CN103252373A - Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut - Google Patents

Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut Download PDF

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Publication number
CN103252373A
CN103252373A CN2013101336903A CN201310133690A CN103252373A CN 103252373 A CN103252373 A CN 103252373A CN 2013101336903 A CN2013101336903 A CN 2013101336903A CN 201310133690 A CN201310133690 A CN 201310133690A CN 103252373 A CN103252373 A CN 103252373A
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CN
China
Prior art keywords
punch
temperature alloy
nut
extrusion forming
skirt
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Pending
Application number
CN2013101336903A
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Chinese (zh)
Inventor
辛选荣
史颂华
贺成松
刘新成
史志欣
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LUOYANG QINHAN COLD FORGING CO Ltd
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LUOYANG QINHAN COLD FORGING CO Ltd
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Priority to CN2013101336903A priority Critical patent/CN103252373A/en
Publication of CN103252373A publication Critical patent/CN103252373A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cold-extrusion forming process of a high-temperature alloy high-strength skirt type self-locking hexagonal nut. The cold-extrusion forming process comprises the following steps of: firstly selecting a high-temperature alloy rod with a suitable casting diameter to do solid melting treatment; and then, carrying out extrusion on the rod section in a cold-extrusion forming mould to form an internal blind hole cavity of the nut, form a skirt bottom end cavity of the nut, form an outer hexagon of the nut and form a short cylinder straight footstep of the nut to be connected with a skirt of a cone of 45 degrees. After the high-temperature alloy high-strength skirt type self-locking hexagonal nut disclosed by the invention is extruded up and down, metal fibers are continuously distributed from the skirt to the hexagon; and the metal fibers in a hole can be vertically combed under the extrusion of strong extrusion force, so that the toughness of a product is improved.

