CN218017027U - Automatic production line for drilling holes and chamfering of bolts - Google Patents

Abstract

The utility model discloses a bolt drilling hole and chamfer automatic production line, relate to electric power, railway equipment, mechanical engineering's bolt processing technology field, including the charging box, hoist mechanism, work piece tilting mechanism, work piece closing device and drilling chamfer device, work piece tilting mechanism includes first transfer pipeline, second transfer pipeline, push away a pump and connecting piece board, the connecting piece board is provided with the connecting piece groove that is used for accepting the bolt, work piece closing device includes work piece transport mechanism, work piece transport mechanism is including sending a board, fixed connecting rod, first rotatory connecting rod and the rotatory connecting rod of second, the one end of first rotatory connecting rod, the one end difference swing joint of the rotatory connecting rod of second both ends just can carry out the circumference rotation around swing joint department about fixed connecting rod, the other end of first rotatory connecting rod, the other end of the rotatory connecting rod of second respectively with send a board fixed connection. The utility model discloses can carry out automatic feeding, processing and unloading to the bolt, improve machining efficiency.

Description

Automatic production line for drilling holes and chamfering of bolts

Technical Field

The utility model relates to an electric power, railway equipment, mechanical engineering's bolt processing technology field specifically are a bolt bores pinhole and chamfer automatic production line.

Background

In the power industry and many industries, a large number of bolts are used, and nuts can slowly withdraw after long-term operation and vibration, so that pin holes need to be drilled in bolts of various types, burrs are generated after drilling, and chamfering is needed; because the processing volume is huge, need process thousands of sets every day, workman's operation is tired easily and is easy to take place the accident, designs a full-automatic processing line based on this, has greatly improved production efficiency, has saved the cost of labor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a bolt drilling hole and chamfer automatic production line, this production line need not program, has adjusted the time interval when the debugging, and the position clearance of product only needs put into the workbin automatic processing come out with machined part (unprocessed bolt) exactly finished, and the workman only needs to transport the machined part once, and a workman can watch many automatic production lines in addition, greatly improves production efficiency, alleviates workman's intensity of labour.

The purpose of the utility model is realized through the following technical scheme: bolt drilling hole and chamfer automatic production line, automatic production line includes charging box, hoist mechanism, work piece tilting mechanism, work piece closing device and drilling chamfer device, the charging box passes through chain conveyor with work piece tilting mechanism and is connected, work piece tilting mechanism is including passing a pipeline, push away a pump and connecting piece board, it includes first pipeline and second pipeline to pass a pipeline, the connecting piece board is provided with the connecting piece groove that is used for accepting the bolt, first pipeline sets up the top at the connecting piece board, the second pipeline sets up the right side at the connecting piece board, the import of first pipeline is relative with chain conveyor, and the bolt on the chain conveyor of being convenient for gets into first pipeline, the export of first pipeline is relative with the connecting piece groove on the connecting piece board, and the bolt of being convenient for drops local card from first pipeline and goes into in the connecting piece groove, push away a pump setting in the top that connects a groove, push away a pump, connect the center of a pipeline all to be located same straight line for push away a pump and can pass the import that the bolt accurately falls into the second pipeline.

Further, work piece closing device sets up in work piece tilting mechanism's below, work piece closing device is including putting a support, baffle, work piece transport mechanism and hold-down mechanism, work piece transport mechanism is including sending a board, fixed connecting rod and rotatory connecting rod, rotatory connecting rod includes first rotatory connecting rod and second rotatory connecting rod, the one end of first rotatory connecting rod, the one end of second rotatory connecting rod swing joint respectively about fixed connecting rod both ends and can carry out the circumference around swing joint and rotate, the other end of first rotatory connecting rod, the other end of second rotatory connecting rod respectively with send a board fixed connection, send a board, fixed connecting rod, first rotatory connecting rod and second rotatory connecting rod to be the parallelogram shape after connecting, put a support, send a board all to be provided with the several and be used for placing the groove of bolt, be convenient for work piece transport mechanism drives the bolt and gets into next groove when carrying out the circumference rotary motion.

