CN217451940U

CN217451940U - Hexagonal wire clamping jig for cold header

Info

Publication number: CN217451940U
Application number: CN202221354579.8U
Authority: CN
Inventors: 李勇; 宋江磊; 陆仁杰
Original assignee: Stabio Fasteners Kunshan Co ltd
Current assignee: Stabio Fasteners Kunshan Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-20
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a hexagonal wire rod centre gripping tool for cold heading machine, including two clamping jaws of relative complex, arbitrary clamping jaw includes centre gripping claw head and dead lever, is equipped with the installation hole site on the free end of dead lever, and the overhead dovetail groove that is equipped with of centre gripping claw is equipped with emergent fracture portion on the dead lever of at least one clamping jaw, and emergent fracture portion is the fracture strip groove of setting on the dead lever. The utility model discloses an emergent fracture portion design can realize that the anchor clamps fracture blocks when the card material appears to prevent to appear the hard pay-off phenomenon under the card material state, reduced cold-heading equipment damage risk. The requirement can be satisfied emergently to block through the reasonable position setting of fracture strip groove, can not exert an influence to wire rod clamping stability simultaneously, and structural reinforcement piece can complement structural strength, effectively reduces centre gripping direction deformation, maintains the validity. The overall design is simple and ingenious, the stable supply of wire rods during cold heading can be guaranteed, the hard damage loss of clamping materials is reduced, and meanwhile, the clamp is low in cost and easy to replace and maintain.

Description

Hexagonal wire clamping jig for cold header

Technical Field

The utility model relates to a hexagonal wire rod clamping jig for cold heading machine belongs to the technical field of wire rod feeding jig.

Background

The cold header is special equipment which takes a pier as a main part and is specially used for producing fasteners such as nuts and bolts in batches. And carrying out cold heading forming on the wire rod after feeding the wire rod.

At present, a wire clamp is needed for feeding wires, the specifications of the wires are more, the cross sections of the wires are generally equihexagonal and circular, a traditional wire clamp adopts two clamping jaws which are matched relatively, a semicircular clamping groove is formed in each clamping jaw, clamping of the wires is achieved through the two semicircular clamping grooves, in order to increase clamping matching degree and applicability, a fillet groove and the like can be designed in the semicircular clamping groove, the clamping jaws have certain universality, but clamping locking stability is poor, and certain clamping damage is caused to the hexagonal wires.

To this condition, the utility model patent of grant publication No. CN203649275U discloses a centre gripping tool, for my prior patent application of department, my department's name has changed, and this centre gripping tool has adopted the design of two relative complex dovetail grooves to satisfy the stable centre gripping pay-off demand of hexagonal wire rod, can possess to a certain extent different specifications simultaneously and be compatible.

In practical application, some problems occur, the hexagonal wire is mainly used for forming the bolt cap by cold heading, the diameter of the bolt cap is larger than the diagonal size of the hexagonal wire, so that after feeding enters a cold heading stamping die, the hexagonal wire needs to be displaced in a relatively stable stepping mode, when the bolt cap is separated from the stamping die, the hexagonal wire is required to be in a stop state, generally, the feeding driving source of the clamping jig is used for controlling, however, the phenomenon that a rear-end cold heading forming fastener is clamped frequently occurs, at the moment, the feeding driving source can drive the clamping jig to carry out hard feeding, the hard feeding causes the rear-end clamping to generate secondary or even tertiary cold heading, after multiple times of hard feeding and cold heading extrusion, a forming cavity is blocked, overstocked material is very difficult to be demolded, mold damage is easily caused during hard extrusion and demolding, and even a serious person causes mold damage, and great economic loss is caused.

Disclosure of Invention

The utility model aims at solving the not enough of above-mentioned prior art, can appear the problem that hard pay-off leads to the mould damage under the card material control out of control state to traditional hexagonal wire rod centre gripping tool, provide the hexagonal wire rod centre gripping tool that is used for the cold heading machine.

In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:

a hexagonal wire clamping jig for a cold header comprises two clamping jaws which are matched oppositely, any clamping jaw comprises a clamping jaw head and a fixed rod, a mounting hole position is arranged at the free end of the fixed rod, a trapezoidal groove is arranged on the clamping jaw head,

at least one clamping jaw be equipped with emergent fracture part on the dead lever, emergent fracture part is for setting up fracture strip groove on the dead lever, and fracture strip groove is located the dead lever is towards one side of material conveying end.

Preferably, the groove direction of the breaking bar groove is perpendicular to the groove direction of the trapezoidal groove.

Preferably, a detachably mounted structural reinforcing block is arranged in the fracture strip groove.

Preferably, the section of the breaking bar groove is in an isosceles trapezoid shape, and the size of the inner wall of the breaking bar groove is larger than the size of the opening of the breaking bar groove.

Preferably, the structural reinforcing block is in interference fit with the breaking strip groove.

