CN118080756A - Self-tapping nut cold heading device and cold heading method - Google Patents

Abstract

The invention relates to the technical field of metal processing and provides a self-tapping nut cold heading device and a cold heading method, wherein the self-tapping nut cold heading device comprises a lower machine body, the lower machine body is provided with a die cavity, an upper machine body is positioned above the lower machine body, the upper machine body is provided with a first sliding cavity, the first sliding cavity is vertically arranged, a punching head is arranged in the first sliding cavity in a lifting sliding manner, the punching head is provided with a blocking part, the blocking part is arranged on the punching head in a lifting sliding manner, the blocking part is driven to abut against or cancel abutting against the blocking part after the punching head slides, one end of a material taking part is hinged to the blocking part, the other end of the material taking part is arranged on the punching head in a lifting sliding manner, and a material conveying part is horizontally arranged on the upper machine body and positioned below the punching head. Through the technical scheme, the problem that the clamping effect of the method for transferring the processed nut intermediate material in each die by adopting the movable clamping jaw on the special-shaped nuts in the prior art is poor is solved.

Description

Self-tapping nut cold heading device and cold heading method

Technical Field

The invention relates to the technical field of metal processing, in particular to a self-tapping nut cold heading device and a cold heading method.

Background

The cold heading machine for nut is a special equipment for producing nut, and the metal strip is heated and compressed into screw thread shape by cold heading process, and the cold heading process is an advanced metal forming technology, and utilizes the capability of high-strength heat deformation alloy to bear external loading at low temperature to realize the forming of parts. In this process, the metal strip is first heated to a suitable temperature and then subjected to a continuous cold heading cycle under the action of the screw die. These cycling processes result in changes in the grain structure and arrangement within the metal strip, thereby forming the desired thread structure. In the cold heading process of the prior art, the middle material of the nut processed in each die is transferred by adopting the movable clamping jaw, and the device and the method are commonly used for clamping and transferring common nuts and have poor clamping effect on special-shaped nuts.

Disclosure of Invention

The invention provides a self-tapping nut cold heading device and a cold heading method, which solve the problem that the clamping effect of a method for transferring a processed nut intermediate material in each die by adopting a movable clamping jaw on a special-shaped nut in the related art is poor.

The technical scheme of the invention is as follows:

A self-tapping nut cold heading device, comprising:

a lower machine body, wherein the lower machine body is provided with a die cavity,

The upper machine body is positioned above the lower machine body and is provided with a first sliding cavity which is vertically arranged,

The stamping head is arranged in the first sliding cavity in a lifting sliding way and is provided with a blocking part,

The blocking piece is arranged on the stamping head in a lifting sliding way, and after the stamping head slides, the blocking piece is driven to abut against the blocking piece or cancel abutting against the blocking piece,

One end of the material taking piece is hinged to the blocking piece, the other end of the material taking piece is arranged on the stamping head in a lifting sliding manner,

The material conveying part is horizontally arranged on the upper machine body in a sliding mode and is located below the stamping head.

As a further technical solution, the material taking member includes:

A first rotating rod, one end of which is hinged with the baffle piece,

The first clamping block is arranged on the stamping head in a lifting sliding way,

One end of the second rotating rod is hinged with the first rotating rod, the other end of the second rotating rod is hinged with the first clamping block,

The second clamp splice, the second clamp splice sets up on the second bull stick, be located first bull stick with one side of the pin joint of second bull stick.

As a further technical scheme, the upper machine body is further provided with a second sliding cavity, the second sliding cavity is positioned below the first sliding cavity, the blocking piece is arranged in the second sliding cavity in a sliding mode, the upper machine body further comprises a first elastic piece, one end of the first elastic piece acts on the bottom of the first elastic piece, the other end of the first elastic piece acts on the bottom of the second sliding cavity, and the force of the blocking piece away from the bottom of the second sliding cavity is provided.

As a further technical scheme, the upper machine body is further provided with a slideway, and the material conveying piece comprises:

the first sliding block is arranged in the slideway in a sliding way,

The material conveying frame is rotatably arranged on the first sliding block and is provided with a sliding groove arranged along the horizontal direction,

The second sliding block is arranged in the sliding groove in a sliding way and is provided with a driven top part which is used for being pushed by a workpiece,

The clamping jaw piece is arranged on the second sliding block in a swinging way,

And one end of the second elastic piece acts on the second sliding block, and the other end of the second elastic piece acts on the inner wall of the sliding groove to provide a force for the second sliding block to approach the center of the material conveying frame.