Furthermore, a feeding port is arranged at the top of the charging box, two first feeding steps and two second feeding steps with gradually increased heights are arranged in the charging box at intervals from left to right, the lifting mechanism is arranged below the charging box and comprises a lifting plate, a speed reducer and a base, three first plates, two second plates and three third plates with gradually increased heights are arranged in the lifting plate at intervals from left to right, the first plates, the second plates and the third plates penetrate into the charging box, the first plates and the second plates are respectively arranged at the left side and the right side of the first feeding steps, the second plates and the third plates are respectively arranged at the left side and the right side of the second feeding steps, the lifting plate is opposite to the feeding port, the third plates penetrate through the feeding port, bolts can conveniently fall onto a chain conveyor belt, and the lifting plate is fixedly connected with the base through a lifting plate guide pillar, the speed reducer is arranged on the base and connected with the lifting plate, the charging box is fixedly connected with the base through the upright post, the charging box is arranged in a downward inclined mode, the height of the charging box at the position of the lifting plate is lower than that of the charging box at the position of the upright post, the speed reducer comprises a speed reduction box and a first motor, the speed reduction box is connected with the first motor, the speed reduction box is provided with a first connecting rod, the first connecting rod is connected with a second connecting rod through a first connecting hinge, the bottom of the lifting plate is connected with the second connecting rod through a second connecting hinge, the first motor starts to rotate, the first connecting rod starts to perform circular motion, the first connecting rod drives the second connecting rod, the second connecting rod drives the lifting plate to perform vertical reciprocating motion, the first plate, the second plate and the third plate perform vertical reciprocating motion, and after bolts are placed in the charging box, can roll to first board department along inclination, when first board moves down to the height with the charging box bottom when leveling, the bolt rolls to first board on, first board begins to move up to the height with first material loading rank when leveling, the bolt rolls from first board on to first material loading rank, the second board moves down to the height with first material loading rank when leveling, the bolt rolls from first material loading rank on to the second board, analogizes to this, until the bolt rolls from the material loading mouth and falls on the chain conveyer belt.

Furthermore, the chain conveyor belt and the workpiece conveying mechanism are provided with speed reducing motors, so that the speed can be controlled conveniently.

Preferably, the bolt comprises a nut and a screw, the width of the joint groove is smaller than that of the nut, the width of the joint groove is not smaller than the diameter of the screw, when the screw end faces downwards, the screw is inserted into the joint groove, the pushing pump pushes the bolt to enable the bolt to overturn the nut end and fall downwards into the second transmission pipeline, when the nut end faces downwards, the nut is larger than the width of the joint groove to enable the nut to be located on the top plane of the joint plate, at the moment, the pushing pump pushes the bolt to enable the bolt translation nut end to fall downwards into the second transmission pipeline, and the nut of the bolt faces the same direction.

Furthermore, the pressing mechanism comprises a pressing device and a pressing pump, the pressing device is opposite to the bottom of the bolt placed in the groove, the baffle is arranged at the head of the bolt, the pressing pump is connected with the pressing device, and the pressing device tightly pushes the bolt towards the direction of the baffle.

Further, drilling chamfer device sets up the top at work piece closing device, drilling chamfer device is including drilling drill bit, chamfer drill bit and second motor, the top of drilling drill bit, chamfer drill bit, second motor is provided with first belt pulley, third belt pulley, second belt pulley respectively, connect through the belt between first belt pulley, second belt pulley and the third belt pulley, first belt pulley, second belt pulley and third belt pulley all are in same horizontal plane, and be convenient for first belt pulley, second belt pulley, third belt pulley rotate together.

Further, drilling chamfer device still includes the support, the support respectively with drilling bit, chamfer drill bit, second motor fixed connection, the support top is provided with the elevator pump, and the elevator pump drives the support and rises or descends to this drives drilling bit and chamfer drill bit and rises or descends.

The utility model has the advantages that:

1. the utility model discloses a width in restriction piece connecting groove lets the nut end of bolt drop down for the orientation of bolt on work piece closing device is unanimous.

