CN110695303A - Cold heading forming process and cold heading module of rhombic spot welding nut - Google Patents
Cold heading forming process and cold heading module of rhombic spot welding nut Download PDFInfo
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- CN110695303A CN110695303A CN201911098972.8A CN201911098972A CN110695303A CN 110695303 A CN110695303 A CN 110695303A CN 201911098972 A CN201911098972 A CN 201911098972A CN 110695303 A CN110695303 A CN 110695303A
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- 238000003466 welding Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 14
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 title description 2
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 30
- 239000010432 diamond Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 15
- 238000010008 shearing Methods 0.000 claims abstract description 6
- 239000011265 semifinished product Substances 0.000 claims description 176
- 238000007493 shaping process Methods 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000003490 calendering Methods 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 6
- 238000003892 spreading Methods 0.000 claims description 6
- 230000007480 spreading Effects 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- B21K1/64—Making machine elements nuts
- B21K1/70—Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- 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
- B21J5/002—Hybrid process, e.g. forging following casting
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Abstract
The invention provides a cold heading forming process and a cold heading module for a diamond spot welding nut. A cold heading forming process for manufacturing diamond spot welding nuts comprises the following steps: the diamond spot welding nut is obtained after the wire rod is subjected to material shearing, whole upsetting, rough upsetting, pre-upsetting, welding spot forming, diamond fine upsetting and square through hole punching. The cold-heading module includes: the first forming module is used for whole upsetting; the second forming module is used for rough heading; the third forming module is used for pre-upsetting; the fourth forming module is used for forming welding spots; the fifth forming module is used for precisely upsetting the rhombus; and the sixth forming module is used for punching the through square hole. The invention has the advantages of simple sequence, resultant process, material saving, complete metal flow line, part strength increase, processing procedure reduction and processing efficiency improvement.
Description
Technical Field
The invention relates to the field of machining, in particular to a cold heading forming process and a cold heading module for a diamond spot welding nut.
Background
The existing prismatic spot welding nut is generally processed and manufactured by adopting a punch forming or powder metallurgy method, but the service life of a die used for punch forming is short, and the production period, the efficiency and the cost are high by adopting the powder metallurgy production method.
Disclosure of Invention
In order to solve the problems mentioned in the background technology, the invention provides a cold heading forming process for manufacturing diamond spot welding nuts, which comprises the following steps: firstly, material shearing: cutting the wire rod by using scissors to obtain the required size; secondly, whole upsetting: forming a tangent plane at the bottom of the side edge of the wire rod section obtained in the step one, and simultaneously generating an inverted cone-shaped concave surface at the top of the wire rod section, thereby obtaining a first semi-finished product; thirdly, coarse upsetting: rolling the first semi-finished product obtained in the second step to enable the outer contour of the first semi-finished product to form a square rudiment, and simultaneously forming a circular groove in the center of the first semi-finished product to form a second semi-finished product; fourthly, pre-upsetting: further rolling and spreading the second semi-finished product obtained in the step three, so that the thickness of the second semi-finished product is reduced, and the side length of a square of the second semi-finished product is increased at the same time, and a third semi-finished product is formed; fifthly, forming welding spots: the square of the third semi-finished product obtained in the step four is further enlarged, a rectangular groove is formed in the center of the upper surface and the center of the lower surface of the third semi-finished product, two strip-shaped welding points are formed on the upper surface of the third semi-finished product, and the fourth semi-finished product is obtained; sixthly, fine upsetting diamond shape: welding spots on the fourth semi-finished product are more round through the fixed groove cavity, the fourth semi-finished product is rolled simultaneously, the side length of a square of the fourth semi-finished product meets the requirement, rectangular grooves in the upper surface and the lower surface of the fourth semi-finished product are further enlarged to meet the requirement, and a fifth semi-finished product is formed; seventhly, punching a through square hole: and removing the excess materials between the rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product to form through holes meeting the specification, namely finishing the cold heading forming of the diamond spot welding nut.