Preferably, the two clamping jaws are respectively provided with the emergency fracture parts.

Preferably, the clamping claw head and the fixing rod are integrally formed into a structural body, and the fracture strip groove is a milling groove formed in the fixing rod through milling.

Preferably, the trapezoidal groove is provided with a wear-resistant protective coating.

The beneficial effects of the utility model are mainly embodied in that:

1. the design of the emergency fracture part is adopted, so that the fracture blocking of the clamp can be realized when the wire feeding is blocked, the hard feeding phenomenon in the material blocking state is prevented, and the damage risk of cold heading equipment is reduced.

2. The requirement can be satisfied emergently to block through the reasonable position setting of fracture strip groove, can not exert an influence to wire rod clamping stability simultaneously, and structural reinforcement piece can complement structural strength, effectively reduces centre gripping direction deformation, maintains the validity.

3. The overall design is simple and ingenious, the stable supply of wire rods during cold heading can be guaranteed, the hard damage loss of clamping materials is reduced, and meanwhile, the clamp is low in cost and easy to replace and maintain.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is the utility model discloses a hexagonal wire rod clamping jig's for cold heading machine structural schematic.

Fig. 2 is a schematic structural view of the middle clamping jaw of the present invention.

Fig. 3 is a schematic structural view of a preferred embodiment of the clamping jaw of the present invention.

Fig. 4 is a structural schematic diagram of the middle clamping jaw of the utility model of force fracture.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The utility model provides a hexagonal wire rod centre gripping tool for cold heading machine, as shown in fig. 1 to 3, including two clamping jaws 1 of relative complex, arbitrary clamping jaw 1 includes centre gripping claw head 2 and dead lever 3, is equipped with installation hole site 30 on the free end of dead lever 3, is equipped with dovetail groove 4 on the centre gripping claw head 2.

As shown in fig. 1, when a hexagonal wire 10 is clamped, the clamping cooperation is performed through a pivot between two clamping jaws 1 or opening and closing, so that the trapezoidal grooves 4 of two clamping jaw heads 2 clamp the hexagonal wire 10, and the stability requirement of highly-matched clamping is met, which is the prior art. The two trapezoidal grooves 4 are matched to meet the requirements of compatible clamping and conveying of the hexagonal wire 10 with certain specification difference, and stable and reliable clamping and conveying are guaranteed.

Because this anchor clamps pinch material is reliable stable, consequently when cold-heading card material appearing, it can appear hard pay-off phenomenon, causes the stifled condition such as dying of rear end putty to take place easily, hardly realizes taking off the material behind the stifled dying of putty, can cause irreversible damage to the mould simultaneously, causes great economic loss.

In view of the above situation, referring to fig. 1 to 3, an emergency fracture portion is provided on the fixing rod 3 of at least one clamping jaw 1, the emergency fracture portion is a fracture strip groove 5 provided on the fixing rod 3, and the fracture strip groove 5 is located on one side of the fixing rod 3 facing the feeding end.

The specific implementation process and principle description are as follows:

hexagonal wire rod centre gripping tool is under normal pay-off state, as shown in fig. 1, it keeps comparatively reliably steadily that clamping force lasts the pay-off operation, when the cold-heading card material condition appears, clamping jaw 1 is exerted pressure towards the pay-off direction under the drive of pay-off driving source, hexagonal wire rod receives the reverse effort of card material this moment, this effort can continuously be used in centre gripping claw head 2, centre gripping claw head 2 and dead lever 3 can produce opposite effort, this effort can gather on this fracture strip groove 5, produce deformation and fracture between two relative cell walls of fracture strip groove 5, thereby produce the state as shown in fig. 4, block the wire rod and supply, cold-heading equipment has been protected.

In one embodiment, the groove direction of the breaking bar groove 5 is perpendicular to the groove direction of the trapezoidal groove 4.

Specifically, when the trapezoidal groove 4 is clamped relatively, the two fixing rods 3 are subjected to a clamping force of the relative clamping, and the slotting direction of the breaking strip groove 5 is perpendicular to the clamping force direction, so that the breaking strip groove 5 is not damaged by stress when the clamping force is applied, and a reliable clamping force is maintained.

In one embodiment, a structural reinforcement 6 is removably mounted within the breaking groove 5.

Specifically, because the breaking groove 5 is additionally arranged, the fixing rod 3 has a connecting part 7 with a small size, and the connecting part 7 is stressed and deformed or even broken when the fixing rod is blocked emergently.

And also can produce certain effort to connecting portion 7 during the centre gripping, long-term use can produce certain non-groove to deformation, consequently adopted the design of structure reinforcement piece 6, it is when normal use, can supply the structural strength of 3 centre gripping directions of dead lever, satisfies the stable demand that is difficult for deformation of centre gripping, and under emergent stress state, structure reinforcement piece 6 is in opening fracture strip groove 5, and fracture strip groove 5 can be opened by the atress and even connecting portion 7 fracture, and structure reinforcement piece 6 can not obstruct this process.