2. The utility model discloses a work piece transport mechanism sends the bolt of unprocessed bolt to the position of driling to the bolt of having bored the hole sends the position of carrying out the chamfer, sends the bolt of all accomplishing of drilling chamfer to the unloading position simultaneously and collects.

3. The utility model discloses a hold-down mechanism top bolt avoids the bolt removal, improves the machining precision.

4. The utility model discloses a drilling chamfer device can drilling processing, chamfer processing go on simultaneously, the process time that has significantly reduced improves machining efficiency.

5. The utility model discloses an automated production mode greatly improves operating personnel's safety guarantee, effectively avoids endangering the emergence of personal safety's production accident.

Drawings

FIG. 1 is a flow chart of an automatic production line for drilling pin holes and chamfering bolts according to the present invention;

fig. 2 is a schematic structural diagram of the charging box, the lifting mechanism, the workpiece turnover mechanism, the workpiece pressing device and the drilling chamfering device of the present invention;

FIG. 3 is an elevation view of the loading bin and lift mechanism of the present invention;

FIG. 4 is a left side view of FIG. 3 with the lift plate guide posts removed;

fig. 5 is a schematic structural view of the lifting plate of the present invention;

FIG. 6 is a front view of the workpiece turnover mechanism with the bolt bottom dropped downward;

FIG. 7 is a top view of FIG. 6 with the first transfer member conduit removed;

FIG. 8 is a front view of the workpiece turnover mechanism with the bolt head falling downward;

FIG. 9 is a top view of FIG. 8 with the first transfer member conduit removed;

fig. 10 is a front view of the workpiece pressing device of the present invention;

FIG. 11 is a top view of FIG. 10;

fig. 12 is a schematic structural view of the workpiece conveying mechanism of the present invention;

fig. 13 is a front view of the drilling chamfering apparatus of the present invention;

FIG. 14 is a left side view of FIG. 13;

in the figure: 1-charging box, 2-lifting mechanism, 3-workpiece turnover mechanism, 4-workpiece pressing device, 5-drilling chamfering device, 6-base, 7-speed reducer, 8-lifting plate guide column, 9-speed reducer, 10-first motor, 11-first connecting rod, 12-second connecting rod, 13-first connecting hinge, 14-second connecting hinge, 15-chain conveyor belt, 16-first plate, 17-first conveying pipeline, 18-second conveying pipeline, 19-pushing pump, 20-connecting plate, 21-connecting groove, 22-bolt, 23-workpiece conveying mechanism, 24-discharging support, 25-first feeding step, 26-conveying plate, 27-fixed connecting rod, 28-first rotating connecting rod, 29-second rotating connecting rod, 30-baffle, 31-presser, 32-pressing pump, 33-pressing mechanism, 34-groove, 35-drilling bit, 36-chamfering bit, 37-second motor, 38-first belt pulley, 39-second belt pulley, 39-third belt pulley, 40-pressing device, 43-second belt pulley, 44-third belt pulley, 42-second belt pulley, and 45-second belt pulley.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 14, the automatic production line for bolt pin hole drilling and chamfering comprises a charging box 1, a lifting mechanism 2, a workpiece turnover mechanism 3, a workpiece pressing device 4 and a drilling and chamfering device 5, wherein the charging box 1 is connected with the workpiece turnover mechanism 3 through a chain conveyor 15, the workpiece turnover mechanism 3 comprises a transmission pipeline, a pushing pump 19 and a connecting plate 20, the transmission pipeline comprises a first transmission pipeline 17 and a second transmission pipeline 18, the connecting plate 20 is provided with a connecting groove 21 for receiving a bolt 22, the first transmission pipeline 17 is arranged above the connecting plate 20, the second transmission pipeline 18 is arranged on the right side of the connecting plate 20, an inlet of the first transmission pipeline 17 is opposite to the chain conveyor 15, an outlet of the first transmission pipeline 17 is opposite to the connecting groove 21 on the connecting plate 20, the pushing pump 19 is arranged above the connecting groove 21, and centers of the pushing pump 19, the connecting plate 20 and the second transmission pipeline 18 are all on the same straight line. Firstly, a worker puts a bolt 22 to be processed into a charging box 1, the bolt 22 to be processed is conveyed to a chain conveyor 15 from bottom to top through a lifting mechanism 2, then the bolt is conveyed to a workpiece turnover mechanism 3 through the chain conveyor 15, the bolt 22 falling down along a first workpiece conveying pipeline 17 is partially clamped into a workpiece receiving groove 21, and the bolt 22 is turned over to enter a second workpiece conveying pipeline 18 under the pushing of a workpiece pushing pump 19.