As a further technical scheme, the second sliding block, the clamping jaw piece and the second elastic piece jointly form a clamping assembly, the clamping assembly is formed by arranging a plurality of circumferences on the material conveying frame, a plurality of clamping spaces are formed between the clamping assemblies, and two sides of the clamping spaces are respectively provided with a clamping inlet and a clamping outlet.

As a further technical scheme, the material conveying frame is provided with a rotating shaft part, the rotating shaft part is rotatably arranged on the first sliding block, the inner wall of the sliding way is provided with an inner sliding way, and the material conveying frame further comprises:

A first gear disposed on the rotation shaft portion,

The first rack is arranged on the upper machine body and positioned in the inner slide, and after the first sliding block slides towards the first rack, the first rack is meshed with the first gear.

As a further technical solution, the stopper has an extension portion, and further includes:

the second gear is rotatably arranged on the upper machine body, the rotation axis of the second gear is perpendicular to the sliding direction of the first sliding block,

A third gear, the second gear and the third gear are coaxially arranged,

A second rack provided on the protruding portion, the second gear being engaged with the second rack,

And the third rack is arranged on the first sliding block, and the third gear is meshed with the third rack.

As a further technical scheme, the die cavity is provided with a plurality of molding modules, the die cavity further comprises molding modules, the molding modules are arranged in the die cavity, the stamping head is also provided with a plurality of stamping heads, and the stamping heads are matched with the molding modules.

As a further technical scheme, the molding module at one end of the lower machine body is provided with a blanking port.

A self-tapping nut cold heading method, utilizing any one of the self-tapping nut cold heading devices, comprising the steps of:

S1: cutting the nut blank and then placing the cut nut blank into a clamping space,

S2: the nut blank is gradually moved and conveyed to the position of each die cavity along with the movement of the material conveying piece for upsetting processing,

S3: and finally processing the nut intermediate material at the position of the final molding module to enable the nut intermediate material to be processed into a final finished product material.

The working principle and the beneficial effects of the invention are as follows:

The invention designs an upper machine body and a lower machine body, wherein the lower machine body is mainly used as a die part and is matched with a stamping head arranged in the upper machine body in a lifting sliding manner, the die part is arranged to be gradually close to the progressive process of the shape of a nut, the stamping process of the stamping head drives the stamping head to slide by an additional driving piece so as to further realize the pressurizing of a workpiece, the arrangement of a material taking piece can realize the extrusion of the stamping head and a die cavity on intermediate materials of the nut, the nut after the upsetting processing is grabbed, one end of the material taking piece is hinged with a blocking piece, the other end of the blocking piece is in lifting sliding manner relative to the stamping head, and the material taking piece is changed along with the movement of the blocking piece so as to realize the processing effect on the nut material. Considering the transportation process of the nut intermediate material after grabbing and clamping, the conveying part is arranged between the die cavity and the material taking part, the nut intermediate material taken out of the die cavity by the material taking part can be caught by the conveying part in the process, the material taking part continuously rises and is separated from the nut material, after the nut material clamped on the conveying part is subjected to upsetting by the stamping head at the next corresponding position after the process of upsetting again, the nut material is separated from the conveying part and enters the die cavity, the integrity and fluency of the process of grabbing, conveying and upsetting nuts are realized, the material taking part and the conveying part are separated, the clamping jaw part in the prior art with fixed shapes is not relied on, and good transportation stability can be ensured in the grabbing and transporting process of the special-shaped nut.

