CN112792281A - Herringbone nut cold heading die and forming process - Google Patents

Herringbone nut cold heading die and forming process Download PDF

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Publication number
CN112792281A
CN112792281A CN202110140850.1A CN202110140850A CN112792281A CN 112792281 A CN112792281 A CN 112792281A CN 202110140850 A CN202110140850 A CN 202110140850A CN 112792281 A CN112792281 A CN 112792281A
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die
main
punching
upsetting
ejector pin
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王宁
田小娟
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Suzhou Xinkai Fastening System Co ltd
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Suzhou Xinkai Fastening System Co ltd
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Priority to CN202110140850.1A priority Critical patent/CN112792281A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/64—Making machine elements nuts
    • B21K1/68—Making machine elements nuts from round or profiled bars

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

本发明涉及人字形螺母制造技术领域，公开了一种人字形螺母冷镦模具，包括整形模、镦粗模、预镦一模、预镦二模和精镦模；各工位模均包括主模和冲模；主模固定设置；冲模位于主模正上方；还包括冲孔模；冲孔模的冲模设置于冲模套中；冲孔模的主模设置于主模套中；冲孔模的冲模包括可升降的冲模后顶杆和冲模顶针；冲孔模的主模包括固定设置的内模上端和可升降主模顶针；主模顶针位于内模上端底部。本发明的技术方案中人字形螺母通过冷镦挤工艺直接成型，减少加工工序，节省材料，提高加工效率，有效的降低生产时间。

Figure 202110140850

The invention relates to the technical field of herringbone nut manufacturing, and discloses a herringbone nut cold upsetting die, comprising a shaping die, an upsetting die, a pre-upsetting die, a second pre-upsetting die and a fine upsetting die; Die and punching die; the main die is fixedly arranged; the punching die is located just above the main die; it also includes a punching die; the punching die of the punching die is arranged in the punching die sleeve; the main die of the punching die is arranged in the main die sleeve; The punching die includes a liftable punching die rear ejector pin and a punching die ejector pin; the main die of the punching die includes a fixed upper end of the inner mould and a liftable main mould ejector pin; the main mould ejection pin is located at the bottom of the upper end of the inner mould. In the technical solution of the present invention, the herringbone nut is directly formed by the cold heading extrusion process, which reduces the processing procedure, saves materials, improves the processing efficiency, and effectively reduces the production time.