As shown in fig. 10 to 12, the workpiece pressing device 4 is disposed below the workpiece turning mechanism 3, the workpiece pressing device 4 includes a workpiece placing support 24, a baffle 30, a workpiece conveying mechanism 23 and a pressing mechanism 33, the workpiece conveying mechanism 23 includes a workpiece feeding plate 26, a fixed connecting rod 27 and a rotating connecting rod, the rotating connecting rod includes a first rotating connecting rod 28 and a second rotating connecting rod 29, one end of the first rotating connecting rod 28 and one end of the second rotating connecting rod 29 are respectively movably connected to the left and right ends of the fixed connecting rod 27 and can rotate circumferentially around the movable connection, the other end of the first rotating connecting rod 28 and the other end of the second rotating connecting rod 29 are respectively fixedly connected to the workpiece feeding plate 26, and the workpiece placing support 24 and the workpiece feeding plate 26 are both provided with a plurality of grooves 34 for placing the bolts 22. The bolts 22 fall from the second conveying pipeline 18 and roll down along the slope arranged on the left side of the part placing support 24, the part conveying plate 26, the fixed connecting rod 27 and the rotating connecting rods are connected into a parallelogram, the second rotating connecting rod 29 starts to do circular motion and simultaneously drives the part conveying plate 26, the part conveying plate 26 drives the first rotating connecting rod 28 to do circular motion together, the grooves 34 on the part conveying plate 26 accurately support the bolts 22 rolling down at the bottom of the slope, the bolts 22 are conveyed to the grooves 34 of the part placing support 24 along the circular motion path and then continue to do circular motion, the bolts 22 start to be machined, the machined bolts 22 are taken away by the grooves 34 on the part conveying plate 26 which does circular motion for the second time and are conveyed to the top of the slope arranged on the right side of the part placing support 24, and the machined bolts 22 roll down along the slope for collection.

As shown in fig. 2 to 5, a feeding port is arranged at the top of the charging box 1, two first feeding steps 25 and two second feeding steps 43 with gradually increasing heights are arranged in the charging box 1 at intervals from left to right, the lifting mechanism 2 is arranged below the charging box 1, the lifting mechanism 2 comprises a lifting plate, a speed reducer 7 and a base 6, three first plates 16, second plates 44 and third plates 45 with gradually increasing heights are arranged in the lifting plate at intervals from left to right, the first plates 16, the second plates 44 and the third plates 45 penetrate through the charging box 1, the first plates 16 and the second plates 44 are respectively arranged at the left and right sides of the first feeding steps 25, the second plates 44 and the third plates 45 are respectively arranged at the left and right sides of the second feeding steps 43, the lifting plate is opposite to the feeding port, the third plates 45 penetrate through the feeding port, the lifting plate is fixedly connected with the base 6 through a lifting guide post 8, the lifting post 7 is arranged on the base 6 and connected with the lifting plate, the lifting plate 1 is connected with the base 6 through a connecting rod 14, the connecting rod 12 is connected with the lifting plate 1, the motor 12 is connected with the lifting plate 1, the connecting rod 9, the connecting rod 14 is connected with the motor, the motor 12, the lifting plate and the connecting rod 9, the connecting rod 12 is connected with the motor, the motor 11, the connecting rod 9 is connected with the motor 11, and the connecting rod 9, the connecting rod 13, and the connecting rod 12, the connecting rod 9. Firstly, a worker puts a bolt 22 to be processed into the charging box 1, the bolt 22 rolls to the position of the first plate 16 along the inclination angle of the charging box 1, the first motor 10 is started, the first motor 10 is decelerated by the reduction gearbox 9, the first connecting rod 11 starts to move circularly and drives the second connecting rod 12 to move together, the lifting plate reciprocates up and down under the action of the lifting plate guide post 8 (namely, the first connecting rod 11 moves circularly once and the lifting plate moves up and down once), when the first plate 16 rolls to be flush with the bottom of the charging box 1, the bolt 22 rolls to the first plate 16, the first plate 16 starts to move up to be flush with the height of the first feeding step 25, the bolt 22 rolls to the first feeding step 25 from the first plate 16, the second plate 44 moves down to be flush with the height of the first feeding step 25, the bolt 22 rolls to the second plate 44 from the first feeding step 25, the second plate 44 starts to move up to be flush with the height of the second feeding step 43, the bolt 22 rolls to be flush with the height of the second feeding step 43, the second plate 44, the bolt rolls to be flush with the height of the second feeding roller 45, and the third plate 22 from the feeding hole 43, the upper conveyor belt, the upper of the bolt 22 and the third plate rolls to the upper plate 45, and the upper plate 45, the upper conveyor belt 45, the upper plate 45 of the upper conveyor belt 45, and the bolt 22, and the third plate 45, the upper plate 15.

