CN111872295B - Cold heading module and cold heading process for manufacturing middle bolt of engine - Google Patents
Cold heading module and cold heading process for manufacturing middle bolt of engine Download PDFInfo
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- CN111872295B CN111872295B CN202010804469.6A CN202010804469A CN111872295B CN 111872295 B CN111872295 B CN 111872295B CN 202010804469 A CN202010804469 A CN 202010804469A CN 111872295 B CN111872295 B CN 111872295B
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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
- 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
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
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Abstract
The invention discloses a cold heading module and a cold heading process for manufacturing a mid-bolt of an engine, and relates to the technical field of cold heading.
Description
Technical Field
The invention relates to the technical field of cold heading, in particular to a cold heading module and a cold heading process for manufacturing a middle bolt of an engine.
Background
The cold heading process is one of the pressure processing new processes of less or no cutting metal, and utilizes the plastic deformation produced by metal under the action of external force and utilizes the die to redistribute and transfer the volume of the metal so as to form the required part or blank.
Because cold heading has the advantages of high production efficiency, raw material conservation and the like, more and more parts are required to be machined and formed at one time, for example, bolts are arranged in an engine, the traditional process is bar turning, and the process is complicated, the efficiency is low, the cost is high and the strength is low.
For example, patent document CN109967680A discloses a bolt cold heading die set including a first die set, a second die set, a third die set and a fourth die set, all of which are mounted on a cold heading machine. According to the invention, four groups of dies, namely the first die set, the second die set, the third die set and the fourth die set, are arranged to sequentially perform cold heading forming processing on the blank of the bolt, the bolt manufactured by the die set has higher surface smoothness, and meanwhile, the bolt manufactured by the die set through the cold heading process does not need to be cooled and does not generate later cooling deformation, so that the bolt has higher precision and the production efficiency of the cold heading process is higher, but the die set can only be used for processing common bolts.
Patent document CN109108203A discloses a ball stud cold heading forming die and forming process, one die can punch a cold heading embryonic-shaped connecting slot hole on a cylindrical bar material pre-forming piece g, punch a cold heading embryonic-shaped connecting column on the cylindrical bar material pre-forming piece g, and punch a cold heading embryonic-shaped connecting seat to form a pre-forming piece a; the two dies can trim the prototype connecting slot on the preformed piece a and punch and cold-upset the prototype threaded column to form a preformed piece b; the three dies can punch and cold-upset the preformed piece b to form a prototype bolt head and a prototype reinforcing rib, and trim, punch and cold-upset the prototype connecting base to form a preformed piece c; the four dies can finish, punch and cold upset the prototype reinforcing rib on the preformed piece c to form the reinforcing rib, and perform punching and cold upset on the prototype bolt head to finish the bolt head to form a preformed piece d; the five dies can finish, punch and cold-upset the rudiment connecting column to form the connecting column and punch and cold-upset a ball head to form a finished product e, and the die and the forming process can only be used for processing ball head bolts;
although the above patent documents CN109967680A and CN109108203A disclose a cold heading die dedicated to processing a common bolt and a ball stud, respectively, the common bolt and the ball stud have different structural shapes, and therefore, a set of die is required to be specially manufactured.
For example, patent document CN110280704A discloses a cold heading module for manufacturing a shock absorber sleeve, which comprises a shear die, a hollow through hole and a shear knife, wherein the shear die is adjacently provided with an ejection shell and an ejection rod; the cold heading module for manufacturing the shock absorber sleeve further comprises a first cold heading die, a second cold heading die, a third cold heading die, a fourth cold heading die, a fifth cold heading die, a sixth cold heading die and a conveying clamp which are arranged on a cold heading machine, the cold heading process for manufacturing the shock absorber sleeve comprises the steps of providing a wire for manufacturing the shock absorber sleeve, cutting off and forming a wire blank, forming a first semi-finished product blank of which the cold heading is a forming arc at one end, punching a positioning center hole, punching a center inner hole, shaving through inner hole waste materials, and shrinking a rod part, wherein the middle drum-shaped pre-forming and the middle drum-shaped ball are upset and extruded to form a shock absorber sleeve finished product. Although the above-mentioned patent adopts automated production mode, effectively improves production efficiency, material utilization and intensity, above-mentioned cold-heading module and cold-heading technology are only applied to the telescopic of bumper shock absorber, can not make other products, like put bolt etc. in, consequently, on prior art's basis, need develop a cold-heading mould and cold-heading technology that are used for making the bolt put in the engine specially.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the cold heading module and the cold heading process for manufacturing the middle-placed bolt of the engine are provided to solve the problems of complex process, high cost, low efficiency and low product strength of the manufacturing method of the middle-placed bolt of the engine in the prior art.
On one hand, the technical scheme adopted by the invention for solving the technical problems is as follows: the cold heading module for manufacturing the middle bolt of the engine comprises:
the second cold heading die comprises a second stamping die unit and a second main die unit, and the second main die unit comprises a second main die shell, a second main die core and a second main die ejector pin; the second main mould shell is of a hollow structure, and a second main mould core is arranged in the second main mould shell;
the upper end of the through hole of the second main die core is cylindrical, the lower end of the through hole of the second main die core is regular hexagonal, and the second main die thimble penetrates through the second main die core; the diameter of the second main die ejector pin is smaller than that of the through hole of the second main die core; the second main die unit also comprises a second main die guide sleeve, a second main die unloading sleeve rear cushion, a second main die three ejector pin, a second main die three needle seat and a second main die three needle cushion; the second main die guide sleeve is positioned below the second main die core, the second main die discharging sleeve is sleeved on the periphery of the middle end of the second main die ejector pin, the second main die third needle seat wraps the periphery of the lower end of the second main die ejector pin, a second main die third needle pad is arranged below the second main die third needle seat, and a second main die discharging sleeve rear pad and a second main die ejector pin are arranged below the second main die discharging sleeve; the second cold-heading mould is used for cold-heading the first semi-manufactured goods blank into regular hexagon and upsetting out the hole, forms the second semi-manufactured goods blank, and the second semi-manufactured goods blank includes pole portion and head, pole portion and head are connected, the head profile is regular hexagon, the head is provided with the hole, pole portion is cylindrical.
