CN106623720A - Moving die core of cold heading die - Google Patents

Moving die core of cold heading die Download PDF

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Publication number
CN106623720A
CN106623720A CN201510722083.XA CN201510722083A CN106623720A CN 106623720 A CN106623720 A CN 106623720A CN 201510722083 A CN201510722083 A CN 201510722083A CN 106623720 A CN106623720 A CN 106623720A
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CN
China
Prior art keywords
cold
core
thimble
heading
chamber
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Granted
Application number
CN201510722083.XA
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Chinese (zh)
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CN106623720B (en
Inventor
刘�文
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Chongqing Jifei Intelligent Equipment Technology Co., Ltd
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CHONGQING DINGHAN MACHINERY Co Ltd
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Priority to CN201510722083.XA priority Critical patent/CN106623720B/en
Publication of CN106623720A publication Critical patent/CN106623720A/en
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Publication of CN106623720B publication Critical patent/CN106623720B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/08Accessories for handling work or tools
    • B21J13/14Ejecting devices

Abstract

The invention discloses a moving die core of a cold heading die. A bulge is arranged on the outer side of the tail end of a core body. A moving die cavity is formed inside the core body in a penetrating mode and sequentially divided into a cold heading cavity, a thimble cavity and a thimble seat cavity from the front end to the tail end of the moving die core. An insert is fixed to a cavity wall, close to the front end, of the core body, and the cold heading cavity is located in the insert. The thimble seat cavity is composed of a cross section and a rectangle section penetrating the cross section, and the rectangle section communicates with the thimble cavity. A structure of the thimble seat cavity is added, so that the inserting status of cold heading and a pushing material is obtained through the cooperation of the thimble seat cavity and a thimble seat, and a special pushing rod is not needed to push out a workpiece.

