CN110576294B

CN110576294B - Production process of automobile hub fastening assembly

Info

Publication number: CN110576294B
Application number: CN201910939343.7A
Authority: CN
Inventors: 沙巍炜; 陈士林; 周星辰; 沈德友; 蒋晨
Original assignee: Jiangyin Letian Fastener Co ltd
Current assignee: Jiangyin Letian Fastener Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-11-30
Anticipated expiration: 2039-09-30
Also published as: CN110576294A

Abstract

The invention relates to a production process of an automobile hub fastening assembly, which improves the production flow and the production process, improves the quality of a finished fastening assembly and improves the production efficiency. Sawing the cylindrical blank by a sawing device in the production equipment to cut the cylindrical blank into studs with consistent lengths; the cold heading device is used for upsetting the stud to form a nut at the end part of the stud; the thread rolling device rolls threads on the stud to form a bolt; the combined assembling mechanism automatically assembles the bolt, the bushing and the gasket together. The invention relates to a production process of an automobile hub fastening assembly, which enables the lengths of sawn bolts to be consistent, can accurately lubricate an upsetting mechanism, does not influence the normal operation of the upsetting mechanism, can recycle lubricating oil, improves the thread rolling quality and efficiency of the bolts, can collect the bolts in order after thread rolling is finished, facilitates manual material taking, saves labor, and improves the working efficiency and the finished product quality.

Description

Production process of automobile hub fastening assembly

Technical Field

The invention relates to a production process of an automobile hub fastening assembly.

Background

The automobile hub fastening assembly is mainly manufactured by assembling and welding cold-rolled steel plate stamping parts with good stamping and welding manufacturability, the welding production batch is large, the production speed is high, the requirements on the assembly and welding precision of welded parts are high, a production mode of flow production is mostly adopted, the mechanization and automation degree is high, and a welding bolt is used as one of main parts of assembly, so that the manufacturing quantity is huge.

Before manufacturing, the fastening component firstly needs to cut a cylindrical blank into short cylinders, put the short cylinders into a chamfering machine for chamfering, then carries out cold heading on the short cylinders, then carries out thread rolling on the cylindrical blank subjected to cold heading by a thread rolling device, carries out heat treatment and surface treatment, and finally sleeves the bolts subjected to thread rolling on a lining and a gasket to form a fastening piece.

However, the original process of the conventional automobile hub fastening assembly is backward, so that a product with higher quality cannot be obtained, and the conventional production equipment has a plurality of defects:

the sawing device is not provided with a special feeding mechanism, the material is conveyed to the sawing position by a conveying roller of a conveying track, and then the front clamper and the rear clamper clamp the cylindrical blank for sawing, so that the length of the sawn material is difficult to control, the length of the bolts is not uniform, and the quality of a finished product is influenced; in the working process of the traditional cold heading device, lubricating oil needs to be added to an upsetting mechanism manually, the manual lubricating oil adding is time-consuming and labor-consuming, and is occasionally forgotten, so that the machine is unsmooth in operation; lubricating oil is added to the upsetting mechanism by using equipment, but when the lubricating oil is added to the equipment, the oil filling pipe cannot reach the position needing lubricating at the lower end of the upsetting mechanism, so that the normal operation of the machine is influenced; in addition, after the lubricating oil is added into the machine, part of the lubricating oil drops and a small amount of lubricating oil permeates out of the machine, so that the waste of the lubricating oil is caused; in the conventional bolt thread rolling equipment, bolts move on a material guide rail, and then are pushed into a movable thread rolling plate and a fixed thread rolling plate for extrusion friction through a material pushing device, the bolts on the material guide rail are closely arranged in rows, and due to the fact that no blocking device exists, when the material pushing device pushes, the bolts are easily pushed together, the situation that a plurality of bolts are pushed out simultaneously or the bolts are clamped easily occurs, and therefore thread rolling quality and efficiency of the bolts are affected; in addition, bolts after thread rolling are directly dropped into the material collecting box, a large amount of lubricating oil is arranged on the bolts in the material collecting box, materials need to be frequently taken and cleaned manually, the workload is large, and time and labor are wasted; in the prior art, the assembly work of the bolt sleeving bushing and the gasket needs manual work, the sleeving work amount is very large, a large amount of manpower is consumed, the manual sleeving speed is low, the efficiency is low, the conditions of less sleeving or wrong sleeving are common, and the quality of a finished product is influenced.

Therefore, the production process and the production equipment for the product quality of the automobile hub fastening assembly at present are provided.

Disclosure of Invention

The invention aims to overcome the defects and provide a production process of an automobile hub fastening assembly, which provides product quality.

The purpose of the invention is realized as follows:

a production process of an automobile hub fastening assembly comprises the following specific steps:

1) the automobile hub fastening assembly is made of a solid round blank with the diameter of 38mm, the blank is alloy steel or copper, and the solid round blank is polished and ground to be round;

2) conveying the polished round blank to a sawing device in production equipment, and sawing the round blank by the sawing device;

3) placing the sawn blank into a chamfering machine for chamfering;

4) the chamfered blank is sent to a cold heading device in production equipment for cold heading, and a screw blank formed after the cold heading is finished is sent to a blank collecting box;

5) manually conveying the screw blank in the blank collecting box to a screw rolling device for screw rolling treatment, and rolling threads on the surface of the screw blank;

6) putting the screw into heat treatment equipment for heating treatment, wherein the heating temperature is 850-860 ℃, and keeping the heating temperature for 120-150 minutes;

7) heating the screw, then tempering at 620 ℃, keeping the heating temperature for 240-280 minutes, and then taking out for air cooling;

8) putting the cooled screw into galvanizing equipment for surface galvanizing treatment to remove hydrogen ions on the surface of the screw;

9) and finally, putting the screw subjected to surface treatment into a combined assembly mechanism, assembling the screw, the bushing and the gasket to form a fastening assembly of the automobile hub, and putting the fastening assembly into a finished product collecting box to finish collection.