Description

The cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts
Technical field
The present invention relates to the fine forging technology field, be specifically related to a kind of cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts.
Background technology
Present domestic anti-back high strength six square nuts on the market, as Fig. 1, this class nut does not have skirt, at one end has six to cross the anti-back slot that the center symmetry communicates in twos on six aspects, and the length of groove accounts for 1/3 of nut length overall, and anti-back slot is that the machined system of milling forms.The straight step skirt of short cylindrical as shown in Figure 2 formula anti-back high-strength nut on the market, its manufacturability is relatively poor, and being machined to fiber that six aspects will connect skirt, to mill the intensity of having broken bad, and skirt can the distortion of surrender property when bearing capacity was big.Existing processing technology more is not suitable for processing high temperature alloy high strength skirt formula self-locking six square nuts as shown in Figure 3, particularly skirt connects the hexahedron profile, the hexahedron structure is identical with existing anti-back high strength six square nut structures, skirt end end face is designed to have the face that possesses self-lock ability of certain recessed heart amount, the skirt position is made of 45 ° of circular cones of the straight step switching of short cylindrical, connect under 45 ° of circular cones and connect hexahedron on the short cylindrical short cylindrical is formed powerful supporting, strengthened carrying and the self-lock ability of skirt end face.
The patent No. is in the patent documentation of ZL200310103515.6, a kind of continuously extruding and molding method of making self lock nut in the cold forging mode is disclosed, this self lock nut comprises nut body and a grappling bead, wherein is provided with the internal thread hole that runs through entire body in the inside of nut body and grappling bead; The top end face of nut body forms a shoulder and forms the tooth portion of array along the circumferential outer surface of bead; During extrusion modling, recontour and become the modification process of preliminary dimension in the finishing shaping dies successively; Bead preformed process in the bead preforming tool; Bead adjustment and tooth portion forming process in bead adjustment and the tooth portion mould; Punch process.The link stress boring in the end of above-mentioned extrusion process, fragile cutter.
Summary of the invention
The invention technical problem to be solved provides a kind of cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts, the nut shape high conformity that produces through this technology, the metallic fiber of nut is along its body continuous distributed, interior outline body disposable integral forms, the density height, skirt position bearing strength height.
The invention is for solving the problems of the technologies described above, by the following technical solutions:
The cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts,
The high temperature alloy rod section of at first selecting suitably to go into mode diameter is made the molten admittedly step of handling;
To in the cold extrusion forming mould, carry out extruding then in rod section, form blind hole cavity in the body of nut simultaneously, form nut skirt bottom cavity, form the outer hexahedron of nut and form the step of skirt of 45 ° of circular cones of the straight step switching of short cylindrical of nut.
Be better implement the invention, institute's cold extrusion forming mould comprises punch, lower punch and die, is provided with the ccontaining cavity of going up punch and lower punch in the described die; Wherein, the last punch outside is arranged in the die cavity by punch case, and the lower punch outside is provided with ejector sleeve, and ejector sleeve is promoted by push rod; Die, go up the flowing space that space that punch and punch case, lower punch and ejector sleeve form constitutes high temperature alloy rod section.
Further, described die, go up punch and punch case and constitute the flow skirt space of 45 ° of circular cones of the straight step switching of short cylindrical of forming nut of high temperature alloy rod section.
Further, described die, lower punch and ejector sleeve constitute the mobile outer hexahedron of nut and the space of endoporus of forming of high temperature alloy rod section.
Further, described upward punch and punch case, lower punch constitute the space of the skirt bottom cavity of the mobile formation of high temperature alloy rod section nut.
Further, the described punch case outside also is provided with the punch positioning sleeve, and upside also is provided with the punch pad.
Further, the described die outside is provided with die centre circle and die outer ring successively, and the die outer ring is supported by die holder.
Further, be provided with sliding sleeve outside the described ejector sleeve; The lower punch outside is provided with the lower punch fixed head, and the lower punch fixed head is used for supporting sliding sleeve, and lower punch fixed head downside is provided with the lower punch pad; Lower punch pad downside is provided with lower shoe; Be provided with the movable cavity of push rod in described lower punch fixed head, lower punch pad and the lower shoe.
Be better implement the invention, comprise that also forging behind the cold-extruded carries out the step of Ageing Treatment.
Be better implement the invention, comprise that also machine adds the formation internal thread, the step of shaping size.
