CN115415471A

CN115415471A - Double-sided riveting pressure head, double-sided riveting mechanism and riveting machine

Info

Publication number: CN115415471A
Application number: CN202211114684.9A
Authority: CN
Inventors: 汪剑峰; 李晓鸿
Original assignee: Huizhou Ruipelin Intelligent Technology Co ltd
Current assignee: Ruimai Technology Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-12-02

Abstract

The invention discloses a double-sided riveting pressure head, a double-sided riveting mechanism and a riveting machine, which are used for simultaneously riveting rivets in different placement directions. The invention has simple structure, and the front riveting head component and the back pressing head are connected by the connecting block, so that the front riveting head component and the back pressing head can be synchronously pressed down, the simultaneous riveting of different rivets on multiple points is realized, the riveting efficiency is greatly improved, the punching force and the punching times are saved, the abrasion of the double-sided riveting pressing head is reduced, and the service life is prolonged.

Description

Double-sided riveting pressure head, double-sided riveting mechanism and riveting machine

Technical Field

The invention relates to the technical field of riveting, in particular to a double-sided riveting pressure head, a double-sided riveting mechanism and a riveting machine.

Background

Riveting technology refers to technology for achieving the purpose of fixing or moving mutually by connecting two or more parts together; the riveting technology is applied to various industries, such as multifunctional sofas in the household industry, wherein iron frame components forming a basic supporting structure are self-punched and riveted by a riveting machine, but the riveting machine of the type can only rivet in a single point and punch and rivet with certain force, time and labor are wasted during riveting, a die punch pin is easy to damage, and industrial accidents are easy to cause; in addition, because the products to be riveted have different shapes, after one riveting point is riveted, the products may need to be turned over to rivet in other directions, and the turning process greatly delays the production time, so that the overall production efficiency is low.

Therefore, a double-sided riveting pressure head, a double-sided riveting mechanism and a riveting machine are needed, simultaneous riveting of different rivets on multiple points can be achieved, and riveting efficiency is improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the double-sided riveting pressure head, the double-sided riveting mechanism and the riveting machine, which are simple in structure, can realize simultaneous riveting of different rivets on multiple points, and improve the riveting efficiency.

The invention provides a double-sided riveting pressure head which is used for simultaneously riveting rivets in different placement directions and comprises a front side riveting head component, a back side pressure head and a connecting block, wherein the front side riveting head component is connected with the back side pressure head through the connecting block, and the front side riveting head component and the back side pressure head can move together; the front rivet head assembly (1) comprises a telescopic punching needle (11), one end of the telescopic punching needle (11) is fixedly connected with the inside of the connecting block (3), and the other end of the telescopic punching needle (11) is used for being matched and riveted with the top of the rivet (8); the reverse side pressure head (2) is used for riveting with the bottom of the rivet (8) in a matching manner.

Furthermore, the front-side riveting head assembly or the back-side pressing head is provided with an elastic pressing structure for pressing the workpiece to be riveted at the rivet; the elastic pressing structure comprises an elastic piece and a pressing block, the elastic piece is arranged on the periphery of the telescopic punch pin or the reverse side pressing head, and two ends of the elastic piece are respectively used for tightly abutting against the inside of the connecting block and the pressing block; the pressing block is arranged on the periphery of the telescopic punch pin or the periphery of the reverse pressure head, one end of the pressing block is used for being tightly propped against the end face of the elastic piece, the other end of the pressing block protrudes out of the end face of the connecting block, and the pressing block can vertically move relative to the connecting block.

Furthermore, a limiting block is fixedly arranged in the connecting block and is positioned on the periphery of the pressing block, and the upper surface of the limiting block is abutted to the pressing block.

Furthermore, a punching needle fixing block is further arranged in the connecting block and used for being tightly propped against one end of the telescopic punching needle.

Furthermore, a gasket is arranged between the reverse side pressure head and the connecting block, and the gasket is positioned at the top of the reverse side pressure head and used for adjusting the height of the reverse side pressure head.

Further, the double-sided riveting pressure head further comprises a guide block, the guide block is arranged on the periphery of the connecting block, and the connecting block can vertically move in a telescopic mode relative to the guide block.

Preferably, the length of the guide block is not less than the length of the connecting block.