The production equipment used in the production process sequentially comprises a sawing device, a chamfering machine, a cold heading device, a thread rolling device, a heating furnace, a galvanizing device, a combined assembly mechanism and a finished product collecting box from the front to the back;

the sawing device comprises a cutting mechanism and a feeding mechanism, and the feeding mechanism is arranged behind the cutting mechanism; the cutting mechanism comprises a saw wheel driven by a motor to rotate, a hopper which inclines downwards is arranged on the front side of the saw wheel, and a collecting box is arranged below the hopper; the feeding mechanism comprises a sliding base arranged behind the saw wheel, the sliding base is inserted and sleeved at the front ends of two transversely arranged guide pillars, the sliding base slides forwards and backwards at the front ends of the guide pillars, and the rear ends of the guide pillars are inserted into the fixed base; a trolley is arranged on the sliding base in a sliding manner and moves left and right on the sliding base; the front end and the rear end of the sliding base are provided with limiters;

placing the sawn blank into a chamfering machine for chamfering; the chamfered blank is sent into a cold upsetting device, the cold upsetting device comprises an upsetting mechanism and a lubricating system, the upsetting mechanism comprises an upper die and a lower die, and the lubricating system is arranged between the upper die and the lower die; the upper die is driven by an oil cylinder to do reciprocating linear stamping motion in the left-right direction, a stamping head is arranged on the right side of the upper die, a plurality of bolt holes for placing cylindrical materials are formed in the left side of the lower die, and the cylindrical materials in the bolt holes are stamped by the stamping head; the lubricating system comprises an oil pipe, the oil pipe is arranged between the upper die and the lower die, two ends of the oil pipe are respectively hinged with the support column through bearings, and the oil pipe can rotate relative to the support column; the oil pipe is provided with a plurality of valves, and the valves are connected with oil injection pipes facing the lower die;

the thread rolling device comprises a rotating wheel driven by a motor, the rotating wheel is connected with a movable thread rolling plate through a crank arm, the thread rolling surface side of the movable thread rolling plate is provided with the movable thread rolling plate and a material guide rail, the material guide rail is obliquely arranged and is positioned on the right side of the movable thread rolling plate, and vertical bolts are orderly arranged in the material guide rail; the rear side of the guide rail is provided with a pushing and blocking mechanism, the pushing and blocking mechanism comprises a pushing block and a stop block which are mutually linked, the front end of the pushing block and the front end of the stop block are both positioned below the guide rail, and the rear end of the pushing block and the rear end of the stop block are mutually hinged and linked through a hinge piece; a material collecting box is arranged below the movable thread rolling plate and the movable thread rolling plate, a conveying mechanism is arranged on the left side of the material collecting box, the conveying mechanism comprises a conveyor, a collecting hopper is arranged at the top of the conveyor, and a collecting box is arranged below the collecting hopper;

putting the screws into a heating furnace for heating treatment, putting the cooled screws into galvanizing equipment for surface galvanizing treatment, and finally putting the screws into a combined assembly mechanism, wherein the combined assembly mechanism comprises a rotary table, arc-shaped openings are uniformly distributed in a circle on the circumference of the rotary table, a bolt vibrating disc, a lining vibrating disc and a gasket vibrating disc are respectively arranged on the outer side of the rotary table clockwise, the rotary table is obliquely arranged, the rotary table is high close to the bolt vibrating disc and low close to the gasket vibrating disc, arc-shaped stop blocks are arranged on the outer side of the rotary table close to the three vibrating discs, screw caps of the bolts are erected on the arc-shaped openings and the arc-shaped stop blocks, the arc-shaped stop blocks are consistent with the oblique direction and the oblique angle of the rotary table, and a feeding track of a finished product collecting box extends to the lower part of the tail ends of the arc-shaped stop blocks; the bolt vibration disc is provided with a downward-inclined bolt track connected with the rotary disc, the lining vibration disc is provided with a lining track inclined towards the rotary disc, and the gasket vibration disc is provided with a gasket track inclined towards the rotary disc; the lower end of the lining track is provided with a first track below the turntable along the outer diameter of the turntable, the first track is positioned between the lining track and the gasket track, and the first track is provided with a through hole along the radian direction of the first track; a second rail is arranged at the lower end of the gasket rail below the turntable along the outer diameter of the turntable, the second rail is positioned between the gasket rail and the finished product collecting box, the front end of the second rail extends to the lower part of the first rail, and the second rail is provided with a through hole along the length direction; the tail end of the arc-shaped stop block, the tail end of the second rail and the front end of the feeding rail of the finished product collecting box are aligned.

The sliding base slides back and forth at the front end of the guide pillar through hydraulic drive.

The trolley is pushed by the cylinder to move left and right on the sliding base.

The upper ends of the sliding base and the fixed base are respectively provided with a carrier roller with the length direction vertical to the guide pillar, a cylindrical blank is erected at the upper ends of the two carrier rollers, the front end of the cylindrical blank extends to the side of the saw wheel, and the length direction of the cylindrical blank is consistent with the guide pillar.

