CN114367618A - Step hexagonal flange screw forming process and device and step hexagonal flange screw - Google Patents
Step hexagonal flange screw forming process and device and step hexagonal flange screw Download PDFInfo
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- CN114367618A CN114367618A CN202210030988.0A CN202210030988A CN114367618A CN 114367618 A CN114367618 A CN 114367618A CN 202210030988 A CN202210030988 A CN 202210030988A CN 114367618 A CN114367618 A CN 114367618A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000004381 surface treatment Methods 0.000 claims abstract description 13
- 238000010008 shearing Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims description 33
- 238000007493 shaping process Methods 0.000 claims description 25
- 238000003825 pressing Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/06—Swaging presses; Upsetting presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/56—Making machine elements screw-threaded elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a step hexagonal flange screw forming process, a device and a step hexagonal flange screw, which comprises the steps of shearing a wire rod to form a required blank, reducing the diameter of the blank to deform to form a first preformed part, a second preformed part and a third preformed part, stamping the first preformed part to form a screw head blank and a first forming rod, binding the screw head blank to form a hexagonal head part, binding a rod at one end of the third preformed part to form a third forming rod and a fourth forming rod, stamping a chamfer at one end of the third preformed part far away from the first preformed part, stamping one end of the hexagonal head part to form a hexagonal flange platform, binding the second preformed part to form a groove and the second forming rod, cutting the fourth forming rod to the tail, rolling the third forming rod to form a thread, and then carrying out heat treatment and surface treatment on the step hexagonal flange screw. According to the step hexagonal flange screw forming process, a machining turning procedure is omitted, the product period is effectively shortened, and the product yield is improved.
Description
Technical Field
The invention belongs to the field of fastener forming, and particularly relates to a step hexagonal flange screw forming process and device and a step hexagonal flange screw.
Background
At present, a screw is a common fastener, and a tool for fastening machine parts of an object step by utilizing the physics and mathematical principles of the inclined plane circular rotation and the friction of the object is an indispensable industrial necessity in daily life: extremely small screws used in cameras, glasses, clocks, electronics, and the like; general screws for televisions, electric appliances, musical instruments, furniture, and the like; large screws and nuts are used for engineering, buildings and bridges; transportation equipment, airplanes, electric trains, automobiles and the like are combined by large and small screws, so that the screws have important tasks in industry, and the yield and the quality of the screws are important.
A screw that present car electrical apparatus box connects usefulness is step hexagon flange screw, contains many places shaping pole, and the side of the connecting portion of two places shaping poles is formed with annular groove, and the process flow of producing this kind of screw is: shearing → cold heading → tail cutting → machining turning → thread rolling → heat treatment → electroplating. The production process has long flow, the working procedures need to be matched with each other for production, the probability of the occurrence of poor products is high, and the problem of how to shorten the production period of the screw and reduce the reject ratio of the product is worth discussing.
Disclosure of Invention
In view of the problems in the prior art, the main object of the present invention is to provide a process and an apparatus for forming a stepped hexagon flange screw, and a stepped hexagon flange screw, wherein the process for forming a stepped hexagon flange screw discards the machining and turning procedure with the lowest production efficiency, and directly closes a die on a cold header to complete the forming of a forming rod, so that the process flow of the production process can be effectively shortened, the matched production among the procedures can be reduced, the reject ratio of products can be effectively reduced, and the production efficiency can be improved.
The purpose of the invention is realized by the following technical scheme:
the invention provides a step hexagonal flange screw forming process, wherein the step hexagonal flange screw comprises a rod part, a hexagonal head part, a hexagonal flange table, a first forming rod, a second forming rod, a third forming rod and a fourth forming rod which are sequentially arranged from one end of the rod part, and a groove is formed in the side face of a connecting part of the first forming rod and the second forming rod, and the step hexagonal flange screw forming process comprises the following steps:
cutting the wire to form a blank;
reducing and deforming the blank to form a first preforming part, a second preforming part and a third preforming part which are connected in sequence, wherein the diameters of the first preforming part, the second preforming part and the third preforming part are reduced in sequence;
stamping the first preformed part to form a screw head blank and the first forming rod, and stamping one end of the third preformed part far away from the first preformed part to form a chamfer;
angling the screw head blank to form the hex head;
after the hexagonal head is formed, a rod is tied at one end of the third preformed part far away from the hexagonal head to form a third forming rod and a fourth forming rod, and one end of the hexagonal head near the second preformed part is punched to form the hexagonal flange table;
after the hexagonal flange table is formed, the second pre-forming part is placed on a mold to be subjected to mold closing and pressing, so that the groove and a second forming rod are formed;
after the groove and the second forming rod are formed, cutting the tail of the fourth forming rod to enable the end part of the fourth forming rod to be spherical;
after the fourth forming rod is subjected to end cutting, thread rolling is carried out on the third forming rod so as to form threads on the outer surface of the third forming rod;
and after the threads are formed, performing heat treatment and surface treatment on the step hexagonal flange screw.