The invention also provides a cold heading module for manufacturing the diamond spot welding nut, which comprises: the first forming die set is used for forming an inclined plane at the bottom of the side edge of the wire rod section, and forming an inverted cone-shaped groove on the upper surface of the wire rod section to obtain a first semi-finished product;
the second forming module is used for calendering the first semi-finished product to enable the outer contour of the first semi-finished product to form a square embryonic form and generating a circular groove on the upper surface of the first semi-finished product so as to obtain a second semi-finished product;
the third forming module is used for further calendering and spreading the second semi-finished product, reducing the thickness of the second semi-finished product and increasing the side length of a square of the second semi-finished product so as to obtain a third semi-finished product;
the fourth forming module is used for forming a rectangular groove in the upper center and the lower center of the third semi-finished product, forming two strip-shaped welding spots on the upper surface of the third semi-finished product and further rolling the square of the third semi-finished product to obtain a fourth semi-finished product;
the fifth forming module is used for enabling the strip-shaped welding spots on the fourth semi-finished product to be more round and regular, and further calendering the fourth semi-finished product to meet the specification compounding requirement of a square;
and the sixth forming module is used for removing excess materials between the rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product to form a through hole with a composite specification so as to finish cold heading forming of the prismatic spot welding nut.
Wherein: first shaping module, second shaping module, third shaping module, fourth shaping module, fifth shaping module, sixth shaping module all include die and fundamental mode, and the die includes: punching die cover, die cushion, die thimble, the die cushion is installed punching die cover top, the die thimble is vertical to be passed punching die cover's center, and the master mould includes: the main die comprises a main die sleeve and a main die thimble, wherein the main die is fixed on a cold header, the main die thimble vertically penetrates through the center of the main die sleeve, the main die thimble can move up and down relative to the main die sleeve, the die thimble of the first forming module, the second forming module, the third forming module, the fourth forming module and the fifth forming module is used for forming a groove on the upper surface of a product, and the die thimble of the sixth forming module is used for forming a through hole in the center of the product and removing excess materials.
Furthermore, a cylindrical first forming cavity groove is formed in the upper section of the main die sleeve of the first forming die set, a slope surface is arranged at the bottom of the side wall of the first forming cavity groove, the upper surface of the first main die ejector pin is located at the bottom of the first forming cavity groove, the lower surface of the first die sleeve and the lower surface of the die ejector pin form an inverted conical surface structure, the cut wire rod section is placed in the first forming cavity groove, and the first die sleeve and the first die ejector pin perform cold heading treatment on the wire rod section in the first forming cavity groove together downwards, so that a slope is generated at the bottom of the side edge of the wire rod section, and an inverted conical concave surface is generated at the top of the wire rod section to form a first semi-finished product.
Further, the upper section of the main die sleeve of the second forming die set is provided with a square second forming cavity groove, the bottom of the side wall of the second forming cavity groove is set to be a slope structure, the upper surface of the second main die ejector pin is connected with a bottom slope of the second forming cavity groove, the second die ejector pin is of a cylindrical structure, the lower surface of the second die ejector pin protrudes out of the lower surface of the second die sleeve, the first semi-finished product is placed in the second forming cavity groove, the second die sleeve and the second die ejector pin move downwards together to perform rough heading on the first semi-finished product, so that the square rudiment is formed around the first semi-finished product, and meanwhile, a circular groove is reserved on the upper surface of the first semi-finished product, and the second semi-finished product is obtained.
Furthermore, the structure of the third molding module is similar to that of the second molding module, the side length of a third cavity groove of the third molding module is larger than that of a second molding cavity groove of the second molding module, the second semi-finished product is placed in the third molding cavity groove, and the third semi-finished product is further rolled under the combined action of a third punch sleeve and a third punch thimble, so that the third semi-finished product is obtained.