Drawings

The above features, technical features, advantages and implementation of the present invention will be further described in the following description of preferred embodiments with reference to the accompanying drawings in a clear and easily understood manner.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the lower body of the present invention;

FIG. 3 is a schematic view showing the internal structure of the upper body in the present invention;

FIG. 4 is a schematic view of the internal structure of the upper body of a single station in the invention;

FIG. 5 is a schematic view of the internal structure of FIG. 4;

FIG. 6 is a schematic view of the internal structure of the material conveying rack in the present invention;

FIG. 7 is a schematic view showing the internal structure of the upper housing according to another embodiment of the present invention;

In the figure: the die comprises a lower machine body-1, a die cavity-101, an upper machine body-2, a first sliding cavity-201, a second sliding cavity-202, a slideway-203, an inner slide-204, a stamping head-3, a blocking part-301, a blocking part-4, an extending part-401, a material taking part-5, a first rotating rod-501, a first clamping block-502, a second rotating rod-503, a second clamping block-504, a material conveying part-6, a first sliding block-601, a material conveying frame-602, a sliding groove-603, a second sliding block-604, a driven top-605, a clamping jaw part-606, a second elastic part-607, a clamping space-608, a clamping inlet-609, a clamping outlet-610, a rotating shaft part-611, a first gear-7, a first rack-8, a second gear-9, a third gear-10, a second rack-11, a third rack-12, a plastic die-13, a blanking port-1301 and a first elastic part-14.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. In addition, in order to simplify the drawings and facilitate understanding, components having the same structure or function in some drawings are only schematically illustrated in one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one", and "a number" includes "two" and "two or more".

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 7, an embodiment of the invention provides a self-tapping nut cold heading device, which comprises a lower machine body 1, wherein the lower machine body 1 is provided with a die cavity 101, an upper machine body 2 is positioned above the lower machine body 1, the upper machine body 2 is provided with a first sliding cavity 201, the first sliding cavity 201 is vertically arranged, a punching head 3 is arranged in the first sliding cavity 201 in a lifting sliding manner, the punching head 3 is provided with a blocking part 301, a blocking part 4 is arranged on the punching head 3 in a lifting sliding manner, after the punching head 3 slides, the blocking part 301 is driven to abut against or cancel abutting against the blocking part 4, one end of a material taking part 5 is hinged on the blocking part 4, the other end of the material taking part is arranged on the punching head 3 in a lifting sliding manner, and a material conveying part 6 is horizontally arranged on the upper machine body 2 and positioned below the punching head 3.

In this embodiment, considering that in the existing cold heading process, the middle material of the nut processed in each die is transferred by adopting a moving clamping jaw, the device method is often used for clamping and transferring a common nut, the clamping effect on a special-shaped nut is poor, the scheme is designed to include an upper machine body 2 and a lower machine body 1, the lower machine body 1 is mainly used as a die part and is matched with a stamping head 3 arranged in the upper machine body 2 in a lifting sliding manner, the die part is set to be gradually close to the progressive process of the shape of the nut, the stamping process of the stamping head 3 is driven by an additional driving piece to slide so as to realize the pressurizing of a workpiece, after the stamping head 3 and a die cavity 101 are used for extruding the middle material of the nut, the nut after the upsetting processing is gripped, one end of the material taking piece 5 is hinged with a blocking piece 4, and the other end of the blocking piece 4 is lifted and slid relative to the stamping head 3, and the material taking piece 5 changes along with the moving occurrence state of the blocking piece 4, so that the processing effect on the nut material is realized. Considering the transportation process of the middle nut material after clamping, the scheme is provided with the material conveying part 6, the material conveying part 6 is arranged between the die cavity 101 and the material taking part 5, the middle nut material taken out of the die cavity 101 by the material taking part 5 can be caught by the material conveying part 6 in the process, the material taking part 5 continues to ascend and separate from the nut material, after the next upsetting processing, the nut material clamped on the material conveying part 6 is only required to be subjected to upsetting processing by the stamping head 3 at the next corresponding position, the nut material is separated from the material conveying part 6 and enters the die cavity 101, the integrity and fluency of the process of grabbing, conveying and upsetting the nuts are realized, the material taking part 5 and the material conveying part 6 are separated, and the process of grabbing and transferring the special-shaped nuts can also ensure good transferring stability without depending on the clamping jaw parts 606 in the prior art with fixed shapes.

Further, the material taking member 5 includes a first rotating rod 501, one end of the first rotating rod 501 is hinged to the blocking member 4, a first clamping block 502 is arranged on the punching head 3 in a lifting sliding manner, one end of a second rotating rod 503 is hinged to the first rotating rod 501, the other end of the second rotating rod is hinged to the first clamping block 502, a second clamping block 504 is arranged on the second rotating rod 503 and located on one side of a hinge point of the first rotating rod 501 and the second rotating rod 503.

