 automatically rebounds to drive the second part 12 to approach the first part 11 to form the riveting die 10 in a closed state, and the next riveting work is waited.

According to the embodiment of the application, the structure of the separated riveting die 10 is matched with the sliding rail 4 and the elastic piece, so that the concave table 1 is opened when the riveting piece 30 is taken out, smooth and rapid demoulding of the riveting piece 30 is facilitated, in addition, the elastic piece has the characteristics of stress compression and no stress rebound, and automatic riveting can be realized only through the elastic piece without other driving equipment.

Alternatively, in one embodiment, the first elastic member 21 and/or the second elastic member 22 are in a compressed state when the first member 11 and the second member 12 are separated.

Optionally, in some embodiments, the first elastic member 21 and/or the second elastic member 22 are in a compressed state when the first part 11 and the second part 12 are separated.

It will be appreciated that only the first elastic member 21 may be compressed to separate the first and second members 11, 12 from each other, only the first elastic member 22 may be compressed to separate the first and second members 11, 12 from each other, or the first and second elastic members 21, 22 may be compressed simultaneously to separate the first and second members 11, 12 from each other.

By the above embodiment, when the first elastic member 21 and/or the second elastic member 22 are in a compressed state when the first member 11 and the second member 12 are separated, it is possible to automatically rebound without the assistance of other devices after the completion of the release of the rivet 30, thereby realizing automated rivet connection.

An alternative embodiment is shown in fig. 3, where the first elastic member 21 and the second elastic member 22 are parallel to the slide rail 4.

When the first elastic member 21 and/or the second elastic member 22 are parallel to the sliding rail 4, the angle between the connection point of the first elastic member 21 and/or the second elastic member 22 and the concave table 1 is 90 degrees, which is most favorable for realizing smooth sliding of the first component 11 and the second component 12 to realize separation and superposition.

Optionally, in some embodiments, the riveting die 10 further comprises a first rotation shaft 61 and/or a second rotation shaft 62, wherein the first rotation shaft 61 is used for rotating the connection support 3 and the first part 11, and the second rotation shaft 62 is used for rotating the connection support 3 and the second part 12.

It will be appreciated that when the riveting die 10 comprises two separable parts, namely a first part 11 and a second part 12, the riveting die comprises two axes of rotation, a first axis of rotation and a second axis of rotation, and when the riveting die 10 comprises a plurality of separable parts, the riveting die also comprises a plurality of matching axes of rotation.

The first and second shafts 61 and 62 serve as hinges for the first or second members 11 and 12 and the support 3, and their design determines the opening and closing angles of the first and second members 11 and 12. The first shaft 61 and the second shaft 62 may be, for example, a male shaft and a female shaft, a spring washer, or other structures. The first shaft 61 and the second shaft 62 may have a hollow shaft structure or a solid shaft structure, and the present application is not limited thereto.

After the riveting member 30 is riveted, the driving mechanism 2 drives the first component 11 and/or the second component 12 to be separated from each other through the first rotating shaft 61 and/or the second rotating shaft 62, so that the riveting member 30 can be separated from the concave table 1. After the riveting piece 30 is completely demoulded, the driving mechanism 2 drives the first component 11 and/or the second component 12 to mutually approach through the first rotating shaft 61 and/or the second rotating shaft 62 to form a complete concave table 1, and the next round of riveting work is waited for, so that automatic riveting is realized.

Alternatively, in some embodiments, the drive mechanism 2 is disposed between the first part 11 and the support 3 to cooperate with the first shaft 61 to separate the first part 11 from the second part 12; and/or the driving mechanism 2 is provided between the second member 21 and the support 3 to cooperate with the second rotation shaft 62 to separate the first member 11 from the second member 12.

