CN113020535B - Cold heading forming module and cold heading forming method of rivet nut - Google Patents
Cold heading forming module and cold heading forming method of rivet nut Download PDFInfo
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- CN113020535B CN113020535B CN202110295599.6A CN202110295599A CN113020535B CN 113020535 B CN113020535 B CN 113020535B CN 202110295599 A CN202110295599 A CN 202110295599A CN 113020535 B CN113020535 B CN 113020535B
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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
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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
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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
- 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
- B21J5/027—Trimming
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Forging (AREA)
Abstract
The invention discloses a cold heading forming module of a rivet nut and a cold heading forming method. The cold heading forming technology designed by the invention adopts various forming dies to process step by step from the material cutting, and finally the rivet nut is formed.
Description
Technical Field
The invention relates to the field of cold heading manufacturing, in particular to a cold heading forming module and a cold heading forming method of a rivet turning nut.
Background
Along with new energy, light weight and dissimilar material connection of automobiles, riveting nuts are rapidly developed, a rivet turning type nut is automatically developed and designed to overcome the defects of the existing rivet nut in application, the rivet turning type nut is applied to the automobile industry at present, but the previous supply is full-machining tool forming supply, so that the material utilization rate is low, the production efficiency is low, the cost is high, the market popularization of products is restricted, and a production and manufacturing method for achieving low cost and high efficiency is needed to be designed for better popularizing the product market.
Disclosure of Invention
The invention aims to provide a cold heading forming module and a cold heading forming method of a rivet nut, which aim to solve the technical defects and the technical requirements which cannot be met in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a turn over cold-heading shaping module of riveting nut, includes feeding mould, sizing die, shaping guide hole mould, shaping octagon mould, shaping flange mould, shaping screw thread unthreaded hole mould, the mould of punching a hole.
Preferably, the shaping die comprises a female die and a male die, the male die of the shaping die comprises a one-position upper punch, a one-position upper punch pad is arranged on the left side of the one-position upper punch, a one-position upper die sleeve is arranged outside the one-position upper punch pad, the female die of the shaping die comprises a one-position lower punch, a one-position lower punch ejector rod is arranged on the right side of the one-position lower punch, a one-position lower die pad is arranged on the outer side of the one-position lower punch ejector rod, and a one-position lower die is arranged on the outer side of the one-position lower punch.
Preferably, the forming guide hole die comprises a female die and a male die, the male die of the forming guide hole die comprises a two-position upper punch, the two-position upper punch is provided with a two-position upper punch pad on the left side, a two-position upper die sleeve is arranged on the outer side of the two-position upper punch pad, the female die of the forming guide hole die comprises a two-position lower punch, a two-position lower punch rod is arranged on the right side of the two-position lower punch, a two-position lower die pad is arranged on the outer side of the two-position lower punch rod, and a two-position lower die is arranged on the outer side of the two-position lower punch.
Preferably, the forming octagonal die comprises a female die and a male die, the forming octagonal die male die comprises a three-position upper punch, a three-position upper punch push pipe is arranged on the outer side of the three-position upper punch, a three-position upper punch stripping ejector pin is arranged on the left side of the three-position upper punch push pipe, a three-position upper punch sliding block is arranged on the left side of the three-position upper punch stripping ejector pin, a three-position upper punch pad is arranged on the left side of the three-position upper punch pad, a three-position upper punch hollow pad is arranged on the left side of the three-position upper punch stripping ejector pin, a three-position upper punch sleeve is arranged on the outer side of the three-position upper punch hollow pad, the forming octagonal die female die comprises a three-position lower punch, a three-position lower punch ejector pin is arranged on the right side of the three-position lower punch ejector pin, a three-position lower die pad is arranged on the outer side of the three-position lower punch.
Preferably, the forming flange die comprises a female die and a male die, the male die of the forming flange die comprises a four-position upper punch, a four-position upper punch core is arranged in the middle of the four-position upper punch, a four-position upper punch pad is arranged on the left side of the four-position upper punch pad, a four-position upper die is arranged on the outer side of the four-position upper punch pad, the forming flange die comprises a four-position lower punch, a four-position lower punch push pipe is arranged on the four-position lower punch, a four-position lower punch push pipe pad is arranged on the right side of the four-position lower punch push pipe, a four-position lower punch stripper thimble is arranged on the right side of the four-position lower punch push pipe pad, a four-position lower punch pad is arranged on the right side of the four-position lower punch small pad, a four-position lower punch pad is arranged on the left side of the four-position lower punch pad, a four-position lower punch pad is arranged on the outer side of the four-position lower punch pad, and a four-position lower die is arranged on the left side of the four-position lower punch pad.