Further, the double-sided riveting pressure head further comprises a pressure cylinder, a driving end is arranged in the pressure cylinder, and the driving end is fixedly connected with the connecting block and used for driving the connecting block to move in a telescopic mode.

Furthermore, one end of the guide block is also provided with a fixed plate, one side of the fixed plate is fixedly connected with the guide block, and the other side of the fixed plate is fixedly connected with the pressure cylinder.

The invention also provides a double-sided riveting mechanism which comprises a support plate and the double-sided riveting pressure head, wherein the support plate is positioned below the double-sided riveting pressure head and is used for positioning rivets in different directions and workpieces to be riveted.

Furthermore, a support column and a reverse side rivet head assembly are arranged on the support plate, the support column is used for positioning the rivet with the top on the top and different workpieces to be riveted connected through the rivet, the reverse side rivet head assembly is used for positioning the rivet with the bottom on the top and different workpieces to be riveted connected through the rivet, and the top of the support column and the top of the reverse side rivet head assembly protrude out of the upper surface of the support plate.

Preferably, the central line of the telescopic punching needle and the central line of the supporting column are on the same straight line.

Furthermore, the reverse side rivet head assembly comprises a positioning part and a fixed punch pin, the positioning part is located at the top of the reverse side rivet head assembly, the fixed punch pin is located inside the reverse side rivet head assembly, the positioning part is used for positioning the rivet with the bottom of the rivet on the top of the positioning part, and the top of the fixed punch pin is matched with the reverse side pressure head to rivet the rivet with the bottom of the rivet on the top of the reverse side pressure head assembly.

Preferably, the central line of the reverse side pressure head and the central line of the fixed punch pin are on the same straight line.

The invention also provides a riveting machine which comprises at least one group of double-sided riveting mechanisms.

The implementation of the invention has the following beneficial effects:

1. connecting block one end sets up positive die subassembly and reverse side pressure head, and both can push down in step, rivet the rivet of placing at last rivet and bottom of riveting the top respectively and place the rivet at last, rivet when realizing different rivets on the multiple spot, promote riveting efficiency greatly, shorten product production cycle.

2. The compressing block compresses the workpiece to be riveted at the position of the rivet through the compression elasticity applied by the elastic piece, so that the fixed-point riveting of the telescopic punch pin is facilitated, the positioning is accurate, the rivet and the workpiece to be riveted are prevented from being abnormally shaken to influence the riveting effect during riveting, and the fixing is firm.

3. Set up the height of gasket adjustment reverse side pressure head for flexible towards needle and top just contact but do not exert the ram-force when placing the rivet last, the reverse side pressure head also just contacts the rivet of placing last in the bottom and does not exert the ram-force to the rivet, and the degree of cooperation is good, guarantees riveted reliability simultaneously.

4. The double-sided riveting pressure head and the support plate in the double-sided riveting mechanism are matched with each other, so that rivets in different placing directions are riveted at the same time, the positioning is accurate, the fixing is firm, at least 50% of punching times of a product can be saved, the overturning times of the product in the riveting process can be greatly reduced, the riveting efficiency and the overall production efficiency are greatly improved, energy sources required by punching are saved, and the production cost is saved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described, wherein the same components are denoted by the same reference numerals. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of the overall structure of a double-sided riveting mechanism in one possible embodiment of the invention;

FIG. 2 is a cross-sectional view of the double-sided riveting mechanism of FIG. 1;

fig. 3 is an enlarged view of a structure of one end of the connection block of fig. 2.

Wherein the reference numerals in the figures correspond to: 1-a front rivet head assembly, 11-a telescopic punch pin, 12-an elastic part, 13-a pressing block, 14-a limiting block, 15-a punch pin fixing block, 2-a back press head, 21-a gasket, 3-a connecting block, 4-a guide block, 5-a fixing plate, 6-a pressure cylinder, 61-a driving end, 7-a supporting plate, 71-a supporting column, 72-a back rivet head assembly, 720-a positioning part, 721-a fixed punch pin, 8-a rivet, 81-a front rivet and 82-a back rivet.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "back", "two ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention; also, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Examples

The embodiment of the specification provides a riveting machine which comprises a double-sided riveting mechanism, wherein a group of double-sided riveting mechanisms can be arranged in the riveting machine according to the requirement of actual production, and a plurality of groups of double-sided riveting mechanisms can be arranged for riveting at the same time, so that the overall riveting efficiency is improved; the double-sided riveting mechanism comprises a supporting plate 7 and a double-sided riveting pressure head, wherein the supporting plate 7 is positioned below the double-sided riveting pressure head and is used for positioning and placing a rivet 8 and a workpiece to be riveted, and the double-sided riveting pressure head is matched with the supporting plate 7 to press downwards during riveting so as to realize simultaneous riveting of the rivet 8 placed at the top and a rivet 9 placed at the bottom; in the present embodiment, for convenience of description, the rivet 8 placed on top is referred to as a front rivet 81, and the rivet 8 placed on bottom is referred to as a back rivet 82.