Preferably, the second die unit comprises a second die shell provided with a hollow structure, a second punch cushion block and a second punch rod are arranged in the second die shell, and a second die back cushion is arranged above the second die shell; and the second punching rod is propped against the second punch cushion block and penetrates through the second punching die shell.
Preferably, the die further comprises a third cold heading die for upsetting the rod part of the overturned second semi-finished blank to form a third semi-finished blank;
the third cold heading die comprises a third punching die unit and a third main die unit; the third die unit comprises a third die shell and a third die unloading sleeve, the third die unloading sleeve penetrates through the third die shell, the third die shell is of a hollow structure, a third die cushion block is arranged above the third die cushion block, a third die cushion block is arranged inside a third die rear cushion, a third die third ejector pin is arranged below the third die cushion block, and a third die bar is wrapped by the third die third needle seat;
the third main die unit comprises a third main die shell and a third main die thimble, and a third main die kernel and a third main die cushion block A are sequentially arranged in the third main die shell from top to bottom; the third main die kernel and the third main die cushion block A are provided with through holes, and the third main die thimble penetrates through the through holes of the third main die kernel and the third main die cushion block A.
Preferably, the third main mold unit further includes a third main mold pad B and a third main mold pad C, the third main mold pad B is located below the third main mold housing, and the third main mold pad C is located below the third main mold ejector pin; the diameter of the through hole of the third main die core is smaller than that of the through hole of the second main die core.
Preferably, the cold heading die is used for cold heading a flange below the head part of the third semi-finished blank to form a fourth semi-finished blank;
the fourth cold heading die comprises a fourth die unit and a fourth main die unit, and the fourth die unit comprises a fourth die shell and a fourth die unloading sleeve; a fourth die rear cushion and a fourth die third cushion are arranged in the fourth die shell, the fourth die third cushion is positioned below the fourth die rear cushion, a fourth die cushion block is arranged in the fourth die rear cushion, a fourth die third needle seat is arranged below the fourth die third cushion, a fourth punch rod is wrapped in a through hole of the fourth die third needle seat, a fourth die discharging sleeve penetrates through a through hole of the fourth die shell, and the fourth die discharging sleeve is sleeved on the periphery of the fourth punch rod;
the fourth main die unit comprises a fourth main die shell and a fourth main die ejector pin; a fourth main die kernel and a fourth main die cushion block A are sequentially arranged in the fourth main die shell from top to bottom; the fourth main mould shell and the fourth main mould cushion block A are of hollow structures, and the fourth main mould thimble penetrates through the hollow structures of the fourth main mould shell and the fourth main mould cushion block A.
Preferably, the fourth main mold unit further includes a fourth main mold pad B and a fourth main mold pad C, and the fourth main mold pad B is located below the fourth main mold shell; and the fourth main die cushion block C is positioned below the fourth main die thimble.
Preferably, the cold heading die further comprises a fifth cold heading die, and the fifth cold heading die is used for cold heading the inner hole of the fourth semi-finished blank into a deep hole to form a fifth semi-finished blank;
the fifth cold heading die comprises a fifth die unit and a fifth main die unit, the fifth die unit comprises a fifth die shell, a fifth punch rod is wrapped in the fifth die shell, a fifth die cushion block B is arranged above the fifth die shell, fifth ejector rods are symmetrically arranged on the inner side wall of the fifth die cushion block B, a spring is sleeved on the periphery of the fifth ejector rod, a fifth die cushion block A is arranged in the fifth die shell, the fifth ejector rod penetrates through the fifth die cushion block A, a fifth die push plate is arranged below the fifth die shell, a fifth die unloading sleeve is arranged on the fifth die push plate, and the fifth die unloading sleeve is sleeved on the fifth punch rod;
the fifth main die unit comprises a fifth main die shell, and a fifth main die kernel and a fifth main die cushion block A are sequentially arranged in the fifth main die shell from top to bottom; the fifth main die kernel and the fifth main die cushion block A are of hollow structures, and fifth main die ejector pins are arranged in the hollow structures of the fifth main die kernel and the fifth main die cushion block A.
Preferably, the fifth main mold unit further includes a fifth main mold pad B and a fifth main mold pad C; and the fifth main mold cushion block B is positioned below a fifth main mold shell, and the fifth main mold cushion block C is positioned below a fifth main mold thimble.
Preferably, the sixth cold heading die is further included, and is used for cold heading the deep hole of the fifth semi-finished blank into a through hole to form a finished product of the engine mid-bolt;
the sixth cold heading die comprises a sixth punching die unit and a sixth main die unit, and the sixth punching die unit comprises a sixth punching die shell; a sixth stamping rod is wrapped in the sixth stamping die shell, a sixth stamping die cushion block B is arranged above the sixth stamping die shell, sixth ejector rods are symmetrically arranged on the inner side wall of the sixth stamping die cushion block B, springs are sleeved on the periphery of the sixth ejector rods, a sixth stamping die cushion block A is arranged in the sixth stamping die shell, and the sixth ejector rods penetrate through the sixth stamping die cushion block A; a sixth stamping die push plate is arranged below the sixth stamping die shell, a sixth stamping die discharging sleeve is arranged on the sixth stamping die push plate, and the sixth stamping die discharging sleeve is sleeved on a sixth stamping rod;
the sixth main die unit comprises a sixth main die shell, and a sixth main die front core, a sixth main die guide sleeve and a sixth main die cushion block are sequentially arranged in the sixth main die shell from top to bottom; the sixth main die cushion block is located below the sixth main die guide sleeve, the sixth main die front core is of a hollow structure, a sixth main die ejector pin and a sixth main die ejector rod are wrapped in the hollow structure of the sixth main die front core, and the sixth main die ejector pin is located at the rear end of the sixth main die ejector rod.
