CN114042854A

CN114042854A - Automatic riveting equipment for driven plate assembly

Info

Publication number: CN114042854A
Application number: CN202111417512.4A
Authority: CN
Inventors: 陈雷; 马振来; 侯宁; 汤海超; 李阳; 李剑; 姜平; 刘志强
Original assignee: Changchun Yidong Clutch Co ltd
Current assignee: Changchun Yidong Clutch Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-02-15

Abstract

An automatic riveting device for a driven plate assembly belongs to the technical field of clutch part processing. The invention aims to change the manual riveting process of an operator into the automatic riveting equipment of the driven disc assembly, which is used for automatically conveying rivets and automatically riveting the driven disc and the transmission disc assembly. The invention comprises a riveting mechanism and a turntable mechanism which are arranged on a rack and matched with each other. The invention improves the one-time qualification rate of the product, optimizes the process, improves the production efficiency, reduces the manufacturing cost and reduces the labor intensity of operators.

Description

Automatic riveting equipment for driven plate assembly

Technical Field

The invention belongs to the technical field of clutch part processing.

Background

The existing clutch driven plate assembly is riveted in a first process, the riveting process of a driven plate and a driving plate is that an operator places the driven plate according to the riveting position, the operator places the hole position of the driving plate corresponding to the hole position of the driven plate, 12 rivets penetrate into rivet holes, the hand-held end-flat driving plate finely adjusts and rotates, the fact that the rivets completely fall into the holes of the driving plate and the driven plate is confirmed, the operator steps on an equipment pedal, the rivets are extruded and upset, and the driven plate and the driving plate assembly are riveted.

Disclosure of Invention

The invention aims to change the manual riveting process of an operator into the automatic riveting equipment of the driven disc assembly, which is used for automatically conveying rivets and automatically riveting the driven disc and the transmission disc assembly.

The invention comprises a riveting mechanism and a turntable mechanism which are arranged on a rack and matched with each other,

riveting mechanism: the riveting base is provided with a C-shaped groove, a gas-liquid pressure cylinder is arranged on the riveting base at the upper end of the C-shaped groove, a piston rod of the gas-liquid pressure cylinder penetrates through the upper edge of the riveting base, a cylinder connecting piece is arranged at the end part of the gas-liquid pressure cylinder, and the cylinder connecting piece is clamped on the connecting base; an inverted L-shaped connecting block is fixedly installed at the lower end of the connecting seat, a sliding sleeve is installed on the rear side of the inverted L-shaped connecting block, the sliding sleeve is matched with a sliding rail, and the sliding rail is fixedly installed on the rear side wall of the C-shaped groove; a punching rod is fixedly arranged on the inverted L-shaped connecting block and extends into the air pressure head from the punch head inlet; side fixing plates are fixedly arranged on the side walls of the two sides of the riveting seat, an air pressure head mounting plate is fixedly arranged between the two side fixing plates, an air pressure head fixing frame is fixedly arranged on the air pressure head mounting plate, an air pressure head is fixedly arranged on the air pressure head fixing frame, and the upper end of the air pressure head is fixed on an air pressure head connecting block; a positioning bracket is arranged at the front end of the air pressure head connecting block, and a positioning pre-pressing head is arranged at the position of the positioning bracket, which corresponds to the workpiece downwards; a lower punching die is arranged on the lower side of the C-shaped groove of the riveting seat, and corresponds to the lower end of the air pressure head;

cylinder connecting piece and connecting seat joint structure: a circle of annular groove is formed in the cylinder connecting piece, a long groove is formed in the connecting seat, a protruding edge is arranged at the upper end of the long groove, the lower end of the cylinder connecting piece is inserted into the long groove, and the protruding edge is inserted into the annular groove;

a gas pressure head: the pneumatic head is characterized in that a vertical stamping channel and an inclined nail conveying channel which are communicated with each other are arranged in a body of the pneumatic head, a punch head placing port is arranged at the upper end of the vertical stamping channel, a nail conveying port connector is arranged at the upper end of the inclined nail conveying channel, and the nail conveying port connector is communicated with pneumatic rivet input equipment through a pipeline; the lower ends of the vertical stamping channel and the inclined nail conveying channel are communicated with the stamping nail conveying channel;