Specifically, as shown in the accompanying fig. 1-3 of the specification, the double-sided riveting indenter is used for simultaneously riveting a front rivet 81 and a back rivet 82, and comprises a front rivet assembly 1, a back indenter 2 and a connecting block 3, wherein the front rivet assembly 1 is used for contacting the top of a rivet 8 and riveting and fixing the front rivet 81 and a workpiece to be riveted, and the back indenter 2 is used for contacting the bottom of the rivet 8 and riveting and fixing the back rivet 82 and the workpiece to be riveted; as shown in the sectional view of fig. 2 in the specification, the front riveting head assembly 1 and the back pressing head 2 are both connected with the connecting block 3, and a first accommodating cavity and a second accommodating cavity are formed in the connecting block 3, when the front riveting head assembly 1 is installed and fixed in the first accommodating cavity, and when the back pressing head 2 is installed, detached and adjusted in the second accommodating cavity; and with the direction shown in the figure as the reference, the front riveting head assembly 1 and the back pressing head 2 both protrude out of the bottom surface of the connecting block 3, so that the front riveting head assembly 1 and the back pressing head 2 can move together along with the movement of the connecting block 3, further the front riveting head assembly 81 and the back riveting head 81 can be simultaneously riveted, the traditional single-point riveting is replaced by multi-point riveting, and the riveting efficiency is greatly improved.

Specifically, as shown in the attached drawing 3 of the specification, the front rivet head assembly comprises a telescopic punch pin 11, one end of the telescopic punch pin 11, which is close to the front rivet, is a riveting end, the riveting end protrudes out of the bottom surface of the connecting block 3 and is used for contacting and riveting with the front rivet 81, the other end of the telescopic punch pin 11 is a fixed end, and the fixed end is inserted into the first accommodating cavity, so that the telescopic punch pin 11 and the connecting block 3 are firmly connected and fixed, the telescopic punch pin is not easy to shake, and the safety during punching and riveting, the operation stability of a double-sided riveting pressure head and the connection reliability of a product riveting point are ensured; in the embodiment, in order to further ensure the fixing firmness of the telescopic punch pin 11, a punch pin fixing block 15 is further arranged in the first accommodating cavity and is arranged on one side of the fixed end of the telescopic punch pin 11, as shown in fig. 3, one side of the fixed end is tightly pressed against the punch pin fixing block 15, and the other side of the fixed end is tightly pressed against the connecting block 3, namely the inner wall of the first accommodating cavity, so that the telescopic punch pin 11 is ensured to be firmly fixed in the connecting block 3; in a possible embodiment of the present specification, a mounting hole for plugging in the punch pin fixing block 15 is formed in the blind end of the first accommodating cavity, during installation, the retractable punch pin 11 is placed in the first accommodating cavity, the punch pin fixing block 15 is plugged in the mounting hole until the punch pin fixing block 15 contacts with the fixed end of the retractable punch pin 11, and the punch pin fixing block 15 can be screwed by using a part with a pressing function, such as a bolt or a screw, so that the contact surface of the punch pin fixing block 15 and the retractable punch pin 11 applies a transverse tightening force to the retractable punch pin 11, and the installation is convenient, the retractable punch pin 11 is ensured to be stably and firmly installed, relative sliding, shaking or loosening is generated, and high accuracy and high stability during riveting are further ensured.