The right side of the trolley is provided with an L-shaped baffle, the front end of the cylindrical blank is erected on the baffle, and the side face of the cylindrical blank is abutted against the baffle.

An oil collecting tank is arranged below the oil pipe, and lubricating oil in the oil collecting tank is pumped into the oil pipe by the oil collecting tank.

And a conveying hopper which is inclined downwards is arranged in the material collecting box, and the conveying hopper is communicated with the conveyor.

And a plurality of raised lines vertical to the conveying belt are arranged on the conveying belt in the conveyor.

The front end of the first rail at the blanking position of the lining is provided with a lining baffle, and two lining lugs are arranged at the positions, located on the two sides of the through hole, of the front end of the first rail.

The front end of the second rail at the blanking position of the gasket is provided with a gasket baffle, and the front end of the second rail is provided with two gasket lugs at the positions on two sides of the through hole.

The production process of the automobile hub fastening assembly has the following advantages:

the production process and the production process of the automobile hub fastening assembly are improved, so that the quality of the finished fastening assembly is improved, and the production efficiency is improved.

The sawing device in the production equipment is provided with the sliding base, the sliding base is provided with a trolley for tightly pushing the cylindrical blank, the trolley tightly pushes the cylindrical blank, the sliding base drives the cylindrical blank to move forwards to the side of the saw wheel for sawing, the trolley is loosened, the sliding base retreats, the cylindrical blank is kept still, the trolley continuously pushes, the sliding base continuously pushes the cylindrical blank, the circular reciprocating motion is realized, the limiting devices are arranged in the front and at the back of the sliding base, the distance for pushing the cylindrical blank forwards by the sliding base each time is consistent, the distance for retreating each time is also consistent, the length of the sawn material is consistent, and the sawing precision and the product quality are improved; supporting rollers are arranged at the front end and the rear end of the cylindrical blank to reduce friction force of the cylindrical blank during movement, so that the cylindrical blank is kept static when the sliding base retreats;

the cold heading device in the production equipment is provided with an oil pipe which can rotate relative to an oil pipe bracket, the oil pipe is provided with a plurality of valves, the valves are connected with an oil injection pipe, the oil injection pipe can rotate to a position needing lubrication in the upsetting mechanism, lubricating oil is injected to the position needing lubrication, the lubricating oil is more accurately injected to the required position, and the normal operation of a machine is ensured; manual lubrication is not needed, so that the labor is saved, and the working efficiency is improved; the cold heading device is also provided with an oil collecting tank, so that lubricating oil permeated in the machine is collected and enters the oil pipe again for recycling, and resource waste is avoided;

the thread rolling device in the production equipment is provided with a pushing and blocking mechanism for pushing a first bolt and blocking a bolt behind the first bolt, a pushing block in the pushing and blocking mechanism is linked with a stop block, the stop block retracts when the pushing block pushes, the pushing block retracts when the stop block blocks, the pushing block and the stop block do not interfere with each other and are continuously connected, the pushing and blocking work is ensured to be continuously carried out, the bolts enter a movable thread rolling plate and a fixed thread rolling plate one by one to carry out friction extrusion thread rolling, and the thread rolling quality and efficiency of the bolts are ensured; the rear part of the collecting box is provided with a conveyor for conveying the bolts finished by thread rolling, a conveying belt of the conveyor is also provided with a raised line for preventing the bolts from rolling off, the rear part of the conveyor is provided with a collecting box, the bolts finally slide into the collecting box from a collecting hopper at the top of the conveyor, and the collecting box can store a large number of bolts, so that manual material taking and cleaning are facilitated;

the combined assembly mechanism in the production equipment is provided with an inclined turntable for driving a bolt to rotate, the bolt is blocked by an arc-shaped stop block and then rotates along with the turntable, a lining rolls off from a lining track to a first track, the bolt rotates along with the turntable to the position above the first track, the lower end of a stud of the bolt penetrates through a through hole of the lining and a through hole of the first track, the lower end of the bolt drags the lining to move on the first track, washers are orderly arranged on a washer track, the bolt with the lining inserted and sleeved at the lower end rotates along with the turntable to the position above a second track, the lower end of the stud of the bolt penetrates through the through hole of the washer and the through hole of the second track, the lining slides down from the stud of the bolt to the washer below, the lining is overlapped with the washers, and the bolt drags the lining and the washers to move on the second track; when the bolt rotates to the tail end of the arc-shaped stop block, the bushing and the washer are also positioned at the tail end of the second track, the bolt and the nut are separated from the arc-shaped opening, overlapped with the bushing and the washer, fall onto the feeding track which is flush with the tail end of the second track, continuously move to the post-processing equipment on the feeding track, and enter the material receiving box after being processed by the post-processing equipment. The automatic assembly of the bolt, the bush and the washer is realized, the machine replaces manpower, manpower and working time are saved, working efficiency is improved, meanwhile, manual assembly errors are avoided, and assembly quality is improved.

Drawings

Fig. 1 is a schematic view of production equipment in the production process of the automobile hub fastening assembly of the invention.

Fig. 2 is a schematic structural diagram of the sawing device in fig. 1.

Fig. 3 is a schematic structural diagram of the cutting mechanism in fig. 2.

Fig. 4 is a schematic structural diagram of the feeding mechanism in fig. 2.

Fig. 5 is a schematic structural view of the cold heading device in fig. 1.

Fig. 6 is a schematic structural view of the thread rolling device in fig. 1.