As a further description of the above technical solution, in the step "placing the second preform on a mold for mold clamping and pressing", the method further includes the steps of:
fixing one end of the fourth molding rod, which is far away from the hexagonal head, on the main mold;
abutting the hexagonal head with a die;
and the main die is matched with the stamping die along the axial direction of the step hexagonal flange screw so as to apply acting force to the second preformed part to form the groove and the second forming rod.
As a further description of the above technical solution, in the step of "thread rolling the third molding rod to form a thread on the outer surface thereof", specifically, the step of placing the third molding rod on a thread rolling machine, the thread rolling machine relatively reciprocating in a horizontal direction to rotate the third molding rod along its own axis to form a thread.
The invention also provides a device for forming the step hexagonal flange screw, wherein the step hexagonal flange screw comprises a rod part, a hexagonal head part, a hexagonal flange table, a first forming rod, a second forming rod, a third forming rod and a fourth forming rod which are sequentially arranged from one end of the rod part, and a groove is formed in the side surface of the connecting part of the first forming rod and the second forming rod, and the device comprises: the cold header is used for shearing and forming the wire rods, the hexagonal head of the step hexagonal flange screw, the hexagonal flange table and the forming rod, the tail cutting machine used for cutting the tail, the thread rolling machine used for rolling threads, the heat treatment equipment used for carrying out heat treatment on the step hexagonal flange screw after thread rolling, and the surface treatment equipment used for carrying out surface treatment on the step hexagonal flange screw.
As a further description of the above technical solution, the cold header includes a feeding unit, a shearing unit, a transfer unit, and five dies, and each of the five dies includes a main die and a punch die disposed corresponding to the main die.
As a further description of the above technical solution, the thread rolling machine includes a first thread rolling plate and a second thread rolling plate which are oppositely disposed, and the first thread rolling plate and the second thread rolling plate generate relative displacement along a horizontal direction, so as to drive the step hexagon flange screw to rotate around its own axis.
The present invention also provides a step hexagon flange screw, comprising:
the first forming rod, the second forming rod, the third forming rod and the fourth forming rod are arranged in sequence from one end of the rod part; and grooves are formed on the side surfaces of the connecting parts of the first forming rod and the second forming rod.
As a further description of the above technical solution, the groove is annular.
As a further description of the above solution, the third forming bar is formed with a thread.
In summary, the outstanding effects of the invention are as follows:
according to the forming process of the step hexagon flange screw, the machining turning procedure with the lowest production efficiency is abandoned, the forming of the forming rod is completed by directly assembling the die on the cold header, the production process flow is effectively shortened, the production efficiency of the step hexagon flange screw is improved, the speed of 65 screws per minute per machine can be achieved by verification, and the forming process is more suitable for batch production;
the step hexagon flange screw forming process reduces the production matching with the machining turning procedure, and effectively reduces the product reject ratio.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of a blank required in a step hexagon flange screw molding process according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a blank after reducing deformation in the step hexagon flange screw forming process according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first molding rod after molding in the step-hexagonal flange screw molding process according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a step hexagon flange screw molding process according to an embodiment of the present invention after a hexagon head is molded;
FIG. 5 is a schematic structural diagram of a third molding rod, a fourth molding rod and a hexagonal flange table after molding in the step hexagonal flange screw molding process according to the embodiment of the present invention;
FIG. 6 is a drawing of a mold closing in the step hexagon flange screw molding process according to the embodiment of the present invention;
fig. 7 is a diagram of a finished product after tail cutting and thread forming in the step hexagonal flange screw forming process according to the embodiment of the invention.