It will be appreciated that the drive mechanism 2 may be used as a power source to drive the first shaft 61 to rotate so as to cause the bottom of the first member 11 to rotate about the first shaft 61 in a direction away from the second member 12; the driving member 2 may also be used as a power source to drive the second rotating shaft 62 to rotate, so that the bottom of the second part 12 rotates around the second rotating shaft 62 in a direction away from the first part 11. When the driving mechanism is matched with the rotating shaft to enable the first component 11 and/or the second component 12 to rotate, the concave table 1 is opened, so that the riveting piece 30 can be conveniently and smoothly demoulded after riveting.

Optionally, in some embodiments, the driving mechanism 2 further includes a third elastic member 23, one end of the third elastic member 23 is connected to an end of the first component 11 near the opening, and the other end is connected to the supporting member 3; and/or a fourth elastic member 24, one end of the fourth elastic member 24 is connected to one end of the second member 12 near the opening, and the other end is connected to the supporting member 3.

It will be appreciated that when the riveting die 10 comprises two separable parts, namely a first part 11 and a second part 12, the drive mechanism 2 comprises two resilient parts, a third resilient part and a fourth resilient part, and when the riveting die 10 comprises a plurality of separable parts, the drive mechanism 2 also comprises a plurality of matching resilient parts.

When the riveting member 30 is to be separated from the riveting die 10 after riveting is completed, the third elastic member 23 drives the upper portion of the first component 11 to be matched with the upper portion of the first rotating shaft 61 and the upper portion of the second component 12 to be separated, and/or the fourth elastic member 24 is compressed to drive the upper portion of the second component 12 to be matched with the upper portion of the second rotating shaft 62 and the upper portion of the first component 11 to be separated, so that the riveting member 30 which is completed to be riveted is ensured to be smoothly and rapidly separated from the riveting die 10 in an opened state; after the riveting member 30 is released, the first elastic member 23 automatically rebounds to drive the upper portion of the first component 11 to approach the upper portion of the second component 12, and/or the second elastic member 24 automatically rebounds to drive the upper portion of the second component 12 to approach the upper portion of the first component 11 so as to form the riveting die 10 in a closed state, so that the normal operation of the next riveting work is ensured, and the continuous automatic riveting of the riveting die 10 is ensured.

The third elastic member 23 and the fourth elastic member 24 may be elastic members such as springs or elastic bands, for example.

It should be understood that in the above embodiment, when the same force is applied to the third elastic member 23 and the fourth elastic member 24, when one end thereof is connected to the end near the opening of the cavity 13, the deformation amount is larger, and the opening is opened to a greater extent, which is more advantageous for demolding the rivet 30.

Optionally, in some embodiments, the third elastic member 23 and/or the fourth elastic member 24 are in a compressed state when the first member 11 and the second member 12 are separated.

It will be appreciated that when the first and second members 11, 12 are separated, the third and/or fourth resilient members 23, 24 are in a compressed state and may spring back automatically after the riveting is completed, enabling automated riveting.

Alternatively, in some embodiments, not shown in the drawings, the riveting die 10 may include the first rotation shaft 61, the second rotation shaft 62, and the slide rail 4 in addition to the recess table 1, the driving mechanism 2, and the support 3. That is, after the riveting member 30 is riveted, the driving mechanism 2 drives the first member 11 and/or the second member 12 to separate through the sliding rail 4, and simultaneously the first rotating shaft 61 and/or the second rotating shaft 62 can be used for opening, so that the degree and the speed of separating the first member 11 from the second member 12 can be further improved, and the faster demoulding of the riveting member 30 can be facilitated.

Alternatively, in one embodiment of the application, the cavity 13 has a trapezoidal cross section in the depth direction, with the base angle of the trapezoid away from the opening being acute.

The base angle of the trapezoid away from the opening is understood to be the angle between the side and bottom surfaces of the cavity 13. The base angle of the trapezoid away from the opening is acute, i.e. angles a and B are acute. The angle a may be equal to or different from the angle B. When the angles a and B are acute angles, the cross section of the cavity 13 in the depth direction is a trapezoid having the length of the upper base a smaller than the length of the lower base B.