Fig. 7 is a schematic structural diagram of a pushing and stopping mechanism of the thread rolling device.

Fig. 8 is a schematic view of the structure of the collection box and the conveyor of fig. 6.

Fig. 9 is a schematic structural view of the combined assembly mechanism in fig. 1.

Fig. 10 is a front view of the arcuate stop, first rail, second rail, and feed rail in the combination assembly mechanism.

Fig. 11 is a schematic view of the construction of the bushing blocks and the bushing bosses in the combination assembly mechanism.

Fig. 12 is a schematic view of a washer baffle and washer tab configuration in a combination assembly mechanism.

In the figure: sawing device 1, cutting mechanism 1.1, saw wheel 1.2, hopper 1.3, collecting box 1.4, feeding mechanism 1.5, sliding base 1.6, fixed base 1.7, guide pillar 1.8, carrier roller 1.9, trolley 1.10, cylindrical blank 1.11, baffle 1.12, cold heading device 2, upsetting mechanism 2.1, upper die 2.2, stamping head 2.3, lower die 2.4, bolt hole 2.5, lubricating system 2.6, oil pipe 2.7, oil spraying pipe 2.8, valve 2.9, support post 2.10, bearing 2.11, oil collecting box 2.12, thread rolling device 3, movable thread rolling plate 3.1, fixed thread rolling plate 3.2, pushing block mechanism 3.3, pushing block 3.4, stop block 3.5, hinge 3.6, guide rail 3.7, rotating wheel 3.8, collecting box 3.9, conveying hopper 3.10, conveying mechanism 3.11, conveying machine 3.12, conveying block 3.4, vibration disc 4, vibration disc 4, vibration disc 4 disc, vibration disc 4, vibration disc, etc. 3.7, vibration disc, and vibration disc, and vibration disc, and vibration disc, motor, The device comprises a gasket track 4.8, a first track 4.9, a bushing baffle 9.1, a bushing lug 9.2, a second track 4.10, a gasket baffle 10.1, a gasket lug 10.2, an arc-shaped stop 4.11, a feeding track 4.12, a chamfering machine 5, a heating furnace 6, a galvanizing device 7 and a finished product collecting box 8.

Detailed Description

Referring to fig. 1 to 12, the invention relates to a production process of an automobile hub fastening assembly, which comprises the following specific steps:

1) the automobile hub fastening assembly is made of a solid round blank with the diameter of 38mm, the blank is made of alloy steel, copper or other metal materials, and the solid round blank is polished and ground to be round;

2) conveying the polished round blank to a sawing device in production equipment, and sawing the round blank into the length required by the fastener by the sawing device;

3) placing the sawn blank into a chamfering machine for chamfering;

7) heating the screw, then tempering at 620 ℃, keeping the tempering temperature for 240-280 minutes, and then taking out for air cooling;

The production equipment used in the production process sequentially comprises a sawing device 1, a chamfering machine 5, a cold heading device 2, a thread rolling device 3, a heating furnace 6, a galvanizing device 7, a combined assembly mechanism 4 and a finished product collecting box 8 from the front to the back.

The sawing device 1 comprises a cutting mechanism 1.1 and a feeding mechanism 1.5, wherein the feeding mechanism 1.5 is arranged behind the cutting mechanism 1.1 and pushes the cylindrical blank 1.11 into the cutting mechanism 1.1 for cutting.

Cutting mechanism 1.1 includes motor drive rotatory saw wheel 1.2, and the front side of saw wheel 1.2 is provided with the hopper 1.3 of downward sloping, and hopper 1.3 below is provided with collecting box 1.4, and the cylinder material after the cutting is accomplished falls into collecting box 1.4 through hopper 1.3.

The feeding mechanism 1.5 comprises a sliding base 1.6 arranged behind a saw wheel 1.2, the sliding base 1.6 is inserted and sleeved at the front ends of two transversely arranged guide pillars 1.8, the sliding base 1.6 is driven by hydraulic pressure to slide back and forth at the front ends of the guide pillars 1.8, and the rear ends of the guide pillars 1.8 are inserted into a fixed base 1.7; the upper ends of the sliding base 1.6 and the fixed base 1.7 are respectively provided with a carrier roller 1.9 with the length direction vertical to the guide pillar 1.8, a cylindrical blank 1.11 is erected at the upper ends of the two carrier rollers 1.9, the carrier roller 1.9 is used for reducing the friction force of the cylindrical blank 1.11 during sliding, the length direction of the cylindrical blank 1.11 is consistent with that of the guide pillar 1.8, and the front end of the cylindrical blank 1.11 extends to the side of the saw wheel 1.2; a trolley 1.10 is arranged on the sliding base 1.6 in a sliding mode, the trolley 1.10 is pushed to move left and right on the sliding base 1.6 through an air cylinder, an L-shaped baffle 1.12 is arranged on the right side of the trolley 1.10, the front end of a cylindrical blank 1.11 is erected on the baffle 1.12, and the side face of the cylindrical blank 1.11 abuts against the baffle 1.12; the front end and the rear end of the sliding base 1.6 are provided with limiters which are used for controlling the sliding distance of the sliding base 1.6 in the front and the rear directions, so that the distance of pushing the cylindrical blank 1.11 forwards by the sliding base 1.6 at each time is consistent, the distance of retreating at each time is also consistent, the length of the sawn material is consistent, and the precision is improved.