Description

Cold heading die moving-mould-core
Technical field
The present invention relates to a kind of mold insert structure of cold upsetting die of car, and in particular to a kind of cold heading die moving-mould-core.
Background technology
Cold-heading is at normal temperatures to the forging method of metal bar material upsetting formation using mould.It is commonly used to manufacture the head of screw, bolt, rivet etc..Can reduce or replace machining.Forging stock material can be copper, aluminium, carbon steel, steel alloy, stainless steel and titanium alloy etc., and stock utilization is up to 80~90%.Cold-heading is more to be carried out on special cold headers, facilitates implementation continuous, multistation, automated production.Bar is cut into blank by feed mechanism automatic feed certain depth, shut-off mechanism, and then delivering to accumulation swaging and punching station successively by clamp transport mechanism carries out cold upset forming.The major advantage of cold-heading:Cold-heading can be processed into and be suitable for less load and shorter span.Unusual cross sectional shape can economically be obtained by cold-heading processing, gratifying strength-weight ratio is obtained.Consider packaging and the tight type transported, nestable section can be produced.The impact of non-telescope deformation under surrounding gravity effect.
At present, in cold-heading processing, spring punch die is widely used.There is a thimble as heading in general spring punch die structure.But, in order to strictly limit the size of the workpiece after cold-heading, it is a fixed value that general thimble stretches into the length in die cavity, just can be by bar cold-heading into workpiece after the fully-inserted die cavity of thimble.After workpiece cold-heading molding, need to be taken out from die cavity, in general, the more regular workpiece of shape can come off from die cavity under gravity automatically, realize stripping operation.But, for special workpiece is adding man-hour, after cold-heading, partial cross section product becomes big to bar, the meeting phenomenon of appearance containing material in die cavity.Along with workpiece conduct oneself with dignity it is less, it is impossible to workpiece is deviate from from die cavity in the presence of self gravitation.When running into this workpiece, after cold-heading, need to exit thimble from spring punch die, with another longer push rod insertion die cavity, workpiece is ejected.This mode, not only wastes time and energy, and is repeatedly inserted into push rod every time and thimble all suffers from the problem of a repositioning, once positioning is inaccurate, push rod or the deflection of thimble can be caused even to fracture during insertion.Therefore, certain improvement is made to the structure of moving-mould-core, it will help stripping operation is carried out to workpiece with reference to thimble.
The content of the invention
It is an object of the invention to provide the thimble in a kind of cold heading die moving-mould-core, with cold-heading molding mechanism coordinates, the workpiece after cold-heading molding is facilitated to eject from moving-mould-core.
To reach above-mentioned purpose, the technical scheme is that:Cold heading die moving-mould-core, including the core body of cylindricality, the end outside of the core body is provided with projection, the inside of the core body is through being provided with a dynamic model chamber, the dynamic model chamber is divided into cold-heading chamber, thimble chamber and thimble seat chamber from the front end of moving-mould-core to end, and the cavity wall in the core body near front end is fixed with insert, and the cold-heading chamber is located in insert, the thimble seat chamber constitutes by cross section and through the rectangle section of cross section, and the rectangle section is connected with thimble chamber.
During using above-mentioned technical proposal, by improving, thimble seat chamber is offered in core body, and thimble seat chamber constitutes by cross section and through the rectangle section of cross section so that and thimble seat is inserted into cross section.But, if selecting certain direction of insertion, thimble seat will be caused to can be only inserted into cross section and cannot be inserted into rectangle section, so, rectangle section can just form a boss, it is spacing to thimble seat formation one, prevent the thimble seat in cold-heading to be excessively inserting and cause the thimble of front end that workpiece upsetting is bad.Furthermore, by 90 ° of rotation thimble seats, thimble seat can be inserted into rectangle section through cross section, so as to thimble insertion dynamic model chamber will be increased in depth, will eject in the driven die cavity of workpiece after cold-heading molding, realize the operation of the demoulding.Structure due to having redesigned core body so that same thimble can double as cold-heading and the effect of ejection workpiece, without the operation changed between cold-heading and ejection workpiece.Compare traditional needs to arrange single push rod to eject workpiece, structure after improvement is more simple, only need to be rotated by 90 ° the action that can just realize ejecting, positioning need not be re-started to thimble and push rod and insert the operation of dynamic model, inaccurate the brought problem of positioning is overcome, the efficiency of cold-heading and pickup is also improved.
Further improvement project, the cross section is by two identicals and orthogonal rectangular slot is constituted.The setting, can process cross section and rectangle section with unified standard so that two sections of process equipment with general, and can simplify the operating procedure of processing so that a part for rectangle section has been also included among cross section.
Further improvement project, described raised for annular.The projection of annular is convenient for processing, and circumferentially disposed stress is also more reasonable.
Further improvement project, the cross section is identical with the length of rectangle section.The setting can be easy to calculate and set the depth of thimble seat insertion.
Further improvement project, the length in the cold-heading chamber is more than the length in thimble seat chamber.The setting, can leave enough operating spaces to cold-heading chamber, and can prevent the fully extended core body of thimble when workpiece is ejected.
Description of the drawings