Preferably, the first cold heading die is used for cold heading the wire rod blank into a first semi-finished blank with one end in a circular arc shape;
the first cold heading die comprises a first punching die unit and a first main die unit;
the first die unit comprises a first die shell, a first punch cushion block and a first punch rod are arranged in the die shell, the first punch rod is located below the first punch cushion block, and a first die rear pad is arranged above the first die shell;
the first main die unit comprises a first main die shell, and a first main die kernel and a first main die cushion block A are sequentially arranged in the first main die shell from top to bottom; the first main die shell is characterized in that a first main die cushion block B is arranged below the first main die shell, the first main die kernel and the first main die cushion block A are of hollow structures, first main die ejector pins are sleeved in the hollow structures of the first main die kernel and the first main die cushion block A, and a first main die cushion block C is arranged below the first main die ejector pin 1.
Preferably, the wire rod blank forming device further comprises a shearing die and an ejection die, wherein the shearing die comprises a shearing die and a pair of scissors, the shearing die is provided with a hollow through hole and used for assembling the wire rod blank, and the pair of scissors is positioned above the shearing die and used for shearing the wire rod blank to form a wire rod blank for manufacturing a middle bolt; the ejection die comprises an ejection die shell and an ejection rod, the ejection die shell is arranged adjacent to the shearing die and is provided with a hollow cavity, the ejection rod is located in the hollow cavity and is connected through a sliding chain, and a sheared wire blank for manufacturing a middle bolt is ejected.
Preferably, the conveying mechanism is used for conveying the cut wire rod blank for manufacturing the middle bolt to a first cold heading die, conveying the first semi-finished blank to a second cold heading die, turning over and conveying the second semi-finished blank to a third cold heading die, conveying the third semi-finished blank to a fourth cold heading die, conveying the fourth semi-finished blank to a fifth cold heading die, conveying the fifth semi-finished blank to a sixth cold heading die, and conveying the finished product of the middle bolt of the engine to a finished product rack.
Preferably, the cold heading module for manufacturing the bolt in the engine is characterized in that the conveying mechanism is a clamp.
Preferably, in the cold heading die set for manufacturing the bolt in the engine, the wire blank is in a cylindrical shape.
In another aspect, the invention provides a cold heading process for manufacturing a mid-bolt of an engine, which comprises the following steps:
s1, processing a wire blank prepared in advance into a wire blank for manufacturing a middle bolt through a shearing die and an ejection die;
s2, the wire rod blank processed in the step S1 is conveyed to a first cold heading die by a conveying mechanism, and the wire rod blank is cold headed into a first semi-finished blank with one end being in an arc shape;
s3, the conveying mechanism conveys the first semi-finished blank obtained in the step S2 to a second cold heading die, and the head of the first semi-finished blank is subjected to cold heading to form a regular hexagon and an inner hole to form a second semi-finished blank; the second semi-finished blank comprises a rod part and a head part, the rod part is connected with the head part, the outline of the head part is a regular hexagon, the head part is provided with an inner hole, and the rod part is cylindrical;
s4, turning over the second semi-finished blank obtained in the step S3 by the aid of a conveying mechanism, conveying the second semi-finished blank to a third cold heading die, and upsetting a rod of the second semi-finished blank to be thin to form a third semi-finished blank;
s5, the third semi-finished blank in the step S4 is conveyed to a fourth cold heading die by a conveying mechanism, and a flange is cold headed below the head of the third semi-finished blank to form a fourth semi-finished blank;
s6, the fourth semi-finished blank in the step S5 is transferred to a fifth cold heading die by a transfer mechanism, and an inner hole of the fourth semi-finished blank is subjected to cold heading to form a deep hole, so that a fifth semi-finished blank is formed;
and S7, the conveying mechanism conveys the fifth semi-finished blank obtained in the step S6 to a sixth cold heading die, and the inner hole of the fifth semi-finished blank is subjected to cold heading to form a through hole, so that a finished product of the engine center bolt is formed.
The invention has the advantages that the six cold heading dies are used for carrying out cold heading forming on the wire rod blank for six times, the material utilization rate is improved, the cost is reduced, the production efficiency is improved, in addition, when the cold heading is carried out on the metal material, the metal material can generate proper plastic deformation, and the strength of the metal material can be increased compared with the one-time upset extrusion of an oil pressure process.