The working principle of the sawing device is as follows: firstly, an air cylinder pushes a trolley 1.10 to slide rightwards to a baffle 1.12 and pushes the front end of a cylindrical blank 1.11 tightly against the baffle 1.12, then a sliding base 1.6 moves forwards on a guide pillar 1.8 through hydraulic drive to drive the trolley 1.10, the baffle 1.12 and the front end of the cylindrical blank 1.11 to move forwards and slide to the side of a saw wheel 1.2 for cutting, after the cutting is finished, the trolley 1.10 moves leftwards to loosen the cylindrical blank 1.11, the sliding base 1.6 moves backwards on the guide pillar 1.8, the cylindrical blank 1.11 keeps still due to the action of a carrier roller 1.8, then the trolley 1.10 continues to move rightwards to push the cylindrical blank 1.11 tightly, the sliding base 1.6 drives the cylindrical blank 1.11 to move forwards for cutting, the sliding base 1.6 pushes the cylindrical blank 1.11 forwards at each time in consistent distance due to the action of a front stopper and a rear stopper of the sliding base 1.6, and the distance of the cylindrical blank pushed back at each time is also consistent, so that the length of the sawn material is consistent; thereby cyclically reciprocating.

Placing the sawn blank into a chamfering machine 5 for chamfering; the chamfered blank is sent into a cold heading device 2, the cold heading device 2 comprises an upsetting mechanism 2.1 and a lubricating system 2.6, the upsetting mechanism 2.1 comprises an upper die 2.2 and a lower die 2.4, and the lubricating system 2.6 is arranged between the upper die 2.2 and the lower die 2.4 and used for lubricating the lower die 2.4.

Go up mould 2.2 and do the reciprocal linear punching motion of left and right sides direction by the hydro-cylinder drive, the right side of going up mould 2.2 is provided with stamping head 2.3, a plurality of bolt holes 2.5 that are used for placing the cylinder material are seted up in lower mould 2.4's left side, and stamping head 2.3 carries out the punching press to the cylinder material in the bolt hole 2.5.

The lubricating system 2.6 comprises an oil pipe 2.7, the oil pipe 2.7 is arranged between the upper die 2.2 and the lower die 2.4, two ends of the oil pipe 2.7 are respectively hinged with the support column 2.10 through bearings 2.11, and the oil pipe 2.7 can rotate relative to the support column 2.10; the oil pipe 2.7 is provided with a plurality of valves 2.9, the valves 2.9 are connected with oil spraying pipes 2.8 facing the lower die 2.4, and the valves 2.9 control the oil spraying pipes 2.8 to spray lubricating oil to the lower die 2.4.

An oil collecting tank 2.12 is arranged below the oil pipe 2.7, the oil collecting tank 2.12 is used for collecting lubricating oil which is dripped from the upper die 2.2 and the lower die 2.4, and the oil collecting tank 2.12 continuously leads the lubricating oil in the oil collecting tank into the oil pipe 2.7 for use through a pump, so that the oil is recycled and the resources are saved.

The thread rolling device 3 comprises a rotating wheel 3.8 driven by a motor, the rotating wheel 3.8 is connected with a movable thread rolling plate 3.1 through a crank arm, after the rotating wheel 3.8 rotates, the crank arm drives the movable thread rolling plate 3.1 to do reciprocating linear motion through transmission, a fixed thread rolling plate 3.2 and a material guide rail 3.7 are arranged on the thread rolling surface side of the movable thread rolling plate 3.1, the material guide rail 3.7 is obliquely arranged and is positioned on the right side of the fixed thread rolling plate 3.2, and vertical studs are orderly arranged in the material guide rail 3.7; a pushing and blocking mechanism 3.3 is arranged on the rear side of the material guide rail 3.7, the pushing and blocking mechanism 3.3 is used for pushing a leftmost stud between the movable thread rolling plate 3.1 and the fixed thread rolling plate 3.2 to extrude and blocking the stud behind, the pushing and blocking mechanism 3.3 comprises a pushing block 3.4 and a stop block 3.5 which are linked with each other, the front end of the pushing block 3.4 and the front end of the stop block 3.5 are both positioned below the material guide rail 3.7, the rear end of the pushing block 3.4 and the rear end of the stop block 3.5 are hinged and linked with each other through a hinge element 3.6, when the pushing block 3.4 extends out to push the stud to move, the stop block 3.5 retracts backwards, otherwise, when the stop block 3.5 extends forwards to block the stud left on the right side, the pushing block 3.4 retracts backwards, and the pushing and blocking operations are not influenced by each other and are continuously performed; a material collecting box 3.9 is arranged below the movable thread rolling plate 3.1 and the fixed thread rolling plate 3.2, and a downward inclined conveying hopper 3.10 is arranged in the material collecting box 3.9.

A conveying mechanism 3.11 is arranged on the left side of the collecting box 3.9, the conveying mechanism 3.11 comprises a conveyor 3.12, a conveying hopper 3.10 in the collecting box 3.9 is communicated with the conveyor 3.12, the studs subjected to thread rolling slide into the conveyor 3.12 from the conveying hopper 3.10, a plurality of convex strips 3.15 vertical to the conveying belt are arranged on the conveying belt of the conveyor 3.12, and the convex strips 3.15 are used for preventing the studs from rolling off; the top of the conveyor 3.12 is provided with a collecting hopper 3.13, a collecting box 3.14 is arranged below the collecting hopper 3.13, and the conveying belt of the conveyor 3.12 conveys the screw rods finished by thread rolling to the collecting hopper 3.13 at the top of the conveyor and then falls into the collecting box 3.14 from the collecting hopper 3.13.