Preferably, the forming threaded finish die comprises a female die and a male die, the male die of the forming threaded finish die comprises a five-position upper punch, a five-position upper punch push pipe is arranged on the outer side of the five-position upper punch, a wife upper punch push pipe pad is arranged on the left side of the five-position upper punch push pipe pad, a five-position upper punch stripping ejector pin is arranged on the left side of the five-position upper punch push pipe pad, a five-position upper punch slider is arranged on the left side of the five-position upper punch stripping ejector pin, a five-position upper die pad is arranged on the outer side of the five-position upper punch slider, a five-position upper punch sleeve is further arranged on the five-position upper punch, and a five-position upper punch pad is arranged on the left side of the five-position upper punch sleeve, the five-position upper punch pad outer side is provided with a five-position upper die sleeve, the forming thread unthreaded hole die female die comprises five-position lower punches, five-position lower punch outer sides are provided with five-position lower punch push pipes, five-position lower punch push pipe right sides are provided with five-position lower punch push pipe pads, five-position lower punch push pipe pad right sides are provided with five-position lower punch stripping ejector pins, five-position lower punch right sides are provided with five-position lower punch small cushion blocks, five-position lower punch small cushion block right sides are provided with five-position lower punch pads, five-position lower punch pad left sides are provided with five-position lower punch sleeves, five-position lower punch sleeve outer sides are provided with five-position lower die pads, and five-position lower die pads are provided with five-position lower dies on the left side.
Preferably, the punching die comprises a female die and a male die, the male die of the punching die comprises a six-position upper punch, a six-position upper punch pad is arranged on the left side of the six-position upper punch, a six-position upper die sleeve is arranged on the outer side of the six-position upper punch pad, the female die of the punching die comprises a six-position lower punch, a six-position lower punch push pipe is arranged on the outer side of the six-position lower punch, a six-position lower punch push pipe pad is arranged on the right side of the six-position lower punch push pipe pad, a six-position lower punch stripper thimble is arranged on the right side of the six-position lower punch pad, a six-position lower die is further arranged on the outer side of the six-position lower punch, a six-position lower punch pad is arranged on the right side of the six-position lower punch pad, and a six-position lower die shell is arranged on the outer side of the six-position lower die.
A cold heading forming method of a rivet nut comprises the following steps:
the method comprises the following steps: cutting the material, namely cutting the material into a specified length by a cutter and a feeding die according to the length of the material required by molding to form a cut material, and then conveying the cut material to a lower station for shaping;
step two: shaping, namely, feeding the cut material to a shaping die opening, driving the cut material into a shaping die female die by a shaping die male die, and then forming a groove and a chamfer by extruding blank deformation to achieve the required shaping shape to prepare for the next station;
step three: forming a guide hole, namely turning over the shaped blank by a clamp, conveying the turned blank to a die opening of a forming guide hole die, driving the shaped blank into a female die of the guide hole die by a male die of the guide hole die, extruding the blank to deform so that the top blank is formed into a guide hole to prepare for forming an octagonal plate of a next station, and simultaneously pressing the bottom blank to form an inner chamfer and an outer chamfer for the bottom blank to prepare for subsequent hexagonal forming;
step four: forming an octagon, horizontally transferring the blank passing through the forming guide hole to a forming octagon die orifice by a clamp, driving the blank of the previous station into a forming octagon die female die by the forming octagon die male die, extruding the blank to deform so that the inside of a top blank is stretched and formed to form the inner diameter of a turned and riveted pipe wall, forming the outside of the turned and riveted octagon pipe wall to form the outer diameter of the turned and riveted pipe wall, and simultaneously keeping the inner chamfer and the outer chamfer of the bottom blank unchanged in a closed die cavity;