In this embodiment, the material taking part 5 is mainly clamped by two parts of clamping blocks, the first clamping block 502 is always slidably arranged on the stamping head 3, and is abutted against the groove of the inner ring pressed out by the pier after sliding down, so that the clamping blocks are not affected in the process of clamping the middle nut, and the blocking limiting effect of the bottom die in the process of pier pressing is considered.

Further, the upper body 2 further has a second sliding cavity 202, the second sliding cavity 202 is located below the first sliding cavity 201, the blocking member 4 is slidably disposed in the second sliding cavity 202, and the upper body further includes a first elastic member 14, one end of the first elastic member 14 acts on the bottom of the first elastic member 14, and the other end acts on the bottom of the second sliding cavity 202, so as to provide a force for the blocking member 4 to be away from the bottom of the second sliding cavity 202.

In this embodiment, the bottom in first smooth chamber 201 is provided with second smooth chamber 202, and inside is provided with first elastic component 14, can make on the one hand keep off piece 4 reset after the gliding, on the other hand can realize the effect that keeps off piece 4 delay was pushed down after the mound pressure head pushes down, carries out the centre gripping to the bolt intermediate stock after the mound is pressed, can make mound process more smooth and easy to press to and the efficiency that the clamp of messenger's work piece was got can be improved.

Further, the upper body 2 is further provided with a slide way 203, the material conveying member 6 comprises a first slide block 601, the first slide block 601 is slidably arranged in the slide way 203, the material conveying frame 602 is rotatably arranged on the first slide block 601, the material conveying frame 602 is provided with a slide groove 603 arranged along the horizontal direction, the second slide block 604 is slidably arranged in the slide groove 603, the second slide block 604 is provided with a top 605 which is used for being pushed by a workpiece, the clamping jaw member 606 is arranged on the second slide block 604 in a swinging manner, one end of the second elastic member 607 acts on the second slide block 604, and the other end acts on the inner wall of the slide groove 603, so that the force of the second slide block 604 approaching the center of the material conveying frame 602 is provided.

In this embodiment, the conveying of the bolt intermediate material is realized by means of the conveying member 6, the sliding of the conveying member 6 is realized by the first sliding block 601, the conveying frame 602 rotates on the first sliding block 601, the first sliding block 601 moves between two adjacent mold cavities 101, and rotates in the transferring process between the two mold cavities 101, so that the transferring process of the workpiece is smoother, and meanwhile, the double-sided upsetting can be performed through the reversing of the nut intermediate material, so that a more efficient upsetting effect is realized. The clamping jaw member 606 is arranged on the second sliding block 604 in a swinging way, when the nut intermediate material is clamped and pulled up, the nut intermediate material is pulled to the position of the clamping jaw member 606, and the rotation of the clamping jaw member 606 and the cooperation of the second sliding block 604 and the second elastic member 607 realize the stable clamping and transferring of the nut intermediate material.

Further, the second slider 604, the clamping jaw member 606 and the second elastic member 607 together form a clamping assembly, the clamping assembly is a plurality of circumferentially arranged on the material conveying frame 602, a clamping space 608 is formed between the plurality of clamping assemblies, and two sides of the clamping space 608 are respectively provided with a clamping inlet 609 and a clamping outlet 610.

In this embodiment, under the cooperation of multiple clamping assemblies, the positions of the clamping inlet 609 and the clamping outlet 610 can be replaced successively, after the clamping space 608 is clamped, the material conveying piece 6 moves to the position of the next mold cavity 101, and after the material conveying piece is turned over in the movement, the punching head 3 presses down to pier the turned nut intermediate. The fixed structure is more simplified, the workpiece is more stable to fix, and the stable clamping is realized by using a simpler mechanical structure, so that the structure is more stable and not easy to damage.

Further, the material conveying frame 602 has a rotating shaft portion 611, the rotating shaft portion 611 is rotatably disposed on the first slider 601, the inner wall of the slide 203 has an inner slide 204, and the material conveying frame further includes a first gear 7 disposed on the rotating shaft portion 611, a first rack 8 disposed on the upper body 2 and located in the inner slide 204, and after the first slider 601 slides in the direction of the first rack 8, the first rack 8 is engaged with the first gear 7.