Furthermore, the upper section of the main die sleeve of the fourth forming module is provided with a square fourth forming cavity groove, the fourth main die ejector pin is a rounded rectangular column, the upper surface of the fourth main die ejector pin protrudes out of the bottom surface of the fourth forming cavity groove, the lower surface of the fourth die sleeve is provided with two linear spot welding grooves, the fourth die ejector pin is a rounded rectangular column, the lower surface of the die ejector pin protrudes out of the lower surface of the fourth die sleeve, the third semi-finished product is placed in the fourth forming cavity groove, the fourth die sleeve and the fourth die ejector pin move downwards together to form welding spots on the third semi-finished product, and meanwhile, rounded rectangular grooves with the same size and the same vertical position are formed in the upper surface and the lower surface of the third semi-finished product to obtain the fourth semi-finished product.
Furthermore, a square fifth forming cavity groove is formed in the upper section of the main die sleeve of the fifth forming die set, the fifth main die ejector pin is a rounded rectangular column, the upper surface of the fifth main die ejector pin protrudes out of the bottom surface of the fifth forming cavity groove, two linear welding spot grooves are formed in the upper surface of the fifth main die sleeve, the fifth die ejector pin is a rounded rectangular column, the lower surface of the fifth die ejector pin protrudes out of the lower surface of the fifth die sleeve, the fourth semi-finished product is placed in the fifth forming cavity groove after being turned over, a welding spot part of the fourth semi-finished product is correspondingly placed in the welding spot groove of the fifth main die sleeve, the fifth die sleeve and the fifth die ejector pin together perform fine upsetting diamond on the fourth semi-finished product downwards, so that the welding spot part of the fourth semi-finished product is more round, and the fourth semi-finished product is further rolled to enable the outer contour of the fourth semi-finished product to meet requirements, and obtaining a fifth semi-finished product.
Furthermore, the upper section of the main die sleeve of the sixth forming die set is provided with a positioning cavity groove, the bottom surface of the positioning cavity groove is provided with two linear spot welding grooves, the bottom of the positioning cavity groove is provided with a rounded rectangular through cavity, a fifth semi-finished product is placed in the positioning cavity groove, the sixth die sleeve downwards reaches the surface of the fifth semi-finished product and then compresses the fifth semi-finished product, the sixth die ejector pin continuously moves downwards to punch through the residual materials between the rounded rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product, and then the sixth rectangular ejector pin moves upwards to discharge the waste materials in the through cavity, so that the diamond-shaped spot welding nut is formed.
Compared with the prior art, the cold heading forming process and the cold heading module of the diamond spot welding nut have the following beneficial effects:
the diamond spot welding nut is formed by the processes of material shearing, whole upsetting, rough upsetting, pre-upsetting, welding spot forming, fine upsetting diamond, punching through square holes and seven cloth, the sequence is simple, the process is resultant, and the diamond spot welding nut has the advantages of saving materials, being complete in metal streamline, increasing the strength of parts, reducing processing procedures and improving the processing efficiency.
Drawings
FIG. 1 is a process flow diagram of cold heading forming of a diamond spot welding nut.
Fig. 2 is a schematic structural diagram of a cold heading die set for manufacturing diamond spot welding nuts.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in FIG. 1, the invention provides a cold heading forming process for manufacturing diamond spot welding nuts, which comprises the following steps: firstly, material shearing: cutting the wire rod by using scissors to obtain the required size; secondly, whole upsetting: forming a tangent plane at the bottom of the side edge of the wire rod section obtained in the step one, and simultaneously generating an inverted cone-shaped concave surface at the top of the wire rod section, thereby obtaining a first semi-finished product; thirdly, coarse upsetting: rolling the first semi-finished product obtained in the second step to enable the outer contour of the first semi-finished product to form a square rudiment, and simultaneously forming a circular groove in the center of the first semi-finished product to form a second semi-finished product; fourthly, pre-upsetting: further rolling and spreading the second semi-finished product obtained in the step three, so that the thickness of the second semi-finished product is reduced, and the side length of a square of the second semi-finished product is increased at the same time, and a third semi-finished product is formed; fifthly, forming welding spots: the square of the third semi-finished product obtained in the step four is further enlarged, a rectangular groove is formed in the center of the upper surface and the center of the lower surface of the third semi-finished product, two strip-shaped welding points are formed on the upper surface of the third semi-finished product, and the fourth semi-finished product is obtained; sixthly, fine upsetting diamond shape: welding spots on the fourth semi-finished product are more round through the fixed groove cavity, the fourth semi-finished product is rolled simultaneously, the side length of a square of the fourth semi-finished product meets the requirement, rectangular grooves in the upper surface and the lower surface of the fourth semi-finished product are further enlarged to meet the requirement, and a fifth semi-finished product is formed; seventhly, punching a through square hole: and removing the excess materials between the rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product to form through holes meeting the specification, namely finishing the cold heading forming of the diamond spot welding nut.