Figure 202110140850

Description

Herringbone nut cold heading die and forming process
Technical Field
The invention relates to the technical field of herringbone nut manufacturing, in particular to a herringbone nut cold heading die.
Background
The herringbone nut is a nut with a special shape, and in order to ensure that the herringbone nut meets certain mechanical strength, a cold heading processing technology is generally adopted. The existing cold heading die cannot meet the production requirement of direct cold heading forming of the nut, a CNC punching process is generally required to be added after the cold heading forming of the nut, or die-casting process forming is directly adopted, the efficiency is low, and the production period is long.
Disclosure of Invention
The invention provides a herringbone nut cold heading die which is directly formed through a cold heading extrusion process, reduces machining procedures, saves materials, improves machining efficiency and effectively reduces production time.
The working principle of the invention is as follows: a cold heading die for herringbone nuts comprises a sizing die, an upsetting die, a first pre-heading die, a second pre-heading die and a fine heading die; each station die comprises a main die and a stamping die; the main die is fixedly arranged; the stamping die is positioned right above the main die; the device also comprises a punching die; the punching die of the punching die is arranged in the punching die sleeve; the main die of the punching die is arranged in the main die sleeve; the punching die of the punching die comprises a rear punching die ejector rod and a punching die ejector pin which can be lifted; the main die of the punching die comprises an inner die upper end and a liftable main die thimble which are fixedly arranged; the main die ejector pin is positioned at the bottom of the upper end of the inner die.
Further, the method comprises the following steps: the punching die of the punching die further comprises a punching die rear pad and a punching die three-hole cushion block which are sequentially arranged from top to bottom.
Further, the method comprises the following steps: the rear ejector rod of the stamping die penetrates through the rear pad of the stamping die and then downwards props against the three-hole pad of the stamping die; the die punching thimble is downwards propped against the die punching three-hole cushion block; a die ejector pin sleeve is sleeved outside the die ejector pin; and the die ejector pin sleeve and the die ejector pin extend out of the die sleeve.
Further, the method comprises the following steps: the main die of the punching die also comprises a main die rear cushion block, a main die cushion block main die large cushion block and a main die rear cushion which are sequentially arranged from bottom to top; a main die ejector rod is arranged at the bottom of the cushion block behind the main die; the main die big cushion block is arranged on the main die rear cushion block and penetrates through the main die cushion block; the main die ejector pin is arranged on the main die big cushion block; when the main mold ejector rod is ejected upwards, the main mold ejector pin penetrates through the upper end of the inner mold upwards and is ejected; and a main die ejector sleeve is sleeved outside the main die ejector pin.
A herringbone nut forming process based on a cold heading die comprises the following steps:
s1: cutting the materials, namely cutting the materials,
cutting off the wire;
s2: the shaping is carried out by the shaping machine,
putting the cut wire into a sizing die, pushing the wire into a cavity of a main die by a stamping die ejector pin, and then pushing out the sized part by a main die ejector pin and a main die ejector pin;
s3: the mixture is subjected to upsetting to obtain a coarse powder,
placing the part on an upsetting die, pushing the part into a cavity of a main die by a stamping die ejector pin, upsetting and extruding the part into a herringbone shape, and then pushing the upset part out by a main die ejector pin and a main die ejector pin;
s4: pre-upsetting is carried out in advance,
placing the part on a pre-upsetting first die, pushing the part into a cavity of a main die by a stamping die thimble, pre-upsetting, then ejecting three thimbles of the main die and a main die rear cushion block upwards, and pushing out the pre-upset part;
s5: the pre-upsetting is carried out for the second time,
placing the part on a pre-upsetting secondary die, pushing the part into a cavity of a main die by a stamping die thimble, and performing secondary pre-upsetting forming on the material by the stamping die thimble by using pressure;
s6: the fine upsetting is carried out, and the fine upsetting,
placing the part on a fine upsetting die, pressing down the stamping die, forming the part in a cavity by using pressure, and ejecting the part by using a main die;
s7: punching a hole, wherein the hole is punched,
and placing the part on a punching die, pressing down the punching die, fixing the part in the main die cavity by a punching die ejector pin to complete punching, and finally ejecting the part by the main die.
Further, the method comprises the following steps: in the steps S3-S7, the punch pins always protrude out of the die surface of the punch, the punch wraps the material after the punch pins receive the material, and then the punch pins apply pressure to the material.
The invention has the beneficial effects that: according to the technical scheme, all dimensions of the appearance are completed by using a cold heading technology, herringbone characteristics and through hole punching are completed in a cold heading die, and materials are formed at one time through six-station cold heading, so that the materials are saved, the integrity of a metal streamline is ensured, the strength of parts is improved, the processing procedures are reduced, and the processing efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a cold heading die;