It should be understood that fig. 2 only shows a certain section of the riveting die 10, and only shows angles of two bottom corners below the section, and in a solid structure, the included angles between the side surface and the bottom surface of the cavity 13 may be multiple, and the included angles may be the same or different, which is not limited by the present application.

For example, when the cross section of the cavity 13 in the depth direction is trapezoidal, the cavity 13 may be a quadrangular frustum, or may be a truncated frustum, that is, the basal surface of the cavity 13 may be a quadrilateral, or may be a circular shape or other geometric shapes.

By arranging the cavity 13 with the trapezoidal cross section in the depth direction, more material of the riveting piece 30 can be extruded into the bottom corner during riveting, so that the interlocking value of the upper layer plate 31 and the lower layer plate 32 in the riveting piece 30 is increased, and the riveting quality is improved.

It should be noted that, in the embodiment of the present application, the structure of the cavity 13 may be designed to be similar to a trapezoid according to actual requirements, for example, in order to make the riveted buckle formed after riveting smoother, not easy to scratch people and other parts, the upper base angle and/or the lower base angle of the trapezoid may be set as a rounded angle.

Alternatively, in some embodiments of the present application, as shown in fig. 2, the trapezoid is an isosceles trapezoid.

Referring to fig. 2, the trapezoid is an isosceles trapezoid, that is, the angle a is equal to the angle B, but it should be understood that in the actual cavity 13 structure, the trapezoid is an isosceles trapezoid, that is, the included angle of the side surface and the bottom surface of the cavity 13 is equal everywhere.

When the cross section of the cavity 13 in the depth direction is isosceles trapezoid, the material amount of the riveting piece 30 extruded into the bottom corner is equal, and the interlocking values of all positions of the riveting piece are the same, so that all positions of the riveting buckle formed after the riveting is finished are uniform in quality, and the riveting quality is further improved.

Alternatively, in embodiments of the present application, the base angle is 45-85 degrees. I.e. angle a and/or angle B is 45-85 degrees.

According to the embodiment of the application, the base angle is set to be 45-85 degrees, so that the riveting industrial process is facilitated, and the riveting quality of the riveting piece 30 is improved. When the base angle is smaller than 45 degrees, insufficient filling of the base angle may occur after the material is extruded into the base angle due to the different ductility of different riveting pieces 30, which is not beneficial to the industrial process of riveting. When the base angle is greater than 85 degrees, the interlock value of the riveting piece 30 is smaller, and the riveting quality is not ideal.

Fig. 5 is a schematic structural view of a riveting apparatus 20 according to an embodiment of the present application. As shown in fig. 5, the caulking apparatus 20 includes a caulking head 7 in addition to the caulking die 10 in any of the above embodiments. The rivet head 7 is provided on the side of the rivet die 10 where the recess 1 is provided, and is used for riveting the rivet 30 in the recess 1.

The rivet head 7 may also be called a rivet punch or a ram, and when the rivet is performed, the rivet head 7 descends to pre-tighten the rivet 30 and the upper end surface of the rivet die 10, and the position of the rivet 30 is fixed to prevent the rivet 30 from moving during the riveting process. Then the riveting head 7 continues to press down to extrude the upper plate 31 and the lower plate 32 of the riveting piece 30 into the cavity 13 of the riveting die 10, along with the increase of the pressure of the riveting head 7, the material deforms in the cavity 13, the upper plate 21 and the lower plate 22 form an inlaid structure, namely a riveting buckle, and the pressure of the riveting head 7 is relaxed and returns.

In the riveting process, the riveting piece 30 is pressed into the riveting die 10 by the pressure of the riveting head 7, and the rust-proof coating or paint layer of the riveting piece 30 can deform and flow along with the riveting piece 30, so that the surface of the riveting piece 30 is not damaged, and the corrosion resistance and strength of the connecting point of the riveting piece 30 are not affected.

Alternatively, in some embodiments, the rivet head 7 is circular in shape.

