CN219443251U

CN219443251U - Cold heading production line

Info

Publication number: CN219443251U
Application number: CN202320671502.1U
Authority: CN
Inventors: 金建林; 叶时孙; 周珺; 陈欢庆; 范忠根
Original assignee: Haiyan Zhengmao Standard Component Co ltd
Current assignee: Haiyan Zhengmao Standard Component Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-08-01
Anticipated expiration: 2033-03-29

Abstract

The utility model provides a cold heading production line, which comprises a wire storage device, a rolling device, a traction cutting device and a cold header which are sequentially arranged; the wire storage device is provided with a metal wire; the rolling device is provided with a stepped rolling cavity; the traction cutting device comprises a cutting mechanism and an active traction mechanism, wherein the active traction mechanism is close to one side of the rolling device, and the cutting mechanism is close to the cold header; and a conveying device is arranged between the cold header and the cutting mechanism. The utility model has the following beneficial effects: partial forming work is completed before cold heading through the cooperation of wire rod storage device, roll-in device and traction cutting device, and when it has solved among the current cold heading technique, cold heading shaping step diameter is great part, exists and need adopts many sets of moulds, leads to the higher technical problem of production line cost.

Description

Cold heading production line

Technical Field

The utility model relates to the technical field of screw and bolt production, in particular to a cold heading production line.

Background

Cold heading is a forging method for upsetting and forming a metal wire rod at normal temperature by using a die, and is commonly used for manufacturing screws, bolts, rivets and the like, wherein the metal wire rod can be copper, aluminum, carbon steel, alloy steel, stainless steel, titanium alloy and the like.

The cold heading is usually performed on a cold header, for example, the working procedures of blanking, heading, accumulating, forming, chamfering, thread rolling, reducing, trimming and the like are sequentially completed on the cold header.

In the forming process, a screw is taken as an example, and because the diameter difference between the screw rod part and the screw head part of the screw is large, a plurality of groups of dies are generally required to sequentially perform cold heading so as to ensure that the deformation amount during each cold heading is not too large and avoid the condition of breakage of metal wires.

Therefore, the forming part generally needs to adopt a plurality of groups of dies, and the dies in the cold heading process generally have higher cost, thereby leading to higher cost of cold heading production.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides a cold heading production line, which solves the technical problem that the cost of the production line is high because a plurality of sets of dies are needed when a part with a larger step diameter is formed by cold heading in the existing cold heading technology.

The cold heading production line comprises a wire stock storage device, a rolling device, a traction cutting device and a cold header which are sequentially arranged;

the wire storage device is provided with a metal wire;

the rolling device is provided with a stepped rolling cavity;

the traction cutting device comprises a cutting mechanism and an active traction mechanism, wherein the active traction mechanism is close to one side of the rolling device, and the cutting mechanism is close to the cold header;

and a conveying device is arranged between the cold header and the cutting mechanism.

The technical principle of the utility model is as follows: when metal wire passes through the rolling device, because through the circumferential position adjustment of the rolling device, the metal wire is extruded into the shape with the outer diameter changed through the different diameter positions of the stepped rolling cavity, then is cut off according to actual requirements through the cutting mechanism, and enters the conveying device after being cut off as shown in the attached figures 1-2, and finally is molded through the cold header, and because the front part is rolled through the rolling device, the required stepped part can be formed by only one cold heading, and only one cold heading means that only one group of cold heading dies are needed.

This application has increased roll-in device, but because roll-in device's echelonment roll-in chamber can set up the demand of a plurality of diameters, can satisfy most step form spare part, and the mould among the prior art is the special mould that corresponds specific part, and roll-in device of this application then is general equipment.

The active traction mechanism is used for providing driving force for the metal wire rod, and is also the active force for extrusion deformation of the metal wire rod in the rolling device.

Compared with the prior art, the utility model has the following beneficial effects: partial forming work is completed before cold heading through the cooperation of wire rod storage device, roll-in device and traction cutting device, and when it has solved among the current cold heading technique, cold heading shaping step diameter is great part, exists and need adopts many sets of moulds, leads to the higher technical problem of production line cost.

Further, the rolling device comprises two mutually meshed pressing rollers, stepped rolling cavities are arranged on the cylindrical surfaces of the two pressing rollers in a surrounding mode, and the edges of the two stepped rolling cavities are mutually overlapped.

Further, two of the press rollers are in transmission connection with a common roll motor.

Furthermore, the active traction mechanism comprises at least two groups of traction wheel groups, and a common interval sliding rail is arranged below all the traction wheel groups.

Further, the traction wheel group comprises two traction wheels which are symmetrically arranged, each traction wheel is connected with a traction motor, a shared width sliding rail is arranged below each traction wheel, each width sliding rail is arranged in each interval sliding rail, two sides of each width sliding rail are provided with a stop block, and compression springs are arranged between the stop blocks and the traction wheels.

Further, the cutting mechanism comprises a punching machine and a punching platform arranged at the lower side of the punching machine, a cutting edge is arranged on the punching machine, and the punching platform is inclined to one side of the conveying device.