step five: the flange forming method comprises the following steps that a formed octagonal blank is horizontally transferred to a forming flange die opening by a clamp, a forming flange die male die punches the blank at the previous station into a forming flange die female die, then a closed die cavity of the male die keeps the inner diameter of a wall of a turned riveting pipe and the outer diameter shape of the wall of the turned riveting octagonal pipe basically unchanged, and the male die and a hexagonal flange closed die cavity of a female die are extruded to enable the blank at the middle part of the blank to be upset, form a material melting groove and a flange, form a hexagonal material between an inner chamfer and an outer chamfer at the bottom, and form a first threaded unthreaded hole at the center part of the bottom;
step six: forming a threaded unthreaded hole, horizontally transferring a blank passing through a formed flange to a die orifice of a formed threaded unthreaded hole die by a clamp, driving the blank at the previous station into a female die of the formed threaded unthreaded hole die by a male die of the formed threaded unthreaded hole die, and then extruding the male die and the female die of the formed threaded unthreaded hole die to form a second threaded unthreaded hole at the wall end of a flange pipe for preparing for punching at the next station, and simultaneously closing a die cavity by the female die to keep the shapes of the flange, the hexagon and the first threaded unthreaded hole unchanged basically;
step seven: and punching, namely horizontally transferring the blank subjected to the formed threaded unthreaded hole to a die opening of a punching die by a clamp, punching the blank at the previous station into a female die of the punching die by a male die of the punching die, shearing and punching the redundant waste by a punching rod of the female die of the punching die, and finally completely forming the whole threaded unthreaded hole, wherein the rest parts do not participate in deformation in the process.
Compared with the prior art, the invention has the following beneficial effects: the cold heading forming technology designed by the invention adopts various forming dies to process step by step from the material cutting, and finally the rivet nut is formed.
Drawings
FIG. 1 is a schematic view of the sizing die of the present invention;
FIG. 2 is a schematic view of a forming guide hole die according to the present invention;
FIG. 3 is a schematic structural view of a forming octagonal die according to the present invention;
FIG. 4 is a schematic structural view of a flange forming die of the present invention;
FIG. 5 is a schematic structural view of a threaded smooth hole forming die according to the present invention;
FIG. 6 is a schematic view of the structure of the punching die of the present invention;
FIG. 7 is a schematic view of the broken material structure of the present invention;
FIG. 8 is a schematic structural diagram of the shaped blank according to the present invention;
FIG. 9 is a schematic structural diagram of the blank after forming the guide hole according to the present invention;
FIG. 10 is a schematic view of the structure of the octagonal shaped blank according to the present invention;
FIG. 11 is a schematic structural view of a blank after forming a flange according to the present invention;
FIG. 12 is a schematic structural diagram of the blank after forming the threaded aperture according to the present invention;
FIG. 13 is a schematic view of a punched blank according to the present invention;
in the figure: 1-cutting the material; 2-groove; 3-chamfering; 4-guiding the hole; 5-chamfering the outer part; 6-inner chamfering; 7-riveting the inner diameter of the pipe wall in a turning manner; 8-riveting the outer diameter of the octagonal tube wall; 9-a melting tank; 10-a flange; 11-hexagonal; 12-a first threaded unthreaded hole; 13-a second threaded unthreaded hole; 14-waste material; 15-threaded unthreaded hole.
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.
Referring to fig. 1-13, the present invention provides a technical solution: the utility model provides a turn over cold-heading shaping module of riveting nut, includes feeding mould, sizing die, shaping guide hole mould, shaping octagon mould, shaping flange mould, shaping screw thread unthreaded hole mould, the mould of punching a hole.
The shaping die comprises a female die and a male die, the male die of the shaping die comprises a one-position upper punch, a one-position upper punch pad is arranged on the left side of the one-position upper punch, a one-position upper die sleeve is arranged outside the one-position upper punch pad, the female die of the shaping die comprises a one-position lower punch, a one-position lower punch ejector rod is arranged on the right side of the one-position lower punch, a one-position lower die pad is arranged on the outer side of the one-position lower punch rod, and a one-position lower die is arranged on the outer side of the one-position lower punch.
