Adjustable riveting mechanism

Abstract

The adjustable riveting mechanism comprises a male die and a female die which are oppositely arranged on a rack, the male die comprises a riveting rod arranged on the rack in a sliding mode through a sleeve and a driving device for driving the riveting rod to stretch out and draw back, a mounting hole corresponding to the sleeve is formed in the rack, the sleeve penetrates through the mounting hole in a sliding mode, and the female die is arranged on the rack. One end, close to the riveting rod, of the sleeve is connected with a locking ring, the other end of the sleeve is provided with a limiting boss, the sleeve is axially fixed to the rack through the locking ring and the limiting boss, and an adjusting device for adjusting the axis of the sleeve is arranged between the limiting boss and the rack. The adjustable riveting mechanism is simple in structure, the coaxiality of the male die and the female die is adjusted through the adjusting device, and the riveting precision is improved.

Description

Technical Field

[0001] The invention relates to the field of automated machinery, and in particular to an adjustable riveting mechanism. Background Art

[0002] Riveting is a cold connection technology used to connect two or more metal plates. With the development of industrialization, existing riveting operations have begun to use servo self-piercing riveting to achieve automated operations, so existing riveting is mostly operated by riveting mechanisms. The rivet is pressed into the workpiece by the riveting mechanism. After the C-type clamp of the riveting mechanism is processed, it is easy for the punch and the die to be not in a straight line, that is, the punch and the die cannot be coaxial, so a riveting mechanism that can adjust the concentricity between the punch and the die is needed to ensure the riveting quality of the product. Summary of the invention

[0003] The object of the present invention is to provide an adjustable riveting mechanism to overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The embodiment of the present invention discloses an adjustable riveting mechanism, comprising a punch and a die relatively arranged on a frame, the punch comprising a rivet rod slidably arranged on the frame through a sleeve and a driving device for driving the rivet rod to extend and retract, a mounting hole corresponding to the sleeve is arranged in the frame, the sleeve slides through the mounting hole, and a locking ring is connected to one end of the sleeve close to the rivet rod, and a limiting boss is arranged at the other end, the locking ring and the limiting boss axially fix the sleeve to the frame, and an adjusting device for adjusting the axis of the sleeve is arranged between the limiting boss and the frame.

[0006] Furthermore, in the above-mentioned adjustable riveting mechanism, the adjusting device includes a first eccentric ring sleeved on the sleeve and a second eccentric ring sleeved on the first eccentric ring.

[0007] Furthermore, in the above-mentioned adjustable riveting mechanism, an annular first boss is protruded from one end of the first eccentric ring close to the frame, the outer wall of the first boss is eccentrically arranged between the inner wall of the first eccentric ring, and the inner wall thereof is slidably sleeved on the sleeve, a rotating groove corresponding to the first boss is provided on the inner wall of one end of the mounting hole close to the adjusting device, an annular second boss is protruded from one end of the second eccentric ring close to the frame, the outer wall of the second boss is eccentrically arranged between the inner wall of the second eccentric ring, and the inner wall thereof is slidably sleeved on the first boss.

[0008] Furthermore, in the above-mentioned adjustable riveting mechanism, the outer walls of the first eccentric ring and the second eccentric ring are respectively provided with a plurality of adjustment teeth.

[0009] Furthermore, in the above-mentioned adjustable riveting mechanism, a stop pin corresponding to the adjusting tooth is inserted into and pulled out of the end surface of the frame close to the adjusting device.

[0010] Furthermore, in the above-mentioned adjustable riveting mechanism, the locking ring is arranged at the corresponding end of the sleeve by means of a threaded connection, and the outer wall of the locking ring is provided with a plurality of force application grooves.

[0011] Furthermore, in the above-mentioned adjustable riveting mechanism, the outer wall of the locking ring is provided with an anti-loosening groove, the anti-loosening groove passes through the side wall of the locking ring, and the end face of the locking ring is provided with an anti-loosening bolt passing through the anti-loosening groove.

[0012] Compared with the prior art, the advantages of the present invention are: the adjustable riveting mechanism described in the present invention has a simple structure, and the coaxiality of the punch and the die is adjusted by the adjusting device to improve the riveting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 Shown is a schematic structural diagram of an adjustable riveting mechanism in a specific embodiment of the present invention.

[0015] Figure 2 Shown is a schematic diagram of the installation of an adjusting device in a specific embodiment of the present invention.