In the application, when the rivet joint 7 is cylindrical, the rivet thickness of the rivet button formed after riveting is the same throughout, which is beneficial to improving the connection strength of the rivet button.

Of course, the rivet head 7 may have other shapes, such as a rectangular parallelepiped shape or a truncated cone shape, and the present application is not limited thereto.

It should be understood that fig. 5 only shows the structure of the riveting die 10 for separating the first component 11 and the second component 12 by the driving mechanism 2, the supporting plate 3 and the sliding rail 4, but not shown, the rivet joint 7 provided by the embodiment of the application may also be matched with the structure of the riveting die 10 in other separation modes to form a riveting device for use, for example, for riveting in cooperation with the above-mentioned rotating shaft scheme. Specifically, another riveting apparatus 20 (not shown in the drawings) includes a socket 1, a driving mechanism 2, a support 3, first and second rotating shafts 61 and 62, and a rivet head 7. That is, the rivet joint 7 according to any of the embodiments described above is added to the structure of fig. 3. For another example, still another riveting apparatus 20 (not shown in the drawings) includes a recess 1, a driving mechanism 2, a support 3, first and second rotating shafts 61 and 62, a slide rail 4, and a rivet head 7.

Alternatively, in the embodiment of the present application, the rivet head 7 includes a protrusion 8, the protrusion 8 is disposed at the bottom end of the rivet head, and the protrusion 8 is used to press the rivet 30 into the recess 1.

It should be understood that the rivet member 30 is pressed into the recess 1 of the rivet mold 10 by the rivet head 7 during the riveting process, and the width of the rivet head 7 is limited by the opening width of the cavity 13, so that the protruding portion 8 is provided at the bottom end of the rivet head, and the rivet member 30 is pressed into the recess 1 by the protruding portion 8. By arranging the protruding parts 8 at the bottom of the rivet joint 7, the protruding parts 8 can be flexibly arranged according to the width of the opening of the cavity 13.

Alternatively, in the embodiment of the present application, the cross section of the protruding portion 8 in the depth direction is trapezoidal, and the bottom angle away from the rivet head 7 is an obtuse angle.

In the embodiment of the application, the bottom angle of the protruding part 8 is set to be an obtuse angle, that is, the angle D and the angle E are obtuse angles, and compared with the case that the bottom angle is set to be a right angle or an acute angle, the upper material 31 of the riveting member 30 has more surplus material after riveting, that is, the surplus thickness of the material is larger, which is beneficial to improving the riveting quality.

Alternatively, in the embodiment of the present application, the cross section of the protruding portion 8 in the depth direction is isosceles trapezoid.

The protrusion 8 may be a quadrangular prism or a truncated cone, which is not limited in the present application.

By setting the cross section of the depth direction of the protruding part 8 to be isosceles trapezoid, after the riveting piece 30 is riveted, the riveting thickness is the same everywhere, namely the quality of the formed riveting buckle everywhere is uniform, which is more beneficial to improving the connection strength of the riveting buckle.

Alternatively, in an embodiment of the application, the maximum radial dimension d of the projection 8 is smaller than the width a of the opening. It will be appreciated that in order to press the rivet 30 into the recess 1 with the projection 8 of the rivet head 7, the maximum radial dimension d of the projection 8 is smaller than the width a of the opening.

In order to facilitate understanding of the staking process of the staking device 20 of the present application, the staking process of the staking member 30 is briefly described below.