The forming guide hole die comprises a female die and a male die, the male die of the forming guide hole die comprises a two-position upper punch, the two-position upper punch is arranged on the left side of the two-position upper punch, a two-position upper punch pad is arranged on the outer side of the two-position upper punch pad, the female die of the forming guide hole die comprises a two-position lower punch, a two-position lower punch push rod is arranged on the right side of the two-position lower punch, a two-position lower punch pad is arranged on the outer side of the two-position lower punch push rod, and a two-position lower die is arranged on the outer side of the two-position lower punch.
The forming octagonal die comprises a female die and a male die, the forming octagonal die male die comprises a three-position upper punch, a three-position upper punch push pipe is arranged on the outer side of the three-position upper punch, a three-position upper punch stripping ejector pin is arranged on the left side of the three-position upper punch stripping ejector pin, a three-position upper punch sliding block is arranged on the left side of the three-position upper punch stripping ejector pin, a three-position upper punch pad is arranged on the left side of the three-position upper punch pad, a three-position upper punch pad is arranged on the left side of the three-position upper punch stripping ejector pin, a three-position lower punch is arranged on the right side of the three-position lower punch ejector pin, a three-position lower punch pad is arranged on the outer side of the three-position lower punch ejector pin, and a three-position lower die is arranged on the outer side of the three-position lower punch.
The forming flange die comprises a female die and a male die, the male die of the forming flange die comprises a four-position upper punch, a four-position upper punch core is arranged in the middle of the four-position upper punch, a four-position upper punch pad is arranged on the left side of the four-position upper punch, a four-position upper punch slide block is arranged on the left side of the four-position upper punch pad, a four-position upper punch pad is arranged on the outer side of the four-position upper punch pad, the forming flange die comprises a four-position lower punch, a four-position lower punch push pipe is arranged on the four-position lower punch, a four-position lower punch push pipe pad is arranged on the right side of the four-position lower punch push pipe, a four-position lower stripper ejector pin is arranged on the right side of the four-position lower punch push pipe pad, a four-position lower punch pad is arranged on the right side of the four-position lower punch small pad, a four-position lower punch sleeve is arranged on the left side of the four-position lower punch pad, and a four-position lower die pad is arranged on the left side of the four-position lower punch pad.
The forming thread unthreaded hole die comprises a female die and a male die, the male die of the forming thread unthreaded hole die comprises a five-position upper punch, a five-position upper punch push pipe is arranged on the outer side of the five-position upper punch, a Wien upper punch push pipe pad is arranged on the left side of the five-position upper punch push pipe pad, a five-position upper punch stripper thimble is arranged on the left side of the five-position upper punch stripper thimble, a five-position upper punch slide block is arranged on the left side of the five-position upper punch slide block, a five-position upper punch pad is arranged on the outer side of the five-position upper punch slide block, a five-position upper punch sleeve is arranged on the left side of the five-position upper punch sleeve, a five-position upper punch sleeve is arranged on the outer side of the five-position upper punch pad, the female die of the forming thread unthreaded hole die comprises a five-position lower punch, a five-position lower punch is arranged on the outer side of the five-position lower punch, a five-position lower punch is provided with a five-position lower punch, a five-position lower punch pad is arranged on the right side of the five-position lower punch sleeve, a five-position lower punch pad is arranged on the outer side of the five-position lower punch sleeve, a five-position lower punch pad, and a five-position lower punch pad is arranged on the left side of the five-position lower punch sleeve.
The punching die comprises a female die and a male die, the male die of the punching die comprises a six-position upper punch, a six-position upper punch pad is arranged on the left side of the six-position upper punch, a six-position upper die sleeve is arranged on the outer side of the six-position upper punch pad, the female die of the punching die comprises a six-position lower punch, a six-position lower punch push pipe is arranged on the outer side of the six-position lower punch, a six-position lower punch push pipe pad is arranged on the right side of the six-position lower punch push pipe, a six-position lower punch stripping ejector pin is arranged on the right side of the six-position lower punch pad, a six-position lower die is further arranged on the outer side of the six-position lower punch, a six-position lower die limiting pad is arranged between the six-position lower die and the six-position lower punch pad, and a six-position lower die shell is arranged on the outer side of the six-position lower die.