The chain conveyor 15 and the workpiece conveying mechanism 23 are provided with speed reduction motors. The bolt 22 to be processed slides onto the chain conveyor belt 15 from the feeding port, the speed reduction motor drives the chain wheels of the chain conveyor belt 15 to rotate clockwise, the chain of the chain conveyor belt 15 moves in parallel under the action of the two chain wheels (a driving wheel and a driven wheel), and the bolt 22 to be processed is conveyed into the first transmission pipeline 17. The rotation of the speed reducing motor drives the second rotary connecting rod 29 to make circular motion.

As shown in fig. 6 to 9, the bolt 22 includes a nut and a screw, the width of the joint groove 21 is smaller than the width of the nut, and the width of the joint groove 21 is not smaller than the diameter of the screw. The work inverting mechanism 3 makes the direction of the bolt 22 to be machined uniform (i.e., the head of the bolt 22 is uniformly directed downward), which is achieved by the joint groove 21 and the stripper pump 19. The head orientation of the bolts 22 to be machined during the transfer is random, while the subsequent process requires the head orientation of the bolts 22 to be uniform, and there are two cases of the bolts 22 falling down the first transfer pipe 17: one is that the bottom (i.e. the screw end) of the bolt 22 faces downward, the screw directly snaps into the joint groove 21, and under the pushing action of the pusher pump 19, the bolt 22 is turned over to cause the head (i.e. the nut end) of the bolt 22 to face downward into the second transmission pipe 18; the other is that the nut end of the bolt 22 faces downwards, the nut is larger than the connector groove 21, the nut is arranged on the top plane of the connector plate 20, and the bolt 22 translates the nut end downwards into the second transmission pipeline 18 under the pushing of the pushing piece pump 19.

As shown in fig. 10 to 11, the pressing mechanism 33 includes a pressing device 31 and a pressing pump 32, the pressing device 31 is opposed to the bottom of the bolt 22 placed in the groove 34, the stopper 30 is provided at the head position of the bolt 22, and the pressing pump 32 is connected to the pressing device 31. The hold-down pump 32 starts to work, so that the hold-down device 31 abuts against the screw of the bolt 22 to hold down the nut of the bolt 22 in the direction of the baffle 30, the bolt 22 is ensured not to move during processing, the hold-down pump 32 resets after processing is completed, and the hold-down device 31 does not abut against the bolt 22 any more.