Specifically, an elastic pressing structure can be arranged on the periphery of the telescopic punch pin 11 or the periphery of the reverse pressure head 2, and is used for pressing a workpiece to be riveted at the rivet 8, placing and shaking the workpiece to be riveted, and ensuring the riveting reliability; taking the direction shown in fig. 3 as a reference, taking the example of being disposed in the first accommodating cavity as an example, the elastic pressing structure includes an elastic element 12 and a pressing block 13, wherein the elastic element 12 is disposed on the periphery of the retractable punch pin 11, and the upper and lower ends thereof are respectively contacted and pressed with the inner wall in the first accommodating cavity and the top of the pressing block 13; compact heap 13 sets up in the periphery of flexible towards needle 11 equally, and be located first holding intracavity, but the terminal surface of the protruding connecting block 3 of one end of keeping away from elastic component 12 on the compact heap 13, when connecting block 3 drives flexible towards needle 11 and pushes down, the bottom of this compact heap 13 can with treat the riveting workpiece contact, and the atress takes place relative movement with connecting block 3, then the relative rebound of compact heap 13 can compress elastic component 12, make elastic component 12 exert a pressure to compact heap 13 in reverse, guarantee that compact heap 13 can firmly compress tightly and treat the riveting workpiece, prevent the unusual circumstances such as rocking and aversion from appearing, lead to riveting dislocation or even inefficacy.

Alternatively, the elastic member 12 may be a spring, which is spirally disposed on the periphery of the retractable punch pin 11, and has a simple structure and a low cost.

Specifically, a limiting block 14 is fixedly arranged in the connecting block 3, the limiting block 14 is arranged on the periphery of the pressing block 13, is of a structure corresponding to the pressing block 13, and is also fixed at the opening end of the first accommodating cavity, and the upper surface of the limiting block 14 is used for abutting against the pressing block 13 when the pressing block 13 moves downwards, so that the pressing block 13 is prevented from falling out of the first accommodating cavity to cause an accident in the riveting process; in a possible embodiment of the present specification, the pressing block 13 may be a T-shaped annular member with a hollow middle portion, and the diameter of the upper portion of the pressing block 13 is greater than the diameter of the lower portion of the pressing block 13, so that the upper portion of the pressing block 13 is wider and can be abutted to a limit block 14 fixedly arranged below, and the pressing block 13 is ensured not to be easily disengaged; in another possible embodiment of the present disclosure, the limiting block 14 may be configured as two L-shaped ring-shaped members, and the diameter of the upper part of the limiting block 14 is smaller than that of the lower part of the limiting block 14, so as to increase the contact area with the connecting block 3 and improve the fixing reliability; in addition, in other possible embodiments of the present disclosure, the stopper 14 may be a threaded sleeve, which is convenient to install and is firmly fixed.

Specifically, as shown in fig. 3, a gasket 21 is further disposed between the back side pressing head 2 and the connecting block 3, that is, the gasket 21 can be inserted into the second accommodating cavity to adjust the height of the back side pressing head 2, so as to ensure the effectiveness of simultaneous riveting of the front side rivet 81 and the back side rivet 82; the thickness of the spacer 21 can be determined according to the actual product to be riveted, so long as it is ensured that the end surface of the back side press head 2 just contacts the back side rivet 82 when the telescopic punch pin 11 contacts the front side rivet 81; and to same kind of work piece and rivet 8 of waiting to rivet, only need test and confirm the gasket 21 thickness that needs to add when riveting for the first time, set up the gasket 21 of corresponding thickness in second holding chamber, follow-up can rivet automatically, need not adjust once more labour saving and time saving.

Specifically, as shown in fig. 2, in order to ensure that the rivet can be aligned during riveting, the double-sided riveting indenter is further provided with a guide block 4, wherein the guide block 4 is arranged on the periphery of the connecting block 3, and the diameter of the inner wall of the guide block 4 is equal to the diameter of the outer wall of the connecting block 3, that is, the guide block 4 and the connecting block 3 are in a state of being in contact but not in contact, so that the connecting block 3 can slide freely in the guide block 4, and meanwhile, the guide block 4 can also play a role in preventing the connecting block 3 from deviating and dislocating during pressing, so as to limit the pressing direction of the connecting block 3, and the riveting effect is good; in a possible embodiment of the present description, the length of the guide block 4 is not less than the length of the connecting block 3, so that the connecting block 3 has a sufficient stroke for riveting.