The reference numbers illustrate:
1-a blank; 2-a first preform section; 3-a second preform; 4-a third preform section; 51-a first forming bar; 52-hexagonal head; 53-hexagonal flange table; 54-a third forming bar; 55-a fourth forming bar; 56-grooves; 57-second forming bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or component must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 7, the present application provides a process for forming a stepped hexagon flange screw, which includes a rod portion, and a hexagon head 52, a hexagon flange table 53, a first forming rod 51, a second forming rod 57, a third forming rod 54, and a fourth forming rod 55, which are sequentially disposed from one end of the rod portion. A groove 56 is formed on a side surface of a connecting portion of the first molding rod 51 and the second molding rod 57, and any two adjacent ones of the first molding rod 51, the second molding rod 57, the third molding rod 54, and the fourth molding rod 55 have different radii.
First, referring specifically to fig. 1, a feeding unit feeds a wire into a cutting unit, and the cutting unit cuts the wire to form a blank 1.
Next, referring to fig. 2 specifically, the die shrinks the blank 1 to form a first preform 2, a second preform 3, and a third preform 4 connected in sequence, which define the first preform 2, the second preform 3, and the third preform 4 in sequence from left to right, and the diameters of which decrease in sequence.
Secondly, with particular reference to fig. 3, the first preformed part 2 is stamped by a die to form a screw head blank and the first forming rod 51, and the end of the third preformed part 4 remote from the first preformed part 2 is stamped to form a chamfer;
secondly, with particular reference to fig. 4, the screw head blank is subjected to a toe to form the hexagonal head 52;
next, referring specifically to fig. 5, after the hexagonal head 52 is formed, a rod is tied to an end of the third preform 4 away from the hexagonal head 52 to form the third molding rod 54 and the fourth molding rod 55, and an end of the hexagonal head 52 adjacent to the second preform 3 is punched to form the hexagonal flange 53.
Next, referring to fig. 6 specifically, after the hexagonal flange stage 53 is formed, the second preformed portion 3 is placed on a mold for clamping and pressing, specifically, the step of fixing one end of the fourth forming rod 55 away from the hexagonal head 52 on a main mold, at this time, the hexagonal head 52 abuts against a die, and the main mold clamps the die along the axial direction of the stepped hexagonal flange screw relative to the die to apply a force to the second preformed portion 3 to form the groove 56 and the second forming rod 57, where the groove 56 is annular.
Then, referring to fig. 7 in particular, after the grooves 56 and the second forming bars 57 are formed, the fourth forming bars 55 are trimmed to make the end portions thereof spherical, and then the third forming bars 54 are placed on the thread rolling machine. The thread rolling machine is started, which relatively reciprocates in the horizontal direction to rotate the third forming rod 54 along its own axis to form a thread on the outer surface thereof. And finally, carrying out heat treatment and surface treatment on the step hexagonal flange screw with the formed thread, wherein the surface treatment comprises the processes of coating, packaging and the like, and thus forming a final product.
The application still provides a device for step hexagonal flange screw is fashioned, step hexagonal flange screw include pole portion and certainly hexagonal head 52, hexagonal flange platform 53, first shaping pole 51, second shaping pole 57, third shaping pole 54 and fourth shaping pole 55 that the one end of pole portion set gradually, first shaping pole 51 with the side of the connecting portion of second shaping pole 57 is formed with recess 56. The device for forming the step hexagonal flange screw comprises a cold header, a tail cutting machine, a thread rolling machine, a heat treatment device and a surface treatment device, wherein the cold header is used for cutting and forming a wire rod, a hexagonal head 52, a hexagonal flange table 53 and a forming rod of the step hexagonal flange screw, the tail cutting machine is used for cutting a tail, the thread rolling machine is used for rolling threads, the heat treatment device is used for performing heat treatment on the step hexagonal flange screw after thread rolling, and the surface treatment device is used for performing surface treatment on the step hexagonal flange screw. The cold header is used for forming the shape and size requirements of the step hexagonal flange screw before cutting the tail, namely a forming hexagonal head 52, a hexagonal flange table 53 and a forming rod. The cold header model used was CBP-105S. The cold header is 5 dies and 5 punches, and the production speed is 65 counts per minute. The tail cutting machine is used for cutting the tail of the fourth forming rod 55, so that the end part of the fourth forming rod is spherical. The thread rolling machine is used for forming threads of the third forming rod 54, and the type of the thread rolling machine is common in the market. The heat treatment equipment is used for carrying out heat treatment on the step hexagonal flange screw after the thread is formed. The surface treatment equipment comprises the working procedures of coating, packaging and the like for the step hexagonal flange screw.