[0016] Figure 3 Shown is an exploded schematic diagram of a sleeve and an adjusting device according to a specific embodiment of the present invention.

[0017] Figure 4 Shown is a schematic structural diagram of a mounting hole in a specific embodiment of the present invention.

[0018] Figure 5 Shown is a schematic structural diagram of a sleeve in a specific embodiment of the present invention.

[0019] Figure 6 Shown is a schematic structural diagram of a first eccentric ring in a specific embodiment of the present invention.

[0020] Figure 7 Shown is a schematic structural diagram of a second eccentric ring in a specific embodiment of the present invention.

[0021] Figure 8Shown is a schematic structural diagram of a locking ring in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Ginseng Figures 1 to 8 As shown, an adjustable riveting mechanism includes a punch and a die (not shown) relatively arranged on a frame 1, the punch includes a rivet rod slidably arranged on the frame 1 through a sleeve 2 and a driving device (not shown) for driving the rivet rod to extend and retract, a mounting hole 11 corresponding to the sleeve 2 is arranged in the frame 1, the sleeve 2 slides through the mounting hole 11, and a locking ring 3 is connected to one end close to the rivet rod, and a limiting boss 21 is arranged at the other end, the locking ring 3 and the limiting boss 21 axially fix the sleeve 2 to the frame 1, and an adjusting device for adjusting the axis of the sleeve 2 is arranged between the limiting boss 21 and the frame 1.

[0026] In this technical solution, the frame is a conventional C-frame or other structure, the die is fixed to the corresponding position of the frame by bolts, etc., the piston of a driving device such as an electric cylinder or a hydraulic cylinder is slidably arranged in the sleeve, and is connected to the rivet rod by a conventional connection method, thereby driving the rivet rod to extend and retract along the sleeve to complete the riveting, the sleeve is axially fixed to the frame by the limiting boss and the locking ring on its outer wall, and the axial position of the sleeve (i.e., the punch) is adjusted by the adjusting device, thereby ensuring the coaxiality of the punch and the die and improving the riveting accuracy.

[0027] For example, see Figures 1 to 3 As shown, the adjusting device includes a first eccentric ring 4 sleeved on the sleeve 2 and a second eccentric ring 5 sleeved on the first eccentric ring 4 .

[0028] In this technical solution, the axial center position of the sleeve is adjusted by rotating the first eccentric ring and the second eccentric ring, thereby improving the coaxiality of the punch and the die and improving the riveting accuracy.

[0029] For example, see Figures 2 to 7 As shown, an annular first boss 41 is protruded from one end of the first eccentric ring 4 close to the frame 1, an outer wall of the first boss 41 is eccentrically arranged between the inner wall of the first eccentric ring 4, and its inner wall is slidably sleeved on the sleeve 2, an inner wall of the mounting hole 11 close to the adjusting device is provided with a rotating groove corresponding to the first boss 41, and an annular second boss 51 is protruded from one end of the second eccentric ring 5 close to the frame 1, an outer wall of the second boss 51 is eccentrically arranged between the inner wall of the second eccentric ring 5, and its inner wall is slidably sleeved on the first boss 41.

[0030] In this technical solution, an adjustment section corresponding to the first boss is provided on the outer wall of the sleeve, and the diameter of the adjustment section is smaller than the diameter of the mounting hole. The first eccentric ring and the second eccentric ring are both eccentric annular structures, that is, the outer wall of the first boss and the outer wall of the first eccentric ring are concentrically arranged and eccentrically arranged with the inner wall of the first eccentric ring, while the inner wall of the second boss and the outer wall of the second eccentric ring are concentrically arranged and eccentrically arranged with the outer wall of the second eccentric ring. The first eccentric ring is rotatably sleeved on the adjustment section, and the second eccentric ring is rotatably sleeved on the outer wall of the second boss. The outer wall of the second eccentric is rotatably arranged in a rotating groove at the end of the mounting hole. The axial position of the sleeve can be adjusted by rotating the first eccentric ring and / or the second eccentric ring, thereby ensuring the coaxiality of the punch and the die and improving the riveting accuracy.

[0031] For example, see Figure 6 and Figure 7 As shown, the outer walls of the first eccentric ring 4 and the second eccentric ring 5 are respectively provided with a plurality of adjustment teeth.