Owing to adopted technique scheme, the invention to have following beneficial effect:
1, this technology compares that blank is met personally light at cold closed-die forging front truck two ends and at through hole of centre drill technology ratio of cold precision forging again, save the boring step, reduced the expense of boring bar tool, when every product has been saved 20% material again and also saved the drillman, reduced product cost when having improved production efficiency.
2, with similar band step circular skirt seat formula anti-back high-strength nut ratio, high alloy high strength skirt formula self-locking six square nuts of the present invention are after pushing up and down, metallic fiber from skirt to the hexahedron continuous distributed, metallic fiber also carries out vertical combing in the hole under the extruding of powerful extruding force, has improved the toughness of product.
3, the inside and outside base substrate of high alloy high strength skirt formula self-locking six square nuts, the powerful extruding force of process extrudes and forms, material internal has produced very big internal stress, the inherent strain of the skirt of nut and skirt end face particularly, intensity is higher than high temperature alloy high strength skirt formula self-locking six square nuts of other processing method processing herein, make skirt and skirt end face bearing capacity and the self-lock ability of nut, fatigue resistance has improved, and improved service life.
Description of drawings
Fig. 1 is the structural representation of standard high strength anti-back nut;
Fig. 2 is with straight platform skirt formula high strength anti-back nut schematic diagram;
Fig. 3 is high temperature alloy high strength anti-back nut product schematic diagram of the present invention;
Fig. 4 is high temperature alloy high strength anti-back nut cold-extruded forging schematic diagram of the present invention;
Fig. 5 is the invention cold-extruded formed product mould structure schematic diagram;
The specific embodiment
Be example with MJ24X2 skirt formula self-locking six square nuts: adopt Φ 35mm bar, sawing is the rod section of 16 ± 0.1mm.The flat end end face of machined elder generation car is seen light, and the parallel other end of the car of touching the pillow decide length overall, and car other end control rod segment length 15 ± 0.1mm, turning be to Φ 34.2+0.15mm, a C2 angle.Blank integral body after the machined shot-blasting machine of packing into is carried out Shot Blasting, and the blank integral surface applies lubricant then.Wherein, lubricant is selected the a830 lubricating oil that Castrol company produces for use.
In conjunction with Fig. 3, Fig. 4 and Fig. 5, blank carries out cold-extrusion shaping through after the above-mentioned processing in the cold extrusion forming cavity body of mould, is shaped to the structural feature of skirt, recessed heart blind hole skirt end face, outer hexahedron and the interior blind hole of 45 ° of circular cones of the straight step switching of short cylindrical; Outer hexahedron and the interior isometric and mutual concentricity of blind hole are higher.Become parison through Ageing Treatment on nut after the cold extrusion, machined car hexahedron one end end face is decided the tapping of length overall reaming chamfering then, Passivation Treatment, and according to the inspection eventually of size among the figure.
In conjunction with Fig. 5, in the cold extrusion forming, the blank of smearing lubricating oil keeps flat in the matrix cavity, extrusion billet under the effect of punch and the descending power of punch case, blank produces plastic deformation under the effect of cold-extruded pressure in matrix cavity, finally be extruded into high strength skirt formula self-locking six square nut base substrates.Concrete, the cold extrusion forming mould comprises punch 2, lower punch 11 and die 5, is provided with the ccontaining cavity of going up punch 2 and lower punch 11 in the die 5; Wherein, last punch 2 outsides are arranged in die 5 cavitys by punch case 3, and lower punch 11 outsides are provided with ejector sleeve 10, and ejector sleeve 10 is promoted by push rod 16; Die 5, go up the flowing space that space that punch 2 and punch case 3, lower punch 11 and ejector sleeve 10 form constitutes high temperature alloy rod section.Further, die 5, go up punch 2 and punch case 3 and constitute the flow skirt space of 45 ° of circular cones of the straight step switching of short cylindrical of forming nuts of high temperature alloys rod section; Die 5, lower punch 11 and ejector sleeve 10 constitute the mobile outer hexahedron of nut and the space of endoporus of forming of high temperature alloy rod section; Last punch 2 and punch case 3, lower punch 11 constitute the mobile space that forms the skirt bottom cavity of nut of high temperature alloy rod section.
Wherein, punch case 3 outsides also are provided with punch positioning sleeve 4, and upside also is provided with punch pad 1.Die 5 outsides are provided with die centre circle 6 and die outer ring 7 successively, and die outer ring 7 is supported by die holder 14.Ejector sleeve 10 outsides are provided with sliding sleeve 9; Lower punch 11 outsides are provided with lower punch fixed head 12, and lower punch fixed head 12 is used for supporting sliding sleeve 9, and lower punch fixed head 12 downsides are provided with lower punch pad 13; Lower punch pad 13 downsides are provided with the lower shoe 15 that supports die holder 14; Be provided with the movable cavity of push rod 16 in lower punch fixed head 12, lower punch pad 13 and the lower shoe 15.