In this embodiment, the first gear 7 and the first rack 8 cooperate to rotate the material conveying frame 602 during the moving process, and the inner slide 204 is configured to make the movement of the material conveying frame 602 more stable. The first racks 8 are arranged at intervals, are meshed to rotate after moving to the rack parts, and are meshed to rotate reversely again after moving reversely by the material conveying frame 602, so that the effect of driving the nut intermediate material to repeatedly rotate from the inside of the upper machine body 2 and gradually move to the die cavity 101 at the rear side of the process is achieved.

Further, the stopper 4 has an extension 401, further includes a second gear 9 rotatably provided on the upper body 2, and the rotation axis of the second gear 9 is perpendicular to the sliding direction of the first slider 601, the second gear 9 and the third gear 10 are coaxially provided, a second rack 11 is provided on the extension 401, the second gear 9 is engaged with the second rack 11, a third rack 12 is provided on the first slider 601, and the third gear 10 is engaged with the third rack 12.

In this embodiment, through the second rack 11 of vertical setting on keeping off piece 4, with the meshing of second gear 9, the transmission of transmission effect is realized to the coaxial setting of second gear 9 and third gear 10, move the vertical direction of keeping off piece 4 and convert into the effect that makes defeated work or material rest 602 horizontal migration, the drive motion effect of keeping off piece 4 in punching press head 3 is the lift reciprocating motion, pass through the transmission effect of second rack 11, second gear 9, third rack 12 and third gear 10, make the removal form of defeated material 6 appear the reciprocating motion of horizontal direction, the simplification of power has been realized, the cooperation between messenger's defeated material 6 and the punching press head 3 is more stable, the cooperation error that two sets of different transmission systems produced has been prevented, the operation of whole device is smoother, when simplifying device driving system, the machining efficiency of whole cold heading device has also been promoted.

Further, the mold cavity 101 has a plurality of mold modules 13, and the mold modules 13 are arranged in the mold cavity 101, and the punch 3 has a plurality of punch heads 3 which are matched with the mold modules 13.

In this embodiment, a plurality of mold cavities 101 are provided, and molding mold pieces 13 with different shapes are provided in each mold cavity 101, so that nut blanks can be gradually changed into the shapes of finished nuts after the different mold cavities 101 are sequentially processed, and the gradual upsetting processing of the nuts can be realized through the arrangement of a plurality of mold cavities 101 and the molding mold pieces 13, so that the influence on the quality of nut parts caused by single upsetting is prevented, and the condition that the workpieces are damaged due to overlarge concentrated stress is prevented.

Further, the molding module 13 at one end of the lower body 1 has a blanking port 1301.

In this embodiment, a blanking hole 1301 is formed in the molding module 13 at one end of the lower machine body 1, and the intermediate nut material subjected to multiple upsetting is finally molded at this position, so that the effect of concentrated collection after blanking is achieved after the final finished bolt material is processed.

The embodiment also provides a self-tapping nut cold heading method, which comprises the following steps:

S1: the nut blank is cut and placed into the clamping space 608,

S2: the nut blank is gradually moved and conveyed to the position of each die cavity 101 along with the movement of the material conveying piece 6 for upsetting processing,

S3: the intermediate nut material is finally processed at the location of the final molding module 13, so that the intermediate nut material is processed into a final finished product.

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

Claims (10)

1. The utility model provides a self-tapping nut cold heading device which characterized in that includes:

a lower body (1), the lower body (1) having a mold cavity (101),

The upper machine body (2), the upper machine body (2) is positioned above the lower machine body (1), the upper machine body (2) is provided with a first sliding cavity (201), the first sliding cavity (201) is vertically arranged,

The stamping head (3) is arranged in the first sliding cavity (201) in a lifting sliding way, the stamping head (3) is provided with a blocking part (301),

The baffle (4) is arranged on the stamping head (3) in a lifting sliding way, after the stamping head (3) slides, the baffle (301) is driven to abut against the baffle (4) or cancel abutting against,

One end of the material taking piece (5) is hinged to the baffle piece (4), the other end of the material taking piece (5) is arranged on the stamping head (3) in a lifting sliding manner,

The material conveying part (6), the material conveying part (6) is horizontally arranged on the upper machine body (2) in a sliding manner and is positioned below the stamping head (3).