FIG. 2 is a schematic view of a herringbone nut forming process;
fig. 3 is a schematic diagram of a punching die structure.
Labeled as: 1. shaping the die; 2. upsetting a die; 3. pre-upsetting a die; 4. pre-upsetting a second die; 5. fine upsetting a die; 6. punching a hole die; 61. punching a die sleeve; 610. punching a rear cushion; 611. punching a small ejector rod; 612. punching a three-hole cushion block; 613. punching a rear ejector rod; 614. punching a thimble; 615. punching a thimble sleeve; 62. a main die sleeve; 620. the upper end of the inner mold; 621. a cushion block behind the main mold; 622. a main die cushion block; 623. a large cushion block of the master mold; 624. backing up the master die; 625. ejecting a rod from the main mold; 626. jacking and sleeving the main mold; 627. and (4) a main die thimble.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 3, the herringbone nut cold heading die comprises a shaping die 1, an upsetting die 2, a pre-heading first die 3, a pre-heading second die 4 and a fine heading die 5; each station die comprises a main die and a stamping die; the main die is fixedly arranged; the stamping die is positioned right above the main die; also comprises a punching die 6; the punching die of the punching die 6 is arranged in the punching die sleeve 61; the main die of the punching die 6 is arranged in the main die sleeve 62; the punching die of the punching die 6 comprises a punching die rear ejector rod 613 and a punching die ejector pin 614 which can lift; the main die of the punching die 6 comprises an inner die upper end 620 and a liftable main die ejector pin 627 which are fixedly arranged; the main mold thimble 627 is located at the bottom of the inner mold upper end 620.
On the basis, as shown in fig. 3, the die of the punching die 6 further includes a die back pad 610 and a die three-hole pad 612, which are sequentially arranged from top to bottom.
The die back ram 613 pushes down through the die back pad 610 against the die three hole pad 612; the die three-hole pad 612 presses downward against the die ejector pin 614; a die ejector sleeve 615 is sleeved outside the die ejector pin 614; the die thimble sleeve 615 and the die thimble 614 both extend out of the die sleeve 61.
The main die of the punching die 6 further comprises a main die rear cushion block 621, a main die cushion block 622, a main die big cushion block 623 and a main die rear cushion 624 which are sequentially arranged from bottom to top; a main mold ejector rod 625 is arranged at the bottom of the main mold rear cushion block 621; the main die big cushion block 623 is arranged on the main die rear cushion block 621 and penetrates through the main die cushion block 622; the main mold ejector pin 627 is arranged on the main mold big cushion block 623; when the main mold ejector rod 625 is ejected upwards, the main mold ejector pin 627 penetrates through the upper end 620 of the inner mold upwards and is ejected; a main mold top sleeve 626 is sleeved outside the main mold top needle 627.
When the die is used for processing the herringbone nut, the method mainly comprises the following steps: shearing, shaping, upsetting, pre-upsetting, secondary pre-upsetting, fine upsetting and punching.
Cutting a wire into a proper size, putting the wire into a sizing die 1, pushing the wire into a cavity of a main die by a stamping die thimble of the sizing die 1, shaping by pressure, and then pushing out the shaped part by the main die thimble and a main die ejector rod;
placing the shaped part on an upsetting die 2, pushing the part into a cavity of a main die by a punch die thimble of the upsetting die 2, upsetting and extruding the part into a herringbone shape, and then pushing out the upset part by a main die thimble and a main die ejector rod;
placing the part subjected to upsetting on a pre-upsetting first die, pushing the part into a cavity of a main die by a stamping die thimble, ejecting a three-thimble main die and a main die rear cushion block upwards, and pushing out the part subjected to pre-upsetting;
placing the pre-upset part on a pre-upset secondary die, pushing the part into a main die cavity by a die stamping thimble, and performing secondary pre-upset molding on the material by the die stamping thimble by using pressure;
placing the part subjected to secondary pre-upsetting forming on a fine upsetting die, pressing down a stamping die, forming the part in a cavity by using pressure, and ejecting the part by using a main die;
and (3) placing the part subjected to pre-upsetting on a punching die, pressing down the punching die, positioning the part in the main die cavity by the punching die ejector pin to complete punching, and after the punching is finished, moving the main die ejector rod upwards to drive the main die ejector pin to eject the part.
In the steps S3-S7, the punch pins always protrude out of the die surface of the punch, the punch wraps the material after the punch pins receive the material, and then the punch pins apply pressure to the material.
According to the technical scheme, all dimensions of the appearance are completed by using a cold heading technology, herringbone characteristics and through hole punching are completed in a cold heading die, and materials are formed at one time through six-station cold heading, so that the materials are saved, the integrity of a metal streamline is ensured, the strength of parts is improved, the processing procedures are reduced, and the processing efficiency is improved.
The above embodiments should not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent transformations fall within the protection scope of the present invention.