The invention provides a cold heading module and a cold heading process special for manufacturing a mid-bolt of an engine, and aims to solve the problems of complex process, high cost, low efficiency and low product strength of a manufacturing method of the mid-bolt of the engine in the prior art.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is an assembly view of a cold heading die set for manufacturing mid-bolt in an engine;
FIG. 2 is a schematic structural view of a first cold-heading die;
FIG. 3 is a schematic structural view of a second cold-heading die;
FIG. 4 is a schematic structural view of a third cold-heading die;
FIG. 5 is a schematic structural view of a fourth cold-heading die;
FIG. 6 is a schematic structural view of a fifth cold-heading die;
FIG. 7 is a schematic structural view of a sixth cold-heading die;
FIG. 8 is a schematic view of a cold heading process for manufacturing a mid-bolt of an engine;
1 is a first cold heading die, 2 is a second cold heading die, 3 is a third cold heading die, 4 is a fourth cold heading die, 5 is a fifth cold heading die, 6 is a sixth cold heading die, 7 is a conveying mechanism, 8 is scissors, 9 is a shear die, 10 is a material ejecting rod, 11 is an ejecting die shell, 0000 is a wire blank for manufacturing a middle bolt, 1000 is a first semi-finished blank, 2000 is a second semi-finished blank, 3000 is a third semi-finished blank, 4000 is a fourth semi-finished blank, 5000 is a fifth semi-finished blank, and 6000 is a finished product of an engine bolt;
1100: a first die shell; 1110: a first ram block; 1120: a first punch bar; 1130: a first die back pad; 1140: a first master mold housing; 1150: a first main mold thimble; 1160: a main die cushion block B; 1170: a first main mold cushion block C; 1180: a first main mold core; 1190: a first main die cushion block A;
2100: a second die shell; 2110: a second ram block; 2120: a second punch bar; 2130: a second die back pad; 2140: a second master mold housing; 2150: a second main mold core; 2160: a second main mold guide sleeve; 2170: a third needle seat of the second main mold; 2180: a second main mold unloading sleeve; 2190: a second main die three-needle pad; 2200: a second main die is sleeved with a rear cushion; 2210: a third thimble of the second main die; 2220: a second main mold thimble;
3100: a third die shell punching; 3110: a third die with three needle pads; 3120: a third die back pad; 3130: a third die pad; 3140: a third punch die with a third needle seat; 3150: a third stamping bar; 3160: a third die unloading sleeve; 3170: a third thimble of the third die; 3180: a third master mold housing; 3190: a third main mold core; 3200: a third main die cushion block A; 3210: a third main die cushion block B; 3220: a third main die thimble; 3230: a third main die cushion block C;
4100: a fourth die shell; 4110: a fourth die with a third pincushion; 4120: a fourth die back pad; 4130: a fourth die pad; 4140: a fourth punch die third needle seat; 4150: a fourth stamping bar; 4160: a fourth die unloading sleeve; 4170: a fourth die three thimble; 4180: a fourth master mold housing; 4190: a fourth main mold core; 4200: a fourth main die cushion block A; 4210: a fourth main die cushion block B; 4220: a fourth main die thimble; 4230: a fourth main die cushion block C;
5100: a fifth punching mould shell; 5110: a fifth stamping bar; 5120: a fifth die pad A; 5130: a fifth ejector rod; 5140: a first spring; 5150: a fifth die pad B; 5160: a fifth die push plate; 5170: a fifth die unloading sleeve; 5180: a fifth master mold housing; 5190: a fifth main mold core; 5200: a fifth main die cushion block A; 5210: a fifth main die cushion block B; 5220: a fifth main mold thimble; 5230: a fifth main mold cushion block C;
6100: a sixth die shell; 6110: a sixth stamping bar; 6120: a sixth die pad A; 6130: a sixth ejector rod; 6140: a second spring; 6150: a sixth die pad B; 6160: a sixth die push plate; 6170: a sixth die unloading sleeve; 6180: a sixth master mold housing; 6190: a sixth master mold front core; 6200: a sixth master die guide sleeve; 6210: a sixth main die cushion block; 6220: a sixth main die thimble; 6230: and a sixth master mold ejector rod.
Detailed Description
It is to be understood that the terms "upper," "lower," "front," "back," "inner," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting.
The terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
[ example 1 ]
As shown in fig. 1, the cold-heading module for manufacturing the mid-bolt in the engine comprises a first cold-heading die 1, a second cold-heading die 2, a third cold-heading die 3, a fourth cold-heading die 4, a fifth cold-heading die 5 and a sixth cold-heading die 6; the first cold heading die 1 is used for cold heading a wire blank 0000 for manufacturing a middle bolt into a first semi-finished blank 1000 with one end in an arc shape; the second cold heading die 2 is used for cold heading the head of the first semi-finished blank 1000 into a regular hexagon and heading an inner hole to form a second semi-finished blank 2000; a third cold heading die 3 for upsetting the rod portion of the turned second semi-finished blank 2000 to form a third semi-finished blank 3000; a fourth cold-heading die 4 for cold-heading a flange below the head of the third semi-finished blank 3000 to form a fourth semi-finished blank 4000; the fifth cold heading die 5 is used for cold heading the inner hole of the fourth semi-finished blank 4000 into a deep hole to form a fifth semi-finished blank 5000; a sixth cold heading die 6, which is used for cold heading the inner hole of the fifth semi-finished blank 5000 into a through hole to form an engine mid-bolt finished product 6000;
as a preferred embodiment, the cold heading die set provided by the invention further comprises a shearing die 8 and an ejection die 9, wherein the shearing die 8 comprises a shearing die 10 and a pair of scissors 11, the shearing die 10 is provided with a through hole for assembling a wire blank, and the pair of scissors 11 is positioned above the shearing die 10 and used for shearing the wire blank to form a wire blank 0000 for manufacturing a middle bolt; the ejection die 9 comprises an ejection die shell 12 and an ejection rod 13, the ejection die shell 12 is arranged adjacent to the shearing die 10 and is provided with a hollow cavity, and the ejection rod 13 is located in the hollow cavity and connected through a sliding chain to eject a sheared wire blank 0000 for manufacturing a middle bolt.
In a preferred embodiment, the cold heading die set provided by the invention further comprises a conveying mechanism 7, which is used for conveying the cut wire blank 0000 for manufacturing a center bolt to the first cold heading die 1, conveying the first semi-finished blank 1000 to the second cold heading die 2, conveying the second semi-finished blank 2000 to the third cold heading die 3, conveying the third semi-finished blank 3000 to the fourth cold heading die 4, conveying the fourth semi-finished blank 4000 to the fifth cold heading die 5, conveying the fifth semi-finished blank 5000 to the sixth cold heading die 6, and conveying the engine center bolt finished product 6000 to a finished product rack.