Step one: the rivet 30 flows to a riveting station;

Step two: searching for the region to be riveted by charge-coupled detector (CCD) addressing

Step three: the riveting head 7 presses down the riveting piece 30 to the inside of the cavity 13 of the riveting die 10 through the protruding part 8, the upper layer plate 31 and the lower layer plate 32 of the riveting piece 30 form interlocking, and the riveting is completed;

step four: the rivet joint 7 and the rivet piece 30 which is riveted are pulled out upwards relative to the rivet die 10, the first component 11 and the second component 12 are separated in any mode, and the rivet piece 30 is separated from the rivet die 10;

After the rivet 30 is separated from the rivet die 10, the first part 11 and the second part 12 are closed under the action of the driving mechanism 2, and the next round of riveting process is prepared.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (20)

1. A riveting die, comprising:

   The concave table comprises at least a first component and a second component, the first component and the second component are enclosed to form the concave table, the concave table is provided with a cavity, one end of the cavity is provided with an opening, and the concave table is used for riveting a riveting piece;

   wherein the first and second members are separable to disengage the rivet from the recess.
2. The rivet die of any one of claim 1, wherein the rivet die further comprises:

   And a driving mechanism for driving the first member and/or the second member so as to separate or approach the first member and the second member from or to each other.
3. The rivet die of claim 2, wherein the rivet die further comprises:

   The support piece is arranged below the concave table and used for supporting the concave table and the driving mechanism.
4. A riveting die according to claim 3, wherein the support is provided with a slide rail on which at least one of the first and second parts is movably arranged, the drive mechanism being for driving the first and/or second parts to move on the slide rail.
5. The riveting die according to claim 4, wherein the support member includes a fixing member, the fixing member is provided in a protruding manner on a side of the support member adjacent to the recess, the fixing member is provided at a distance from the first member and/or the second member, and the driving mechanism has one end connected to the fixing member and the other end connected to the first member and/or the second member.
6. The rivet die of claim 5, wherein said drive mechanism is a spring, said spring comprising:

   One end of the first elastic piece is connected with the first component, and the other end of the first elastic piece is connected with the fixing piece; and/or

   And one end of the second elastic piece is connected with the second component, and the other end of the second elastic piece is connected with the fixing piece.
7. The rivet die of claim 6, wherein the first and/or second resilient members are in a compressed state when the first and second members are separated.
8. Riveting die according to claim 6 or 7, wherein the first and/or second resilient member is arranged parallel to the slide rail.
9. A riveting die according to claim 3, wherein the riveting die further comprises:

   A first shaft for rotatably connecting the support and the first member; and/or

   And the second rotating shaft is used for rotatably connecting the support piece and the second component.
10. The rivet die of claim 9 wherein the drive mechanism is disposed between the first member and the support to cooperate with the first shaft to separate the first member from the second member; and/or

    The driving mechanism is arranged between the second component and the supporting piece to be matched with the second rotating shaft so as to separate the first component from the second component.
11. The riveting die of claim 9 or 10, wherein the drive mechanism further comprises:

    One end of the third elastic piece is connected with one end of the first component close to the opening, and the other end of the third elastic piece is connected with the supporting piece; and/or

    And one end of the fourth elastic piece is connected with one end of the second part close to the opening, and the other end of the fourth elastic piece is connected with the supporting piece.
12. The riveting die of claim 11, wherein the third and/or fourth resilient members are in a compressed state when the first and second members are separated.
13. The rivet die according to any one of claims 1 to 12, wherein a cross section of the cavity in a depth direction is a trapezoid, a base angle of the trapezoid away from the opening being an acute angle.
14. The rivet die of claim 13, wherein the trapezoid is an isosceles trapezoid.
15. A riveting die according to claim 13 or 14, wherein the base angle is 45-85 degrees.
16. A riveting apparatus, wherein the riveting apparatus comprises the riveting die of any one of claims 1-15;

    the riveting head is arranged on one side of the riveting die, provided with the concave table, and used for riveting the riveting piece in the concave table.
17. The staking device of claim 16 wherein the rivet includes a projection disposed at the bottom end of the rivet for pressing the rivet into the recess.
18. The caulking apparatus of claim 17, wherein a cross-section of the protrusion in a depth direction is trapezoidal and a bottom angle away from the caulking head is obtuse.
19. The caulking apparatus of claim 18, wherein a cross-section of the projection in a depth direction is isosceles trapezoid.
20. The staking device of any one of claims 17-19 wherein the maximum radial dimension of the projection is less than the width of the opening.