Further, the stamping platform is provided with an inductor, and a telescopic rod for adjusting the vertical distance between the stamping platform and the inductor is arranged below the inductor.

Further, the rolling device, the cutting mechanism and the active traction mechanism are controlled by a common control system.

Further, the conveying device is a vibration disc, and the tail end of the vibration disc is communicated with the cold header.

Drawings

Fig. 1 is a schematic view of a two-step metal wire structure according to embodiment 1-2 of the present utility model.

Fig. 2 is a schematic view of a three-step metal wire structure according to embodiment 1-2 of the present utility model.

Fig. 3 is a schematic structural diagram of a cold heading line in embodiment 1 of the present utility model.

Fig. 4 is a schematic structural diagram of a wire storage device according to embodiment 1 of the present utility model.

Fig. 5 is a schematic view showing the structure of a rolling apparatus according to embodiment 1 of the present utility model.

Fig. 6 is a schematic view of the traction breaking apparatus according to embodiment 1 of the present utility model.

Fig. 7 is a schematic diagram of a traction wheel set structure according to embodiment 1 of the present utility model.

Fig. 8 is a block diagram showing the structure of a control system according to embodiment 1 of the present utility model.

Fig. 9 is a production process flow chart of the cold heading line of embodiment 1 of the present utility model.

Fig. 10 is a schematic diagram of a cold header line structure of embodiment 2 of the present utility model.

In the above figures: 100. a wire storage device; 110. a base; 120. a mandrel; 130. a metal wire; 200. a rolling device; 210. a press roller; 220. a stepped roll-in chamber; 230. a roll-in motor; 300. a cutting mechanism; 310. a punching machine; 311. a cutting edge; 320. a stamping platform; 321. an inductor; 322. a telescopic rod; 400. an active traction mechanism; 410. a traction wheel; 411. a compression spring; 420. a traction motor; 430. a spacing slide rail; 440. a width slide rail; 441. a stop block; 500. a cold header; 510. a transfer device; 600. a heating device; 700. and an air cooling device.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Example 1

The cold heading line shown in fig. 3 includes a wire storage device 100, a rolling device 200, a traction cutting device and a cold header 500, which are sequentially arranged; the specific wire storage device 100 is provided with a metal wire 130; the rolling device 200 is provided with a stepped rolling chamber 220 for the metal wire 130 to pass through.

The traction cutting device comprises a cutting mechanism 300 and an active traction mechanism 400, wherein the active traction mechanism 400 is close to one side of the rolling device 200 and is used for drawing the metal wire 130 to pass through the rolling device 200 and push the metal wire to the cutting mechanism 300, and the cutting mechanism 300 is close to the cold header 500, so that the cut metal wire 130 enters the cold header 500.

A conveying device 510 is arranged between the cold header 500 and the cutting mechanism 300, and is used for conveying the cut metal wire 130, wherein the conveying device 510 is a vibration disc, and the tail end of the vibration disc is communicated with the cold header 500.

As shown in fig. 4, the wire storage device 100 is a base 110 and a mandrel 120 disposed on the base 110, wherein the wire is wound on the mandrel 120, and a bearing is disposed between the mandrel 120 and the base 110 to facilitate rotation of the mandrel 120.

As shown in fig. 5, the rolling device 200 includes two intermeshed press rolls 210, wherein the cylindrical surfaces of the two press rolls 210 are all provided with stepped rolling cavities 220 in a surrounding manner, edges of the two stepped rolling cavities 220 are mutually overlapped, and further, when the metal wire 130 passes through, the metal wire can be extruded, so that the diameter of the metal wire is reduced, and a plurality of steps can be arranged in the specific stepped rolling cavities 220 so as to cope with parts with various diameter requirements.

As shown in fig. 5, two press rolls 210 are connected with a common roll motor 230 in a transmission manner, that is, the two press rolls 210 can be driven by the motor of the press roll 210 to adjust different positions to form extrusions with different diameters, and the specific roll motor 230 adopts a stepping motor so as to control the rotation angle of the press rolls 210.

As shown in fig. 6-7, the active traction mechanism 400 includes at least two sets of traction wheels 410 and traction motors 420 for driving all traction wheels 410, and a common interval slide rail 430 is disposed under all traction wheels 410 sets, i.e. the number of traction wheels 410 sets can be arbitrarily increased on the interval slide rail 430, and at least two sets are adopted in order to ensure that when one set has slip, the other set can continuously pull the metal wire 130.

The specific traction wheel 410 set comprises two symmetrically arranged traction wheels 410, each traction wheel 410 is connected with a traction motor 420 for driving the traction wheel 410, a shared width sliding rail 440 is arranged under the two traction wheels 410, the width sliding rails 440 are fixed in the interval sliding rails 430 by screws, two sides of the width sliding rail 440 are provided with stop blocks 441, compression springs 411 are arranged between the stop blocks 441 and the traction wheels 410, namely, the compression springs 411 are used for providing clamping force for the metal wire 130 with the diameter being changed, so that the traction wheel 410 can rotate to finish traction for the metal wire 130, and the traction motors 420 adopt stepping motors so as to calculate the distance of the traction wire.