As shown in fig. 2, the present invention provides a cold heading module for manufacturing diamond spot welding nuts, comprising: the first forming die set is used for forming an inclined plane at the bottom of the side edge of the wire rod section, and forming an inverted cone-shaped groove on the upper surface of the wire rod section to obtain a first semi-finished product;
the second forming module is used for calendering the first semi-finished product to enable the outer contour of the first semi-finished product to form a square embryonic form and generating a circular groove on the upper surface of the first semi-finished product so as to obtain a second semi-finished product;
the third forming module is used for further calendering and spreading the second semi-finished product, reducing the thickness of the second semi-finished product and increasing the side length of a square of the second semi-finished product so as to obtain a third semi-finished product;
the fourth forming module is used for forming a rectangular groove in the upper center and the lower center of the third semi-finished product, forming two strip-shaped welding spots on the upper surface of the third semi-finished product and further rolling the square of the third semi-finished product to obtain a fourth semi-finished product;
the fifth forming module is used for enabling the strip-shaped welding spots on the fourth semi-finished product to be more round and regular, and further calendering the fourth semi-finished product to meet the specification compounding requirement of a square;
and the sixth forming module is used for removing excess materials between the rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product to form a through hole with a composite specification so as to finish cold heading forming of the prismatic spot welding nut.
Wherein: first shaping module, second shaping module, third shaping module, fourth shaping module, fifth shaping module, sixth shaping module all include die and fundamental mode, and the die includes: punching die cover, die cushion, die thimble, the die cushion is installed punching die cover top, the die thimble is vertical to be passed punching die cover's center, and the master mould includes: the main die comprises a main die sleeve and a main die thimble, wherein the main die is fixed on a cold header, the main die thimble vertically penetrates through the center of the main die sleeve, the main die thimble can move up and down relative to the main die sleeve, the die thimble of the first forming module, the second forming module, the third forming module, the fourth forming module and the fifth forming module is used for forming a groove on the upper surface of a product, and the die thimble of the sixth forming module is used for forming a through hole in the center of the product and removing excess materials.
The upper section of the main die sleeve of the first forming module is provided with a cylindrical first forming cavity groove, the bottom of the side wall of the first forming cavity groove is provided with a slope surface, the upper surface of the first main die ejector pin is positioned at the bottom of the first forming cavity groove, the lower surface of the first die sleeve and the lower surface of the first die ejector pin form an inverted conical surface structure, a wire section after shearing is placed in the first forming cavity groove, the first die sleeve and the first die ejector pin carry out cold heading treatment on the wire section in the first forming cavity groove together downwards, so that the bottom of the side edge of the wire section generates a slope and an inverted conical concave surface at the top of the wire section, and a first semi-finished product is formed.
The upper section of the main die sleeve of the second forming die set is provided with a square second forming cavity groove, the bottom of the side wall of the second forming cavity groove is set into a slope structure, the upper surface of the second main die ejector pin is connected with the bottom slope of the second forming cavity groove, the second die ejector pin is of a cylindrical structure, the lower surface of the second die ejector pin protrudes out of the lower surface of the second die sleeve, the first semi-finished product is placed in the second forming cavity groove, the second die sleeve and the second die ejector pin move downwards together to perform rough heading on the first semi-finished product, so that the four square rudiments formed on the periphery of the first semi-finished product leave a circular groove on the upper surface of the first semi-finished product, and the second semi-finished product is obtained.