The six cold heading dies are used for carrying out cold heading forming on the wire rod blank for six times to obtain the middle bolt for the engine, and the cold heading die set is not like a cold heading die set for manufacturing the shock absorber sleeve provided by patent document CN110280704A, although the six cold heading dies are also used for manufacturing the shock absorber sleeve, the six cold heading dies are special dies and cannot manufacture the middle bolt, so that the cold heading die set and the cold heading process for manufacturing the middle bolt for the engine are provided, the material utilization rate is improved, the cost is reduced, the production efficiency is improved, when the metal material is subjected to cold heading, the metal material can generate appropriate plastic deformation, and the strength of the metal material can be increased compared with one-time upsetting extrusion of an oil pressure process.
Specifically, as shown in fig. 2, the first cold-heading die provided by the present invention includes a first die unit and a first main die unit;
the first die unit comprises a first die shell 1100, a first punch pad block 1110 and a first punch bar 1120 are arranged in the first die shell 1100, the first punch bar 1120 is positioned below the first punch pad block 1110, and a first die back pad 1130 is arranged above the first die shell 1100;
the first main mold unit comprises a first main mold shell 1140, and a first main mold kernel 1180 and a first main mold cushion block A1190 are sequentially arranged in the first main mold shell 1140 from top to bottom; a first main mold cushion block B1160 is arranged below the first main mold shell 1140, the first main mold kernel 1180 and the first main mold cushion block a1190 are hollow structures, a first main mold ejector pin 1150 is sleeved in the hollow structures of the first main mold kernel 1180 and the first main mold cushion block a1190, and a first main mold cushion block C1170 is arranged below the first main mold ejector pin 1150.
As shown in fig. 3, the second cold-heading die provided by the present invention includes a second die unit and a second main die unit; the second die unit includes a second die case 2100 provided with a hollow structure, a second punch pad 2110 and a second punch rod 2120 are provided in the second die case 2100, and a second die rear pad 2130 is provided above the second die case 2100; the second punch 2120 bears against the second punch pad 2110 and the second punch 2120 passes through the second die housing 2100.
The second main mold unit provided by the invention comprises a second main mold shell 2140, a second main mold core 2150 and a second main mold thimble 2220; the second main mold housing 2140 has a hollow structure, and a second main mold core 2150 is disposed in the second main mold housing 2140;
the upper end of the through hole of the second main mold 2150 is cylindrical, the lower end is regular hexagonal, and the second main mold thimble 2220 penetrates through the second main mold 2150; the diameter of the second main mold thimble 2220 is smaller than the diameter of the through hole of the second main mold core 2150; the second main mold unit further comprises a second main mold guide sleeve 2160, a second main mold unloading sleeve 2180, a second main mold unloading sleeve rear pad 2200, a second main mold three ejector pin 2210, a second main mold three needle seat 2170 and a second main mold three needle pad 2190; the second main mold guide sleeve 2160 is positioned below the second main mold 2150, the second main mold unloading sleeve 2180 is sleeved on the periphery of the middle end of the second main mold thimble 2220, the second main mold third needle seat 2170 is wrapped on the periphery of the lower end of the second main mold thimble 2220, a second main mold third needle pad 2190 is arranged below the second main mold third needle seat 2170, and a second main mold unloading sleeve rear pad 2200 and a second main mold third thimble 2210 are arranged below the second main mold unloading sleeve; the second cold-heading mould is used for cold-heading the first semi-manufactured goods blank into regular hexagon and upsetting out the hole, forms the second semi-manufactured goods blank, and the second semi-manufactured goods blank includes pole portion and head, pole portion and head are connected, the head profile is regular hexagon, the head is provided with the hole, pole portion is cylindrical.
Three second main mold three thimbles 2210 are arranged on the second main mold three needle seat 2170 and the second main mold three needle pad 2190, and the distances between any two second main mold three thimbles 2210 are equal;
as shown in fig. 4, a third cold heading die for upsetting the rod portion of the flipped second semi-finished blank to form a third semi-finished blank;
the third cold heading die comprises a third punching die unit and a third main die unit; the third die unit comprises a third die shell 3100 and a third die discharging sleeve 3160, the third die discharging sleeve 3160 penetrates through the third die shell 3100, the third die shell 3100 is of a hollow structure, a third die third needle pad 3110 is arranged in the third die shell 3100, a third die third needle seat 3140 is arranged below the third die third needle pad 3110, a third die cushion 3130 is arranged above the third die third needle pad 3110, a third die cushion 3130 is arranged inside the third die rear pad 3120, a third die third thimble 3170 is arranged below the third die cushion 3130, and the third die third needle seat 3140 wraps the third die rod 3150;
the third main mold unit comprises a third main mold housing 3180 and a third main mold ejector pin 3220, wherein a third main mold core 3190 and a third main mold cushion block a3200 are sequentially arranged in the third main mold housing 3180 from top to bottom; the third main mold core 3190 and the third main mold pad a3200 are provided with through holes, and the third main mold thimble 3220 penetrates through the through holes of the third main mold core 3190 and the third main mold pad a 3200.
The third main mold unit further includes a third main mold pad B3210 and a third main mold pad C3230, where the third main mold pad B3210 is located below the third main mold housing 3180, and the third main mold pad C3230 is located below the third main mold ejector pins 3220; the diameter of the through hole of the third main mold core 3190 is smaller than that of the through hole of the second main mold core.