As shown in fig. 6, the cutting mechanism 300 includes a punch 310 and a punching stage 320 provided at the lower side of the punch 310, and the punch 310 is provided with a cutting blade 311, that is, the punch 310 descends to cut the metal wire 130 on the punching stage 320, and the punching stage 320 is inclined toward the conveyor 510 side so that the cut metal wire 130 slides into the conveyor 510.

As shown in fig. 6. The stamping platform 320 is provided with an inductor 321, a telescopic rod 322 for adjusting the vertical distance between the telescopic rod and the stamping platform 320 is arranged below the inductor 321, the telescopic rod 322 is an electric push rod and is used for adjusting the height of the inductor 321 so as to further distinguish whether the metal wire 130 is on the stamping platform 320, and the telescopic rod 322 is used for adjusting the height position of the inductor 321 so as to sense the metal wire 130 more accurately.

As shown in fig. 8, the rolling device 200, the cutting mechanism 300 and the active traction mechanism 400 are provided with a common control system control, and the specific control system controls the operation of the inductor 321, the rolling motor 230, the traction motor 420 and the pressing machine 310.

As shown in fig. 9, the production process of the cold heading line includes:

s1, leading out: the wire 130 is led through the rolling device 200 and mounted to the active traction mechanism 400.

S2, rolling for the first time: the rolling device 200 is rotated to adjust the stepped rolling chamber 220 to a desired rolling diameter, where the press roller 210 needs to be rotated counterclockwise because the clockwise rotation gives the wire 130 a traction force to the active traction mechanism 400, and then the active traction mechanism 400 pulls the wire 130 forward, and after a certain distance of advance, the active traction mechanism 400 stops pulling, wherein the certain distance of advance is the length of the section of diameter.

S3, circulating rolling: s2 is repeated but before each run, the stepped roll-in chamber 220 is adjusted to another desired roll-in diameter, again requiring counter-clockwise rotation, ultimately rolling the wire 130 into 210 diameter converted wire 130, as shown in fig. 1-2.

S4, cutting: the rolled metal wire 130 in step S3 is cut when it reaches the cutting mechanism 300, and the specific cutting position may be cut at the change of the outer diameter as shown in fig. 1-2 or at the same outer diameter section.

S5, cold heading: the cut metal wire 130 in step S4 falls into the conveying device 510 and is then conveyed into the cold header 500 for cold header forming, and only a single cold header forming is generally required because the cut metal wire already has a rough outer diameter change.

Example 2

As shown in fig. 10, this embodiment differs from embodiment 1 in that: the heating device 600 is arranged between the wire storage device 100 and the rolling device 200, so that the metal wire 130 is heated, the metal wire is conveniently molded in the rolling device 200, and the air cooling device 700 is arranged between the rolling device 200 and the traction cutting device, so that the heated metal wire 130 is rapidly cooled, and the original strength is recovered.

The present embodiment can be applied to the metal wire 130 having poor plasticity at normal temperature, and the applied force 1 can be applied to the metal wire 130 having good plasticity at normal temperature only.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims

1. A cold heading production line which is characterized in that: comprises a wire stock storage device, a rolling device, a traction cutting device and a cold header which are arranged in sequence;

the wire storage device is provided with a metal wire;

the rolling device is provided with a stepped rolling cavity;

2. A cold heading line as defined in claim 1, wherein: the rolling device comprises two mutually meshed press rolls, wherein stepped rolling cavities are arranged on the cylindrical surfaces of the two press rolls in a surrounding mode, and the edges of the two stepped rolling cavities are mutually overlapped.

3. A cold heading line as defined in claim 2, wherein: the two press rollers are in transmission connection with a common rolling motor.

4. A cold heading line as defined in claim 1, wherein: the driving traction mechanism comprises at least two groups of traction wheel groups, and a common interval sliding rail is arranged below all the traction wheel groups.

5. The cold heading line of claim 4, wherein: the traction wheel group comprises two traction wheels which are symmetrically arranged, each traction wheel is connected with a traction motor, a shared width sliding rail is arranged below each traction wheel, each width sliding rail is arranged in each interval sliding rail, two sides of each width sliding rail are provided with a stop block, and compression springs are arranged between the stop blocks and the traction wheels.

6. A cold heading line as defined in claim 1, wherein: the cutting mechanism comprises a punching machine and a punching platform arranged at the lower side of the punching machine, a cutting edge is arranged on the punching machine, and the punching platform inclines to one side of the conveying device.

7. The cold heading line of claim 6, wherein: the stamping platform is provided with an inductor, and a telescopic rod for adjusting the vertical distance between the stamping platform and the inductor is arranged below the inductor.

8. A cold heading line as defined in claim 1, wherein: the rolling device, the cutting mechanism and the active traction mechanism are controlled by a common control system.

9. A cold heading line as defined in claim 1, wherein: the conveying device is a vibrating disc, and the tail end of the vibrating disc is communicated with the cold header.