As shown in fig. 13 to 14, the drilling and chamfering device 5 is disposed above the workpiece pressing device 4, the drilling and chamfering device 5 includes a drilling bit 35, a chamfering bit 36 and a second motor 37, the top of the drilling bit 35, the top of the chamfering bit 36 and the top of the second motor 37 are respectively provided with a first belt pulley 38, a third belt pulley 40 and a second belt pulley 39, the first belt pulley 38, the second belt pulley 39 and the third belt pulley 40 are connected through a belt, the first belt pulley 38, the second belt pulley 39 and the third belt pulley 40 are all located on the same horizontal plane, the drilling and chamfering device 5 further includes a support 41, the support 41 is respectively fixedly connected with the drilling bit 35, the chamfering bit 36 and the second motor 37, and the top of the support 41 is provided with a lift pump 42. The drilling chamfering device 5 can simultaneously perform drilling and chamfering operations, the second motor 37 starts to rotate and drives the second belt pulley 39 to rotate, the second belt pulley 39 drives the first belt pulley 38 and the third belt pulley 40 to rotate together through a belt, the first belt pulley 38 and the third belt pulley 40 respectively drive the drilling drill 35 and the chamfering drill 36 to rotate, the drilling drill 35 and the chamfering drill 36 are pressed down to the position of the bolt 22 to be processed under the action of the lifting pump 42, the lifting pump 42 is reset after the processing is completed, the drilling drill 35 and the chamfering drill 36 are driven to ascend, the workpiece conveying mechanism 23 conveys the bolt 22 with the drilled hole to a chamfering station each time, meanwhile, the unprocessed bolt 22 is conveyed to a drilling station, and the operation is repeated to achieve the purpose of continuous processing.

The automatic production line feeding and pressing mechanism 33 is used for pressing, drilling, chamfering and discharging, 8 seconds are needed for completing one cycle, namely 8 seconds are needed for each piece, one piece of drilling is manually completed for 8-10 seconds, one piece of chamfering is completed for 6-8 seconds, bolts which are completely finished in one drilling and chamfering are produced in 16 seconds on average, and the time for manually carrying, pressing and collecting the bolts is not calculated. Production efficiency of automatic production line is improved more than one time than manual production efficiency, if one person operates two or even three machines, efficiency can increase at double, and simultaneously, manual operation needs manual work to master work piece (profiling), the drilling of manual operation drilling machine, machining precision is IT10 ~ IT13, roughness is Ra12.5 ~ Ra25um, automatic production line's device uniform motion, the steady quality, machining precision is IT9 ~ IT10, roughness is Ra3.2 ~ Ra6.3um, automatic production line can guarantee higher machining precision.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (9)

1. The utility model provides a bolt drilling hole and chamfer automatic production line which characterized in that: the device comprises a charging box (1), a lifting mechanism (2), a workpiece turnover mechanism (3), a workpiece pressing device (4) and a drilling chamfering device (5), wherein the charging box (1) is connected with the workpiece turnover mechanism (3) through a chain conveyor belt (15), the workpiece turnover mechanism (3) comprises a transmission pipeline, a pushing pump (19) and a connecting piece plate (20), the transmission pipeline comprises a first transmission pipeline (17) and a second transmission pipeline (18), the connecting piece plate (20) is provided with a connecting piece groove (21) for receiving a bolt (22), the first transmission pipeline (17) is arranged above the connecting piece plate (20), the second transmission pipeline (18) is arranged on the right side of the connecting piece plate (20), an inlet of the first transmission pipeline (17) is opposite to the chain conveyor belt (15), an outlet of the first transmission pipeline (17) is opposite to the connecting piece groove (21) on the connecting piece plate (20), the pushing pump (19) is arranged above the connecting piece groove (21), and the pushing pump (19), the connecting piece pipe (20) and the second transmission pipeline (18) are all positioned on the same straight line;

workpiece pressing device (4) sets up in the below of work piece tilting mechanism (3), work piece pressing device (4) is including putting a support (24), baffle (30), work piece transport mechanism (23) and hold-down mechanism (33), work piece transport mechanism (23) is including sending a board (26), fixed connecting rod (27) and rotating connecting rod, rotating connecting rod includes first rotating connecting rod (28) and second rotating connecting rod (29), the one end of first rotating connecting rod (28), the one end of second rotating connecting rod (29) swing joint respectively about fixed connecting rod (27) both ends and can carry out the circumference rotation around swing joint, the other end of first rotating connecting rod (28), the other end of second rotating connecting rod (29) respectively with send a board (26) fixed connection, it all is provided with groove (34) that are used for placing bolt (22) to put a support (24), send a board (26).