a turntable mechanism: the device comprises a rotary table rotating mechanism, a rotary table fixture mechanism and a positioning mechanism, wherein the rotary table fixture mechanism is arranged on a rotary table of the rotary table rotating mechanism, at least two sets of rotary table fixture mechanisms are arranged, one set of rotary table fixture mechanism is a working rotary table mechanism, and the other set of rotary table fixture mechanism is a preparatory rotary table mechanism;

a rotary table rotating mechanism: the inner part of the rotary table fixing support is hollow, the motor is fixed on the outer side of the rotary table fixing support, a motor shaft of the motor extends into the inner part of the rotary table fixing support and is connected with the speed change mechanism, the upper end of a rotary table shaft connected with the upper end of the speed change mechanism is fixedly provided with a rotary table, a rotary support gear is arranged on the rotary table shaft between the rotary table and the rotary table fixing support, the upper end of the rotary table fixing support is provided with a swing lock seat, a swing rod is arranged on the swing lock seat, the front end of the swing rod is provided with a plane lock tooth, and the inner surface of the plane lock tooth is provided with a flat tooth meshed with the rotary support gear;

turntable fixture mechanism: a driven plate center fixing shaft is arranged in the middle of the upper surface of the driven plate tray, an elastic tensioning tongue is arranged on the outer side of the driven plate center fixing shaft, and a plurality of positioning pins are arranged on the driven plate tray corresponding to the process holes in the driven plate; the bearing block is fixed on the rotary table, a rotary table shaft is arranged in the bearing block through a bearing, the lower end of the rotary table shaft is connected with a motor shaft of a rotary motor, the upper end of the rotary table shaft is provided with the rotary table, a rotary table fixing pin penetrates through the rotary table, the top end of the rotary table fixing pin is fixedly connected with the bottom end of a driven disc tray, and a rotary table spring is sleeved on the rotary table fixing pin between the driven disc tray and the rotary table;

a positioning mechanism: the positioning mechanism is divided into a working end positioning mechanism and a preparation end positioning mechanism,

work end positioning mechanism: the side surface of a fixed support of the rotary table is provided with an L-shaped bracket, the air cylinder is fixed on the L-shaped bracket, the top end of a piston rod of the air cylinder is provided with a pull head, the top end of the pull head is provided with an inverted T-shaped clamping groove, the lower end of the pull rod is provided with an inverted T-shaped hook, the inverted T-shaped hook is matched and arranged in the inverted T-shaped clamping groove, the rotary table is provided with a through hole with the outer diameter larger than that of the pull rod, the rotary table corresponding to the through hole is provided with a sliding sleeve, a top plug with the lower end matched with the sliding sleeve is arranged in the sliding sleeve, and a top plug head at the upper end of the top plug corresponds to a positioning groove below a driven disc tray in a rotary mechanism of the rotary table;

preparatory end positioning mechanism: a preparatory positioning cylinder is arranged on the stand corresponding to the preparatory turntable mechanism, a positioning plug is arranged at the top end of a piston rod of the preparatory positioning cylinder, and the positioning plug corresponds to the slot on the bottom surface of the rotating motor.

The invention takes the customer demand as the pulling, takes the punctual production as the target, fully combines the production factors such as people, machines, materials, methods, rings and the like, realizes the streamlined production and the metronomic production, has the production line process level suitable for the field reality, and is a high-tech content and high-level production automatic production line. The one-time qualification rate of the product is improved, the technological process is optimized, the production efficiency is improved, the manufacturing cost is reduced, and the labor intensity of operators is reduced.

Drawings

FIG. 1 is a general schematic of the present invention;

FIG. 2 is a side view of the riveting mechanism of the invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view of a clamping structure of the cylinder connector and the connecting seat of the present invention;

FIG. 5 is a schematic view of a pneumatic head according to the present invention;

FIG. 6 is a three-dimensional effect diagram of portion A of FIG. 2 of the present invention;

FIG. 7 is a schematic view of the turntable mechanism of the present invention;

FIG. 8 is an enlarged view of portion B (working end positioning mechanism) of FIG. 7 in accordance with the present invention;

FIG. 9 is an enlarged view of a portion of the rotary power of the turntable of the present invention;

FIG. 10 is a schematic view of the turntable clamp mechanism of the present invention;

FIG. 11 is an enlarged view of the preparatory end positioning mechanism according to the present invention;

in the above fig. 1, 2 and 3, the fixing mechanism of the air pressure head is removed to show the structure; shown in detail in fig. 6.