A cold heading forming method of a rivet nut comprises the following steps:
the method comprises the following steps: cutting the material, namely cutting the material into a specified length by a cutter and a feeding die according to the length of the material required by molding to form a cut material 1, and then conveying the cut material 1 to a lower station for shaping;
step two: shaping, namely feeding the cut material 1 to a shaping die orifice, driving the cut material 1 into a shaping die female die by a shaping die male die, and then forming a groove 2 and a chamfer 3 by extruding blank deformation to achieve a required shaping shape to prepare for the next station;
step three: forming a guide hole, namely turning over the shaped blank by a clamp, conveying the turned blank to a die orifice of a forming guide hole die, driving the shaped blank into a female die of the guide hole die by a male die of the guide hole die, extruding the blank to deform so that the top blank is formed into a guide hole 4 to prepare for forming an octagonal plate of a next station, and simultaneously pressing the bottom blank to form an inner chamfer 6 and an outer chamfer 5 on the bottom blank to prepare for subsequent hexagonal forming;
step four: forming an octagonal die, horizontally transferring the blank passing through the forming guide hole to a die orifice of the forming octagonal die by a clamp, driving the blank of the previous station into a female die of the forming octagonal die by a male die of the forming octagonal die, extruding the blank to deform so that the inside of the top blank is stretched to form the inner diameter 7 of the wall of the turned riveted pipe, and the outside of the wall of the turned riveted octagonal pipe is formed to be the outer diameter 8, and simultaneously keeping the inner chamfer 6 and the outer chamfer 5 of the bottom blank unchanged in a closed die cavity;
step five: the flange forming method comprises the following steps that a formed octagonal blank is horizontally transferred to a forming flange die opening by a clamp, a forming flange die male die punches the blank at the previous station into a forming flange die female die, then the closed die cavity of the male die keeps the inner diameter 7 of the wall of a turned riveting pipe and the outer diameter 8 of the wall of the turned riveting octagonal pipe unchanged basically, and meanwhile, the blank is extruded with a hexagonal flange closed die cavity of a female die to enable the blank at the middle part to be upset to form a molten material groove 9 and a flange 10, a material forming hexagon 11 is arranged between an inner chamfer 6 and an outer chamfer 5 at the bottom, and a first threaded unthreaded hole 12 is formed at the center part of the bottom;
step six: forming a threaded unthreaded hole, horizontally transferring a blank passing through a formed flange to a die orifice of a formed threaded unthreaded hole die by a clamp, driving the blank at the previous station into a female die of the formed threaded unthreaded hole die by a male die of the formed threaded unthreaded hole die, and then extruding the male die and the female die of the formed threaded unthreaded hole die to form a second threaded unthreaded hole 13 at the wall end of a flange pipe for preparing for punching at the next station, and simultaneously closing a die cavity by the female die to keep the shapes of the flange 10, the hexagon 11 and the first threaded unthreaded hole 12 basically unchanged;
step seven: and (3) punching, namely horizontally transferring the blank subjected to the formed threaded unthreaded hole to a punching die orifice by a clamp, punching the blank at the previous station into a punching die female die by a punching die male die, shearing and punching the redundant waste 14 by a punching rod of the punching die female die, and finally completely forming the whole threaded unthreaded hole 15, wherein the rest parts do not participate in deformation in the process.