Specifically, the double-sided riveting pressure head further comprises a pressure cylinder 6, the pressure cylinder 6 is located above the connecting block 3, and a driving end 61 fixedly connected with the connecting block 3 is arranged in the pressure cylinder 6, so that when power is applied by the pressure cylinder 6, the driving end 61 can drive the connecting block 3 to vertically move in a telescopic manner inside the guide block 4, and the effect of simultaneously riveting the front side rivet 81 and the back side rivet 82 after one-time punching is completed can be achieved; in addition, it should be noted that the pressure cylinder 6 in this embodiment can implement pre-pressing type riveting, that is, during riveting, the front rivet 81, the back rivet 82 and the workpiece to be riveted are quickly pre-pressed and positioned through the quick stroke section of the pressure cylinder 6, so as to ensure that the three are fixed, and also ensure that the retractable punch pin 11 is aligned with the front rivet 81 and the back press head 2 is aligned with the back rivet 82, so that the subsequent pressure cylinder 6 starts the pressure section to rivet the rivet 8 quickly, the positioning is accurate, the riveting effect is good, and meanwhile, no instantaneous impact force is used during riveting, which is beneficial to reducing the wear of the retractable punch pin 11 and the like, and prolonging the service life.

Specifically, a fixing plate 5 can be further arranged between the guide block 4 and the pressure cylinder 6, as shown in fig. 1-2, the upper side of the fixing plate 5 is fixedly connected with the housing of the pressure cylinder 6, and the lower side of the fixing plate 5 is fixedly connected with the top of the guide block 4, so that the guide block 4 is fixedly connected with the pressure cylinder 6, and in addition, the surface area of the fixing plate 5 is large, the connection area between the fixing plate and the guide block and between the fixing plate and the pressure cylinder 6 can be increased, and the connection is more convenient and firm.

Specifically, in order to cooperate with a double-sided riveting ram, it is ensured that the retractable punch pin 11 can align with a front rivet 81 and the back ram 2 can accurately align with a back rivet 82 for riveting, a support column 71 and a back rivet assembly 72 are arranged on the support plate 7, as shown in fig. 2, wherein the support column 71 is used for positioning and placing the front rivet 81, and different workpieces to be riveted, of which riveting points are located at the front rivet 81, can also be positioned by positioning the front rivet 81; for convenience of positioning, the top of the supporting column 71 can be arranged to protrude out of the surface of the supporting plate 7, and a positioning groove matched with the front rivet 81 in shape is arranged at the top of the supporting column 71, so that the riveting effect is not easily affected by shaking after the front rivet 81 is positioned and placed; in addition, in a possible embodiment of the present specification, a magnetic absorption portion may be disposed in the supporting pillar 71, and the magnetic absorption portion may be the whole supporting pillar 71, or only a side wall of the positioning groove is set as the magnetic absorption portion, or the magnetic absorption portion may be separately detachable and disposed in the positioning groove, so that when the front rivet 81 is close to and ready to be disposed, the supporting pillar 71 can absorb the front rivet 81 by means of magnetic absorption force, which is beneficial to improving the positioning accuracy and improving the riveting reliability; in another possible embodiment of the present specification, the central line of the retractable punch pin 11 may be selected to be on the same straight line with the central line of the supporting pillar 71, especially the central line of the positioning groove, that is, the central line of the retractable punch pin 11 is on the same straight line with the central line of the positioned front rivet 81, so as to ensure that the punching force vertically acts on the front rivet 81, on one hand, prevent the retractable punch pin 11 or the front rivet 81 from deviating and dislocating during riveting, on the other hand, the purpose of stabilizing riveting can be achieved with the minimum punching force, which is beneficial to saving the punching force and energy of the riveting machine.

Specifically, as shown in fig. 2, the reverse rivet head assembly 72 is used for positioning a reverse rivet 82 and different workpieces to be riveted positioned by the reverse rivet 82, similar to the support column 71, and the top thereof can also be provided as a structure protruding from the upper surface of the support plate 7; in one possible embodiment of the present specification, the reverse rivet head assembly 72 may include a positioning portion 720 located at the top and a fixing punch 721 located below the positioning portion 720, and the fixing punch 721 is located inside the reverse rivet head assembly 72, the reverse rivet 82 is positioned in the positioning portion 720, after the top of the fixing punch 721 contacts with the bottom of the reverse rivet 82, the reverse indenter 2 presses down to cooperate with the top of the fixing punch 721 to complete riveting of the reverse rivet 82; in another possible embodiment of the present description, the center line of the fixing punch 721 and the center line of the back rivet 82 are on the same straight line, and the center line of the back indenter 2 and the center line of the back rivet 82 may be on the same straight line or not, as long as it is ensured that the diameter of the back indenter 2 is larger than the maximum diameter of the back rivet 82, and when the two are in contact, the contact surface of the back rivet 82 is located within the range of the bottom surface of the back indenter 2, and the fault tolerance is high without affecting the riveting effect; in other possible embodiments of the present disclosure, a magnetic part may also be disposed in the back rivet head assembly 72, so as to facilitate positioning of the back rivet 82, and improve positioning accuracy and riveting reliability.