The working principle of the thread rolling device is as follows: the studs are transmitted on the material guide rail 3.7, the motor drives the rotating wheel 3.8 to rotate, the transmission of a crank arm connected with the rotating wheel 3.8 drives the movable thread rolling plate 3.1 to do reciprocating linear motion, the pushing block 3.4 in the pushing and blocking mechanism 3.3 pushes one stud positioned at the leftmost side to enter the movable thread rolling plate 3.1 and the fixed thread rolling plate 3.2 for extrusion, the pushing block 3.4 retracts after pushing is finished, meanwhile, the stop block 3.5 linked with the pushing block extends forwards to block the rest of the studs, and after the first stud finishes thread rolling, the pushing block 3.4 continues to push and reciprocates in a circulating mode; the screw rods after the screw rolling fall into the collecting box 3.9 and fall into the conveyor 3.12 through the conveying hopper 3.10 in the collecting box 3.9, the conveying belt of the conveyor 3.12 conveys the screws to the collecting hopper 3.13 at the top of the conveyor, and finally the screw rods fall into the collecting box 3.14 from the collecting hopper 3.13.

And putting the screw into a heating furnace 6 for heating treatment, putting the cooled screw into a galvanizing device 7 for surface galvanizing treatment, removing hydrogen ions on the surface of the screw, and finally putting the screw into the combined assembly mechanism 4.

The combined assembly mechanism 4 comprises a rotary table 4.1, arc-shaped openings 4.2 are uniformly distributed in one circle on the circumference of the rotary table 4.1, and the size of each arc-shaped opening 4.2 is smaller than that of each bolt and each nut.

A bolt vibration disc 4.3, a lining vibration disc 4.4 and a gasket vibration disc 4.5 are respectively arranged on the outer side of the rotary disc 4.1 in the clockwise direction, a downward inclined bolt rail 4.6 is arranged on the bolt vibration disc 4.3 and connected with the rotary disc 4.1, a lining rail 4.7 inclined towards the rotary disc 4.1 is arranged on the lining vibration disc 4.4, and a gasket rail 4.8 inclined towards the rotary disc 4.1 is arranged on the gasket vibration disc 4.5; the rotary table 4.1 is obliquely arranged, the rotary table 4.1 is high at a position close to the bolt vibrating disc 4.3 and low at a position close to the gasket vibrating disc 4.5, the rotary table 4.1 is provided with an arc-shaped stop block 4.11 at the outer side close to the three vibrating discs, the arc-shaped stop block 4.11 is used for stopping the bolt to prevent the bolt from falling off, and the inclination direction and the inclination angle of the arc-shaped stop block 4.11 and the rotary table 4.1 are consistent; the feed rail 4.12 of the aftertreatment device 5 extends below the end of the curved stop 4.11.

The bolts are orderly arranged after being vibrated by the bolt vibration disc 4.3 and slide up and down from the bolt track 4.6 to the rotary disc 4.1, the nuts of the bolts are erected on the arc-shaped openings 4.2 and the arc-shaped stop blocks 4.11, and the bolts rotate along with the rotary disc 4.1; the bushings are orderly arranged after being vibrated by a bushing vibrating disk 4.4, the bushings are vertically arranged on a bushing track 4.7, and the direction of through holes of the bushings is parallel to the ground; the gaskets are vibrated by the gasket vibration disk 4.5 and then are orderly arranged on the gasket tracks 4.8; the lower end of the lining track 4.7 is provided with a first track 4.9 below the turntable 4.1 along the outer diameter of the turntable 4.1, the first track 4.9 is positioned between the lining track 4.7 and the gasket track 4.8, the first track 4.9 is provided with a through hole along the radian direction, the front end of the blanking part of the lining of the first track 4.9 is provided with a lining baffle plate 9.1, the lining baffle plate 9.1 is used for preventing the lining from sliding out of the first track 4.9, the front end of the first track 4.9 is provided with two lining lugs 9.2 at the positions at two sides of the through hole, when the bush rolls down on the first track 4.9, the bush falls on the bush bump 9.2, when the bolt rotates to the upper part of the first track 4.9 following the rotary table 4.1, the lower end of the stud of the bolt passes through the through hole of the bush and the through hole of the first track 4.9 and is inserted into the bush on the bush bump 9.2, the bolt continues to rotate on the turntable 4.1, the lower end of the bolt drags the bush to move on the first track 4.9, and the bush is separated from the bush bump 9.2; the lower end of the washer track 4.8 is provided with a second track 4.10 below the turntable 4.1 along the outer diameter of the turntable 4.1, the second track 4.10 is positioned between the washer track 4.8 and the finished product collecting box 8, the front end of the second track 4.10 extends to the lower part of the first track 4.9, the second track 4.10 is provided with a through hole along the length direction, the front end of the second track 4.10 at the blanking part of the washer is provided with a washer baffle 10.1 for preventing the washer from sliding out, the front end of the second track 4.10 is provided with two washer convex blocks 10.2 at the two sides of the through hole, when the washer falls on the second track 4.10, the washer falls on the washer convex block 10.2, when the bolt with the bush inserted and sleeved at the lower end rotates to the upper part of the second track 4.10 along the turntable 4.1, the lower end of the bolt penetrates through the through hole of the washer and the through hole of the second track 4.10, the bush slides down to the washer below the washer, the bush overlaps with the washer, and drags on the second track 4.10, separating the gasket from the gasket projections 9.2; the tail end of the arc-shaped stop block 4.11, the tail end of the second track 4.10 and the front end of the feeding track 4.12 of the finished product collecting box 8 are aligned; when the bolt rotates to the tail end of the arc-shaped stop block 4.11, the lining and the washer are also positioned at the tail end of the second rail 4.10, the bolt and the nut are separated from the arc-shaped notch 4.2, overlapped with the lining and the washer, and fall onto the feeding rail 4.12 with the front end being flush with the tail end of the second rail 4.10, and are continuously conveyed to a subsequent collecting device on the feeding rail 4.12.