In one embodiment, as shown in fig. 3, the section of the breaking bar groove is isosceles trapezoid, and the size of the inner wall of the breaking bar groove is larger than the size of the opening of the breaking bar groove.

The inner wall in fracture strip groove is isosceles trapezoid's diapire promptly, and the uncovered of fracture strip groove is isosceles trapezoid's roof, so forms wedge structure, is difficult for producing 6 slippage phenomena of structure reinforcement piece, ensures that the clamping structure reinforcement is reliable and stable.

In one embodiment, the structural reinforcing blocks are interference fit with the breaking grooves. Satisfy and join in marriage and connect stability demand, it cooperatees with isosceles trapezoid's fracture strip groove, can maintain and carry on stability.

Certainly, when some structure reinforcement pieces were carried on, can adopt the fixed design of roof or one of roof and fracture strip groove of reinforcement piece, for example the structure reinforcement piece possesses an outer edge end, carries out the bolt lock solid with arbitrary one side of fracture strip groove both sides through outer edge end, guarantees that the structure reinforcement piece is difficult for droing, and the opening both ends of fracture strip groove can receive the force deformation to open simultaneously.

In one embodiment, the two jaws are each provided with an emergency break.

Specifically, under the general condition, the clamping jaws and the wire are locked, and when the wire is blocked emergently, the two clamping jaws are subjected to acting forces in two directions, so that synchronous emergency fracture response is fast, and the wire supply is effectively blocked.

In one embodiment, the clamping claw head and the fixing rod are integrally formed into a structural body, and the breaking groove is a milling groove milled and formed in the fixing rod.

The integrated structure body is the all-in-one machine machining forming, and the milling groove is used for the secondary machine machining forming of the integrated structure body, satisfies the production and structural strength demand of the clamping jaw, and is easy to reform and form old clamping jaws.

In a particular embodiment, the trapezoidal grooves 4 are provided with a wear-resistant protective coating. Specifically, since the high profile modeling is adopted, the hard contact of the corners, the ribs, and the like is eliminated, but the surface contact is adopted, and when the surfaces are contacted, certain scratches and overstocks are easily generated, and the clamped surface of the wire rod can be protected by the design of the wear-resistant protective coating, and the trapezoidal groove 4 is also well protected, so that the reliable wear-resistant operation is maintained.

Can discover through the above description, the utility model is used for hexagonal wire rod centre gripping tool of cold heading machine has adopted the design of emergent fracture portion, can realize that the anchor clamps fracture blocks when the card material appears in the wire rod feed to prevent to appear the hard pay-off phenomenon under the card material state, reduced cold heading equipment damage risk. The requirement can be satisfied emergently to block through the reasonable position setting of fracture strip groove, can not exert an influence to wire rod clamping stability simultaneously, and structural reinforcement piece can complement structural strength, effectively reduces centre gripping direction deformation, maintains the validity. The overall design is simple and ingenious, the stable supply of wire rods during cold heading can be guaranteed, the hard damage loss of clamping materials is reduced, and meanwhile, the clamp is low in cost and easy to replace and maintain.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A hexagonal wire clamping jig for a cold header comprises two clamping jaws which are matched oppositely, any clamping jaw comprises a clamping jaw head and a fixed rod, a mounting hole position is arranged at the free end of the fixed rod, a trapezoidal groove is arranged on the clamping jaw head,

the method is characterized in that:

2. The hexagonal wire clamping jig for the cold header as claimed in claim 1, wherein:

the groove direction of the breaking strip groove is perpendicular to the groove direction of the trapezoid groove.

3. The hexagonal wire clamping jig for the cold header as claimed in claim 1, wherein:

the fracture strip is internally provided with a detachable carried structural reinforcing block.

4. The hexagonal wire clamping jig for the cold header as claimed in claim 3, wherein:

the section of the broken strip groove is in an isosceles trapezoid shape, and the size of the inner wall of the broken strip groove is larger than the size of an opening of the broken strip groove.

5. The hexagonal wire clamping jig for the cold header as claimed in claim 3, wherein:

the structure reinforcing block is in interference fit with the fracture strip groove.

6. The hexagonal wire rod clamping jig for the cold header as claimed in any one of claims 1 to 5, wherein:

the two clamping jaws are respectively provided with the emergency fracture parts.

7. The hexagonal wire clamping jig for the cold header as claimed in claim 1, wherein:

the clamping claw head and the fixing rod are integrally formed into a structural body, and the fracture strip groove is a milling groove formed in the fixing rod through milling.

8. The hexagonal wire clamping jig for the cold header as claimed in claim 1, wherein:

and the trapezoid groove is provided with a wear-resistant protective coating.