During riveting, a workpiece to be riveted, a front rivet 81 and a back rivet 82 are positioned and placed on the supporting plate 7, then the pressure cylinder 6 drives the connecting block 3 and the front rivet head assembly 1 and the back pressure head 2 in the connecting block 3 to synchronously press down until the pressing block 13 contacts the surface of the workpiece to be riveted on the periphery of the front rivet 81, the pressing block is stressed to generate upward relative displacement, the elastic part 12 is stressed and compressed, downward pressure is reversely applied to the pressing block 13, the pressing block 13 is enabled to press the workpiece to be riveted, and at the moment, the telescopic punch pin 11 just presses the front rivet 81 to the bottom of the positioning groove without applying riveting pressure on the front rivet 81; if the riveting process is the first time, whether the back side pressure head 2 just presses the back side rivet 82 to the bottom of the positioning part 720 without applying riveting pressure on the back side rivet 82 is required to be judged at the moment, if the back side pressure head 2 does not apply the riveting pressure on the back side rivet 82, the gasket 21 is required to be manually added to adjust the height of the back side pressure head 2 until the back side pressure head 2 simultaneously reaches a state that the back side rivet 82 is just pressed to the bottom of the positioning part 720 without applying the riveting pressure on the back side rivet 82, the prepressing and fixing of the workpiece to be riveted and the rivet in a quick stroke section are completed, the gasket 21 is not required to be adjusted in a quick stroke section in the subsequent riveting process, and the prepressing and fixing can be directly carried out; then, the pressurizing cylinder 6 starts the pressurizing section to rivet and press the front rivet 81 and the back rivet 82 simultaneously, and the pressurizing cylinder 6 retracts after riveting.

According to the embodiment, the invention has the following beneficial effects:

1. connecting block one end sets up positive die subassembly and reverse side pressure head, and both can push down in step, rivet the rivet of placing at last rivet and bottom at the top respectively and place the rivet at last, and the riveting when realizing different rivets on the multiple spot, the upset number of times of work piece in the whole production process can be reduced, saves the production time that the upset operation corresponds, promotes riveting efficiency greatly, shortens product production cycle.

3. Set up the height of gasket adjustment reverse side pressure head for flexible towards the needle and the top just contact but do not exert stamping force when placing the rivet at last, the reverse side pressure head also just contacts the bottom at last rivet of placing and does not exert stamping force to the rivet, and the degree of adaptability is good, guarantees riveted reliability simultaneously.

4. The double-sided riveting pressure head and the supporting plate in the double-sided riveting mechanism are mutually matched, so that rivets in different placement directions are riveted at the same time, the positioning is accurate, the fixing is firm, at least 50% of punching times of the product can be saved, the turnover times of the product in the riveting process can be greatly reduced, the riveting efficiency and the overall production efficiency are greatly improved, energy sources required by punching are saved, and the production cost is saved.

5. The prepressing type pressure cylinder is adopted, the workpiece to be riveted and the rivet are quickly prepressed and fixed through the quick stroke section, riveting is carried out through the pressure increasing section, instantaneous impact force is not used during riveting, the telescopic punching needle and the fixed punching needle are not prone to abrasion, the service life of the double-faced riveting mechanism is prolonged, industrial accidents are avoided, and safety of the production process is improved.

While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention as defined by the claims.

Claims

1. A double-sided riveting pressure head is used for simultaneously riveting rivets (8) with different placing directions and is characterized by comprising a front side riveting head component (1), a back side pressing head (2) and a connecting block (3), wherein the front side riveting head component (1) is connected with the back side pressing head (2) through the connecting block (3), and the front side riveting head component (1) and the back side pressing head (2) can move together; the front rivet head assembly (1) comprises a telescopic punching needle (11), one end of the telescopic punching needle (11) is fixedly connected with the inside of the connecting block (3), and the other end of the telescopic punching needle (11) is used for being matched and riveted with the top of the rivet (8); the reverse side pressure head (2) is used for being matched and riveted with the bottom of the rivet (8).