Detailed Description

The riveting mechanism comprises a riveting mechanism 1 and a rotary table mechanism 2 which are arranged on a rack 3 and matched with each other, wherein the rack 3 is only a frame body and is used for supporting the riveting mechanism 1 and the rotary table mechanism 2, and the riveting mechanism 1 is used for conveying rivets and has two functions of riveting a driven disc and a transmission disc; the turntable mechanism 2 is provided with two placing tables (namely a working turntable fixture mechanism and a preparation turntable fixture mechanism which have the same structure), namely, the working turntable fixture mechanism is positioned at the riveting position of the riveting mechanism, the preparation turntable fixture mechanism is positioned at the position where a driven plate and a transmission plate are positioned by a worker, and the working turntable fixture mechanism and the preparation turntable fixture mechanism are switched back and forth by rotating the whole turntable, so that reciprocating work is carried out, and the two placing tables are always in a working state and a preparation state.

Riveting mechanism 1: the riveting seat 5 is provided with a C-shaped groove 6, a gas-liquid pressure cylinder 4 is installed on the riveting seat 5 at the upper end of the C-shaped groove 6, the gas-liquid pressure cylinder 4 can adopt air pressure or hydraulic pressure, a piston rod of the gas-liquid pressure cylinder 4 penetrates through the upper edge of the riveting seat 5 and is provided with a cylinder connecting piece 7 at the end part, the cylinder connecting piece 7 is connected to the connecting seat 8 in a clamping manner, and the piston rod of the gas-liquid pressure cylinder 4 can push the cylinder connecting piece 7 and the connecting seat 8 to work simultaneously.

8 lower extreme fixed mounting of connecting seat has the connecting block 15 of falling L shape, the sliding sleeve 12 is installed to the connecting block 15 rear side of falling L shape, sliding sleeve 12 matches with slide rail 13, slide rail 13 fixed mounting is on the lateral wall behind C shape recess 6, the connecting block 15 of falling L shape and connecting seat 8 fixed connection, so, also reciprocate simultaneously along with reciprocating of connecting seat 8, and reciprocate through sliding sleeve 12 and slide rail 13's cooperation, sliding sleeve 12 has played the stable connecting block 15 of falling L shape and has removed the orbit with slide rail 13 simultaneously.

A punching rod 17 is fixedly installed on the inverted L-shaped connecting block 15, and the punching rod 17 extends into the air pressure head 11 from a punch placing port 21, which is described in detail below and will not be described herein.

Side fixing plates 27 are fixedly installed on the side walls at the two sides of the riveting seat 5, an air pressure head installing plate 26 is fixedly installed between the two side fixing plates 27, an air pressure head fixing frame 25 is fixedly installed on the air pressure head installing frame 26, the air pressure head 11 is fixedly installed on the air pressure head fixing frame 25, the upper end of the air pressure head 11 is fixed on the air pressure head connecting block 16, the two side fixing plates 27 are respectively arranged at the two sides of the riveting seat 5, the air pressure head installing plate 26 is clamped in the middle, the two parts form a hanging frame, then the air pressure head fixing frame 25 for installing the air pressure head 11 is installed on the hanging frame, if the hanging frame is reasonably processed in position, the air pressure head fixing frame 25 can be eliminated, the air pressure head 11 is directly installed on the hanging frame, and therefore, the air pressure head 11 can be simultaneously stabilized through the air pressure head fixing frame 25 at the side and the air pressure head connecting block 16 at the top end, no deviation occurs during operation.

A positioning bracket 10 is arranged at the front end of the air pressure head connecting block 16, and a positioning prepressing head 9 is arranged at the position of the positioning bracket 10, which corresponds to the workpiece downwards; the part is an auxiliary part, so the number of the positioning prepressing heads 9 is generally three, the three positioning prepressing heads 9 are arranged in a triangular mode, and the lower ends of the three positioning prepressing heads correspond to the flat surfaces of the driven disc respectively, so that whether the driven disc under the pneumatic head is flat or not can be known.