A fourth cold-heading die for cold-heading a flange under the head of the third semi-finished blank to form a fourth semi-finished blank, as shown in fig. 5;
the fourth cold heading die comprises a fourth die unit comprising a fourth die housing 4100, a fourth die stripper sleeve 4160, and a fourth main die unit; a fourth die rear pad 4120 and a fourth die third pad 4110 are arranged in the fourth die housing 4100, the fourth die third pad 4110 is positioned below the fourth die rear pad 4120, a fourth die pad block is arranged inside the fourth die rear pad 4120, a fourth die third pin seat 4140 is arranged below the fourth die third pad 4110, a fourth punch rod 4150 is wrapped in a through hole of the fourth die third pin seat 4140, a fourth die discharging sleeve 4160 penetrates through the through hole of the fourth die housing 4100, and the fourth die discharging sleeve 4160 is sleeved on the periphery of the fourth punch rod 4150;
the fourth main mold unit includes a fourth main mold housing 4100 and a fourth main mold thimble 4220; a fourth main mold core 4190 and a fourth main mold cushion block a4200 are sequentially arranged in the fourth main mold housing 4100 from top to bottom; the fourth main mold housing 4100 and the fourth main mold block a4200 are hollow structures, and the fourth main mold thimble 4220 penetrates through the hollow structures of the fourth main mold housing 4100 and the fourth main mold block a 4200. The fourth main mold unit further includes a fourth main mold pad B4210 and a fourth main mold pad C4230, and the fourth main mold pad B4210 is located below the fourth main mold housing 4100; the fourth main mold pad block C4230 is located below the fourth main mold thimble 4220.
As shown in fig. 6, a fifth cold heading die for cold heading the inner hole of the fourth semi-finished blank into a deep hole to form a fifth semi-finished blank;
the fifth cold heading die comprises a fifth die unit and a fifth main die unit, the fifth die unit comprises a fifth die shell 5100, a fifth punch rod 5110 is wrapped in the fifth die shell 5100, a fifth die cushion block B5150 is arranged above the fifth die shell 5100, fifth ejector rods 5130 are symmetrically arranged on the inner side wall of the fifth die cushion block B5150, a first spring 5140 is sleeved on the periphery of the fifth ejector rod 5130, a fifth die cushion block A5120 is arranged in the fifth die shell 5100, the fifth ejector rod 5130 penetrates through the fifth die cushion block A5120, a fifth die push plate 5160 is arranged below the fifth die shell 5100, a fifth die unloading sleeve 5170 is arranged on the fifth die push plate 5160, and a fifth die unloading sleeve 5170 is sleeved on the fifth punch rod 5110;
the fifth master die unit comprises a fifth master die shell 5180, and a fifth master die core 5190 and a fifth master die cushion block a5200 are sequentially arranged in the fifth master die shell 5180 from top to bottom; the fifth master mold core 5190 and the fifth master mold cushion block a5200 are hollow structures, and fifth master mold thimbles 5220 are arranged in the hollow structures of the fifth master mold core 5190 and the fifth master mold cushion block a 5200.
The fifth main mold unit further includes a fifth main mold block B5220 and a fifth main mold block C5230; fifth main die pad block B5220 is located below fifth main die housing 5180, and fifth main die pad block C5230 is located below fifth main die ejector pin 5220.
As shown in fig. 7, a sixth cold heading die is used for cold heading the deep hole of the fifth semi-finished blank into a through hole to form a finished product of the mid-engine bolt;
the sixth cold heading die comprises a sixth punching die unit and a sixth main die unit, and the sixth punching die unit comprises a sixth punching die shell; a sixth punch bar 6110 is wrapped in the sixth punch shell 6100, a sixth punch cushion block B is arranged above the sixth punch shell 6100, sixth push rods 6130 are symmetrically arranged on the inner side wall of the sixth punch cushion block B, a second spring 6140 is sleeved on the periphery of the sixth push rod 6130, a sixth punch cushion block a6120 is arranged inside the sixth punch shell 6100, and the sixth push rod 6130 penetrates through the sixth punch cushion block a 6120; a sixth die push plate 6160 is arranged below the sixth die shell 6100, a sixth die discharge sleeve 6170 is arranged on the sixth die push plate 6160, and the sixth die discharge sleeve 6170 is sleeved on the sixth punch bar 6110;
the sixth main mold unit comprises a sixth main mold housing 6180, and a sixth main mold front core 6190, a sixth main mold guide sleeve 6200 and a sixth main mold cushion block 6210 are sequentially arranged in the sixth main mold housing 6180 from top to bottom; the sixth main mold pad 6210 is located below the sixth main mold guide sleeve 6200, the sixth main mold front core 6190 is a hollow structure, a sixth main mold ejector pin 6220 and a sixth main mold ejector rod 6230 are wrapped in the hollow structure of the sixth main mold front core 6190, and the sixth main mold ejector pin 6220 is located at the rear end of the sixth main mold ejector rod 6230.
[ example 2 ]
As shown in fig. 8, a cold heading process for manufacturing a bolt in an engine comprises the following steps:
s1, processing a wire blank prepared in advance into a wire blank 0000 for manufacturing a middle bolt through a shearing die and an ejection die;
s2, the wire rod blank processed in the step S1 is conveyed to a first cold heading die 1 by a conveying mechanism, the wire rod blank is cold headed into a first semi-finished blank 1000 with one end of an arc shape, the arc-shaped end serves as a head, and the other end serves as a rod;
s3, the conveying mechanism conveys the first semi-finished blank 1000 obtained in the step S2 to the second cold heading die 2, and the head of the first semi-finished blank 1000 is subjected to cold heading to form a regular hexagon and an inner hole to form a second semi-finished blank 2000;
s4, the conveying mechanism turns over the second semi-finished blank 2000 obtained in the step S3 and conveys the second semi-finished blank to a third cold heading die 3, and the rod part of the second semi-finished blank 2000 is upset to be thin, so that a third semi-finished blank 3000 is formed;
s5, the conveying mechanism conveys the third semi-finished blank 3000 in the step S4 to a fourth cold heading die 4, and a flange is cold headed below the head of the third semi-finished blank 3000 to form a fourth semi-finished blank 4000;
s6, the conveying mechanism conveys the fourth semi-finished blank 4000 in the step S5 to a fifth cold heading die 5, and the inner hole of the fourth semi-finished blank 4000 is subjected to cold heading to form a deep hole, so that a fifth semi-finished blank 5000 is formed;
and S7, conveying the fifth semi-finished blank 5000 obtained in the step S6 to a sixth cold heading die 6 by a conveying mechanism, and cold heading an inner hole of the fifth semi-finished blank 5000 into a through hole to form a finished product 6000 of the mid-engine bolt.