Claims (6)

1.一种人字形螺母冷镦模具，包括整形模(1)、镦粗模(2)、预镦一模(3)、预镦二模(4)和精镦模(5)；所述各工位模均包括主模和冲模；所述主模固定设置；所述冲模位于主模正上方；其特征在于：还包括冲孔模(6)；所述冲孔模(6)的冲模设置于冲模套(61)中；所述冲孔模(6)的主模设置于主模套(62)中；所述冲孔模(6)的冲模包括可升降的冲模后顶杆(613)和冲模顶针(614)；所述冲孔模(6)的主模包括固定设置的内模上端(620)和可升降主模顶针(627)；所述主模顶针(627)位于内模上端(620)底部。1. A herringbone nut cold heading mold, comprising a shaping mold (1), an upsetting mold (2), a pre-upsetting mold (3), a pre-upsetting two molds (4) and a fine upsetting mold (5); the Each station die includes a main die and a punching die; the main die is fixedly arranged; the punching die is located just above the main die; it is characterized in that it further comprises a punching die (6); a punching die of the punching die (6) is arranged in the die sleeve (61); the main die of the punching die (6) is arranged in the main die sleeve (62); the punching die of the punching die (6) includes a rear ejector pin (613) that can be raised and lowered ) and a punching die ejector pin (614); the main die of the punching die (6) includes a fixed inner die upper end (620) and a liftable main die ejector pin (627); the main die ejector pin (627) is located in the inner die Upper end (620) bottom. 2.根据权利要求1所述的一种人字形螺母冷镦模具，其特征在于：所述冲孔模(6)的冲模还包括由上至下依次设置的冲模后垫(610)和冲模三孔垫块(612)。2. A kind of herringbone nut cold heading die according to claim 1, characterized in that: the punching die of the punching die (6) further comprises a punching die rear pad (610) and a punching die three that are sequentially arranged from top to bottom. Hole Spacer (612). 3.根据权利要求2所述的一种人字形螺母冷镦模具，其特征在于：所述冲模后顶杆(613)穿过冲模后垫(610)后向下抵住冲模三孔垫块(612)；所述冲模三孔垫块(612)向下抵住冲模顶针(614)；所述冲模顶针(614)外套设有冲模顶针套(615)；所述冲模顶针套(615)和冲模顶针(614)均伸出冲模套(61)。3. A herringbone nut cold heading die according to claim 2, characterized in that: the rear ejector rod (613) of the punching die passes through the punching die rear pad (610) and then presses down against the punching die three-hole spacer (610). 612); the punching die three-hole spacer (612) presses down on the punching die ejector pin (614); the outer covering of the punching die ejector pin (614) is provided with a punching die ejector needle sleeve (615); the punching die ejector needle sleeve (615) and the punching die The ejector pins (614) all extend out of the die sleeve (61). 4.根据权利要求1所述的一种人字形螺母冷镦模具，其特征在于：所述冲孔模(6)的主模还包括由下至上依次设置的主模后垫块(621)、主模垫块(622)主模大垫块(623)和主模后垫(624)；所述主模后垫块(621)底部设置有主模顶出杆(625)；所述主模大垫块(623)设置于主模后垫块(621)上并贯穿主模垫块(622)；所述主模顶针(627)设置于主模大垫块(623)上；所述主模顶出杆(625)向上顶出时，主模顶针(627)向上穿过内模上端(620)顶出；所述主模顶针(627)外套设有主模顶套(626)。4. A herringbone nut cold heading die according to claim 1, characterized in that: the main die of the punching die (6) further comprises a main die rear cushion block (621), A main mold spacer (622) a large main mold spacer (623) and a main mold rear spacer (624); a main mold ejector rod (625) is provided at the bottom of the main mold rear spacer block (621); the main mold The large spacer block (623) is arranged on the rear spacer block (621) of the main mold and penetrates through the main mold spacer block (622); the main mold ejector pin (627) is disposed on the main mold large spacer block (623); When the die ejector rod (625) is pushed upward, the main die ejector pin (627) is pushed upward through the upper end (620) of the inner die; the main die ejector pin (627) is provided with a main die ejector sleeve (626). 5.一种基于冷镦模具的人字形螺母成型工艺，其特征在于：包括以下步骤：5. a herringbone nut forming process based on cold heading mould, is characterized in that: comprise the following steps: S1：剪料，S1: cut material, 将线材切断；cut the wire; S2：整形，S2: shaping, 将切断的线材放入整形模中，冲模顶针推着线材进入主模型腔中，然后主模顶针和主模顶杆将整形后的零件推出；Put the cut wire into the shaping die, the die ejector pushes the wire into the main mold cavity, and then the main mold ejector and the main mold ejector push out the shaped parts; S3：镦粗，S3: Upsetting, 将零件放到镦粗模上，冲模顶针推着零件进入主模型腔中，镦粗挤成人字形，然后主模顶针和主模顶杆将镦粗后的零件推出；Put the part on the upsetting die, the die ejector pin pushes the part into the main mold cavity, upsetting and extruding into a herringbone shape, and then the main mold ejector pin and the main mold ejector pin push the upsetting part out; S4：预镦，S4: pre-upsetting, 将零件放到预镦一模上，冲模顶针推着零件进入主模型腔中预镦，然后主模三顶针和主模后垫块向上顶出，将预镦后的零件推出；Put the part on the first pre-upsetting die, the die ejector pin pushes the part into the main mold cavity for pre-upsetting, and then the main mold three ejector pins and the rear spacer of the main mold are pushed up, and the pre-upset part is pushed out; S5：二次预镦，S5: Secondary pre-upsetting, 将零件放到预镦二模上，冲模顶针推着零件进入主模型腔中，冲模顶针利用压力使得使材料二次预镦成型；Put the part on the second pre-upsetting die, the die thimble pushes the part into the main mold cavity, and the die thimble uses the pressure to make the material pre-upset for the second time; S6：精镦，S6: fine upsetting, 将零件放到精镦模上，冲模下压，利用压力使得零件在型腔中成型，最后主模将零件顶出；Put the part on the fine upsetting die, press the die down, use the pressure to make the part form in the cavity, and finally the main die pushes the part out; S7：冲孔，S7: Punching, 将零件放到冲孔模上，冲模下压，冲模顶针将零件定在主模型腔中完成冲孔，最后主模将零件顶出。Put the part on the punching die, press the die down, the die ejector pin fixes the part in the main model cavity to complete the punching, and finally the main die pushes the part out. 6.根据权利要求5所述的一种人字形螺母成型工艺，其特征在于：所述步骤S3-S7中，冲模顶针始终突出冲模模面，冲模顶针接料后冲模包住材料，然后冲模顶针再对材料施加压力。6. A herringbone nut forming process according to claim 5, characterized in that: in the steps S3-S7, the die ejector pin always protrudes from the die surface of the die, and after the die ejector pin receives the material, the die wraps the material, and then the die ejector pin protrudes from the die surface of the die. Apply pressure to the material again.
CN202110140850.1A 2021-02-02 2021-02-02 Herringbone nut cold heading die and forming process Pending CN112792281A (en)