A lower punch die 14 is arranged on the lower side of the C-shaped groove 6 of the riveting seat 5, and the lower punch die 14 corresponds to the lower end of the air pressure head 11; the lower die 14 is a fixed die which is stressed in the opposite direction of the stamping rod 17 in the air pressure head 11, and when the stamping rod 17 stamps the rivet downwards, the rivet is riveted and deformed by the extrusion of the stamping rod 17 and the lower die 14, so that the driven plate and the transmission plate are riveted and fixed together.

Cylinder connecting piece

7 and 8 joint structures of connecting seat: a circle of ring grooves 18 are formed in the cylinder connecting piece 7, long grooves 20 are formed in the connecting seat 8, protruding edges 19 are arranged at the upper ends of the long grooves 20, the lower end of the cylinder connecting piece 7 is inserted into the long grooves 20, and the protruding edges 19 are inserted into the ring grooves 18; the cylinder connecting piece 7 slides the head of the cylinder connecting piece 7 into the long groove 20 through the matching of the ring groove 18 and the protruding edge 19, so that the cylinder connecting piece 7 and the connecting seat 8 can be relatively fixed, the thickness and the outer diameter of the head of the cylinder connecting piece 7 are approximately the same as those of the long groove 20, namely zero clearance fit is realized, and the synchronous work of the cylinder connecting piece 7 and the connecting seat 8 is basically ensured.

The air pressure head 11: a vertical stamping channel and an inclined nail conveying channel which are mutually communicated are arranged in a body 24 of the pneumatic head 11, a punch head placing inlet 21 is arranged at the upper end of the vertical stamping channel, a nail conveying inlet joint 22 is arranged at the upper end of the inclined nail conveying channel, and the nail conveying inlet joint 22 is communicated with pneumatic rivet input equipment through a pipeline; the lower ends of the vertical stamping channel and the inclined nail conveying channel are communicated with the stamping nail conveying channel 23; the pneumatic rivet input device is an existing device, rivets can be conveyed to a designated position through the pneumatic function, the pneumatic head 11 has two functions, the first function is that the rivets are conveyed to the rivet input port joint 22 through the pneumatic rivet input device, enter the punching rivet conveying channel 23 through the inclined rivet conveying channel, are finally output from the lower end of the punching rivet conveying channel 23 and fall into a riveting hole of a driven disc and a driving disc, after the rivets are placed, the pneumatic and hydraulic pressure cylinder 4 works, a piston rod of the pneumatic and hydraulic pressure cylinder 4 sequentially pushes the cylinder connecting piece 7, the connecting seat 8, the inverted L-shaped connecting block 15 and the punching rod 17 to move downwards simultaneously, as the front end of the punching rod 17 extends into the upper end of the punch placing port 21, the front end of the punching rod 17 continues to move downwards along the vertical punching rivet conveying channel 23 and abuts against the upper end of the rivets, and is extruded and punched through the cooperation with the lower punch 14, and (4) extruding and deforming the rivet until riveting is completed.

The turntable mechanism 2: the device comprises a rotary table rotating mechanism, a rotary table clamping mechanism 28 and a positioning mechanism, wherein the rotary table clamping mechanism is arranged on a rotary table 32 of the rotary table rotating mechanism, at least two sets of rotary table clamping mechanisms are arranged, one set of rotary table clamping mechanism is a working rotary table clamping mechanism, and the other set of rotary table clamping mechanism is a preparatory rotary table clamping mechanism; the turntable mechanism 2 can be used for placing components and conveying the components to corresponding positions of the riveting mechanism 1, then the riveting mechanism 1 rivets the driven disc and the driving disc together, the working turntable clamp mechanism is the turntable clamp mechanism which is arranged at the corresponding position of the riveting mechanism 1 for riveting, and the preparation turntable clamp mechanism is the mechanism for placing the driven disc and the driving disc on the turntable clamp mechanism by workers. Due to the rotation of the rotary table, the positions of the working rotary table fixture mechanism and the preparation rotary table fixture mechanism can be exchanged in identity, and therefore the riveting process can be continuous due to the reciprocating.