2. A double-sided riveting ram according to claim 1, characterized in that the obverse-sided riveting head assembly (1) or the reverse-sided riveting head (2) is provided with an elastic pressing structure for pressing a workpiece to be riveted at the rivet (8); the elastic pressing structure comprises an elastic piece (12) and a pressing block (13), the elastic piece (12) is arranged on the periphery of the telescopic punch pin (11) or the reverse pressing head (2), and two ends of the elastic piece (12) are respectively used for tightly pressing the inside of the connecting block (3) and the pressing block (13); the pressing block (13) is arranged on the periphery of the telescopic punch pin (11) or the periphery of the reverse pressure head (2), one end of the pressing block (13) is used for being tightly propped against the end face of the elastic piece (12), the other end of the pressing block (13) protrudes out of the end face of the connecting block (3), and the pressing block (13) can vertically move relative to the connecting block (3).

3. A double-sided riveting pressure head according to claim 2, characterized in that a limiting block (14) is further fixedly arranged inside the connecting block (3), the limiting block (14) is located at the periphery of the pressing block (13), and the upper surface of the limiting block (14) is used for abutting against the pressing block (13).

4. The double-sided riveting ram according to claim 1, wherein a punch pin fixing block (15) is further arranged in the connecting block (3), and the punch pin fixing block (15) is used for tightly propping against one end of the telescopic punch pin (11).

5. A double-sided riveting ram according to claim 1, characterized in that a spacer (21) is also arranged between the back-side indenter (2) and the connecting block (3), the spacer (21) being located at the top of the back-side indenter (2) for adjusting the height of the back-side indenter (2).

6. A double-sided riveting ram according to claim 1, characterized in that it further comprises a guide block (4), the guide block (4) being arranged peripherally to the connecting block (3), and the connecting block (3) being vertically telescopically movable with respect to the guide block (4).

7. A double-sided riveting ram according to claim 6, characterized in that the length of the guide block (4) is not less than the length of the connecting block (3).

8. The double-sided riveting press head according to claim 1, characterized in that the double-sided riveting press head further comprises a pressure cylinder (6), wherein a driving end (61) is arranged in the pressure cylinder (6), and the driving end (61) is fixedly connected with the connecting block (3) and is used for driving the connecting block (3) to move telescopically.

9. A double-sided riveting ram according to claim 8, characterized in that one end of the guide block (4) is also provided with a fixed plate (5), one side of the fixed plate (5) is fixedly connected with the guide block (4), and the other side of the fixed plate (5) is fixedly connected with the pressure cylinder (6).

10. A double-sided riveting mechanism, characterized in that it comprises a support plate (7) and a double-sided riveting indenter according to any one of claims 1-9, the support plate (7) being located below the double-sided riveting indenter for positioning rivets (8) placed in different directions and workpieces to be riveted.

11. A double-sided riveting mechanism according to claim 10, wherein a support column (71) and a reverse riveting head assembly (72) are arranged on the support plate (7), the support column (71) is used for positioning the rivet (8) placed on the top and different workpieces to be riveted connected through the rivet (8), the reverse riveting head assembly (72) is used for positioning the rivet (8) placed on the bottom and different workpieces to be riveted connected through the rivet (8), and the top of the support column (71) and the top of the reverse riveting head assembly (72) both protrude out of the upper surface of the support plate (7).

12. A double-sided riveting mechanism according to claim 11, characterized in that the centre line of the telescopic punch pin (11) is collinear with the centre line of the support pillar (71).

13. A double-sided riveting mechanism according to claim 11, wherein the reverse riveting head assembly (72) comprises a positioning part (720) at the top and a fixing punch (721) at the inside, the positioning part (720) is used for positioning the rivet (8) placed at the bottom, and the top of the fixing punch (721) is matched with the reverse indenter (2) for riveting the rivet (8) at the bottom.

14. A double-sided riveting mechanism according to claim 13, characterized in that the centre line of the reverse indenter (2) is collinear with the centre line of the fixed punch pin (721).

15. A riveting machine comprising at least one set of double-sided riveting mechanisms according to any of claims 10 to 14.