The working principle of the thread rolling equipment of the automobile hub fastening assembly is as follows: the bolts are orderly arranged after being vibrated by the bolt vibration disc 4.3 and slide up and down from the bolt track 4.6 to the rotary disc 4.1, the nut of the bolt is erected at the upper end of the arc opening 4.2, and the bolt is blocked by the arc stop block 4.11 and then rotates along with the rotary disc 4.1; the bushings are orderly arranged after being vibrated by the bushing vibrating disk 4.4 and then roll down to the first track 4.9 from the bushing track 4.7, when the bolt rotates to the position above the first track 4.9 along with the turntable 4.1, the lower end of the stud of the bolt penetrates through the through hole of the bushing and the through hole of the first track 4.9 and is inserted into the bushing on the bushing bump 9.2, the bolt continues to rotate on the turntable 4.1, the lower end of the bolt drags the bushing to move on the first track 4.9, and the bushing is separated from the bushing bump 9.2; the washers are vibrated by the washer vibrating disk 4.5 and then orderly arranged on the washer track 4.8, when the bolt with the bushing inserted at the lower end rotates to the upper part of the second track 4.10 along with the turntable 4.1, the lower end of the bolt stud penetrates through the through hole of the washer and the through hole of the second track 4.10, the bushing slides downwards from the stud of the bolt to the washer below the bolt, the bushing is overlapped with the washer, and the bolt drags the bushing and the washers to move on the second track 4.10 to separate the washers from the washer bumps 9.2; when the bolt rotates to the tail end of the arc-shaped stop block 4.11, the lining and the washer are also located at the tail end of the second rail 4.10, the bolt and the nut are separated from the arc-shaped opening 4.2 and are overlapped with the lining and the washer to form a fastening assembly of the automobile hub, finally the fastening assembly falls onto a feeding rail 4.12 which is flush with the tail end of the second rail 4.10, and the fastening assembly continuously moves on the feeding rail 4.12 to a finished product collecting box 8 to finish collection.

Claims

1. A production process of an automobile hub fastening assembly is characterized in that: the production process comprises the following specific steps:

3) placing the sawn blank into a chamfering machine for chamfering;

9) finally, the screws subjected to surface treatment are placed into a combined assembly mechanism, the screws, the bushings and the gaskets are assembled to form a fastening assembly of the automobile hub, and then the fastening assembly is placed into a finished product collecting box to be collected;

the production equipment used in the production process sequentially comprises a sawing device (1), a chamfering machine (5), a cold heading device (2), a thread rolling device (3), a heating furnace (6), a galvanizing device (7), a combined assembly mechanism (4) and a finished product collecting box (8) from the front to the back;

the sawing device (1) comprises a cutting mechanism (1.1) and a feeding mechanism (1.5), and the feeding mechanism (1.5) is arranged behind the cutting mechanism (1.1); the cutting mechanism (1.1) comprises a saw wheel (1.2) driven by a motor to rotate, a hopper (1.3) inclined downwards is arranged on the front side of the saw wheel (1.2), and a collecting box (1.4) is arranged below the hopper (1.3); the feeding mechanism (1.5) comprises a sliding base (1.6) arranged behind the saw wheel (1.2), the sliding base (1.6) is inserted and sleeved at the front ends of two transversely arranged guide pillars (1.8), the sliding base (1.6) slides back and forth at the front ends of the guide pillars (1.8), and the rear ends of the guide pillars (1.8) are inserted into the fixed base (1.7); a trolley (1.10) is arranged on the sliding base (1.6) in a sliding manner, and the trolley (1.10) moves left and right on the sliding base (1.6); the front end and the rear end of the sliding base (1.6) are provided with limiters;

placing the sawn blank into a chamfering machine (5) for chamfering; the chamfered blank is sent into a cold upsetting device (2), the cold upsetting device (2) comprises an upsetting mechanism (2.1) and a lubricating system (2.6), the upsetting mechanism (2.1) comprises an upper die (2.2) and a lower die (2.4), and the lubricating system (2.6) is arranged between the upper die (2.2) and the lower die (2.4); the upper die (2.2) is driven by an oil cylinder to do reciprocating linear stamping motion in the left-right direction, a stamping head (2.3) is arranged on the right side of the upper die (2.2), a plurality of bolt holes (2.5) for placing cylindrical materials are formed in the left side of the lower die (2.4), and the cylindrical materials in the bolt holes (2.5) are stamped by the stamping head (2.3); the lubricating system (2.6) comprises an oil pipe (2.7), the oil pipe (2.7) is arranged between the upper die (2.2) and the lower die (2.4), two ends of the oil pipe (2.7) are hinged with the support column (2.10) through bearings (2.11), and the oil pipe (2.7) can rotate relative to the support column (2.10); a plurality of valves (2.9) are arranged on the oil pipe (2.7), and the plurality of valves (2.9) are connected with oil injection pipes (2.8) facing the lower die (2.4);