A rotary table rotating mechanism: the inside of the rotary table fixing support 34 is hollow, the motor 30 is fixed on the outer side of the rotary table fixing support 34, a motor shaft of the motor 30 extends into the inside of the rotary table fixing support 34 and is connected with the speed change mechanism 31, the upper end of a rotary table shaft 35 connected with the upper end of the speed change mechanism 31 is fixedly provided with a rotary table 32, a rotary supporting gear 43 is arranged on the rotary table shaft 35 between the rotary table 32 and the rotary table fixing support 34, the upper end of the rotary table fixing support 34 is provided with a swing lock seat 44, a swing rod 45 is arranged on the swing lock seat 44, the front end of the swing rod 45 is provided with a plane locking tooth 42, and the inner surface of the plane locking tooth 42 is provided with a flat tooth meshed with the rotary supporting gear 43; the rotary table rotating mechanism is a power mechanism which governs the rotation of the whole rotary table, a power source is from a motor 30, a gear box (a speed change mechanism 31) is driven by the motor 30, and power is transmitted to a rotary table shaft 35 through the gear box so as to drive the rotary table 32 on the rotary table to rotate, so that the working rotary table clamp mechanism and the preparatory rotary table clamp mechanism on the rotary table 32 are switched; the plane lock teeth 42, the swing lock seat 44 and the swing rod 45 form a locking mechanism, and swing is carried out by the swing rod 45 by taking the swing lock seat 44 as a shaft, so that teeth on a plane on the plane lock teeth 42 are driven to be meshed with teeth on the rotary supporting gear 43, locking is completed, and otherwise, locking can be released. This part can be operated manually or by using existing electrical control means, and after locking, a positioning pin can be provided in the pendulum lock seat 44 for locking the locking mechanism, and this positioning pin must be capable of being released or locked at any time.

Turntable clamp mechanism 28: a driven disc center fixing shaft 47 is arranged in the middle of the upper surface of the driven disc tray 49, an elastic tensioning tongue 54 is arranged on the outer side of the driven disc center fixing shaft 47, and a plurality of positioning pins 48 are arranged on the driven disc tray 49 corresponding to the fabrication holes in the driven disc; a bearing seat 52 is fixed on the rotary table 32, a rotary table shaft 55 is arranged in the bearing seat 52 through a bearing, the lower end of the rotary table shaft 55 is connected with a motor shaft of a rotating motor 53, the upper end of the rotary table shaft 55 is provided with a rotary table 46, a rotary table fixing pin 51 penetrates through the rotary table 46, the top end of the rotary table fixing pin is fixedly connected with the bottom end of a driven disc tray 49, and a rotary table spring 50 is sleeved on the rotary table fixing pin 51 between the driven disc tray 49 and the rotary table 46; the turret clamp mechanism 28 is an operating table that is conventionally used in two, a work turret clamp mechanism and a preparatory turret clamp mechanism, i.e., one in the riveting and the other in the placing of the work piece.

Bearing seat 52 in the turntable clamping mechanism 28 is a fixed connecting member for the whole turntable clamping mechanism to be mounted on the turntable and to be able to rotate independently for the turntable, so that, by using the bearing seat, the inside of the turntable shaft 55 is connected by a bearing, the power of this rotation is obtained by rotating motor 53, and rotating motor 53 can be controlled by a stepping motor as required.

The driven plate center fixing shaft 47 and the positioning pin 48 on the surface of the turntable chuck mechanism 28 are fabrication holes corresponding to the driven plate and the driving plate, so that the driven plate and the driving plate can be positioned on the surface of the driven plate tray 49 without rotation.

The elastic tension tongue 54 arranged at the edge of the driven disc central fixed shaft 47 in the turntable clamp mechanism 28 is an elastic element controlled by an internal spring, after the driven disc central fixed shaft 47 is sleeved in the driven disc central hole, the driven disc central fixed shaft is fastened by the tension of the elastic tension tongue 54, and when the riveted driven disc and driving disc are dismounted, the fastening can be released as long as the elastic tension tongue 54 retracts.

A positioning mechanism: the positioning mechanism is divided into a working end positioning mechanism and a preparation end positioning mechanism, the positioning mechanism is set for the purpose that the corresponding riveting position of the rotary table mechanism 2 and the riveting mechanism 1 is accurate, and the two positioning mechanisms are arranged to enable the accuracy to be higher. The working end positioning mechanism is a positioning mechanism which is close to one side of the riveting mechanism 1 and corresponds to the working turntable fixture mechanism, and the preparation end positioning mechanism is a positioning mechanism which is close to one side of the preparation turntable fixture mechanism and corresponds to the preparation turntable fixture mechanism.