Furthermore, the structure of the third molding module is similar to that of the second molding module, the side length of a third cavity groove of the third molding module is larger than that of a second molding cavity groove of the second molding module, the second semi-finished product is placed in the third molding cavity groove, and the third semi-finished product is further rolled under the combined action of a third punch sleeve and a third punch thimble, so that the third semi-finished product is obtained.
The upper section of a main die sleeve of the fourth forming module is provided with a square fourth forming cavity groove, a fourth main die ejector pin is a rounded rectangular column, the upper surface of the fourth main die ejector pin protrudes out of the bottom surface of the fourth forming cavity groove, the lower surface of the fourth die sleeve is provided with two linear spot welding grooves, the fourth die ejector pin is a rounded rectangular column, the lower surface of the die ejector pin protrudes out of the lower surface of the fourth die sleeve, the third semi-finished product is placed in the fourth forming cavity groove, the fourth die sleeve and the fourth die ejector pin move downwards together to form welding spots on the third semi-finished product, and meanwhile, the rounded rectangular grooves with the same size and the same vertical position are formed in the upper surface and the lower surface of the third semi-finished product to obtain the fourth semi-finished product.
The upper section of a main die sleeve of the fifth molding die set is provided with a square fifth molding cavity groove, the fifth main die thimble is a round-angle rectangular column, the upper surface of the fifth main die ejector pin protrudes out of the bottom surface of the fifth forming cavity groove, the upper surface of the fifth main die sleeve is provided with two linear welding spot grooves, the fifth die ejector pin is a round-angle rectangular column, the lower surface of the fifth die ejector pin protrudes out of the lower surface of the fifth die sleeve, the fourth semi-finished product is placed in the fifth forming cavity groove after being turned over, the welding spot part of the fourth semi-finished product is correspondingly placed in the welding spot groove of the fifth main die sleeve, the fifth die sleeve and the fifth die ejector pin together downwards perform fine upsetting diamond on the fourth semi-finished product, so that the welding spot part of the fourth semi-finished product is more round, and further rolling the fourth semi-finished product to enable the outer contour of the fourth semi-finished product to meet the requirement, so as to obtain a fifth semi-finished product.
The upper section of a main die sleeve of the sixth forming die set is provided with a positioning cavity groove, the bottom surface of the positioning cavity groove is provided with two linear spot welding grooves, the bottom of the positioning cavity groove is provided with a rounded rectangular through cavity, a fifth semi-finished product is placed in the positioning cavity groove, a sixth die sleeve downwards reaches the surface of the fifth semi-finished product and then compresses the fifth semi-finished product, a sixth die ejector pin continuously moves downwards to punch through excess materials between the rounded rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product, and then the sixth rectangular ejector pin moves upwards to discharge the waste materials in the through cavity to form the diamond spot welding nut.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. A cold heading forming process for manufacturing prismatic spot welding nuts is characterized in that: the cold heading forming process is specifically carried out according to the following steps: firstly, material shearing: cutting the wire rod by using scissors to obtain the required size; secondly, whole upsetting: forming a tangent plane at the bottom of the side edge of the wire rod section obtained in the step one, and simultaneously generating an inverted cone-shaped concave surface at the top of the wire rod section, thereby obtaining a first semi-finished product; thirdly, coarse upsetting: rolling the first semi-finished product obtained in the second step to enable the outer contour of the first semi-finished product to form a square rudiment, and simultaneously forming a circular groove in the center of the first semi-finished product to form a second semi-finished product; fourthly, pre-upsetting: further rolling and spreading the second semi-finished product obtained in the step three, so that the thickness of the second semi-finished product is reduced, and the side length of a square of the second semi-finished product is increased at the same time, and a third semi-finished product is formed; fifthly, forming welding spots: the square of the third semi-finished product obtained in the step four is further enlarged, a rectangular groove is formed in the center of the upper surface and the center of the lower surface of the third semi-finished product, two strip-shaped welding points are formed on the upper surface of the third semi-finished product, and the fourth semi-finished product is obtained; sixthly, fine upsetting diamond shape: welding spots on the fourth semi-finished product are more round through the fixed groove cavity, the fourth semi-finished product is rolled simultaneously, the side length of a square of the fourth semi-finished product meets the requirement, rectangular grooves in the upper surface and the lower surface of the fourth semi-finished product are further enlarged to meet the requirement, and a fifth semi-finished product is formed; seventhly, punching a through square hole: and removing the excess materials between the rectangular grooves on the upper surface and the lower surface of the fifth semi-finished product to form through holes meeting the specification, namely finishing the cold heading forming of the diamond spot welding nut.