Claims (7)
1. A cold heading module for manufacturing a mid-bolt of an engine comprises a first cold heading die, a second cold heading die, a third cold heading die, a fourth cold heading die, a fifth cold heading die and a sixth cold heading die; the second cold heading die comprises a second punching die unit and a second main die unit, and the second main die unit comprises a second main die shell, a second main die core and a second main die ejector pin; the second main mould shell is of a hollow structure, and a second main mould core is arranged in the second main mould shell;
the first cold heading die is used for cold heading a wire blank for manufacturing a middle bolt into a first semi-finished blank with one arc-shaped end; the second cold heading die is used for cold heading the head of the first semi-finished blank into a regular hexagon and heading an inner hole to form a second semi-finished blank; the third cold heading die is used for upsetting the rod part of the turned second semi-finished blank to form a third semi-finished blank; the fourth cold heading die is used for cold heading a flange below the head of the third semi-finished blank to form a fourth semi-finished blank; the fifth cold heading die is used for cold heading the inner hole of the fourth semi-finished blank into a deep hole to form a fifth semi-finished blank; the sixth cold heading die is used for cold heading the inner hole of the fifth semi-finished blank into a through hole to form a finished product of the engine mid-bolt;
the upper end of the through hole of the second main die core is cylindrical, the lower end of the through hole of the second main die core is regular hexagonal, and the second main die thimble penetrates through the second main die core; the diameter of the second main die ejector pin is smaller than that of the through hole of the second main die core; the second main die unit also comprises a second main die guide sleeve, a second main die unloading sleeve rear cushion, a second main die three ejector pin, a second main die three needle seat and a second main die three needle cushion; the second main die guide sleeve is positioned below the second main die core, the second main die discharging sleeve is sleeved on the periphery of the middle end of the second main die ejector pin, the second main die third needle seat wraps the periphery of the lower end of the second main die ejector pin, a second main die third needle pad is arranged below the second main die third needle seat, and a second main die discharging sleeve rear pad and a second main die ejector pin are arranged below the second main die discharging sleeve;
the second semi-finished blank comprises a rod part and a head part, the rod part is connected with the head part, the outline of the head part is a regular hexagon, the head part is provided with an inner hole, and the rod part is cylindrical;
the third cold heading die comprises a third punching die unit and a third main die unit; the third die unit comprises a third die shell and a third die unloading sleeve, the third die unloading sleeve penetrates through the third die shell, the third die shell is of a hollow structure, a third die third needle pad is arranged in the third die shell, a third die third needle seat is arranged below the third die third needle pad, a third die rear pad is arranged above the third die third needle pad, a third die cushion block is arranged in the third die rear pad, a third die third thimble is arranged below the third die cushion block, and a third die third needle seat wraps a third punch rod;
the third main die unit comprises a third main die shell and a third main die thimble, and a third main die kernel and a third main die cushion block A are sequentially arranged in the third main die shell from top to bottom; the third main die kernel and the third main die cushion block A are provided with through holes, and the third main die thimble penetrates through the through holes of the third main die kernel and the third main die cushion block A;
the fourth cold heading die comprises a fourth die unit and a fourth main die unit, and the fourth die unit comprises a fourth die shell and a fourth die unloading sleeve; a fourth die rear cushion and a fourth die third needle cushion are arranged in the fourth die shell, the fourth die third needle cushion is positioned below the fourth die rear cushion, a fourth die cushion block is arranged in the fourth die rear cushion, a fourth die third needle seat is arranged below the fourth die third needle cushion, a fourth die rod is wrapped in a through hole of the fourth die third needle seat, a fourth die unloading sleeve penetrates through a through hole of the fourth die shell, and the fourth die unloading sleeve is sleeved on the periphery of the fourth die rod;
the fourth main die unit comprises a fourth main die shell and a fourth main die ejector pin; a fourth main die kernel and a fourth main die cushion block A are sequentially arranged in the fourth main die shell from top to bottom; the fourth main mould shell and the fourth main mould cushion block A are of hollow structures, and the fourth main mould thimble penetrates through the hollow structures of the fourth main mould shell and the fourth main mould cushion block A;
the fifth cold heading die comprises a fifth die unit and a fifth main die unit, the fifth die unit comprises a fifth die shell, a fifth punch rod is wrapped in the fifth die shell, a fifth die cushion block B is arranged above the fifth die shell, fifth ejector rods are symmetrically arranged on the inner side wall of the fifth die cushion block B, a spring is sleeved on the periphery of the fifth ejector rod, a fifth die cushion block A is arranged in the fifth die shell, the fifth ejector rod penetrates through the fifth die cushion block A, a fifth die push plate is arranged below the fifth die shell, a fifth die unloading sleeve is arranged on the fifth die push plate, and the fifth die unloading sleeve is sleeved on the fifth punch rod;
the fifth main die unit comprises a fifth main die shell, and a fifth main die kernel and a fifth main die cushion block A are sequentially arranged in the fifth main die shell from top to bottom; the fifth main die kernel and the fifth main die cushion block A are of hollow structures, and fifth main die ejector pins are arranged in the hollow structures of the fifth main die kernel and the fifth main die cushion block A.