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Publication number Priority date Publication date Assignee Title
CN113634707A (en) * 2021-06-29 2021-11-12 中国航空工业标准件制造有限责任公司 Preparation method of 302-material self-locking nut by hot heading forming
CN116967383A (en) * 2023-06-30 2023-10-31 中国航空工业标准件制造有限责任公司 Cross bushing that increases the life of the ejector pin and how to use it

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CN105290300A (en) * 2015-11-12 2016-02-03 苏州工业园区新凯精密五金有限公司 Cold heading process of chassis eccentric nut and mold structure for forming special-shaped hole
CN106180503A (en) * 2016-08-29 2016-12-07 苏州工业园区新凯精密五金有限公司 The cold-heading molding technique of a kind of self-clinching nut and the mould structure of forming embossing tooth thereof
CN109513874A (en) * 2018-12-29 2019-03-26 苏州工业园区新凯精密五金有限公司 It is a kind of for manufacturing the cold-heading molding technique and cold heading die group of tetragonal pyramid bottom nut
CN112077256A (en) * 2020-08-31 2020-12-15 上海鸿基金属制品有限公司 Cold heading forming process of double-head spline tooth connecting sleeve
CN214392182U (en) * 2021-02-02 2021-10-15 苏州新凯紧固系统有限公司 A kind of herringbone nut cold heading die

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113634707A (en) * 2021-06-29 2021-11-12 中国航空工业标准件制造有限责任公司 Preparation method of 302-material self-locking nut by hot heading forming
CN116967383A (en) * 2023-06-30 2023-10-31 中国航空工业标准件制造有限责任公司 Cross bushing that increases the life of the ejector pin and how to use it

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