2. The utility model provides a cold-heading module for making rhombus spot welding nut which characterized in that includes:
the first forming die set is used for forming an inclined plane at the bottom of the side edge of the wire rod section, and forming an inverted cone-shaped groove on the upper surface of the wire rod section to obtain a first semi-finished product;
the second forming module is used for calendering the first semi-finished product to enable the outer contour of the first semi-finished product to form a square embryonic form and generating a circular groove on the upper surface of the first semi-finished product so as to obtain a second semi-finished product;
the third forming module is used for further calendering and spreading the second semi-finished product, reducing the thickness of the second semi-finished product and increasing the side length of a square of the second semi-finished product so as to obtain a third semi-finished product;
the fourth forming module is used for forming a rectangular groove in the upper center and the lower center of the third semi-finished product, forming two strip-shaped welding spots on the upper surface of the third semi-finished product and further rolling the square of the third semi-finished product to obtain a fourth semi-finished product;
the fifth forming module is used for enabling the strip-shaped welding spots on the fourth semi-finished product to be more round and regular, and further calendering the fourth semi-finished product to meet the specification compounding requirement of a square;
the sixth shaping module for the clout between the rectangle recess of surface about with the fifth semi-manufactured goods is got rid of, forms the through-hole of compound specification, in order to accomplish the cold-heading shaping of prism spot welding nut, wherein: first shaping module, second shaping module, third shaping module, fourth shaping module, fifth shaping module, sixth shaping module all include die and fundamental mode, and the die includes: punching die cover, die cushion, die thimble, the die cushion is installed punching die cover top, the die thimble is vertical to be passed punching die cover's center, and the master mould includes: the main die comprises a main die sleeve and a main die thimble, wherein the main die is fixed on a cold header, the main die thimble vertically penetrates through the center of the main die sleeve, the main die thimble can move up and down relative to the main die sleeve, the die thimble of the first forming module, the second forming module, the third forming module, the fourth forming module and the fifth forming module is used for forming a groove on the upper surface of a product, and the die thimble of the sixth forming module is used for forming a through hole in the center of the product and removing excess materials.
3. The cold heading module for manufacturing the diamond spot welding nut as claimed in claim 2, wherein a cylindrical first forming cavity groove is formed in the upper section of the main die sleeve of the first forming module, a slope is formed at the bottom of the side wall of the first forming cavity groove, the upper surface of the first main die ejector pin is located at the bottom of the first forming cavity groove, the lower surface of the first die sleeve and the lower surface of the die ejector pin form an inverted conical surface structure, the cut wire rod is placed in the first forming cavity groove, and the first die sleeve and the first die ejector pin together perform cold heading on the wire rod in the first forming cavity groove downwards, so that the side bottom of the wire rod generates a slope and an inverted conical concave surface is formed at the top of the wire rod, and a first semi-finished product is formed.
4. The cold heading module for manufacturing the diamond spot welding nut as claimed in claim 2, wherein a square second forming cavity groove is formed in the upper section of the main die sleeve of the second forming module, a slope structure is formed at the bottom of the side wall of the second forming cavity groove, the upper surface of the second main die ejector pin is connected with a slope at the bottom of the second forming cavity groove, the second die ejector pin is of a cylindrical structure, the lower surface of the second die ejector pin protrudes out of the lower surface of the second die sleeve, the first semi-finished product is placed in the second forming cavity groove, the second die sleeve and the second die ejector pin move downwards together to perform rough heading on the first semi-finished product, so that a square blank is formed around the first semi-finished product, and a circular groove is left in the upper surface of the first semi-finished product to obtain the second semi-finished product.