Work end positioning mechanism: an L-shaped bracket 37 is arranged on the side surface of the rotary table fixing support 34, the air cylinder 36 is fixed on the L-shaped bracket 37, the top end of a piston rod of the air cylinder 36 is provided with a pull head 41, the top end of the pull head 41 is provided with an inverted T-shaped clamping groove 58, the lower end of the pull rod 56 is provided with an inverted T-shaped hook 39, the inverted T-shaped hook 39 is arranged in the inverted T-shaped clamping groove 58 in a matching way, the rotary table 32 is provided with a through hole with the outer diameter larger than that of the pull rod 56, the rotary table 32 corresponding to the through hole is provided with a sliding sleeve 57, a top plug 38 with the lower end matched with the sliding sleeve 57 is arranged in the sliding sleeve 57, and a top plug head 40 at the upper end of the top plug 38 corresponds to a positioning groove below a driven disc tray 49 in the rotary table rotating mechanism 28; locking and loosening of the working end positioning mechanism are completed by driving the pull rod 56 through the extension and retraction of the piston rod of the air cylinder 36, when the piston rod moves upwards, the pull rod 56 penetrates through a through hole in the rotary table 32 and extends into the sliding sleeve 57 to push the top plug 38 to move upwards, at the moment, the top plug head 40 at the top end of the top plug 38 extends into a positioning hole below the working end rotary table fixture mechanism to be positioned, at the moment, the working end rotary table fixture mechanism is placed to rotate, and the working end rotary table fixture mechanism can be supported.

Preparatory end positioning mechanism: a preliminary positioning cylinder 33 is attached to the stand 3 corresponding to the preliminary turntable mechanism, a positioning plug 60 is attached to the top end of a piston rod 59 of the preliminary positioning cylinder 33, and the positioning plug 60 corresponds to a groove in the bottom surface of the rotating motor 53. The prepared end positioning mechanism is relatively simple, and the piston rod 59 of the prepared positioning cylinder 33 pushes the positioning plug 60 at the top end to be inserted into the jack at the bottom end of the prepared rotary table fixture mechanism, so that the positioning and supporting functions are achieved.

Claims

1. The utility model provides an automatic riveting equipment of driven plate closing member which characterized in that: comprises a riveting mechanism (1) and a turntable mechanism (2) which are arranged on a rack (3) and are matched with each other,

riveting mechanism (1): the riveting base (5) is provided with a C-shaped groove (6), a gas-liquid pressure cylinder (4) is arranged on the riveting base (5) at the upper end of the C-shaped groove (6), a piston rod of the gas-liquid pressure cylinder (4) penetrates through the upper edge of the riveting base (5), an air cylinder connecting piece (7) is arranged at the end part of the piston rod, and the air cylinder connecting piece (7) is clamped on the connecting base (8); an inverted L-shaped connecting block (15) is fixedly installed at the lower end of the connecting seat (8), a sliding sleeve (12) is installed on the rear side of the inverted L-shaped connecting block (15), the sliding sleeve (12) is matched with a sliding rail (13), and the sliding rail (13) is fixedly installed on the rear side wall of the C-shaped groove (6); a punching rod (17) is fixedly arranged on the inverted L-shaped connecting block (15), and the punching rod (17) extends into the air pressure head (11) from a punching head inlet (21); side fixing plates (27) are fixedly installed on the side walls of two sides of the riveting seat (5), an air pressure head installation plate (26) is fixedly installed between the two side fixing plates (27), an air pressure head fixing frame (25) is fixedly installed on the air pressure head installation plate (26), an air pressure head (11) is fixedly installed on the air pressure head fixing frame (25), and the upper end of the air pressure head (11) is fixed on an air pressure head connecting block (16); a positioning bracket (10) is arranged at the front end of the air pressure head connecting block (16), and a positioning pre-pressing head (9) is arranged at the position of the positioning bracket (10) corresponding to a workpiece downwards; a lower punching die (14) is arranged on the lower side of the C-shaped groove (6) of the riveting seat (5), and the lower punching die (14) corresponds to the lower end of the air pressure head (11);