2. The automatic bolt pin hole drilling and chamfering production line according to claim 1, characterized in that: the top of the charging box (1) is provided with a feeding port, two first feeding steps (25) and two second feeding steps (43) with gradually increased heights are arranged in the charging box (1) from left to right at intervals, the lifting mechanism (2) is arranged below the charging box (1), the lifting mechanism (2) comprises a lifting plate, a speed reducer (7) and a base (6), three first plates (16), two second plates (44) and three third plates (45) with gradually increased heights are arranged in the lifting plate from left to right at intervals, the first plates (16), the second plates (44) and the third plates (45) penetrate into the charging box (1), the first plate (16) and the second plate (44) are respectively arranged at the left side and the right side of the first feeding step (25), the second plate (44) and the third plate (45) are respectively arranged at the left side and the right side of the second feeding step (43), the lifting plate is opposite to the feeding port, the third plate (45) penetrates through the feeding port, the lifting plate is fixedly connected with the base (6) through a lifting plate guide post (8), the speed reducer (7) is arranged on the base (6) and connected with the lifting plate, the charging boxes (1) are fixedly connected with the base (6) through an upright post, the charging boxes (1) are obliquely arranged downwards, and the height of the charging box (1) at the position of the lifting plate is lower than that of the charging box(s) (at the position of the upright post(s) 1) Of (c) is measured.

3. The automatic bolt pin hole drilling and chamfering production line according to claim 2, characterized in that: the speed reducer (7) comprises a speed reduction box (9) and a first motor (10), the speed reduction box (9) is connected with the first motor (10), the speed reduction box (9) is provided with a first connecting rod (11), the first connecting rod (11) is connected with a second connecting rod (12) through a first connecting hinge (13), and the bottom of the lifting plate is connected with the second connecting rod (12) through a second connecting hinge (14).

4. The automatic bolt pin hole drilling and chamfering production line according to claim 1, characterized in that: and the chain conveyor belt (15) and the workpiece conveying mechanism (23) are both provided with speed reducing motors.

5. The automatic bolt pin hole drilling and chamfering production line according to claim 1, characterized in that: the bolt (22) comprises a nut and a screw, the width of the joint groove (21) is smaller than that of the nut, and the width of the joint groove (21) is not smaller than the diameter of the screw.

6. The automatic bolt pin hole drilling and chamfering production line according to claim 1, characterized in that: the pressing mechanism (33) comprises a pressing device (31) and a pressing pump (32), the pressing device (31) is opposite to the bottom of the bolt (22) placed in the groove (34), the baffle (30) is arranged at the head position of the bolt (22), and the pressing pump (32) is connected with the pressing device (31).

7. The automatic bolt pin hole drilling and chamfering production line according to claim 1, characterized in that: drilling chamfer device (5) set up the top at work piece closing device (4), drilling chamfer device (5) are including drilling bit (35), chamfer drill bit (36) and second motor (37), the top of drilling bit (35), chamfer drill bit (36), second motor (37) is provided with first belt pulley (38), third belt pulley (40), second belt pulley (39) respectively, connect through the belt between first belt pulley (38), second belt pulley (39) and third belt pulley (40).

8. The automatic bolt pin hole drilling and chamfering production line according to claim 7, characterized in that: the first belt pulley (38), the second belt pulley (39) and the third belt pulley (40) are all located on the same horizontal plane.

9. The automatic bolt pin hole drilling and chamfering production line according to claim 7 or 8, characterized in that: the drilling chamfering device (5) further comprises a support (41), the support (41) is fixedly connected with the drilling drill bit (35), the chamfering drill bit (36) and the second motor (37) respectively, and a lifting pump (42) is arranged at the top of the support (41).

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