2. A self-tapping nut cold heading device according to claim 1, characterized in that said material taking member (5) comprises:

a first rotating rod (501), one end of the first rotating rod (501) is hinged with the baffle (4),

The first clamping block (502), the first clamping block (502) is arranged on the stamping head (3) in a lifting sliding way,

A second rotating rod (503), one end of the second rotating rod (503) is hinged with the first rotating rod (501), the other end is hinged with the first clamping block (502),

And the second clamping block (504) is arranged on the second rotating rod (503) and is positioned on one side of the hinge point of the first rotating rod (501) and the second rotating rod (503).

3. The self-tapping nut cold heading device according to claim 1, wherein the upper machine body (2) further comprises a second sliding cavity (202), the second sliding cavity (202) is located below the first sliding cavity (201), the blocking piece (4) is slidably arranged in the second sliding cavity (202), the self-tapping nut cold heading device further comprises a first elastic piece (14), one end of the first elastic piece (14) acts on the bottom of the first elastic piece (14), the other end acts on the bottom of the second sliding cavity (202), and the force of the blocking piece (4) away from the bottom of the second sliding cavity (202) is provided.

4. The self-tapping nut cold heading device according to claim 1, characterized in that said upper body (2) further has a slide (203), said feeding member (6) comprising:

A first slider (601), the first slider (601) is slidingly arranged in the slideway (203),

The material conveying frame (602), the material conveying frame (602) is rotatably arranged on the first sliding block (601), the material conveying frame (602) is provided with a sliding groove (603) arranged along the horizontal direction,

A second slider (604), the second slider (604) being slidably arranged in the chute (603), the second slider (604) having a quilt top (605), the quilt top (605) being for being pushed by a workpiece,

A jaw member (606), said jaw member (606) being arranged swingably on said second slider (604),

And one end of the second elastic piece (607) acts on the second sliding block (604), and the other end acts on the inner wall of the sliding groove (603), so that the second sliding block (604) is provided with a force close to the center of the material conveying frame (602).

5. The self-tapping nut cold heading device as claimed in claim 4, wherein the second slider (604), the clamping jaw member (606) and the second elastic member (607) together form a clamping assembly, the clamping assembly is a plurality of circumferentially arranged on the material conveying frame (602), a clamping space (608) is formed between the clamping assemblies, and two sides of the clamping space (608) are respectively provided with a clamping inlet (609) and a clamping outlet (610).

6. The self-tapping nut cold heading device as claimed in claim 4, wherein the material conveying frame (602) has a rotating shaft portion (611), the rotating shaft portion (611) is rotatably disposed on the first slider (601), an inner wall of the slideway (203) has an inner slideway (204), and the self-tapping nut cold heading device further comprises:

A first gear (7), the first gear (7) being arranged on the rotating shaft part (611),

The first rack (8), first rack (8) set up on last organism (2), be located in interior slider (204), first slider (601) to behind first rack (8) direction slip, first rack (8) with first gear (7) meshing.

7. The self-tapping nut cold heading device as defined in claim 4, wherein said stopper (4) has an extension (401), further comprising:

A second gear (9), wherein the second gear (9) is rotatably arranged on the upper machine body (2), the rotation axial direction of the second gear (9) is perpendicular to the sliding direction of the first sliding block (601),

A third gear (10), the second gear (9) and the third gear (10) are coaxially arranged,

A second rack (11), the second rack (11) is arranged on the protruding part (401), the second gear (9) is meshed with the second rack (11),

And a third rack (12), wherein the third rack (12) is arranged on the first sliding block (601), and the third gear (10) is meshed with the third rack (12).

8. A self-tapping nut cold heading device according to claim 1, characterized in that said mould cavity (101) has a plurality, further comprising a molding module (13), said molding module (13) being arranged in said mould cavity (101), said punch head (3) also having a plurality, said punch head (3) cooperating with said molding module (13).

9. A self-tapping nut cold heading device as in claim 8, characterized in that said molding module (13) at one end of said lower body (1) has a blanking mouth (1301).

10. A self-tapping nut cold heading method, characterized by using the self-tapping nut cold heading device as claimed in any one of claims 1 to 9, comprising the following steps:

s1: the nut blank is cut and placed into a clamping space (608),

S2: the nut blank is gradually moved and conveyed to the positions of the die cavities (101) along with the movement of the material conveying piece (6) for upsetting,

S3: and finally processing the nut intermediate material at the position of the final molding module (13) to enable the nut intermediate material to be processed into a final finished product material.