the thread rolling device (3) comprises a rotating wheel (3.8) driven by a motor, the rotating wheel (3.8) is connected with a movable thread rolling plate (3.1) through a crank arm, a fixed thread rolling plate (3.2) and a material guide rail (3.7) are arranged on the thread rolling surface side of the movable thread rolling plate (3.1), the material guide rail (3.7) is obliquely arranged and is positioned on the right side of the fixed thread rolling plate (3.2), and vertical bolts are orderly arranged in the material guide rail (3.7); a pushing and blocking mechanism (3.3) is arranged on the rear side of the material guide rail (3.7), the pushing and blocking mechanism (3.3) comprises a pushing block (3.4) and a stop block (3.5) which are mutually linked, the front end of the pushing block (3.4) and the front end of the stop block (3.5) are both positioned below the material guide rail (3.7), and the rear end of the pushing block (3.4) and the rear end of the stop block (3.5) are mutually hinged and linked through a hinge piece (3.6); a material collecting box (3.9) is arranged below the movable thread rolling plate (3.1) and the fixed thread rolling plate (3.2), a conveying mechanism (3.11) is arranged on the left side of the material collecting box (3.9), the conveying mechanism (3.11) comprises a conveyor (3.12), a collecting hopper (3.13) is arranged at the top of the conveyor (3.12), and a collecting box (3.14) is arranged below the collecting hopper (3.13);

put the screw into heating furnace (6) and carry out thermal treatment, put the screw after the cooling into galvanizing equipment (7) and carry out surface galvanizing treatment, put the screw into combination assembly mechanism (4) finally, combination assembly mechanism (4) include carousel (4.1), evenly distributed's arc opening (4.2) is seted up to the circumference round of carousel (4.1), the outside clockwise direction of carousel (4.1) is provided with bolt vibration dish (4.3), bush vibration dish (4.4) and packing ring vibration dish (4.5) respectively, carousel (4.1) slope sets up, and carousel (4.1) is high being close to bolt vibration dish (4.3) department, is low being close to packing ring vibration dish (4.5) department, and carousel (4.1) is provided with arc dog (4.11) in the outside that is close to three vibration dish, and the nut frame of bolt is located arc opening (4.2) and arc dog (4.11), and arc dog (4.11) are the slope angle unanimous with carousel (4.1) slope angle, a feeding track (4.12) of the finished product collecting box (8) extends to the lower part of the tail end of the arc-shaped stop block (4.11); a bolt track (4.6) which inclines downwards is arranged on the bolt vibrating disk (4.3) and is connected with the rotary disk (4.1), a lining track (4.7) which inclines towards the rotary disk (4.1) is arranged on the lining vibrating disk (4.4), and a gasket track (4.8) which inclines towards the rotary disk (4.1) is arranged on the gasket vibrating disk (4.5); a first rail (4.9) is arranged at the lower end of the lining rail (4.7) below the rotary table (4.1) along the outer diameter of the rotary table (4.1), the first rail (4.9) is positioned between the lining rail (4.7) and the gasket rail (4.8), and the first rail (4.9) is provided with through holes along the radian direction of the first rail; the lower end of the gasket track (4.8) is provided with a second track (4.10) below the turntable (4.1) along the outer diameter of the turntable (4.1), the second track (4.10) is positioned between the gasket track (4.8) and the finished product collecting box (8), the front end of the second track (4.10) extends to the lower part of the first track (4.9), and the second track (4.10) is provided with a through hole along the length direction; the tail end of the arc-shaped stop block (4.11), the tail end of the second track (4.10) and the front end of the feeding track (4.12) of the finished product collecting box (8) are aligned.

2. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the sliding base (1.6) is driven by hydraulic pressure to slide back and forth at the front end of the guide post (1.8).

3. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the trolley (1.10) is pushed by the cylinder to move left and right on the sliding base (1.6).

4. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the upper ends of the sliding base (1.6) and the fixed base (1.7) are respectively provided with a carrier roller (1.9) with the length direction vertical to the guide pillar (1.8), a cylindrical blank (1.11) is erected at the upper ends of the two carrier rollers (1.9), the front end of the cylindrical blank (1.11) extends to the side of the saw wheel (1.2), and the length direction of the cylindrical blank (1.11) is consistent with the guide pillar (1.8).

5. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: an L-shaped baffle (1.12) is arranged on the right side of the trolley (1.10), the front end of the cylindrical blank (1.11) is erected on the baffle (1.12), and the side face of the cylindrical blank (1.11) abuts against the baffle (1.12).

6. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: an oil collecting tank (2.12) is arranged below the oil pipe (2.7), and lubricating oil in the oil collecting tank (2.12) is pumped into the oil pipe (2.7).

7. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the material collecting box (3.9) is internally provided with a downward inclined conveying hopper (3.10), and the conveying hopper (3.10) leads to the conveyor (3.12).

8. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: a plurality of convex strips (3.15) vertical to the conveying belt are arranged on the conveying belt in the conveyor (3.12).

9. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the front end of the first rail (4.9) at the blanking position of the bush is provided with a bush baffle (9.1), and two bush lugs (9.2) are arranged at the positions, located on the two sides of the through hole, of the front end of the first rail (4.9).

10. The production process of the automobile hub fastening assembly according to claim 1, characterized in that: the front end of the second rail (4.10) at the blanking position of the gasket is provided with a gasket baffle (10.1), and two gasket lugs (10.2) are arranged at the positions, located on the two sides of the through hole, of the front end of the second rail (4.10).