With reference to the accompanying drawings and detailed description the present invention is further detailed explanation:
Fig. 1 is the cross section structure diagram of cold heading die moving-mould-core embodiment of the present invention;
Fig. 2 is the right side structural representation of Fig. 1.
Specific embodiment
Reference:Moving-mould-core 1, raised 2, dynamic model chamber 3, cold-heading chamber 31, thimble chamber 32, thimble seat chamber 33.
As depicted in figs. 1 and 2, cold heading die moving-mould-core of the present invention, wherein, whole moving-mould-core 1 is in bar shape, the projection 2 of a ring shape is formed with the outside of the end of moving-mould-core 1, raised 2 are put for the end of moving-mould-core 1 is stuck in into dynamic model, prevent from being extracted in the driven die sleeve of whole moving-mould-core 1.And also corresponding ferrule structure can be put by dynamic model and block raised 2 so that dynamic model set etc. enough drives moving-mould-core 1 to move axially.In addition, in the inside of moving-mould-core 1 through a dynamic model chamber 3 is provided with, wherein dynamic model chamber 3 is divided into cold-heading chamber 31, thimble chamber 32 and thimble seat chamber 33 from the front end of moving-mould-core 1 to end.Wherein, cold-heading chamber 31 is that for accommodating bar, and bar carries out wherein cold-heading molding.Thimble chamber 32 is mainly the thimble of cold-heading molding and is located therein, for carrying out cold-heading extruding to bar.And thimble seat chamber 33 is for accommodating thimble seat, especially can be by limiting the insertion depth of thimble seat, so as to limit the insertion depth of thimble on thimble seat, so as to the depth for passing through to change thimble insertion realizes thimble to the cold-heading of bar or the two states of extrusion workpiece.Specifically, thimble chamber 32 be section be circular cavity, coordinate with the thimble of cylinder.
It is emphasized that thimble seat chamber 33 divide into two sections, and the end for being located proximate to moving-mould-core 1 of first paragraph, the position of second segment connects with first paragraph.Wherein, second segment is that cross sectional shape is rectangular rectangular slot, and the shapes and sizes in the section of the rectangular slot are identical with the rectangular cross-section size of thimble seat.First paragraph is the cross bath that cross sectional shape is cross, and the cross bath is made up of two orthogonal rectangular slots, and wherein the rectangular slot of second segment is connected with a rectangular slot in cross bath in first paragraph.In addition, one is fixed with moving-mould-core 1 at the cavity wall of front end determine insert 11, and whole cold-heading chamber 31 is all to be located to determine the hardness that the hardness that insert 11 is determined in insert 11 is greater than the outer wall of moving-mould-core 1, can reduce deformation and abrasion of the bar during cold-heading in cold-heading chamber 31.
During concrete operations, bar to be processed is placed on station, a part for bar can be inserted into cold-heading chamber 31.The thimble of thimble seat front end simultaneously carries out cold-heading to bar, and now thimble 41 will extruded bar stock so that bar to the sidepiece in cold-heading chamber 31 is extruded, so as to by bar cold-heading molding.Particularly, during cold-heading, thimble seat arc can be inserted into thimble seat chamber 33.Because thimble seat chamber 33 divide into two sections, after the first paragraph in the front end insertion thimble seat chamber 33 in thimble seat chamber 33, it is impossible to be further continued for inserting in the second segment in thimble seat chamber 33.Second segment is just make use of to carry out to the maximum cold-heading position in thimble seat chamber 33 in the boss that first paragraph end is formed spacing.Can prevent during cold-heading, thimble is excessively inserting and workpiece upsetting is bad.After cold-heading terminates, thimble seat is retreated, at least exit whole thimble seat from thimble seat chamber 33, then after thimble seat is rotated by 90 °, in insertion moving-mould-core 1.Because thimble seat have rotated 90 °, therefore, thimble seat by first paragraph and can be entered into second segment, it will in inserting always until being completely inserted into thimble seat chamber 33.Now thimble stretches into the length in cold-heading chamber 31 more than the length stretched into during cold-heading, it will the workpiece ejection of cold-heading molding in cold-heading chamber 31.
By improving, thimble seat chamber 33 is offered in moving-mould-core 1, and thimble seat chamber 33 constitutes by cross section and through the rectangle section of cross section so that and thimble seat is inserted into cross section.But, if selecting certain direction of insertion, thimble seat will be caused to can be only inserted into cross section and cannot be inserted into rectangle section, so, rectangle section can just form a boss, it is spacing to thimble seat formation one, prevent the thimble seat in cold-heading to be excessively inserting and cause the thimble of front end that workpiece upsetting is bad.Furthermore, by 90 ° of rotation thimble seats, thimble seat can be inserted into rectangle section through cross section, so as to thimble insertion dynamic model chamber will be increased in depth, will eject in the driven die cavity of workpiece after cold-heading molding, realize the operation of the demoulding.Structure due to having redesigned moving-mould-core 1 so that same thimble can double as cold-heading and the effect of ejection workpiece, without the operation changed between cold-heading and ejection workpiece.Compare traditional needs to arrange single push rod to eject workpiece, structure after improvement is more simple, only need to be rotated by 90 ° the action that can just realize ejecting, positioning need not be re-started to thimble and push rod and insert the operation of dynamic model, inaccurate the brought problem of positioning is overcome, the efficiency of cold-heading and pickup is also improved.
Above-described is only the preferred embodiment of the present invention; it should be understood that; for a person skilled in the art; without departing from the inventive concept of the premise; some deformations and improvement can also be made; these should also be considered as protection scope of the present invention, and these are all without the effect and practical applicability for affecting the present invention to implement.