[0032] In this technical solution, the first eccentric ring and the second eccentric ring can be rotated manually by using the adjusting teeth, which is convenient for operation.

[0033] For example, see Figure 4As shown, a stop pin (not shown) corresponding to the adjusting tooth is inserted and pulled out from the end surface of the frame 1 close to the adjusting device.

[0034] In this technical solution, a pin hole 12 corresponding to the stop pin is provided in the end face of the frame close to the adjusting device. After the adjustment of the first eccentric ring and the second eccentric ring is completed, a conventional stop pin or other locking device is inserted and snapped into the corresponding adjusting teeth to prevent the first eccentric ring and the second eccentric ring from shifting due to shaking. When adjustment is required, the stop pin can be pulled out.

[0035] For example, see Figure 1 and Figure 8 As shown, the locking ring 3 is arranged at the corresponding end of the sleeve 2 by means of threaded connection, and the outer wall of the locking ring 3 is provided with a plurality of force application grooves 31 .

[0036] In this technical solution, the locking ring is arranged at the corresponding end of the sleeve by means of threaded connection, and the sleeve is axially fixed to the frame in cooperation with the limiting boss, and the force application groove is used in cooperation with a conventional hook-type wrench, etc., for easy disassembly and assembly. For example, see Figure 1 and Figure 8 As shown, the outer wall of the locking ring 3 is provided with an anti-loosening groove 32, which passes through the side wall of the locking ring 3, and the end face of the locking ring 3 is provided with an anti-loosening bolt (not marked) passing through the anti-loosening groove 32.

[0037] In this technical solution, the locking ring is machined with countersunk holes and threaded holes in the end faces on both sides of the anti-loosening groove. After the locking ring fixes the sleeve axially, the anti-loosening bolt is inserted from the countersunk hole and connected to the threaded hole, applying axial force to the thread between the locking ring and the sleeve to prevent loosening.

[0038] In summary, the adjustable riveting mechanism described in the present invention has a simple structure. The adjustable riveting mechanism described in the present invention has a simple structure. The coaxiality of the punch and the die is adjusted by the adjusting device to improve the riveting accuracy.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] The above description is only a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable riveting mechanism, characterized in that: It comprises a punch and a die which are relatively arranged on a frame, the punch comprises a rivet rod which is slidably arranged on the frame through a sleeve and a driving device which drives the rivet rod to extend and retract, a mounting hole corresponding to the sleeve is arranged in the frame, the sleeve slides through the mounting hole, and a locking ring is connected to one end of the sleeve close to the rivet rod, and a limiting boss is arranged at the other end, the locking ring and the limiting boss axially fix the sleeve to the frame, and an adjusting device for adjusting the axis of the sleeve is arranged between the limiting boss and the frame.

2. The adjustable riveting mechanism according to claim 1, characterized in that: The adjusting device comprises a first eccentric ring sleeved on the sleeve and a second eccentric ring sleeved on the first eccentric ring.

3. The adjustable riveting mechanism according to claim 2, characterized in that: An annular first boss is protruded from one end of the first eccentric ring close to the frame, the outer wall of the first boss is eccentrically arranged between the inner wall of the first eccentric ring, and the inner wall thereof is slidably sleeved on the sleeve, a rotating groove corresponding to the first boss is provided on the inner wall of one end of the mounting hole close to the adjusting device, an annular second boss is protruded from one end of the second eccentric ring close to the frame, the outer wall of the second boss is eccentrically arranged between the inner wall of the second eccentric ring, and the inner wall thereof is slidably sleeved on the first boss.

4. The adjustable riveting mechanism according to claim 2, characterized in that: The outer walls of the first eccentric ring and the second eccentric ring are respectively provided with a plurality of adjustment teeth.

5. The adjustable riveting mechanism according to claim 4, characterized in that: A stop pin corresponding to the adjusting tooth is inserted and pulled out from the end surface of the frame close to the adjusting device.

6. The adjustable riveting mechanism according to claim 1, characterized in that: The locking ring is arranged on the corresponding end of the sleeve by threaded connection, and the outer wall of the locking ring is provided with a plurality of force application grooves.

7. The adjustable riveting mechanism according to claim 6, characterized in that: The outer wall of the locking ring is provided with an anti-loosening groove, the anti-loosening groove passes through the side wall of the locking ring, and the end surface of the locking ring is provided with an anti-loosening bolt passing through the anti-loosening groove.

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