Specifically, in this embodiment, the cold header (not shown in the drawings) includes a feeding unit, a shearing unit, a conveying unit, and five dies, each of which includes a main die and a punch die corresponding to the main die, and is adapted to complete the preliminary forming of the product, that is, to meet the shape and size requirements of the product before the product is sheared.
Specifically, in this embodiment, the thread rolling machine (not shown in the drawings) includes a first thread rolling plate and a second thread rolling plate which are arranged oppositely, and the first thread rolling plate and the second thread rolling plate generate relative displacement along the horizontal direction, so as to drive the step hexagon flange screw to rotate around its own axis, so that the outer surface of the third molding rod 54 forms a thread.
Referring to fig. 7, the present application further provides a stepped hex flange screw, including: the forming die comprises a rod part, and a hexagonal head 52, a hexagonal flange table 53, a first forming rod 51, a second forming rod 57, a third forming rod 54 and a fourth forming rod 55 which are arranged in sequence from one end of the rod part; the side surface of the connecting part of the first molding rod 51 and the second molding rod 57 is formed with a groove 56, and the outer surface of the third molding rod 54 is formed with a thread. Wherein, the diameter of the first forming rod 51 is 6.7mm, and the length is 5 mm; the diameter of the second forming rod 57 is 6.7mm, and the length is 2.0 mm; the diameter of the third forming rod 54 is 5.25mm, and the length is 12 mm; the fourth molding rod 55 has a diameter of 4.0mm and a length of 5.5 mm. The second shaping pole 57 material less, to rod portion material and strict, just first shaping pole 51 with the recess 56 that the connecting portion side of second shaping pole 57 formed is the annular, makes the connecting portion of first shaping pole 51 and second shaping pole 57 is shaft-like, and the diameter is 6.0mm, long 12mm, and has abandoned traditional machine tooling forming process man-hour, adopts the cold-heading compound die to form, has practiced thrift raw and other materials, has reduced the cooperation production between the process, has effectively reduced the product defective rate, is applicable to batch production.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a step hexagonal flange screw molding process, step hexagonal flange screw include pole portion and certainly hexagonal head (52), hexagonal flange platform (53), first shaping pole (51), second shaping pole (57), third shaping pole (54) and fourth shaping pole (55) that the one end of pole portion set gradually, first shaping pole (51) with the side of the connecting portion of second shaping pole (57) is formed with recess (56), its characterized in that, includes following step:
cutting the wire to form a blank (1);
reducing and deforming the blank (1) to form a first preforming part (2), a second preforming part (3) and a third preforming part (4) which are connected in sequence, wherein the diameters of the first preforming part (2), the second preforming part (3) and the third preforming part (4) are reduced in sequence;
-stamping the first pre-form (2) to form a screw head blank and the first forming rod (51), -stamping the end of the third pre-form (4) remote from the first pre-form (2) to form a chamfer;
-angling the screw head blank to form the hexagonal head (52);
after the hexagonal head (52) is formed, binding rods at one end of the third preformed part (4) far away from the hexagonal head (52) to form a third forming rod (54) and a fourth forming rod (55), and punching one end of the hexagonal head (52) close to the second preformed part (3) to form a hexagonal flange table (53);
after the hexagonal flange table (53) is formed, the second preformed part (3) is placed on a mould to be subjected to clamping and pressing so as to form the groove (56) and a second forming rod (57);
after the groove (56) and the second forming rod (57) are formed, the fourth forming rod (55) is subjected to tail cutting, so that the end part of the fourth forming rod is spherical;
after the fourth molding rod (55) is trimmed, the third molding rod (54) is thread-twisted to form a thread on the outer surface thereof;
and after the threads are formed, performing heat treatment and surface treatment on the step hexagonal flange screw.