Claims (5)

1. cold heading die moving-mould-core, including the core body of cylindricality, the end outside of the core body is provided with projection, through a dynamic model chamber is provided with, the dynamic model chamber is divided into cold-heading chamber, thimble chamber and thimble seat chamber from the front end of moving-mould-core to end for the inside of the core body, and the cavity wall in the core body near front end is fixed with insert, the cold-heading chamber is located in insert, it is characterized in that, the thimble seat chamber constitutes by cross section and through the rectangle section of cross section, and the rectangle section is connected with thimble chamber.
2. cold heading die moving-mould-core according to claim 1, is characterized in that, the cross section is by two identicals and orthogonal rectangular slot is constituted.
3. cold heading die moving-mould-core according to claim 1, is characterized in that, described raised for annular.
4. cold heading die moving-mould-core according to claim 1, is characterized in that, the cross section is identical with the length of rectangle section.
5. cold heading die moving-mould-core according to claim 1, is characterized in that, the length in the cold-heading chamber is more than the length in thimble seat chamber.
CN201510722083.XA 2015-10-31 2015-10-31 Cold heading die moving-mould-core Active CN106623720B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510722083.XA CN106623720B (en) 2015-10-31 2015-10-31 Cold heading die moving-mould-core

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Application Number Priority Date Filing Date Title
CN201510722083.XA CN106623720B (en) 2015-10-31 2015-10-31 Cold heading die moving-mould-core

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CN106623720A true CN106623720A (en) 2017-05-10
CN106623720B CN106623720B (en) 2019-04-19

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127626A (en) * 1960-11-01 1964-04-07 Nat Machinery Co Punch knock-outs for double-blow header
JPH08141686A (en) * 1994-11-15 1996-06-04 Musashi Seimitsu Ind Co Ltd Forging apparatus
CN200967186Y (en) * 2006-09-13 2007-10-31 田军 Adjustable screwdriver
CN203061790U (en) * 2013-01-28 2013-07-17 苏州工业园区新凯精密五金有限公司 Fully-enclosed bevel gear shaft cold heading mould structure
CN104043766A (en) * 2013-03-11 2014-09-17 大进合紧固件(昆山)有限公司 Cold heading die for engine bearing cover fastener
CN204094035U (en) * 2014-08-15 2015-01-14 宾科汽车紧固件(昆山)有限公司 Spline pin shaft cold-heading device
CN104646581A (en) * 2015-03-10 2015-05-27 富奥汽车零部件股份有限公司 Manufacturing method and mold structure of oversized-head pole bolt

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127626A (en) * 1960-11-01 1964-04-07 Nat Machinery Co Punch knock-outs for double-blow header
JPH08141686A (en) * 1994-11-15 1996-06-04 Musashi Seimitsu Ind Co Ltd Forging apparatus
CN200967186Y (en) * 2006-09-13 2007-10-31 田军 Adjustable screwdriver
CN203061790U (en) * 2013-01-28 2013-07-17 苏州工业园区新凯精密五金有限公司 Fully-enclosed bevel gear shaft cold heading mould structure
CN104043766A (en) * 2013-03-11 2014-09-17 大进合紧固件(昆山)有限公司 Cold heading die for engine bearing cover fastener
CN204094035U (en) * 2014-08-15 2015-01-14 宾科汽车紧固件(昆山)有限公司 Spline pin shaft cold-heading device
CN104646581A (en) * 2015-03-10 2015-05-27 富奥汽车零部件股份有限公司 Manufacturing method and mold structure of oversized-head pole bolt

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Effective date of registration: 20200511

Address after: 402160 No.66, Fenghuang 2nd Street, Yongchuan District, Chongqing (in Fenghuang Lake Industrial Park, Yongchuan Industrial Park, Chongqing)

Patentee after: Chongqing Jifei Intelligent Equipment Technology Co., Ltd

Address before: 402160 Phoenix Lake Industrial Park, Yongchuan Industrial Park, Chongqing

Patentee before: CHONGQING DINGHAN MACHINERY Co.,Ltd.