For ease of description, the orientations referred to above are now specified as follows: the up, down, left, right, and front-back directions described above coincide with the up, down, left, right, and front-back directions of the projection relation of fig. 1 itself.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (7)
1. A cold heading forming method of a rivet nut is characterized by comprising the following steps:
the method comprises the following steps: cutting the material, namely cutting the material into a specified length by a cutter and a feeding die according to the length of the material required by molding to form a cut material (1), and then conveying the cut material to a lower station for shaping;
step two: shaping, namely feeding the cut material (1) to a shaping die orifice, driving the cut material (1) into a shaping die female die by a shaping die male die, and then forming a groove (2) and a chamfer (3) by extruding blank deformation to achieve a required shaping shape to prepare for the next station;
step three: forming a guide hole, namely turning over the shaped blank by a clamp, conveying the turned blank to a die orifice of a forming guide hole die, driving the shaped blank into a female die of the forming guide hole die by a male die of the forming guide hole die, extruding the blank to deform so that the top blank is formed into a guide hole (4) to prepare for forming an octagonal plate of a next station, and simultaneously pressing the bottom blank to form an inner chamfer (6) and an outer chamfer (5) on the bottom blank to prepare for subsequent hexagonal forming;
step four: forming an octagon, horizontally transferring the blank passing through the forming guide hole to a forming octagon die orifice by a clamp, driving the blank at the previous station into a forming octagon die female die by the forming octagon die male die, extruding the blank to deform so that the inner part of the top blank is stretched, formed and riveted to form the inner diameter (7) of the tube wall of the turned-riveted tube, and the outer part of the top blank is formed and riveted to form the outer diameter (8) of the tube wall of the turned-riveted octagon, and simultaneously keeping the inner chamfer (6) and the outer chamfer (5) of the bottom blank unchanged in a closed die cavity;
step five: the flange forming method comprises the steps that a formed octagonal blank is horizontally transferred to a forming flange die opening by a clamp, a forming flange die male die punches the blank at the previous station into a forming flange die female die, then a closed die cavity of the male die keeps the inner diameter (7) of a turned-riveted pipe wall and the outer diameter (8) of the turned-riveted octagonal pipe wall basically unchanged in shape, and meanwhile, the formed flange male die and a closed die cavity of a female die are extruded to enable a material upsetting forming material groove (9) and a flange (10) at the middle part of the blank, a material forming hexagon (11) between an inner chamfer (6) and an outer chamfer (5) at the bottom, and a first threaded unthreaded hole (12) is formed at the center part of the bottom;
step six: forming a threaded unthreaded hole, horizontally transferring a blank passing through a forming flange to a die orifice of a forming threaded unthreaded hole die by a clamp, driving the blank at the previous station into a female die of the forming threaded unthreaded hole die by a male die of the forming threaded unthreaded hole die, and then extruding the male die and the female die of the forming threaded unthreaded hole die to form a second threaded unthreaded hole (13) at the wall end of a flange pipe for punching at the next station, and simultaneously closing a die cavity by the female die to keep the shapes of the flange (10), the hexagon (11) and the first threaded unthreaded hole (12) unchanged basically;
step seven: and (3) punching, namely horizontally transferring the blank subjected to the formed threaded unthreaded hole to a die opening of a punching die by a clamp, punching the blank at the previous station into a female die of the punching die by a male die of the punching die, shearing and punching the redundant waste (14) by a punching rod of the female die of the punching die, and finally completely finishing the integral forming of the threaded unthreaded hole (15), wherein the rest parts do not participate in deformation in the process.
2. The cold heading forming method for the rivet nut is characterized in that the shaping die comprises a female die and a male die, the male die of the shaping die comprises a one-position upper punch, an upper punch pad is arranged on the left side of the one-position upper punch, an upper die sleeve is arranged outside the one-position upper punch pad, the female die of the shaping die comprises a lower punch, a lower punch push rod is arranged on the right side of the one-position lower punch, a lower die pad is arranged on the outer side of the one-position lower punch push rod, and a lower die is arranged on the outer side of the one-position lower punch.
3. The cold heading forming method of the rivet turning nut as claimed in claim 1, wherein the forming guide hole die comprises a female die and a male die, the male die of the forming guide hole die comprises a two-position upper punch, a two-position upper punch pad is arranged on the left side of the two-position upper punch, a two-position upper die sleeve is arranged on the outer side of the two-position upper punch pad, the female die of the forming guide hole die comprises a two-position lower punch, a two-position lower punch rod is arranged on the right side of the two-position lower punch, a two-position lower die pad is arranged on the outer side of the two-position lower punch rod, and a two-position lower die is arranged on the outer side of the two-position lower punch.
4. The cold heading forming method of the rivet turning nut according to claim 1, wherein the formed octagonal die comprises a female die and a male die, the formed octagonal die male die comprises a three-position upper punch, a three-position upper punch push pipe is arranged on the outer side of the three-position upper punch, a three-position upper punch stripper thimble is arranged on the left side of the three-position upper punch push pipe, a three-position upper punch slide block is arranged on the left side of the three-position upper punch stripper thimble, a three-position upper punch pad is arranged on the left side of the three-position upper punch pad, a three-position upper punch sleeve is arranged on the outer side of the three-position upper punch pad, the formed octagonal die female die comprises a three-position lower punch, a three-position lower punch push rod is arranged on the right side of the three-position lower punch pad, a three-position lower die pad is arranged on the outer side of the three-position lower punch push rod, and a three-position lower die is arranged on the outer side of the three-position lower punch.