Claims (10)

1. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts is characterized in that:
The high temperature alloy rod section of at first selecting suitably to go into mode diameter is made the molten admittedly step of handling;
To in the cold extrusion forming mould, carry out extruding then in rod section, form blind hole cavity in the body of nut simultaneously, form nut skirt bottom cavity, form the outer hexahedron of nut and form the step of skirt of 45 ° of circular cones of the straight step switching of short cylindrical of nut.
2. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 1, it is characterized in that: institute's cold extrusion forming mould comprises punch (2), lower punch (11) and die (5), is provided with the ccontaining cavity of going up punch (2) and lower punch (11) in the described die (5); Wherein, last punch (2) outside is arranged in die (5) cavity by punch case (3), and lower punch (11) outside is provided with ejector sleeve (10), and ejector sleeve (10) is promoted by push rod (16); Die (5), go up the flowing space that space that punch (2) and punch case (3), lower punch (11) and ejector sleeve (10) form constitutes excellent section of high temperature alloy.
3. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: described die (5), go up punch (2) and punch case (3) and constitute high temperature alloy rod section the transfer skirt space of 45 ° of circular cones of the straight step of short cylindrical that forms nut of flowing.
4. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: described die (5), lower punch (11) and the mobile outer hexahedron of nut and the space of endoporus of forming of ejector sleeve (10) formation high temperature alloy rod section.
5. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: the space of the skirt bottom cavity of described upward punch (2) and punch case (3), the mobile formation of lower punch (11) formation high temperature alloy rod section nut.
6. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: described punch case (3) outside also is provided with punch positioning sleeve (4), and upside also is provided with punch pad (1).
7. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: described die (5) outside is provided with die centre circle (6) and die outer ring (7) successively, and die outer ring (7) are supported by die holder (14).
8. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 2 is characterized in that: be provided with sliding sleeve (9) outside the described ejector sleeve (10); Lower punch (11) outside is provided with lower punch fixed head (12), and lower punch fixed head (12) is used for supporting sliding sleeve (9), and lower punch fixed head (12) downside is provided with lower punch pad (13); Lower punch pad (13) downside is provided with lower shoe (15); Be provided with the movable cavity of push rod (16) in described lower punch fixed head (12), lower punch pad (13) and the lower shoe (15).
9. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 1 is characterized in that: comprise that also forging behind the cold-extruded carries out the step of Ageing Treatment.
10. the cold extrusion forming technology of high temperature alloy high strength skirt formula self-locking six square nuts according to claim 1 is characterized in that: comprise that also machine adds the formation internal thread, the step of shaping size.
CN2013101336903A 2013-04-17 2013-04-17 Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut Pending CN103252373A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104588426A (en) * 2015-01-14 2015-05-06 江苏创一精锻有限公司 Energy accumulator tank forging forming process and extrusion die
CN106670251A (en) * 2017-03-15 2017-05-17 温州市强邦实业有限公司 Impact extrusion die for screw cap
CN107511447A (en) * 2017-10-25 2017-12-26 苏州华丰不锈钢紧固件有限公司 A kind of nut Sheet Metal Forming Technology
CN107695122A (en) * 2017-06-01 2018-02-16 浙江精力轴承科技有限公司 Long-life asymmetric shaft bearing ring cold-extrusion shaping mould
CN110253222A (en) * 2019-06-18 2019-09-20 贵州精立航太科技有限公司 A kind of high temperature supporting plate self-lock nut processing technology
CN111804750A (en) * 2019-04-11 2020-10-23 陈哲豪 Workpiece forming method with long slotted hole design and die thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2358609A1 (en) * 1973-11-24 1975-05-28 Kabel Metallwerke Ghh Production of closed hollow body in metal - uses backwards extrusion process operating on solid, cylindrical components
US4945749A (en) * 1989-10-30 1990-08-07 General Motors Corporation Cold forming dies and cold forming process
CN101767266A (en) * 2010-01-27 2010-07-07 洪国珍 Manufacturing method of magnesium nut and magnesium nut component thereof
CN101780628A (en) * 2010-03-08 2010-07-21 苏州工业园区新凯精密五金有限公司 Processing process for compressing and riveting nuts
CN102658306A (en) * 2012-05-14 2012-09-12 安徽工业大学 Blocking extrusion forming die

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2358609A1 (en) * 1973-11-24 1975-05-28 Kabel Metallwerke Ghh Production of closed hollow body in metal - uses backwards extrusion process operating on solid, cylindrical components
US4945749A (en) * 1989-10-30 1990-08-07 General Motors Corporation Cold forming dies and cold forming process
CN101767266A (en) * 2010-01-27 2010-07-07 洪国珍 Manufacturing method of magnesium nut and magnesium nut component thereof
CN101780628A (en) * 2010-03-08 2010-07-21 苏州工业园区新凯精密五金有限公司 Processing process for compressing and riveting nuts
CN102658306A (en) * 2012-05-14 2012-09-12 安徽工业大学 Blocking extrusion forming die

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104588426A (en) * 2015-01-14 2015-05-06 江苏创一精锻有限公司 Energy accumulator tank forging forming process and extrusion die
CN104588426B (en) * 2015-01-14 2016-09-14 江苏创一精锻有限公司 Accumulator tank body forging and forming technology and extrusion die
CN106670251A (en) * 2017-03-15 2017-05-17 温州市强邦实业有限公司 Impact extrusion die for screw cap
CN107695122A (en) * 2017-06-01 2018-02-16 浙江精力轴承科技有限公司 Long-life asymmetric shaft bearing ring cold-extrusion shaping mould
CN107511447A (en) * 2017-10-25 2017-12-26 苏州华丰不锈钢紧固件有限公司 A kind of nut Sheet Metal Forming Technology
CN107511447B (en) * 2017-10-25 2019-07-23 苏州华丰不锈钢紧固件有限公司 A kind of nut Sheet Metal Forming Technology
CN111804750A (en) * 2019-04-11 2020-10-23 陈哲豪 Workpiece forming method with long slotted hole design and die thereof
CN110253222A (en) * 2019-06-18 2019-09-20 贵州精立航太科技有限公司 A kind of high temperature supporting plate self-lock nut processing technology
CN110253222B (en) * 2019-06-18 2021-05-07 贵州精立航太科技有限公司 High-temperature supporting plate self-locking nut machining process

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Application publication date: 20130821