2. A process for forming stepped hex flange screws as claimed in claim 1, wherein the step of "placing said second preform (3) on a mold for clamping and pressing" further comprises the steps of:
fixing one end of the fourth molding rod (55) far away from the hexagonal head (52) on the main mold;
abutting the hexagonal head (52) against a die;
the main die is clamped relative to the die along the axial direction of the step hexagonal flange screw so as to apply force to the second preformed part (3) to form the groove (56) and the second forming rod (57).
3. The process for forming stepped hex flange screws as claimed in claim 1, wherein in the step of "threading said third forming bar (54) to form threads on an outer surface thereof", specifically includes placing said third forming bar (54) on a threading machine which is relatively reciprocated in a horizontal direction to cause said third forming bar (54) to rotate along its own axis to form threads.
4. The utility model provides a be used for fashioned device of step hexagonal flange screw, step hexagonal flange screw include pole portion and certainly hexagon head (52), hexagonal flange platform (53), first shaping pole (51), second shaping pole (57), third shaping pole (54) and fourth shaping pole (55) that the one end of pole portion set gradually, first shaping pole (51) with the side of the connecting portion of second shaping pole (57) is formed with recess (56), its characterized in that includes: the cold heading machine is used for shearing and forming the wire rods, the hexagonal head (52) of the step hexagonal flange screw, the hexagonal flange table (53) of the step hexagonal flange screw and the cold heading machine of the forming rod of the step hexagonal flange screw, the tail cutting machine used for cutting the tail, the thread rolling machine used for rolling threads, the heat treatment equipment used for carrying out heat treatment on the step hexagonal flange screw after thread rolling, and the surface treatment equipment used for carrying out surface treatment on the step hexagonal flange screw.
5. An apparatus for forming a stepped hexagonal flange screw according to claim 4, wherein the cold header includes a feeding unit, a shearing unit, a transfer unit, and five molds each including a main mold and a punch die disposed corresponding to the main mold.
6. An apparatus for forming a stepped hex flange screw according to claim 4, wherein the thread rolling machine includes a first thread rolling plate and a second thread rolling plate which are oppositely disposed, and the first thread rolling plate and the second thread rolling plate are relatively displaced in a horizontal direction to rotate the stepped hex flange screw about its own axis.
7. A step hex flange screw, comprising:
the device comprises a rod part, and a hexagonal head (52), a hexagonal flange table (53), a first forming rod (51), a second forming rod (57), a third forming rod (54) and a fourth forming rod (55) which are arranged in sequence from one end of the rod part; a groove (56) is formed on the side surface of the connecting part of the first molding rod (51) and the second molding rod (57).
8. A stepped hex flange screw according to claim 7, wherein said recess (56) is annular.
9. Stepped hex flange screw according to claim 7, wherein said third profiled bar (54) is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030988.0A CN114367618B (en) | 2022-01-12 | 2022-01-12 | Step hexagonal flange screw forming process, device and step hexagonal flange screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030988.0A CN114367618B (en) | 2022-01-12 | 2022-01-12 | Step hexagonal flange screw forming process, device and step hexagonal flange screw |
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| CN114367618A true CN114367618A (en) | 2022-04-19 |
| CN114367618B CN114367618B (en) | 2024-01-30 |
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| CN202210030988.0A Active CN114367618B (en) | 2022-01-12 | 2022-01-12 | Step hexagonal flange screw forming process, device and step hexagonal flange screw |
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| CN110238339A (en) * | 2019-06-04 | 2019-09-17 | 宾科汽车紧固件（昆山）有限公司 | The cold-heading molding device and manufacturing method of double step triangle tooth bolt |
| CN110425210A (en) * | 2019-09-05 | 2019-11-08 | 无锡超捷汽车连接技术有限公司 | Bolt and its manufacturing method is mounted in a kind of automobile-used integral type |
| CN214640002U (en) * | 2021-04-07 | 2021-11-09 | 温州市尖端标准件有限公司 | Hexagonal flange bolt tooling die |
| CN215355982U (en) * | 2021-08-16 | 2021-12-31 | 舟山市7412工厂 | Cold heading die for environment-friendly bolt manufacturing |
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| CN114367618B (en) | 2024-01-30 |
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