5. The cold heading forming method of the rivet nut is characterized in that the forming flange die comprises a female die and a male die, the male die of the forming flange die comprises a four-position upper punch, a four-position upper punch core is arranged in the middle of the four-position upper punch, a four-position upper punch pad is arranged on the left side of the four-position upper punch, a four-position upper die is arranged on the outer side of the four-position upper punch pad, a four-position upper punch slide block is arranged on the left side of the four-position upper punch core, a four-position upper punch pad is arranged on the outer side of the four-position upper punch slide block, the female die of the forming flange die comprises a four-position lower punch, a four-position lower punch pipe is arranged on the four-position lower punch, a four-position lower punch pipe pad is arranged on the right side of the four-position lower punch pipe, a four-position lower punch stripper thimble is arranged on the right side of the four-position lower punch pad, a four-position lower punch sleeve is arranged on the left side of the four-position lower punch pad, a four-position lower punch pad is arranged on the outer side of the four-position lower punch pad, and a lower punch lower die is arranged with a lower die.
6. The cold heading forming method for the rivet nut according to claim 1, wherein the forming threaded hole die comprises a female die and a male die, the male die of the forming threaded hole die comprises a five-position upper punch, a five-position upper punch push pipe is arranged on the outer side of the five-position upper punch, a five-position upper punch push pipe pad is arranged on the left side of the five-position upper punch push pipe pad, a five-position upper punch stripping ejector pin is arranged on the left side of the five-position upper punch stripping ejector pin, a five-position upper punch slide block is arranged on the outer side of the five-position upper punch slide block, a five-position upper punch sleeve is further arranged on the five-position upper punch, a five-position upper punch pad is arranged on the left side of the five-position upper punch sleeve, the five-position upper punch pad outer side is provided with a five-position upper die sleeve, the forming thread unthreaded hole die female die comprises five-position lower punches, five-position lower punch outer sides are provided with five-position lower punch push pipes, five-position lower punch push pipe right sides are provided with five-position lower punch push pipe pads, five-position lower punch push pipe pad right sides are provided with five-position lower punch stripping ejector pins, five-position lower punch right sides are provided with five-position lower punch small cushion blocks, five-position lower punch small cushion block right sides are provided with five-position lower punch pads, five-position lower punch pad left sides are provided with five-position lower punch sleeves, five-position lower punch sleeve outer sides are provided with five-position lower die pads, and five-position lower die pads left sides are provided with five-position lower dies.
7. The cold heading forming method for the rivet turning nut according to claim 1, wherein the punching die comprises a female die and a male die, the male die comprises a six-position upper punch, a six-position upper punch pad is arranged on the left side of the six-position upper punch, a six-position upper die sleeve is arranged on the outer side of the six-position upper punch pad, the female die comprises a six-position lower punch, a six-position lower punch push pipe is arranged on the outer side of the six-position lower punch, a six-position lower punch push pipe pad is arranged on the right side of the six-position lower punch push pipe pad, a six-position lower punch stripping ejector pin is arranged on the right side of the six-position lower punch pad, a six-position lower punch pad is arranged on the right side of the six-position lower punch pad, a six-position lower die limiting pad is arranged between the six-position lower die pad, and a six-position lower die shell is arranged on the outer side of the six-position lower die.
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| CN202110295599.6A CN113020535B (en) | 2021-03-19 | 2021-03-19 | Cold heading forming module and cold heading forming method of rivet nut |
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| CN202110295599.6A CN113020535B (en) | 2021-03-19 | 2021-03-19 | Cold heading forming module and cold heading forming method of rivet nut |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113546981A (en) * | 2021-08-13 | 2021-10-26 | 常州市胜彪标准件模具有限公司 | Pipe joint machining process method |
| CN114810788A (en) * | 2022-04-01 | 2022-07-29 | 上海奥达科股份有限公司 | Anti-follow-up rotation combined nut and forming process thereof |
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