cylinder connecting piece (7) and connecting seat (8) joint structure: a circle of ring groove (18) is formed in the cylinder connecting piece (7), a long groove (20) is formed in the connecting seat (8), a protruding edge (19) is arranged at the upper end of the long groove (20), the lower end of the cylinder connecting piece (7) is inserted into the long groove (20), and the protruding edge (19) is inserted into the ring groove (18);

pneumatic head (11): a vertical stamping channel and an inclined nail conveying channel which are mutually communicated are arranged in a body (24) of the air pressure head (11), a punch head placing inlet (21) is formed in the upper end of the vertical stamping channel, a nail conveying inlet joint (22) is installed at the upper end of the inclined nail conveying channel, and the nail conveying inlet joint (22) is communicated with air pressure rivet input equipment through a pipeline; the lower ends of the vertical stamping channel and the inclined nail conveying channel are communicated with a stamping nail conveying channel (23);

turntable mechanism (2): the automatic positioning device comprises a rotary table rotating mechanism, a rotary table fixture mechanism (28) and a positioning mechanism, wherein the rotary table fixture mechanism is arranged on a rotary table (32) of the rotary table rotating mechanism, at least two sets of rotary table fixture mechanisms are arranged, one set of rotary table fixture mechanism is a working rotary table mechanism, and the other set of rotary table fixture mechanism is a preparation rotary table mechanism;

a rotary table rotating mechanism: the inner part of the rotary table fixing support (34) is hollow, the motor (30) is fixed on the outer side of the rotary table fixing support (34), a motor shaft of the motor (30) extends into the inner part of the rotary table fixing support (34) and is connected with the speed change mechanism (31), the upper end of a rotary table shaft (35) connected with the upper end of the speed change mechanism (31) is fixedly provided with a rotary table (32), a rotary supporting gear (43) is arranged on the rotary table shaft (35) between the rotary table (32) and the rotary table fixing support (34), the upper end of the rotary table fixing support (34) is provided with a swing lock seat (44), a swing rod (45) is arranged on the swing lock seat (44), the front end of the swing rod (45) is provided with a plane lock tooth (42), and the inner surface of the plane lock tooth (42) is provided with a flat tooth meshed with the rotary supporting gear (43);

turntable clamp mechanism (28): a driven plate central fixing shaft (47) is arranged in the middle of the upper surface of the driven plate tray (49), an elastic tensioning tongue (54) is arranged on the outer side of the driven plate central fixing shaft (47), and a plurality of positioning pins (48) are arranged on the driven plate tray (49) corresponding to the process holes in the driven plate; the rotary table is characterized in that a bearing seat (52) is fixed on a rotary table (32), a rotary table shaft (55) is installed in the bearing seat (52) through a bearing, the lower end of the rotary table shaft (55) is connected with a motor shaft of a rotating motor (53), a rotary table (46) is installed at the upper end of the rotary table shaft (55), a rotary table fixing pin (51) penetrates through the rotary table (46), the top end of the rotary table fixing pin is fixedly connected with the bottom end of a driven disc tray (49), and a rotary table spring (50) is sleeved on the rotary table fixing pin (51) between the driven disc tray (49) and the rotary table (46);

work end positioning mechanism: an L-shaped bracket (37) is installed on the side face of a rotary table fixing support (34), an air cylinder (36) is fixed on the L-shaped bracket (37), a pull head (41) is installed at the top end of a piston rod of the air cylinder (36), an inverted T-shaped clamping groove (58) is formed in the top end of the pull head (41), an inverted T-shaped hook (39) is arranged at the lower end of a pull rod (56), the inverted T-shaped hook (39) is installed in the inverted T-shaped clamping groove (58) in a matched mode, a through hole larger than the outer diameter of the pull rod (56) is formed in the rotary table (32), a sliding sleeve (57) is installed on the rotary table (32) corresponding to the through hole, a top plug (38) with the lower end matched with the sliding sleeve (57) is arranged in the sliding sleeve (57), and a top plug head (40) at the upper end of the top plug (38) corresponds to a positioning groove below a driven disc tray (49) in the rotary table rotating mechanism (28);

preparatory end positioning mechanism: a preparatory positioning cylinder (33) is arranged on the stand (3) corresponding to the preparatory turntable mechanism, a positioning plug (60) is arranged at the top end of a piston rod (59) of the preparatory positioning cylinder (33), and the positioning plug (60) corresponds to a groove on the bottom surface of the rotating motor (53).