2. The cold-heading die set for the middle-placed bolt according to claim 1, wherein the third main die unit further comprises a third main die cushion block B and a third main die cushion block C, the third main die cushion block B is located below a third main die shell, and the third main die cushion block C is located below a third main die ejector pin; the diameter of the through hole of the third main die core is smaller than that of the through hole of the second main die core.
3. The center bolt cold-heading module of claim 1, wherein the fourth main die unit further comprises a fourth main die pad B and a fourth main die pad C, the fourth main die pad B being located below the fourth main die shell; and the fourth main die cushion block C is positioned below the fourth main die thimble.
4. The center bolt cold heading die set of claim 1, wherein the fifth main die unit further comprises a fifth main die pad block B and a fifth main die pad block C; and the fifth main mold cushion block B is positioned below the fifth main mold shell, and the fifth main mold cushion block C is positioned below the fifth main mold ejector pin.
5. The cold heading die set for the center bolt according to claim 1, further comprising a sixth cold heading die for cold heading the deep hole of the fifth semi-finished blank into a through hole to form a finished product of the center bolt in the engine;
the sixth cold heading die comprises a sixth punching die unit and a sixth main die unit, and the sixth punching die unit comprises a sixth punching die shell; a sixth stamping rod is wrapped in the sixth stamping die shell, a sixth stamping die cushion block B is arranged above the sixth stamping die shell, sixth ejector rods are symmetrically arranged on the inner side wall of the sixth stamping die cushion block B, springs are sleeved on the periphery of the sixth ejector rods, a sixth stamping die cushion block A is arranged in the sixth stamping die shell, and the sixth ejector rods penetrate through the sixth stamping die cushion block A; a sixth stamping die push plate is arranged below the sixth stamping die shell, a sixth stamping die discharging sleeve is arranged on the sixth stamping die push plate, and the sixth stamping die discharging sleeve is sleeved on a sixth stamping rod;
the sixth main die unit comprises a sixth main die shell, and a sixth main die front core, a sixth main die guide sleeve and a sixth main die cushion block are sequentially arranged in the sixth main die shell from top to bottom; the sixth main die cushion block is located below the sixth main die guide sleeve, the sixth main die front core is of a hollow structure, a sixth main die ejector pin and a sixth main die ejector rod are wrapped in the hollow structure of the sixth main die front core, and the sixth main die ejector pin is located at the rear end of the sixth main die ejector rod.
6. The center bolt cold heading die set according to claim 3, wherein the first cold heading die is used for cold heading a wire blank into a first semi-finished blank with one end in a circular arc shape;
the first cold heading die comprises a first punching die unit and a first main die unit;
the first die unit comprises a first die shell, a first punch cushion block and a first punch rod are arranged in the first die shell, the first punch rod is located below the first punch cushion block, and a first die back cushion is arranged above the first die shell;
the first main die unit comprises a first main die shell, and a first main die kernel and a first main die cushion block A are sequentially arranged in the first main die shell from top to bottom; the first main die shell is characterized in that a first main die cushion block B is arranged below the first main die shell, the first main die kernel and the first main die cushion block A are of hollow structures, first main die ejector pins are sleeved in the hollow structures of the first main die kernel and the first main die cushion block A, and a first main die cushion block C is arranged below the first main die ejector pins.
7. A cold heading process for manufacturing a center bolt of an engine, which uses the cold heading die set for the center bolt of any one of claims 1 to 6, and is characterized by comprising the following steps:
s1: preparing a wire blank for manufacturing the middle bolt;
s2: the wire rod blank prepared in the step S1 is conveyed to a first cold heading die, and the wire rod blank is cold headed into a first semi-finished blank with one end being in a circular arc shape;
s3: transferring the first semi-finished blank obtained in the step S2 to a second cold heading die, and carrying out cold heading on the first semi-finished blank into a regular hexagon and heading an inner hole to form a second semi-finished blank, wherein the second semi-finished blank comprises a rod part and a head part, the rod part is connected with the head part, the outline of the head part is a regular hexagon, the head part is provided with an inner hole, and the rod part is cylindrical;
s4: turning over the second semi-finished blank obtained in the step S3 and conveying the second semi-finished blank to a third cold heading die, and upsetting the rod part of the second semi-finished blank to form a third semi-finished blank;
s5: transferring the third semi-finished blank obtained in the step S4 to a fourth cold heading die, and cold heading a flange below the head of the third semi-finished blank to form a fourth semi-finished blank;
s6: transferring the fourth semi-finished blank obtained in the step S5 to a fifth cold heading die, and cold heading an inner hole of the fourth semi-finished blank into a deep hole to form a fifth semi-finished blank;
s7: and (5) transferring the fifth semi-finished blank obtained in the step S6 to a sixth cold heading die, and cold heading the inner hole of the fifth semi-finished blank into a through hole to form the finished product of the mid-engine bolt.
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| CN202010804469.6A CN111872295B (en) | 2020-08-12 | 2020-08-12 | Cold heading module and cold heading process for manufacturing middle bolt of engine |
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| CN202010804469.6A CN111872295B (en) | 2020-08-12 | 2020-08-12 | Cold heading module and cold heading process for manufacturing middle bolt of engine |
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| CN112517831A (en) * | 2020-11-18 | 2021-03-19 | 嘉善宝岛模具厂(普通合伙) | Guide pin cold heading processing technology |
| CN114453541A (en) * | 2021-12-29 | 2022-05-10 | 广东顺科电气制造有限公司 | Cold heading device and cold heading process for forming battery leading-out terminal |
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