5. The cold heading die set for manufacturing the diamond spot welding nut as claimed in claim 2, wherein the structure of the third forming die set is similar to that of the second forming die set, the side length of the third cavity groove of the third forming die set is larger than that of the second forming cavity groove of the second forming die set, the second semi-finished product is placed in the third forming cavity groove, and the third semi-finished product is further rolled through the cooperation of the third die sleeve and the third die ejector pin to obtain the third semi-finished product.
6. A cold heading module for manufacturing diamond spot welded nuts according to claim 2, the upper section of the main die sleeve of the fourth molding die set is provided with a square fourth molding cavity groove, the fourth main die thimble is a round-corner rectangular column, the upper surface of the fourth main die ejector pin protrudes out of the bottom surface of the fourth forming cavity groove, the lower surface of the fourth die sleeve is provided with two linear spot welding grooves, the fourth die ejector pin is a round-angle rectangular column, the lower surface of the die ejector pin protrudes out of the lower surface of the fourth die sleeve, the third semi-finished product is placed in a fourth forming cavity groove, a fourth die sleeve and a fourth die ejector pin move downwards together to form a welding spot on the third semi-finished product, and simultaneously forming round-corner rectangular grooves with the same size and the same vertical position on the upper surface and the lower surface of the third semi-finished product to obtain a fourth semi-finished product.
7. The cold heading die set for manufacturing the diamond-shaped spot welding nut as claimed in claim 2, wherein the upper section of the main die sleeve of the fifth forming die set is provided with a square fifth forming cavity groove, the fifth main die thimble is a rounded rectangular column, the upper surface of the fifth main die thimble protrudes out of the bottom surface of the fifth forming cavity groove, the upper surface of the fifth main die sleeve is provided with two linear welding spot grooves, the fifth die thimble is a rounded rectangular column, the lower surface of the fifth die thimble protrudes out of the lower surface of the fifth die sleeve, the fourth semi-finished product is placed in the fifth forming cavity groove after being turned over, the welding spot portion of the fourth semi-finished product is correspondingly placed in the welding spot groove of the fifth main die sleeve, and the fifth die sleeve and the fifth die thimble together perform fine heading diamond-shaped downward on the fourth semi-finished product, so that the welding spot portion of the fourth semi-finished product is more round, and further rolling the fourth semi-finished product to enable the outer contour of the fourth semi-finished product to meet the requirement, so as to obtain a fifth semi-finished product.
8. The cold heading die set for manufacturing the diamond spot welding nut as claimed in claim 2, wherein a positioning cavity groove is formed in an upper section of the main die sleeve of the sixth forming die set, two linear spot welding grooves are formed in a bottom surface of the positioning cavity groove, a round rectangular through cavity is formed in the bottom of the positioning cavity groove, the fifth semi-finished product is placed in the positioning cavity groove, the sixth die sleeve downwardly reaches the surface of the fifth semi-finished product and then compresses the fifth semi-finished product, the sixth die ejector pin continues to move downwardly to punch through excess materials between the round rectangular grooves in the upper surface and the lower surface of the fifth semi-finished product, and then the sixth rectangular ejector pin moves upwardly to discharge the waste materials out of the round rectangular through cavity to form the diamond spot welding nut.
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| CN201911098972.8A CN110695303B (en) | 2019-11-12 | 2019-11-12 | Cold heading forming process and cold heading module of diamond spot welding nut |
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| CN201911098972.8A CN110695303B (en) | 2019-11-12 | 2019-11-12 | Cold heading forming process and cold heading module of diamond spot welding nut |
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| CN111940670A (en) * | 2020-07-23 | 2020-11-17 | 宾科汽车紧固件（昆山）有限公司 | Method for forming welded nut |
| CN112743024A (en) * | 2020-12-15 | 2021-05-04 | 福达合金材料股份有限公司 | Sheet-shaped electrical contact forming device and method |
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|---|---|
| CN110695303B (en) | 2024-02-09 |
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